JP2006311411A - Communication terminal, base station device and communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce useless man-hours and to effectively use radio resources in a radio communication system for performing a high speed packet transmission in an incoming line. <P>SOLUTION: In the communication terminal, a channel decoding part 53 inspects CRC masked by an E-RNTI to information on decoding results, compares the CRC with an E-RNTI of the self-station and extracts scheduling result information to the self-station. A process control part 54 performs control of activation/inactivation about an H-ARQ process indicated by a PAF in the case of a Primary E-RNTI and performs the control of activation/inactivation to all the H-ARQ processes irrespective of the PAF in the case of a Secondary E-RNTI. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication terminal device, a base station device, and a communication method that are used in a system that performs wireless communication using HSUPA (High Speed Uplink Packet Access).

  Currently, in 3GPP, a method for enabling high-speed packet transmission on an uplink from a communication terminal device to a base station device, for example, standardization of HSUPA is being studied.

  Hereinafter, a procedure until the communication terminal apparatus performs high-speed packet transmission in HSUPA will be described with reference to FIGS. 7 and 8, the base station apparatus (NodeB) performs wireless communication with four communication terminal apparatuses (UE # 1, UE # 2, UE # 3, and UE # 4), and receives packets with HSUPA. Show the case.

  First, as step 1, each communication terminal apparatus transmits rate request information indicating a desired packet transmission rate to the base station apparatus. Note that the rate request information transmits information indicating a data amount and a transmission power ratio margin (for example, the total transmission power that can be used and the power ratio of the DPCCH).

  Next, as step 2, the base station apparatus selects a communication terminal apparatus that permits packet transmission based on rate request information and the like, and an E-DPDCH (E -DCH (Dedicated Physical Data Channel) is scheduled to determine the power ratio allowed, and information indicating the scheduling result is transmitted to the selected communication terminal device.

  There is E-AGCH (E-DCH Absolute Grant Channel) as a channel through which the base station apparatus transmits information indicating the scheduling result to the communication terminal apparatus. A CRC masked with an identifier E-RNTI (E-DCH Radio Network Temporary Identifier) is added to information transmitted by E-AGCH. There are two types of E-RNTI: Primary E-RNTI and Secondary E-RNTI. In general, the former is used as an individual E-RNTI by each communication terminal device, and the latter is used as a common E-RNTI by a plurality of communication terminal devices. Note that not all communication terminal devices are necessarily given two types, Primary E-RNTI and Secondary E-RNTI. In addition, only Primary E-RNTI or Secondary E-RNTI may be used in system operation.

  FIG. 7 illustrates a case where the base station apparatus (NodeB) transmits information to the communication terminal apparatus (UE # 3) using E-AGCH using Primary E-RNTI (X3). FIG. 8 shows a case where the base station apparatus (NodeB) transmits information to the communication terminal apparatuses (UE # 1, UE # 2) using E-AGCH using Secondary E-RNTI (Y1).

  Next, as Step 3, all communication terminal apparatuses decode the signal transmitted by E-AGCH, perform CRC confirmation using Primary E-RNTI and Secondary E-RNTI, and use either E-RNTI. If no CRC error is detected, it is determined that information is transmitted to the local station by E-AGCH. If any CRC error is detected by any E-RNTI, the information is transmitted to the local station by E-AGCH. Judge that there was no. Then, the communication terminal apparatus (UE # 3 in FIG. 7, UE # 1 and UE # 2 in FIG. 8), which has transmitted information from the base station apparatus through E-AGCH, transmits packets to the base station apparatus through E-DCH. Send data.

  Next, as step 4, the base station apparatus performs error detection processing on the packet data received on the E-DCH. If no error is detected, ACK information is displayed. If an error is detected, NACK is received. Information is transmitted to the corresponding communication terminal device. If reception of packet data has failed, Steps 3 and 4 are repeated until the maximum number of retransmissions is reached by H-ARQ (Hybrid-Automatic Request). In Step 2, a channel for transmitting UP / DOWN / HOLD called E-RGCH is used in addition to E-AGCH, but this is omitted in this specification.

Here, the information transmitted by E-AGCH includes power ratio information of a plurality of bits indicating a power ratio and a 1-bit process activation flag (hereinafter referred to as “PAF”). In Non-Patent Document 1, PAF is defined as information for controlling active / inactive of all processes or one process in H-ARQ.
3GPP, TS25.309 section 9.2.1

  In the case of Primary E-RNTI, packet data retransmitted from each communication terminal apparatus can be time-division multiplexed by making a different H-ARQ process active for each communication terminal apparatus using PAF. On the other hand, in the case of Secondary E-RNTI, since a common E-RNTI is allocated to a plurality of communication terminal apparatuses, the same scheduling result is applied to the plurality of communication terminal apparatuses, which is not suitable for time division multiplexing.

