WO2018024066A1 - 协作消息传输的方法及终端 - Google Patents

协作消息传输的方法及终端 Download PDF

Info

Publication number
WO2018024066A1
WO2018024066A1 PCT/CN2017/091647 CN2017091647W WO2018024066A1 WO 2018024066 A1 WO2018024066 A1 WO 2018024066A1 CN 2017091647 W CN2017091647 W CN 2017091647W WO 2018024066 A1 WO2018024066 A1 WO 2018024066A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
message
indication
cooperation
field
Prior art date
Application number
PCT/CN2017/091647
Other languages
English (en)
French (fr)
Inventor
苏宏家
庞继勇
朱俊
Original Assignee
华为技术有限公司
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2018024066A1 publication Critical patent/WO2018024066A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method and terminal for cooperative message transmission.
  • D2D communication based on cellular network
  • Proximity Service Proximity Service
  • terminal data can be transited without going through the network. Transfer directly between terminals.
  • terminal data is directly transmitted between terminals, which avoids terminal data transmission in the cellular communication through the network, thereby generating link gain.
  • resources for different D2Ds can be multiplexed, and resources of D2D communication and cellular communication can be multiplexed, thereby generating resource multiplexing gain.
  • the link gain and resource multiplexing gain can improve the efficiency of the wireless spectrum resources, thereby improving the overall network throughput.
  • the standardization work of D2D communication in the 3GPP LTE system has been started from the Release-12 version and has been enhanced in the Release-13 version.
  • the link between two terminals performing D2D communication may be referred to as a D2D link or an end-to-end link or a side link (Sidelink, SL).
  • the Air Interface between the two terminals can be called PC-5.
  • Working scenarios of D2D communication may include: In-Coverage (IC) and Out-of-Coverage (OoC).
  • any terminal may not be able to communicate with the outside world.
  • how to contact at least two terminals with the outside world is an urgent problem to be solved.
  • the embodiment of the present invention provides a method and a terminal for cooperative message transmission, where multiple terminals can send a cooperation message to the same destination address on the same time-frequency resource, so that the cooperation message can obtain power gain and expand the cooperation message. Coverage.
  • a method for collaborative message transmission including:
  • the first terminal sends an indication message to the second terminal, where the indication message includes indication information of a time-frequency resource, where the indication message is used to indicate that the second terminal sends a collaboration message to the third terminal on the time-frequency resource;
  • the first terminal together with the second terminal, sends the cooperation message to the third terminal on the time-frequency resource.
  • the first terminal sends the same information to the same destination on the same time-frequency resource together with the second terminal by using the indication of the first information sent by the first terminal, so that the second information can be obtained.
  • the gain that is to say, the coverage of the second information can be expanded in a phased manner, so that the third terminal, which is relatively far away, can receive the second information.
  • the collaboration message comprises a discovery message, a data message, or a synchronization message.
  • the first terminal may send the indication message to the second terminal on the first physical channel.
  • the first physical channel may be the first control channel, or the first physical channel may be the first shared channel.
  • the first control channel may be a PSCCH, and the first shared channel may be a PSSCH.
  • the indication message may be used to indicate that the second terminal is sent on the time-frequency resource on the second physical channel. Send a collaborative message.
  • the second physical channel may be a second control channel, and the cooperation message is a discovery message.
  • the second physical channel may be a second shared channel, and the cooperation message is a data message.
  • the second physical channel may be a physical synchronization channel, and the cooperation message is a synchronization message.
  • the second control channel may be a PSDCH, and the second shared channel may be a PSSCH.
  • the data message may include side link data (SL data), and the synchronization message may include a synchronization signal, such as SLSS.
  • the synchronization message may be periodically sent on a fixed proprietary time-frequency resource.
  • the indication message further includes a flag, where the identifier is specifically used to indicate that the second terminal sends the third terminal to the third terminal on the time-frequency resource. Collaboration news.
  • the indication message includes a media access control MAC service data unit (SDU), and a first field of the MAC SDU is used to indicate that the second terminal is The third terminal sends the cooperation message.
  • SDU media access control MAC service data unit
  • the indication message further includes a MAC header field, where the MAC header field includes a second field, where the second field is used to indicate whether the MAC SDU includes the first field.
  • the indication message is a MAC PDU
  • the MAC PDU includes a MAC header field and a MAC SDU.
  • the MAC SDU includes a first field
  • the MAC header field includes a second field.
  • the cooperation message includes special information, where the special information is used to indicate that the third terminal forwards the collaboration message to another device.
  • the third terminal can forward the cooperation message according to the special information in the cooperation message, thereby ensuring that the first terminal and the second terminal are indirectly discovered by other devices.
  • Other devices herein may include at least one of a network device and other terminals.
  • the indication message further includes address information of the third terminal.
  • the second terminal can conveniently obtain the address information of the destination of the cooperation message according to the indication message, and ensure that the cooperation message is smoothly transmitted to the same device.
  • a method for collaborative message transmission including:
  • the second terminal receives the indication message sent by the first terminal, where the indication message includes the indication information of the time-frequency resource, where the indication message is used to indicate that the second terminal sends the collaboration message to the third terminal on the time-frequency resource. ;
  • the second terminal sends the cooperation message to the third terminal on the time-frequency resource according to the indication message.
  • the second terminal sends the same information to the same destination on the same time-frequency resource together with the first terminal according to the indication of the first information sent by the first terminal, so that the second information can be obtained.
  • the gain that is to say, the coverage of the second information can be expanded in a phased manner, so that the third terminal, which is relatively far away, can receive the second information.
  • the collaboration message comprises a discovery message, a data message, or a synchronization message.
  • the indication message includes a media access control MAC service data unit (SDU), and a first field of the MAC SDU is used to indicate that the second terminal is The third terminal sends the cooperation message.
  • SDU media access control MAC service data unit
  • the indication message further includes a MAC header field, where the MAC header field includes a second field, and the second A field is used to indicate whether the MAC SDU includes the first field.
  • the cooperation message includes special information, where the special information is used to indicate that the third terminal forwards the collaboration message to another device.
  • the indication message further includes address information of the third terminal.
  • a terminal including: a first sending unit and a second sending unit, the terminal being capable of implementing the method for cooperative message transmission described in the foregoing first aspect and various implementation manners thereof.
  • a terminal including: a processor, a transceiver, and a memory.
  • the memory is for storing code
  • the processor is configured to execute code in the memory, and when the code is executed, the processor may implement the cooperative information described in the foregoing first aspect and various implementation manners by using a transceiver The method of transmission.
  • a computer readable storage medium storing a program causing a terminal to perform any of the above first aspect and various implementations thereof for a cooperative message The method of transmission.
  • Figure 1 is a schematic diagram of a D2D transmission scenario.
  • FIG. 2 is a schematic diagram of a scenario for cooperative message transmission according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a method for cooperative message transmission in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an indication message and a cooperation message according to an embodiment of the present application.
  • FIG. 5 is another schematic diagram of an indication message and a collaboration message according to an embodiment of the present application.
  • FIG. 6 is another schematic diagram of an indication message and a collaboration message according to an embodiment of the present application.
  • FIG. 7 is another schematic diagram of an indication message and a collaboration message according to an embodiment of the present application.
  • FIG. 8 is another schematic diagram of an indication message and a collaboration message according to an embodiment of the present application.
  • FIG. 9 is another schematic diagram of an indication message and a collaboration message according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a MAC PDU carrying an indication message according to an embodiment of the present application.
  • FIG. 11 is another schematic flowchart of a method for cooperative message transmission according to an embodiment of the present application.
  • FIG. 12 is another schematic flowchart of a method for cooperative message transmission according to an embodiment of the present application.
  • FIG. 13 is a structural block diagram of a terminal according to an embodiment of the present application.
  • FIG. 14 is another structural block diagram of a terminal according to an embodiment of the present application.
  • FIG. 15 is another structural block diagram of a terminal according to an embodiment of the present application.
  • FIG. 16 is another structural block diagram of a terminal according to an embodiment of the present application.
  • a terminal may be referred to as a user equipment (User Equipment, UE), an access terminal, a terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a mobile device.
  • user terminal wireless communication device, user agent or user device.
  • the terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless communication function.
  • NR New Radio
  • D2D communication is a direct communication technology. Data interaction between terminals does not need to be forwarded through the base station. Terminals can interact directly or directly under the aid of the network.
  • the resource for performing D2D information transmission and reception is defined as a D2D Resource Pool.
  • the resource pool used to send information is called a sending resource pool, and the resource pool used to receive information is a receiving resource pool.
  • the D2D resource pool is composed of a series of Resource Blocks (RBs) in the frequency domain, and is composed of a series of symbols (Symbols) in the time domain.
  • RBs Resource Blocks
  • Symbols symbols
  • the working scenarios of D2D communication may include: IC and OoC.
  • terminal 20 and terminal 30 are within service area 60 of base station 10, and terminal 40 and terminal 50 are outside service area 60 of base station 10.
  • the D2D communication between the terminal 20 and the terminal 30 belongs to the working scenario of the IC; the D2D communication between the terminal 40 and the terminal 50 belongs to the working scenario of the OoC.
  • the resource pool cannot be allocated/configured by the network, and the terminal 40 and the terminal 50 must send and receive information according to their pre-configured resource pool.
  • the terminal 40 searches for a Sidelink Synchronization Signal (SLSS) and a Master Information Block-Sidelink (MIB-SL) in a predefined Resource Pool. ). If the SLSS or MIB-SL is not received within a certain time, the terminal 40 will actively send the SLSS and/or MIB-SL in a predefined transmission resource pool and randomly select a value within a predefined range of values. Identify yourself as the SLSS identifier (Identity, ID).
  • SLSS Sidelink Synchronization Signal
  • MIB-SL Master Information Block-Sidelink
  • the terminal 50 can communicate with the terminal 40 that transmits the SLSS and/or the MIB-SL. Synchronization is performed for the SyncRef terminal, and the terminal 50 can configure the same SLSS ID as the terminal 40 to identify itself.
  • the terminal 50 may also transmit the SLSS and/or the MIB-SL in accordance with the contents of the synchronization signal and/or system information included in the terminal 40. In this way, other terminals can synchronize with the synchronized terminal (i.e., terminal 50) to indirectly synchronize with terminal 40.
  • D2D communication can be roughly divided into two stages of D2D discovery and D2D transmission.
  • the D2D discovery means that the terminal sends a discovery announcement, and the other terminal obtains the information of the terminal that sends the discovery message by reading the discovery message.
  • the discovery message may include identity information of the terminal that sent the discovery message, such as identity.
  • D2D transmission refers to the terminal sending control information and data. The other terminal obtains information such as the transmission format of the subsequent data by reading the control information, thereby correctly receiving subsequent data.
  • the terminal 40 sends a discovery message on a Physical Sidelink Discovery Channel (PSDCH) in a predefined transmission resource pool (Discovery announcement). ).
  • the terminal 50 also searches for a discovery message on the PSDCH in the predefined receiving resource pool.
  • the terminal 50 that correctly receives the discovery message can discover the sender (ie, the terminal 40 that sent the discovery message), thereby completing the discovery process.
  • the terminal is not associated with any network device (such as a base station, an eNB), and thus it is impossible to obtain a configuration resource pool allocated by the network.
  • the terminal must send and receive information according to its pre-configured resource pool to implement communication.
  • the terminal 40 sends Side Link Control Information (SCI) format 0 (Format 0) on a physical side link control channel (PSCCH) in a predefined transmission resource pool. Signaling.
  • SCI Side Link Control Information
  • PSCCH physical side link control channel
  • PSSCH Physical Sidelink Shared Channel
  • the terminal 40 can implement communication with the terminal 50 by transmitting signaling or data to the terminal 50 using resources in the transmission resource pool of the prior theorem.
  • the SCI format 0 is used to schedule the PSSCH, that is, the terminal 50 needs to decode the PSSCH sent by the terminal 40 according to the information in the correctly received SCI format 0, thereby obtaining the information in the data packet.
  • the information contained in SCI format 0 can be as shown in Table 1 below:
  • the terminal 11 and the two terminals 12 shown in FIG. 2 can perform synchronization with each other and perform D2D communication in accordance with the above method.
  • the three terminals are in the OoC state, no one can communicate with the outside world.
  • the terminal 11 and the two terminals 12 are in an emergency rescue, and are in an OoC state for some reason (for example, a network port). Therefore, it is necessary to consider how to make the three terminals communicate with each other (connected to the network).
