JP2013229770A - Mobile station device, base station device, communication method, integrated circuit, and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile station device, a base station device, a communication method, an integrated circuit, and a radio communication system which enable the base station device and the mobile station device to efficiently intercommunicate by determining a parameter related to an uplink signal or an uplink reference signal.SOLUTION: A mobile station device which communicates with a base station device, generates an uplink signal by using a first parameter or a second parameter on the basis of detection of a physical downlink control channel, and transmits the generated uplink signal in a first physical uplink control channel format or a second physical uplink control channel format.

Description

  The present invention relates to a mobile station device, a base station device, a communication method, an integrated circuit, and a wireless communication system.

  3GPP (Third Generation Partnership Project) in due LTE (Long Term Evolution), in the LTE-A (LTE-Advanced) and wireless communication systems, such as the IEEE WiMAX due to the (The Institute of Electrical and Electronics engineers) (Worldwide Interoperability for Microwave Access) is Each of the base station and the terminal is provided with one or a plurality of transmission / reception antennas, and high-speed data transmission can be realized by using, for example, a MIMO (Multiple Input Multiple Output) technique.

  Here, in a wireless communication system, it is considered that a plurality of terminals support MU-MIMO (Multiple User MIMO) that performs spatial multiplexing using the same frequency and time resources. In addition, it has been studied to support a CoMP (Cooperative Multipoint) transmission scheme in which a plurality of base stations cooperate with each other to perform interference coordination. For example, a wireless communication system in a heterogeneous network deployment (HetNet; Heterogeneous Network deployment) such as a macro base station with a wide coverage and an RRH (Remote Radio Head) with a narrower coverage than the macro base station is being studied.

  In such a wireless communication system, when uplink signals (for example, uplink control information signals) transmitted by each of a plurality of terminals have the same characteristics, interference occurs. In addition, when uplink reference signals transmitted by each of a plurality of terminals have the same characteristics, interference occurs. Here, for example, a method for orthogonalizing a demodulation reference signal in order to reduce and suppress interference of a demodulation reference signal (DMRS; also referred to as a Demodulation Reference Signal) transmitted by each of a plurality of terminals And a method for randomizing the interference of the demodulation reference signal has been proposed (Non-patent Document 1).

DMRS configuration for UL CoMP; 3GPP TSG RAN WG1 meeting # 68bis R1-1121350, March 26th-30th, 2012.

  However, in the wireless communication system as described above, there is no description regarding a specific procedure when the base station and the terminal determine parameters relating to the uplink signal or the uplink reference signal. That is, there is no description of how the base station and the terminal determine parameters related to the uplink signal or the uplink reference signal and perform communication.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to enable a base station and a terminal to determine parameters related to an uplink signal or an uplink reference signal and efficiently communicate with each other. A base station apparatus, a mobile station apparatus, a communication method, and a communication system are provided.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, a mobile station apparatus that communicates with a base station apparatus, and in one subframe, a physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell When detected in the common search space, the uplink signal generated using the first parameter is transmitted to the base station apparatus in the first physical uplink control channel format. In addition, the mobile station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to a user apparatus specific search in the primary cell. When detected in space, the uplink signal generated using the second parameter is transmitted to the base station apparatus in the first physical uplink control channel format. Further, when the mobile station apparatus detects a physical downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe, the mobile station apparatus uses the second parameter. The uplink signal generated in this manner is transmitted to the base station apparatus in a second physical uplink control channel format.

  (2) Further, in the mobile station apparatus that communicates with the base station apparatus, in a certain subframe, one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell When detected in the common search space in the primary cell, an uplink signal generated using the first parameter is transmitted to the base station apparatus by the first transmission method. In addition, the mobile station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to a user apparatus specific search in the primary cell. When detected in space, the uplink signal generated using the second parameter is transmitted to the base station apparatus by a second transmission method. Further, when the mobile station apparatus detects a physical downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe, the mobile station apparatus uses the second parameter. The uplink signal generated in this way is transmitted to the base station apparatus by the second transmission method.

  (3) In addition, in the base station apparatus that communicates with the mobile station apparatus, in one subframe, one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is When arranged in the common search space in the primary cell, the uplink signal generated using the first parameter is received from the mobile station apparatus in the first physical uplink control channel format. Yes. In addition, the base station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to a user apparatus specific search in the primary cell. When arranged in a space, the uplink signal generated using the second parameter is received from the mobile station apparatus in the first physical uplink control channel format. The base station apparatus uses the second parameter when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe. The uplink signal generated in this way is received from the mobile station apparatus in a second physical uplink control channel format.

  (4) In addition, in the base station device that communicates with the mobile station device, in one subframe, one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell When arranged in the common search space in the primary cell, the uplink signal generated using the first parameter is received from the mobile station apparatus by the first transmission method. In addition, the base station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to a user apparatus specific search in the primary cell. When arranged in a space, the uplink signal generated using the second parameter is received from the mobile station apparatus by the second transmission method. The base station apparatus uses the second parameter when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe. The uplink signal generated in this way is received from the mobile station apparatus by the second transmission method.

  (5) Moreover, it is a communication method of the mobile station apparatus which communicates with a base station apparatus, Comprising: One physical downlink control channel which schedules transmission on one physical downlink shared channel only in a primary cell in a certain subframe Is detected in the common search space in the primary cell, the uplink signal generated using the first parameter is transmitted to the base station apparatus in the first physical uplink control channel format. It is a feature. In addition, the communication method of the mobile station apparatus is configured such that, in a certain subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is transmitted to a user in the primary cell. When detected in a device specific search space, the uplink signal generated using a second parameter is transmitted to the base station device in the first physical uplink control channel format. . Further, the communication method of the mobile station apparatus is configured such that when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a certain subframe, the second parameter And transmitting the uplink signal generated by using the second physical uplink control channel format to the base station apparatus.

  (6) Moreover, it is a communication method of the mobile station apparatus which communicates with a base station apparatus, Comprising: One physical downlink control channel which schedules transmission on one physical downlink shared channel only in a primary cell in a certain subframe Is detected in the common search space in the primary cell, the uplink signal generated using the first parameter is transmitted to the base station apparatus by the first transmission method. In addition, the communication method of the mobile station apparatus is configured such that, in a certain subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is transmitted to a user in the primary cell. When it is detected in the device specific search space, the uplink signal generated using the second parameter is transmitted to the base station device by the second transmission method. Further, the communication method of the mobile station apparatus is configured such that when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a certain subframe, the second parameter The uplink signal generated by using the second transmission method is transmitted to the base station apparatus by the second transmission method.

  (7) Moreover, it is a communication method of the base station apparatus which communicates with a mobile station apparatus, Comprising: One physical downlink control channel which schedules transmission on one physical downlink shared channel only in a primary cell in a certain subframe Is placed in the common search space in the primary cell, the uplink signal generated using the first parameter is received from the mobile station apparatus in the first physical uplink control channel format. It is characterized by. In addition, the communication method of the base station apparatus is configured such that, in a certain subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is assigned to a user in the primary cell. When arranged in a device specific search space, the uplink signal generated using a second parameter is received from the mobile station device in the first physical uplink control channel format. Yes. Further, the communication method of the base station apparatus is configured such that when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the second parameter And receiving the uplink signal generated by using the second physical uplink control channel format from the mobile station apparatus.

  (8) Moreover, it is a communication method of the base station apparatus which communicates with a mobile station apparatus, Comprising: One physical downlink control channel which schedules transmission on one physical downlink shared channel only in a primary cell in a certain subframe Is arranged in the common search space in the primary cell, the uplink signal generated using the first parameter is received from the mobile station apparatus by the first transmission method. . In addition, the communication method of the base station apparatus is configured such that, in a certain subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is assigned to a user in the primary cell. When arranged in the device specific search space, the uplink signal generated using the second parameter is received from the mobile station device by the second transmission method. Further, the communication method of the base station apparatus is configured such that when a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the second parameter The uplink signal generated by using the second transmission method is received from the mobile station apparatus by the second transmission method.

  (9) Also, an integrated circuit mounted on a mobile station apparatus that communicates with a base station apparatus, and in one subframe, one physical downlink that schedules transmission on one physical downlink shared channel only in the primary cell When the link control channel is detected in the common search space in the primary cell, the uplink signal generated using the first parameter is transmitted to the base station apparatus in the first physical uplink control channel format. It is characterized in that the function to perform is performed by the mobile station apparatus. The integrated circuit mounted on the mobile station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to the primary A function of transmitting the uplink signal generated using a second parameter to the base station apparatus in the first physical uplink control channel format when detected in a user equipment specific search space in a cell; It is characterized in that it is exhibited by the mobile station device. The integrated circuit mounted on the mobile station apparatus detects the physical downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe. The mobile station apparatus is caused to exhibit a function of transmitting the uplink signal generated using the parameter 2 to the base station apparatus in a second physical uplink control channel format.

  (10) An integrated circuit mounted on a mobile station apparatus that communicates with a base station apparatus, and in one subframe, one physical downlink that schedules transmission on one physical downlink shared channel only in the primary cell A function of transmitting an uplink signal generated using a first parameter to the base station apparatus by a first transmission method when a link control channel is detected in a common search space in the primary cell; It is characterized in that it is demonstrated to a mobile station device. The integrated circuit mounted on the mobile station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to the primary When detecting in the user equipment specific search space in the cell, the mobile station apparatus has a function of transmitting the uplink signal generated using the second parameter to the base station apparatus by the second transmission method. It is characterized by being demonstrated. The integrated circuit mounted on the mobile station apparatus detects the physical downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe. The mobile station apparatus has a function of transmitting the uplink signal generated using the parameter 2 to the base station apparatus by the second transmission method.

  (11) Also, an integrated circuit mounted on a base station apparatus that communicates with a mobile station apparatus, and in one subframe, one physical downlink that schedules transmission on one physical downlink shared channel only in the primary cell When the link control channel is arranged in the common search space in the primary cell, the uplink signal generated using the first parameter is transmitted from the mobile station apparatus in the first physical uplink control channel format. It is characterized in that a function of receiving is exhibited by the base station apparatus. Further, the integrated circuit mounted on the base station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to the primary A function of receiving the uplink signal generated using the second parameter from the mobile station apparatus in the first physical uplink control channel format when arranged in the user apparatus specific search space in the cell To the base station apparatus. Further, the integrated circuit mounted on the base station apparatus may include the first downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe. The base station apparatus has a function of receiving the uplink signal generated using the parameter 2 from the mobile station apparatus in a second physical uplink control channel format.

  (12) An integrated circuit mounted on a base station apparatus that communicates with a mobile station apparatus, and in one subframe, one physical downlink that schedules transmission on one physical downlink shared channel only in the primary cell When the link control channel is arranged in the common search space in the primary cell, the function of receiving the uplink signal generated using the first parameter from the mobile station apparatus by the first transmission method is provided. It is characterized by causing the base station device to exhibit. Further, the integrated circuit mounted on the base station apparatus transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell in a certain subframe to the primary When arranged in a user equipment specific search space in a cell, the function of receiving the uplink signal generated using the second parameter from the mobile station apparatus by the second transmission method is exhibited. It is a feature. Further, the integrated circuit mounted on the base station apparatus may include the first downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell in a certain subframe. The base station apparatus has a function of receiving the uplink signal generated using the parameter 2 from the mobile station apparatus by the second transmission method.

  (13) A radio communication system in which a base station apparatus and a mobile station apparatus communicate with each other, and the base station apparatus schedules transmission on one physical downlink shared channel only in a primary cell in a certain subframe. The one physical downlink control channel which arranges one physical downlink control channel in the common search space in the primary cell and schedules transmission in the one physical downlink shared channel only in the primary cell in a certain subframe. A physical downlink control channel that arranges a control channel in the user equipment specific search space in the primary cell and schedules transmission in a physical downlink shared channel in at least one secondary cell in a certain subframe. It is characterized in placing a. In the wireless communication system, the mobile station device transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell to the common search in the primary cell. If detected in space, the uplink signal generated using the first parameter is transmitted to the base station apparatus in the first physical uplink control channel format, and the one physical cell only in the primary cell is transmitted. When the one physical downlink control channel that schedules transmission on the downlink shared channel is detected in the user equipment specific search space in the primary cell, the uplink signal generated using the second parameter The first physical up When the physical downlink control channel that transmits to the base station apparatus in the link control channel format and schedules transmission on the physical downlink shared channel in the at least one secondary cell is detected, the second parameter And transmitting the uplink signal generated by using the second physical uplink control channel format to the base station apparatus.

