WO2023116534A1 - 接入消息的发送和接收方法、装置及可读存储介质 - Google Patents

接入消息的发送和接收方法、装置及可读存储介质 Download PDF

Info

Publication number
WO2023116534A1
WO2023116534A1 PCT/CN2022/139041 CN2022139041W WO2023116534A1 WO 2023116534 A1 WO2023116534 A1 WO 2023116534A1 CN 2022139041 W CN2022139041 W CN 2022139041W WO 2023116534 A1 WO2023116534 A1 WO 2023116534A1
Authority
WO
WIPO (PCT)
Prior art keywords
synchronization
communication device
offset indication
synchronization signal
synchronization offset
Prior art date
Application number
PCT/CN2022/139041
Other languages
English (en)
French (fr)
Inventor
邓猛
张奇
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 WO2023116534A1 publication Critical patent/WO2023116534A1/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
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the present application relates to the technical field of wireless communication, and in particular to a method, device and readable storage medium for sending and receiving an access message.
  • a device-to-device (device-to-device, D2D) communication technology refers to a communication method in which two peer user nodes communicate directly. In a network composed of D2D communication users, each user node can send and receive signals. Compared with cellular communication, D2D communication does not need to be relayed by a base station, and two user equipments (user equipment, UE) can directly communicate with each other.
  • 4G 4th generation mobile communication technology
  • D2D communication technology has always attracted much attention, and it is also a research hotspot of the 3rd generation partnership project (3GPP). One of them has been continuously evolving since the release12 version was introduced.
  • Msg1-Msg5 The interaction process between Msg1 and Msg2 is a random access (RA) process, and the interaction process between Msg3-Msg5 is a radio resource control (RRC) establishment (RRC Setup) process.
  • RRC radio resource control
  • the main purpose of random access is to perform uplink synchronization between the UE and the base station.
  • Msg1 is the preamble information, which is used by the base station to determine the UE delay and adjust the timing advance (TA).
  • TA timing advance
  • the main purpose of RRC establishment is to establish a signaling bearer for UE.
  • RRC For the specific random access process and RRC establishment process, please refer to the relevant provisions of the 3GPP standard protocol, which will not be repeated here.
  • the embodiment of the present application provides a method, device, and readable storage medium for sending and receiving access messages, which can send and receive access messages at fixed subframe positions, without requiring the receiving end to monitor/analyze access messages at all subframe positions , thereby reducing the power consumption at the receiving end.
  • the present application provides a method for sending an access message, the method comprising: a first communication device receiving a synchronization signal sent by a second communication device, the synchronization signal carrying a first synchronization offset indication; the first communication device determining a second synchronization offset indication, where the second synchronization offset indication is determined based on the first synchronization offset indication and a preset offset; the first communication device sends an access message at a first subframe position, and the first The subframe position is determined based on the second synchronization offset indication and the sending period of the synchronization signal.
  • the access message is used for uplink synchronization.
  • the second communication device can also receive the access message at a fixed subframe position, without the need for the second communication device to monitor/analyze the access message at all subframe positions. enter the message. Therefore, this solution can save power consumption of the second communication device.
  • the sending location of the access message is fixed, the complexity of the access process can be reduced.
  • the preset offset represents an offset between the sending position of the access message agreed by the second communication device and the first communication device, and the sending position of the synchronization signal.
  • the preset offset represents an offset between the synchronization offset indication of the access message agreed upon by the second communication device and the first communication device, and the synchronization offset indication of the synchronization signal. Therefore, the above-mentioned second synchronization offset indication is:
  • F2 represents the second synchronization offset indication
  • F1 represents the first synchronization offset indication
  • offset represents the preset offset
  • T represents the sending period of the synchronization signal
  • mod represents a remainder operation.
  • the preset offset (offset) may be preset, or stipulated by a protocol, or pre-negotiated, and so on. For example, the default offset is 1.
