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WO2015069080A1 - Procédé et appareil d'émission d'informations de commande pour communication de dispositif à dispositif - Google Patents

Procédé et appareil d'émission d'informations de commande pour communication de dispositif à dispositif Download PDF

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Publication number
WO2015069080A1
WO2015069080A1 PCT/KR2014/010760 KR2014010760W WO2015069080A1 WO 2015069080 A1 WO2015069080 A1 WO 2015069080A1 KR 2014010760 W KR2014010760 W KR 2014010760W WO 2015069080 A1 WO2015069080 A1 WO 2015069080A1
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WIPO (PCT)
Prior art keywords
terminal
channel sensing
sensing signal
resource
communication
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PCT/KR2014/010760
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English (en)
Korean (ko)
Inventor
노상민
곽용준
정경인
지형주
오진영
Original Assignee
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020140048635A external-priority patent/KR102193118B1/ko
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to US15/033,362 priority Critical patent/US10334625B2/en
Priority to ES14859528T priority patent/ES2784622T3/es
Priority to EP14859528.3A priority patent/EP3068061B1/fr
Publication of WO2015069080A1 publication Critical patent/WO2015069080A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information

Definitions

  • the present invention relates to a method and apparatus for transmitting control information for device-to-device communication, and more particularly, to a method for generating and transmitting control information required to support smooth communication between terminals performing device-to-device communication. It is about.
  • 3GPP 3 rd Generation Partnership Project
  • One of the key functions required for D2D communication in 3GPP is the support of public safety services. That is, even in an emergency (for example, natural disaster, etc.) where the network cannot provide normal service, it should be able to support LTE-based wireless communication within or between groups of police officer groups, firefighter groups, and / or government personnel groups. In such an emergency, one-to-many communication, i.e., broadcast communication, for a specific group or an entire group is more efficient than one-to-one single communication between members. 3GPP has also agreed to use broadcast communication as a D2D communication method in Rel-12 (Release-12). In addition, considering the characteristics of one-to-many communication, it is highly unlikely to apply a closed-loop physical layer feedback such as HARQ ACK / NACK.
  • the radio resource used by the transmitting terminal in D2D communication may apply one of the following two methods.
  • the first is a central resource allocation method, in which a transmitting terminal can be allocated a radio resource to be used by a specific resource allocation entity.
  • the specific resource allocating agent performs the same role as the base station of cellular communication, and when the network cannot normally provide a service, the specific terminal may perform the resource allocation function.
  • D2D communication can be performed without collision of radio resources by scheduling radio resources of each terminal in an area of the resource allocation terminal.
  • the central allocation method it is necessary to separately determine how the specific resource allocation terminal is selected, and the terminal performing resource allocation must support the same function as the base station, thereby increasing the burden on the terminal complexity.
  • coordination information between resource allocation terminals is needed to prevent resource allocation collision of the terminals in the adjacent region.
  • the coordination information may be transmitted and received using a wired network, but for the exchange of the coordination information between the resource allocation terminals, a separate physical channel or signal should be defined.
  • a transmitting terminal can select a radio resource to be used by itself.
  • the process of selecting a radio resource by the transmitting terminal may be generally performed through a channel sense multiple access / collision avoidance (CSMA / CA) scheme. That is, the transmitting terminal performs channel sensing on a radio resource region configured for D2D communication, and confirms whether the corresponding radio resource is currently used for D2D communication of another terminal. If it is determined that the corresponding radio resource is occupied by another terminal, the transmitting terminal continuously performs channel sensing without using the corresponding radio resource to search for available radio resources. If it is determined that the radio resource is empty, the transmitting terminal may transmit its own signal using the radio resource.
  • CSMA / CA channel sense multiple access / collision avoidance
  • the transmitting terminal using the radio resource essentially transmits a channel sensing signal for notifying other terminals performing channel sensing that the resource is in use.
  • the channel sensing signal may have a sequence-based signal structure similar to a random access preamble or a reference signal.
  • channel sensing continues for a randomly selected back-off time for each terminal. As a result, if the channel sensing signal transmitted from another terminal is not detected and the corresponding radio resource is determined to be empty, the terminal starts transmission, otherwise, the terminal stops back-off.
  • Resource information used by the transmitting terminal for data transmission may be transmitted in a scheduling assignment (SA) signal.
  • receiving terminals may identify the resource to which the data of the transmitting terminal is transmitted by receiving the SA, and perform data reception on the corresponding resource.
  • SA scheduling assignment
  • a resource region through which UEs can transmit and receive SAs may be preset.
  • the setting of the resource region through which the terminals can transmit and receive SA may be known to each terminal through system information or higher signaling for each terminal from the base station, or may be set as a predetermined resource region and stored in each terminal memory.
  • the SA transmit / receive resource region may be configured to have at least one time / frequency magnitude and periodically exist according to a setting.
  • a data transmission / reception resource region associated with a corresponding SA transmission / reception resource region may be located after the SA transmission / reception resource region in time.
  • Each transmitting terminal may select which resource to transmit its SA within the aforementioned SA transmit / receive resource region.
  • the first method of sharing data resources through the SA is that the SA resource of each transmitting terminal and the data resource are indirectly associated by a predetermined rule, and when the receiving terminal decodes the SA, the corresponding resource is located from the resource position of the corresponding SA. It is to know the resource location of the data associated with the SA.
  • a second method of sharing data resources through the SA is that the SA of each transmitting terminal directly informs the data resource associated with the SA, and when the receiving terminal decodes the SA, the data associated with the SA from the data resource information of the corresponding SA It is to know the location of the resource.
  • the present invention is derived to transmit the control information necessary to support efficient D2D communication in the D2D communication environment of the distributed resource allocation scheme as described above without introducing additional signaling, thereby designing a signal for transmitting the necessary control information. It provides a D2D communication method and apparatus using the necessary control information, including.
  • the present invention is derived to efficiently support the data resource sharing between the transmitting and receiving terminals through the SA in the D2D communication environment of the distributed resource allocation scheme as described above, the signal design for transmitting the necessary data resource information It provides a method and apparatus for D2D communication using the necessary data resource information, including.
  • a method for communication between terminals of a transmitting terminal comprising: determining whether transmission data corresponds to final transmission data; When the transmission data is final transmission data, generating a first channel sensing signal including information indicating that the transmission data is final transmission; And transmitting the transmission data and the first channel sensing signal.
  • the transmission data when the transmission data is not the final transmission data, generating a second channel sensing signal including information indicating that the transmission data is not the final transmission data; And transmitting the transmission data and the second channel sensing signal.
  • determining whether the transmission data is a voice service When the transmission data is a voice service, generating a third channel sensing signal including information indicating that the transmission data is a voice service; And transmitting the transmission data and the third channel sensing signal.