  (14) In addition, in the wireless communication system in which the base station apparatus and the mobile station apparatus communicate with each other, the base station apparatus schedules transmission on one physical downlink shared channel only in the primary cell in a certain subframe. The one physical downlink control channel which arranges one physical downlink control channel in the common search space in the primary cell and schedules transmission in the one physical downlink shared channel only in the primary cell in a certain subframe. A physical downlink control channel that arranges a control channel in the user equipment specific search space in the primary cell and schedules transmission in a physical downlink shared channel in at least one secondary cell in a certain subframe. It is characterized in placing a. In the wireless communication system, the mobile station device transmits the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell to the common search in the primary cell. When detected in space, the uplink signal generated using the first parameter is transmitted to the base station apparatus by the first transmission method, and the one physical downlink shared channel only in the primary cell When the one physical downlink control channel that schedules transmission in the primary cell is detected in the user equipment specific search space in the primary cell, the uplink signal generated using the second parameter is 2 to the base station apparatus by the transmission method of 2, When the physical downlink control channel that schedules transmission on the physical downlink shared channel in at least one secondary cell is detected, the uplink signal generated using the second parameter is It transmits to the said base station apparatus by the 2nd transmission method, It is characterized by the above-mentioned.

  According to the present invention, a base station and a terminal can determine parameters related to an uplink signal or an uplink reference signal and efficiently communicate with each other.

It is a schematic block diagram which shows the structure of the base station which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the terminal which concerns on embodiment of this invention. It is the schematic which shows the example of the communication which concerns on embodiment of this invention. It is a figure which shows the example of a downlink signal. It is a figure explaining the example of the structure of PUCCH format 1a / 1b. It is a figure explaining the example of the structure of PUCCH format 3. FIG. It is a figure explaining the example of transmission of the uplink control information by channel selection. It is a figure explaining embodiment of this invention. It is another figure explaining embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described. The wireless communication system in the embodiment of the present invention is a base station device (hereinafter also referred to as a base station device, a transmission device, a cell, a serving cell, a transmission station, a transmission point, a transmission antenna group, a transmission antenna port group, and an eNodeB). Primary base station (also called macro base station, first base station, first communication device, serving base station, anchor base station, primary cell) and secondary base station (RRH, pico base station, femto base station) , Home eNodeB, second base station apparatus, second communication apparatus, cooperative base station group, cooperative base station set, cooperative base station, and secondary cell). Also referred to as a mobile station device (hereinafter referred to as a terminal, a mobile station device, a receiving device, a receiving point, a receiving terminal, a third communication device, a receiving antenna group, a receiving antenna port group, and a user equipment (UE)). ).

  Here, the secondary base station may be indicated as a plurality of secondary base stations. For example, the primary base station and the secondary base station can communicate with the terminal by using a heterogeneous network arrangement in which part or all of the coverage of the secondary base station is included in the coverage of the primary base station.

  FIG. 1 is a schematic block diagram showing the configuration of a base station according to the embodiment of the present invention. Here, the base station shown in FIG. 1 includes a primary base station and a secondary base station. The base station includes a data control unit 101, a transmission data modulation unit 102, a radio unit 103, a scheduling unit 104, a channel estimation unit 105, a reception data demodulation unit 106, a data extraction unit 107, an upper layer 108, And the antenna 109. Radio section 103, scheduling section 104, channel estimation section 105, reception data demodulation section 106, data extraction section 107, upper layer 108 and antenna 109 constitute a reception section. Further, the data control unit 101, the transmission data modulation unit 102, the radio unit 103, the scheduling unit 104, the upper layer 108, and the antenna 109 constitute a transmission unit. Here, each part which comprises a base station is also called a unit.

  The data control unit 101 receives a transport channel from the scheduling unit 104. The data control unit 101 maps signals generated in the transport channel and the physical layer to the physical channel based on scheduling information input from the scheduling unit 104. Each mapped data is output to transmission data modulation section 102.

  The transmission data modulation unit 102 modulates / encodes transmission data. The transmission data modulation unit 102 modulates / encodes the data input from the data control unit 101 based on scheduling information from the scheduling unit 104, serial / parallel conversion of the input signal, IFFT (Inverse Fast Fourier Transform). Conversion: Performs signal processing such as inverse phase Fourier transform (CP) processing and CP (cyclic prefix) insertion, generates transmission data, and outputs the transmission data to the radio section 103.

  Radio section 103 up-converts the transmission data input from transmission data modulation section 102 to a radio frequency to generate a radio signal, and transmits the radio signal to a terminal via antenna 109. Radio section 103 receives a radio signal received from the terminal via antenna 109, down-converts it to a baseband signal, and outputs received data to channel estimation section 105 and received data demodulation section 106.

  The scheduling unit 104 performs mapping between logical channels and transport channels, downlink and uplink scheduling, and the like. Since the scheduling unit 104 controls the processing units of each physical layer in an integrated manner, the scheduling unit 104, the antenna 109, the radio unit 103, the channel estimation unit 105, the reception data demodulation unit 106, the data control unit 101, the transmission data modulation An interface between the unit 102 and the data extraction unit 107 exists.

  In downlink scheduling, the scheduling unit 104 generates transmission control and scheduling information in the transport channel and physical channel based on uplink control information received from the terminal, scheduling information input from the higher layer 108, and the like. To do. The scheduling information used for downlink scheduling is output to the data control unit 101.

  Further, in uplink scheduling, scheduling section 104 generates scheduling information based on the uplink channel state output from channel estimation section 105, scheduling information input from higher layer 108, and the like. Scheduling information used for uplink scheduling is output to the data control unit 101.

  In addition, the scheduling unit 104 maps the downlink logical channel input from the higher layer 108 to the transport channel, and outputs it to the data control unit 101. Also, the scheduling unit 104 processes the uplink transport channel and control data input from the data extraction unit 107 as necessary, maps them to the uplink logical channel, and outputs them to the upper layer 108.

  Further, the scheduling unit 104 determines parameters related to the uplink signal, and assumes that the uplink signal is generated by the terminal using the determined parameter. Further, the scheduling unit 104 determines a parameter related to the reference signal, and assumes that the uplink reference signal is generated by the terminal using the determined parameter.

  The channel estimation unit 105 estimates an uplink channel state from an uplink reference signal (for example, a demodulation reference signal) for demodulation of the uplink signal, and outputs it to the reception data demodulation unit 106. Further, in order to perform uplink scheduling, an uplink channel state is estimated from an uplink reference signal (for example, a sounding reference signal) and output to scheduling section 104.

  Received data demodulation section 106 demodulates received data. Based on the uplink channel state estimation result input from the channel estimation unit 105, the reception data demodulation unit 106 performs DFT conversion, subcarrier mapping, IFFT conversion, etc. on the modulation data input from the radio unit 103. Signal processing is performed, demodulation processing is performed, and the data is output to the data extraction unit 107.

  The data extraction unit 107 confirms whether the received data input from the received data demodulation unit 106 is correct and outputs a confirmation result (eg, ACK or NACK) to the scheduling unit 104. The data extraction unit 107 separates the data input from the reception data demodulation unit 106 into a transport channel and physical layer control data, and outputs the separated data to the scheduling unit 104.

  The upper layer 108 performs processing of a radio resource control (RRC) layer and processing of a MAC (Media Access Control) layer. The upper layer 108 integrates and controls the processing units of the lower layer, so the upper layer 108, the scheduling unit 104, the antenna 109, the radio unit 103, the channel estimation unit 105, the received data demodulation unit 106, the data control unit 101, There is an interface between the transmission data modulation unit 102 and the data extraction unit 107.

  FIG. 2 is a schematic block diagram showing the configuration of the terminal according to the embodiment of the present invention. The terminal includes a data control unit 201, a transmission data modulation unit 202, a radio unit 203, a scheduling unit 204, a channel estimation unit 205, a reception data demodulation unit 206, a data extraction unit 207, an upper layer 208, an antenna 209. The data control unit 201, transmission data modulation unit 202, radio unit 203, scheduling unit 204, upper layer 208, and antenna 209 constitute a transmission unit. The radio unit 203, scheduling unit 204, channel estimation unit 205, reception data demodulation unit 206, data extraction unit 207, higher layer 208, and antenna 209 constitute a reception unit. Here, each part which comprises a terminal is also called a unit.

  The data control unit 201 receives a transport channel from the scheduling unit 204. Further, the data control unit 201 maps signals generated in the transport channel and the physical layer to the physical channel based on the scheduling information input from the scheduling unit 204. Each mapped data is output to transmission data modulation section 202.

  The transmission data modulation unit 202 modulates / encodes transmission data. Transmission data modulation section 202 performs signal processing such as modulation / coding, input signal serial / parallel conversion, IFFT processing, CP insertion on the data input from data control section 201 to generate transmission data. To the wireless unit 203.

  Radio section 203 up-converts transmission data input from transmission data modulation section 202 to a radio frequency, generates a radio signal, and transmits the radio signal to a base station via antenna 209. Radio section 203 receives a radio signal received from the base station via antenna 209, down-converts it to a baseband signal, and outputs the received data to channel estimation section 205 and received data demodulation section 206. .

  The scheduling unit 104 performs mapping between logical channels and transport channels, downlink and uplink scheduling, and the like. Since the scheduling unit 204 controls the processing units of each physical layer in an integrated manner, the scheduling unit 204, the antenna 209, the data control unit 201, the transmission data modulation unit 202, the channel estimation unit 205, the reception data demodulation unit 206, the data There is an interface between the extraction unit 207 and the wireless unit 203.

  In the downlink scheduling, the scheduling unit 204 performs reception control and scheduling information on the transport channel and the physical channel based on downlink control information received from the base station, scheduling information input from the higher layer 208, and the like. Generate. The scheduling information used for downlink scheduling is output to the data control unit 201.

  In addition, in the uplink scheduling, the scheduling unit 204 determines the uplink logical channel input from the upper layer 208 based on the downlink control information received from the base station, the scheduling information input from the upper layer 208, and the like. Scheduling processing for mapping to the transport channel and generation of scheduling information used for uplink scheduling are performed. The scheduling information is output to the data control unit 201.

  Also, the scheduling unit 204 maps the uplink logical channel input from the higher layer 208 to the transport channel, and outputs it to the data control unit 201. The scheduling unit 204 also includes channel state information input from the channel estimation unit 205 and CRC (Cyclic Redundancy Check) parity bits (also simply referred to as CRC) input from the data extraction unit 207. The confirmation result is also output to the data control unit 201.

  In addition, the scheduling unit 204 determines a parameter related to the uplink signal, and generates an uplink signal using the determined parameter. In addition, the scheduling unit 204 determines a parameter related to the uplink reference signal, and generates an uplink reference signal using the determined parameter.

  The channel estimation unit 205 estimates a downlink channel state from a downlink reference signal (for example, a demodulation reference signal) for demodulation of the downlink signal, and outputs it to the reception data demodulation unit 206. Received data demodulation section 206 demodulates the received data input from radio section 203 and outputs the demodulated data to data extraction section 207.

  The data extraction unit 207 confirms the correctness of the reception data input from the reception data demodulation unit 206 and outputs a confirmation result (for example, ACK or NACK) to the scheduling unit 204. Further, the data extraction unit 207 separates the reception data input from the reception data demodulation unit 206 into transport channel and physical layer control data, and outputs the data to the scheduling unit 204.

  The upper layer 208 performs processing of the radio resource control layer and processing of the MAC layer. The upper layer 208 integrates and controls the processing units of the lower layer, so that the upper layer 208, the scheduling unit 204, the antenna 209, the data control unit 201, the transmission data modulation unit 202, the channel estimation unit 205, the reception data demodulation unit 206, an interface between the data extraction unit 207 and the wireless unit 203 exists.

  FIG. 3 is a schematic diagram illustrating an example of communication according to the embodiment of the present invention. In FIG. 3, terminal 303 communicates with primary base station 301 and / or secondary base station 302. In addition, the terminal 304 communicates with the primary base station 301 and / or the secondary base station 302.

  In FIG. 3, when transmitting an uplink signal to a base station, the terminal multiplexes and transmits a demodulation reference signal (DMRS) that is a known signal between the base station and the terminal. . Here, the uplink signal includes a signal of uplink data (uplink shared channel (UL-SCH; Uplink Shared Channel), uplink transport block). Further, the uplink signal includes a signal of uplink control information (UCI; Uplink Control Information). Here, UL-SCH is a transport channel.