  • Presetting in this application can be understood as setting, presetting, predefining, storing, prestoring, prenegotiating, preconfiguring, curing, or prefiring.
  • the first communication device and the second communication device agree on the sending location of the access message, which can reduce the signaling transmission overhead for the second communication device to notify the first communication device of the sending location of the access message.
  • the method further includes: if the first communication device does not receive the access message within the first time If the response message of the access message is received, the first communication device resends the access message at the second subframe position.
  • the difference between the position of the second subframe and the position of the first subframe is the sending period of R synchronization signals.
  • the value of R is an integer greater than or equal to 1.
  • R may be a random value within [1, M1], M1 is an integer greater than or equal to 1, and M1 may be 4.
  • the first time may be a preset value, or a value stipulated by a protocol, or a value negotiated between the first communication device and the second communication device, and the like.
  • the power consumption of the first communication device can be reduced, and interference to access messages sent by other communication devices can be reduced.
  • the foregoing first synchronization offset indication is a value in a first synchronization offset indication set.
  • the first set of synchronization offset indications is a set of integers in the second set of synchronization offset indications [0, T) except for the third synchronization offset indication.
  • the third synchronization offset indication is a synchronization offset indication corresponding to a subframe position when the second communication device receives the synchronization signal sent by the third communication device.
  • the third communication device is a communication device other than the second communication device.
  • T is the sending cycle of the synchronization signal, its value is a positive integer, and the unit is millisecond (ms).
  • the synchronization signal sent by the second communication device and the synchronization signal sent by other communication devices can not overlap, thereby reducing the gap between multiple synchronization signals. mutual interference.
  • the foregoing first synchronization offset indication is an integer in the second synchronization offset indication set [0, T).
  • T is the sending period of the synchronization signal.
  • the second set of synchronization offset indications [0, T) is a set of integers, that is, the second set of synchronization offset indications is ⁇ 0, 1, 2, 3, . . . , (T-1) ⁇ .
  • the present application provides a method for receiving an access message.
  • the method includes: a second communication device sends a synchronization signal (by broadcasting); the second communication device determines a second synchronization offset indication, and the second synchronization
  • the offset indication is determined based on the first synchronization offset indication and the preset offset carried in the synchronization signal; the second communication device receives the access message at the first subframe position, and the first subframe position is based on the second
  • the synchronization offset indication and the sending cycle of the synchronization signal are determined.
  • the access message is used for uplink synchronization.
  • the second communication device calculates the timing advance information of the first communication device, and carries the timing advance information in the response message of the access message and sends it to the first communication device .
  • the timing advance For a specific method of calculating the timing advance, reference may be made to the provisions of 3GPP, which will not be repeated here.
  • the above-mentioned second synchronization offset indication is:
  • F2 represents the second synchronization offset indication
  • F1 represents the first synchronization offset indication
  • offset represents the preset offset
  • T represents the sending period of the synchronization signal
  • mod represents a remainder operation.
  • the method further includes: the second communication device receives the access message at the second subframe position message, the difference between the position of the second subframe and the position of the first subframe is the sending period of R synchronization signals.
  • the value of R is an integer greater than or equal to 1.
  • R may be a random value within [1, M1], M1 is an integer greater than or equal to 1, and M1 may be 4.
  • the first time may be a preset value, or a value stipulated by a protocol, or a value negotiated between the first communication device and the second communication device, and the like.
  • the method further includes: the second communication device listens to the synchronization signal sent by other communication devices; if the second communication device detects If the synchronization signal is sent by the third communication device, the second communication device randomly selects a value from the first synchronization offset indication set as the first synchronization offset indication. That is to say, the above-mentioned first synchronization offset indication is a value in the first synchronization offset indication set.
  • the first synchronization offset indication set is a set of integers in the second synchronization offset indication set [0, T) except the third synchronization offset indication.
  • the third synchronization offset indication is a synchronization offset indication corresponding to a subframe position when the second communication device receives the synchronization signal sent by the third communication device.
  • T is the sending cycle of the synchronization signal.