  • determining whether the transmission data is a data service determining whether the transmission data is a data service; Generating a fourth channel sensing signal including information indicating that the transmission data is a data service when the transmission data is a data service and the transmission data is not final transmission data; And transmitting the transmission data and the fourth channel sensing signal.
  • the terminal to terminal communication method for achieving the above object, the channel sensing including information indicating whether the received data received from the transmitting terminal corresponds to the last transmission data of the transmitting terminal Detecting a signal; Determining whether a next communication resource is available using the channel sensing signal; And transmitting data and channel sensing signals when the next communication resource is available.
  • the transmitting may include setting a random back-off time when a next communication resource is available; Performing channel sensing during the backoff time; And after the channel sensing, when the next communication resource is available, transmitting data and a channel sensing signal.
  • the determining of whether the next communication resource is available may include: detecting a channel sensing signal including information indicating whether the received data received from the transmitting terminal is a voice service or a data service; And when the received data is a voice service, determining that the next communication resource is available.
  • the method may further include detecting transport block size (TBS) information of the received data by using the channel sensing signal.
  • TBS transport block size
  • the terminal to the terminal communication method for achieving the above object, generating a channel sensing signal including the decoding-related information of the transmission packet; And transmitting the transmission packet and the channel sensing signal.
  • the generating of the channel sensing signal may include: determining whether a transmission packet is an initial transmission packet; If the transmission packet is an initial transmission packet, generating a first channel sensing signal including information indicating that the transmission packet is an initial transmission packet; It may include.
  • the generating of the channel sensing signal may include: generating a second channel sensing signal including information indicating that the transmission packet is not an initial transmission packet when the transmission packet is not an initial transmission packet; It may further include.
  • the first channel sensing signal may further include information on a modulation and coding scheme (MCS) used by the transmitting terminal.
  • MCS modulation and coding scheme
  • the generating of the channel sensing signal may include generating the channel sensing signal including incremental redundancy (IR) version information of the transmission packet.
  • IR incremental redundancy
  • the terminal to the communication method of the receiving terminal for achieving the above object comprises the steps of: detecting a channel sensing signal including the decoding related information of the received packet received from the transmitting terminal; And decoding the received packet by using the channel sensing signal.
  • the decoding may include: detecting a channel sensing signal including information indicating whether the received packet received from the transmitting terminal corresponds to an initial transport packet; Determining whether the received packet corresponds to an initial transport packet using the channel sensing signal; And if the received packet is an initial transport packet, performing decoding on the received packet and subsequent consecutive packets.
  • the decoding may further include omitting decoding of the received packet when the received packet is not an initial transport packet.
  • the decoding may include: detecting a channel sensing signal including IR version information of the received packet received from the transmitting terminal; And decoding the received packet by using the IR version information.
  • the terminal to terminal communication method for achieving the above object, generating a channel sensing signal including resource allocation information; And transmitting the channel sensing signal and data with a transmission resource having a size according to the resource allocation information.
  • the resource size of the channel sensing signal may be equal to the size of the transmission resource.
  • the channel sensing signal may include information about the size of the transmission resource.
  • the terminal-to-terminal communication method of the receiving terminal for achieving the above object, the step of detecting a channel sensing signal from the transmitting terminal using a preset resource allocation condition; And detecting the transmission resource size of the transmitting terminal using the preset resource allocation condition when the channel sensing signal detection is successful.
  • the preset resource allocation condition may be that the resource size of the channel sensing signal is the same as the size of the transmission resource.
  • the preset resource allocation condition may be the size of the transmission resource.
  • a transmitting terminal that supports communication between terminals according to an embodiment of the present invention for achieving the above object, Communication unit for communicating with other terminals; And determining whether the transmission data correspond to the final transmission data, and when the transmission data is the final transmission data, generate a first channel sensing signal including information indicating that the transmission data is the final transmission, and transmit the transmission data. And a control unit which controls to transmit the first channel sensing signal.
  • the reception terminal for supporting the terminal-to-terminal communication for achieving the above object, Communication unit for communicating with other terminals; And detecting a channel sensing signal including information indicating whether the received data received from the transmitting terminal corresponds to the final transmission data of the transmitting terminal, and determining whether the next communication resource is available using the channel sensing signal,
  • the controller may control to transmit data and a channel sensing signal when the next communication resource is available.
  • a transmitting terminal that supports communication between terminals according to an embodiment of the present invention for achieving the above object, Communication unit for communicating with other terminals; And determining whether the transmission packet is the initial transmission packet, and when the transmission packet is the initial transmission packet, generates a first channel sensing signal including information indicating that the transmission packet is the initial transmission packet, and And a controller configured to control to transmit the first channel sensing signal.
  • the reception terminal for supporting the terminal-to-terminal communication for achieving the above object, Communication unit for communicating with other terminals; And detecting a channel sensing signal including information indicating whether a received packet received from a transmitting terminal corresponds to an initial transmission packet, and determining whether the received packet corresponds to an initial transmission packet using the channel sensing signal. If the received packet is an initial transport packet, the controller may control to perform decoding on the received packet and subsequent packets.
  • a transmitting terminal that supports communication between terminals according to an embodiment of the present invention for achieving the above object, Communication unit for communicating with other terminals; And a controller configured to generate a channel sensing signal including resource allocation information and to transmit the channel sensing signal and data with a transmission resource having a size corresponding to the resource allocation information.
  • the reception terminal for supporting the terminal-to-terminal communication for achieving the above object, Communication unit for communicating with other terminals; And detecting a channel sensing signal from the transmitting terminal by using a preset resource allocation condition, and detecting the transmission resource size of the transmitting terminal by using the preset resource allocation condition when the channel sensing signal is successfully detected.
  • the control unit may include.
  • the terminal to the communication method of the terminal according to an embodiment of the present invention for achieving the above object continues transmitting and receiving resources of the next SA signal of the resource to be used for the transmission and reception of the scheduling assignment (SA) signal Generating an SA signal including information on whether to occupy; And transmitting the SA signal.
  • SA scheduling assignment
  • the terminal to terminal communication method for achieving the above object, the SA signal from the transmitting terminal through the energy sensing of the transmission and reception resources of the scheduling assignment (SA) signal Receiving; Detecting information on whether the transmitting terminal occupies a transmittable resource of a next SA signal of a transmittable resource of the SA signal included in the SA signal; And determining whether a resource capable of transmitting / receiving the next SA signal is available using the detected resource.
  • SA scheduling assignment
  • receiving the SA signal may include receiving the SA signal through SA monitoring.
  • FIG. 1 is a diagram illustrating an example of channel sensing signal design according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a D2D communication method when a channel sensing signal includes final transmission information according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating a D2D communication method when a channel sensing signal includes service type and final transmission information according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a D2D communication method when a channel sensing signal includes transport packet classification information according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a D2D communication method in another case in which a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a D2D communication method when a channel sensing signal includes transport packet classification information and MCS information according to an embodiment of the present invention.