  Here, for example, the uplink data is mapped to a physical uplink shared channel (PUSCH; Physical Up Shared Channel). Moreover, uplink control information is mapped by PUSCH or a physical uplink control channel (PUCCH; Physical Uplink Control Channel). That is, a demodulation reference signal related to PUSCH transmission (transmission on PUSCH) is supported. Further, a demodulation reference signal related to PUCCH transmission (transmission on PUCCH) is supported.

  Hereinafter, the demodulation reference signal related to PUCCH transmission is also referred to as a first reference signal. That is, the first reference signal is used for demodulation of PUCCH. For example, the first reference signal is transmitted in a resource block (also referred to as a physical resource block, a physical resource, or a resource) to which a corresponding PUCCH is mapped.

  That is, the terminal 303 multiplexes the demodulation reference signal with the uplink signal to be transmitted to the primary base station 301 and transmits the multiplexed signal through the uplink 305. Also, the terminal 303 multiplexes the demodulation reference signal with the uplink signal to be transmitted to the secondary base station 302 and transmits the multiplexed signal through the uplink 306. Also, the terminal 304 multiplexes the demodulation reference signal with the uplink signal to be transmitted to the primary base station 301 and transmits the multiplexed signal through the uplink 307. Also, the terminal 304 multiplexes the demodulation reference signal with the uplink signal to be transmitted to the secondary base station 302 and transmits the multiplexed signal through the uplink 308.

  Here, when the uplink signal transmitted by the terminal 303 and the uplink signal transmitted by the terminal 304 have the same characteristics, interference occurs. Further, when the reference signal transmitted by the terminal 303 and the demodulation reference signal transmitted by the terminal 304 have the same characteristics, interference occurs. For example, when interference occurs in a demodulation reference signal transmitted by each of a plurality of terminals, the estimation accuracy of a transmission path state used for demodulating an uplink signal is greatly degraded.

  Therefore, it is desirable to orthogonalize the uplink signal transmitted by the terminal 303 and the uplink signal transmitted by the terminal 304. Further, it is desirable to orthogonalize the demodulation reference signal transmitted by the terminal 303 and the demodulation reference signal transmitted by the terminal 304. Also, it is desirable to randomize the interference between the uplink signal transmitted by the terminal 303 and the uplink signal transmitted by the terminal 304. Also, it is desirable to randomize the interference between the demodulation reference signal transmitted by the terminal 303 and the demodulation reference signal transmitted by the terminal 304.

  Here, in FIG. 3, different physical layer cell identities (also referred to as physical layer cell identities, physical layer cell identifiers, and cell IDs) can be set for the primary base station 301 and the secondary base station 302 (Different). also called cell ID). Further, the same physical layer cell identity can be set for all or a part of the primary base station 301 and the secondary base station 302 (also referred to as Shared cell ID and Same cell ID).

  Here, in FIG. 3, aggregation of a plurality of serving cells (also simply referred to as cells) is supported in the downlink and uplink (referred to as carrier aggregation or cell aggregation). For example, in each serving cell, a transmission bandwidth of up to 110 resource blocks can be used. Here, in the carrier aggregation, one serving cell is defined as a primary cell (Pcell). In carrier aggregation, a serving cell other than the primary cell is defined as a secondary cell (Scell; Secondary Cell).

  Here, the carrier corresponding to the serving cell in the downlink is defined as a downlink component carrier (DLCC). Also, a carrier corresponding to a primary cell in the downlink is defined as a downlink primary component carrier (DLPCC; Downlink Primary Component Carrier). A carrier corresponding to a secondary cell in the downlink is defined as a downlink secondary component carrier (DLSCC).

  In addition, a carrier corresponding to a serving cell in the uplink is defined as an uplink component carrier (ULCC). Further, a carrier corresponding to a primary cell in the uplink is defined as an uplink primary component carrier (ULPCC; Uplink Primary Component Carrier). Also, a carrier corresponding to a secondary cell in the uplink is defined as an uplink secondary component carrier (ULSCCC).

  For example, the primary cell is defined as a cell in which the terminal performs an initial connection establishment procedure. Also, the primary cell is defined as a cell from which the terminal starts a connection re-establishment procedure. A primary cell is defined as a cell indicated as a primary cell by a base station during a handover procedure. For example, the base station can indicate a primary cell to a terminal using a higher layer signal.

  Further, the base station can set a plurality of serving cells in the terminal using a higher layer signal. That is, the base station can instruct the terminal to communicate with a plurality of serving cells (can instruct to communicate using carrier aggregation). Here, the base station can also set a single serving cell for the terminal. That is, the base station can instruct the terminal to communicate with a single serving cell.

  That is, the base station and the terminal can perform transmission / reception on a plurality of physical channels in a certain subframe. Here, each of the physical channels is arranged in any one serving cell. That is, a single physical channel is not arranged in multiple serving cells.

  For example, one PDSCH can be arranged in one serving cell (DLCC). Also, for example, one PUSCH can be arranged in one serving cell (ULCC). For example, a base station and a terminal can transmit and receive downlink data using a plurality of PDSCHs in a certain subframe. Also, the base station and the terminal can transmit and receive uplink data using a plurality of PUSCHs in a certain subframe. Here, for example, the PUCCH is arranged only in the primary cell.

  FIG. 4 is a diagram illustrating an example of downlink signals (downlink data signals and downlink control information signals). Here, FIG. 4 illustrates physical downlink shared channel (PDSCH) to which downlink data (downlink shared channel (DL-SCH), downlink transport block) is mapped. The resource area is shown. That is, PDSCH is used for transmission of downlink data. Here, DL-SCH is a transport channel.

  Moreover, the resource area | region of the physical downlink control channel (PDCCH; Physical Downlink Control Channel) to which downlink control information (DCI; Downlink Control Information) is mapped is shown. Moreover, the resource area | region of E-PDCCH (Enhanced-PDCCH) to which downlink control information is mapped is shown.

  For example, as shown in FIG. 4, the PDCCH is mapped to the first to third OFDM symbols in the downlink resource region. That is, the PDCCH is time-division multiplexed (TDM) with the PDSCH.

  Also, for example, the E-PDCCH is mapped to the 4th to 12th OFDM symbols in the downlink resource region. Further, the E-PDCCH is mapped to the first slot and the second slot in one subframe. That is, the E-PDCCH is frequency division multiplexed (FDM) with the PDSCH. Hereinafter, E-PDCCH is included in PDCCH.

  Here, the PDCCH is used to notify (designate) downlink control information to the terminal. A plurality of formats are supported (defined) for downlink control information transmitted on the PDCCH. Here, the format of the downlink control information is also referred to as a DCI format.

  For example, as the DCI format for the downlink, DCI format 1 and DCI format 1A used for scheduling one PDSCH (one PDSCH codeword, one downlink transport block transmission) in one cell are supported. The In addition, as a DCI format for the downlink, DCI format 2 used for scheduling of one PDSCH (up to two PDSCH codewords, up to two downlink transport blocks) in one cell is supported. The

  For example, the DCI format for the downlink includes downlink control information such as information on PDSCH resource allocation and information on MCS (Modulation and Coding scheme). Also, the DCI format for the downlink includes information on the virtual cell identity (information for indicating the virtual cell identity, information on the reference sequence index related to PUCCH, and information on the reference sequence identifier). Also good. Hereinafter, the DCI format used for PDSCH scheduling is also referred to as downlink assignment.

  Further, for example, as a DCI format for uplink, DCI format 0 used for scheduling of one PUSCH (one PUSCH codeword, one uplink transport block transmission) in one cell is supported. In addition, as a DCI format for uplink, DCI format 4 used for scheduling one PUSCH (up to two PUSCH codewords, transmission of up to two uplink transport blocks) in one cell is supported. The

  For example, the DCI format for uplink includes downlink control information such as information on PUSCH resource allocation and information on MCS (Modulation and Coding scheme). Hereinafter, the DCI format used for PUSCH scheduling is also referred to as an uplink grant.

  In FIG. 4, the terminal monitors a set of PDCCH candidates (PDCCH candidates). Here, the PDCCH candidate indicates a candidate in which the PDCCH may be arranged and transmitted by the base station. Moreover, a PDCCH candidate is comprised from one or several control channel element (CCE; Control Channel Element). In addition, monitoring means that the terminal attempts to decode each PDCCH in the set of PDCCH candidates according to all the DCI formats to be monitored. Here, the set of PDCCH candidates monitored by the terminal is also called a search space. That is, a search space is a set of resources that may be used for PDCCH transmission by a base station. Here, the search space is configured for each number of control channel elements constituting the PDCCH candidate.

  Here, the PDCCH resource area includes a common search space (CSS; common search space) and a user equipment specific search space (USS; UE-specific search space, terminal-specific (terminal-specific) search space). Configured (defined, set).

  That is, in FIG. 4, CSS and / or USS are configured in the PDCCH resource region. Also, CSS and / or USS are configured in the resource region of E-PDCCH. The terminal monitors the PDCCH in the CSS and / or USS of the PDCCH resource area, and detects the PDCCH addressed to itself. In addition, the terminal monitors the E-PDCCH in the CSS and / or USS of the E-PDCCH resource region, and detects the E-PDCCH addressed to the terminal itself.

  Here, the terminal monitors the PDCCH using CSS (or a plurality of CSSs) in only the primary cell. That is, the CSS may be arranged (configured) only in the primary cell with respect to (a certain one) terminal.

  Here, CSS is used for transmission of downlink control information to a plurality of terminals. That is, CSS is defined by resources common to a plurality of terminals. For example, the CSS is composed of CCEs having a predetermined number between the base station and the terminal. Here, CSS may be used for transmission of downlink control information to a specific terminal. That is, the base station transmits a DCI format intended for a plurality of terminals and / or a DCI format intended for a specific terminal in the CSS.

  The USS is used for transmission of downlink control information to a specific terminal. That is, USS is defined by resources dedicated to a certain terminal. That is, USS is defined independently for each terminal. For example, the USS may be configured by a CCE having a number determined based on a radio network temporary identifier (RNTI) assigned by a base station, a slot number in a radio frame, or the like. Here, RNTI indicates C-RNTI (Cell RNTI). Further, for example, the USS may be configured from a CCE notified by the base station. That is, the base station transmits a DCI format intended for a specific terminal in the USS.

  Here, RNTI assigned to the terminal by the base station is used for transmission of downlink control information (transmission on PDCCH). Specifically, a CRC (Cyclic Redundancy Check) parity bit generated based on downlink control information (which may be in a DCI format) is added to the downlink control information and added to the CRC parity bit. Is scrambled by RNTI. Here, the CRC parity bit is also referred to as a CRC code. The CRC parity bit is also referred to as CRC.

  The terminal attempts to decode the downlink control information with CRC parity bits scrambled by the RNTI, and when the received CRC matches the generated CRC, detection of the downlink control information (PDCCH) addressed to the own device Is determined to be successful (also called blind decoding). Here, RNTI indicates C-RNTI. That is, the terminal decodes the PDCCH with CRC scrambled by C-RNTI.

  Here, C-RNTI is a unique (unique) identifier used for RRC (Radio Resource Control) connection and scheduling identification. For example, C-RNTI is utilized for dynamically scheduled unicast transmissions.

  When the PDSCH resource is scheduled by the downlink control information transmitted on the PDCCH, the terminal receives the downlink data on the scheduled PDSCH. Also, when the PUSCH resource is scheduled by the downlink control information transmitted on the PDCCH, the terminal transmits uplink data and / or uplink control information on the scheduled PUSCH.

  Also, the terminal transmits uplink control information using PUCCH. Here, in the uplink control information, information indicating ACK / NACK for downlink data (downlink transport block) (information indicating ACK / NACK in Hybrid Automatic Repeat Request, ACK / NACK signal, and HARQ-ACK are also described. Included).

  Further, the uplink control information includes channel state information (CSI; Channel State Information) for downlink signals (for example, downlink transport blocks transmitted by PDSCH). Also, the uplink control information includes a scheduling request used to request UL-SCH resources for uplink data transmission (for example, initial transmission of uplink data). Here, as described above, the first reference signal is multiplexed for transmission of the uplink control information on the PUCCH.

  Hereinafter, transmission of uplink control information in PUCCH will be described. That is, the embodiments described below are applicable to transmission of information indicating ACK / NACK and / or channel state information and / or scheduling request in PUCCH.

  In addition, the base station and the terminal transmit and receive signals in an upper layer (Higher layer). For example, the base station and the terminal are also called a radio resource control signal (RRC signaling; Radio Resource Control signal, RRC message; Radio Resource Control message, RRC information; Radio Resource Control information) in the RRC layer (Layer 3). Send and receive. Here, in the RRC layer, a dedicated signal transmitted to a certain terminal by the base station is also referred to as a dedicated signal. That is, a setting (information) unique (specific) to a certain terminal is notified by a base station using a dedicated signal.