  • the third communication device is a communication device other than the second communication device.
  • the method further includes: the second communication device listens to the synchronization signal sent by other communication devices; if the second communication device does not listen to If any synchronization signal is received, the second communication device randomly selects a value from the second synchronization offset indication set [0, T) as the first synchronization offset indication. That is to say, the above-mentioned first synchronization offset indication is an integer in the second synchronization offset indication set [0, T). T is the sending period of the synchronization signal.
  • the second set of synchronization offset indications [0, T) is a set of integers, that is, the second set of synchronization offset indications is ⁇ 0, 1, 2, 3, . . . , (T-1) ⁇ .
  • the present application provides a first communication device, the first communication device includes a method for sending an access message provided in the first aspect above, or any possible implementation of the first aspect above Therefore, the beneficial effects (or advantages) of the method for sending an access message provided in the first aspect can also be realized.
  • the present application provides a second communication device, where the second communication device includes a method for receiving an access message provided in the second aspect above, or any possible implementation of the second aspect above Therefore, the beneficial effects (or advantages) of the access message receiving method provided in the second aspect can also be realized.
  • the present application provides a communication device, where the communication device is a first communication device or a second communication device.
  • the communication device includes a processor and a transceiver.
  • the communication device further includes a memory.
  • the transceiver is used to send and receive synchronization signals and access messages, and the memory is used to store computer programs, where the computer programs include program instructions, and when the processor executes the program instructions, the communication device executes the first aspect above, or The method for sending an access message described in any possible implementation of the first aspect; or when the processor runs the program instructions, the communication device is made to execute the second aspect above, or any possibility of the second aspect The method for receiving the access message described in the implementation manner.
  • the transceiver may be a radio frequency module in the communication device, or a combination of a radio frequency module and an antenna, or an input and output interface of a chip or a circuit.
  • the present application provides a communication device, which may be implemented in the form of a chip or in the form of equipment, and the communication device includes a processor and an interface circuit.
  • the processor is connected with the communication interface.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the communication interface may be an input-output interface.
  • the processor is configured to run the above-mentioned code instructions to implement the method for sending an access message provided in the above-mentioned first aspect or any possible implementation manner of the above-mentioned first aspect, and can also implement the above-mentioned first aspect or any of the above-mentioned first aspects.
  • the processor is configured to run the above-mentioned code instructions to realize the above-mentioned second aspect or the method for receiving an access message provided in any possible implementation manner of the above-mentioned second aspect, and the above-mentioned second aspect or the above-mentioned second aspect can also be realized Beneficial effects (or advantages) of the method for receiving an access message provided by any possible implementation of the present invention
  • the communication device further includes a memory, and the memory is connected to the processor through a circuit.
  • processor and memory may be physically independent units, or the memory may also be integrated with the processor.
  • the present application provides a readable storage medium, on which program instructions are stored, and when it is run on a computer, the computer can execute any one of the above-mentioned first aspect or the first aspect.
  • the method for sending an access message described in the implementation manner can also achieve the beneficial effects of the method for sending an access message provided in the first aspect; or make the computer execute the second aspect or any possibility of the second aspect
  • the method for receiving an access message described in the implementation manner of the present invention can also achieve the beneficial effects of the method for receiving an access message provided in the second aspect.
  • the present application provides a program product containing instructions.
  • the method for sending an access message described in the above-mentioned first aspect or any possible implementation of the first aspect is executed; or causes The method for receiving the access message described in the second aspect or any possible implementation manner of the second aspect is executed.
  • access messages can be sent and received at fixed subframe positions, without the receiving end monitoring/parsing access messages at all subframe positions, thereby reducing the power consumption of the receiving end.
  • FIG. 1 is a schematic diagram of a network architecture of D2D communication provided by an embodiment of the present application
  • FIG. 2 is a schematic flow chart of a random access process in an LTE system
  • FIG. 3 is a schematic flowchart of a method for sending and receiving an access message provided in an embodiment of the present application
  • Fig. 4 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 5 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 6 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • At least one item (unit) of a, b, or c may represent: a, b, c; a and b; a and c; b and c; or a and b and c.