  • FIG. 7 illustrates an example of a frame structure when a channel sensing signal includes transmission frequency resource information according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating another example of a frame structure when a channel sensing signal includes transmission frequency resource information according to an embodiment of the present invention.
  • FIG. 9 is a diagram illustrating an operation procedure of a transmitting terminal when a channel sensing signal includes final transmission information according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating an operation procedure of a receiving terminal requiring data transmission when a channel sensing signal includes final transmission information in accordance with one embodiment of the present invention.
  • FIG. 11 illustrates an operation procedure of a transmitting terminal when a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating an operation procedure of a receiving terminal when a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • FIG. 13 illustrates a block diagram of a D2D transmitting and receiving terminal according to an embodiment of the present invention.
  • FIG. 14 is a diagram for describing a D2D communication method when a scheduling assignment (SA) signal includes resource occupation information according to an embodiment of the present invention.
  • the 3GPP LTE standard will be the main target, but the main subject matter of the present invention does not significantly depart from the scope of the present invention in other communication systems having a similar technical background and channel form. It can be applied with a slight modification in the range that is not, and it will be possible to judge by those skilled in the art of the present invention.
  • the channel sensing signal may be designed to have a sequence shape. This is to perform channel sensing in a relatively simple manner by taking sequence correlation.
  • control information may be informed through a method as in the following embodiment.
  • the first method is to set up a sequence set including the necessary number of sequences to represent control information, and to map each sequence in the sequence set with one control information value. Therefore, the receiving terminal can recognize the control information value indicated by the sequence by determining which sequence in the set sequence set the detected channel sensing signal sequence.
  • the second method is to introduce a variable corresponding to the control information into the input variable of the generation function used when generating the sequence.
  • LTE uplink demodulation reference signal (DM RS) generation equation will be described as an example.
  • Equation 1 shows the LTE uplink DM RS generation equation.
  • RB resource block
  • one RB is defined as 12 subcarriers, and since the subcarrier spacing is 15 kHz, the size of the frequency domain occupied by one RB becomes 180 kHz.
  • the basic unit of resource allocation in LTE uses this RB. remind The value may not have a length beyond the uplink channel bandwidth.
  • ZC Zadoff-Chu
  • the above-described cyclic shift value ⁇ and the base sequence group index u value may be used as variables corresponding to the control information.
  • the cyclic shift value Corresponds to '0' May correspond to '1'.
  • N is a specific cyclic shift value within the range of nonzero cyclic shift values.
  • the cyclic shift values can be divided into two groups to correspond to '0' for one group and '1' for another group.
  • the base sequence group index u may be divided into two groups, and each group may correspond to '0' and '1'.
  • the control information state value may be expressed by a combination of the two variables. In the above example, two control information state values are assumed, but it can be extended to use the aforementioned input variables to represent more control information state values.
  • Equation 2 shows a random access preamble sequence generation equation.
  • control information may be informed by using a root ZC sequence index u, a cyclic shift value C v , or a combination thereof as a variable corresponding to the control information.
  • the receiving terminal When the receiving terminal detects the channel sensing signal, the receiving terminal performs correlation on sequences that can be generated using the above-described method, and determines that control information state values corresponding to the sequence having the largest correlation value are received. Can be recognized.
  • values that the input variables may have may be limited to the number necessary for expressing control information status.
  • a channel sensing signal transmission method for D2D communication generating a channel sensing signal to be transmitted by the terminal based on the control information related to the D2D communication; Transmitting the generated channel sensing signal; And receiving, by a receiving terminal, a channel sensing signal and recognizing corresponding D2D communication related control information.
  • the control information related to the D2D communication includes at least one of the following information.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication-related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal recognizes when the current transmitting terminal will empty resources from the channel sensing signal And performing channel sensing and signal transmission when the transmitting terminal empties the corresponding resource.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal is the service type and the last transmission terminal transmitted from the current channel sensing signal And recognizing whether to transmit or not, and performing channel sensing and signal transmission when the transmitting terminal empties the corresponding resource.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal recognizes the service type transmitted by the current transmitting terminal from the channel sensing signal And indirectly recognizing the size of information transmitted based on the service type.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for the D2D communication, the receiving terminal recognizes the resource setting currently used by the transmitting terminal from the channel sensing signal And performing channel sensing and signal transmission when the transmitting terminal does not use the corresponding resource.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for the D2D communication, the receiving terminal from the channel sensing signal to the initial transmission packet and the non-initial Recognizing transmission packet classification information, the reception terminal determines whether there is a packet that has not been normally received, and when there is a packet that has not been normally received, decoding of the remaining packets from the corresponding transmission terminal is not performed. If there is no packet, decoding the remaining packet from the corresponding transmission terminal is included.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal is an IR (Incremental Redundancy) of the packet currently received from the channel sensing signal Recognizing version classification information and utilizing the decoding for decoding.
  • the receiving terminal is an IR (Incremental Redundancy) of the packet currently received from the channel sensing signal Recognizing version classification information and utilizing the decoding for decoding.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal is information on the frequency resources used by the transmitting terminal from the channel sensing signal Recognizing a step comprising the step of decoding the signal of the transmitting terminal by the receiving terminal.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication, the receiving terminal recognizes the information on the priority of the transmitting terminal from the channel sensing signal Comprising the receiving terminal compares its priority.
  • An embodiment of the present invention for achieving the above technical problem is an operation according to the D2D communication related information recognition of the channel sensing signal receiving terminal for D2D communication
  • the receiving terminal is a modulation and coding scheme used by the transmitting terminal from the channel sensing signal ( Recognizing a Modulation and Coding Scheme (MCS), the receiving terminal decodes the transmitting terminal signal.
  • MCS Modulation and Coding Scheme
  • the terminal is a communication method between the terminals, the resource currently used for transmission of the corresponding SA in the scheduling assignment (SA) signal transmission and reception of the next SA Information indicating whether to continue to be used in the available resource zone or information indicating whether to continue to be used until several SA transmission and reception resource zone cycles may be included.
  • SA scheduling assignment
  • the receiving UEs can know whether the resources occupied by the received SAs are still being used when the next SA transmit / receive resource region appears from the currently received SAs. The information can be used when selecting.
  • the terminal to transmit the SA in a certain SA transmitting and receiving resources can determine their SA transmittable resources through energy sensing or SA monitoring, and at this time, energy sensing Must be performed before the corresponding SA transmit / receive resource region.
  • the UE may attempt to receive an SA signal in a SA transmit / receive resource.
  • the terminal to transmit the SA performs energy sensing for the data transmission / reception area before the SA transmission / reception resource area.
  • the result can be used to select one's own SA transmission resources.