  Further, the base station and the terminal transmit and receive MAC control elements in a MAC (Media Access Control) layer (layer 2). Here, the RRC signaling and / or the MAC control element is also referred to as a higher layer signaling.

  A plurality of formats are supported (defined) for PUCCH. Here, a format supported for PUCCH (a format supported by PUCCH) is also referred to as a PUCCH format.

  For example, PUCCH format 1a is supported as the PUCCH format. For example, the terminal can transmit 1-bit uplink control information around a subframe using the PUCCH format 1a. Here, in the PUCCH format 1a, BPSK (Binary Phase Shift Keying) is supported as a modulation method.

  For example, PUCCH format 1b is supported as a PUCCH format. For example, the terminal can transmit 2-bit uplink control information around a subframe using the PUCCH format 1b. Here, in PUCCH format 1b, QPSK (Quadrature Phase Shift Keying) is supported as a modulation scheme.

  Hereinafter, transmission of uplink control information using PUCCH format 1a or PUCCH format 1b is also referred to as transmission of uplink control information using PUCCH format 1a / 1b. Moreover, PUCCH format 1a / 1b is also described as a 1st PUCCH format.

For example, the terminal corresponds to the number of the first CCE used to transmit the PDCCH (used to transmit downlink assignment) (also referred to as the lowest CCE index used to configure the PDCCH) Using the PUCCH resource (corresponding to the resource index n ^{(1, p)} _PUCCH below), uplink control information is transmitted in the PUCCH format 1a / 1b.

In addition, the terminal uses the PUCCH resource (corresponding to the following resource index n ^{(1, p)} _PUCCH ⁾ indicated by the downlink control information transmitted on the PDCCH, and uses the PUCCH format 1a / 1b in the uplink. Send control information.

  Here, the PUCCH resource indicated by the downlink control information transmitted on the PDCCH is a plurality of PUCCH resources (for example, four PUCCH resources) set by the base station using a higher layer signal. May be instructed by Moreover, the downlink control information used in order to instruct | indicate a PUCCH resource may be transmitted by PDCCH used in order to schedule PDSCH in a secondary cell.

In addition, the terminal uses the PUCCH resource (corresponding to the resource index n ^{(1, p)} _PUCCH below) set using a higher layer signal (eg, dedicated signal) and uses the PUCCH format 1a / 1b. Thus, uplink control information may be transmitted.

  FIG. 5 is a diagram for explaining an example of the structure of the PUCCH format 1a / 1b. In FIG. 5, the horizontal axis indicates the time domain, and the vertical axis indicates the frequency domain. Also, one physical resource block (PRB) composed of 7 symbols (1 slot) in the time domain and 12 subcarriers in the frequency domain is shown. Here, one subframe includes two slots (a first slot and a second slot). An area composed of one symbol and one subcarrier is also called a resource element.

As shown in FIG. 5, in the PUCCH format 1a / 1b, the uplink control information includes a sequence in which a cyclic shift is applied to a reference sequence (hereinafter also referred to as a reference signal sequence r ^(αp) _{u, ν} ). Is multiplied. For example, the uplink control information is multiplied by a reference signal sequence having a sequence length N ^PUCCH _seq = 12.

  For example, the reference signal sequence is multiplied according to Equation 1 to the modulation symbol (or complex symbol) d (0) of the uplink control information modulated by BPSK or QPSK. That is, for transmission in PUCCH format 1a / 1b, an uplink signal (uplink control information signal) is generated according to Equation 1.

Formula 1

  Here, P indicates the number of antenna ports used for transmission in the PUCCH format 1a / 1b. Details of the reference sequence and the reference signal sequence will be described later.

For example, the sequence y ^(p) (n) is repeated four times, and each of the repeated sequences is multiplied by an orthogonal sequence (for example, an orthogonal sequence having a sequence length of 4). For example, the sequence y ^(p) (n) is multiplied by the orthogonal sequence according to Equation 2. That is, an uplink signal (uplink control information signal) is generated according to Equation 2.

Formula 2

Furthermore, the sequence z ^(p) is mapped to the resources (resource elements) of the first, second, sixth and seventh SC-FDMA symbols in the physical resource block from the lower frequency.

Also, resources used for transmission in PUCCH format 1a / 1b are specified by resource index n ^{(1, p)} _PUCCH . Here, from the resource index n ^{(1, p)} _PUCCH , an orthogonal sequence index n ^(p) _OC ( _ns ) and a cyclic shift α _p ( _ns , l) are determined.

For example, resources to be used for transmission in the PUCCH format 1a / 1b is orthogonal sequence index n ^(p) _{OC (n s)} and the cyclic shift α _{p (n} s, l) resource index n which determines the ^{( 1, p)} Defined according to Equation 3 using _PUCCH . That is, an uplink signal (uplink control information signal) is generated according to Equation 3 for transmission in PUCCH format 1a / 1b.

Formula 3

Here, n ′ _P (n _s ) is determined based on the resource index n ^{(1, p)} _PUCCH . N ′ and Δ ^PUCCH _shift are determined based on information notified by the base station. That is, for example, resources used for transmission in the PUCCH format 1a / 1b are defined based on the physical resource block, the orthogonal sequence index, and the cyclic shift.

Also, in the PUCCH format 1a / 1b, a first reference signal sequence (also referred to as a _PUCCH demodulation reference signal sequence γ ^(P) _PUCCH (·)) is a sequence in which a cyclic shift is applied to a reference sequence ( Reference signal sequence). That is, the reference signal sequence is multiplied by an orthogonal sequence (for example, an orthogonal sequence W (m) having a sequence length of 3) to define a first reference signal sequence. For example, the first reference signal sequence is generated according to Equation 4.

Formula 4

Here, for example, m = 0,..., N _RS ^PUCCH −1. Also, n = 0,..., _Indicated by M _sc ^RS −1. M ′ represents the slot number in the subframe. Further, the number N _RS ^PUCCH of reference symbols per slot is defined by specifications and the like. M _sc ^RS is the length of the reference signal sequence, and is represented by, for example, M _sc ^RS = N _sc ^RB . Here, N _sc ^RB is the size of the resource block in the frequency domain allocated by the base station, and is defined by the number of subcarriers.

Further, for transmission in the PUCCH format 1a / 1b, the cyclic shift α _P ( _ns, l) applied to the first reference signal as a pair is defined by Equation 5. That is, the first reference signal is generated according to Equation 5 for transmission in PUCCH format 1a / 1b.

Formula 5

Here, n _s denotes a slot number in one radio frame. L indicates the number of the SC-FDMA symbol in one slot. Also, n ′ _P ( _ns ) is determined based on the resource index n ^{(1, p)} _PUCCH . N ′ and Δ ^PUCCH _shift are determined based on information notified by the base station. Further, the number N _RS ^PUCCH of reference symbols per slot is defined by specifications and the like. Details of the cyclic shift n _cs ^cell ( _ns, l) will be described later.

  Here, the first reference signal sequence is mapped to the resources (resource elements) of the third, fourth, and fifth SC-FDMA symbols in the physical resource block.

  Further, for example, PUCCH format 3 is supported as the PUCCH format. For example, the terminal can transmit 48-bit uplink control information around a subframe using PUCCH format 3. Here, in PUCCH format 3, QPSK is supported as a modulation scheme. Here, PUCCH format 3 is also described as a second PUCCH format.

For example, the terminal uses the PUCCH resource (corresponding to the following resource index n ^{(3, p)} _PUCCH ⁾ indicated by the downlink control information transmitted on the PDCCH, and uses the PUCCH format 3 for the uplink control information. Send.

  Here, the PUCCH resource indicated by the downlink control information transmitted on the PDCCH is a plurality of PUCCH resources (for example, four PUCCH resources) set by the base station using a higher layer signal. May be instructed by Moreover, the downlink control information used in order to instruct | indicate a PUCCH resource may be transmitted by PDCCH used in order to schedule PDSCH in a secondary cell.

In addition, the terminal uses the PUCCH resource (corresponding to the resource index n ^{(3, p)} _PUCCH below) set using a higher layer signal (for example, a dedicated signal), and in PUCCH format 3, Uplink control information may be transmitted.

  FIG. 6 is a diagram illustrating an example of the structure of PUCCH format 3. In FIG. 6, the horizontal axis indicates the time domain, and the vertical axis indicates the frequency domain. Further, one physical resource block composed of 7 symbols (1 slot) in the time domain and 12 subcarriers in the frequency domain is shown. Here, one subframe includes two slots (a first slot and a second slot).

As shown in FIG. 6, in PUCCH format 3, the uplink control information is multiplied by a cyclic shift and an orthogonal sequence. For example, with respect to modulation symbols (may be complex symbols) d (0),..., D (M _symbol −1) of uplink control information modulated by QPSK, cyclic shift n _cs ^cell ( _{ns ,} l) Is multiplied according to Equation 6. In the first slot, the orthogonal sequence W ^(p) _{noc, 0} (i) is multiplied according to Equation 6. In the second slot, the orthogonal sequence W ^(p) _{noc, 1} (i) is multiplied according to Equation 6. That is, for transmission in PUCCH format 3, an uplink signal (uplink control information signal) is generated according to Equation 6.

Formula 6

Here, it is indicated by M _symb = 2N _sc ^RB . Here, N _sc ^RB is the size of the resource block in the frequency domain allocated by the base station, and is defined by the number of subcarriers. Also, for example, it is indicated by N ^PUCCH _{SF, 0} = N ^PUCCH _{SF, 1} = 5. In addition, the orthogonal sequence W ^(p) _{noc, 0} (i) and the orthogonal sequence W ^(p) _{noc, 1} (i) are the quantity (quantity) n ^(p) _{OC, 0} and the quantity n shown in the following Expression 8. ^(p) Determined based on _{OC, 1} .

Furthermore, in PUCCH format 3, each of the sequences y ^(p) _n (i) generated according to Equation 6 is cyclically shifted according to Equation 7. That is, for transmission in PUCCH format 3, an uplink signal (uplink control information signal) is generated according to Equation 7.

Formula 7

Also, DFT (Discrete Fourier Transform) precoding processing is performed on the sequence y￣ ^(p) _n (i) generated according to Equation 7, and the first, third, fourth, fifth, and seventh in the physical resource block are performed. It is mapped to the resource (each resource element) of the th SC-FDMA symbol from the lowest frequency.

Also, resources used for transmission in PUCCH format 3 are specified by resource index n ^{(3, p)} _PUCCH . Here, quantity n ^(p) _{OC, 0} and quantity n ^(p) _{OC, 1} are generated from the resource index n ^{(3, p)} _PUCCH .

For example, the resources used for transmission in PUCCH format 3 use the resource index n ^{(3, p)} _PUCCH that generates quantity n ^(p) _{OC, 0} and quantity n ^(p) _{OC, 1.} , Defined according to Equation 8. That is, for transmission in PUCCH format 3, an uplink signal (uplink control information signal) is generated according to Equation 8.

Formula 8

  That is, for example, resources used for transmission in PUCCH format 3 are defined based on physical resource blocks and orthogonal sequence indexes.

  In PUCCH format 3, the first reference signal sequence is generated based on a sequence (reference signal sequence) in which a cyclic shift is applied to the reference sequence, as in PUCCH format 1a / 1b. That is, in PUCCH format 3, the first reference signal sequence is defined according to Equation 4.

Here, in Expression 4, the cyclic shift α _P ( _ns, l) applied to the first reference signal for transmission in the PUCCH format 3 is defined by Expression 9. That is, for transmission in PUCCH format 3, the first reference signal is generated according to Equation 9.

Formula 9

Here, n ′ _P (n _s ) is determined based on the resource index n ^{(3, p)} _PUCCH . Further, the first reference signal sequence is mapped to resources (respective resource elements) of the third, fourth, and fifth DFT-Spread OFDM symbols in the physical resource block.

  Details of the reference sequence and the reference signal sequence will be described below. As described above, the reference signal sequence is defined by the cyclic shift of the reference sequence. The reference sequence is used to generate an uplink signal (uplink control information signal) transmitted in the PUCCH format 1a / 1b. Further, the reference sequence is used for generating a first reference signal in transmission in the PUCCH format 1a / 1b. Further, the reference sequence is used for generating a first reference signal in transmission in PUCCH format 3.

For example, the reference signal sequence r ^(α) _{u, ν} is generated according to Equation 10 using the reference sequence r￣ ^(α) _{u, ν} (n).