  • a, b, c can be single or multiple.
  • words such as “exemplary” or “for example” are used to mean an example, illustration or description. Any embodiment or design described in this application as “exemplary”, “for example” or “such as” is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of words such as “exemplary,” “for example,” or “such as” is intended to present related concepts in a specific manner.
  • system and “network” are often used interchangeably herein.
  • a corresponds to B means that there is a corresponding relationship between A and B, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • the technical solution provided by this application can be applied in a wireless communication system.
  • the wireless communication system may comply with the wireless communication standard of the third generation partnership project (3GPP), and may also comply with other wireless communication standards, such as the Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers, IEEE) The 802 series (such as 802.11, 802.15, or 802.20) of wireless communication standards.
  • FIG. 1 is a schematic diagram of a network architecture of D2D communication provided by an embodiment of the present application.
  • the network architecture includes multiple terminal devices (such as terminal device 100, terminal device 200, and terminal device 300), and these multiple terminal devices can be connected through wireless links (such as sidelinks Sidelink). communication.
  • the terminal equipment in this application may also be referred to as terminal, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc., which may be a user-side device for An entity that receives or transmits signals, such as a mobile phone; it can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, and satellites) superior).
  • UEs include handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication capabilities.
  • the UE may be a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiver function.
  • the terminal device can also be a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the device for realizing the function of the terminal may be a terminal; it may also be a device capable of supporting the terminal to realize the function, such as a chip system, or a communication module, or a modem, etc., and the device may be installed in the terminal .
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • the technical solution provided by the present application is described by taking the device for realizing the terminal function as the terminal and taking the terminal as the UE as an example.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.
  • the UE can also be used as a base station.
  • the UE may act as a scheduling entity that provides sidelink signals between UEs in vehicle-to-everything (V2X), D2D, or peer-to-peer (P2P), etc.
  • V2X vehicle-to-everything
  • D2D D2D
  • P2P peer-to-peer
  • Fig. 2 is a schematic flowchart of a random access procedure in an LTE system.
  • the initial random access process of long term evolution (long term evolution, LTE) is contention-based random access.
  • eNodeB evolved Node B
  • SIB 2 system information block 2
  • the UE may randomly select a time-frequency resource from the time-frequency resource notified by SIB 2 to send a random access preamble (random access preamble), that is, Msg1.
  • the main function of the random access preamble or Msg1 is to tell the eNodeB that there is a random access request, and enable the eNodeB to estimate the transmission delay between it and the UE, so that the eNodeB can calibrate the timing advance (TA) and inform the UE.
  • TA timing advance
  • Each cell has 64 available preambles, and the UE can randomly select one of them to transmit on the physical random access channel (PRACH).
  • PRACH physical random access channel
  • the eNodeB can reply a random access response (random access response).
  • the eNodeB needs to analyze the preamble information of the UE at all time domain locations, which will inevitably increase the power consumption of the eNodeB. Then, if the random access process of the cellular system is directly applied to the D2D communication network, the power consumption of the receiving end will also increase.
  • the embodiment of the present application provides a method for sending and receiving access messages, which can send and receive access messages at fixed subframe positions, without requiring the receiving end to monitor/analyze access messages at all subframe positions, thereby reducing the burden on the receiving end. power consumption.
  • the first communication device and the second communication device in this application may be different terminal devices, or chips/circuits in different terminal devices.
  • the first communication device and the second communication device in this application may belong to a D2D network, for example, the first communication device is the terminal device 100 in FIG. 1 mentioned above, and the second communication device is the terminal device 200 in FIG. 1 above.
  • the D2D network can be divided into two types, one is a D2D central network, and the other is a D2D non-central network.
