WO2015109773A1 - D2d通信同步信道的传输方法及系统、发送端及接收端 - Google Patents

D2d通信同步信道的传输方法及系统、发送端及接收端 Download PDF

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Publication number
WO2015109773A1
WO2015109773A1 PCT/CN2014/081868 CN2014081868W WO2015109773A1 WO 2015109773 A1 WO2015109773 A1 WO 2015109773A1 CN 2014081868 W CN2014081868 W CN 2014081868W WO 2015109773 A1 WO2015109773 A1 WO 2015109773A1
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Prior art keywords
pd2dsch
d2dss
frequency domain
subframe
occupied
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PCT/CN2014/081868
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English (en)
French (fr)
Inventor
袁明
夏树强
吴栓栓
袁弋非
杨瑾
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中兴通讯股份有限公司
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Publication of WO2015109773A1 publication Critical patent/WO2015109773A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/002Mutual synchronization
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a device-to-device (D2D) communication synchronization channel transmission method and system, a transmitting end and a receiving end.
  • D2D device-to-device
  • D2D means that the service data is not forwarded by the base station, but is directly transmitted by the source user equipment to the target user equipment through the air interface.
  • This communication mode is different from the communication mode of a conventional cellular system.
  • D2D not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network.
  • Cellular network-based D2D communication is a new technology that directly communicates between multiple D2D-enabled terminal devices under the control of the system. It can reduce system resource consumption, increase the spectrum efficiency of cellular communication systems, and reduce terminal transmission. Power consumption, and to a large extent save network operating costs.
  • the receiving end of the D2D service data may be a single UE or multiple UEs, that is, the D2D communication may be a Unicast communication, or may be a broadcast. Communication or multicast (Groupcast or Group Communication) or multicast (Multicast) communication.
  • LTE Long Term Evolution
  • LTE-Advanced Advanced Long Term Evolution
  • IMT-Advanced International Mobile Telecommunication Advanced
  • OFDM Orthogonal Frequency Division Multiplexing
  • a 10 ms radio frame consists of 10 subframes, and 1 subframe consists of 2 consecutive slots, that is, subframe i includes slots 2i and 2i+1.
  • one downlink subframe consists of 14 OFDM symbols
  • one uplink subframe consists of 14 SC-FDMA (single carrier-Frequency Division Multiple Access). Frequency division multiple access) symbol composition;
  • 1 downlink subframe is composed of 12 OFDM symbols
  • 1 uplink subframe is composed of 12 SC-FDMA symbols.
  • a resource block (abbreviated as RB) is composed of 12 consecutive subcarriers in the frequency domain and all OFDM/SC-FDMA symbols in one consecutive time slot in the time domain; one resource block pair (Resource Block) Pair, RB pair for short, consists of 12 consecutive subcarriers in the frequency domain and all OFDM/SC-FDMA symbols in one consecutive subframe in the time domain.
  • a resource corresponding to one subcarrier on each OFDM/SC-FDMA symbol is called a Resource Element (RE).
  • cell search is a very critical step in mobile communication, and is a prerequisite for a terminal to establish a communication link with a base station.
  • the cell search process is mainly for the terminal and the cell to obtain time synchronization and frequency synchronization and obtain physical cell ID, system bandwidth and other cell broadcast information.
  • the terminal obtains time synchronization and frequency synchronization through the synchronization signal, and then obtains related information of the current cell, such as bandwidth, cell ID, frame clock information, cell antenna configuration, CP length, and the like.
  • the primary premise of data transmission between the source user equipment and the target user equipment is to implement time-frequency synchronization at both ends of the transceiver.
  • D2D Synchronization Signal D2D Synchronization Signal
  • D2DSS Device-to-device synchronization signal
  • PD2DSCH physical device-to-device synchronization channel
  • the D2D communication uses the uplink resource (that is, the uplink frequency band of the FDD or the uplink subframe of the TDD) for transmission, the synchronization process and the synchronization signaling design between the D2D UEs are very similar to those in the LTE/LTE-A system. Great difference.
  • Embodiments of the present invention provide a method and system for transmitting a D2D communication synchronization channel, a transmitting end, and a receiving end, which are used to solve a device-to-device relationship in an out-of-coverage scenario (out-of-coverage and in-cover/in-coverage scenarios) Synchronization issue.
  • an embodiment of the present invention provides a device-to-device communication synchronization channel transmission method, including: a device-to-device D2D transmitting end transmitting a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH, where When the PD2DSCH is sent, the frequency domain location of the PD2DSCH in the subframe and the frequency domain location of the D2DSS in the subframe remain the same, or the D2DSS determines the frequency domain location of the PD2DSCH in the subframe.
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein the PD2DSS and the SD2DSS are both transmitted in a sequence, and the sequence type of the PD2DSS is M, M A positive integer less than or equal to 3; the sequence type of the SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the frequency domain position of the PD2DSCH in the subframe is consistent with the frequency domain position of the D2DSS in the subframe, and includes: a starting RB index occupied by the PD2DSCH in the frequency domain in the subframe
  • the initial RB index occupied by the D2DSS in the frequency domain is the same, and the number of RBs occupied by the PD2DSCH in the frequency domain is the same as the number of RBs occupied by the D2DSS in the frequency domain.
  • the D2DSS determines the frequency domain location of the PD2DSCH in the subframe, including: one D2DSS in the subframe corresponds to one or more PD2DSCHs; and the D2DSS indicates that each of the corresponding PD2DSCHs is in the subframe intermediate frequency The starting RB index occupied by the domain and the number of RBs occupied.
  • the D2DSS respectively indicates a starting RB index occupied by each corresponding PD2DSCH in a frequency domain of the subframe and the number of occupied RBs, including: each sequence of the PD2DSS corresponds to one PD2DSCH in the sub- The number of RBs occupied in the frequency domain of the frame; each sequence of the SD2DSS corresponds to a starting RB index occupied by the PD2DSCH in the frequency domain of the subframe.
  • each sequence of the SD2DSS corresponds to a starting RB index occupied by each PD2DSCH in a frequency domain of the subframe, including: if N is equal to the total number of RBs corresponding to the D2DSS transmission bandwidth, then the Nth of the SD2DSS The sequence corresponds to the initial RB index occupied by each PD2DSCH in the frequency domain of the subframe; if N is greater than the total number of RBs corresponding to the D2DSS transmission bandwidth, the value of the RB is obtained by using N to obtain a value L, the SD2DSS The L-th sequence corresponds to the initial RB index occupied by the PD2DSCH in the frequency domain of the subframe, where the L is a positive integer equal to or less than the total number of RBs corresponding to the D2DSS transmission bandwidth.
  • the method further includes: when transmitting the PD2DSCH, the first available single carrier-frequency division of the PD2DSCH after the time domain symbol from the PD2DSS or the SD2DSS in the time domain
  • One or a plurality of available SC-FDMA symbols are transmitted from the beginning of the multiple access SC-FDMA symbol, wherein the number of one or consecutive plurality of available SC-FDMA symbols occupied by the PD2DSCH is fixedly configured in advance by the network side.
  • the number of one or more consecutive SC-FDMA symbols occupied by the D2DSCH is 4 or 5 or 6.
  • the method further includes: In the no-coverage scenario, the D2D sender monitors the available resources of the D2DSS.
  • the idle resource is selected to send the D2DSS and the PD2DSCH. If no available resources are monitored, the next time is re-waited. In the case of coverage/partial coverage, the D2D sender sends D2DSS on the available resources scheduled by the network side.
  • an embodiment of the present invention further provides a device-to-device communication synchronization channel transmission method, including: a device-to-device D2D receiving end receives a device-to-device synchronization signal D2DSS and a physical device sent from a D2D transmitting end to a device synchronization channel PD2DSCH, wherein, when receiving the PD2DSCH, receiving a PD2DSCH at a frequency domain location that is the same as a frequency domain location where the D2DSS is located; or receiving a PD2DSCH at a frequency domain location determined by the D2DSS.
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein PD2DSS and SD2DSS are received in a sequence, PD2DSS has a sequence type of M, and M is a positive integer less than or equal to 3.
  • the sequence type of SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the receiving the PD2DSCH in the same frequency domain location as the frequency domain location where the D2DSS is located including: receiving a PD2DSCH on a starting RB index occupied by the D2DSS, and the PD2DSCH is in a frequency domain
  • the number of RBs occupied is the same as the number of RBs occupied by the D2DSS.
  • the receiving the PD2DSCH in the frequency domain location determined by the D2DSS includes: The PD2DSCH is received at a frequency domain location corresponding to the starting RB index and the number of RBs.
  • the method further includes:
  • the PD2DSCH is received and demodulated on consecutive 4 or 5 or 6 available SC-FDMA symbols starting with an available SC-FDMA symbol.
  • the method further includes:
  • the D2D receiving end monitors and receives the D2DSS on all D2DSS available resources, completes initial time synchronization and frequency synchronization between the transmitting end and the transmitting end; after receiving and demodulating the PD2DSCH, completing the service channel according to the information in the PD2DSCH receive.
  • the embodiment of the present invention further provides a device-to-device communication sending end, including: a generating module, configured to: generate a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH; a module, configured to: send a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH; wherein, when the PD2DSCH is transmitted, a frequency domain position of the PD2DSCH in a subframe and the D2DSS are in a subframe The frequency domain location remains the same; or, the D2DSS determines the frequency domain location of the PD2DSCH in the subframe.
  • a generating module configured to: generate a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH
  • a module configured to: send a device-to-device synchronization signal
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein the PD2DSS and the SD2DSS are both transmitted in a sequence, and the sequence type of the PD2DSS is M, M A positive integer less than or equal to 3; the sequence type of the SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the sending module is configured to keep the frequency domain position of the PD2DSCH in the subframe and the frequency domain position of the D2DSS in the subframe in the subframe when transmitting the PD2DSCH in the following manner:
  • the initial RB index occupied by the PD2DSCH in the frequency domain is the same as the initial RB index occupied by the D2DSS in the frequency domain, and the number of RBs occupied by the PD2DSCH in the frequency domain is related to the D2DSS.
  • the number of RBs occupied in the frequency domain is the same.
  • the sending module is configured to determine, by the D2DSS, a frequency domain position of the PD2DSCH in the subframe when the PD2DSCH is sent in the following manner: when transmitting the PD2DSCH, a D2DSS corresponding to the subframe one or more
  • the PD2DSCH indicates the starting RB index occupied by each corresponding PD2DSCH in the frequency domain of the subframe and the number of occupied RBs.
  • the sending module is configured to indicate, by the D2DSS, a starting RB index occupied by each PD2DSCH in a frequency domain of a subframe and a number of occupied RBs when the PD2DSCH is sent in the following manner.
  • Each sequence of the PD2DSS corresponds to the number of RBs occupied by the PD2DSCH in the frequency domain of the subframe; each sequence of the SD2DSS corresponds to a starting RB index occupied by the PD2DSCH in the frequency domain of the subframe.
  • each sequence of the SD2DSS corresponds to a starting RB index occupied by each PD2DSCH in a frequency domain of the subframe, including: if the N is less than or equal to the total number of RBs corresponding to the D2DSS transmission bandwidth, then the SD2DSS The N types of sequences correspond to the initial RB index occupied by each PD2DSCH in the frequency domain of the subframe; if N is greater than the total number of RBs corresponding to the D2DSS transmission bandwidth, the L obtained by modulo the total number of the RBs by using N, the SD2DSS The Lth sequence corresponds to the initial RB index occupied by the PD2DSCH in the frequency domain of the subframe, and the L is a positive integer equal to or less than the total number of RBs corresponding to the D2DSS transmission bandwidth.
  • the sending module is further configured to: when transmitting the PD2DSCH, the PD2DSCH is the first available single carrier after or before the time domain symbol from the PD2DSS or the SD2DSS in the time domain - Transmitting one or a plurality of available SC-FDMA symbols starting from a frequency division multiple access SC-FDMA symbol, wherein the number of consecutive 4 or 5 or 6 available SC-FDMA symbols occupied by the PD2DSCH is advanced by the network side Fixed configuration.