  However, in the past, since communication terminal devices are adapted to apply PAF regardless of Primary E-RNTI / Secondary E-RNTI, development of communication terminal devices and base station devices, LSI development, interconnection testing There is a problem that the number of useless man-hours increases in such tests, and radio resources are wasted in system operation.

  The present invention has been made in view of such points, and in a wireless communication system that performs high-speed packet transmission on an uplink, a communication terminal device and a base station that can reduce wasteful man-hours and effectively use wireless resources An object is to provide an apparatus and a communication method.

  The communication terminal device of the present invention receives a scheduling result information including an identifier indicating a communication terminal device permitted to transmit an uplink packet from a communication partner base station device, and a process activation flag indicating a process to be controlled. And when the identifier extracted from the received signal is the first identifier of the own terminal, controls the process indicated by the process activation flag, and when the identifier is the second identifier of the own terminal, the process activation flag Regardless of the method, a process control unit that controls all processes and a transmission unit that transmits a packet in a process permitted by the process control unit are employed.

  The base station apparatus of the present invention selects a communication terminal apparatus that permits transmission of uplink packets, and selects an identifier associated with the selected communication terminal apparatus from the identifiers stored in the memory; A PAF determination unit that generates a process activation flag indicating a process to be controlled for the communication terminal device selected by the selection unit, and the PAF determination unit generates the identifier selected by the selection unit when the identifier is the first identifier. In the case of the second identifier, a PAF switching means for switching the value of the process activation flag to a fixed value indicating that all processes are controlled is adopted.

  The communication terminal device of the present invention receives a scheduling result information including an identifier indicating a communication terminal device permitted to transmit an uplink packet from a communication partner base station device, and a process activation flag indicating a process to be controlled. And when the identifier extracted from the received signal is the first identifier of the own terminal, controls the process indicated by the process activation flag, and when the identifier is the second identifier of the own terminal, the process activation flag Determines whether or not matches a predetermined fixed value. If they match, the process control means controls all processes, and if they do not match, discards scheduling result information, and permits the process control means. And a transmission means for transmitting the packet in the processed process.

  The base station apparatus of the present invention selects a communication terminal apparatus that permits transmission of uplink packets, and selects an identifier associated with the selected communication terminal apparatus from the identifiers stored in the memory; A PAF determination unit that generates a process activation flag indicating a process to be controlled for the communication terminal device selected by the selection unit, and the PAF determination unit generates the identifier selected by the selection unit when the identifier is the first identifier. In the case of the second identifier, a PAF replacement means for replacing the process activation flag with a control signal is adopted.

  The communication terminal apparatus according to the present invention includes a receiving means for receiving scheduling result information including the identifier and the process activation flag or the control signal from the base station apparatus, and an identifier for the own station extracted from the received signal. Control the process indicated by the process activation flag in the case of the first identifier, and control all processes and extract the control signal in the case of the second identifier; And a transmission unit that transmits a packet in a process permitted by the process control unit.

  The communication method of the communication terminal apparatus according to the present invention includes scheduling result information including an identifier indicating a communication terminal apparatus that permits transmission of an uplink packet from a base station apparatus of a communication partner, and a process activation flag indicating a process to be controlled. If the identifier extracted from the received signal and the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and if the identifier extracted from the received signal is the second identifier of the own terminal, the process activation is performed. A method is adopted that includes the steps of controlling all processes regardless of the activation flag and the step of transmitting packets by a process permitted by the control.

  The communication method of the base station apparatus of the present invention includes a step of selecting a communication terminal apparatus that permits transmission of an uplink packet, and selecting an identifier associated with the selected communication terminal apparatus from the identifiers stored in the memory. And a step of generating a process activation flag indicating a process to be controlled for the selected communication terminal device, and if the selected identifier is a first identifier, leave the generated process activation flag, In the case of the second identifier, a method is adopted in which the value of the process activation flag is set to a fixed value indicating that all processes are controlled.

  The communication method of the communication terminal apparatus according to the present invention includes scheduling result information including an identifier indicating a communication terminal apparatus that permits transmission of an uplink packet from a base station apparatus of a communication partner, and a process activation flag indicating a process to be controlled. If the identifier extracted from the received signal and the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and if the identifier extracted from the received signal is the second identifier of the own terminal, the process activation is performed. It is determined whether or not the activation flag matches a predetermined fixed value. If they match, all processes are controlled. If they do not match, the scheduling result information is discarded, and the control permits And a step of transmitting a packet in the process.