Formula 10

That is, a plurality of reference signal sequences are defined from a single reference sequence by different cyclic shift α values. Here, M _sc ^RS is the length of the reference signal sequence, and is represented by, for example, M _sc ^RS = N _sc ^RB . Here, N _sc ^RB is the size of the resource block in the frequency domain allocated by the base station, and is defined by the number of subcarriers.

  The reference series is divided into groups. That is, the reference sequence is represented by a group number (also referred to as a sequence group number) u and a reference sequence number ν in the group. For example, the reference sequence is divided into 30 groups, and two reference sequences are included in each group. Here, for example, sequence group hopping is applied to 30 groups.

Further, only when the length of the reference signal sequence is 6N _sc ^RB or more, sequence hopping is applied to the two reference sequences in the group. Here, the length of the sequence of the first reference signal is 1 × N _sc ^RB , and sequence hopping is not applied. That is, the reference sequence number ν associated with PUCCH is always given by ν = 0.

  For example, the reference sequence is given by Equation 11. That is, the definition of the reference sequence depends on the length of the reference signal sequence.

Formula 11

Here, the q-th root Zadoff-Chu sequence x _q (m) is defined by Equation 12.

Formula 12

  Q is given by Equation 13.

Formula 13

Here, the length N _ZC ^RS of the Zadoff-Chu sequence is given by the maximum prime number satisfying N _ZC ^RS <M _sc ^RS .

Further, the sequence group number u in slot _{n s} is the group hopping pattern _f gh _{(n s)} and sequence shift pattern _{f ss,} defined according to equation 14.

Formula 14

  Here, the base station can instruct the terminal to enable or disable sequence group hopping (also referred to as group hopping). In addition, when the terminal is instructed to enable sequence group hopping by the base station, the terminal hops a group of reference signal sequences for each slot.

Here, for example, group hopping pattern _f gh _{(n s)} is given by equation 15.

Formula 15

  Here, for example, the pseudo-random sequence c (i) is defined by a gold sequence of length 31 and is given by Equation 16.

Formula 16

Here, for example, N _c = 1600. Also, the first m-sequence x ₁ is initialized by x ₁ (0) = 1, x ₁ (n) = 0, n = 1, 2,. The second m-sequence _{x 2} is initialized by Equation 17.

Formula 17

Here, c _init is defined by Equation 18. That is, the pseudo-random sequence of the group hopping pattern f _gh (n _s ) is initialized by Expression 18 (1) or Expression 18 (2).

Formula 18

Here, details of which one of Expression 18 (1) and Expression 18 (2) is used will be described later. Details of the physical layer cell identity N _ID ^cell and the parameter “X” will be described later.

  That is, the reference sequence is generated according to Equation 18. That is, an uplink signal (uplink control information signal) transmitted in the PUCCH format 1a / 1b is generated according to Equation 18. Further, the first reference signal in transmission in the PUCCH format 1a / 1b is generated according to Equation 18. Also, the first reference signal in transmission in PUCCH format 3 is generated according to Equation 18.

For PUCCH, the sequence shift pattern f _ss ^PUCCH is given by Equation 19. That is, the sequence shift pattern is initialized by Equation 19 (1) or Equation 19 (2).

Formula 19

  Here, details of which one of Equation 19 (1) and Equation 19 (2) is used will be described later.

  That is, the reference sequence is generated according to Equation 19. That is, an uplink signal (uplink control information signal) transmitted in PUCCH format 1a / 1b is generated according to Equation 19. Further, the first reference signal in the transmission in the PUCCH format 1a / 1b is generated according to Equation 19. Further, the first reference signal in transmission in PUCCH format 3 is generated according to Equation 19.

Details of the cyclic shift n _cs ^cell ( _ns, l) will be described below. As described above, the cyclic shift n _cs ^cell ( _ns, l) is used to generate an uplink signal (uplink control information signal) transmitted in the PUCCH format 1a / 1b. The cyclic shift n _cs ^cell ( _ns, l) is used to generate an uplink signal (uplink control information signal) transmitted in the PUCCH format 3. The cyclic shift n _cs ^cell ( _ns, l) is used for generating a first reference signal in transmission in the PUCCH format 1a / 1b. In addition, the cyclic shift n _cs ^cell ( _ns, l) is used for generating a first reference signal in transmission in the PUCCH format 3.

For example, the cyclic shift n _cs ^cell ( _ns, l) is defined by Equation 20. As described above, n _s indicates the slot number in one radio frame. L indicates the number of the SC-FDMA symbol in one slot. That is, the cyclic shift n _cs ^cell ( _ns, l) takes different values depending on the slot number and the SC-FDMA symbol number.

Formula 20

Here, N _sym ^UL indicates the number of SC-FDMA symbols in the uplink slot. Here, the pseudo-random sequence c (i) in Expression 20 is defined by Expression 16. The second m-sequence _{x 2} in equation 16 is initialized by Equation 17.

  That is, by using Equation 20, cyclic shift hopping is applied to the transmission of uplink control information in the PUCCH format 1a / 1b. Further, cyclic shift hopping is applied to transmission of uplink control information in PUCCH format 3.

  Further, by using Equation 20, cyclic shift hopping is applied to the transmission of the first reference signal related to the PUCCH format 1a / 1b. Also, cyclic shift hopping is applied to transmission of the first reference signal related to PUCCH format 3.

Here, for the cyclic shift n _cs ^cell ( _ns, l), c _init is defined by Equation 21. That is, the pseudo-random sequence of the cyclic shift n _cs ^cell ( _ns, l) is initialized by Expression 21 (1) or Expression 21 (2).

Formula 21

  Here, details of which one of Equation 21 (1) and Equation 21 (2) is used will be described later.

That is, the cyclic shift n _cs ^cell ( _ns, l) is generated according to Equation 21. That is, an uplink signal (uplink control information signal) transmitted in PUCCH format 1a / 1b is generated according to Equation 21. Also, an uplink signal (uplink control information signal) transmitted in PUCCH format 3 is generated according to Equation 21. Further, the first reference signal in transmission in the PUCCH format 1a / 1b is generated according to Equation 21. Further, the first reference signal in transmission in PUCCH format 3 is generated according to Equation 21.

Details of the physical layer cell identity N _ID ^cell and the parameter “X” will be described below. In the above formula, N _ID ^cell indicates a physical layer cell identity (also referred to as a physical layer cell identity).

  That is, the physical layer cell identity indicates a cell-specific (cell-specific) identity (parameter). The physical layer cell identity indicates an identity (parameter) unique to the base station (base station specific). The physical layer cell identity indicates the physical layer identity of the cell. Here, for example, the physical layer cell identity may be a physical layer cell identity corresponding to the primary cell.

  For example, the UE can detect physical layer cell identities using synchronization signals (Synchronization signals). Also, the terminal can acquire the physical layer cell identity from information included in an upper layer signal (for example, a band over command) transmitted by the base station.

  That is, the physical layer cell identity is a parameter related to PUCCH (a parameter related to generation of an uplink signal (uplink control information signal) transmitted on PUCCH). The physical layer cell identity is a parameter related to generation of an uplink signal (uplink control information signal) transmitted in the PUCCH format 1a / 1b. The physical layer cell identity is a parameter related to generation of an uplink signal (uplink control information signal) transmitted in PUCCH format 3.

  The physical layer cell identity is a parameter related to an uplink reference signal sequence (parameter related to generation of an uplink reference signal sequence). That is, the physical layer cell identity and parameters related to the first reference signal (parameters related to generation of the first reference signal sequence).

  In the above formula, the parameter “X” (the value of the parameter “X”) indicates a virtual cell identity (also referred to as a virtual cell identity). That is, the parameter “X” indicates a terminal-specific (terminal-specific) identity (parameter).

  That is, parameter “X” is a parameter related to PUCCH (a parameter related to generation of an uplink signal transmitted on PUCCH). The parameter “X” is a parameter related to the generation of an uplink signal (uplink control information signal) transmitted in the PUCCH format 1a / 1b. The parameter “X” is a parameter related to generation of an uplink signal (uplink control information signal) transmitted in the PUCCH format 3.

  The parameter “X” is a parameter related to the uplink reference signal sequence (parameter related to the generation of the uplink reference signal sequence). That is, the parameter “X” is a parameter related to the first reference signal (a parameter related to generation of the first reference signal sequence).

  Here, the base station can set the parameter “X” to the terminal using an upper layer signal. For example, the base station can set the parameter “X” to the terminal using a dedicated signal. Further, the base station may instruct the parameter “X” using downlink control information (hereinafter also referred to as information on the virtual cell identity) transmitted on the PDCCH. That is, downlink control information for indicating the parameter “X” is included in the downlink assignment.

Further, the base station sets a plurality of parameters “X” using a higher layer signal, and transmits one parameter “X” from among the set parameters “X” on the PDCCH. You may indicate using information about the identity. For example, the base station sets (X ₀ ) and (X ₁ ) as a plurality of parameters “X”, and uses information (for example, 1-bit information) related to the virtual cell identity transmitted on the PDCCH, ( X ₀ ) or (X ₁ ) can be indicated.

  Here, the information regarding the virtual cell identity may be included in the downlink assignment only when it is set by the base station. For example, the base station can set whether or not the information on the virtual cell identity is included in the downlink assignment to the terminal using an upper layer signal.

  In addition, the base station sets a downlink transmission mode (for example, a transmission mode in PDSCH) and / or an uplink transmission mode (for example, a transmission mode in PUSCH) by using a higher layer signal to It may be indicated whether information regarding the cell identity is included in the downlink assignment.

  That is, the terminal can identify that the information regarding the virtual cell identity is included in the downlink assignment only when a certain downlink transmission mode and / or uplink transmission mode is set. . Here, a specific downlink transmission mode and / or uplink transmission mode is defined in advance by specifications or the like, and can be known information between the base station and the terminal.

  Further, the base station may include information related to the virtual cell identity only in the downlink assignment transmitted in the user equipment specific search space. That is, it is assumed that the terminal includes information on the virtual cell identity only for the downlink assignment transmitted in the user equipment specific search space. That is, the terminal does not identify (ignore) the information related to the virtual cell identity (the field for the information related to the virtual cell identity) for the downlink assignment transmitted in the common search space.

  Here, a default value may be set for the parameter “X”. That is, the terminal can use the default value until the parameter “X” is set by the base station. Here, the default value is defined in advance by specifications or the like and can be known information between the base station and the terminal. For example, the default value of the parameter “X” may be a physical layer cell identity. For example, the default value of the parameter “X” may be a physical layer cell identity corresponding to the primary cell.

  FIG. 7 is a diagram illustrating an example of transmission of uplink control information (here, information indicating ACK / NACK for downlink data) by channel selection (PUCCH format 1b with channel selection) using PUCCH format 1b. .

  For example, the base station and the terminal transmit / receive uplink control information by using a table as shown in FIG. Here, the table as shown in FIG. 7 is defined in advance by specifications or the like, and can be known information between the base station and the terminal.

  For example, when a base station and a terminal transmit information indicating two ACK / NACKs according to the number of pieces of information indicating ACK / NACK, when transmitting information indicating three ACK / NACKs, The table to be used is switched when the information indicating the four ACK / NACKs is transmitted. Here, for example, the number of pieces of information indicating ACK / NACK is determined based on the number of serving cells set by the base station, the downlink transmission mode in each serving cell set by the base station, and the like.

  FIG. 7 shows, as an example, a table used when transmitting information indicating four ACK / NACKs (for example, a table representing 16 types of ACK / NACK combinations represented by 4 bits). Here, in FIG. 7, the terminal selects one PUCCH resource from a plurality of PUCCH resources allocated by the base station, and transmits 2-bit information (QPSK signal) using the selected PUCCH resource. To do. That is, PUCCH format 1b is used as the PUCCH format.

  Here, according to the information indicating the ACK / NACK for the downlink data (plural) transmitted in a certain subframe, the terminal transmits one PUCCH resource from among the multiple PUCCH resources allocated by the base station, Select (determine) the bit sequence to be transmitted on the (selected and determined) PUCCH resource.

  That is, the terminal can transmit information indicating ACK / NACK for the downlink data by transmitting the selected bit sequence (QPSK signal generated from the bit sequence) using the selected PUCCH resource. That is, information indicating ACK / NACK for downlink data is represented by the terminal by the selected PUCCH resource and the selected bit sequence.