  • the sending end further includes: a resource selection module, configured to: monitor, in the no-coverage scenario, the available resources of the D2DSS, and if the idle resource is monitored, select an idle resource notification sending module to send the Determining the D2DSS and the PD2DSCH; if no available resources are monitored, waiting for the next time to re-listen; or in the coverage/partial coverage scenario, using the available resources of the network side to notify the sending mode
  • the block sends D2DSS on the available resources scheduled by the network side.
  • an embodiment of the present invention further provides a device-to-device communication receiving end, including: a receiving module, configured to: receive a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel from a D2D transmitting end a PD2DSCH, wherein, when receiving the PD2DSCH, receiving a PD2DSCH at a frequency domain location that is the same as a frequency domain location where the D2DSS is located; or receiving a PD2DSCH at a frequency domain location determined by the D2DSS; The method is configured to: demodulate the received PD2DSCH, and complete receiving the traffic channel according to the information in the PD2DSCH.
  • a receiving module configured to: receive a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel from a D2D transmitting end a PD2DSCH, wherein, when receiving the PD2DSCH, receiving a
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein PD2DSS and SD2DSS are received in a sequence, PD2DSS has a sequence type of M, and M is a positive integer less than or equal to 3.
  • the sequence type of SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the receiving module is configured to receive, when receiving the PD2DSCH, a PD2DSCH in a frequency domain position that is the same as a frequency domain location where the D2DSS is located: in a manner occupied by the D2DSS
  • the PD2DSCH is received on the first RB index, and the number of RBs occupied by the PD2DSCH in the frequency domain is the same as the number of RBs occupied by the D2DSS.
  • the receiving module is configured to receive the PD2DSCH in a frequency domain position determined by the D2DSS when receiving the PD2DSCH in the following manner:
  • the PD2DSCH is received at a frequency domain location corresponding to the starting RB index and the number of RBs.
  • the receiving module is further configured to, when receiving the PD2DSCH, start from the first available SC-FDMA symbol after or before the time domain symbol of the PD2DSS or the SD2DSS in the time domain.
  • the PD2DSCH is received and demodulated on 4 or 5 or 6 available SC-FDMA symbols.
  • the receiving module comprises: a first module, configured to: monitor and receive D2DSS on all D2DSS available resources, complete initial time synchronization and frequency synchronization between the transmitting end and the transmitting end; and a second module, setting And: receiving the PD2DSCH at a frequency domain location that is the same as the frequency domain location where the D2DSS is located; or receiving the PD2DSCH at a frequency domain location determined by the D2DSS.
  • a first module configured to: monitor and receive D2DSS on all D2DSS available resources, complete initial time synchronization and frequency synchronization between the transmitting end and the transmitting end
  • a second module setting And: receiving the PD2DSCH at a frequency domain location that is the same as the frequency domain location where the D2DSS is located; or receiving the PD2DSCH at a frequency domain location determined by the D2DSS.
  • an embodiment of the present invention further provides a device-to-device communication synchronization channel transmission system, including: the transmitting end as described above and the receiving end as described above.
  • the embodiment of the invention further provides a computer program, comprising program instructions, when the program instruction is executed by the device to the sending end of the device, so that the sending end can execute the above method.
  • the embodiment of the present invention further provides another computer program, including program instructions, when the program instruction is executed by the device to the receiving end of the device, so that the receiving end can execute the above method.
  • Embodiments of the present invention also provide a carrier carrying the above computer program.
  • the D2D communication synchronization channel transmission method and system, the transmitting end and the receiving end provided by the embodiments of the present invention solve the synchronization problem between the device and the device in the out-of-coverage and in-cover/in-coverage scenarios.
  • FIG. 1 is a schematic diagram of cellular communication when a UE is located in the same base station cell in the related art
  • FIG. 2 is a schematic diagram of a preferred D2D communication system in the related art
  • FIG. 3 is a flowchart of a specific process of transmitting a PD2DSCH by a D2D transmitting end in an embodiment
  • FIG. 4 is a flowchart of a specific process of receiving a PD2DSCH by a D2D receiving end in an embodiment
  • FIG. 5 is a transmission system structure of a device-to-device communication synchronization channel in an embodiment.
  • FIG. 6 is a schematic diagram of a time-frequency position in which a frequency domain position of a PD2DSCH in a subframe and a frequency domain position of a D2DSS in a subframe are consistent in Application Example 1;
  • FIG. 8 is a schematic diagram of a time-frequency position determined by D2DSS in a frequency domain position where a PD2DSCH is located in Application Example 2;
  • FIG. 9 is a schematic diagram of a time-frequency position determined by D2DSS in another frequency domain position of the PD2DSCH in Application Example 2;
  • FIG. 10 is a schematic diagram of time-frequency positions in which the three D2DSSs correspond to multiple PD2DSCHs in the application example 3, and the frequency domain location of the PD2DSCH is determined by the D2DSS.
  • Preferred embodiment of the invention
  • the present embodiment provides a device-to-device communication synchronization channel transmission method, which is applied to a D2D transmitting end, and includes: a D2D transmitting end transmitting a D2DSS and a PD2DSCH, where the PD2DSCH is in a subframe when transmitting the PD2DSCH
  • the frequency domain location is consistent with the frequency domain location of the D2DSS in the subframe, or the frequency domain location of the PD2DSCH in the subframe is determined by the D2DSS.
  • the D2DSS includes: a D2D Synchronization Signal (PD2DSS) and/or a D2D Synchronization Signal (SD2DSS); wherein the PD2DSS and the SD2DSS are sent in a sequence, the PD2DSS
  • the sequence type is M, M is a positive integer less than or equal to 3; the sequence type of SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the PD2DSCH is sent in the form of a data packet, where the information carried includes: ID information of the D2D synchronization signal transmitting end, and/or type of the D2D synchronization signal transmitting end, and/or system bandwidth of the D2D communication, and/or a D2D subframe.
  • the frequency domain position of the PD2DSCH in the subframe is consistent with the frequency domain position of the D2DSS in the subframe, and includes: a start occupied by the PD2DSCH in the frequency domain in the subframe
  • the RB index is the same as the initial RB index occupied by the D2DSS in the frequency domain
  • the number of RBs occupied by the PD2DSCH in the frequency domain is the same as the number of RBs occupied by the D2DSS in the frequency domain. That is, the number of PD2DSCH and D2DSS included in the subframe is strict-corresponding, that is, one D2DSS uniquely corresponds to one PD2DSCH.
  • the frequency domain position of the PD2DSCH in the subframe is determined by the D2DSS, including: one D2DSS in the subframe corresponds to one or more PD2DSCHs; and the D2DSS indicates that each PD2DSCH is in the subframe intermediate frequency.
  • the determination means that the D2DSS does not directly include the indicated content, that is, the starting RB index and the number of occupied RBs, but will be used as the sequence of the receiving end synchronization (PD2DSS).
  • the sequence and the sequence of SD2DSS) add a new meaning to the number.
  • the D2DSS respectively indicates a starting RB index and a number of RBs occupied by each PD2DSCH in a frequency domain of the subframe, including: each sequence of the PD2DSS corresponds to one PD2DSCH in a frequency domain of the subframe.
  • each sequence of the SD2DSS corresponds to a starting RB index occupied by a PD2DSCH in a frequency domain of a subframe.
  • M 3
  • the three different sequences in the PD2DSS respectively correspond to one of 0 ⁇ 2, and the value is bound to the number of RBs occupied by the PD2DSCH.
  • the different sequences in the SD2DSS respectively correspond to a value in the range 0 to ⁇ -1, where the value indicates the initial RB index occupied by the PD2DSCH, where if N is less than or equal to the RB corresponding to the D2DSS transmission bandwidth
  • the Nth sequence of the SD2DSS corresponds to each
  • the value of the RB is obtained by using N to obtain a value L, and the Lth sequence of the SD2DSS corresponds to the initial RB index occupied by the PD2DSCH in the frequency domain of the subframe.
  • the L is a positive integer equal to or less than the total number of RBs corresponding to the D2DSS transmission bandwidth.
  • the PD2DSCH when transmitting the PD2DSCH, is one or more consecutive in the time domain starting from the first available SC-FDMA symbol after or before the time domain symbol of the PD2DSS or the SD2DSS
  • the number of one or a plurality of available SC-FDMA symbols occupied by the PD2DSCH is fixedly configured in advance by the network side, and is preferably previously fixedly configured by the network side.
  • the process of transmitting the PD2DSCH by the D2D transmitting end includes:
  • the D2D sender first monitors the available resources of the D2DSS.
  • the D2D sender does not listen to the available resources, waits for the next time to re-listen, and selects whether to send the D2DSS and the PD2DSCH according to the monitoring result.
  • the D2D transmitting end sends the D2DSS under the scheduling of the network side according to the available resources indicated by the base station.
  • the frequency domain location and location of the PD2DSCH in the subframe are used.
  • the D2DSS is transmitted in a manner that the frequency domain position in the subframe remains consistent, or is transmitted by using the PD2DSCH in a frequency domain position in the subframe determined by the D2DSS.
  • the embodiment further provides a device-to-device communication synchronization channel transmission method, which is applied to the D2D receiving end, and includes:
  • the D2D transmitting end receives the D2DSS and the PD2DSCH sent by the D2D transmitting end, where the D2D receiving end first receives the D2DSS, and then, when receiving the PD2DSCH, the PD2DSCH is in the same frequency domain position as the frequency domain location where the D2DSS is located.
  • the PD2DSCH includes: receiving a PD2DSCH on a starting data block RB index occupied by the D2DSS, and that is, each D2DSS uniquely corresponds to one PD2DSCH.
  • the receiving the PD2DSCH in the frequency domain location determined by the D2DSS includes:
  • the sequence of the SD2DSS is one of the N sequences, and corresponds to a value in the range of 0 to N-1, where the value indicates the initial RB index occupied by the PD2DSCH in the frequency domain of the subframe; the sequence of the PD2DSS is M One of the sequences, corresponding to a value from 0 to M-1, indicating the number of RBs occupied by the PD2DSCH.
  • the PD2DSCH is received at a frequency domain position corresponding to the initial RB index and the number of RBs.
  • the method further includes:
  • the PD2DSCH is received and demodulated on consecutive 4 or 5 or 6 available SC-FDMA symbols starting with an available SC-FDMA symbol.
  • the specific process of the D2D receiving end receiving the PD2DSCH includes:
  • the D2D receiving end monitors and receives the D2DSS on all available resources of the D2DSS, and completes initial time synchronization and frequency synchronization between the transmitting end and the transmitting end;
  • the D2D receiving end receives the PD2DSCH in the same RB index as the RB index occupied by the D2DSS, or the starting RB index determined by the D2DSS and the RB number, and after or before the PD2DSS or SD2DSS Receive and demodulate PD2DSCH on the first 4 or 5 or 6 available SC-FDMA symbols starting with the first SC-FDMA symbol;
  • S203 After receiving and demodulating the PD2DSCH, receiving the service channel according to the information in the PD2DSCH.
  • the embodiment further provides a device-to-device communication synchronization channel transmission system, including: a D2D communication sending end and a D2D communication receiving end, wherein: the sending end includes: a generating module, and setting a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH; a transmitting module configured to transmit a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH; wherein, when transmitting the PD2DSCH, The frequency domain position of the PD2DSCH in the subframe is consistent with the frequency domain position of the D2DSS in the subframe; or, the frequency domain position of the PD2DSCH in the subframe is determined by the D2DSS.
  • the sending end includes: a generating module, and setting a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein the PD2DSS and the SD2DSS are both transmitted in a sequence, the sequence type of the PD2DSS is M, and M is less than or equal to A positive integer of 3; the sequence type of the SD2DSS is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the sending module is configured to keep the frequency domain position of the PD2DSCH in the subframe and the frequency domain position of the D2DSS in the subframe consistently when the PD2DSCH is sent in the following manner, including: The starting RB index occupied by the PD2DSCH in the frequency domain and the starting RB index occupied by the D2DSS in the frequency domain, and the number of RBs occupied by the PD2DSCH in the frequency domain and the D2DSS The number of RBs occupied in the frequency domain is the same.