  • channel sensing may be performed on the previous SA transmit / receive resource region instead of the data region. And whether the resources occupied for data will be used in this SA transmit / receive resource region is not known exactly.
  • At least one specific value of the data resource related information value included in the SA May inform that the resource to which the corresponding SA is assigned and the data resource are related by a predetermined rule. That is, through the SA, both an direct indication method and an indirect indication method can be applied.
  • FIG. 1 is a diagram illustrating an example of channel sensing signal design according to an embodiment of the present invention.
  • the frame structure assumes an uplink case of LTE.
  • one subframe 100 has a length of 1 ms and is divided into two slots, that is, slot 0 (101) and slot 1 (102).
  • Each slot consists of seven SC-FDMA symbols (103).
  • the first SC-FDMA symbol and the last SC-FDMA symbol of a subframe are used as a guard period (GP).
  • GP guard period
  • This is a protection period for switching the transmission / reception operation of the UE in consideration of the case of using a half-duplex method in D2D communication.
  • a reference signal for demodulation that is, a DM RS (Demodulation Reference Signal) is transmitted to the SC-FDMA symbol in the center of each slot over a frequency domain used by the terminal.
  • DM RS Demodulation Reference Signal
  • the first example shown in (a) of FIG. 1 illustrates a case of using a channel sensing signal having a preamble or RS structure different from that of the DM RS.
  • the channel sensing signal 104 may be transmitted in an SC-FDMA symbol immediately after the guard interval of slot 0.
  • a channel sensing signal having a separate preamble or RS structure different from that of the DM RS is used, and the channel sensing signal 105 is divided between the guard interval of the slot 0 and the DM RS. It can transmit over an SC-FDMA symbol.
  • the channel sensing signal 105 is designed to have an independent preamble or RS sequence for each SC-FDMA symbol or to have a length such that one preamble or RS sequence is transmitted over two SC-FDMA symbols. Can be configured.
  • the second example shown in FIG. 1B may be used to include a plurality of control information in a channel sensing signal.
  • a channel sensing signal sequence of one SC-FDMA symbol is used to indicate a service type of data that is currently transmitted together, and the channel sensing signal sequence of another SC-FDMA symbol is a priority of the current transmitting terminal.
  • a channel sensing signal interval is configured over two SC-FDMA symbols.
  • the channel sensing signal interval is not necessarily limited to two SC-FDMA symbols, and various control information combinations may be transmitted through a plurality of SC-FDMA symbols according to embodiments.
  • the third example shown in (c) of FIG. 1 illustrates a structure in which the channel sensing signal 106 is used as a DM RS.
  • the channel sensing signal 106 becomes a DM RS sequence located at the center of slot 0 and slot 1.
  • the receiving terminal detects a channel sensing signal
  • the receiving terminal performs correlation on the available DM RS sequence, determines that a control information state value corresponding to the sequence having the largest correlation value is received, and determines the channel state based on the sequence. It is estimated and used for demodulating the received signal.
  • the sequence of the DM RS in slot 0 and the DM RS in slot 1 may be used to inform different control information.
  • the third example may affect the decoding performance of the receiving terminal.
  • SC-FDMA symbol position and number of the channel sensing signal is not limited to the above example, it can be transmitted to any position of slot 0 and slot 1 according to the embodiment.
  • FIG. 2 is a diagram illustrating a D2D communication method when a channel sensing signal includes final transmission information according to an embodiment of the present invention.
  • Channel sensing signal sequence 1 (200) means that the subframe currently sent by the transmitting terminal is the last transmission subframe.
  • channel sensing signal sequence 2 (201) means that the subframe currently transmitted by the transmitting terminal is not the final transmission subframe but data will be transmitted in subsequent subframes.
  • D2D UEs transmit data in the entire configured D2D communication resource frequency domain.
  • the first example of FIG. 2 illustrates a method of D2D communication when UEs A, B, and C (corresponding to UEs A, B, and C on the drawing) use data services through D2D communication.
  • UE A uses D2D communication resources first, and that UEs A, B, and C all have data to transmit.
  • the terminal A when using the data service, transmits data to be transmitted in a continuous subframe.
  • the terminal A may send the channel sensing signal sequence 1 (200) together when the last subframe is transmitted among successive subframes, thereby informing other terminals that the subframe does not use it.
  • UE A may also inform other UEs that it will use the next subframe by sending channel sensing signal sequence 2 201 to other subframes other than the last subframe.
  • other terminals performing channel sensing that is, terminal B and terminal C
  • the UEs having data to be transmitted may monitor the corresponding D2D communication resource during the back-off period from the end of the subframe in which the channel sensing signal sequence 1 200 is detected. If it is determined that the resource is empty, the terminal transmits data to the resource.
  • the length of the back-off interval may be randomly set at every back-off for each terminal in order to provide fair data transmission opportunities to the terminals. In this case, the length of the back-off interval may be smaller than a subframe unit, a subframe unit, or a plurality of subframe units.
  • the terminal C since the terminal C has a smaller back-off interval length than the terminal B at the end of the terminal A transmission, the terminal C transmits data before the terminal B.
  • the second example of FIG. 2 illustrates a method of D2D communication when terminals A, B, and C (corresponding to UEs A, B, and C on the drawing) use voice service through D2D communication. At this time, it is assumed that UE A uses D2D communication resources.
  • a configuration of a resource to be used by each terminal is determined by a semi-persistent scheduling scheme. For example, when the terminal A transmits voice data in one subframe, the terminal A uses the subframe after the period time set for the terminal A. Therefore, in the case of the voice service, since a terminal uses a subframe at a specific period instead of using a consecutive subframe, other terminals may use subframes between the periods.
  • the terminal A transmits its voice data through one subframe together with the channel sensing signal sequence 1 (200).
  • the reason for using the channel sensing signal sequence 1 (200) is that the voice data transmitted from the terminal A uses a subframe without using a continuous subframe as shown in the first example of FIG. It is not used.
  • Terminals B and C detect the channel sensing signal sequence 1 (200), recognize that the next subframe is not used, and perform random back-off and voice data transmission similarly to the first example of FIG. .
  • the terminal C since the terminal C has a smaller back-off interval length than the terminal B at the end of the terminal A transmission, the terminal C transmits data before the terminal B.
  • the terminal A can transmit its own voice data through a subframe with the channel sensing signal sequence 1 (200).
  • the length of the back-off section length is randomly set at the end of the transmission of the terminal A.
  • the length of the back-off section of the terminal B is smaller than the length of the back-off section of the terminal C. Will be sent.
  • some resource settings for voice service support may be defined in advance, and other terminals may be notified of which of the resource settings is used as a channel sensing signal sequence.
  • the other terminals can reduce the collision problem between transmitting terminal resources by transmitting their signals to other resources avoiding the expected resources. You can.