  Here, for example, in FIG. 7, it can be defined that HARQ-ACK (0) indicates information indicating ACK / NACK for the first transport block transmitted on the PDSCH in the primary cell. Moreover, it can be defined that HARQ-ACK (1) indicates information indicating ACK / NACK for the second transport block transmitted on the PDSCH in the primary cell. Moreover, it can be defined that HARQ-ACK (2) has shown the information which shows the ACK / NACK with respect to the 1st transport block transmitted by PDSCH in a secondary cell. Further, it can be defined that HARQ-ACK (3) indicates information indicating ACK / NACK for the first transport block transmitted on the PDSCH in the secondary cell.

  For example, as shown in FIG. 7, the terminal receives ACK for the first transport block transmitted on the PDSCH in the primary cell, NACK for the second transport block transmitted on the PDSCH in the primary cell, When transmitting information indicating ACK for the first transport block transmitted on the PDSCH in the secondary cell and NACK for the second transport block transmitted on the PDSCH in the secondary cell, the base station The resource 2 is selected from the four PUCCH resources (resource 0, resource 1, resource 2, and resource 3) allocated by (1), and “00” is transmitted using the selected resource 2.

  Here, the base station can set the terminal to transmit uplink control information using PUCCH format 3 or to transmit uplink control information by channel selection using PUCCH format 1b. For example, the base station uses an upper layer signal to transmit uplink control information using PUCCH format 3 or whether to transmit uplink control information by channel selection using PUCCH format 1b. Can be set to the terminal.

  Also, for example, the terminal can transmit information indicating up to 20 ACK / NACKs to the base station using PUCCH format 3. Also, for example, the terminal can transmit information indicating up to four ACK / NACKs to the base station using channel selection using the PUCCH format 1b. That is, for example, when transmitting information indicating five or more ACK / NACKs to the base station, the terminal uses PUCCH format 3.

  Hereinafter, the uplink control information transmission method using the PUCCH format 1a / 1b is also referred to as a first transmission method. Moreover, the transmission method of the uplink control information using PUCCH format 3 is also described as a second transmission method. Moreover, the transmission method of uplink control information by channel selection using PUCCH format 1b is also described as a third transmission method. That is, the uplink control information transmission method by channel selection using PUCCH format 1b is not included in the first transmission method.

  The physical layer cell identity is also described as the first parameter. The parameter “X” is also described as a second parameter.

  FIG. 8 is a diagram illustrating this embodiment. Here, using FIG. 8, in the above formula, details of whether to use the first parameter (ie, physical layer cell identity) or the second parameter (ie, parameter “X”) Will be described.

  Here, for example, in FIG. 8, the terminal is set (instructed) by the base station to transmit uplink control information using a plurality of serving cells and PUCCH format 3. Further, in FIG. 8, the terminal detects a PDCCH with a CRC scrambled by C-RNTI.

  As shown in FIG. 8, when transmitting uplink control information for the PDSCH, the terminal instructs (schedules) the PDSCH transmission (transmission on the PDSCH) in which serving cell the downlink control information transmitted on the PDCCH. Whether to use the first parameter or to use the second parameter for transmission of uplink control information for the PDSCH is switched depending on whether the transmission is performed.

  That is, when the terminal transmits uplink control information for the PDSCH, the downlink control information transmitted on the PDCCH instructs the transmission of the PDSCH in which serving cell, in the above formula, Switching between using the first parameter and using the second parameter.

  Here, which serving cell is instructed (scheduled) to transmit PDSCH by the downlink control information transmitted on the PDCCH means that the downlink control information transmitted on the PDCCH is the downlink in the PDSCH of which serving cell. This is the same as whether or not the transmission (link schedule) of link data is instructed.

  Also, as shown in FIG. 8, when transmitting the uplink control information for the PDSCH, the terminal depends on which serving cell the downlink control information transmitted on the PDCCH instructs the transmission of the PDSCH. Thus, whether to use PUCCH format 1a / 1b or PUCCH format 3 is switched for transmission of uplink control information for the PDSCH.

Here, when transmitting uplink control information using the PUCCH format 1a / 1b, the terminal uses the PUCCH resource indicated by the resource index n ⁽¹⁾ _PUCCH . Further, when transmitting uplink control information using PUCCH format 3, the terminal uses a PUCCH resource indicated by resource index n ⁽³⁾ _PUCCH .

  That is, the terminal transmits the uplink control information using different PUCCH resources according to which serving cell the downlink control information transmitted on the PDCCH indicates the PDSCH transmission.

  Also, as shown in FIG. 8, when transmitting the uplink control information for the PDSCH, the terminal depends on which search space (common search space or user equipment specific search space) detects the PDCCH. , Whether to use the first parameter or the second parameter for transmission of the uplink control information for the PDSCH is switched.

  That is, when transmitting the uplink control information for the PDSCH, the terminal determines whether to use the first parameter or the second parameter in the above formula according to which search space the PDCCH is detected. Switch whether to use.

  Hereinafter, the processing flow in FIG. 8 will be described. As described above, the terminal generates an uplink signal (uplink control information signal) using the first parameter or the second parameter. In addition, the terminal generates the first reference signal using the first parameter or the second parameter.

  In FIG. 8, the terminal identifies (determines) whether or not downlink control information indicating transmission of one PDSCH (transmission on one PDSCH) only in the primary cell is received on one PDCCH (step 801). ). That is, the terminal identifies whether one PDCCH that schedules one PDSCH only in the primary cell (corresponding to transmission of the one PDSCH) is detected.

  Here, in the case of No in step 801, the terminal generates an uplink signal and / or a first reference signal using the second parameter (step 802). Further, in the case of No in Step 801, the terminal transmits an uplink signal using PUCCH format 3 (Step 802). Moreover, a terminal transmits the 1st reference signal relevant to PUCCH format 3, when it is No in step 801 (step 802).

  That is, when the terminal receives the downlink control information instructing transmission of one PDSCH in the secondary cell by one PDCCH, the terminal uses the second parameter, and the uplink signal and / or the first reference Generate a signal. That is, when the terminal detects a PDCCH (corresponding to transmission of the one PDSCH) instructing transmission of one PDSCH in the secondary cell, the terminal uses the second parameter to Alternatively, the first reference signal is generated.

  In addition, when the terminal receives downlink control information instructing transmission of one PDSCH in the secondary cell through one PDCCH, the terminal transmits an uplink signal using PUCCH format 3. That is, when a terminal detects a PDCCH (corresponding to transmission of one PDSCH) instructing transmission of one PDSCH in a secondary cell, the terminal transmits an uplink signal using PUCCH format 3 .

  In addition, when the terminal receives downlink control information instructing transmission of one PDSCH in the secondary cell through one PDCCH, the terminal transmits a first reference signal related to PUCCH format 3. That is, when the terminal detects a PDCCH (corresponding to transmission of the one PDSCH) instructing transmission of one PDSCH in the secondary cell, the terminal transmits a first reference signal related to PUCCH format 3 .

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell on a plurality of PDCCHs, the terminal uses the second parameter to 1 reference signal is generated.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell through a plurality of PDCCHs, the terminal transmits an uplink signal using PUCCH format 3. In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell through a plurality of PDCCHs, the terminal transmits a first reference signal related to PUCCH format 3.

  For example, if the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space, Two parameters are used to generate an uplink signal and / or a first reference signal.

  Also, for example, when the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space, and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space , PUCCH format 3 is used to transmit an uplink signal.

  Also, for example, when the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space, and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space The first reference signal related to PUCCH format 3 is transmitted.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in a plurality of secondary cells through a plurality of PDCCHs, the terminal uses the second parameter to transmit the uplink signal and / or the first The reference signal is generated.

  Also, when receiving downlink control information instructing transmission of a plurality of PDSCHs in a plurality of secondary cells on a plurality of PDCCHs, the terminal transmits an uplink signal using PUCCH format 3. Moreover, a terminal transmits the 1st reference signal relevant to PUCCH format 3, when the downlink control information which instruct | indicates transmission of several PDSCH in several secondary cells is received by several PDCCH.

  That is, when the terminal receives the downlink control information instructing the transmission of PDSCH in at least one secondary cell on the PDCCH, the terminal uses the second parameter to transmit the uplink signal and / or the first reference signal. Is generated.

  In addition, when the terminal receives downlink control information instructing transmission of PDSCH in at least one secondary cell through PDCCH, the terminal transmits an uplink signal using PUCCH format 3. In addition, when the terminal receives downlink control information instructing transmission of PDSCH in at least one secondary cell by PDCCH, the terminal transmits a first reference signal related to PUCCH format 3.

  That is, when transmitting uplink control information corresponding to transmission of PDSCH in at least one secondary cell, the terminal generates an uplink signal and / or a first reference signal using the second parameter. To do.

  In addition, when transmitting uplink control information corresponding to transmission of PDSCH in at least one secondary cell, the terminal transmits an uplink signal using PUCCH format 3. Moreover, a terminal transmits the 1st reference signal relevant to PUCCH format 3, when transmitting the uplink control information corresponding to transmission of PDSCH in an at least 1 secondary cell.

  Here, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 801; Yes), the terminal uses the first parameter or the second parameter, and the uplink signal and / Or generate a first reference signal (from step 803 onward).

  Also, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 801; Yes), the terminal transmits an uplink signal using the PUCCH format 1a / 1b (step 803). To later). When the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 801; Yes), the terminal transmits a first reference signal related to the PUCCH format 1a / 1b (step 803). To later).

  Here, the terminal identifies (determines) whether one PDCCH that schedules one PDSCH in only the primary cell is detected in the common search space or the user equipment specific search space (step 803).

  As shown in FIG. 8, in the case of USS in Step 803, the terminal generates an uplink signal and / or a first reference signal using the second parameter (Step 804). In the case of USS in Step 803, the terminal transmits an uplink signal using PUCCH format 1a / 1b (Step 804). In the case of USS in Step 803, the terminal transmits a first reference signal related to the PUCCH format 1a / 1b (Step 804).

  That is, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the user equipment specific search space, the terminal uses the second parameter to perform the uplink signal and / or the first Generate a reference signal.

  In addition, when one PDCCH that schedules one PDSCH only in the primary cell is detected in the user apparatus specific search space, the terminal transmits an uplink signal using the PUCCH format 1a / 1b. In addition, when one PDCCH that schedules one PDSCH only in the primary cell is detected in the user apparatus specific search space, the terminal transmits a first reference signal related to the PUCCH format 1a / 1b.

  That is, when transmitting uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal uses the second parameter to A link signal and / or a first reference signal is generated.

  Further, when transmitting uplink control information corresponding to transmission of PDSCH only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal uses the PUCCH format 1a / 1b, An uplink signal is transmitted. In addition, when the terminal transmits uplink control information corresponding to the PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal relates to the PUCCH format 1a / 1b. The reference signal is transmitted.

  Also, as shown in FIG. 8, in the case of CSS in step 803, the terminal generates an uplink signal and / or a first reference signal using the first parameter (step 805). In the case of CSS in step 803, the terminal transmits an uplink signal using PUCCH format 1a / 1b (step 805). In the case of CSS in step 803, the terminal transmits a first reference signal related to PUCCH format 1a / 1b (step 805).

  That is, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal uses the first parameter to perform the uplink signal and / or the first reference signal. Is generated.

  When the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal transmits an uplink signal using the PUCCH format 1a / 1b. Further, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal transmits a first reference signal related to the PUCCH format 1a / 1b.

  That is, when the terminal transmits uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the terminal uses the first parameter to transmit the uplink signal. And / or generating a first reference signal.

  Also, when transmitting uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the terminal uses the PUCCH format 1a / 1b to transmit the uplink control information. Send a signal. In addition, when the UE transmits uplink control information corresponding to the PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the first reference related to the PUCCH format 1a / 1b Send a signal.

  As described above, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe using the common search space, the terminal generates the first parameter using the first parameter. An uplink signal is transmitted using PUCCH format 1a / 1b.

  In addition, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the user apparatus specific search space, the terminal generates the second parameter using the second parameter. An uplink signal is transmitted using PUCCH format 1a / 1b.

  In addition, when a terminal detects a PDCCH that schedules transmission on PDSCH in at least one secondary cell in a certain subframe, an uplink signal generated using the second parameter is converted to PUCCH format 3. Use to send.

  That is, the terminal uses the second parameter when a PDCCH that schedules transmission on the PDSCH in at least one secondary cell is detected in the common search space and / or the user equipment specific search space in a certain subframe. The uplink signal generated in this way is transmitted using PUCCH format 3.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in a common search space in a certain subframe, the base station is generated using the first parameter. An uplink signal is received using PUCCH format 1a / 1b.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in the user equipment specific search space in a certain subframe, the base station generates the second station using the second parameter. The received uplink signal is received using PUCCH format 1a / 1b.