  • the sending module is configured to determine, by the D2DSS, a frequency domain position of the PD2DSCH in the subframe when the PD2DSCH is sent in the following manner: when transmitting the PD2DSCH, in a subframe
  • One D2DSS corresponds to one or more PD2DSCHs; the D2DSS respectively indicates a starting RB index occupied by each PD2DSCH in the frequency domain of the subframe and the number of occupied RBs.
  • the sending module is configured to: when the PD2DSCH is sent in the following manner, the D2DSS respectively indicates an initial RB index occupied by each PD2DSCH in a frequency domain of a subframe, and Number of occupied RBs: Each sequence of the PD2DSS corresponds to a number of RBs occupied by a PD2DSCH in a frequency domain of a subframe; each sequence of the SD2DSS corresponds to a start of a PD2DSCH in a frequency domain of a subframe. RB index.
  • Each sequence of the SD2DSS corresponds to a starting RB index occupied by each PD2DSCH in a frequency domain of the subframe, and includes: if the N is less than or equal to the total number of RBs corresponding to the D2DSS transmission bandwidth, the Nth type of the SD2DSS The sequence corresponds to the initial RB index occupied by each PD2DSCH in the frequency domain of the subframe; if N is greater than the total number of RBs corresponding to the D2DSS transmission bandwidth, the L obtained by modulo the total number of the RBs by using N, the SD2DSS The L sequence corresponds to the initial RB index occupied by the PD2DSCH in the frequency domain of the subframe, and the L is a positive integer equal to or less than the total number of RBs corresponding to the D2DSS transmission bandwidth.
  • the sending module is further configured to: when transmitting the PD2DSCH, the PD2DSCH may be sent by using one or a plurality of consecutive SC-FDMA symbols starting with a single carrier-frequency division multiple access SC-FDMA symbol, where Said 4 or 5 or 6 available SC-FDMAs for PD2DSCH The number of symbols is fixedly fixed in advance by the network side.
  • the sending end further includes: a resource selection module, configured to listen to available resources of the D2DSS in a no-coverage scenario, and if an idle resource is monitored, select an idle resource notification sending module to send the D2DSS and The PD2DSCH waits for the next time to re-listen if the available resources are not monitored; or, in the coverage/partial coverage scenario, the available resource notification scheduling module that is scheduled by the network side sends the D2DSS on the available resources scheduled by the network side.
  • a resource selection module configured to listen to available resources of the D2DSS in a no-coverage scenario, and if an idle resource is monitored, select an idle resource notification sending module to send the D2DSS and The PD2DSCH waits for the next time to re-listen if the available resources are not monitored; or, in the coverage/partial coverage scenario, the available resource notification scheduling module that is scheduled by the network side sends the D2DSS on the available resources scheduled by the network side.
  • the receiving end includes: a receiving module, configured to receive a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH from the D2D transmitting end, where, when receiving the PD2DSCH, in a frequency domain location where the D2DSS is located Receiving a PD2DSCH at the same frequency domain location; or receiving a PD2DSCH at a frequency domain location determined by the D2DSS; a processing module configured to demodulate the received PD2DSCH and complete according to information in the PD2DSCH Reception of traffic channels.
  • a receiving module configured to receive a device-to-device synchronization signal D2DSS and a physical device-to-device synchronization channel PD2DSCH from the D2D transmitting end, where, when receiving the PD2DSCH, in a frequency domain location where the D2DSS is located Receiving a PD2DSCH at the same frequency domain location; or receiving a
  • the D2DSS includes: a D2D primary synchronization signal PD2DSS and/or a D2D secondary synchronization signal SD2DSS; wherein, both PD2DSS and SD2DSS are received in a sequence, the sequence type of PD2DSS is M, and M is a positive integer less than or equal to 3; SD2DSS The sequence type is N, and N is a positive integer greater than or equal to the total number of RBs corresponding to the D2D transmission bandwidth.
  • the receiving module is configured to receive the
  • the receiving module is configured to receive the PD2DSCH in a frequency domain position determined by the D2DSS when receiving the PD2DSCH in the following manner: The PD2DSCH is received at a frequency domain location corresponding to the starting RB index and the number of RBs.
  • the receiving module is further configured to, when receiving the PD2DSCH, consecutive 4 in the time domain starting from the first available SC-FDMA symbol after or before the time domain symbol of the PD2DSS or the SD2DSS The PD2DSCH is received and demodulated on 5 or 6 available SC-FDMA symbols.
  • the receiving module includes: a first module configured to listen to and receive D2DSS on all D2DSS available resources, complete initial time synchronization and frequency synchronization between the transmitting end, and a second module, which is set to The PD2DSCH is received at a frequency domain location where the frequency domain location of the D2DSS is located; or the PD2DSCH is received at a frequency domain location determined by the D2DSS.
  • the embodiment further provides a computer program, including a program instruction, when the program instruction is executed by the device to the transmitting end of the device, so that the transmitting end can execute the above method.
  • the embodiment further provides another computer program, including program instructions, which when the program instruction is executed by the device to the receiving end of the device, enables the receiving end to execute the above method.
  • This embodiment also provides a carrier carrying the above computer program.
  • the frequency domain position of the PD2DSCH in the subframe is consistent with the frequency domain position of the D2DSS in the subframe
  • the number of PD2DSCH and D2DSS included in each subframe is strict - corresponding That is, each D2DSS uniquely corresponds to one PD2DSCH.
  • the guard interval is used for the time required for the D2D UE to transmit and receive.
  • the RB index of the PD2DSCH in the first group and the RB index of the first group D2DSS It is completely consistent, and the number of RBs is also the same; the time domain symbol in which the PD2DSCH is located is on the consecutive four available SC-FDMA symbols starting from the first available SC-FDMA symbol after the time domain symbol of the SD2DSS.
  • the RB index of the PD2DSCH in the second group is exactly the same as the RB index of the second group D2DSS, and the number of RBs is the same; the time domain symbol in which the PD2DSCH is located from the first available SC-FDMA after the time domain symbol of the PD2DSS The symbol starts with six consecutive SC-FDMA symbols.
  • the RB index of the PD2DSCH of the third group is exactly the same as the RB index of the third group of D2DSS, and the number of RBs is the same.
  • the time domain symbol of the PD2DSCH is the first available SC-FDMA symbol after the time domain symbol from the PD2DSS. Start with 5 consecutive SC-FDMA symbols.
  • the process of sending the PD2DSCH by the D2D transmitting end includes:
  • the sending rule is: If the first group is idle, the D2D sender is in the RB index where the first group D2DSS is located, and the first one after the time domain symbol from the SD2DSS is available. The PD2DSCH is transmitted on consecutive 4 available SC-FDMA symbols starting with the SC-FDMA symbol. If the second group is idle, the D2D sender transmits on the RB index where the second group D2DSS is located, and the consecutive six available SC-FDMA symbols starting from the first available SC-FDMA symbol after the time domain symbol of the PD2DSS. PD2DSCH.
  • the D2D sender transmits on the RB index where the third group D2DSS is located, and the consecutive five available SC-FDMA symbols starting from the first available SC-FDMA symbol after the time domain symbol of the PD2DSS. PD2DSCH. If there is no idle resource, it waits for the next time to re-listen, and selects whether to send D2DSS and PD2DSCH according to the monitoring result.
  • the process of receiving the demodulated PD2DSCH by the D2D receiving end includes: First, the D2D receiving end monitors and receives the D2DSS on the available resources of the three groups of D2DSS, According to the relative positional relationship between the PD2DSS and the SD2DSS in the time domain, the RB index of the D2DSS can be known, and the initial time synchronization and frequency synchronization between the D2DSS and the transmitting end can be obtained. Then, if the D2D receiving end receives the first group of synchronous resources.
  • the D2D receiver receives the same RB index as the RB index occupied by the D2DSS, and receives the consecutive 4 available SC-FDMA symbols starting from the first available SC-FDMA symbol after the SD2DSS occupied the time domain symbol. And demodulate PD2DSCH. If the D2D receiver receives the D2DSS signal on the second set of synchronization resources, the D2D receiver has the same RB index as the RB index occupied by the D2DSS, and the first available SC-FDMA after the time domain symbol from the PD2DSS. The PD2DSCH is received and demodulated on successive 6 available SC-FDMA symbols starting with the symbol.
  • the D2D receiver receives the D2DSS signal on the third set of synchronization resources, the D2D receiver has the same RB index as the RB index occupied by the D2DSS, and the first available SC-FDMA after the time domain symbol from the PD2DSS.
  • the PD2DSCH is received and demodulated on consecutive 5 available SC-FDMA symbols starting with the symbol.
  • the D2D receiving end completes the reception of the traffic channel according to the information in the PD2DSCH.
  • the frequency domain position and time domain position of the D2DSS in each group are the same as those in FIG. 6.
  • the frequency domain of the PD2DSCH in each group is the same.
  • the RB index of the PD2DSCH in each group is the same as the RB index of each D2DSS, and the number of RBs is the same.
  • the PD2DSCH in the first group The time domain symbol is located on consecutive 5 available SC-FDMA symbols starting from the first available SC-FDMA symbol before the time domain symbol of the PD2DSS; the time domain symbol of the PD2DSCH in the second group is from the SD2DSS
  • the last 4 available SC-FDMA symbols starting with the first available SC-FDMA symbol before the symbol; the first available SC-FDMA symbol before the time domain symbol from the PD2DSS in the time domain symbol of the PD2DSCH in Group 3 Start with 5 consecutive SC-FDMA symbols.
  • consecutive 4 or 5 or 6 available SC-FDMAs are started from the first available SC-FDMA symbol before the time domain symbol occupied by the PD2DSS or SD2DSS.
  • the PD2DSCH is transmitted on the symbol.
  • the receiving end listens and receives D2DSS on the above three groups of D2DSS available resources, as shown in FIG. 7, the first available SC-FDMA symbol before the time domain symbol from PD2DSS or SD2DSS
  • the PD2DSCH is received and demodulated on consecutive 4 or 5 or 6 available SC-FDMA symbols starting with the number.
  • the frequency domain location of PD2DSCH is determined by D2DSS
  • the number of PD2DSCH and D2DSS included in each subframe may not be corresponding, that is, one D2DSS may be associated with multiple PD2DSCHs.
  • the location of the PD2DSS in the frequency domain is determined as follows: The PD2DSS carries three different sequences J
  • the SD2DSS carries 168 different sequences, and the 168 sequences correspond to a value from 0 to 167, which is bound to the initial RB index of the RB of the PD2DSCH.
  • the location of the PD2DSS time domain is determined by: PD2DSCH on the consecutive 4 or 5 or 6 available SC-FDMA symbols starting from the first available SC-FDMA symbol after the time domain symbol of the PD2DSS or SD2DSS in the time domain,
  • the number of time domain symbols occupied by the PD2DSCH is fixed, and may be 4 or 5 or 6 available SC-FDMA symbols, and is fixedly configured in advance by the network side. In FIG. 8, six available SC-FDMA symbols are taken as an example.
  • the location of the PD2DSS time domain may also be determined as follows: PD2DSCH consecutive 4 or 5 or 6 available SCs in the time domain starting from the first available SC-FDMA symbol before the time domain symbol of the PD2DSS or SD2DSS On the FDMA symbol, as shown in Figure 9, four available SC-FDMA symbols are taken as an example.
  • the process of transmitting the PD2DSCH by the D2D transmitting end includes:
  • the D2D sender first listens to the above-mentioned unique D2DSS available resources; when the resource is idle, it sends a D2DSS, where the sequence carried by the PD2DSS is used to indicate
  • the PD2DSCH is transmitted on consecutive 6 or 4 available SC-FDMA symbols starting with the first available SC-FDMA symbol. As shown in FIG. 8 and FIG.