  In the communication method of the present invention, a base station device selects a communication terminal device that permits transmission of an uplink packet, and when the communication terminal device is permitted to transmit, the base station device transmits an uplink packet to the base station device. A communication method for transmitting, wherein the base station apparatus selects a communication terminal apparatus that permits transmission of an uplink packet, and an identifier associated with the selected communication terminal apparatus from among identifiers stored in a memory A step of generating a process activation flag indicating a process controlled by the base station apparatus with respect to the selected communication terminal apparatus; and In the case of an identifier, the generated process activation flag is left as it is. In the case of a second identifier, the process activation flag is placed in the control signal. And receiving the scheduling result information including the identifier and the process activation flag or the control signal from the base station apparatus, and the communication terminal apparatus extracting from the received signal. Controlling the process indicated in the process activation flag when the identifier is the first identifier of the terminal, and controlling all processes when the identifier is the second identifier of the terminal; A communication terminal device transmitting a packet by a process permitted by the control.

  According to the present invention, in a wireless communication system that performs high-speed packet transmission on an uplink, the process for reading a PAF in the case of Secondary E-RNTI is reduced. It can be used for.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention.

  The base station apparatus shown in FIG. 1 has individual channel signal forming units 101-1 to 101-N corresponding to communication terminal apparatuses that perform communication, as well as E-HICH control signal forming unit 110 and E-AGCH control signal forming. A unit 120 is included.

  The individual channel signal forming units 101-1 to 101-N spread the transmission data addressed to each communication terminal device by using the spreading code assigned to each communication terminal device, whereby the individual channel addressed to each communication terminal device. Form a signal.

  On the other hand, the E-HICH control signal forming unit 110 and the E-AGCH control signal forming unit 120 transmit control information addressed to each communication terminal device when each communication terminal device transmits an uplink packet in the cell. A control signal is formed by spreading using a common spreading code in each communication terminal apparatus.

  Since the processing of each individual channel signal forming unit 101-1 to 101-N is the same, only the configuration of one individual channel signal forming unit 101-1 will be described here. The channel encoding unit 102 of the dedicated channel signal forming unit 101-1 multiplexes and encodes the pilot signal (PILOT), transmission data, and uplink transmission power control command (UL-TPC). Note that transmission data is subjected to error correction coding processing before multiplexing. The output from the channel encoding unit 102 is subjected to modulation processing by the modulation unit 103 and then output to the spreading unit 104.

  Spreading section 104 spreads the modulated signal using a spreading code specific to the communication terminal device. That is, each individual channel signal forming unit 101-1 to 101 -N performs spreading processing using different spreading codes. The signal after the diffusion processing is output to the amplification unit 105. Amplifying section 105 amplifies the power of the spread signal according to the transmission power control signal from transmission power control section 106, and outputs the amplified signal to transmission radio section 107.

  As a result, individual channel signals specific to each communication terminal apparatus formed using different spreading codes are output from the individual channel signal forming units 101-1 to 101 -N. The individual channel signal is subjected to predetermined radio processing such as analog-digital conversion and up-conversion by the transmission radio unit 107 and then transmitted via the antenna 108.

  On the other hand, the control signal forming unit 110 of E-HICH inputs the ACK / NACK addressed to each communication terminal device obtained by the error detection unit 28 to the channel encoding unit 111. Channel encoding section 111 encodes ACK / NACK addressed to each communication terminal apparatus. The output from the channel encoding unit 111 is subjected to modulation processing by the modulation unit 112 and then output to the spreading unit 113.

  The spreading unit 113 spreads the modulated signal using a spreading code common to a plurality of communication terminal devices in communication. The signal after the diffusion processing is output to the amplification unit 114. Amplifying section 114 amplifies the power of the spread signal according to the transmission power control signal from transmission power setting section 115, and outputs the amplified signal to transmission radio section 107.

  Also, in E-AGCH control signal forming unit 120, scheduling result information including PAF, power ratio information, and E-RNTI output from scheduling section 31 described later is input to channel encoding section 121. The channel encoding unit 121 encodes information obtained by adding CRC masked with E-RNTI to PAF and power ratio information. The output from the channel encoding unit 121 is subjected to modulation processing by the modulation unit 122 and then output to the spreading unit 123.

  The spreading unit 123 spreads the modulated signal using a spreading code that is common to a plurality of communication terminal apparatuses in communication. The signal after the diffusion processing is output to the amplification unit 124. Amplifying section 124 amplifies the power of the spread signal in accordance with the transmission power control signal from transmission power setting section 125, and outputs the amplified signal to transmission radio section 107.

  Thereby, control information (ACK / NACK) when each communication terminal apparatus transmits an uplink packet using a dedicated channel from the control signal forming unit 110 of E-HICH and the control signal forming unit 120 of E-AGCH. And scheduling result information) are multiplexed at a timing determined with the communication terminal apparatus, and a control signal spread using a common spreading code in the plurality of communication terminal apparatuses is output. This control signal is transmitted via the antenna 108 after being subjected to predetermined radio processing such as analog-digital conversion and up-conversion by the transmission radio unit 107. Here, an example in which one spreading code is shared by a plurality of communication terminal apparatuses has been described, but a plurality of spreading codes may be used by a plurality of communication terminal apparatuses.