  • FIG. 3 is a schematic flowchart of a method for cooperative message transmission according to an embodiment of the present application. It should be noted that although the transmitting end of the cooperative message in FIG. 3 shows two terminals: the terminal 11 and the terminal 12, the number of terminals may actually be three or more, or it may be understood that the terminal 12 represents at least one Terminal, this application is not limited thereto.
  • the method shown in Figure 3 includes:
  • the terminal 11 sends an indication message to the terminal 12.
  • the terminal 11 sends the cooperation message together with the terminal 12 on the same time-frequency resource.
  • the terminal 11 may be referred to as a transmitting end of the indication message
  • the terminal 12 may be referred to as a receiving end of the indication message
  • the number of receiving ends indicating the message may be one or more.
  • the terminal 11 sends an indication message through the SL, where the indication message may include a time-frequency resource.
  • the indication information is used to indicate that the receiving end (such as the terminal 12) sends the cooperation message on the time-frequency resource.
  • the collaboration message may be a discovery message, a data message, or a synchronization message.
  • the data message may be a message containing control information and/or data information sent on the PSSCH.
  • the synchronization message may include a synchronization signal, such as SLSS.
  • the terminal 11 sends an indication message to initiate coordinated transmission with the terminal 12, which may be referred to as a primary coordination party, or a primary cooperation terminal (Master Cooperation terminal, MC-terminal).
  • a primary coordination party or a primary cooperation terminal (Master Cooperation terminal, MC-terminal).
  • MC-terminal Master Cooperation terminal
  • the terminal 11 and the terminal 12 may further perform D2D synchronization.
  • the MC-terminal may be determined during the synchronization process of the D2D. Specifically, if the terminal 11 cannot detect the SLSS for a period of time, the terminal 11 selects to actively send the SLSS and the MIB-SL for other terminals to synchronize with itself, and then the terminal. 12 detects the synchronization signal of the terminal 11 and synchronizes with the terminal 11, and at this time, the terminal 11 can initiate EU cooperation as the MC-terminal.
  • the selection of the MC-terminal can also be determined through the signaling interaction between the terminal 11 and the terminal 12. For example, the terminal 11 actively initiates D2D communication, and requests to become an MC-terminal. The terminal 11 is determined through the interaction between the terminal 11 and the terminal 12. For the MC-terminal.
  • the terminal 11 may send the indication message on the first physical channel.
  • the first physical channel is a control channel.
  • the first physical channel is a physical side link control channel (PSCCH).
  • the indication message may be a newly defined L1 layer control signaling, such as the SCI format in LTE, ie, SCI format 1.
  • SCI format 1 The content contained in the SCI format 1 can be as shown in Table 2 below:
  • the terminal 11 may transmit the SCI format 1 by selecting a time-frequency resource (ie, a transmission resource) for the PSCCH in a predefined transmission resource pool through an end-to-end interface (for example, PC-5 in LTE).
  • a time-frequency resource ie, a transmission resource
  • an end-to-end interface for example, PC-5 in LTE
  • the “resource block allocation and frequency hopping resource allocation” and the “time resource mode” are indication information of time-frequency resources. That is, the indication message in the embodiment of the present application includes indication information of a time-frequency resource.
  • the sending end of the indication message is the terminal 11
  • the receiving end of the indication message is the terminal 12
  • the indication message is the SCI format 1 sent on the PSCCH.
  • FIG. 5 shows that in S104, the transmitting end of the cooperation message is the terminal 11 and the terminal 12, the receiving end of the cooperation message is the terminal 13, and the terminal 11 and the terminal 12 send the cooperation message on the same time-frequency resource.
  • the indication message includes indication information of the time-frequency resource.
  • the indication message in the embodiment of the present application may further include a flag.
  • the identifier is a first identifier, a second identifier, or a third identifier, where the first identifier is used to indicate that the terminal 12 sends a discovery message on the time-frequency resource, and the second identifier is used to indicate that the terminal 12 is in the location
  • the data message is sent on the time-frequency resource; the third indicator is used to instruct the terminal 12 to send the synchronization message on the time-frequency resource.
  • the first indication is used to indicate that the terminal 12 sends a discovery message on the physical side link discovery channel (PSDCH) on the time-frequency resource;
  • the second indication is used to indicate that the terminal 12 is in the time On the frequency resource, the data message is sent on the physical side link shared channel (PSSCH);
  • the third indicator is used to instruct the terminal 12 to send the synchronization on the time-frequency resource dedicated to transmitting the synchronization signal (SS).
  • the message for example, can send a synchronization message on a physical synchronization channel.
  • the length of the indication in the embodiment of the present application may be 2 bits.
  • “01” indicates the first indication
  • “10” indicates the second indication
  • “11” indicates the third indication
  • “00” represents the first indication
  • “01” represents the second indication
  • “10” represents the third indication.
  • Etc., this application does not limit this.
  • the length of the indication in the embodiment of the present application may also be 1 bit.
  • the first value and the second value of the bit are utilized to indicate the transmission of the discovery message and the transmission of the data message, respectively. For example, "0" indicates the first indication and "1" indicates the second indication.
  • the first indication is used to indicate that the terminal 12 sends a discovery message on the time-frequency resource
  • the second indication is used to instruct the terminal 12 to send a data message on the time-frequency resource.
  • the indication message is used to instruct the terminal 12 to send a cooperation message on the time-frequency resource.
  • the indication message is used to indicate that the cooperation message is sent on the second physical channel, where the time-frequency resource occupied by the second physical channel is the time-frequency resource.
  • the second physical channel is a discovery channel, such as a PSDCH
  • the cooperation message is a discovery message.
  • the second physical channel is a shared channel, such as a PSSCH, and the cooperation message is a data message.
  • the indication in the indication message is the third indication, the second physical channel is a physical synchronization channel (ie, a time-frequency resource dedicated to transmitting the synchronization signal), and the cooperation message is a synchronization message.
  • the first indication may be format 1A (which may be considered as a subclass of SCI Format 1)
  • the second indication may be format 1B (which may be considered as a subclass of SCI Format 1)
  • the third indication may be format 1C ( Can be considered a subclass of SCI Format 1). That is, the indication may be format 1A or format 1B or format 1C.
  • SCI format 1 may be considered to include three sub-formats, namely SCI format 1A, SCI format 1B, and SCI format 1C.
  • the label in Table 2 is format 1A, it is sub-format SCI format 1A; if the label in Table 2 is format 1B, it is sub-format SCI format 1B; if the label in Table 2 is format 1C, then For subformat SCI format 1C.
  • the format 1A can be used to instruct the terminal 12 to send a discovery message.
  • Format 1B can be used to instruct terminal 12 to send a data message.
  • Format 1C can be used to instruct terminal 12 to send a synchronization message.
  • the terminal 12 it can be determined according to the length of the received message whether the received SCI format 0 or SCI format 1. If it is determined to be SCI format 1, the sub-format can be further determined to be SCI format 1A or SCI format 1B or SCI format 1C according to the content of the flag, so that the terminal 12 can determine that the cooperation message to be sent is a discovery message or a data message or synchronization. Message.
  • the terminal 12 can distinguish between the SCI format 0 and the SCI format 1 by referring to the method for distinguishing different Downlink Control Information (DCI) Format, and details are not described herein again.
  • DCI Downlink Control Information
  • the terminal 11 and the terminal 12 can transmit control information to the terminal 13 before transmitting the data message.
  • FIG. 6 shows that in S102, the transmitting end of the indication message is the terminal 11, the receiving end of the indication message is the terminal 12, and the indication message is the SCI format 1B transmitted on the PSCCH.
  • FIG. 7 shows that in S104, the transmitting end of the cooperation message is the terminal 11 and the terminal 12, and the receiving end of the cooperation message is the terminal 13.
  • the terminal 11 and the terminal 12 transmit control information to the terminal 13 on the same time-frequency resource, and then transmit the data message on another identical time-frequency resource.
  • the content of the data message sent by the terminal 11 and the terminal 12 is the same or the same.
  • the data messages sent by the terminal 11 and the terminal 12 are both used to instruct the terminal 13 to forward the cooperation message to other devices.
  • the terminal 11 and the terminal 12 may be on the same time-frequency resource (for example, transmitting control information on the PSCCH), and the control information is SCI format 0.
  • the indication information of the time-frequency resource for transmitting the control information is included in the indication message of S102.
  • the terminal 13 decodes the terminal 11 and the terminal 12 on the same other time-frequency resource (for example, data transmitted in the PSSCH) according to the information in the correctly received SCI format 0, and the data is side link data (Sidelink Data). , SL Data).
  • the time-frequency resource (ie, the same other time-frequency resource) for transmitting data may be indicated by a control message (ie, SCI format 0).
  • the terminal 11 may carry the indication message through a data packet of the L2 layer, that is, through a special Media Access Control (MAC) Protocol Data Unit (PDU).
  • MAC Media Access Control
  • PDU Protocol Data Unit
  • the special feature of the MAC PDU here is that it does not carry traditional data information, but carries control information. Also, it does not need to carry a sub-header compared to a conventional PSSCH MAC PDU. That is, the content of the SCI format 1 shown in Table 2 above may be carried in a data message corresponding to the PSCCH.
  • the method further includes: the terminal 11 transmitting control information on the control channel.
  • the control channel here is PSCCH, and the control information is SCI format 0.
  • the terminal 11 transmits a MAC PDU on the shared channel.
  • the terminal 11 can transmit the indication message on the first physical channel.
  • the first physical channel is a shared channel, for example, a PSSCH.
  • the indication message is carried in the MAC PDU.
  • the terminal 11 may configure the control signaling SCI format 0 of the PSCCH in advance, and send the MAC PDU by using the time-frequency resource indicated by the SCI format 0.
  • the terminal 12 receives the SCI format 0, and decodes the data packet transmitted by the terminal 11, that is, the MAC PDU on the PSSCH, in the specified manner on the time-frequency resource indicated by the SCI format 0.
  • FIG. 8 shows that in S102, the transmitting end is the terminal 11, and the receiving end is the terminal 12.
  • the terminal 11 transmits a control message on the PSCCH, the control message is SCI format 0, and then the terminal 11 transmits a MAC PDU on the PSSCH.
  • the indication information is carried in the MAC PDU.
  • FIG. 9 shows that in S104, the transmitting end of the cooperation message is the terminal 11 and the terminal 12, and the receiving end of the cooperation message is the terminal 13. And the terminal 11 and the terminal 12 are in phase A collaborative message is sent on the same time-frequency resource. It can be understood that, if the terminal 11 and the terminal 12 in FIG. 9 transmit data, reference may be made to the process shown in FIG. 7, and details are not described herein again.
  • the MAC PDU may include a MAC header field and a MAC Service Data Unit (SDU), as shown in FIG. 10.
  • the indication message is a MAC PDU.
  • the indication message is a MAC SDU
  • the MAC SDU is included in the MAC PDU
  • the MAC PDU further includes a MAC header field.
  • the MAC SDU includes a first field
  • the MAC header field includes a second field.
  • the second field is used to indicate that the MAC SDU includes a first field, where the first field is used to instruct the terminal 12 to send a collaboration message.
  • the first field may be a flag
  • the second field may be a cooperation flag (CF), as described below.
  • the MAC header field in the embodiment of the present application may be a MAC sub-header domain dedicated to D2D communication, and the MAC sub-header field includes a “Cooperation Flag (CF)”.
  • CF Cooperation Flag
  • the MAC PDU in which the MAC sub-header field is located is a Cooperative MAC PDU.
  • the corresponding MAC SDU is a Cooperative MAC SDU (Cooperation MAC SDU).
  • the cooperative MAC SDU includes a Flag field.
  • the MAC SDU refers to a MAC PDU including a cooperative MAC SDU, where the cooperative MAC SDU includes the format and content of the SCI format 1 described above.
  • the MAC header field in the embodiment of the present application includes a SL-SCH sub-header field, and no longer includes an R/E/E/L/LCID/L sub-header field.
  • the MAC header field must include an R/E/E/L/LCID/L sub-header field corresponding to the MAC SDU in addition to the SL-SCH sub-header field.
  • the MAC PDU in the embodiment of the present application is not a conventional data packet, and the format of the MAC SDU is fixed (that is, the format of the SCI format 1), so there is no need to include the R/E/E/L/LCID. /L subheader field.
  • the MAC header field includes a Version (V) field, a CF field, a Source Address (SRC) field, and a Destination Address (DST) field, and may further include one or more reservations (R). Fields, three R fields are shown in FIG.
  • the V field is used to indicate the version of the MAC PDU format.
  • the R field is reserved and the default setting can be 0.
  • the SRC field is the layer 2 source identifier (Source Layer-2ID) used to identify the source.
  • the DST field is a layer 2 target identifier (Destination Layer-2ID) used to identify the target.
  • the MAC SDU includes a flag, a frequency hopping flag, a resource block assignment and a hopping resource allocation, and a time resource pattern. ), Modulation and Coding Scheme (MCS), Timing advance indication, and Group destination ID.
  • MCS Modulation and Coding Scheme
  • the CF field in the MAC header field can be used to indicate whether the MAC SDU includes a Flag field. For example, as an example, a value of 1 in the CF field indicates that the MAC SDU includes a Flag field; a value of 0 in the CF field indicates that the MAC SDU does not include a Flag field. Or, as another example, a value of 0 in the CF field indicates that the MAC SDU includes a Flag field; a value of 1 in the CF field indicates that the MAC SDU does not include a Flag field.
  • the terminal 12 it can be determined according to the CF field in the MAC header field whether the corresponding MAC SDU includes a Flag field.
  • the indication field in the embodiment of the present application may include a first indication or a second indication or a third indication.