  • the sequence carried by the PD2DSS corresponds to the value 1 , that is, the PD2DSS is transmitted by using the sequence corresponding to 1 , and 1 indicates that the PD 2DSCH occupies 4 RBs; the sequence carried by the SD 2DSS corresponds to the value 0, that is, SD Send SD2DSS with the sequence corresponding to 0, 1 indicates that the starting RB index of the RB occupied by the PD2DSCH is 0.
  • the starting position is RB 0, occupying 4 RBs; corresponding to PD2DSCH 2, PD2DSS carries The sequence corresponds to the value 2, that is, the PD2DSS is transmitted by the sequence corresponding to 2, 2 indicates that the PD2DSCH occupies 6 RBs; the sequence carried by the SD2DSS corresponds to the value ⁇ , and ⁇ is a value of 0 to 167, that is, the corresponding value of the M is used.
  • the sequence sends SD2DSS, where ⁇ indicates that the starting RB index of the RB occupied by the PD2DSCH is M. Therefore, when transmitting PD2DSCH2, the starting position is RB M, which occupies 6 RBs.
  • the sequence carried by the PD2DSS corresponds to the value 0, that is, the D2DSS is transmitted with the sequence corresponding to 0, 0 indicates that the PD2DSCH occupies 2 RBs; the sequence carried by the SD2DSS corresponds to the values N and 0, N and 0 respectively.
  • the SD2DSS is transmitted by using the sequence corresponding to N and 0 respectively, and N and 0 indicate that the starting RB indexes of the RBs occupied by PD2DSCH3 and PD2DSCH 4 are N and 0. Therefore, when transmitting PD2DSCH 3 and PD2DSCH 4, the starting positions are RB N and RB O, respectively, which occupy 2 RBs.
  • the process of receiving the demodulation of the PD2DSCH by the D2D receiving end includes: first, the D2D receiving end monitors and receives the D2DSS on the only available D2DSS available resource, and can obtain the number of RBs occupied by the PD2DSCH according to the sequence carried by the PD2DSS; according to the SD2DSS The carried sequence can learn the starting position of the RB occupied by the PD2DSCH, and complete the initial time synchronization and frequency synchronization between the transmitting end and the transmitting end. Then, the D2D receiving end receives and solves the corresponding time-frequency resource according to the indication of the D2DSS. Adjust PD2DSCH.
  • the sequence carried by the PD2DSS is used to indicate the number of RBs occupied by the PD2DSCH
  • the sequence carried in the SD2DSS is used to indicate the starting RB index of the RB occupied by the PD2DSCH, and the consecutive 6 or 4 available SCs starting from the first available SC-FDMA symbol after or before the time domain symbol of the PD2DSS or SD2DSS
  • the PD2DSCH is received and demodulated on the -FDMA symbol.
  • the D2D receiving end completes the reception of the traffic channel according to the information in the PD2DSCH.
  • Application Example 3 (The location of the frequency domain where the PD2DSCH is located is determined by the D2DSS.) As shown in Figure 10, there are three sets of available resources of the D2DSS, and the available resources of each group of D2DSS correspond to one or more PD2DSCHs. Said. It can be seen from the above embodiments that the D2D communication synchronization channel transmission method and system, the transmitting end and the receiving end provided in the above embodiments solve the problem of device-to-device synchronization in various out-of-coverage scenarios.
  • the present invention solves the problem of synchronization between devices and devices in the coverage and coverage/ince coverage scenarios.

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Abstract

一种D2D通信同步信道的传输方法及系统、发送端及接收端,该系统包括:发送端和接收端,发送端包括生成模块和发送模块,用于发送D2DSS和 PD2DSCH;接收端包括接收模块和处理模块,用于接收D2DSS和PD2DSCH;其中,在发送PD2DSCH时,PD2DSCH在子帧中的频域位置和D2DSS在子帧中的频域位置保持一致;或者,PD2DSCH在子帧中的频域位置由D2DSS 确定;在接收PD2DSCH时,在和D2DSS所在的频域位置相同的频域位置上接收PD2DSCH;或者,在由所述D2DSS确定的频域位置上接收PD2DSCH。

Description

D2D通信同步信道的传输方法及系统、 发送端及接收端 技术领域
本发明涉及无线通信领域, 尤其涉及一种设备到设备 ( Device-to-Device, 简称 D2D )通信同步信道的传输方法及系统、 发送端及接收端。
背景技术 蜂窝通信系统由于实现了对有限频谱资源的复用, 从而使得无线通信技 术得到了蓬勃发展。 在蜂窝系统中, 当两个用户设备(User Equipment, 简称 为 UE )之间有业务需要传输时, 用户设备 1 ( UE1 )到用户设备 2 ( UE2 ) 的业务数据, 会首先通过空口传输给基站 1 , 基站 1通过核心网将该用户数 据传输给基站 2,基站 2再将上述业务数据通过空口传输给 UE2。 UE2到 UE1 的业务数据传输釆用类似的处理流程。如图 1所示, 当 UE1和 UE2位于同一 个蜂窝小区, 那么虽然基站 1和基站 2是同一个站点, 然而一次数据传输仍 然会消耗两份无线频谱资源。 由此可见, 如果用户设备 1和用户设备 2位于同一小区并且相距较近, 那么上述的蜂窝通信方法显然不是最优的通信方式。 而实际上, 随着移动通 信业务的多样化, 例如, 社交网络、 电子支付等在无线通信系统中的应用越 来越广泛, 使得近距离用户之间的业务传输需求日益增长。 因此, 设备到设 备(Device-to-Device, 简称为 D2D ) 的通信模式日益受到广泛关注。 所谓 D2D, 如图 2所示, 是指业务数据不经过基站进行转发, 而是直接由源用户 设备通过空口传输给目标用户设备。 这种通信模式区别于传统蜂窝系统的通 信模式。 对于近距离通信的用户来说, D2D不但节省了无线频谱资源, 而且 降低了核心网的数据传输压力。基于蜂窝网的 D2D通信是一种在系统的控制 下, 在多个支持 D2D功能的终端设备之间直接进行通信的新型技术, 它能够 减少系统资源占用, 增加蜂窝通信系统频谱效率, 降低终端发射功耗, 并在 很大程度上节省网络运营成本。 在 D2D通信中, D2D业务数据的接收端可能是单个 UE, 也可能是多个 UE, 也即 D2D通信可能是单播(Unicast )通信, 也可能是广播( Broadcast ) 通信或者组播 ( Groupcast或 Group Communication )或者多播 ( Multicast )通 信。 在 D2D通信方案的考虑中, 对于上述通信模式的支持都需要考虑。 长期演进(Long Term Evolution, 简称为 LTE ) 系统、 高级长期演进 ( LTE-Advanced, 简称为 LTE-A ) 系统和高级国际移动通信 ( International Mobile Telecommunication Advanced, 简称为 IMT-Advanced )系统都是以正交 频分复用 ( Orthogonal Frequency Division Multiplexing, 简称为 OFDM )技术 为基础, OFDM系统为时频两维的数据形式。 一个 10ms的无线帧 (frame ) 由 10个子帧组成, 1个子帧 (subframe ) 由 2个连续时隙 (slot )组成, 即子 帧 i包括时隙 2i和 2i+l。正常循环前缀 ( Normal Cyclic Prefix, 简称为 Normal CP )时, 1个下行子帧由 14个 OFDM符号组成, 1个上行子帧由 14个 SC-FDMA ( single carrier-Frequency Division Multiple Access, 单载波 -频分多址)符号组 成; 扩展 CP ( Extended CP ) 时, 1个下行子帧由 12个 OFDM符号组成, 1 个上行子帧由 12个 SC-FDMA符号。 其中, 一个资源块(Resource Block, 简称为 RB ) 由频域上连续的 12个 子载波, 以及时域上连续 1个时隙内的所有 OFDM/SC-FDMA符号组成; 一 个资源块对 ( Resource Block pair, 简称为 RB pair ) 由频域上连续的 12个子 载波, 以及时域上连续 1个子帧内的所有 OFDM/SC-FDMA符号组成。 每个 OFDM/SC-FDMA符号上对应一个子载波的资源称为资源单元 ( Resource Element, 简称为 RE ) 。 在 LTE/LTE-A蜂窝通信中, 小区搜索是移动通信中非常关键的步骤, 是 终端与基站建立通信链路的前提。 无论是终端在服务小区中初始上电, 还是 在通信过程中进行小区切换, 都需要通过小区搜索过程和基站建立连接。 小 区搜索过程主要是为了使终端和所在小区取得时间同步和频率同步并获得物 理小区 ID, 系统带宽及其它小区广播信息。 通常终端通过同步信号, 首先获 得时间同步、 频率同步, 而后获得当前所处小区的相关信息, 如带宽、 小区 ID、 帧时钟信息、 小区天线配置、 CP长度等。 在 D2D通信中,源用户设备和目标用户设备进行数据传输的首要前提是 实现收发两端的时频同步, 目前关于 D2D同步的相关设计只有一个大致的同 步过程, 即 D2D接收端根据 D2D发送端发送的设备到设备同步信号 (D2D Synchronization Signal, 简称 D2DSS )获取与发送端的时频同步之后, 还要接 收来自 D2D 发送端发送的物理设备到设备同步信道 (Physical D2D Synchronization Channel , 简称 PD2DSCH ) , 从而获得 D2D发送端更为详细 的系统消息以及和后续数据接收相关的控制信息。 然而, 还没有任何实现细 节,其中包括 D2DSS和 PD2DSCH如何传输, D2DSS和 PD2DSCH之间的关 联等。 由于 D2D通信釆用上行资源(即 FDD的上行频带或者 TDD的上行子 帧 ) 进行传输, 因此 D2D UE 之间的同步过程和同步信令的设计都和 LTE/LTE-A系统中的同步有很大区别。