  In the base station apparatus shown in FIG. 1, a signal received by the antenna 108 is input to the reception radio unit 20. The reception radio unit 20 obtains a reception baseband signal by performing predetermined radio processing such as down-conversion and analog-digital conversion on the reception signal, and obtains the reception baseband signal by the number N of communication terminal devices. 1 to 21-N. Since the processing of each of the reception processing units 21-1 to 21-N is the same, only the configuration of one reception processing unit 21-1 will be described here.

  The despreading unit 22 performs a despreading process on the received baseband signal using a spreading code corresponding to the communication terminal device, thereby extracting an individual channel signal transmitted from the communication terminal device and outputting it to the demodulation unit 23 To do. The despreading unit 22 despreads the pilot symbols and outputs them to the SIR measurement unit 29.

  The demodulator 23 demodulates the output signal of the despreader 22 and outputs the demodulated signal to the channel decoder 24. The channel decoding unit 24 performs decoding processing such as error correction decoding on the output signal of the demodulation unit 23, and extracts received data, a downlink transmission power control command (DL-TPC), and the like. Incidentally, the received data is sent to a control station which is a higher station of the base station apparatus, and DL-TPC is sent to the transmission power control unit 106.

  The SIR measurement unit 29 calculates the interference wave power from the dispersion value of the pilot symbols after despreading, calculates the ratio (SIR) between the desired wave power and the interference wave power, and displays information indicating the SIR as the TPC generation unit 30 and The data is output to the scheduling unit 31. The TPC generation unit 30 generates an uplink transmission power control command (UL-TPC) that instructs increase / decrease in uplink transmission power based on the magnitude relationship between the uplink reception SIR and the target SIR. The UL-TPC is output to the channel encoding unit 102.

  The despreading unit 25 despreads the received baseband signal with the same spreading factor as when the communication terminal apparatus spreads the uplink packet. Note that information such as the spreading factor, modulation multi-level number, and coding rate of the uplink packet is embedded and transmitted in the signal by the communication terminal device, and the base station device shown in FIG. 1 is embedded in the received data, for example. These pieces of information are extracted and notified to the despreading unit 25, the demodulation unit 26, and the channel decoding unit 27. That is, the despreading unit 25, the demodulating unit 26, and the channel decoding unit 27 are configured to be able to change the spreading factor, the modulation level, and the coding rate according to transmission parameter information from the communication terminal apparatus. .

  The demodulator 26 performs demodulation processing on the uplink packet output from the despreader 25 and outputs a demodulated signal to the channel decoder 27. The channel decoding unit 27 performs decoding processing such as error correction decoding on the demodulated signal, extracts the received packet, and outputs it to the error detection unit 28. The channel decoding unit 27 extracts rate request information and outputs it to the scheduling unit 31.

  The error detection unit 28 performs error detection on the received packet. If no error is detected, the error detection unit 28 outputs the received packet to the control station that is a higher-level station of the base station apparatus and outputs an ACK signal indicating that it has been correctly demodulated to the channel encoding unit 111. To do. On the other hand, when an error is detected, the error detection unit 28 outputs a NACK signal indicating that the demodulation has not been correctly performed to the channel encoding unit 111.

  Scheduling unit 31 determines a communication terminal apparatus that is permitted to transmit an uplink packet based on rate request information from each communication terminal apparatus, SIR, and reception power resource for the uplink packet, and transmits the uplink packet. Scheduling to determine resources (power ratio) that are sometimes allowed to be used. Then, scheduling section 31 outputs scheduling result information including E-RNTI, which is an identifier associated with the determined communication terminal apparatus, power ratio information indicating the determined power ratio, and PAF, to channel encoding section 121.

  Next, processing of the scheduling unit 31 of the base station apparatus shown in FIG. 1 will be described using the block diagram of FIG. 2 and the table diagram of FIG.

  FIG. 2 is a block diagram showing an internal configuration of the scheduling unit 31. FIG. 3 is a table showing a relationship among identifiers E-RNTI (N1 to N9), E-RNTI type (Primary or Secondary), and communication terminal device numbers (UE # 1 to UE # 6). . 3 is set and stored in the E-RNTI information storage unit 211 of FIG. 2 from the control station.