  • Phase For the description of the indication refer to the related description of the above embodiment. To avoid repetition, details are not described herein again.
  • the reserved field (or part of the reserved field) in the MAC header field is used to indicate the type of the collaborative message (eg, indicating that the collaborative message is a discovery message).
  • the (Flag) field in the MAC SDU there is no need to separately define the CF field in the MAC header field.
  • the indication message may further include destination address information of the cooperation message, such as address information of the terminal 13.
  • the terminal 12 can directly determine the destination address of the cooperation message to be sent according to the destination address information included in the indication message.
  • the terminal 11 and the terminal 12 use the same MCS to transmit the same cooperation message to the same target address (such as the terminal 13) on the same time-frequency resource.
  • the same target address may be a broadcast address or a pre-set special address.
  • the terminal 11 and the terminal 12 can use the broadcast address or a preset special address as the target address.
  • the preset special address may refer to an address dedicated to receiving the cooperation message, for example, may be preset in the standard. Accordingly, the terminal 13 can receive the cooperation message according to the broadcast address or a preset special address.
  • a cooperation destination ID may be set, where the cooperation target identifier is a broadcast address or a preset special address.
  • a cooperation source ID corresponding to the cooperation target identifier may also be set. In this way, it is possible to facilitate the transmission and reception of information between the transmitting end and the receiving end of the cooperative message.
  • the terminal 11 and the terminal 12 can use the address of the terminal 13 as the target address.
  • the terminal 13 has caused the terminal 11 and/or the terminal 12 to know the address information of the terminal 13 by some means.
  • the terminal 13 can cause the terminal 11 and/or the terminal 12 to receive the cooperation message of the terminal 13 using the method of cooperative message transmission of the embodiment of the present application.
  • the indication message may include the address information of the terminal 13. If the indication message includes the address information of the terminal 13, the terminal 11 transmits the cooperation message to the terminal 13 together with the terminal 12 in S104. If the terminal 12 already knows the existence of the terminal 13, the terminal 11 can notify the terminal 11 of the address information of the terminal 13 in the previous D2D transmission of the terminal 11 and the terminal 12.
  • the cooperation message will get power gain, that is to say, the coverage of the cooperation message can be expanded, so that the terminal 13 which is relatively far away can receive the cooperation message.
  • the cooperation message in the embodiment of the present application may include special information, where the special information is used to instruct the terminal 13 to forward the cooperation message to other devices.
  • the terminal 13 can forward the cooperation message to the network device (e.g., base station) of the cell in which it is located.
  • the terminal 13 can forward the cooperation message to other relay terminals or D2D terminals or the like that can communicate with the terminal 13.
  • the above embodiment of the present application assumes that the terminal 11 and the terminal 12 are in an OoC scenario
  • the above method of the present application can also be applied to the scenario of the IC. That is, if the terminal 11 and the terminal 12 are within the network coverage, the power gain can also be achieved by the method of cooperative message transmission described above.
  • the terminal 11 in FIG. 3 can be replaced with the terminal 20, and the terminal 12 can be replaced with The terminal 30 and the like are not limited in this application.
  • FIG. 11 is another schematic flowchart of a method for cooperative message transmission according to an embodiment of the present application.
  • the method is performed by the first terminal, where the first terminal may be the terminal 11 in the foregoing embodiment, and the method includes:
  • the first terminal sends the first information to the second terminal, where the first information is used to instruct the second terminal to send the second information.
  • the first terminal together with the second terminal, sends the second information to the third terminal on the same time-frequency resource.
  • the first terminal sends the same information to the same destination on the same time-frequency resource together with the second terminal by using the indication of the first information sent by the first terminal, so that the second information can be obtained.
  • the gain that is to say, the coverage of the second information can be expanded in a phased manner, so that the third terminal, which is relatively far away, can receive the second information.
  • the first information may be sent by the first terminal on the SL between the first terminal and the second terminal.
  • the first information may be carried on a first physical channel, where the first physical channel may be a control channel or a shared channel.
  • the control channel is PSCCH and the shared channel is PSSCH.
  • the second information may be a discovery message or a data message (eg, including SL data) or a synchronization message (eg, including SLSS).
  • the second information may be carried on the second physical channel.
  • the second physical channel is a control channel (such as PSDCH); if the second information is a data message (such as SL Data), the second physical channel is a shared channel (such as PSSCH);
  • the information is a synchronization message (such as SLSS), and the second physical channel is a time-frequency resource channel (which can be understood as a physical synchronization channel) dedicated to transmitting a synchronization signal.
  • the time-frequency resource in S202 may be pre-agreed, and may be indicated by the first terminal in the signaling or information before S201, which may be indicated by the first information in S201, and the application does not limited.
  • the first information is an indication message
  • the second information is a collaboration message
  • the indication message includes indication information of a time-frequency resource, where the indication message is used to indicate that the second terminal sends a collaboration message to the third terminal on the time-frequency resource.
  • S201 reference may be made to S102 in the foregoing embodiment of FIG. 3, and S202 may be referred to the foregoing S104 in the embodiment of FIG. 3. To avoid repetition, details are not described herein again.
  • FIG. 12 is another schematic flowchart of a method for cooperative message transmission according to an embodiment of the present application.
  • the method shown in FIG. 12 is performed by the second terminal, where the second terminal may be the terminal 12 in the foregoing embodiment, and the method includes:
  • the second terminal receives the first information sent by the first terminal, where the first information is used to instruct the second terminal to send the second information.
  • the second terminal sends the second information to the third terminal on the same time-frequency resource together with the first terminal according to the first information.
  • the second terminal sends the same information to the same destination on the same time-frequency resource together with the first terminal according to the indication of the first information sent by the first terminal, so that the second information can be obtained.
  • the gain that is to say, the coverage of the second information can be expanded in a phased manner, so that the third terminal, which is relatively far away, can receive the second information.
  • the first information may be carried on a first physical channel, where the first physical channel may be a control channel or a shared channel.
  • the control channel is PSCCH and the shared channel is PSSCH.
  • the second information may be a discovery message or a data message (eg, including SL data) or a synchronization message (eg, including SLSS).
  • the second information may be carried on the second physical channel.
  • the second physical channel is a control channel (such as PSDCH); if the second information is a data message, the second physical channel is a shared channel (such as PSSCH); if the second information is a synchronization message,
  • the second physical channel is a time-frequency resource channel (which can be understood as a physical synchronization channel) dedicated to transmitting a synchronization signal.
  • the time-frequency resource in S302 may be pre-agreed, and may be indicated by the first terminal in the signaling or information before S301, and may be indicated by the first information in S301. limited.
  • the first information is an indication message
  • the second information is a collaboration message
  • the indication message includes indication information of a time-frequency resource, where the indication message is used to indicate that the second terminal sends a collaboration message to the third terminal on the time-frequency resource.
  • FIG. 13 is a structural block diagram of a terminal according to an embodiment of the present application.
  • the terminal 100 shown in FIG. 13 includes a first transmitting unit 401 and a second transmitting unit 402.
  • the first sending unit 401 is configured to send, to the second terminal, first information, where the first information is used to instruct the second terminal to send the second information.
  • the second sending unit 402 is configured to send, by the second terminal, the second information to the third terminal on the same time-frequency resource.
  • the first information may be an indication message
  • the second information may be a collaboration message
  • the first sending unit 401 is configured to send an indication message to the second terminal, where the indication message includes indication information of a time-frequency resource, where the indication message is used to indicate that the second terminal is on the time-frequency resource.
  • the third terminal sends a cooperation message; the second sending unit 402 is configured to send the cooperation message to the third terminal on the time-frequency resource together with the second terminal.
  • the first sending unit 402 is specifically configured to send, by using the SL between the terminal 100 and the second terminal, an indication message to the second terminal on the first physical channel.
  • the first physical channel is a control channel, such as a PSCCH.
  • the first physical channel is a shared channel, such as a PSSCH.
  • the first sending unit 401 is further configured to send control information to the second terminal on the PSCCH, where the control information is used to indicate a time-frequency resource of the indication message, and the like.
  • the second sending unit 402 is specifically configured to send the cooperation message to the third terminal by using the same time-frequency resource with the second terminal on the second physical channel.
  • the second physical channel is a control channel, such as PSDCH, and accordingly, the cooperation message is a discovery message.
  • the second physical channel is a shared channel, such as a PSSCH, and accordingly, the cooperation message is a data message.
  • the second physical channel is a time-frequency resource channel (which can be understood as a physical synchronization channel) dedicated to transmitting a synchronization signal, and accordingly, the cooperation message is a synchronization message.
  • the first sending unit 401 and the second sending unit 402 in FIG. 13 can be implemented by a transceiver.
  • the terminal 100 includes a processor 410, a transceiver 420, and a memory 430.
  • the memory 430 is used to store instructions executed by the processor 410.
  • the processor 410 is specifically configured to send an indication message to the second terminal by using the transceiver 420, and send the cooperation message to the third terminal on the same time-frequency resource together with the second terminal.
  • bus system 440 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the terminal 100 shown in FIG. 13 or the terminal 100 shown in FIG. 14 can implement the various processes performed by the terminal 11 in the foregoing method embodiments of FIG. 3 to FIG. 12, and the details are not described herein again.
  • FIG. 15 is a structural block diagram of a terminal according to an embodiment of the present application.
  • the terminal 200 shown in FIG. 15 includes a receiving unit 501 and a transmitting unit 502.
  • the receiving unit 501 is configured to receive first information sent by the first terminal, where the first information is used to indicate that the second terminal sends Send the second message.
  • the sending unit 502 is configured to send, according to the first information received by the receiving unit 501, the second information to the third terminal on the same time-frequency resource together with the first terminal.
  • the first information may be an indication message
  • the second information may be a collaboration message
  • the receiving unit 501 is configured to receive an indication message sent by the first terminal, where the indication message includes indication information of a time-frequency resource, where the indication message is used to indicate that the second terminal is in the time-frequency resource
  • the third terminal sends a cooperation message
  • the sending unit 502 is configured to send the cooperation message to the third terminal according to the indication message received by the receiving unit 501 on the time-frequency resource.
  • the receiving unit 501 is specifically configured to receive, by using the SL between the terminal 200 and the first terminal, an indication message sent by the first terminal, on the first physical channel.
  • the first physical channel is a control channel, such as a PSCCH.
  • the first physical channel is a shared channel, such as a PSSCH.
  • the first sending unit 401 is further configured to send control information to the second terminal on the PSCCH, where the control information is used to indicate a time-frequency resource of the indication message, and the like.
  • the sending unit 502 is specifically configured to send the cooperation message to the third terminal by using the same time-frequency resource with the first terminal on the second physical channel.
  • the second physical channel is a control channel, such as PSDCH, and accordingly, the cooperation message is a discovery message.
  • the second physical channel is a shared channel, such as a PSSCH, and accordingly, the cooperation message is a data message.
  • the second physical channel is a time-frequency resource channel (which can be understood as a physical synchronization channel) dedicated to transmitting a synchronization signal, and accordingly, the cooperation message is a synchronization message.
  • the receiving unit 501 in FIG. 15 can be implemented by a receiver, and the transmitting unit 502 can be implemented by a transmitter.
  • the terminal 200 includes a processor 510, a receiver 520, a transmitter 503, and a memory 540.
  • the memory 540 is used to store instructions executed by the processor 510.
  • the processor 510 is specifically configured to receive the indication message sent by the first terminal by using the receiver 520, and send the cooperation message to the third terminal on the same time-frequency resource together with the first terminal by using the transmitter 520.
  • a bus system 550 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the terminal 200 shown in FIG. 15 or the terminal 200 shown in FIG. 16 can implement the various processes performed by the terminal 12 in the foregoing method embodiments of FIG. 3 to FIG. 12, and details are not described herein again to avoid repetition.
  • the computer program product can include one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic disk), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请实施例提供了一种协作消息传输的方法，包括：第一终端向第二终端发送指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；所述第一终端，与所述第二终端一起，在所述时频资源上向所述第三终端发送所述协作消息。这样，第一终端与第二终端在相同的时频资源上向相同的目的地发送协作消息，能够使得协作消息得到功率增益，扩大该协作消息的覆盖范围，从而能够使得原本处于较远处的第三终端能够收到该协作消息。