  • the method of the present embodiment may be applied even in a situation where the data service and the voice service are mixed.
  • the maximum number of subframes that can be continuously transmitted during data service may be limited in advance so as to be smaller than the subframe period set for the voice service.
  • FIG. 3 is a diagram illustrating a D2D communication method when a channel sensing signal includes service type and final transmission information according to an embodiment of the present invention.
  • channel sensing signal sequence 1 means that the subframe currently sent by the transmitting terminal is a voice service.
  • channel sensing signal sequence 2 (301) means that the subframe currently sent by the transmitting terminal is a data service.
  • channel sensing signal sequence 3 (303) indicates that the subframe sent by the current transmitting terminal is the last transmitting subframe.
  • D2D UEs transmit data in the entire configured D2D communication resource frequency domain.
  • the first example of FIG. 3 illustrates a D2D communication method when UEs A, B, and C (corresponding to UEs A, B, and C on the drawing) use data services through D2D communication.
  • UE A uses D2D communication resources first, and that UEs A, B, and C all have data to transmit.
  • This example is almost similar to the first example of FIG. 2 described above, and the operations of terminals A, B, and C are also almost similar.
  • one difference is that, if the subframe transmitted by the UE is not the last subframe, the channel sensing signal sequence transmitted together in the corresponding subframe not only indicates that a continuous subframe is used but is also transmitted in the current subframe. It tells you the service type of the data.
  • This method may be useful when the QoS required for each service is different. For example, since QoS for voice service and data service are different, a transport block size (TBS) to be transmitted may be defined differently for each service.
  • TBS transport block size
  • the receiving terminal may indirectly know from the channel sensing signal sequence indicating the service type without any other control information channel or signal indicating the TBS of the data currently being received.
  • the terminal A transmits data to be transmitted in a continuous subframe.
  • the terminal A may also send the channel sensing signal sequence 3 (302) together when transmitting the last subframe of the consecutive subframes to inform other terminals that the subframe does not use itself.
  • channel sensing signal sequence 2 301 is transmitted to inform other terminals (ie, terminal B and terminal C) that the subframe currently transmitted by the transmitting terminal A is a data service. have.
  • the length of the back-off interval is randomly set, and thus, the terminal C has a smaller length of the back-off interval than the terminal B, so that the terminal C transmits data before the terminal B. Done. Since a detailed description thereof has been described with reference to FIG. 2, detailed description thereof will be omitted.
  • the second example of FIG. 3 illustrates a D2D communication method when terminals A, B, and C (corresponding to UEs A, B, and C on the drawing) use voice service as D2D communication.
  • UE A uses D2D communication resources first, and that UEs A, B, and C all have data to transmit.
  • This example is almost similar to the second example of FIG. 2 described above, and the operations of terminals A, B, and C are also almost similar.
  • the channel sensing signal sequence does not indicate whether the terminal is the last subframe, but rather that the subframe sent by the UE is the voice service type.
  • the information indicating that the voice service type may transmit two pieces of indirect information to the receiving terminal. One is the information that the current transmitting terminal will not use consecutive subframes, and the other is the TBS information of the voice data currently received as described above.
  • the method of the present embodiment may be applied even in a situation where the data service and the voice service are mixed.
  • the maximum number of subframes that can be continuously transmitted during data service may be limited in advance so as to be smaller than the subframe period set for the voice service.
  • FIG. 4 is a diagram illustrating a D2D communication method when a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • channel sensing signal sequence 1 400 indicates that a packet currently transmitted by a transmitting terminal is initial transmission.
  • channel sensing signal sequence 2 (401) means that the packet currently sent by the transmitting terminal is not the initial transmission.
  • D2D UEs transmit data in the entire configured D2D communication resource frequency domain.
  • the first example of FIG. 4 is a case in which UE B (corresponding to UE B on the drawing) newly participates in a D2D communication group, or currently transmits UE A (corresponding to UE A on the drawing). Shows the operation of UE B in a situation where UE B does not detect a previously transmitted packet.
  • Terminal B may receive from the second packet transmitted by the terminal A as shown in the first example of FIG.
  • the terminal B may receive the channel sensing signal sequence 2 (401) together with the second packet transmitted by the terminal A.
  • the terminal B can recognize that the currently received packet is not the initial transmission by detecting the channel sensing signal sequence 2 (401). Since channel sensing signal sequence 2 401 indicates that there is a packet that has already been lost before the packet received by terminal B, terminal B does not decode the packet from which channel sensing signal sequence 2 401 is detected. Do not.
  • the second example of FIG. 4 illustrates an operation of UE B in a situation where UE B (corresponding to UE B on the drawing) can fully detect packets transmitted by the current transmission UE A (corresponding to UE A on the drawing) in this embodiment. Will be shown.
  • the terminal B can receive from the first packet transmitted by the terminal A.
  • the terminal B may receive the channel sensing signal sequence 1 (400) together with the first packet transmitted by the terminal A.
  • the terminal B can recognize that the currently received packet is the initial transmission by detecting the channel sensing signal sequence 1 (400). Since channel sensing signal sequence 1 400 indicates that no packet is lost, terminal B decodes a packet from which channel sensing signal sequence 2 401 is detected.
  • the entire terminal when all transmission packets are completely decoded in the data service, the entire terminal can be decoded properly, and thus the receiving terminal recognizes whether a packet loss has occurred without introducing a channel for transmitting separate control information and performs unnecessary decoding operation. It has the effect of not doing it.
  • FIG. 5 is a diagram illustrating a D2D communication method in another case in which a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • N channel sensing signal sequences are defined.
  • N 4.
  • channel sensing signal sequence 1 (500) means that the current subframe transmits IR version 1
  • channel sensing signal sequence 2 (501) is IR version 1
  • channel sensing signal sequence 3 (502) is IR version 2
  • channel sensing signal sequence 4 (503) means to transmit the IR version 3.
  • D2D UEs transmit data in the entire configured D2D communication resource frequency domain.
  • UE A when UE A (corresponding to UE A in the drawing) transmits its own data, it may transmit different IR versions in each subframe over four consecutive subframes rather than in one subframe. .
  • the receiving terminal may check which IR version the subframe currently received includes channel sensing signal sequence detection and decode the corresponding packet in consideration of the IR version.
  • decoding of a reception terminal when bundling a plurality of IR versions into consecutive subframes to guarantee reception detection performance in an environment in which closed loop feedback such as HARQ ACK / NACK cannot be used as described above, decoding of a reception terminal is performed.
  • the control information useful for this can be provided without introducing a separate control channel.
  • FIG. 6 is a diagram illustrating a D2D communication method when a channel sensing signal includes transport packet classification information and MCS information according to an embodiment of the present invention.