  • a terminal device can be selected as the management device, and the management device provides the synchronization source, that is, periodically broadcasts the synchronization signal; all other terminal devices are used as member devices, and the synchronization signal of the management device is used as the target for synchronization.
  • Discovery processing, and access processing after synchronization is completed.
  • the coverage of the D2D centered network may depend on the coverage of the management device under the maximum transmission signal power.
  • the terminal device 200 is a management device
  • both the terminal device 100 and the terminal device 300 are member devices
  • the terminal device 200 periodically broadcasts a synchronization signal
  • the terminal device 100 and the terminal device 300 use the synchronization signal as a target to perform
  • the access process is performed after the synchronization is completed.
  • the node identities of all terminal devices are equal, and there is no management device; any terminal device can provide a synchronization source.
  • the node identities of terminal device 100, terminal device 200, and terminal device 300 are equal.
  • Any terminal device can broadcast and send synchronization signals, and other terminal devices receive synchronization signals and perform synchronization discovery processing. If other terminal devices If the device wants to access the terminal device, it performs access processing after synchronization is completed.
  • the D2D network may not make a distinction, that is, it does not distinguish whether the D2D network has a central node (or a management device). It should be understood that the present application does not limit the architecture of the D2D network.
  • FIG. 3 is a schematic flowchart of a method for sending and receiving an access message provided by an embodiment of the present application. As shown in Figure 3, the method for sending and receiving the access message includes but is not limited to the following steps:
  • the second communication device sends a synchronization signal.
  • the second communication device may periodically broadcast the synchronization signal.
  • the sending cycle of the synchronization signal is T milliseconds (millisecond, ms), where T is a positive integer.
  • the synchronization signal carries the indication of the first synchronization offset and the position of the subframe (that is, the frame number and the subframe number) at which the synchronization signal is sent.
  • a frame is a cyclically repeated data block composed of a fixed number of time slots, and each time slot is a logical time-division multiplexing (Time-Division multiplexing, TDM) Channels or time division multiple access (TDMA) transmitters.
  • TDM Time-Division multiplexing
  • TDMA time division multiple access
  • the synchronization signal in the embodiment of the present application includes a frame number, a subframe number, and a synchronization offset indicator (syncOffsetIndicator).
  • the content of the synchronization signal includes but not limited to the following information:
  • the bit string (BIT STRING) size of the frame number in the synchronization signal is N; the subframe number is an integer (INTEGER) 0,1,2,...,(N-1); the synchronization offset indication is an integer (INTEGER )0,1,2,3,...,(T-1).
  • N can be 10. It should be understood that for a synchronization signal sent by a certain communication device, the frame number, subframe number, and synchronization offset indication in the synchronization signal are definite values, and the frame number and subframe number in the synchronization signal are used to indicate that the synchronization The subframe position of the signal.
  • the above-mentioned first synchronization offset indicator (for convenience of description, hereinafter referred to as F1) may be a synchronization offset indicator 1 (syncOffsetIndicator1) or a synchronization offset indicator 2 ( syncOffsetIndicator2).
  • syncOffsetIndicator1 and syncOffsetIndicator2 can be written into the second communication device in a pre-configured manner.
  • Each of these two parameters corresponds to a subframe position.
  • the position of the subframe in this embodiment of the present application may be determined by the frame number and the subframe number.
  • the second communication device may send the synchronization signal at a subframe position satisfying the following formula (1-1):
  • frame number is the frame number
  • subframe number is the subframe number
  • F1 represents the first synchronization offset indicator
  • its value is syncOffsetIndicator1 or syncOffsetIndicator2
  • the value range of syncOffsetIndicator is [0, 159].
  • the second communication device Before the second communication device periodically broadcasts the synchronization signal, if the second communication device does not select other communication devices (referring to communication devices other than the second communication device in the D2D network) as the reference source, the second communication device can be used as the reference source Send sync signal. That is to say, the second communication device randomly selects a value from syncOffsetIndicator1 and syncOffsetIndicator2 to determine the subframe position for sending the synchronization signal.