Description

协作消息传输的方法及终端 技术领域
本申请实施例涉及通信领域，并且更具体地，涉及一种协作消息传输的方法及终端。
背景技术
基于蜂窝网络的设备到设备(Device-to-Deceive，D2D)通信，也可以称为端到端(End to End)通信或邻近服务(Proximity Service，ProSe)，是指终端数据可不经过网络中转而直接在终端之间进行传输。在D2D通信模式下，终端数据直接在终端之间传输，避免了蜂窝通信中终端数据经过网络中转传输，由此产生链路增益。另外，用于不同D2D的资源可以复用，以及D2D通信与蜂窝通信的资源可以复用，由此可产生资源复用增益。通过链路增益和资源复用增益则可提高无线频谱资源的效率，进而提高整体网络的吞吐量。D2D通信在3GPP LTE系统中的标准化工作已经从Release-12版本开始，并在Release-13版本得以加强。
进行D2D通信的两个终端之间的链路可以称为D2D链路或端到端链路或边链路(Sidelink，SL)。两个终端之间的空口(Air Interface)可以称为PC-5。D2D通信的工作场景可以包括：有网络覆盖(In-Coverage，IC)和无网络覆盖(Out-of-Coverage，OoC)。
处于OoC场景的至少两个终端之间进行D2D通信时，可能任何一个终端都无法与外界进行通信交互，此时，至少两个终端如何与外界获得联系是一个亟需解决的问题。
发明内容
本申请实施例提供一种协作消息传输的方法及终端，多个终端可以在相同的时频资源上向相同的目的地址发送协作消息，从而该协作消息能够的得到功率增益，扩大该协作消息的覆盖范围。
第一方面，提供了一种协作消息传输的方法，包括：
第一终端向第二终端发送指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
所述第一终端，与所述第二终端一起，在所述时频资源上向所述第三终端发送所述协作消息。
本申请实施例中，通过第一终端发送的第一信息的指示，第一终端与第二终端一起在相同的时频资源上向相同的目的地发送相同的信息，能够使得第二信息得到功率增益，也就是说可以变相地扩大该第二信息的覆盖范围，使得距离相对较远的第三终端能够接收到该第二信息。
结合第一方面，在第一方面的某些可能的实现方式中，所述协作消息包括发现消息、数据消息或同步消息。
结合第一方面，在第一方面的某些可能的实现方式中，第一终端可以在第一物理信道上向第二终端发送指示消息。可选地，该第一物理信道可以为第一控制信道，或者，该第一物理信道可以为第一共享信道。其中，第一控制信道可以为PSCCH，第一共享信道可以为PSSCH。
可选地，指示消息可以用于指示第二终端在第二物理信道上，在所述时频资源上发 送协作消息。
可选地，第二物理信道可以为第二控制信道，相应地协作消息为发现消息。可选地，第二物理信道可以为第二共享信道，相应地协作消息为数据消息。可选地，第二物理信道可以为物理同步信道，相应地协作消息为同步消息。其中，第二控制信道可以为PSDCH，第二共享信道可以为PSSCH。其中，数据消息可以包括边链路数据(SL data)，同步消息可以包括同步信号，例如SLSS。其中，同步消息可以在固定的专有的时频资源上周期性地发送。
结合第一方面，在第一方面的某些可能的实现方式中，所述指示消息还包括标示(Flag)，该标示具体用于指示第二终端在所述时频资源上向第三终端发送协作消息。
结合第一方面，在第一方面的某些可能的实现方式中，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
可选地，指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二字段用于指示所述MAC SDU是否包括所述第一字段。
可以理解为，指示消息为MAC PDU，该MAC PDU包括MAC头域和MAC SDU。MAC SDU包括第一字段，且MAC头域包括第二字段。
结合第一方面，在第一方面的某些可能的实现方式中，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
这样，第三终端可以根据协作消息中的特殊信息将该协作消息进行转发，从而保证第一终端和第二终端间接地被其他设备发现。这里的其他设备可以包括网络设备、其他终端中的至少一个。
结合第一方面，在第一方面的某些可能的实现方式中，所述指示消息还包括所述第三终端的地址信息。
这样，第二终端可以直接地根据指示消息方便地获取协作消息的目的地的地址信息，保证协作消息顺利地向同一个设备传输。
第二方面，提供了一种协作消息传输的方法，包括：
第二终端接收第一终端发送的指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
所述第二终端根据所述指示消息，在所述时频资源上向所述第三终端发送所述协作消息。
本申请实施例中，第二终端根据第一终端发送的第一信息的指示，与第一终端一起在相同的时频资源上向相同的目的地发送相同的信息，能够使得第二信息得到功率增益，也就是说可以变相地扩大该第二信息的覆盖范围，使得距离相对较远的第三终端能够接收到该第二信息。
结合第二方面，在第二方面的某些可能的实现方式中，所述协作消息包括发现消息、数据消息或同步消息。
结合第二方面，在第二方面的某些可能的实现方式中，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
可选地，所述指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二 字段用于指示所述MAC SDU是否包括所述第一字段。
结合第二方面，在第二方面的某些可能的实现方式中，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
结合第二方面，在第二方面的某些可能的实现方式中，所述指示消息还包括所述第三终端的地址信息。
第三方面，提供了一种终端，包括：第一发送单元和第二发送单元，该终端能够实现前述第一方面及其各个实现方式所述的用于协作消息传输的方法。
第四方面，提供了一种终端，包括：处理器、收发器和存储器。该存储器用于存储代码，处理器用于执行所述存储器中的代码，当所述代码被执行时，所述处理器可以通过收发器实现前述第一方面及各个实现方式所述的用于协作消息传输的方法。
第五方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储有程序，所述程序使得终端执行上述第一方面及其各种实现方式中的任一种用于协作消息传输的方法。
附图说明
图1是D2D传输场景的一个示意图。
图2是本申请实施例的用于协作消息传输的一个场景示意图。
图3是本申请实施例的协作消息传输的方法的一个示意性流程图。
图4是本申请实施例的指示消息与协作消息的一个示意图。
图5是本申请实施例的指示消息与协作消息的另一个示意图。
图6是本申请实施例的指示消息与协作消息的另一个示意图。
图7是本申请实施例的指示消息与协作消息的另一个示意图。
图8是本申请实施例的指示消息与协作消息的另一个示意图。
图9是本申请实施例的指示消息与协作消息的另一个示意图。
图10是本申请实施例的携带指示消息的MAC PDU的一个示意图。
图11是本申请实施例的协作消息传输的方法的另一个示意性流程图。
图12是本申请实施例的协作消息传输的方法的另一个示意性流程图.
图13是本申请实施例的终端的一个结构框图。
图14是本申请实施例的终端的另一个结构框图。
图15是本申请实施例的终端的另一个结构框图。
图16是本申请实施例的终端的另一个结构框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
应理解，在本申请实施例中，终端可称为用户设备(User Equipment，UE)、接入终端、终端设备、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置。终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及 未来新无线(New Radio，NR)网络中的终端设备等。
D2D通信是一种直联通信技术。终端之间的数据交互不需要通过基站进行转发。终端之间可以直接进行交互或者在网络的辅助作用下直接进行交互。
在第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)长期演进(Long Term Evolution，LTE)的D2D描述中，定义了用于进行D2D信息收发的资源为D2D资源池(D2D Resource Pool)，具体地，用于发送信息的资源池称为发送资源池，用于接收信息的资源池为接收资源池。D2D资源池在频域上是由一系列资源块(Resource Block，RB)组成，在时域上由一系列符号(Symbol)组成。在3GPP LTE D2D中，SL的RB和符号的定义可以与蜂窝通信的上行链路(Uplink，UL)相同。
D2D通信的工作场景可以包括：IC和OoC。如图1所示，终端20和终端30处于基站10的服务范围60之内，终端40和终端50处于基站10的服务范围60之外。终端20与终端30之间的D2D通信属于IC的工作场景；终端40与终端50之间的D2D通信属于OoC的工作场景。
在OoC场景，由于没有关联到任何网络设备(如基站，eNB)，无法由网络来分配/配置资源池，终端40和终端50必须按照自身预先配置的资源池来收发信息。
在OoC场景，终端40会在预先定义的接收资源池(Resource Pool)中搜寻边链路同步信号(Sidelink Synchronization Signal，SLSS)以及边链路主系统信息块(Master Information Block-Sidelink，MIB-SL)。如果在一定时间内没有接收到SLSS或MIB-SL，则终端40将会在预先定义的发送资源池中主动发送SLSS和/或MIB-SL，并通过在预定义的数值范围内随机选择一个数值作为SLSS标识(Identity，ID)来标识自己。如果终端50收到来自终端40的SLSS和/或MIB-SL，并通过正确解码获得相应的同步信号和/或系统信息，终端50便可以与发送SLSS和/或MIB-SL的终端40(称为SyncRef终端)进行同步，同时终端50可以配置与终端40相同的SLSS ID用于来标识自己。终端50也可以按照终端40所包含的同步信号和/或系统信息的内容，来发送SLSS和/或MIB-SL。这样，其他终端可以与该已同步的终端(即终端50)进行同步，从而间接地与终端40完成同步。
D2D通信大致可以分为D2D发现和D2D传输两个阶段。其中，D2D发现是指终端发送发现消息(discovery announcement)，而其他终端通过读取该发现消息而获得发送该发现消息的终端的信息。该发现消息可以包括发送该发现消息的终端的身份信息，例如标识(identity)。D2D传输是指终端发送控制信息和数据。其他终端通过读取该控制信息得到后续的数据的传输格式等信息，从而正确接收后续的数据。
以图1中的终端40和终端50为例，在OoC场景，终端40会在预先定义的发送资源池中的物理边链路发现信道(Physical Sidelink Discovery Channel，PSDCH)上发送发现消息(Discovery announcement)。同理，终端50也会在预先定义的接收资源池中的PSDCH上搜寻发现消息。正确接收到发现消息的终端50便可以发现发送方(即发送发现消息的终端40)，从而完成发现流程。在OoC场景的D2D传输中，终端没有关联到任何网络设备(如基站，eNB)，因而无法获得由网络来分配配置资源池。终端必须按照自身预先配置的资源池来收发信息以实现通信。举例来说，终端40会在预先定义的发送资源池中的物理边链路控制信道(Physical Sidelink Control Channel，PSCCH)上发送边链路控制信息(Sidelink Control Information，SCI)格式0(Format 0)信令。在物理边 链路共享信道(Physical Sidelink Shared Channel，PSSCH)上发送介质访问控制协议数据单元(Media Access Control Protocol Data Unit，MAC PDU)，即数据包。通过在利用预先定理的发送资源池中的资源向终端50发送信令或数据，终端40可以实现与终端50的通信。
其中，SCI格式0用于调度PSSCH，也就是，终端50需要根据正确接收的SCI格式0中的信息来解码终端40所发出的PSSCH，进而获得数据包中的信息。SCI格式0所包含的信息可以如下表1所示：
表1
Figure PCTCN2017091647-appb-000001