发明内容 本发明实施例提供一种 D2D通信同步信道的传输方法及系统、发送端及 接收端, 解决各种覆盖外场景下(覆盖外以及覆盖内 /半覆盖场景下)设备到 设备之间的同步问题。 为了解决上述技术问题, 本发明实施例提供了一种设备到设备通信同步 信道的传输方法, 包括: 设备到设备 D2D发送端发送设备到设备同步信号 D2DSS和物理设备到 设备同步信道 PD2DSCH, 其中, 在发送所述 PD2DSCH时, 所述 PD2DSCH 在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致,或者由所 述 D2DSS确定所述 PD2DSCH在子帧中的频域位置。 较佳地, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步 信号 SD2DSS; 其中, 所述 PD2DSS和所述 SD2DSS均以序列的形式发送, 所述 PD2DSS的序列种类为 M, M为小于等于 3的正整数; 所述 SD2DSS的 序列种类为 N, N为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 较佳地,所述 PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的 频域位置保持一致, 包括: 子帧中所述 PD2DSCH在频域上所占用的起始 RB索引与所述 D2DSS在 频域上所占用的起始 RB索引相同, 且所述 PD2DSCH在频域上所占用的 RB 个数与所述 D2DSS在频域上所占用的 RB个数相同。 较佳地,由所述 D2DSS确定所述 PD2DSCH在子帧中的频域位置,包括: 子帧中一个 D2DSS对应一个或多个 PD2DSCH; 所述 D2DSS分别指示 其对应的每个 PD2DSCH在子帧中频域上所占用的起始 RB索引以及所占用 的 RB个数。 较佳地,所述 D2DSS分别指示其对应的每个 PD2DSCH在子帧中频域上 所占用的起始 RB索引以及所占用的 RB个数, 包括: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB索引。 较佳地, 所述 SD2DSS的每种序列对应每个 PD2DSCH在子帧中频域上 所占用的起始 RB索引, 包括: 如果 N等于 D2DSS传输带宽所对应的 RB总数,则所述 SD2DSS的第 N 种序列对应每个 PD2DSCH在子帧中频域上所占用的起始 RB索引; 如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到值 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB索引, 其中, 所述 L为小于等于 D2DSS传输带宽所对应 的 RB总数的正整数。 较佳地, 所述方法还包括: 在发送所述 PD2DSCH时, 所述 PD2DSCH在时域上从所述 PD2DSS或 所述 SD2DSS 所占时域符号之后或之前的第一个可用单载波-频分多址 SC-FDMA符号开始的一个或连续多个可用 SC-FDMA符号上发送, 其中, 所 述 PD2DSCH所占的一个或连续多个可用 SC-FDMA符号的个数由网络侧预 先固定配置。 较佳地, 所述 D2DSCH所占的一个或连续多个可用 SC-FDMA符号的个 数为 4或 5或 6。 较佳地, 所述方法还包括: 无覆盖场景下, D2D发送端对 D2DSS的可用资源进行监听, 如果监听 到空闲资源, 则选择一个空闲的资源发送所述 D2DSS和所述 PD2DSCH; 如 果没有监听到可用资源, 则等待下一时刻重新监听; 或者有覆盖 /部分覆盖场 景下, D2D发送端在网络侧调度的可用资源上发送 D2DSS。 为了解决上述技术问题, 本发明实施例还提供了一种设备到设备通信同 步信道的传输方法, 包括: 设备到设备 D2D接收端接收来自 D2D发送端发送的设备到设备同步信 号 D2DSS 和物理设备到设备同步信道 PD2DSCH , 其中, 在接收所述 PD2DSCH 时, 在和所述 D2DSS 所在的频域位置相同的频域位置上接收 PD2DSCH; 或者在由所述 D2DSS确定的频域位置上接收 PD2DSCH。 较佳地, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步 信号 SD2DSS; 其中, PD2DSS和 SD2DSS均以序列的形式接收, PD2DSS 的序列种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类为 N, N 为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 较佳地, 所述在和所述 D2DSS 所在的频域位置相同的频域位置上接收 PD2DSCH, 包括: 在和所述 D2DSS 所占用的起始 RB 索引上接收 PD2DSCH, 且所述 PD2DSCH在频域所占用的 RB个数与所述 D2DSS所占用的 RB个数相同。 较佳地,所述在由所述 D2DSS确定的频域位置上接收 PD2DSCH, 包括:
Figure imgf000007_0001
在所述起始 RB 索引和所述 RB 个数对应的频域位置上接收所述 PD2DSCH。 较佳地, 所述方法还包括:
一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上接 收并解调所述 PD2DSCH。 较佳地, 所述方法还包括:
D2D接收端在所有 D2DSS可用资源上监听并接收 D2DSS, 完成和发送 端之间的初步时间同步和频率同步; 在接收并解调所述 PD2DSCH后, 根据所述 PD2DSCH中的信息完成对 业务信道的接收。
为了解决上述技术问题, 本发明实施例还提供了一种设备到设备通信的 发送端 , 包括: 生成模块, 其设置为: 生成设备到设备同步信号 D2DSS和物理设备到设 备同步信道 PD2DSCH; 以及 发送模块, 其设置为: 发送设备到设备同步信号 D2DSS和物理设备到设 备同步信道 PD2DSCH; 其中, 在发送所述 PD2DSCH时, 所述 PD2DSCH在 子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致; 或者, 由所 述 D2DSS确定所述 PD2DSCH在子帧中的频域位置。 较佳地, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步 信号 SD2DSS; 其中, 所述 PD2DSS和所述 SD2DSS均以序列的形式发送, 所述 PD2DSS的序列种类为 M, M为小于等于 3的正整数; 所述 SD2DSS的 序列种类为 N, N为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 较佳地, 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH时, 将 PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一 致: 子帧中所述 PD2DSCH在频域上所占用的起始 RB索引与所述 D2DSS在 频域上所占用的起始 RB索引相同, 且所述 PD2DSCH在频域上所占用的 RB 个数与所述 D2DSS在频域上所占用的 RB个数相同。 较佳地, 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH时, 由所述 D2DSS确定 PD2DSCH在子帧中的频域位置: 在发送所述 PD2DSCH 时, 子帧中一个 D2DSS 对应一个或多个 PD2DSCH; 所述 D2DSS分别指示其对应的每个 PD2DSCH在子帧中频域上 所占用的起始 RB索引以及所占用的 RB个数。 较佳地, 所述发送模块是设置为以如下方式在发送所述 PD2DSCH时, 由所述 D2DSS分别指示每个 PD2DSCH在子帧中频域上所占用的起始 RB索 引以及所占用的 RB个数: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB索引。 较佳地, 所述 SD2DSS的每种序列对应每个 PD2DSCH在子帧中频域上 所占用的起始 RB索引, 包括: 如果 N小于等于 D2DSS传输带宽所对应的 RB总数, 则所述 SD2DSS 的第 N种序列对应每个 PD2DSCH在子帧中频域上所占用的起始 RB索引; 如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到的 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB索引, 所述 L为小于等于 D2DSS传输带宽所对应的 RB 总数的正整数。 较佳地, 所述发送模块, 还设置为在发送所述 PD2DSCH 时, 所述 PD2DSCH在时域上从所述 PD2DSS或所述 SD2DSS所占时域符号之后或之 前的第一个可用单载波-频分多址 SC-FDMA符号开始的一个或连续多个可用 SC-FDMA符号上发送, 其中, 所述 PD2DSCH所占的连续 4或 5或 6个可用 SC-FDMA符号的个数由网络侧预先固定配置。 较佳地, 所述发送端还包括: 资源选择模块, 其设置为: 在无覆盖场景下, 对 D2DSS的可用资源进行 监听, 如果监听到空闲资源, 则选择一个空闲的资源通知发送模块发送所述 D2DSS和所述 PD2DSCH; 如果没有监听到可用资源, 则等待下一时刻重新 监听; 或者在覆盖 /部分覆盖场景下, 釆用网络侧调度的可用资源通知发送模 块在网络侧调度的可用资源上发送 D2DSS。 为了解决上述技术问题, 本发明实施例还提供了一种设备到设备通信的 接收端, 包括: 接收模块, 其设置为: 接收来自 D2D 发送端的设备到设备同步信号 D2DSS和物理设备到设备同步信道 PD2DSCH,其中,在接收所述 PD2DSCH 时, 在和所述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH; 或 者, 在由所述 D2DSS确定的频域位置上接收 PD2DSCH; 处理模块, 其设置为: 对接收到的所述 PD2DSCH解调, 并根据所述 PD2DSCH中的信息完成对业务信道的接收。 较佳地, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步 信号 SD2DSS; 其中, PD2DSS和 SD2DSS均以序列的形式接收, PD2DSS 的序列种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类为 N, N 为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 较佳地, 所述接收模块, 是设置为以如下方式在接收所述 PD2DSCH时, 在和所述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH: 在和所述 D2DSS 所占用的起始 RB 索引上接收 PD2DSCH, 且所述 PD2DSCH在频域所占用的 RB个数与所述 D2DSS所占用的 RB个数相同。 较佳地, 所述接收模块, 是设置为以如下方式在接收所述 PD2DSCH时, 在由所述 D2DSS确定的频域位置上接收 PD2DSCH:
Figure imgf000010_0001
在所述起始 RB 索引和所述 RB 个数对应的频域位置上接收上述 PD2DSCH。 较佳地, 所述接收模块, 还设置为在接收所述 PD2DSCH时, 在时域上 从所述 PD2DSS 或所述 SD2DSS 所占时域符号之后或之前的第一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上接收并解调所 述 PD2DSCH。 较佳地, 所述接收模块包括: 第一模块, 其设置为: 在所有 D2DSS可用资源上监听并接收 D2DSS, 完成和发送端之间的初步时间同步和频率同步; 以及 第二模块, 其设置为: 在和所述 D2DSS所在的频域位置相同的频域位置 上接收 PD2DSCH; 或者在由所述 D2DSS确定的频域位置上接收 PD2DSCH。
为了解决上述技术问题, 本发明实施例还提供了一种设备到设备通信同 步信道的传输系统, 包括: 如上所述的发送端和如上所述的接收端。
本发明实施例还提供一种计算机程序, 包括程序指令, 当该程序指令被 设备到设备发送端执行时, 使得该发送端可执行上述方法。
本发明实施例还提供另一种计算机程序, 包括程序指令, 当该程序指令 被设备到设备接收端执行时, 使得该接收端可执行上述方法。
本发明实施例还提供一种载有上述计算机程序的载体。
本发明实施例提供的 D2D通信同步信道的传输方法及系统、发送端及接 收端, 解决了覆盖外以及覆盖内 /半覆盖场景下设备到设备之间的同步问题。 附图概述
图 1是相关技术中 UE位于同一基站小区时的蜂窝通信示意图; 图 2是相关技术中一种优选的 D2D通信系统示意图;
图 3是实施例中 D2D发送端发送 PD2DSCH的具体过程流程图; 图 4是实施例中 D2D接收端接收 PD2DSCH的具体过程流程图; 图 5是实施例中设备到设备通信同步信道的传输系统结构图;
图 6是应用示例 1中一种 PD2DSCH在子帧中的频域位置和 D2DSS在子 帧中的频域位置保持一致的时频位置示意图;
图 7是应用示例 1中另一种 PD2DSCH在子帧中的频域位置和 D2DSS在 子帧中的频域位置保持一致的时频位置示意图;
图 8是应用示例 2中一种 PD2DSCH所在频域位置由 D2DSS确定的时频 位置示意图;
图 9是应用示例 2中另一种 PD2DSCH所在频域位置由 D2DSS确定的时 频位置示意图;
图 10是应用示例 3中 3个 D2DSS对应多个 PD2DSCH, 且 PD2DSCH 所在频域位置由 D2DSS确定的时频位置示意图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
实施例:
本实施例提供了一种设备到设备通信同步信道的传输方法, 应用于 D2D 发送端 , 包括: D2D发送端发送 D2DSS和 PD2DSCH,其中,在发送所述 PD2DSCH时, 所述 PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持 一致, 或者所述 PD2DSCH在子帧中的频域位置由所述 D2DSS确定。 其中, 所述 D2DSS包括: D2D主同步信号( Primary D2D Synchronization Signal,简称 PD2DSS )和 /或 D2D辅同步信号( Secondary D2D Synchronization Signal, 简称 SD2DSS ) ; 其中, PD2DSS和 SD2DSS均以序列的形式发送, PD2DSS的序列种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类 为 N, N为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 所述 PD2DSCH以数据包的形式发送, 其中携带的信息包括: D2D同步 信号发送端的 ID信息, 和 /或 D2D同步信号发送端的类型, 和 /或 D2D通信 的系统带宽, 和 /或 D2D的子帧配置信息, 和 /或 D2D发送端后续用于发送业 务数据所用的时频资源, 和 /或业务数据的传输时长, 和 /或业务相关的控制信 息、 功率控制等内容。 作为一种优选的方式, 所述 PD2DSCH 在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致, 包括: 子帧中所述 PD2DSCH在频域上所占用的起始 RB index与所述 D2DSS 在频域上所占用的起始 RB index相同, 且 PD2DSCH在频域上所占用的 RB 个数与所述 D2DSS在频域上所占用的和 RB个数相同。 也就是所, 子帧中包 含的 PD2DSCH和 D2DSS的个数是严格——对应的, 即一个 D2DSS唯一对 应一个 PD2DSCH。 作为一种优选的方式, 所述 PD2DSCH 在子帧中的频域位置由所述 D2DSS确定, 包括: 子帧中一个 D2DSS对应一个或多个 PD2DSCH; 所述 D2DSS分别指示 每个 PD2DSCH在子帧中频域上所占用的起始 RB index以及所占用的 RB个 数。 这里, 与通过信令等直接指示的方式不同, 确定是指并不是 D2DSS直接 包含指示的内容, 即起始 RB index以及所占用的 RB个数, 而是将用作接收 端同步的序列 (PD2DSS的序列和 SD2DSS的序列 )增加了新的含义, 用来 个数。 其中,所述 D2DSS分别指示每个 PD2DSCH在子帧中频域上所占用的起 始 RB index以及所占用的 RB个数, 包括: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的
RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB index。 例如, M=3 , PD2DSS中的 3种不同的序列分别对应 0~2中一个数值, 该数值和 PD2DSCH所占用的 RB个数进行绑定。 序列 1对应数值 0, 表示 PD2DSCH占用 X个 RB; 序歹' J 2对应数值 1 , 表示 PD2DSCH占用 Y个 RB; 序列 3对应数值 2表示 PD2DSCH占用 Z个 RB, 其中 X, Υ, Z取值为各不 相同的正整数, 优选值是 X=2, Y=4, Ζ=6, 具体由网络侧预先固定配置。 较佳地, SD2DSS中的 Ν种不同的序列分别对应 0 ~ Ν-1中的一个数值, 该数值指示了 PD2DSCH所占用的起始 RB index, 其中, 如果 N小于等于 D2DSS传输带宽所对应的 RB总数, 则所述 SD2DSS的第 N种序列对应每个
如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到值 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB index,其中, 所述 L为小于等于 D2DSS传输带宽所对应 的 RB总数的正整数。 此夕卜,在发送所述 PD2DSCH时,所述 PD2DSCH在时域上从所述 PD2DSS 或所述 SD2DSS所占时域符号之后或之前的第一个可用 SC-FDMA符号开始 的一个或连续多个可用 SC-FDMA符号上发送, 其中, 所述 PD2DSCH所占 的一个或连续多个可用 SC-FDMA符号的个数由网络侧预先固定配置, 优选 之前均是由网络侧预先固定配置。 作为一种优选的方式, 如图 3所示, 无覆盖场景下, 所述 D2D发送端发 送 PD2DSCH的过程包括:
S101 : D2D发送端首先对 D2DSS的可用资源进行监听;
S102: 判断是否监听到空闲资源, 如果是, 则执行步骤 S103 , 如果否, 则执行步骤 S 104;
S103 : 监听到空闲资源, 则选择一个空闲的资源发送 D2DSS 和 PD2DSCH;
S104: D2D发送端没有监听到可用资源, 则等待下一时刻重新监听, 并 根据监听结果选择是否发送 D2DSS和 PD2DSCH。 此外, 在覆盖内 /半覆盖场景下, 作为一种优选的方式, 所述 D2D发送 端根据基站指示的可用资源在网络侧的调度下发送 D2DSS。 其中, 在发送 PD2DSCH时, 釆用 PD2DSCH在子帧中的频域位置和所 述 D2DSS在子帧中的频域位置保持一致的方式发送, 或者,釆用 PD2DSCH在子帧中的频域位置由所述 D2DSS确定的方式发 送。
本实施例还提供了一种设备到设备通信同步信道的传输方法, 应用于 D2D接收端, 包括:
D2D发送端接收来自 D2D发送端发送的 D2DSS和 PD2DSCH, 其中, D2D接收端首先接收 D2DSS,然后在接收所述 PD2DSCH时,所述 PD2DSCH 在和所述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH; 或者在 由所述 D2DSS确定的频域位置上接收 PD2DSCH。 其中, 所述在和所述 D2DSS 所在的频域位置相同的频域位置上接收
PD2DSCH, 包括: 在和所述 D2DSS所占用的起始数据块 RB index上接收 PD2DSCH,且所 即, 每个 D2DSS唯一对应一个 PD2DSCH。 其中, 所述在由所述 D2DSS确定的频域位置上接收 PD2DSCH, 包括:
Figure imgf000015_0001
其中, SD2DSS的序列是 N种序列中的一种,对应 0 ~ N-1中的一个数值, 该数值指示了 PD2DSCH在子帧中频域上所占用的起始 RB index; PD2DSS 的序列是 M种序列中的一种, 对应 0 ~ M-1 中的一个数值, 该数值指示了 PD2DSCH占用的 RB个数。 在所述起始 RB index和所述 RB个数对应的频域位置上接收 PD2DSCH。 此外, 本方法还包括:
一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上接 收并解调所述 PD2DSCH。 作为一种优选的方式, 如图 4所示, 所述 D2D接收端接收 PD2DSCH的 具体过程包括:
S201 : D2D接收端在所有 D2DSS可用资源上监听并接收 D2DSS, 完成 和发送端之间的初步时间同步和频率同步;
S202: D2D接收端在和 D2DSS所占用的 RB index相同的 RB index, 或 者, D2DSS 确定的起始 RB index和所述 RB 个数对应的频域位置上接收 PD2DSCH, 以及从 PD2DSS或 SD2DSS之后或之前的第一个可用 SC-FDMA 符号开始的连续 4或 5或 6个可用 SC-FDMA符号上,接收并解调 PD2DSCH;
S203: 在接收并解调所述 PD2DSCH后, 根据所述 PD2DSCH中的信息 完成对业务信道的接收。
如图 5所示, 本实施例还提供了一种设备到设备通信同步信道的传输系 统, 包括: D2D通信的发送端和 D2D通信的接收端, 其中: 发送端 , 包括: 生成模块,其设置为生成设备到设备同步信号 D2DSS和物理设备到设备 同步信道 PD2DSCH; 发送模块,其设置为发送设备到设备同步信号 D2DSS和物理设备到设备 同步信道 PD2DSCH; 其中, 在发送所述 PD2DSCH时, 所述 PD2DSCH在子 帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致; 或者, 所述 PD2DSCH在子帧中的频域位置由所述 D2DSS确定。 其中, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步信 号 SD2DSS; 其中, 所述 PD2DSS和所述 SD2DSS均以序列的形式发送, 所 述 PD2DSS的序列种类为 M, M为小于等于 3的正整数; 所述 SD2DSS的序 列种类为 N, N为大于或等于 D2D传输带宽所对应的 RB总数的正整数。 其中, 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH时, 将 PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一 致, 包括: 子帧中所述 PD2DSCH在频域上所占用的起始 RB索引与所述 D2DSS在 频域上所占用的起始 RB索引,且和 PD2DSCH在频域上所占用的 RB个数与 所述 D2DSS在频域上所占用 RB个数相同。 作为一种优选的方式, 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH时, 由所述 D2DSS确定 PD2DSCH在子帧中的频域位置: 在发送所述 PD2DSCH 时, 子帧中一个 D2DSS 对应一个或多个 PD2DSCH; 所述 D2DSS分别指示每个 PD2DSCH在子帧中频域上所占用的 起始 RB索引以及所占用的 RB个数。 作为另一种优选的方式, 所述发送模块, 是设置为以如下方式在发送所 述 PD2DSCH时, 由所述 D2DSS分别指示每个 PD2DSCH在子帧中频域上所 占用的起始 RB索引以及所占用的 RB个数: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB索引。 其中, 所述 SD2DSS的每种序列对应每个 PD2DSCH在子帧中频域上所 占用的起始 RB索引, 包括: 如果 N小于等于 D2DSS传输带宽所对应的 RB总数, 则所述 SD2DSS 的第 N种序列对应每个 PD2DSCH在子帧中频域上所占用的起始 RB索引; 如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到的 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB索引, 所述 L为小于等于 D2DSS传输带宽所对应的 RB 总数的正整数。 此外,所述发送模块,还设置为在发送所述 PD2DSCH时,所述 PD2DSCH 可用单载波-频分多址 SC-FDMA符号开始的一个或连续多个可用 SC-FDMA 符号上发送, 其中, 所述 PD2DSCH所占的连续 4或 5或 6个可用 SC-FDMA 符号的个数由网络侧预先固定配置。
此外, 所述发送端还包括: 资源选择模块, 其设置为在无覆盖场景下,对 D2DSS的可用资源进行监 听, 如果监听到空闲资源, 则选择一个空闲的资源通知发送模块发送所述 D2DSS和所述 PD2DSCH; 如果没有监听到可用资源, 则等待下一时刻重新 监听; 或者在覆盖 /部分覆盖场景下, 釆用网络侧调度的可用资源通知发送模 块在网络侧调度的可用资源上发送 D2DSS。
接收端, 包括: 接收模块,其设置为接收来自 D2D发送端的设备到设备同步信号 D2DSS 和物理设备到设备同步信道 PD2DSCH, 其中, 在接收所述 PD2DSCH时, 在 和所述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH; 或者, 在 由所述 D2DSS确定的频域位置上接收 PD2DSCH; 处理模块, 其设置为对接收到的所述 PD2DSCH 解调, 并根据所述 PD2DSCH中的信息完成对业务信道的接收。 其中, 所述 D2DSS包括: D2D主同步信号 PD2DSS和 /或 D2D辅同步信 号 SD2DSS; 其中, PD2DSS和 SD2DSS均以序列的形式接收, PD2DSS的 序列种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类为 N, N为 大于或等于 D2D传输带宽所对应的 RB总数的正整数。 作为一种优选的方式, 所述接收模块, 是设置为以如下方式在接收所述
PD2DSCH 时, 在和所述 D2DSS 所在的频域位置相同的频域位置上接收 PD2DSCH: 在和所述 D2DSS所占用的起始数据块 RB索引上接收 PD2DSCH, 且所
作为另一种优选的方式, 所述接收模块, 是设置为以如下方式在接收所 述 PD2DSCH时, 在由所述 D2DSS确定的频域位置上接收 PD2DSCH: 在所述起始 RB 索引和所述 RB 个数对应的频域位置上接收上述 PD2DSCH。 此外, 所述接收模块, 还设置为在接收所述 PD2DSCH时, 在时域上从 所述 PD2DSS 或所述 SD2DSS 所占时域符号之后或之前的第一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上接收并解调所 述 PD2DSCH。 其中, 所述接收模块包括: 第一模块, 其设置为在所有 D2DSS可用资源上监听并接收 D2DSS, 完 成和发送端之间的初步时间同步和频率同步; 第二模块,其设置为在和所述 D2DSS所在的频域位置相同的频域位置上 接收 PD2DSCH; 或者在由所述 D2DSS确定的频域位置上接收 PD2DSCH。
本实施例还提供一种计算机程序, 包括程序指令, 当该程序指令被设备 到设备发送端执行时, 使得该发送端可执行上述方法。
本实施例还提供另一种计算机程序, 包括程序指令, 当该程序指令被设 备到设备接收端执行时, 使得该接收端可执行上述方法。
本实施例还提供一种载有上述计算机程序的载体。