  • channel sensing signal sequence 1 means that the packet transmitted by the current transmitting terminal is initial transmission
  • channel sensing signal sequence 2 means that the packet transmitted by the current transmitting terminal is not initial transmission
  • channel sensing signal sequence 1 '602 means MCS level
  • channel sensing signal sequence 2' 603 means MCS level 1.
  • D2D UEs transmit data to the entire configured D2D communication resource frequency domain, and have two available MCS levels.
  • UE B receives from the first packet transmitted by UE A (corresponding to UE A on the drawing), and at this time, detects channel sensing signal sequence 1 (600). It can be seen that no packets are lost.
  • the terminal B detects the channel sensing signal sequence 1 '602 and recognizes that the MCS level of the currently received packet is 0, and may perform decoding in consideration of this.
  • the terminal B decodes the subframe in which the channel sensing signal sequence 2 '601 is detected in the signal received from the terminal A on the assumption that the MCS level of the packet indicated by the channel sensing signal sequence 2' 603 is 1. Can be done.
  • MCS level 0 is used for an initial transmission subframe and MCS level 1 is used for subsequent transmission subframes.
  • the present invention is not limited thereto, and MCS levels 0 and 1 may be used without limitation in any subframe.
  • the terminal B when the packet received by the terminal B is not the packet transmitted by the terminal A for the first time, the terminal B receives the channel sensing signal sequence 2 (601). It can be seen that there is already a lost packet before the received packet. Accordingly, the terminal B may not perform decoding on the packet in which the channel sensing signal sequence 2 (601) is detected later.
  • the plurality of types of control information may be informed by using a channel sensing signal sequence without introducing a plurality of separate control channels to inform the receiving terminal of a plurality of types of control information.
  • FIG. 7 illustrates an example of a frame structure when a channel sensing signal includes transmission frequency resource information according to an embodiment of the present invention.
  • a plurality of UEs divide and use the D2D communication frequency resource set in a subframe in a frequency division multiplex (FDM) scheme.
  • FDM frequency division multiplex
  • the first N SC-FDMA symbol intervals 700 in a subframe may be used as a channel sensing signal region.
  • the size of the frequency resource occupied by the channel sensing signal is the same as the size of the frequency resource used for data transmission of the transmitting terminal. That is, when the terminal is configured to transmit data in one frequency resource size of one, two, or four RB as described above, the channel sensing signal also, the length of the sequence occupies one, two, or four RB in frequency It is designed to have a length. Therefore, in this embodiment, the channel sensing signal informs the data transmission frequency resource through the length of a specific sequence.
  • the receiving terminal attempts to detect the channel sensing signal area blindly. If it is assumed that three UEs A, B, and C are FDM in one subframe and occupy 1, 2, and 4 RBs as shown in FIG. 7, the receiving UE is channel sensing with a channel sensing sequence 701 having a length of 1 RB. By performing correlation on the signal region, the channel sensing signal of the terminal A can be detected. At this time, the receiving terminal may recognize that the data of the terminal A is transmitted in the 1 RB size region based on the detected RB position. Also, the receiving terminal may correlate the channel sensing signal region with a 2RB length channel sensing sequence 702 and detect the channel sensing signal of the terminal B.
  • the receiving terminal may recognize that data of the terminal B is transmitted in a 2 RB size region based on the detected RB position. Similarly, the receiving terminal may correlate the channel sensing signal region with a 4RB length channel sensing sequence 703 and recognize the channel sensing signal of the terminal C and the corresponding data transmission frequency resource.
  • This embodiment has an effect of informing the frequency resource allocation information from the channel sensing signal without introducing a control channel for the separate frequency resource allocation information.
  • FIG. 8 is a diagram illustrating another example of a frame structure when a channel sensing signal includes transmission frequency resource information according to an embodiment of the present invention.
  • a plurality of terminals divide the D2D communication frequency resource set in the subframe by the FDM scheme.
  • the number of consecutive RBs that can be used by the UE is set to 1, 2, or 4, and each UE can transmit data using a frequency resource having a size according to one of these three settings.
  • the first N SC-FDMA symbol intervals 800 in the subframe may be used as the channel sensing signal region.
  • the frequency resource sizes occupied by the channel sensing signal are all constant.
  • three channel sensing signal sequences 1, 2, and 3 are defined.
  • channel sensing signal sequence 1 801 means that transmission data of a corresponding UE occupies 1RB
  • channel sensing signal sequence 2 802 means that transmission data of a corresponding UE occupies 2RB
  • channel sensing signal sequence 3 (803) means that the transmission data of the terminal occupies 4RB.
  • the receiving terminal attempts to blindly detect the channel sensing signal region. If it is assumed that three UEs A, B, and C are FDM in one subframe and occupy 1, 2, and 4 RBs, respectively, as shown in FIG. 8, the receiving UE receives a channel sensing signal region in channel sensing sequence 1 801. By taking correlation with respect to the channel sensing signal of the terminal A can be detected. At this time, the receiving terminal may recognize that the data of the terminal A is transmitted in the 1 RB size region based on the detected RB position. In addition, the receiving terminal may correlate the channel sensing signal region with channel sensing sequence 2 (802) and detect the channel sensing signal of the terminal B.
  • channel sensing sequence 2 802
  • the receiving terminal may recognize that data of the terminal B is transmitted in a 2 RB size region based on the detected RB position. Similarly, the receiving terminal may correlate the channel sensing signal region with channel sensing sequence 3 (803) and recognize the channel sensing signal of the terminal C and the corresponding data transmission frequency resource.
  • This embodiment has the effect of informing the frequency resource allocation information from the channel sensing signal without introducing a control channel for the separate frequency resource allocation information.
  • FIG. 9 is a diagram illustrating an operation procedure of a transmitting terminal when a channel sensing signal includes final transmission information according to an embodiment of the present invention.
  • the transmitting terminal determines whether the currently transmitted subframe is the last data transmission. If the currently transmitted subframe is the last data transmission, in step 901, the transmitting terminal may generate a channel sensing signal indicating the last data transmission. However, if it is determined in step 900 that the current transmission subframe is not the last data transmission, in step 902, the transmitting terminal may generate a channel sensing signal indicating that the last data transmission is not used, that is, that a continuous subframe will be used. . After generating the channel sensing signal in step 901 or step 902, the transmitting terminal can transmit the generated channel sensing signal with the data in step 903.
  • FIG. 10 is a diagram illustrating an operation procedure of a receiving terminal requiring data transmission when a channel sensing signal includes final transmission information in accordance with one embodiment of the present invention.
  • a receiving terminal that needs data transmission attempts to detect a channel sensing signal by performing channel sensing. Based on the result of detecting the channel sensing signal received from the current transmitting terminal in step 1001, the receiving terminal may determine whether the next resource, that is, the next subframe, is available. If the next resource is determined to be available, the receiving terminal performs random back-off from the end of the current subframe in step 1002 to perform channel sensing for a randomly set back-off time. Thereafter, if it is determined in step 1003 that the corresponding resource is available as a result of channel sensing, the receiving terminal may transmit its channel sensing signal together with the data in step 1004.