  The terminal selection unit 212 receives rate request information transmitted from the communication terminal device. The terminal selection unit 212 selects a communication terminal apparatus that permits transmission of uplink packets from among the communication terminal apparatuses that have transmitted rate request information, according to a predetermined scheduling algorithm (for example, a round robin method or a proportional fairness method). . And the terminal selection part 212 selects E-RNTI corresponding to the selected communication terminal apparatus based on the E-RNTI information table shown in FIG. 3 memorize | stored in the E-RNTI information storage part 211, PAF determination part 213, output to the power ratio determination unit 214 and the channel encoding unit 121. For example, when only the communication terminal device UE # 1 is selected, the terminal selection unit 212 outputs N1. Moreover, the terminal selection part 212 outputs N1 and N2, when communication terminal device UE # 1 and U # 2 are selected. Moreover, the terminal selection part 212 outputs N3, when communication terminal device UE # 1, U # 2, UE # 3 is selected.

  The PAF determination unit 213 determines whether it is necessary to transmit an uplink packet using all H-ARQ processes based on the rate request information transmitted from the communication terminal device selected by the terminal selection unit 212. A 1-bit PAF indicating the determination result is generated. For example, when the rate request information is higher than a predetermined threshold, the PAF determination unit 213 determines that it is necessary to transmit an uplink packet using all H-ARQ processes, and generates a “1” PAF indicating this. In other cases, it is determined that it is sufficient to transmit an uplink packet using one H-ARQ process, and a PAF of “0” indicating this is generated. Then, the PAF determination unit 213 outputs the generated PAF to the power ratio determination unit 214 and the channel encoding unit 121.

  Rate ratio information, uplink packet received power resources, SIR, E-RNTI, and PAF are input to power ratio determining section 214. The power ratio determination unit 214 predicts the reception power based on the SIR, and sets the power ratio of the uplink packet E-DPDCH transmitted by the communication terminal device selected by the terminal selection unit 212 to the D-PCCH. It is determined within the range of received power resources for use. Note that the power ratio required to transmit the same amount of data differs depending on the PAF. For example, in the case of PAF “1”, uplink packets are transmitted using all H-ARQ processes, so the power ratio is set smaller than in the case of PAF “0”. For example, when the number of H-ARQ processes is 4, it becomes 1/4. Then, power ratio determining section 214 outputs power ratio information indicating the determined power ratio to channel encoding section 121.

  As a result, E-RNTI, PAF, and power ratio information are output from the scheduling unit 31 to the channel encoding unit 121 as scheduling result information.

  Next, the configuration of the communication terminal apparatus according to the present embodiment will be described using the block diagram of FIG.

  First, the receiving system will be described. The reception radio unit 42 obtains a reception baseband signal by performing down-conversion and analog-digital conversion processing on the signal received by the antenna 41, and outputs this to the despreading units 43, 48 and 51.

  The despreading unit 43 obtains a signal addressed to its own station by performing a despreading process using a spread code for each communication terminal device. The despread signal is sequentially demodulated and decoded by the demodulating unit 44 and the channel decoding unit 45, whereby reception data and an uplink transmission power control command (UL-TPC) are obtained. The despread signal is sequentially input to the SIR measurement unit 46 and the TPC generation unit 47, whereby a downlink transmission power control command (DL-TPC) is obtained from the TPC generation unit 47.

  The despreading unit 48 extracts the despread signal by despreading the reception baseband signal output from the reception radio unit 42 using the spreading code used for E-HICH in the base station. The despread signal output from the despreader 48 is demodulated by the demodulator 49 and then input to the channel decoder 50. The channel decoding unit 50 extracts ACK / NACK addressed to the own station from the multiplexed ACK / NACK addressed to each communication terminal device. Based on this ACK / NACK, the communication terminal apparatus controls retransmission of the uplink packet.

  Further, the despreading unit 51 extracts a despread signal by despreading the reception baseband signal output from the reception radio unit 42 using the spreading code used for E-AGCH in the base station. The despread signal output from the despreader 51 is demodulated by the demodulator 52 and then input to the channel decoder 53.

  The channel decoding unit 53 decodes the output signal of the demodulation unit 52, checks the CRC masked by the E-RNTI for the information of the decoding result, and compares it with the E-RNTI of the own station, and schedules for the own station Extract result information. Specifically, the channel decoding unit 53 performs CRC confirmation using the Primary E-RNTI and the Secondary E-RNTI, and if no CRC error is detected in either one of the E-RNTIs, scheduling result information addressed to the own station If the CRC error is detected in any E-RNTI, it is determined that the scheduling result information addressed to the own station has not been transmitted on the E-AGCH. Then, the channel decoding unit 53 outputs scheduling result information addressed to the own station to the process control unit 54.

  In the case of Primary E-RNTI, the process control unit 54 controls activation / inactivation for the H-ARQ process indicated by the PAF, and in the case of Secondary E-RNTI, all the H-ARQ processes are controlled regardless of the PAF. Activation / inactivation is controlled for each, that is, whether each H-ARQ process is permitted to transmit is controlled. Then, the process control unit 54 outputs the power ratio information to the power ratio determination unit 457, and outputs process information indicating the H-ARQ process permitted to be transmitted to the transmission parameter setting unit 458.