  • the second communication device selects another communication device (referring to a communication device other than the second communication device in the D2D network) as the reference source, the second communication device selects a value different from the syncOffsetIndicator used by the reference source in syncOffsetIndicator1 and syncOffsetIndicator2 , to determine the subframe position where the synchronization signal is sent by itself.
  • the second communication device may send the synchronization signal at the determined subframe position.
  • the first synchronization offset indication (denoted as F1) may be a value in the first synchronization offset indication set.
  • the first synchronization offset indication is an integer in the second synchronization offset indication set [0, T). The second communication device listens/searches for synchronization signals sent by other communication devices before periodically broadcasting synchronization signals.
  • the second communication device may randomly select a value from the first synchronization offset indication set as the first synchronization offset indication. If the second communication device does not detect/search for any synchronization signal, the second communication device may randomly select a value from the second set of synchronization offset indications [0, T) as the first synchronization offset indication.
  • the second communication device may determine the subframe position according to the first synchronization offset indication and the sending period T of the synchronization signal, and send the synchronization signal at the determined subframe position.
  • the first synchronization offset indication set is a set of integers in the second synchronization offset indication set [0, T) except the third synchronization offset indication.
  • the third synchronization offset indication is a synchronization offset indication corresponding to a subframe position when the second communication device receives the synchronization signal 2 sent by the third communication device.
  • T is the transmission period of the synchronization signal, which can be written into the second communication device in a pre-configured manner, and can also be notified to the second communication device in other ways. In the embodiment of the present application, the transmission period of the synchronization signal is known to the second communication device The method of T is not limited.
  • the second set of synchronization offset indications [0, T) is a set of integers, that is, the second set of synchronization offset indications is ⁇ 0, 1, 2, 3, . . . , (T-1) ⁇ .
  • Ind in the above formula (1-2) represents the third synchronization offset indication.
  • FNoffset represents the relative timing offset between the second communication device and the third communication device within one sending cycle (ie T).
  • INDy represents the fourth synchronization offset indication carried in the synchronization signal 2 sent by the third communication device.
  • T represents the transmission period of the synchronization signal.
  • mod represents the remainder operation. That is to say, the above-mentioned first set of synchronization offset indications (denoted as set S) is a set of integers in the second set of synchronization offset indications [0, T) except Ind (that is, the third synchronization offset indication).
  • N in the above formula (1-3) represents the number of subframes included in one frame.
  • FNx and SFNx respectively indicate the frame number and subframe number when the second communication device receives the synchronization signal 2 sent by the third communication device.
  • FNy and SFNy respectively represent the frame number and the subframe number carried in the synchronization signal 2 sent by the third communication device.
  • the first communication device receives a synchronization signal sent by the second communication device.
  • the first communication device determines a second synchronization offset indication, where the second synchronization offset indication is determined based on the first synchronization offset indication and a preset offset carried in the synchronization signal.
  • the first communication device sends an access message at a first subframe position, where the first subframe position is determined based on the second synchronization offset indication and the sending period of the synchronization signal, and the access message is used for uplink synchronization .
  • the first communication device may perform access processing.
  • the first communication device may perform access processing.
  • the first communication device can adjust its own timing to be consistent with the second communication device according to the frame number and subframe number carried in the synchronization signal. .
  • the first communication device may adjust its current frame number to be the same as the frame number carried in the synchronization signal, and adjust its current subframe number to be the same as the frame number carried in the synchronization signal.
  • the carried subframe numbers are the same.
  • the first communication device can determine the second synchronization offset indication according to the first synchronization offset indication (F1) and the preset offset carried in the synchronization signal (for the convenience of description, the second synchronization offset indication will be denoted as F2).
  • the first communication device may determine the first subframe position according to the second synchronization offset indication (F2) and the sending period of the synchronization signal, and send the access message at the first subframe position.
  • the access message is used for uplink synchronization.
  • the access message may be message 1 (message 1, Msg1 for short).