应用示例 1 ( PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的 频域位置保持一致) 该方案中,每子帧中包含的 PD2DSCH和 D2DSS的个数是严格——对应 的, 即每个 D2DSS唯一对应一个 PD2DSCH。 如图 6所示, 整个 D2D传输带 宽中共有 3组同步信号的可用资源, 其中: 保护间隔用于 D2D UE的收发转换所需的时间。 第 1组中的 PD2DSCH所在的 RB index和第 1组 D2DSS所在的 RB index 完全一致, RB个数也相同; PD2DSCH所在的时域符号从 SD2DSS所占时域 符号之后的第一个可用 SC-FDMA符号开始的连续 4个可用 SC-FDMA符号 上。 第 2组中的 PD2DSCH所在的 RB index和第 2组 D2DSS所在的 RB index 完全一致, RB个数也相同; PD2DSCH所在的时域符号从 PD2DSS所占时域 符号之后的第一个可用 SC-FDMA符号开始的连续 6个可用 SC-FDMA符号 上。 第 3组的 PD2DSCH所在的 RB index和第 3组 D2DSS所在的 RB index 完全一致, RB个数也相同; PD2DSCH所在的时域符号从 PD2DSS所占时域 符号之后的第一个可用 SC-FDMA符号开始的连续 5个可用 SC-FDMA符号 上。 其中, D2D发送端发送 PD2DSCH的过程包括:
然后, 选择一个空闲的资源发送 D2DSS和 PD2DSCH, 发送规则是: 如果第 1组空闲, 则 D2D发送端在第 1组 D2DSS所在的 RB index, 以 及从 SD2DSS所占时域符号之后的第一个可用 SC-FDMA符号开始的连续 4 个可用 SC-FDMA符号上发送 PD2DSCH。 如果第 2组空闲, 则 D2D发送端在第 2组 D2DSS所在的 RB index, 以 及从 PD2DSS所占时域符号之后的第一个可用 SC-FDMA符号开始的连续 6 个可用 SC-FDMA符号上发送 PD2DSCH。 如果第 3组空闲, 则 D2D发送端在第 3组 D2DSS所在的 RB index, 以 及从 PD2DSS所占时域符号之后的第一个可用 SC-FDMA符号开始的连续 5 个可用 SC-FDMA符号上发送 PD2DSCH。 如果没有空闲资源, 则等待下一时刻重新监听, 并根据监听结果选择是 否发送 D2DSS和 PD2DSCH。 其中, D2D接收端接收解调 PD2DSCH的过程包括: 首先, D2D接收端在上述 3组 D2DSS可用资源上监听并接收 D2DSS, 根据 PD2DSS和 SD2DSS在时域上的相对位置关系, 可以获知 D2DSS所在 RB index, 并完成和发送端之间的初步时间同步和频率同步; 然后, 如果 D2D接收端在第 1组同步资源上接收到了 D2DSS信号, 则 D2D接收端在和 D2DSS所占用的 RB index相同的 RB index,以及从 SD2DSS 所占时域符号之后的第一个可用 SC-FDMA符号开始的连续 4 个可用 SC-FDMA符号上接收并解调 PD2DSCH。 如果 D2D接收端在第 2组同步资 源上接收到了 D2DSS信号, 则 D2D接收端在和 D2DSS所占用的 RB index 相同的 RB index,以及从 PD2DSS所占时域符号之后的第一个可用 SC-FDMA 符号开始的连续 6个可用 SC-FDMA符号上接收并解调 PD2DSCH。如果 D2D 接收端在第 3组同步资源上接收到了 D2DSS信号,则 D2D接收端在和 D2DSS 所占用的 RB index相同的 RB index, 以及从 PD2DSS所占时域符号之后的第 一个可用 SC-FDMA符号开始的连续 5个可用 SC-FDMA符号上接收并解调 PD2DSCH。 最后, D2D接收端根据 PD2DSCH中的信息完成对业务信道的接收。 此外, 如图 7所示, 每组中的 D2DSS的频域位置和时域位置与图 6中的 相同。 每组的 PD2DSCH 所在的频域位置不变, 与图 6 相同, 每组中的 PD2DSCH所在的 RB index和每组 D2DSS所在的 RB index完全一致, RB个 数也相同; 但是, 第 1组中 PD2DSCH所在的时域符号从 PD2DSS所占时域 符号之前的第一个可用 SC-FDMA符号开始的连续 5个可用 SC-FDMA符号 上; 第 2组中 PD2DSCH所在的时域符号从 SD2DSS所占时域符号之前的第 一个可用 SC-FDMA符号开始的连续 4个可用 SC-FDMA符号上; 第 3组中 PD2DSCH 所在的时域符号从 PD2DSS 所占时域符号之前的第一个可用 SC-FDMA符号开始的连续 5个可用 SC-FDMA符号上。 在发送端选择一个空闲的资源发送 PD2DSCH时,如图 7所示,从 PD2DSS 或 SD2DSS所占时域符号之前的第一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上发送 PD2DSCH。 在接收端在上述 3组 D2DSS可用资源上监听并接收 D2DSS时, 如图 7 所示, 从 PD2DSS或 SD2DSS所占时域符号之前的第一个可用 SC-FDMA符 号开始的连续 4或 5或 6个可用 SC-FDMA符号上接收并解调 PD2DSCH。
应用示例 2 ( PD2DSCH所在频域位置由 D2DSS确定) 该方案中,每子帧中包含的 PD2DSCH和 D2DSS的个数可以不是——对 应的, 即一个 D2DSS可以和多个 PD2DSCH相关联。 如图 8所示, 整个 D2D 传输带宽中共有 1组同步信号的可用资源,该同步信号对应了 4个 PD2DSCH。 其中, PD2DSS频域所在位置的确定方式是: PD2DSS中携带了 3种不同的序 歹 |J , 这 3种序列具体对应 0, 1 , 2中的一个数值, 该数值和 PD2DSCH所占 用的 RB个数进行绑定。例如, 0表示 PD2DSCH占用 2个 RB; 1表示 PD2DSCH 占用 4个 RB; 2表示 PD2DSCH占用 6个 RB。 SD2DSS中携带了 168种不同 的序列, 这 168种序列具体对应 0 ~ 167中的一个数值, 该数值和 PD2DSCH 所占 RB的起始 RB index——绑定。
PD2DSS 时域所在位置的确定方式是: PD2DSCH在时域上从 PD2DSS 或 SD2DSS所占时域符号之后的第一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上, 其中, PD2DSCH所占的时域符号个数是固 定的, 可以 4或 5或 6个可用 SC-FDMA符号, 并由网络侧预先固定配置, 图 8中以 6个可用 SC-FDMA符号为例。 此外, PD2DSS时域所在位置的确定方式也可以是: PD2DSCH在时域上 从 PD2DSS或 SD2DSS所占时域符号之前的第一个可用 SC-FDMA符号开始 的连续 4或 5或 6个可用 SC-FDMA符号上,如图 9所示,以 4个可用 SC-FDMA 符号为例。
其中, D2D发送端发送 PD2DSCH的过程包括:
D2D发送端首先对上述唯一的 D2DSS可用资源进行监听; 资源空闲时发送 D2DSS , 其中, 利用 PD2DSS 携带的序列用来指示
PD2DSCH占用的 RB个数, 利用 SD2DSS中携带的序列用来指示 PD2DSCH 所占 RB的起始 RB index, 以及从 PD2DSS或 SD2DSS所占时域符号之后或 之前的第一个可用 SC-FDMA符号开始的连续 6或 4个可用 SC-FDMA符号 上发送 PD2DSCH。 如图 8和图 9所示, 对应于 PD2DSCH 1 , PD2DSS携带的序列对应数值 1 , 即釆用 1所对应 的序列发送 PD2DSS, 1表示 PD2DSCH占用 4个 RB; SD2DSS携带的序列 对应数值 0,即釆用 0所对应的序列发送 SD2DSS, 1表示 PD2DSCH所占 RB 的起始 RB index为 0, 所以, 发送 PD2DSCH 1时, 起始位置为 RB 0, 占用 4个 RB; 对应于 PD2DSCH 2, PD2DSS携带的序列对应数值 2, 即釆用 2所对应 的序列发送 PD2DSS, 2表示 PD2DSCH占用 6个 RB; SD2DSS携带的序列 对应数值 Μ, Μ为 0 ~ 167中的一个值,即釆用 M所对应的序列发送 SD2DSS, Μ表示 PD2DSCH所占 RB的起始 RB index为 M, 所以, 发送 PD2DSCH2 时, 起始位置为 RB M, 占用 6个 RB。 对应于 PD2DSCH 3和 PD2DSCH 4, PD2DSS携带的序列对应数值 0, 即釆用 0所对应的序列发送 D2DSS, 0表示 PD2DSCH占用 2个 RB; SD2DSS 携带的序列分别对应数值 N和 0, N和 0均对应为 0 ~ 167中的一个值, 即 分别釆用 N和 0所对应的序列发送 SD2DSS, N和 0表示 PD2DSCH3和 PD2DSCH 4所占 RB的起始 RB index为 N和 0。 所以,发送 PD2DSCH 3 和 PD2DSCH 4时, 起始位置分别为 RB N和 RB O, 均占用 2个 RB。
其中, D2D接收端接收解调 PD2DSCH的过程包括: 首先, D2D接收端在上述唯一的 D2DSS可用资源上监听并接收 D2DSS, 根据 PD2DSS 所携带的序列可以获知 PD2DSCH 所占的 RB 个数; 根据 SD2DSS所携带的序列可以获知 PD2DSCH所占的 RB的起始位置,同时完成 和发送端之间的初步时间同步和频率同步; 然后, D2D接收端根据 D2DSS的指示, 到相应的时频资源上接收并解 调 PD2DSCH。 即, 利用 PD2DSS携带的序列用来指示 PD2DSCH占用的 RB个数, 利 用 SD2DSS中携带的序列用来指示 PD2DSCH所占 RB的起始 RB index, 以 及从 PD2DSS或 SD2DSS所占时域符号之后或之前的第一个可用 SC-FDMA 符号开始的连续 6或 4个可用 SC-FDMA符号上接收并解调 PD2DSCH。 最后, D2D接收端根据 PD2DSCH中的信息完成对业务信道的接收。
应用示例 3 ( PD2DSCH所在频域位置由 D2DSS确定) 如图 10所示,有 3组 D2DSS的可用资源, 且每组 D2DSS的可用资源都 对应了 1或多个 PD2DSCH, 指示方式同应用示例 2所述。 从上述实施例可以看出,上述实施例中提供的 D2D通信同步信道的传输 方法及系统、 发送端及接收端, 解决了各种覆盖外场景下设备到设备之间的 同步问题。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上所述仅为本发明的优选实施例而已, 并非用于限定本发明的保护范 围。 根据本发明的发明内容, 还可有其他多种实施例, 在不背离本发明精神 改变和变形, 凡在本发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。
工业实用性 本发明实施例解决了覆盖外以及覆盖内 /半覆盖场景下设备到设备之间 的同步问题。

Claims

权 利 要 求 书
1、 一种设备到设备通信同步信道的传输方法, 包括: 设备到设备 D2D发送端发送设备到设备同步信号 D2DSS和物理设备到 设备同步信道 PD2DSCH, 其中, 在发送所述 PD2DSCH时, 所述 PD2DSCH 在子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致,或者由所 述 D2DSS确定所述 PD2DSCH在子帧中的频域位置。
2、 如权利要求 1所述的方法, 其中: 所述 D2DSS 包括: D2D主同步信号 PD2DSS 和 /或 D2D辅同步信号 SD2DSS; 其中, 所述 PD2DSS和所述 SD2DSS均以序列的形式发送, 所述 PD2DSS的序列种类为 M, M为小于等于 3的正整数; 所述 SD2DSS的序列 种类为 Ν, Ν为大于或等于 D2D传输带宽所对应的资源块 RB总数的正整数。
3、 如权利要求 2所述的方法, 其中: 所述 PD2DSCH在子帧中的频域位置和所述 D2DSS在子帧中的频域位置 保持一致, 包括: 子帧中所述 PD2DSCH在频域上所占用的起始 RB索引与所述 D2DSS在 频域上所占用的起始 RB索引相同, 且所述 PD2DSCH在频域上所占用的 RB 个数与所述 D2DSS在频域上所占用的 RB个数相同。
4、 如权利要求 2所述的方法, 其中: 由所述 D2DSS确定所述 PD2DSCH在子帧中的频域位置, 包括: 子帧中一个 D2DSS对应一个或多个 PD2DSCH; 所述 D2DSS分别指示 其对应的每个 PD2DSCH在子帧中频域上所占用的起始 RB索引以及所占用 的 RB个数。
5、 如权利要求 4所述的方法, 其中: 所述 D2DSS分别指示其对应的每个 PD2DSCH在子帧中频域上所占用的 起始 RB索引以及所占用的 RB个数, 包括: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB索引。
6、 如权利要求 5所述的方法, 其中: 所述 SD2DSS的每种序列对应每个 PD2DSCH在子帧中频域上所占用的 起始 RB索引, 包括: 如果 N等于 D2DSS传输带宽所对应的 RB总数,则所述 SD2DSS的第 N 种序列对应每个 PD2DSCH在子帧中频域上所占用的起始 RB索引; 如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到值 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB索引, 其中, 所述 L为小于等于 D2DSS传输带宽所对应 的 RB总数的正整数。
7、 如权利要求 3或 4或 5或 6所述的方法, 所述方法还包括: 在发送所述 PD2DSCH时, 所述 PD2DSCH在时域上从所述 PD2DSS或 所述 SD2DSS 所占时域符号之后或之前的第一个可用单载波-频分多址 SC-FDMA符号开始的一个或连续多个可用 SC-FDMA符号上发送, 其中, 所 述 PD2DSCH所占的一个或连续多个可用 SC-FDMA符号的个数由网络侧预 先固定配置。
8、 如权利要求 7所述的方法, 其中: 所述 D2DSCH所占的一个或连续 多个可用 SC-FDMA符号的个数为 4或 5或 6。
9、 如权利要求 3或 4或 5或 6所述的方法, 所述方法还包括: 无覆盖场景下, D2D发送端对 D2DSS的可用资源进行监听, 如果监听 到空闲资源, 则选择一个空闲的资源发送所述 D2DSS和所述 PD2DSCH; 如 果没有监听到可用资源, 则等待下一时刻重新监听; 或者有覆盖 /部分覆盖场 景下, D2D发送端在网络侧调度的可用资源上发送 D2DSS。