  In addition, in a certain subframe, when a downlink control information that schedules transmission on the PDSCH in at least one secondary cell is transmitted on the PDCCH, the base station generates an uplink generated using the second parameter. The signal is received using PUCCH format 3.

  That is, when the PDCCH that schedules transmission on the PDSCH in at least one secondary cell is arranged in the common search space and / or the user equipment specific search space in a certain subframe, the base station sets the second parameter. The uplink signal generated by using the received PUCCH format 3 is received.

  Further, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the common search space, the terminal generates the first parameter generated using the first parameter. The reference signal is transmitted. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the terminal maps the first reference signal generated using the first parameter to the resource element in the resource block allocated for transmission of the uplink control information using PUCCH format 1a / 1b. To do.

  In addition, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the user apparatus specific search space, the terminal generates the second parameter using the second parameter. A first reference signal is transmitted. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the terminal maps the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of the uplink control information using PUCCH format 1a / 1b. To do.

  Further, when a terminal detects a PDCCH that schedules transmission on PDSCH in at least one secondary cell in a certain subframe, the terminal transmits a first reference signal generated using the second parameter.

  That is, the terminal uses the second parameter when a PDCCH that schedules transmission on the PDSCH in at least one secondary cell is detected in the common search space and / or the user equipment specific search space in a certain subframe. The first reference signal generated in this way is transmitted. At this time, PUCCH format 3 is used as the PUCCH format.

  That is, the terminal maps the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of uplink control information using PUCCH format 3.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in a common search space in a certain subframe, the base station is generated using the first parameter. A first reference signal is received. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the base station transmits the first reference signal generated using the first parameter to the resource element in the resource block allocated for transmission of the uplink control information using the PUCCH format 1a / 1b. Assuming that it is mapped, a first reference signal is received.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in the user equipment specific search space in a certain subframe, the base station generates the second station using the second parameter. The received first reference signal is received. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the base station transmits the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of uplink control information using the PUCCH format 1a / 1b. Assuming that it is mapped, a first reference signal is received.

  In addition, in a certain subframe, when a downlink control information that schedules transmission on the PDSCH in at least one secondary cell is transmitted on the PDCCH, the base station generates the first parameter generated using the second parameter. The reference signal is received.

  That is, when the PDCCH that schedules transmission on the PDSCH in at least one secondary cell is arranged in the common search space and / or the user equipment specific search space in a certain subframe, the base station sets the second parameter. A first reference signal generated using the first reference signal is received. At this time, PUCCH format 3 is used as the PUCCH format.

  That is, the base station maps the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of uplink control information using PUCCH format 3. The first reference signal is received.

  FIG. 9 is a diagram illustrating this embodiment. Here, referring to FIG. 9, whether the first parameter (ie, physical layer cell identity) or the second parameter (ie, parameter “X”) is used in the above formula. Details will be described. The base station and the terminal may perform the operation described with reference to FIG. 8, or may perform the operation described with reference to FIG.

  For example, in FIG. 9, the terminal is set (instructed) by the base station to transmit uplink control information by channel selection using a plurality of serving cells and PUCCH format 1b. In FIG. 9, the terminal detects a PDCCH with a CRC scrambled by C-RNTI.

  As shown in FIG. 9, when transmitting uplink control information for PDSCH, the terminal instructs (schedules) PDSCH transmission (transmission on PDSCH) in which serving cell the downlink control information transmitted on PDCCH is transmitted. Whether to use the first parameter or to use the second parameter for transmission of uplink control information for the PDSCH is switched depending on whether the transmission is performed.

  That is, when the terminal transmits uplink control information for the PDSCH, the downlink control information transmitted on the PDCCH instructs the transmission of the PDSCH in which serving cell, in the above formula, Switching between using the first parameter and using the second parameter.

  Further, when the terminal transmits uplink control information for the PDSCH, the uplink for the PDSCH depends on which serving cell indicates that the downlink control information transmitted on the PDCCH indicates transmission of the PDSCH. For transmission of control information, switching is made between using PUCCH format 1a / 1b or channel selection using PUCCH format 1b.

  Also, as shown in FIG. 9, when transmitting uplink control information for PDSCH, the terminal depends on which search space (common search space or user equipment specific search space) has detected PDCCH. , Whether to use the first parameter or the second parameter for transmission of the uplink control information for the PDSCH is switched.

  That is, when transmitting the uplink control information for the PDSCH, the terminal determines whether to use the first parameter or the second parameter in the above formula according to which search space the PDCCH is detected. Switch whether to use.

  In addition, when transmitting uplink control information for the PDSCH, the terminal sets the PUCCH format 1a / 1b for transmission of the uplink control information for the PDSCH according to which search space the PDCCH is detected. Switching between using and channel selection using PUCCH format 1b.

  The processing flow in FIG. 9 will be described below. As described above, the terminal generates an uplink signal (uplink control information signal) using the first parameter or the second parameter. In addition, the terminal generates the first reference signal using the first parameter or the second parameter.

  In FIG. 9, the terminal identifies (determines) whether or not downlink control information instructing transmission of one PDSCH (transmission using one PDSCH) only in the primary cell is received using one PDCCH (step 901). ). That is, the terminal identifies whether one PDCCH that schedules one PDSCH only in the primary cell (corresponding to transmission of the one PDSCH) is detected.

  Here, in the case of No in Step 901, the terminal generates an uplink signal and / or an uplink signal using the second parameter (Step 902). Further, in the case of No in step 901, the terminal transmits an uplink signal using channel selection using the PUCCH format 1b (step 902). Further, in the case of No in step 901, the terminal transmits a first reference signal related to channel selection using the PUCCH format 1b (step 902).

  That is, when the terminal receives the downlink control information instructing transmission of one PDSCH in the secondary cell by one PDCCH, the terminal uses the second parameter, and the uplink signal and / or the first reference Generate a signal. That is, when the terminal detects a PDCCH (corresponding to transmission of the one PDSCH) instructing transmission of one PDSCH in the secondary cell, the terminal uses the second parameter to Alternatively, the first reference signal is generated.

  Further, when the terminal receives downlink control information instructing transmission of one PDSCH in the secondary cell through one PDCCH, the terminal transmits an uplink signal using channel selection using the PUCCH format 1b. . That is, when the terminal detects a PDCCH (corresponding to transmission of the one PDSCH) instructing transmission of one PDSCH in the secondary cell, the terminal uses uplink selection using channel selection using the PUCCH format 1b. Send a link signal.

  Further, when the terminal receives downlink control information instructing transmission of one PDSCH in the secondary cell by one PDCCH, the terminal transmits a first reference signal related to channel selection using the PUCCH format 1b. . That is, when the terminal detects a PDCCH (corresponding to transmission of the one PDSCH) instructing transmission of one PDSCH in the secondary cell, the terminal relates to channel selection using the PUCCH format 1b. Send a reference signal.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell on a plurality of PDCCHs, the terminal uses the second parameter to 1 reference signal is generated.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell on a plurality of PDCCHs, the terminal uses the channel selection using the PUCCH format 1b, and the uplink signal Send. In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in the primary cell and the secondary cell through a plurality of PDCCHs, the terminal uses a first reference signal related to channel selection using PUCCH format 1b. Send.

  For example, if the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space, Two parameters are used to generate an uplink signal and / or a first reference signal.

  Also, for example, when the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space, and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space The uplink signal is transmitted using channel selection using PUCCH format 1b.

  Also, for example, when the terminal detects one PDCCH that schedules one PDSCH in the primary cell in the common search space, and one PDCCH that schedules one PDSCH in the secondary cell in the user equipment specific search space , Transmit a first reference signal related to channel selection using PUCCH format 1b.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in a plurality of secondary cells through a plurality of PDCCHs, the terminal uses the second parameter to transmit the uplink signal and / or the first The reference signal is generated.

  In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in a plurality of secondary cells on a plurality of PDCCHs, the terminal uses the channel selection using the PUCCH format 1b to transmit an uplink signal. Send. In addition, when the terminal receives downlink control information instructing transmission of a plurality of PDSCHs in a plurality of secondary cells through a plurality of PDCCHs, the terminal transmits a first reference signal related to channel selection using the PUCCH format 1b. Send.

  That is, when the terminal receives the downlink control information instructing the transmission of PDSCH in at least one secondary cell on the PDCCH, the terminal uses the second parameter to transmit the uplink signal and / or the first reference signal. Is generated.

  In addition, when the terminal receives downlink control information instructing transmission of PDSCH in at least one secondary cell by PDCCH, the terminal transmits an uplink signal using channel selection using PUCCH format 1b. In addition, when the terminal receives downlink control information instructing transmission of PDSCH in at least one secondary cell by PDCCH, the terminal transmits a first reference signal related to channel selection using PUCCH format 1b.

  That is, when transmitting uplink control information corresponding to transmission of PDSCH in at least one secondary cell, the terminal generates an uplink signal and / or a first reference signal using the second parameter. To do.

  Further, when transmitting uplink control information corresponding to transmission of PDSCH in at least one secondary cell, the terminal transmits an uplink signal using channel selection using PUCCH format 1b. Further, when transmitting uplink control information corresponding to transmission of PDSCH in at least one secondary cell, the terminal transmits a first reference signal related to channel selection using PUCCH format 1b.

  Here, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 901; Yes), the terminal uses the first parameter or the second parameter, and the uplink signal and / Or generate a first reference signal (from step 903 onward).

  When the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 901; Yes), it uses channel selection using PUCCH format 1a / 1b or PUCCH format 1b. The uplink signal is transmitted (to step 903 and subsequent steps). When the terminal detects one PDCCH that schedules one PDSCH only in the primary cell (step 901; Yes), the terminal relates to channel selection using the PUCCH format 1a / 1b or the PUCCH format 1b. The first reference signal is transmitted (to step 903 and subsequent steps).

  Here, the terminal identifies (determines) whether one PDCCH that schedules one PDSCH only in the primary cell is detected in the common search space or the user equipment specific search space (step 903).

  As shown in FIG. 9, in the case of USS in Step 903, the terminal generates an uplink signal and / or a first reference signal using the second parameter (Step 902). In the case of USS in Step 903, the terminal transmits an uplink signal using channel selection using the PUCCH format 1b (Step 902). In the case of USS in Step 903, the terminal transmits a first reference signal related to channel selection using the PUCCH format 1b (Step 902).

  That is, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the user equipment specific search space, the terminal uses the second parameter to perform the uplink signal and / or the first Generate a reference signal.

  In addition, when one PDCCH that schedules one PDSCH only in the primary cell is detected in the user equipment specific search space, the terminal transmits an uplink signal using channel selection using the PUCCH format 1b. To do. Also, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the user equipment specific search space, the terminal transmits a first reference signal related to channel selection using the PUCCH format 1b. To do.

  That is, when transmitting uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal uses the second parameter to A link signal and / or a first reference signal is generated.

  Further, when transmitting uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal uses channel selection using PUCCH format 1b. Then, an uplink signal is transmitted. In addition, when the UE transmits uplink control information corresponding to the PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the user equipment specific search space, the terminal relates to channel selection using the PUCCH format 1b. The first reference signal to be transmitted is transmitted.

  Also, as shown in FIG. 9, in the case of CSS in step 903, the terminal generates an uplink signal and / or a first reference signal using the first parameter (step 904). In the case of CSS in Step 903, the terminal transmits an uplink signal using PUCCH format 1a / 1b (Step 904). In the case of CSS in step 903, the terminal transmits a first reference signal related to PUCCH format 1a / 1b (step 904).

  That is, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal uses the first parameter to perform the uplink signal and / or the first reference signal. Is generated.

  When the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal transmits an uplink signal using the PUCCH format 1a / 1b. Further, when the terminal detects one PDCCH that schedules one PDSCH only in the primary cell in the common search space, the terminal transmits a first reference signal related to the PUCCH format 1a / 1b.

  That is, when the terminal transmits uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the terminal uses the first parameter to transmit the uplink signal. And / or generating a first reference signal.

  Also, when transmitting uplink control information corresponding to PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the terminal uses the PUCCH format 1a / 1b to transmit the uplink control information. Send a signal. In addition, when the UE transmits uplink control information corresponding to the PDSCH transmission only in the primary cell scheduled by the PDCCH detected in the common search space, the first reference related to the PUCCH format 1a / 1b Send a signal.

  As described above, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe using the common search space, the terminal generates the first parameter using the first parameter. An uplink signal is transmitted using PUCCH format 1a / 1b.