举例来说，图2中所示的终端11和两个终端12，可以按照上述的方法完成相互之间的同步，并进行D2D通信。当该三个终端均处于OoC状态时，没有任何一方可以与外界进行通信交互。例如，在自然灾害救援中，终端11和两个终端12处于受困待紧急救援中，并且由于某种原因(例如，网络瘫痪)处于OoC状态。因此需要考虑如何使得该三个终端与外界进行通信交互(连接到网络)。
图3是本申请实施例的协作消息传输的方法的示意性流程图。应注意，尽管图3中协作消息的发送端示出了两个终端：终端11和终端12，实际上终端的数量可以为三个或更多个，或者，可以理解为，终端12代表至少一个终端，本申请对此不限定。图3所示的方法包括：
S102，终端11向终端12发送指示消息。
S104，终端11与终端12一起，在相同的时频资源上发送协作消息。
这里，终端11可以称为指示消息的发送端，终端12可以称为指示消息的接收端，且指示消息的接收端的数量可以为一个或多个。
具体地，在S102中，终端11通过SL发送指示消息，该指示消息可以包括时频资源 的指示信息，且该指示消息用于指示接收端(如终端12)在该时频资源上发送协作消息。
本申请实施例中，协作消息可以为发现消息、数据消息或同步消息。其中，数据消息可以是在PSSCH上发送的包含控制信息和/或数据信息的消息。同步消息可以包括同步信号，例如为SLSS。
本申请实施例中，终端11发送指示消息以发起与终端12的协作传输，可以称为主协调方，或者称为主协作终端(Master Cooperation终端，MC-终端)。
可选地，本申请实施例中，在S102之前，还可以包括：终端11与终端12完成D2D同步。其中，MC-终端可以在D2D的同步过程中确定，具体地，如果终端11在一段时间内不能检测出SLSS，终端11选择主动发送SLSS和MIB-SL以供其他终端可以和自身同步，随后终端12检测到终端11的同步信号并与终端11进行同步，则此时终端11可以作为MC-终端发起EU协作。MC-终端的选择亦可以通过终端11与终端12之间的信令交互来协商确定，例如终端11主动发起D2D通信，要求成为MC-终端，经过终端11与终端12之间的交互确定终端11为MC-终端。
作为一种实现方式，在S102中，终端11可以在第一物理信道上发送该指示消息。其中，该第一物理信道为控制信道，作为一例，该第一物理信道为物理边链路控制信道(Physical Sidelink Control Channel，PSCCH)。
可选地，指示消息可以为一个新定义的L1层控制信令，例如LTE中的SCI格式，即SCI格式1。该SCI格式1所包含的内容可以如下的表2所示：
表2
Figure PCTCN2017091647-appb-000002
具体地，终端11可以通过端到端的接口(例如LTE中的PC-5)，在预先定义的发送资源池中选择用于PSCCH的时频资源(即发送资源)来发送SCI格式1。
其中的“资源块分配和跳频资源分配”和“时间资源模式”为时频资源的指示信息。也就是说，本申请实施例中的指示消息包括时频资源的指示信息。
如图4所示，在S102中，指示消息的发送端为终端11，指示消息的接收端为终端12，且该指示消息为在PSCCH上发送的SCI格式1。相对应地，图5表示在S104中，协作消息的发送端为终端11和终端12，协作消息的接收端为终端13，且终端11与终端12在相同的时频资源上发送该协作消息，其中指示消息包括该时频资源的指示信息。
参照前述表1的SCI格式0可知，SCI格式1在SCI格式0的基础上增加了标示(Flag)。也就是说，本申请实施例中的指示消息还可以进一步包括标示(Flag)。可选地，该标示为第一标示，第二标示或第三标示，其中，第一标示用于指示终端12在所述时频资源上发送发现消息；第二标示用于指示终端12在所述时频资源上发送数据消息；第三标示用于指示终端12在所述时频资源上发送同步消息。或者，第一标示用于指示终端12在所述时频资源上，在物理边链路发现信道(Physical Sidelink Discovery Channel，PSDCH)上发送发现消息；第二标示用于指示终端12在所述时频资源上，在物理边链路共享信道(Physical Sidelink Shared Channel，PSSCH)发送数据消息；第三标示用于指示终端12在专用于发送同步信号(synchronization signal，SS)的时频资源上发送同步消息，例如，可以在物理同步信道上发送同步消息。
可选地，本申请实施例中的标示的长度可以为2比特。举例来说，“01”表示第一标示，“10”表示第二标示，“11”表示第三标示。或者，举例来说，“00”表示第一标示，“01”表示第二标示，“10”表示第三标示。等等，本申请对此不作限定。
可选地，本申请实施例中的标示的长度也可以为1比特。利用该比特的第一值和第二值来分别指示发送发现消息以及发送数据消息。举例来说，“0”表示第一标示，“1”表示第二标示。其中，第一标示用于指示终端12在所述时频资源上发送发现消息；第二标示用于指示终端12在所述时频资源上发送数据消息。
作为另一种理解，指示消息用于指示终端12在所述时频资源上发送协作消息。或者指示消息用于指示在第二物理信道上发送协作消息，其中，第二物理信道占用的时频资源即为所述时频资源。其中，若指示消息中的标示为第一标示，则第二物理信道为发现信道，如PSDCH，协作消息为发现消息。若指示消息中的标示为第二标示，则第二物理信道为共享信道，如PSSCH，协作消息为数据消息。若指示消息中的标示为第三标示，则第二物理信道为物理同步信道(即专用于发送同步信号的时频资源)，协作消息为同步消息。
其中，第一标示可以为格式1A(可以认为是SCI Format 1的一个子类)，第二标示可以为格式1B(可以认为是SCI Format 1的一个子类)，第三标示可以为格式1C(可以认为是SCI Format 1的一个子类)。也就是说，该标示可以为格式1A或格式1B或格式1C，相应地，可以认为SCI格式1包括三种子格式，分别为SCI格式1A、SCI格式1B和SCI格式1C。
具体地，若表2中的标示为格式1A，则为子格式SCI格式1A；若表2中的标示为格式1B，则为子格式SCI格式1B；若表2中的标示为格式1C，则为子格式SCI格式1C。
其中，格式1A可以用于指示终端12发送发现消息。格式1B可以用于指示终端12发送数据消息。格式1C可以用于指示终端12发送同步消息。
对于终端12来说，可以根据所接收到的消息的长度确定所收到的是SCI格式0还是 SCI格式1。如果确定为SCI格式1，进一步可以根据标示(Flag)的内容确定子格式为SCI格式1A或SCI格式1B或SCI格式1C，从而终端12可以确定将要发送的协作消息为发现消息或数据消息或同步消息。
可选地，终端12可以参照用于区分不同下行控制信息(Downlink Control Information，DCI)Format的方式区分SCI格式0与SCI格式1，这里不再赘述。
其中，作为一例，若S102中的指示消息中的标示为格式1B，即指示消息的子格式SCI格式1B。那么在S104中，终端11和终端12可以在发送数据消息之前先向终端13发送控制信息。
如图6所示，图6表示在S102中，指示消息的发送端为终端11，指示消息的接收端为终端12，且该指示消息为在PSCCH上发送的SCI格式1B。相对应地，图7表示在S104中，协作消息的发送端为终端11和终端12，协作消息的接收端为终端13。终端11和终端12在相同的时频资源上向终端13发送控制信息，随后再在另一相同的时频资源上发送数据消息。其中，终端11与终端12发送的数据消息的内容是相同或一致的。例如，终端11与终端12发送的数据消息都用于指示终端13将所述协作消息转发至其他设备。
具体地，如图7所示，终端11和终端12可以在相同的时频资源上(例如在PSCCH上发送控制信息)，该控制信息为SCI格式0。其中，发送控制信息的时频资源的指示信息包括在S102的指示消息中。进一步地，终端13根据正确接收的SCI格式0中的信息来解码终端11和终端12在相同的另一时频资源上(例如在PSSCH所发送的数据)，该数据为边链路数据(Sidelink Data，SL Data)。其中，发送数据的时频资源(即相同的另一时频资源)可以是由控制消息(即SCI格式0)指示的。
作为另一种实现方式，在S102中，终端11可以通过L2层的数据包，即通过特殊的媒体访问控制(Media Access Control，MAC)协议数据单元(Protocol Data Unit，PDU)承载该指示消息。此处的MAC PDU的特殊之处体现在其并不携带传统的数据信息，而是携带控制信息。并且，相比于传统的PSSCH MAC PDU，其不需要携带子头域(sub-header)。也就是说，上述如表2所示SCI格式1的内容可以承载在与PSCCH对应的数据消息中。
可选地，在S102之前，还可以包括：终端11在控制信道上发送控制信息。这里的控制信道为PSCCH，控制信息为SCI格式0。进一步地，在S102中，终端11在共享信道上发送MAC PDU。
也就是说，在S102中，终端11可以在第一物理信道上发送该指示消息。其中，该第一物理信道为共享信道，例如为PSSCH。且该指示消息携带在MAC PDU中。
其中，终端11可以事先配置PSCCH的控制信令SCI格式0，并使用SCI格式0所指示的时频资源发送MAC PDU。相应地，终端12接收SCI格式0，并在SCI格式0所指示的时频资源上，按照指定的方式解码PSSCH上由终端11发送的数据包，即MAC PDU。
如图8所示，图8表示在S102中，发送端为终端11，接收端为终端12。终端11在PSCCH上发送控制消息，该控制消息为SCI格式0，随后终端11在PSSCH上发送MAC PDU。其中指示信息携带在该MAC PDU中。相对应地，图9表示在S104中，协作消息的发送端为终端11和终端12，协作消息的接收端为终端13。且终端11与终端12在相 同的时频资源上发送协作消息。可理解，若图9中的终端11和终端12发送数据，可以参照图7所示的过程，这里不再赘述。
其中，MAC PDU可以包括MAC头域(header)和MAC服务数据单元(Service Data Unit，SDU)，如图10所示。指示消息为MAC PDU。或指示消息为MAC SDU，该MAC SDU包括在MAC PDU中，且MAC PDU还包括MAC头域。其中，MAC SDU包括第一字段，MAC头域包括第二字段。该第二字段用于指示MAC SDU包括第一字段，该第一字段用于指示终端12发送协作消息。可选地，第一字段可以为标示(Flag)，第二字段可以为协作指示(Cooperation Flag，CF)，如下所述。
本申请实施例中的MAC头域可以为专用于D2D通信的MAC子头域，该MAC子头域包括一个“协作指示(Cooperation Flag，CF)”。可选地，当CF字段的值为第一值时，MAC子头域所在的MAC PDU为协作数据包(Cooperation MAC PDU)。相应的MAC SDU为协作MAC SDU(Cooperation MAC SDU)。协作MAC SDU包括标示(Flag)字段。当CF字段的值为第二值时，MAC SDU不包括标示(Flag)字段。本申请实施例中，协作MAC PDU是指包括协作MAC SDU的MAC PDU，其中，协作MAC SDU包括上述的SCI格式1的格式和内容。
在一种可能的实现方式中，本申请实施例中的MAC头域包括SL-SCH子头域，不再包括R/E/E/L/LCID/L子头域。具体地，现有的LTE协议中，MAC头域除了包括SL-SCH子头域，还必须包括一个R/E/E/L/LCID/L子头域来对应MAC SDU。然而，在本申请实施例中SL-SCH子头域中的CF字段可以用于指示是否为协作MAC PDU(例如，CF＝1表示该MAC PDU为协作MAC PDU)。也就是说，本申请实施例中的MAC PDU已经不是传统的数据包，其中的MAC SDU的格式是固定的(即SCI格式1的格式)，因此无需再包括R/E/E/L/LCID/L子头域。
如图10所示，其中的MAC头域包括版本(Version，V)字段、CF字段、源地址(SRC)字段和目的地址(DST)字段，另外还可以包括一个或多个预留(R)字段，图10中示出了3个R字段。其中，V字段用于表示该MAC PDU格式版本。R字段为预留比特，默认设置可以为0。SRC字段为层2源标识(Source Layer-2ID)，用于标识源。DST字段为层2目标标识(Destination Layer-2ID)，用于标识目标。
如图10所示，其中的MAC SDU包括标示(Flag)、跳频标示(Frequency hopping flag)、资源块分配和跳频资源分配(Resource block assignment and hopping resource allocation)、时间资源模式(Time resource pattern)、调制和编码方式(Modulation and Coding Scheme，MCS)、定时提前指示(Timing advance indication)、和组目标地址(Group destination ID)。