10、 一种设备到设备通信同步信道的传输方法, 包括: 设备到设备 D2D接收端接收来自 D2D发送端发送的设备到设备同步信 号 D2DSS 和物理设备到设备同步信道 PD2DSCH , 其中, 在接收所述 PD2DSCH 时, 在和所述 D2DSS 所在的频域位置相同的频域位置上接收 PD2DSCH; 或者在由所述 D2DSS确定的频域位置上接收 PD2DSCH。
11、 如权利要求 10所述的方法, 其中: 所述 D2DSS 包括: D2D主同步信号 PD2DSS 和 /或 D2D辅同步信号 SD2DSS; 其中, PD2DSS和 SD2DSS均以序列的形式接收, PD2DSS的序列 种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类为 N, N为大于 或等于 D2D传输带宽所对应的资源块 RB总数的正整数。
12、 如权利要求 11所述的方法, 其中: 所述在和所述 D2DSS 所在的频域位置相同的频域位置上接收 PD2DSCH, 包括: 在和所述 D2DSS 所占用的起始 RB 索引上接收 PD2DSCH, 且所述 PD2DSCH在频域所占用的 RB个数与所述 D2DSS所占用的 RB个数相同。
13、 如权利要求 11所述的方法, 其中: 所述在由所述 D2DSS确定的频域位置上接收 PD2DSCH, 包括:
Figure imgf000027_0001
在所述起始 RB 索引和所述 RB 个数对应的频域位置上接收所述 PD2DSCH。
14、 如权利要求 12或 13所述的方法, 所述方法还包括:
一个可用 SC-FDMA符号开始的连续 4或 5或 6个可用 SC-FDMA符号上接 收并解调所述 PD2DSCH。
15、 如权利要求 14所述的方法, 所述方法还包括:
D2D接收端在所有 D2DSS可用资源上监听并接收 D2DSS, 完成和发送 端之间的初步时间同步和频率同步; 在接收并解调所述 PD2DSCH后, 根据所述 PD2DSCH中的信息完成对 业务信道的接收。
16、 一种设备到设备通信的发送端, 包括: 生成模块, 其设置为: 生成设备到设备同步信号 D2DSS和物理设备到设 备同步信道 PD2DSCH; 以及 发送模块, 其设置为: 发送设备到设备同步信号 D2DSS和物理设备到设 备同步信道 PD2DSCH; 其中, 在发送所述 PD2DSCH时, 所述 PD2DSCH在 子帧中的频域位置和所述 D2DSS在子帧中的频域位置保持一致; 或者, 由所 述 D2DSS确定所述 PD2DSCH在子帧中的频域位置。
17、 如权利要求 16所述的发送端, 其中: 所述 D2DSS 包括: D2D主同步信号 PD2DSS 和 /或 D2D辅同步信号 SD2DSS; 其中, 所述 PD2DSS和所述 SD2DSS均以序列的形式发送, 所述 PD2DSS的序列种类为 M, M为小于等于 3的正整数; 所述 SD2DSS的序列 种类为 Ν, Ν为大于或等于 D2D传输带宽所对应的资源块 RB总数的正整数。
18、 如权利要求 17所述的发送端, 其中: 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH 时, 将 PD2DSCH在子帧中的频域位置和所述 D2DSS 在子帧中的频域位置保持一 致: 子帧中所述 PD2DSCH在频域上所占用的起始 RB索引与所述 D2DSS在 频域上所占用的起始 RB索引相同, 且所述 PD2DSCH在频域上所占用的 RB 个数与所述 D2DSS在频域上所占用的 RB个数相同。
19、 如权利要求 17所述的发送端, 其中: 所述发送模块, 是设置为以如下方式在发送所述 PD2DSCH时, 由所述 D2DSS确定 PD2DSCH在子帧中的频域位置: 在发送所述 PD2DSCH 时, 子帧中一个 D2DSS 对应一个或多个 PD2DSCH; 所述 D2DSS分别指示其对应的每个 PD2DSCH在子帧中频域上 所占用的起始 RB索引以及所占用的 RB个数。
20、 如权利要求 19所述的发送端, 其中: 所述发送模块是设置为以如下方式在发送所述 PD2DSCH 时, 由所述 D2DSS分别指示每个 PD2DSCH在子帧中频域上所占用的起始 RB索引以及 所占用的 RB个数: 所述 PD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 RB个数; 所述 SD2DSS的每种序列对应一个 PD2DSCH在子帧中频域上所占用的 起始 RB索引。
21、 如权利要求 20所述的发送端, 其中: 所述 SD2DSS的每种序列对应每个 PD2DSCH在子帧中频域上所占用的 起始 RB索引, 包括: 如果 N小于等于 D2DSS传输带宽所对应的 RB总数, 则所述 SD2DSS 的第 N种序列对应每个 PD2DSCH在子帧中频域上所占用的起始 RB索引; 如果 N大于 D2DSS传输带宽所对应的 RB总数,则利用 N对所述 RB总 数取模得到的 L, 所述 SD2DSS的第 L种序列对应 PD2DSCH在子帧中频域 上所占用的起始 RB索引, 所述 L为小于等于 D2DSS传输带宽所对应的 RB 总数的正整数。
22、 如权利要求 18或 19或 20或 21所述的发送端, 其中: 所述发送模块, 还设置为: 在发送所述 PD2DSCH时, 所述 PD2DSCH 可用单载波-频分多址 SC-FDMA符号开始的一个或连续多个可用 SC-FDMA 符号上发送, 其中, 所述 PD2DSCH所占的连续 4或 5或 6个可用 SC-FDMA 符号的个数由网络侧预先固定配置。
23、 如权利要求 18或 19或 20或 21所述的发送端, 还包括: 资源选择模块, 其设置为: 在无覆盖场景下, 对 D2DSS的可用资源进行 监听, 如果监听到空闲资源, 则选择一个空闲的资源通知发送模块发送所述 D2DSS和所述 PD2DSCH; 如果没有监听到可用资源, 则等待下一时刻重新 监听; 或者在覆盖 /部分覆盖场景下, 釆用网络侧调度的可用资源通知发送模 块在网络侧调度的可用资源上发送 D2DSS。
24、 一种设备到设备通信的接收端, 包括: 接收模块, 其设置为: 接收来自 D2D 发送端的设备到设备同步信号 D2DSS和物理设备到设备同步信道 PD2DSCH,其中,在接收所述 PD2DSCH 时, 在和所述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH; 或 者, 在由所述 D2DSS确定的频域位置上接收 PD2DSCH; 以及 处理模块, 其设置为: 对接收到的所述 PD2DSCH解调, 并根据所述 PD2DSCH中的信息完成对业务信道的接收。
25、 如权利要求 24所述的接收端, 其中: 所述 D2DSS 包括: D2D主同步信号 PD2DSS 和 /或 D2D辅同步信号 SD2DSS; 其中, PD2DSS和 SD2DSS均以序列的形式接收, PD2DSS的序列 种类为 M, M为小于等于 3的正整数; SD2DSS的序列种类为 N, N为大于 或等于 D2D传输带宽所对应的资源块 RB总数的正整数。
26、 如权利要求 25所述的接收端, 其中: 所述接收模块, 是设置为以如下方式在接收所述 PD2DSCH时, 在和所 述 D2DSS所在的频域位置相同的频域位置上接收 PD2DSCH: 在和所述 D2DSS 所占用的起始 RB 索引上接收 PD2DSCH, 且所述 PD2DSCH在频域所占用的 RB个数与所述 D2DSS所占用的 RB个数相同。
27、 如权利要求 25所述的接收端, 其中: 所述接收模块, 是设置为以如下方式在接收所述 PD2DSCH时, 在由所 述 D2DSS确定的频域位置上接收 PD2DSCH: 在所述起始 RB 索引和所述 RB 个数对应的频域位置上接收上述 PD2DSCH。
28、 如权利要求 26或 27所述的接收端, 其中: 所述接收模块, 还设置为: 在接收所述 PD2DSCH时, 在时域上从所述 PD2DSS或所述 SD2DSS所占时域符号之后或之前的第一个可用 SC-FDMA 符号开始的连续 4 或 5 或 6 个可用 SC-FDMA符号上接收并解调所述 PD2DSCH。
29、 如权利要求 28所述的接收端, 其中: 所述接收模块包括: 第一模块, 其设置为: 在所有 D2DSS可用资源上监听并接收 D2DSS, 完成和发送端之间的初步时间同步和频率同步; 第二模块, 其设置为: 在和所述 D2DSS所在的频域位置相同的频域位置 上接收 PD2DSCH; 或者在由所述 D2DSS确定的频域位置上接收 PD2DSCH。
30、 一种设备到设备通信同步信道的传输系统, 包括: 如权利要求 16~23 任一项所述的发送端和如权利要求 24~29任一项所述的接收端。
31、 一种计算机程序, 包括程序指令, 当该程序指令被设备到设备发送 端执行时, 使得该发送端可执行权利要求 1-9任一项所述的方法。
32、 一种计算机程序, 包括程序指令, 当该程序指令被设备到设备接收 端执行时, 使得该接收端可执行权利要求 10-15任一项所述的方法。
33、 一种载有权利要求 31或 32所述计算机程序的载体。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018023511A1 (en) * 2016-08-03 2018-02-08 Lenovo Innovations Limited (Hong Kong) Device-to-device transmission

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104796367B (zh) * 2014-01-16 2018-06-26 电信科学技术研究院 一种同步信息的发送方法、检测方法及用户设备
WO2017026518A1 (ja) * 2015-08-13 2017-02-16 株式会社Nttドコモ ユーザ装置及び信号同期方法
CN106559877B (zh) * 2015-09-24 2019-02-26 中兴通讯股份有限公司 车联网业务的发送方法及装置、资源配置方法及装置
CN107645742A (zh) * 2016-07-20 2018-01-30 普天信息技术有限公司 一种车与外界的信息交换v2x业务的传输方法
KR20180036565A (ko) * 2016-09-30 2018-04-09 주식회사 케이티 새로운 무선 접속 기술을 위한 동기 신호 설정 방법 및 장치
EP3739976B1 (en) * 2018-02-09 2022-08-03 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method and device for transmitting synchronization signals, and computer storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2587845A1 (en) * 2011-10-27 2013-05-01 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization between devices
CN103369585A (zh) * 2013-04-24 2013-10-23 华为技术有限公司 快速建立d2d通信的方法和装置
WO2013172678A1 (en) * 2012-05-16 2013-11-21 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization in device-to-device network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101998586B (zh) * 2009-08-17 2013-05-29 联芯科技有限公司 一种用于td-lte的plmn搜索方法和装置
CN103458462B (zh) * 2012-06-04 2019-02-05 电信科学技术研究院 一种小区选择方法和设备
CN102883411B (zh) * 2012-10-18 2014-11-05 合肥东芯通信股份有限公司 一种面向lte的频点扫描方法、处理器、装置和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2587845A1 (en) * 2011-10-27 2013-05-01 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization between devices
WO2013172678A1 (en) * 2012-05-16 2013-11-21 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization in device-to-device network
CN103369585A (zh) * 2013-04-24 2013-10-23 华为技术有限公司 快速建立d2d通信的方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LG ELECTRONICS.: "Discussion On Design Of D2DSS And PD2DSCH", 3GPP TSG RAN WG1 MEETING #75 RL-135479, 11 November 2013 (2013-11-11), pages 1 - 6, XP050735152 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018023511A1 (en) * 2016-08-03 2018-02-08 Lenovo Innovations Limited (Hong Kong) Device-to-device transmission
US10986609B2 (en) 2016-08-03 2021-04-20 Lenovo Innovations Limited (Hong Kong) Device-to-device transmission

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