  • the first communication device may send Msg1 to the second communication device at a subframe position (ie frame number and subframe number) satisfying the following formula (1-4):
  • N represents the number of subframes included in one frame.
  • the frame number is the frame number
  • the subframe number is the subframe number.
  • mod represents the remainder operation.
  • F2 represents the above-mentioned second synchronization offset indication
  • T represents the sending period of the synchronization signal.
  • the aforementioned preset offset may be preset, or stipulated by a protocol, or pre-negotiated, and so on.
  • Presetting in this application can be understood as setting, presetting, predefining, storing, prestoring, prenegotiating, preconfiguring, curing, or prefiring.
  • the preset offset may represent an offset between the sending position of the access message agreed by the second communication device and the first communication device, and the sending position of the synchronization signal.
  • the preset offset may represent an offset between the synchronization offset indication of the access message agreed upon by the second communication device and the first communication device, and the synchronization offset indication of the synchronization signal. Therefore, the second synchronization offset indication (F2) is:
  • F2 represents the second synchronization offset indication
  • F1 represents the first synchronization offset indication
  • offset represents the preset offset
  • T represents the sending cycle of the synchronization signal
  • synchronization offset indicator (syncOffsetIndicator) mentioned in the embodiment of the present application may also be called a synchronization indicator or an indicator (Indicator), etc., and the embodiment of the present application does not limit its name.
  • the second communication device can also receive the access message at a fixed subframe position, without requiring the second communication device to transmit the access message at a fixed subframe position. Monitoring/parsing the access message at the location can save the power consumption of the second communication device. In addition, because the sending location of the access message is fixed, the complexity of the access process can be reduced.
  • the second communication device determines a second synchronization offset indication, where the second synchronization offset indication is determined based on the first synchronization offset indication and a preset offset carried in the synchronization signal.
  • the second communication apparatus receives the access message at a first subframe position, where the first subframe position is determined based on the second synchronization offset indication and the sending period of the synchronization signal.
  • the second communication device may determine the second synchronization offset indication (F2) according to the first synchronization offset indication (F1) and the preset offset. It should be understood that the manner in which the second communication device determines the second synchronization offset indication is the same as the manner in which the first communication device determines the second synchronization offset indication, and reference may be made to relevant descriptions above, and details are not repeated here.
  • the second communication device may determine the first subframe position according to the second synchronization offset indication (F2) and the sending period of the synchronization signal, and receive the access message at the first subframe position.
  • the manner in which the second communication device determines the position of the first subframe is the same as the manner in which the first communication device determines the position of the first subframe, and reference may be made to relevant descriptions above, which will not be repeated here.
  • the second communication device After the second communication device receives the access message, it can calculate the timing advance (TA) information of the first communication device, and can carry the timing advance (TA) information in the response message of the access message and send it to first communication device.
  • TA Timing Advance
  • the access message is Msg1
  • the response message of the access message is Msg2.
  • the second communication device and the first communication device agree on the sending location of the access message, which can reduce the signaling transmission overhead for the second communication device to notify the first communication device of the sending location of the access message.
  • step S105 is executed before step S102-step S104, or step S105 is executed after step S102-step S104, or step S105 is executed simultaneously/parallel with step S102-step S104.
  • the method for sending and receiving the access message further includes: if the first communication device does not receive the response message of the access message within the first time (for ease of description, denoted as T1), Then the first communication device may resend the access message (such as Msg1) at the second subframe position.
  • the difference between the position of the second subframe and the position of the first subframe is the sending period of R synchronization signals.
  • the value of R is an integer greater than or equal to 1.
  • R may be a random value within [1, M1]
  • M1 is an integer greater than or equal to 1
  • M1 may be 4.
  • the first communication device may adopt a random back-off method to resend the access message.
  • the first time T1 may be a preset value, or a value stipulated by a protocol, or a value negotiated between the first communication device and the second communication device, and the like.
  • the first time T1 may be greater than the sending period T of the synchronization signal.