可理解，MAC头域中的CF字段可以用于指示MAC SDU是否包括标示(Flag)字段。例如，作为一例，CF字段的值为1指示该MAC SDU包括标示(Flag)字段；该CF字段的值为0指示该MAC SDU不包括标示(Flag)字段。或者，作为另一例，CF字段的值为0指示该MAC SDU包括标示(Flag)字段；该CF字段的值为1指示该MAC SDU不包括标示(Flag)字段。
相应地，对于终端12来说，可以根据MAC头域中的CF字段确定相应的MAC SDU是否包括标示(Flag)字段。
对照前述的表2，可见MAC SDU所包括的内容与前述SCI格式1所包括的内容相同。可选地，本申请实施例中的标示字段可以包括第一标示或第二标示或第三标示。相 应地，关于该标示的描述可以参见上述实施例的相关描述，为避免重复，这里不再赘述。
可选地，利用MAC头域中的预留字段(或预留字段的一部分)指示协作消息的类型(例如指示协作消息是发现消息)。此时，MAC SDU中无需标示(Flag)字段，MAC头域中也无需单独定义CF字段。
另外，可选地，指示消息还可以进一步包括协作消息的目的地址信息，例如终端13的地址信息。这样，终端12可以根据该指示消息所包括的目的地址信息，直接确定将要发送的协作消息的目的地址。
进一步地，在S104中，具体地，终端11与终端12使用相同的MCS，在相同的时频资源上，向相同的目标地址(如终端13)发送相同的协作消息。
作为一例，该相同的目标地址可以是广播地址或预先设定好的特殊地址。举例来说，如果终端11和终端12均不知道是否存在至少一个终端13时，则在S104中，终端11和终端12可以使用广播地址或预先设定好的特殊地址作为目标地址。其中，预先设定好的特殊地址可以是指专用于接收协作消息的地址，例如，可在标准中预先设定。相应地，终端13可以根据该广播地址或预先设定好的特殊地址接收协作消息。
可选地，在发送协作消息时，可以设定协作目标标识(Cooperation Destination ID)，该协作目标标识为广播地址或预先设定好的特殊地址。相应地，还可以设定与协作目标标识对应的协作源标识(Cooperation Source ID)。这样，能够便于协作消息的发送端和接收端进行信息收发。
作为另一例，如果终端11和终端12中任何一个终端知道存在至少一个终端13时，终端11和终端12便可以使用终端13的地址作为目标地址。
有可能是，终端13曾经通过某种途径使得终端11和/或终端12获知终端13的地址信息。例如，终端13可以使用本申请实施例的协作消息传输的方法使得终端11和/或终端12接收到终端13的协作消息。若终端11已经知道终端13的存在，那么，作为一种实现方式，指示消息可以包括终端13的地址信息。若指示消息包括终端13的地址信息，则在S104中，终端11与终端12一起向终端13发送协作消息。若终端12已经知道终端13的存在，那么，可以在终端11与终端12的先前D2D传输中，由终端12将终端13的地址信息通知终端11。
这样，协作消息将会得到功率增益，也就是说可以扩大该协作消息的覆盖范围，使得距离相对较远的终端13能够接收到该协作消息。
可选地，本申请实施例中的协作消息可以包括特殊信息，该特殊信息用于指示终端13将该协作消息转发至其他设备。
举例来说，如果终端13处于网络覆盖范围内，也就是说，终端13能够直接与网络设备进行通信，则终端13可以将该协作消息转发至所在的小区的网络设备(如基站)。举例来说，终端13可以将该协作消息转发至能够与终端13进行通信的其他的中继终端或D2D终端等。
另外，应注意，尽管本申请上述实施例假设终端11与终端12处于OoC场景，本申请上述的方法也可以应用于IC的场景。也就是说，若终端11与终端12处于网络覆盖范围之内，也可以通过上述的协作消息传输的方法实现功率增益，例如，图3中的终端11可以替换为终端20，终端12可以替换为终端30等，本申请对此不限定。
图11是本申请实施例的协作消息传输的方法的另一个示意性流程图。图11所示的 方法由第一终端执行，其中，该第一终端可以为前述实施例中的终端11，该方法包括：
S201，第一终端向第二终端发送第一信息，该第一信息用于指示第二终端发送第二信息。
S202，第一终端，与所述第二终端一起，在相同的时频资源上向第三终端发送所述第二信息。
本申请实施例中，通过第一终端发送的第一信息的指示，第一终端与第二终端一起在相同的时频资源上向相同的目的地发送相同的信息，能够使得第二信息得到功率增益，也就是说可以变相地扩大该第二信息的覆盖范围，使得距离相对较远的第三终端能够接收到该第二信息。
可选地，第一信息可以是第一终端在第一终端与第二终端之间的SL上发送的。其中，该第一信息可以承载在第一物理信道上，该第一物理信道可以为控制信道或共享信道。例如，控制信道为PSCCH，共享信道为PSSCH。
可选地，第二信息可以为发现消息或数据消息(如包括SL数据)或同步消息(如包括SLSS)。其中，第二信息可以承载在第二物理信道上。例如，若第二信息为发现消息，第二物理信道为控制信道(如PSDCH)；若第二信息为数据消息(如SL Data)，第二物理信道为共享信道(如PSSCH)；若第二信息为同步消息(如SLSS)，第二物理信道为专用于发送同步信号的时频资源信道(可理解为物理同步信道)。
可选地，S202中的时频资源可以是预先约定的，可以是第一终端在S201之前的信令或信息中指示的，可以是S201中的第一信息所指示的，本申请对此不限定。
作为一种实现方式，该第一信息为指示消息，第二信息为协作消息。且该指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息。其中，S201可以参照前述图3的实施例中S102所述，S202可以参照前述图3的实施例中S104所述，为避免重复，这里不再赘述。
图12是本申请实施例的协作消息传输的方法的另一个示意性流程图。图12所示的方法由第二终端执行，其中，该第二终端可以为前述实施例中的终端12，该方法包括：
S301，第二终端接收第一终端发送的第一信息，该第一信息用于指示第二终端发送第二信息。
S302，所述第二终端根据所述第一信息，与第一终端一起，在相同的时频资源上向第三终端发送所述第二信息。
本申请实施例中，第二终端根据第一终端发送的第一信息的指示，与第一终端一起在相同的时频资源上向相同的目的地发送相同的信息，能够使得第二信息得到功率增益，也就是说可以变相地扩大该第二信息的覆盖范围，使得距离相对较远的第三终端能够接收到该第二信息。
可选地，该第一信息可以承载在第一物理信道上，该第一物理信道可以为控制信道或共享信道。例如，控制信道为PSCCH，共享信道为PSSCH。
可选地，第二信息可以为发现消息或数据消息(如包括SL数据)或同步消息(如包括SLSS)。其中，第二信息可以承载在第二物理信道上。例如，若第二信息为发现消息，第二物理信道为控制信道(如PSDCH)；若第二信息为数据消息，第二物理信道为共享信道(如PSSCH)；若第二信息为同步消息，第二物理信道为专用于发送同步信号的时频资源信道(可理解为物理同步信道)。
可选地，S302中的时频资源可以是预先约定的，可以是第一终端在S301之前的信令或信息中指示的，可以是S301中的第一信息所指示的，本申请对此不限定。
作为一种实现方式，该第一信息为指示消息，第二信息为协作消息。且该指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息。其中，S301可以参照前述图3的实施例中S102所述，S302可以参照前述图3的实施例中S104所述，为避免重复，这里不再赘述。
图13是本申请实施例的终端的一个结构框图。图13所示的终端100包括第一发送单元401和第二发送单元402。
第一发送单元401用于向第二终端发送第一信息，该第一信息用于指示第二终端发送第二信息。
第二发送单元402用于与所述第二终端一起，在相同的时频资源上向第三终端发送所述第二信息。
可选地，第一信息可以为指示消息，第二信息可以为协作消息。相应地，第一发送单元401用于向第二终端发送指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；第二发送单元402用于与所述第二终端一起，在所述时频资源上向所述第三终端发送所述协作消息。
可选地，第一发送单元402可以具体用于在第一物理信道上，通过终端100与第二终端之间的SL，向第二终端发送指示消息。
作为一例，第一物理信道为控制信道，如PSCCH。
作为另一例，第一物理信道为共享信道，如PSSCH。且第一发送单元401在发送指示消息之前，还用于在PSCCH上向第二终端发送控制信息，该控制信息用于指示该指示消息的时频资源等。
可选地，第二发送单元402可以具体用于在第二物理信道上，与第二终端一起使用相同的时频资源，向第三终端发送协作消息。
作为一例，第二物理信道为控制信道，如PSDCH，相应地，协作消息为发现消息。
作为另一例，第二物理信道为共享信道，如PSSCH，相应地，协作消息为数据消息。
作为另一例，第二物理信道为专用于发送同步信号的时频资源信道(可理解为物理同步信道)，相应地，协作消息为同步消息。
可理解，图13中的第一发送单元401和第二发送单元402可以由收发器实现，如图14所示，终端100包括处理器410、收发器420、存储器430。其中，存储器430用于存储处理器410所执行的指令。处理器410具体用于通过收发器420向第二终端发送指示消息，并与第二终端一起在相同的时频资源上向第三终端发送协作消息。
该终端100中的各个组件通过总线系统440耦合在一起，其中总线系统440除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
图13所示的终端100或图14所示的终端100能够实现前述图3至图12的方法实施例中由终端11执行的各个过程，为避免重复，这里不再赘述。
图15是本申请实施例的终端的一个结构框图。图15所示的终端200包括接收单元501和发送单元502。
接收单元501用于接收第一终端发送的第一信息，该第一信息用于指示第二终端发 送第二信息。
发送单元502用于根据所述接收单元501接收到的所述第一信息，与第一终端一起，在相同的时频资源上向第三终端发送所述第二信息。
可选地，第一信息可以为指示消息，第二信息可以为协作消息。相应地，接收单元501用于接收第一终端发送的指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；发送单元502用于根据所述接收单元501接收到的所述指示消息，在所述时频资源上向所述第三终端发送所述协作消息。
可选地，接收单元501可以具体用于在第一物理信道上，通过终端200与第一终端之间的SL，接收第一终端发送的指示消息。
作为一例，第一物理信道为控制信道，如PSCCH。
作为另一例，第一物理信道为共享信道，如PSSCH。且第一发送单元401在发送指示消息之前，还用于在PSCCH上向第二终端发送控制信息，该控制信息用于指示该指示消息的时频资源等。
可选地，发送单元502可以具体用于在第二物理信道上，与第一终端一起使用相同的时频资源，向第三终端发送协作消息。
作为一例，第二物理信道为控制信道，如PSDCH，相应地，协作消息为发现消息。
作为另一例，第二物理信道为共享信道，如PSSCH，相应地，协作消息为数据消息。
作为另一例，第二物理信道为专用于发送同步信号的时频资源信道(可理解为物理同步信道)，相应地，协作消息为同步消息。
可理解，图15中的接收单元501可以由接收器实现，发送单元502可以由发送器实现，如图16所示，终端200包括处理器510、接收器520、发送器503、存储器540。其中，存储器540用于存储处理器510所执行的指令。处理器510具体用于通过接收器520接收第一终端发送的指示消息，并通过发送器520与第一终端一起在相同的时频资源上向第三终端发送协作消息。
该终端200中的各个组件通过总线系统550耦合在一起，其中总线系统550除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
图15所示的终端200或图16所示的终端200能够实现前述图3至图12的方法实施例中由终端12执行的各个过程，为避免重复，这里不再赘述。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品可以包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时， 全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁盘)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (24)