  In addition, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the user apparatus specific search space, the terminal generates the second parameter using the second parameter. The uplink signal is transmitted by channel selection using PUCCH format 1b.

  In addition, when a terminal detects a PDCCH that schedules transmission on the PDSCH in at least one secondary cell in a certain subframe, the terminal uses an uplink signal generated using the second parameter as a PUCCH format 1b. Transmit according to the channel selection used.

  That is, the terminal uses the second parameter when a PDCCH that schedules transmission on the PDSCH in at least one secondary cell is detected in the common search space and / or the user equipment specific search space in a certain subframe. The uplink signal generated in this way is transmitted by channel selection using the PUCCH format 1b.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in a common search space in a certain subframe, the base station is generated using the first parameter. An uplink signal is received using PUCCH format 1a / 1b.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in the user equipment specific search space in a certain subframe, the base station generates the second station using the second parameter. The received uplink signal is received by channel selection using the PUCCH format 1b.

  In addition, in a certain subframe, when a downlink control information that schedules transmission on the PDSCH in at least one secondary cell is transmitted on the PDCCH, the base station generates an uplink generated using the second parameter. The signal is received by channel selection using PUCCH format 1b.

  That is, when the PDCCH that schedules transmission on the PDSCH in at least one secondary cell is arranged in the common search space and / or the user equipment specific search space in a certain subframe, the base station sets the second parameter. The uplink signal generated by use is received by channel selection using the PUCCH format 1b.

  Further, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the common search space, the terminal generates the first parameter generated using the first parameter. The reference signal is transmitted. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the terminal maps the first reference signal generated using the first parameter to the resource element in the resource block allocated for transmission of the uplink control information using PUCCH format 1a / 1b. To do.

  In addition, when a terminal detects one PDCCH that schedules transmission on one PDSCH only in a primary cell in a certain subframe in the user apparatus specific search space, the terminal generates the second parameter using the second parameter. A first reference signal is transmitted. At this time, channel selection using the PUCCH format 1b is used.

  That is, the terminal transmits the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of uplink control information by channel selection using the PUCCH format 1b. Map.

  Further, when a terminal detects a PDCCH that schedules transmission on PDSCH in at least one secondary cell in a certain subframe, the terminal transmits a first reference signal generated using the second parameter.

  That is, the terminal uses the second parameter when a PDCCH that schedules transmission on the PDSCH in at least one secondary cell is detected in the common search space and / or the user equipment specific search space in a certain subframe. The first reference signal generated in this way is transmitted. At this time, channel selection using the PUCCH format 1b is used.

  That is, the terminal transmits the first reference signal generated using the second parameter to the resource element in the resource block allocated for transmission of uplink control information by channel selection using the PUCCH format 1b. Map.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in a common search space in a certain subframe, the base station is generated using the first parameter. A first reference signal is received. At this time, the PUCCH format 1a / 1b is used as the PUCCH format.

  That is, the base station transmits the first reference signal generated using the first parameter to the resource element in the resource block allocated for transmission of the uplink control information using the PUCCH format 1a / 1b. Assuming that it is mapped, a first reference signal is received.

  In addition, when one PDCCH that schedules transmission on one PDSCH only in the primary cell is arranged in the user equipment specific search space in a certain subframe, the base station generates the second station using the second parameter. The received first reference signal is received. At this time, channel selection using the PUCCH format 1b is used.

  That is, the base station uses the first reference signal generated using the second parameter as a resource element in the resource block allocated for transmission of uplink control information by channel selection using the PUCCH format 1b. And the first reference signal is received.

  In addition, in a certain subframe, when a downlink control information that schedules transmission on the PDSCH in at least one secondary cell is transmitted on the PDCCH, the base station generates the first parameter generated using the second parameter. The reference signal is received.

  That is, when the PDCCH that schedules transmission on the PDSCH in at least one secondary cell is arranged in the common search space and / or the user equipment specific search space in a certain subframe, the base station sets the second parameter. A first reference signal generated using the first reference signal is transmitted. At this time, channel selection using the PUCCH format 1b is used.

  That is, the base station uses the first reference signal generated using the second parameter as a resource element in the resource block allocated for transmission of uplink control information by channel selection using the PUCCH format 1b. And the first reference signal is received.

  By the method as described above, the base station and the terminal can switch parameters more flexibly and transmit / receive uplink control information and uplink reference signals. Also, the base station and the terminal can switch parameters more dynamically and transmit / receive uplink control information and uplink reference signals.

  For example, the base station can perform scheduling using the common search space during a period in which the base station and the terminal perform setting in the RRC layer and reconfiguration in the RRC layer. In addition, the terminal transmits an uplink signal or an uplink reference signal using the first parameter during a period in which the base station and the terminal are performing settings in the RRC layer and reconfiguration in the RRC layer. I can do this.

  As described above, when the terminal detects a PDCCH that schedules PDSCH only in the primary cell in the common search space, the terminal generates an uplink signal or an uplink reference signal using cell-specific parameters. That is, it is possible to continue communication even during a period in which the base station and the terminal are performing the setting in the RRC layer or the re-setting in the RRC layer, and can perform communication using radio resources efficiently. it can.

  The program that operates in the primary base station, the secondary base station, and the terminal related to the present invention is a program (program that causes a computer to function) that controls the CPU and the like so as to realize the functions of the above-described embodiments related to the present invention. Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary. As a recording medium for storing the program, a semiconductor medium (for example, ROM, nonvolatile memory card, etc.), an optical recording medium (for example, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (for example, magnetic tape, Any of a flexible disk etc. may be sufficient. In addition, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also based on the instructions of the program, the processing is performed in cooperation with the operating system or other application programs. The functions of the invention may be realized.

  In the case of distribution in the market, the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet. In this case, the storage device of the server computer is also included in the present invention. Moreover, you may implement | achieve part or all of the primary base station in the embodiment as mentioned above, the secondary base station, and the terminal as LSI which is typically an integrated circuit. Here, each functional block of the primary base station, the secondary base station, and the terminal may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. It is. Moreover, it is the element described in each said embodiment, and the structure which substituted the element which has the same effect is also contained.

  The present invention is suitable for mobile station apparatuses, base station apparatuses, communication methods, wireless communication systems, and integrated circuits.

DESCRIPTION OF SYMBOLS 100 Base station 101 Data control part 102 Transmission data modulation part 103 Radio part 104 Scheduling part 105 Channel estimation part 106 Reception data demodulation part 107 Data extraction part 108 Upper layer 109 Antenna 200 Terminal 201 Data control part 202 Transmission data modulation part 203 Radio part 204 Scheduling unit 205 Channel estimation unit 206 Received data demodulation unit 207 Data extraction unit 208 Upper layer 209 Antenna 301 Primary base station 302 Secondary base station 303, 304 Terminals 305, 306, 307, 308 Uplink

Claims (18)

A mobile station device that communicates with a base station device,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to Transmitting the uplink signal generated using the first physical uplink control channel format to the base station apparatus,
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, Transmitting the uplink signal generated using the second parameter to the base station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is The mobile station apparatus transmits to the base station apparatus in a second physical uplink control channel format. A mobile station device that communicates with a base station device,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to Transmitting the uplink signal generated using the first transmission method to the base station apparatus,
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, Transmitting the uplink signal generated using the second parameter to the base station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is The mobile station apparatus transmits to the base station apparatus by the second transmission method. The mobile station apparatus according to claim 1 or 2, wherein the first parameter is a physical layer cell identity. The mobile station apparatus according to any one of claims 1 to 3, wherein the second parameter is instructed by the base station apparatus. A base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to Receiving the uplink signal generated using the mobile station apparatus in a first physical uplink control channel format;
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, Receiving the uplink signal generated using the second parameter from the mobile station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter Is received from the mobile station apparatus in the second physical uplink control channel format. A base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to Receiving the uplink signal generated using the first transmission method from the mobile station apparatus,
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, Receiving the uplink signal generated using the second parameter from the mobile station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter Is received from the mobile station apparatus by the second transmission method. The base station apparatus according to claim 5 or 6, wherein the first parameter is a physical layer cell identity. The base station apparatus according to any one of claims 5 to 7, wherein the second parameter is instructed to the mobile station apparatus. A communication method of a mobile station apparatus that communicates with a base station apparatus,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to Transmitting the uplink signal generated using the first physical uplink control channel format to the base station apparatus,
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, Transmitting the uplink signal generated using the second parameter to the base station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is And transmitting to the base station apparatus in a second physical uplink control channel format. A communication method of a mobile station apparatus that communicates with a base station apparatus,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to Transmitting the uplink signal generated using the first transmission method to the base station apparatus,
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, Transmitting the uplink signal generated using the second parameter to the base station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is And transmitting to the base station apparatus by the second transmission method. A communication method of a base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to Receiving the uplink signal generated using the mobile station apparatus in a first physical uplink control channel format;
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, Receiving the uplink signal generated using the second parameter from the mobile station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter Is received from the mobile station apparatus in the second physical uplink control channel format. A communication method of a base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to Receiving the uplink signal generated using the first transmission method from the mobile station apparatus,
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, Receiving the uplink signal generated using the second parameter from the mobile station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter Is received from the mobile station apparatus by the second transmission method. An integrated circuit mounted on a mobile station device that communicates with a base station device,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to A function of transmitting an uplink signal generated using the first physical uplink control channel format to the base station apparatus;
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, A function of transmitting the uplink signal generated using a second parameter to the base station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is A function of transmitting to the base station apparatus in the second physical uplink control channel format is provided to the mobile station apparatus. An integrated circuit mounted on a mobile station device that communicates with a base station device,
In a subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is set to A function of transmitting the uplink signal generated using the first transmission method to the base station apparatus;
In a subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, A function of transmitting the uplink signal generated using a second parameter to the base station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is detected in a subframe, the uplink signal generated using the second parameter is An integrated circuit characterized by causing the mobile station apparatus to exhibit a function of transmitting to the base station apparatus by the second transmission method. An integrated circuit mounted on a base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to A function of receiving an uplink signal generated by using the mobile station apparatus in a first physical uplink control channel format;
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, A function of receiving the uplink signal generated using a second parameter from the mobile station apparatus in the first physical uplink control channel format;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter An integrated circuit, wherein the base station device is allowed to exhibit a function of receiving the mobile station device from the mobile station device in a second physical uplink control channel format. An integrated circuit mounted on a base station device that communicates with a mobile station device,
In a certain subframe, when one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell, the first parameter is set to A function of receiving an uplink signal generated by using the mobile station device by a first transmission method;
In a certain subframe, when the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in the user equipment specific search space in the primary cell, A function of receiving the uplink signal generated using the second parameter from the mobile station apparatus by a second transmission method;
When a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell is arranged in a certain subframe, the uplink signal generated using the second parameter An integrated circuit, wherein the base station apparatus is allowed to exhibit a function of receiving the information from the mobile station apparatus by the second transmission method. A wireless communication system in which a base station device and a mobile station device communicate with each other,
The base station device
In one subframe, one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell,
In one subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in a user equipment specific search space in the primary cell,
In a subframe, arrange a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell;
The mobile station device
When the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is used. Transmitting the uplink signal generated in the first physical uplink control channel format to the base station apparatus,
When the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, the second parameter Transmitting the uplink signal generated using the first physical uplink control channel format to the base station apparatus,
When the physical downlink control channel that schedules transmission on the physical downlink shared channel in the at least one secondary cell is detected, the uplink signal generated using the second parameter is A wireless communication system, wherein the base station apparatus transmits the physical uplink control channel format of 2 to the base station apparatus. A wireless communication system in which a base station device and a mobile station device communicate with each other,
The base station device
In one subframe, one physical downlink control channel that schedules transmission on one physical downlink shared channel only in the primary cell is arranged in the common search space in the primary cell,
In one subframe, the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is arranged in a user equipment specific search space in the primary cell,
In a subframe, arrange a physical downlink control channel that schedules transmission on a physical downlink shared channel in at least one secondary cell;
The mobile station device
When the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the common search space in the primary cell, the first parameter is used. Transmitting the uplink signal generated by the first transmission method to the base station apparatus,
When the one physical downlink control channel that schedules transmission on the one physical downlink shared channel only in the primary cell is detected in the user equipment specific search space in the primary cell, the second parameter Transmitting the uplink signal generated by using the second transmission method to the base station apparatus,
If the physical downlink control channel that schedules transmission on the physical downlink shared channel in the at least one secondary cell is detected, the uplink signal generated using the second parameter is Transmitting to the base station apparatus by a second transmission method.