  Next, the transmission system will be described. The communication terminal apparatus shown in FIG. 4 changes the coding rate, the modulation multi-level number, and the spreading factor for transmission packets, but does not change these parameters for other data. Specifically, a pilot signal (PILOT), a downlink signal transmission power control command (DL-TPC), and transmission data include a channel encoding unit 450 with a fixed coding rate, a modulation multi-value number, and a spreading factor, and modulation. After being sequentially processed by the unit 451 and the spreading unit 452, the spread signal is output to the amplifying unit 453.

  On the other hand, the transmission packet is first stored in the buffer 454. Based on ACK / NACK, the buffer 454 deletes the previously transmitted transmission packet if it is ACK and outputs the first transmission packet to the channel encoding unit 459. If it is NACK, the buffer 454 again transmits the previously transmitted transmission packet to the channel encoding unit 459. Output to.

  Further, the data amount of the transmission packet stored in the buffer 454 is measured by the data amount measuring unit 455, and the data amount measuring unit 455 outputs the measurement result to the power ratio determining unit 457 and the rate request selecting unit 456.

  The power ratio determination unit 457 determines the power ratio of the uplink packet E-DPDCH with respect to the DPCCH based on the power ratio information, the amount of data stored in the buffer 454, and the transmission power margin, and corresponds to the determined power ratio The rate request selection unit 456 is notified of the transmission rate to be transmitted, and the transmission parameter setting unit 458 is also notified. Here, when the transmission power resource of the communication terminal apparatus is insufficient or when the transmission data of the communication terminal apparatus is small, the power ratio determination unit 457 sets a value lower than the power ratio indicated by the power ratio information. May be set.

  The rate request selection unit 456 generates rate request information based on the transmission rate notified from the power ratio determination unit 457, the amount of data stored in the buffer 454, and the transmission power margin, and outputs the rate request information to the channel encoding unit 459. Output to. The rate request information is information indicating the transmission rate of the transmission packet desired by the communication terminal apparatus, and is represented by 1 to n (n is a natural number of 2 or more), for example.

  The transmission parameter setting unit 458 controls the read rate and read timing of the transmission packets stored in the buffer 454 based on the process information and the transmission rate notified from the power ratio determination unit 457, and at the channel encoding unit 459 The coding rate, the modulation multi-level number in the modulation unit 460, and the spreading factor in the spreading unit 461 are set, and these transmission parameters are output to the channel encoding unit 459, the modulation unit 460, and the spreading unit 461, respectively. The transmission parameter setting unit 458 sets an offset amount of transmission power when transmitting a packet based on the transmission rate, and outputs this to the transmission power control unit 463.

  Incidentally, the transmission power margin input to the power ratio determination unit 457 and the rate request selection unit 456 is set by the transmission power measurement unit 465. Specifically, the transmission power measuring unit 465 is based on the transmission power controlled by the transmission power control unit 464 according to the uplink transmission power control command (UL-TPC) and the maximum transmission power that can be transmitted by the own station. Set the transmission power margin. A transmission power control unit 463 that generates a transmission power control signal for a transmission packet is a transmission power control unit 464 that generates a transmission power control signal for other pilot signals, downlink transmission power control commands (DL-TPC) and transmission data. A transmission power control signal in which the offset set by the transmission parameter setting unit 458 is added to the control signal is generated.

  Each spread signal output from the spreader 452 and spreader 461 is independently amplified by the corresponding amplifiers 453 and 462, and then subjected to predetermined radio processing such as digital-analog conversion and up-conversion by the transmission radio unit 466. After being applied, it is transmitted via the antenna 41.

  Thus, according to the present embodiment, in the reception system of the communication terminal apparatus, the H-ARQ process indicated in the PAF is controlled in the case of Primary E-RNTI, and the PAF in the case of Secondary E-RNTI. Regardless of the case, the process for transmitting the packet can be selected so as to control all the H-ARQ processes, so that the process for reading the PAF in the case of Secondary E-RNTI can be reduced. Thereby, the man-hour concerning development and a test can be reduced.

(Embodiment 2)
In Embodiment 2, when the base station apparatus is Secondary E-RNTI, the PAF is a fixed value, and when the communication terminal apparatus is Secondary E-RNTI, the PAF does not match the fixed value, scheduling result information is displayed. The case of discarding will be described.

  The base station apparatus according to the present embodiment has the same configuration as that of the base station apparatus according to the first embodiment shown in FIG.

  FIG. 5 is a block diagram showing a configuration of the scheduling unit 31 according to the present embodiment. In the scheduling unit 31 of FIG. 5, the same reference numerals as those in FIG. The scheduling unit 31 in FIG. 5 adopts a configuration in which a PAF switching unit 501 is added to FIG.