  1. 一种协作消息传输的方法，其特征在于，包括：
    第一终端向第二终端发送指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
    所述第一终端，与所述第二终端一起，在所述时频资源上向所述第三终端发送所述协作消息。
  2. 根据权利要求1所述的方法，其特征在于，所述协作消息包括发现消息、数据消息或同步消息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
  4. 根据权利要求3所述的方法，其特征在于，所述指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二字段用于指示所述MAC SDU是否包括所述第一字段。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述指示消息还包括所述第三终端的地址信息。
  7. 一种协作消息传输的方法，其特征在于，包括：
    第二终端接收第一终端发送的指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
    所述第二终端根据所述指示消息，在所述时频资源上向所述第三终端发送所述协作消息。
  8. 根据权利要求7所述的方法，其特征在于，所述协作消息包括发现消息、数据消息或同步消息。
  9. 根据权利要求7或8所述的方法，其特征在于，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
  10. 根据权利要求9所述的方法，其特征在于，所述指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二字段用于指示所述MAC SDU是否包括所述第一字段。
  11. 根据权利要求7至10任一项所述的方法，其特征在于，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
  12. 根据权利要求7至11任一项所述的方法，其特征在于，所述指示消息还包括所述第三终端的地址信息。
  13. 一种终端，其特征在于，包括：
    第一发送单元，用于向第二终端发送指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
    第二发送单元，用于与所述第二终端一起，在所述时频资源上向所述第三终端发送所述协作消息。
  14. 根据权利要求13所述的终端，其特征在于，所述协作消息包括发现消息、数据消息或同步消息。
  15. 根据权利要求13或14所述的终端，其特征在于，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
  16. 根据权利要求15所述的终端，其特征在于，所述指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二字段用于指示所述MAC SDU是否包括所述第一字段。
  17. 根据权利要求13至16任一项所述的终端，其特征在于，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
  18. 根据权利要求13至17任一项所述的终端，其特征在于，所述指示消息还包括所述第三终端的地址信息。
  19. 一种终端，其特征在于，包括：
    接收单元，用于接收第一终端发送的指示消息，所述指示消息包括时频资源的指示信息，所述指示消息用于指示所述第二终端在所述时频资源上向第三终端发送协作消息；
    发送单元，用于根据所述接收单元接收到的所述指示消息，在所述时频资源上向所述第三终端发送所述协作消息。
  20. 根据权利要求19所述的终端，其特征在于，所述协作消息包括发现消息、数据消息或同步消息。
  21. 根据权利要求19或20所述的终端，其特征在于，所述指示消息包括媒体接入控制MAC服务数据单元SDU，所述MAC SDU的第一字段用于指示所述第二终端向所述第三终端发送所述协作消息。
  22. 根据权利要求21所述的终端，其特征在于，所述指示消息还包括MAC头域，所述MAC头域包括第二字段，所述第二字段用于指示所述MAC SDU是否包括所述第一字段。
  23. 根据权利要求19至22任一项所述的终端，其特征在于，所述协作消息包括特殊信息，所述特殊信息用于指示所述第三终端将所述协作消息转发至其他设备。
  24. 根据权利要求19至23任一项所述的终端，其特征在于，所述指示消息还包括所述第三终端的地址信息。
PCT/CN2017/091647 2016-08-04 2017-07-04 协作消息传输的方法及终端 WO2018024066A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610631228.XA CN107690129A (zh) 2016-08-04 2016-08-04 协作消息传输的方法及终端
CN201610631228.X 2016-08-04