  • step 1001 If it is determined in step 1001 that the next resource usage is not possible as a result of the channel sensing signal detection, the receiving terminal may return to step 1000 to perform channel sensing. In addition, if it is determined in step 1003 that the corresponding resource is not available as a result of the random back-off, the receiving terminal may return to step 1000 to perform channel sensing.
  • FIG. 11 illustrates an operation procedure of a transmitting terminal when a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • the transmitting terminal determines whether a packet currently transmitted by the terminal is initial transmission. If the current transmission packet is the initial transmission packet, in step 1101, the transmitting terminal may generate a channel sensing signal indicating that the initial transmission packet. However, if it is determined in step 1110 that the current transmission packet is not the initial transmission packet, in step 1102 the transmitting terminal may generate a channel sensing signal indicating that the initial transmission packet is not. After generating the channel sensing signal in step 1101 or step 1102, the transmitting terminal can transmit data and the generated channel sensing signal together in step 1103.
  • FIG. 12 is a diagram illustrating an operation procedure of a receiving terminal when a channel sensing signal includes transmission packet classification information according to an embodiment of the present invention.
  • the receiving terminal attempts to detect a channel sensing signal by performing channel sensing in step 1200. Based on the result of detecting the channel sensing signal currently received from the transmitting terminal, in step 1201, the receiving terminal may determine whether the corresponding received packet is the initial transmission. If it is determined that the initial transmission is not lost, the receiving terminal may perform decoding on the initial transmission and subsequent consecutive packets currently received in step 1202. However, if it is determined in step 1201 that the currently received packet is not the initial transmission, there is a lost packet. Therefore, the receiving terminal does not decode the currently received packet and subsequent packets, and returns to step 1200. Performs channel sensing.
  • FIG. 13 illustrates a block diagram of a D2D transmitting and receiving terminal according to an embodiment of the present invention.
  • FIG. 13A is a diagram illustrating an example of a block diagram of a transmitting terminal
  • FIG. 13B is a diagram illustrating an example of a block diagram of a receiving terminal.
  • the transmitting terminal may include a control unit 1300 and a communication unit 1302.
  • the control unit 1300 of the transmitting terminal controls the transmitting terminal to perform any one of the above-described embodiments.
  • the control unit 1300 of the transmitting terminal sets the control information for the current data transmission.
  • the control unit 1300 may generate a channel sensing signal sequence based on the control information.
  • the transmitting terminal 1300 may further include a channel sensing signal generation unit 1301.
  • the channel sensing signal generation unit 1301 may generate a channel sensing signal sequence based on the control information of the control unit 1300.
  • the communication unit 1302 of the transmitting terminal transmits and receives a signal according to any one of the above-described embodiments.
  • the communication unit 1302 may multiply the generated channel sensing signal sequence into a channel sensing signal transmission resource and multiplex the data channel generated based on the control information.
  • the communication unit 1302 may include a D2D transmission unit 1302 according to an embodiment.
  • the D2D transmitter 1302 may multiplex the generated channel sensing signal sequence on a channel sensing signal transmission resource with the data channel generated based on the control information and transmit the same.
  • the receiving terminal may include a control unit 1305 and communication units 1303 and 1307.
  • the communication unit may include a D2D receiver 1303 and a D2D transmitter 1307.
  • the control unit 1305 of the receiving terminal controls the receiving terminal to perform any one of the above-described embodiments.
  • the controller 1305 controls the D2D receiver 1303 to receive a D2D signal transmitted by a transmitting terminal, separates a channel sensing signal, detects a channel sensing signal, and based on the D2D signal.
  • the receiver 1303 may control to correctly decode the received data.
  • the control unit 1305 generates a channel sensing signal sequence and the D2D transmitter controls the multiplexing of the generated channel sensing signal sequence to the channel sensing signal transmission resource and transmits the data channel generated based on the control information. Can be.
  • the communication units 1303 and 1307 of the receiving terminal transmit and receive signals according to any one of the above-described embodiments.
  • the communication unit may receive a D2D signal transmitted by a transmitting terminal, and may multiplex the generated channel sensing signal sequence with a data sensing channel based on the control information by loading the generated channel sensing signal sequence into a channel sensing signal transmission resource. have.
  • the receiving terminal may further include a channel sensing signal detection unit 1304 and a channel sensing signal generation unit 1306 separately from the control unit 1305.
  • the D2D receiving unit 1303 of the receiving terminal receives the D2D signal transmitted by the transmitting terminal to separate the channel sensing signal.
  • the channel sensing signal detection unit 1304 may detect the channel sensing signal and transfer control information obtained as a result to the control unit 1305.
  • the controller 1305 controls the D2D receiver 1303 to correctly decode the received data based on the control information.
  • the control unit 1305 determines whether to transmit data based on control information obtained from the channel sensing signal detection unit 1304, and transmits appropriate data and channel sensing signal.
  • the channel sensing signal generation unit 1306 and the D2D transmission unit 1307 may be controlled to accomplish the above. Thereafter, the channel sensing signal generator 1306 generates a channel sensing signal sequence based on the control information, and the D2D transmitter 1307 loads the generated channel sensing signal sequence into a channel sensing signal transmission resource based on the control information. It can be multiplexed with the generated data channel and transmitted.
  • FIG. 14 is a diagram for describing a D2D communication method when a scheduling assignment (SA) signal includes resource occupation information according to an embodiment of the present invention.
  • the horizontal direction refers to the time domain and the vertical direction refers to the frequency domain.
  • FIG. 14 (a) is a diagram illustrating a case where a scheduling assignment (SA) resource and a data resource of each transmitting terminal are indirectly associated by a predetermined rule.
  • SA scheduling assignment
  • UE A which has transmitted SA 1400 and data 1401 and 1402 before transmitting the SA and data
  • terminal B transmitting another SA 1403 and data 1404 and 1405.
  • data is predetermined to use the same frequency resource as the associated SA and is transmitted twice.
  • the data 1401 and 1402 transmitted by terminal A are predetermined to use the same frequency resources as the SA 1401 associated with it, and the data 1401 and 1402 are shown in FIG. 14 (a).
  • the data 1404 and 1405 transmitted by the terminal B are also repeatedly transmitted twice using the same frequency resource as the SA 1403 associated with it, according to a predetermined rule.
  • the number and repetition of data repetitive transmission are not limited thereto, and may be set to various values.
  • the terminal A and the terminal B is a terminal (for example, the terminal C) before the SA and data transmission before the SA transmission and reception resource area 1406 and the terminal C transmits the SA and data
  • the terminal C to newly transmit the SA is a corresponding SA transmit / receive resource region ( 1408 may perform energy sensing.