  Terminal selection section 212 outputs E-RNTI corresponding to the selected communication terminal apparatus to PAF determination section 213, power ratio determination section 214, and PAF switching section 501. The PAF determination unit 213 outputs the generated PAF to the PAF switching unit 501.

  In the case of Secondary E-RNTI, the PAF switching unit 501 sets the PAF to a predetermined fixed value “1” regardless of the PAF generated by the PAF determining unit 213, and the power ratio determining unit 214 and the channel encoding unit. It outputs to 121.

  The communication terminal device according to the present embodiment has the same configuration as that of the communication terminal device according to the first embodiment shown in FIG. 4, and only the operation of the process control unit 54 is different.

  In the case of the present embodiment, the process control unit 54 determines whether or not the PAF matches a fixed value in the case of Secondary E-RNTI, and if it matches, the activation / activation of all H-ARQ processes. Inactivation is controlled and scheduling result information is discarded if they do not match.

  As described above, according to the present embodiment, when the base station apparatus uses the secondary E-RNTI, the PAF is set to a fixed value, and when the communication terminal apparatus uses the secondary E-RNTI, the PAF does not match the fixed value. In this case, by discarding the scheduling result information, it is possible to prevent the system from becoming unstable because packets are not transmitted based on incorrect information or an incorrect instruction from the base station. In addition, man-hours for development and testing can be reduced. Note that only the communication terminal device does not set the fixed value on the base station device side, and only discards the scheduling result information when the PAF does not match the fixed value in the case of Secondary E-RNTI. Also good. In this case, it is possible to avoid the system becoming unstable. In addition, man-hours for development and testing can be reduced.

(Embodiment 3)
In Embodiment 3, a case will be described where the base station apparatus inserts another control signal instead of the PAF in the case of Secondary E-RNTI.

  The base station apparatus according to the present embodiment has the same configuration as that of the base station apparatus according to the first embodiment shown in FIG.

  FIG. 6 is a block diagram showing a configuration of the scheduling unit 31 according to the present embodiment. In the scheduling unit 31 of FIG. 6, the same reference numerals as those in FIG. The scheduling unit 31 in FIG. 6 adopts a configuration in which a PAF replacement unit 601 is added to FIG.

  Terminal selection section 212 outputs E-RNTI corresponding to the selected communication terminal apparatus to PAF determination section 213, power ratio determination section 214, and PAF replacement section 601. The PAF determination unit 213 outputs the generated PAF to the PAF replacement unit 601.

  In the case of Secondary E-RNTI, PAF replacement section 601 replaces PAF with a control signal and outputs the control signal to power ratio determination section 214 and channel encoding section 121.

  When the control signal is input from the PAF replacement unit 601, the power ratio determination unit 214 sets the power ratio in the same manner as in the case of PAF “1”.

  The communication terminal device according to the present embodiment has the same configuration as that of the communication terminal device according to the first embodiment shown in FIG. 4, and only the operation of the process control unit 54 is different.

  In the case of the present embodiment, in the case of Secondary E-RNTI, the process control unit 54 controls activation / inactivation of all processes, and further outputs a control signal to another configuration (not shown).

  As described above, according to the present embodiment, the base station apparatus replaces the PAF with the control signal in the case of Secondary E-RNTI, and the communication terminal apparatus converts the control signal to another process in the case of Secondary E-RNTI. Since it can be used, radio resources can be used effectively and more advanced system operation can be performed.

  In each of the above embodiments, the case where the PAF is generated based on the rate request information has been described. However, the present invention has no limitation on the PAF generation standard, and the PAF is based on the throughput, the data amount, the priority, and the like. May be generated. In each of the above embodiments, the example of switching the PAF to a fixed value and the example of replacing the control signal in the case of Secondary E-RNTI have been described. However, this is because the method of using the bit at the position corresponding to the PAF is described. The name at that time may not be PAF.

  The present invention is suitable for use in a base station apparatus and a communication terminal apparatus used in a radio communication system that performs high-speed packet transmission on an uplink.

The block diagram which shows the structure of the base station apparatus which concerns on Embodiment 1 of this invention. The block diagram which shows the structure of the scheduling part which concerns on Embodiment 1 of this invention. The table figure which shows the relationship between the identifier E-RNTI which concerns on Embodiment 1 of this invention, the type of E-RNTI, and the number of a communication terminal device The block diagram which shows the structure of the communication terminal device which concerns on Embodiment 1 of this invention. The block diagram which shows the structure of the scheduling part which concerns on Embodiment 2 of this invention. The block diagram which shows the structure of the scheduling part which concerns on Embodiment 2 of this invention. Diagram for explaining the HSUPA procedure Diagram for explaining the HSUPA procedure