Publications (1)

Publication Number Publication Date
WO2018024066A1 true WO2018024066A1 (zh) 2018-02-08

Family

ID=61073397

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/091647 WO2018024066A1 (zh) 2016-08-04 2017-07-04 协作消息传输的方法及终端

Country Status (2)

Country Link
CN (1) CN107690129A (zh)
WO (1) WO2018024066A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115550497A (zh) * 2022-01-05 2022-12-30 荣耀终端有限公司 消息协同方法和装置
US20230147231A1 (en) * 2021-11-05 2023-05-11 Qualcomm Incorporated Device cooperation for mitigation of deafness in sidelink communications

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536261B (zh) * 2018-09-28 2023-06-30 中兴通讯股份有限公司 V2x通信方法及设备、计算机可读存储介质
CN111526587B (zh) * 2019-02-01 2024-02-02 大唐移动通信设备有限公司 一种侧行链路资源的配置方法、装置及设备
CN114762366B (zh) * 2019-11-29 2023-09-01 华为技术有限公司 下行传输方法及通信装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130161505A1 (en) * 2011-04-07 2013-06-27 Seagate Technology Llc Methods of forming layers
CN104205662A (zh) * 2012-11-29 2014-12-10 华为技术有限公司 一种上行mu-mimo的方法及系统
CN104662817A (zh) * 2012-10-05 2015-05-27 华为技术有限公司 无线网络中基于终端的分组虚拟发送和接收
CN105553612A (zh) * 2015-12-10 2016-05-04 上海华为技术有限公司 一种d2d通信链路的传输方法和基站以及终端

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104618926B (zh) * 2013-11-01 2018-07-03 电信科学技术研究院 D2d信号的传输方法和装置
CN104811909B (zh) * 2014-01-27 2019-09-10 中兴通讯股份有限公司 设备到设备广播信息的发送、接收方法及装置、传输系统
US20150264588A1 (en) * 2014-03-14 2015-09-17 Samsung Electronics Co., Ltd. Methods and apparatus for synchronization in device-to-device communication networks
US10212699B2 (en) * 2014-04-21 2019-02-19 Lg Electronics Inc. Method for transmitting and receiving downlink control information in wireless communication system supporting device-to-device communication and device therefor
WO2016034107A1 (en) * 2014-09-03 2016-03-10 Huawei Technologies Co., Ltd. System and method for d2d resource allocation
CN105592550B (zh) * 2014-11-17 2019-05-24 电信科学技术研究院 一种资源分配方法、设备及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130161505A1 (en) * 2011-04-07 2013-06-27 Seagate Technology Llc Methods of forming layers
CN104662817A (zh) * 2012-10-05 2015-05-27 华为技术有限公司 无线网络中基于终端的分组虚拟发送和接收
CN104205662A (zh) * 2012-11-29 2014-12-10 华为技术有限公司 一种上行mu-mimo的方法及系统
CN105553612A (zh) * 2015-12-10 2016-05-04 上海华为技术有限公司 一种d2d通信链路的传输方法和基站以及终端

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230147231A1 (en) * 2021-11-05 2023-05-11 Qualcomm Incorporated Device cooperation for mitigation of deafness in sidelink communications
CN115550497A (zh) * 2022-01-05 2022-12-30 荣耀终端有限公司 消息协同方法和装置

Also Published As

Publication number Publication date
CN107690129A (zh) 2018-02-13

Similar Documents

Publication Publication Date Title
WO2018024066A1 (zh) 协作消息传输的方法及终端
JP6392338B2 (ja) ワイヤレスネットワークにおいて応答インジケーション延期を動的に設定するためのシステム、方法、及びデバイス
WO2018084199A1 (ja) 通信方法
JP6239280B2 (ja) ユーザ端末、プロセッサ及び移動通信システム
CN109716700B (zh) 一种指示方法及相关设备
WO2016049890A1 (zh) 数据传输方法和设备
WO2016202227A1 (zh) 一种层2链路标识的选择、通知方法及装置
US20140247785A1 (en) Method, terminal, and base station for cooperative communication
US10834785B2 (en) Radio terminal and base station for controlling direct communication between radio terminals
US20180332574A1 (en) Methods and Apparatuses for Device-to-Device Communication
CN107925625B (zh) D2d通信系统中指示用于中继数据的优先级的方法及其设备
JP2018523347A (ja) 端末装置、ネットワーク装置、およびデータ伝送方法
JP6077680B2 (ja) ユーザ端末、移動通信方法及びプロセッサ
CN112602358A (zh) 数据传输方法，装置及系统
WO2017132996A1 (zh) 业务传输方法和通信设备
CN113597780A (zh) 通过PC5接口实现V2x单播通信的过程
JP6231201B2 (ja) 高効率ワイヤレスネットワーク中での向上された通信効率のためのシステムおよび方法
WO2015141847A1 (ja) 通信制御方法及び基地局
EP3723446B1 (en) Relay transmission method and relay node
WO2015055142A1 (zh) 发现信号的发送和接收方法、以及发送和接收装置
WO2018223824A1 (zh) 一种业务数据传输方法及装置
CN110402596B (zh) 无线通信装置及无线通信方法
WO2018145292A1 (zh) 通信方法、装置和系统
US20220240328A1 (en) Unicast connection establishment method and apparatus, and storage medium
US20230086337A1 (en) Methods, infrastructure equipment and wireless communications networks

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17836248

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17836248

Country of ref document: EP

Kind code of ref document: A1