  • the terminal C may perform energy sensing on the data resource region 1407 occupied by the terminal A and the terminal B for transmitting data.
  • the terminal C determines that there is another terminal occupying a 1409 resource and a 1410 resource, and may not use the two resources, that is, the 1409 resource and the 1410 resource, for SA transmission.
  • the terminal C to transmit the SA knows whether the terminal A or the terminal B will continue to occupy SA resources and data resources only by energy sensing of the data resource region 1408 occupied by the terminal A or the terminal B. Can't. Therefore, if the terminal A or the terminal B terminates the resource occupancy, there is a disadvantage that the terminal C to transmit the SA may miss the available resources.
  • FIG. 14 (b) is a diagram for a case in which an SA signal of each transmitting terminal directly informs an associated data resource.
  • a terminal for example, terminal C
  • the terminal A transmits SA 1411 and data 1412 and 1413 before transmitting the SA and data.
  • another SA 1414 and terminal B transmitting data 1415 and 1416 existed, where the data uses frequency resources according to resource allocation information indicated by the associated SA, and transmits twice.
  • the data 1412 and 1413 transmitted by the terminal A are repeatedly transmitted twice using frequency resources according to the resource allocation information indicated by the associated SA 1411.
  • the data 1415 and 1416 transmitted by B are also transmitted twice, using frequency resources according to the resource allocation information indicated by the associated SA 1414.
  • the number and period of data repetition transmission are Not limited to ah Said, the course can be set to different values.
  • the terminal (for example, terminal C) to newly transmit the SA may perform energy sensing on the resource region before the transmit / receive resource region 1408 of the corresponding SA that the terminal C intends to transmit.
  • the terminal C newly transmitting the SA should perform channel sensing on the SA transmittable resource region 1406 before the transmittable resource region 1408 of the corresponding SA that the terminal C intends to transmit.
  • the terminal C determines that there are other terminals occupying 1417 resources and 1418 resources, and may not use the two resources, that is, 1417 resources and 1418 resources, for SA transmission.
  • the terminal C to transmit the SA knows whether the terminal A or the terminal B will continue to occupy SA resources and data resources only by energy sensing of the data resource region 1408 occupied by the terminal A or the terminal B. Can't. Therefore, if the terminal A or the terminal B terminates the resource occupancy, there is a disadvantage that the terminal C to transmit the SA may miss the available resources.
  • 14C is a diagram illustrating a D2D communication method when an SA signal includes resource occupation information according to an embodiment of the present invention.
  • the data resource may be determined according to resource allocation information that is directly informed by the associated SA, or may be determined indirectly by the resource of the associated SA. Since it has been described above, a detailed description thereof will be omitted.
  • the number and period of data repetition transmission are not limited thereto, and may be set to various values.
  • terminal A When a terminal (for example, terminal C) wants to transmit SA and data, when there is a terminal A which has transmitted SA 1420 and associated data before the terminal transmits SA and data, terminal A
  • the SA 1420 may include information (eg, 1 bit information) on whether to continue to occupy resources in the next SA transmit / receive resource region 1408.
  • the terminal C and the terminal B to occupy the new SA transmission resource region (1406, 1407) next to the resource area (1406, 1407) to transmit the SA and data occupied by the terminal C and the SA transmittable resource region ( 1408 may perform energy sensing or SA monitoring.
  • the terminal C may know whether the resources occupied by the received SAs are still being used when the next SA transmit / receive resource region appears from the currently received SAs.
  • the SA may include information on whether to continue to occupy the resource until a cycle of several SA transmit / receive resource regions instead of information on whether to occupy the next SA transmit / receive resource.
  • the SA 1422 of terminal B receives information on whether to continue to occupy resources in the next SA transmit / receive resource region 1408. It may include. If the information indicating whether the terminal B included in the SA 1422 transmitted by the terminal B continues to occupy the resource indicates that the terminal B does not continue to occupy the resource, the receiving terminal (ie, the terminal C) may transmit the next SA transmit / receive resource region. It can be seen at 1408 that the use of the 1423 resource is possible.

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Abstract

La présente invention concerne un procédé et un appareil d'émission d'informations de commande pour une communication de dispositif à dispositif (D2D). Un procédé de communication entre terminaux d'un terminal d'émission selon un mode de réalisation de la présente invention comporte les étapes consistant à: déterminer si des données d'émission correspondent à des données finales d'émission; générer un premier signal de détection de canal comprenant des informations indiquant que les données d'émission correspondent à une émission finale lorsque les données d'émission sont des données finales d'émission; et émettre les données d'émission et le premier signal de détection de canal. Selon un mode de réalisation de la présente invention, un signal de détection de canal, qui est nécessairement requis pour un fonctionnement en D2D d'un schéma d'attribution de ressources réparties, est utilisé pour émettre les informations de commande de telle sorte que des informations de commande puissent être échangées entre terminaux sans introduire un canal et un signal de commande supplémentaires.
PCT/KR2014/010760 2013-11-08 2014-11-10 Procédé et appareil d'émission d'informations de commande pour communication de dispositif à dispositif WO2015069080A1 (fr)

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US15/033,362 US10334625B2 (en) 2013-11-08 2014-11-10 Method and apparatus for transmitting control information for device-to-device communication
ES14859528T ES2784622T3 (es) 2013-11-08 2014-11-10 Procedimiento y aparato de transmisión de información de control para comunicación de dispositivo a dispositivo
EP14859528.3A EP3068061B1 (fr) 2013-11-08 2014-11-10 Procédé et appareil d'émission d'informations de commande pour communication de dispositif à dispositif

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WO2012096493A2 (fr) * 2011-01-10 2012-07-19 엘지전자 주식회사 Procédé pour déterminer une puissance de transmission pour transmettre des signaux de liaison montante entre des terminaux dans un système de communication sans fil qui supporte une communication de terminal à terminal, et appareil associé
WO2013141669A1 (fr) * 2012-03-23 2013-09-26 엘지전자 주식회사 Procédé et appareil d'accès à un canal dans un système lan sans fil
WO2013162333A1 (fr) * 2012-04-26 2013-10-31 한국전자통신연구원 Procédé de communication entre dispositifs utilisant la commande partielle de dispositifs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016209056A1 (fr) * 2015-06-26 2016-12-29 엘지전자 주식회사 Procédé et appareil d'émission/réception de signal de terminal de communications de dispositif à dispositif dans un système de communications sans fil
US11115938B2 (en) 2015-06-26 2021-09-07 Lg Electronics Inc. Method and apparatus for transceiving signal of device-to-device communication terminal in wireless communication system
US11689337B2 (en) 2015-06-26 2023-06-27 Lg Electronics Inc. Method and apparatus for transceiving signal of device-to-device communication terminal in wireless communication system

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