Explanation of symbols

31 Scheduling unit 54 Process control unit 211 E-RNTI information storage unit 212 Terminal selection unit 213 PAF determination unit 214 Power ratio determination unit 501 PAF switching unit 601 PAF replacement unit

Claims (9)

Receiving means for receiving scheduling result information including an identifier indicating a communication terminal apparatus that permits transmission of an uplink packet from a base station apparatus of a communication partner, and a process activation flag indicating a process to be controlled;
When the identifier extracted from the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and when the identifier is the second identifier of the own terminal, regardless of the process activation flag. Process control means for controlling all processes;
And a transmission means for transmitting a packet in a process permitted by the process control means. A selection means for selecting a communication terminal device that permits transmission of an uplink packet, and selecting an identifier associated with the selected communication terminal device from the identifiers stored in the memory;
PAF determination means for generating a process activation flag indicating a process to be controlled for the communication terminal device selected by the selection means;
When the identifier selected by the selection unit is the first identifier, the process activation flag generated by the PAF determination unit is left as it is. When the identifier is the second identifier, the value of the process activation flag is controlled for all processes. And a PAF switching means for switching to a fixed value indicating that. Receiving means for receiving scheduling result information including an identifier indicating a communication terminal apparatus that permits transmission of an uplink packet from a base station apparatus of a communication partner, and a process activation flag indicating a process to be controlled;
When the identifier extracted from the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and when the identifier is the second identifier of the own terminal, the process activation flag is a predetermined value. A process control means for determining whether or not it matches a fixed value and controlling all processes if they match, and discarding scheduling result information if they do not match;
And a transmission means for transmitting a packet in a process permitted by the process control means. A selection means for selecting a communication terminal device that permits transmission of an uplink packet, and selecting an identifier associated with the selected communication terminal device from the identifiers stored in the memory;
PAF determination means for generating a process activation flag indicating a process to be controlled for the communication terminal device selected by the selection means;
A PAF replacement unit that replaces the process activation flag with a control signal when the identifier selected by the selection unit is the first identifier, and keeps the process activation flag generated by the PAF determination unit; A base station apparatus comprising: Receiving means for receiving scheduling result information including the identifier and the process activation flag or the control signal from the base station apparatus according to claim 4;
When the identifier addressed to the local station extracted from the received signal is the first identifier, the process indicated by the process activation flag is controlled. When the identifier is the second identifier, all processes are controlled and Process control to extract control signals;
And a transmission means for transmitting a packet in a process permitted by the process control means. Receiving scheduling result information including an identifier indicating a communication terminal device that permits transmission of an uplink packet from a communication partner base station device, and a process activation flag indicating a process to be controlled;
When the identifier extracted from the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and when the identifier is the second identifier of the own terminal, regardless of the process activation flag. Controlling all processes;
And a step of transmitting a packet by a process permitted by the control. Selecting a communication terminal device that permits transmission of an uplink packet, and selecting an identifier associated with the selected communication terminal device from the identifiers stored in the memory;
Generating a process activation flag indicating a process to be controlled with respect to the selected communication terminal device;
If the selected identifier is the first identifier, the generated process activation flag is left as it is. If the selected identifier is the second identifier, the value of the process activation flag is set to a fixed value indicating that all processes are controlled. And a communication method for a base station apparatus. Receiving scheduling result information including an identifier indicating a communication terminal device that permits transmission of an uplink packet from a communication partner base station device, and a process activation flag indicating a process to be controlled;
When the identifier extracted from the received signal is the first identifier of the own terminal, the process indicated by the process activation flag is controlled, and when the identifier is the second identifier of the own terminal, the process activation flag is a predetermined value. Determining whether or not it matches a fixed value, and if it matches, controlling all processes, and if not matching, discarding the scheduling result information; and
And a step of transmitting a packet by a process permitted by the control. In this communication method, a base station apparatus selects a communication terminal apparatus that permits transmission of an uplink packet, and the communication terminal apparatus transmits an uplink packet to the base station apparatus when transmission is permitted. And
The base station device selects a communication terminal device that permits transmission of an uplink packet, and selects an identifier associated with the selected communication terminal device from identifiers stored in a memory;
A step of generating a process activation flag indicating a process to be controlled by the base station device with respect to the selected communication terminal device;
The base station apparatus, when the selected identifier is a first identifier, leaving the generated process activation flag, and in the case of a second identifier, replacing the process activation flag with a control signal;
The communication terminal apparatus receives the scheduling result information including the identifier and the process activation flag or the control signal from the base station apparatus;
When the identifier extracted from the received signal is the first identifier of the own terminal, the communication terminal apparatus controls the process indicated by the process activation flag, and when the identifier is the second identifier of the own terminal. The process of controlling all processes,
The communication terminal device comprises a step of transmitting a packet by a process permitted by the control.

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