  • R is equal to 3
  • T1 is equal to 1s, assuming that the subframe in which the first communication device sends Msg1 for the first time is the first subframe satisfying the above formula (1-4); if the first communication device sends Msg1 within 1s If no Msg2 feedback is received, the first communication device may resend Msg1 on the third subframe that satisfies the above formula (1-4). It can be seen from the above formula (1-4) that within one transmission period T, only one subframe satisfies the above formula (1-4), so the position of the subframe where the first communication device sends Msg1 for the first time and the position of the retransmitted Msg1 The subframe positions differ by R transmission periods.
  • the first communication device may continue to perform random The fallback method is to resend the access message until the first communication device receives the response message feedback; or the response message of the access message (such as Msg2) is not received until the first communication device tries N1 times of access Until now, the access fails at this time, and the first communication device stops sending the access message.
  • N1 is a positive integer.
  • N1 may be a preset value, or a value stipulated by a protocol, or a value negotiated between the first communication device and the second communication device, and the like.
  • the first communication device does not receive the response message of the access message within the first time (T1), it is determined that the first communication device fails to access the second communication device, and the first communication device stops sending and receiving. enter the message.
  • the second communication device broadcasts the first synchronization offset indication (which is carried in the synchronization signal), and agrees with the first communication device on the second synchronization offset indication (equal to the first synchronization offset indication and the preset Sending the access message at the subframe position corresponding to the sum of the offsets) can reduce the signaling transmission overhead for the second communication device to notify the first communication device of the sending position of the access message.
  • the first communication device After receiving the synchronization signal, the first communication device sends an access message at the subframe position corresponding to the second synchronization offset indication; the second communication device receives the access message at the subframe position corresponding to the second synchronization offset indication; Access messages can be sent and received at fixed subframe positions, without the receiving end monitoring/parsing access messages at all subframe positions, reducing the power consumption of the receiving end. In addition, because the sending location of the access message is fixed, the complexity of the access process can be reduced.
  • the second communication device periodically broadcasts a synchronization signal; after the first communication device receives the synchronization signal, if the first communication device determines that the second communication device is currently in the receiving state/awake state/connected state/not In the energy-saving state, the first communication device may send the access message at any subframe position.
  • the second telecommunications device can monitor/parse access messages at all subframe positions.
  • the first communication device determines a second synchronization offset indication and sends an access message at the first subframe position, where the second synchronization offset indication is based on the first synchronization information carried in the synchronization signal
  • the offset indication and the preset offset are determined, and the first subframe position is determined based on the second synchronization offset indication and the sending period of the synchronization signal.
  • the second communication device monitors/parses the access message at the first subframe position.
  • the access message may be used for uplink synchronization.
  • the second communication device may always be in the receiving state/awake state/connection state/non-energy-saving state, or the second communication device may wake up periodically. It should be understood that the receiving state/awake state/connected state/non-energy-saving state here can be understood as a state capable of monitoring/parsing access messages at all subframe positions.
  • the first communication device when the second communication device is continuously in the receiving state, the first communication device can send the Msg1 at any subframe position.
  • the first communication device can send Msg1 at any subframe position during the wake-up period of the second communication device; or The first communication device sends Msg1 at the subframe position corresponding to the second synchronization offset indication.
  • An embodiment of the present application provides a method for accessing a D2D network, which can lay a foundation for communication between UEs.
  • the above content elaborates the method of the present application in detail.
  • the embodiments of the present application also provide corresponding devices or equipment.
  • the embodiment of the present application can divide the functional modules of the first communication device and the second communication device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
  • the communication device according to the embodiment of the present application will be described in detail below with reference to FIG. 4 to FIG. 6 .
  • FIG. 4 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device includes: a transceiver unit 11 and a processing unit 12 .
  • the communication device may be the first communication device or a chip or a circuit that may be provided in the first communication device. That is, the communication device may be used to execute the steps or functions performed by the first communication device in the above method embodiments.
  • the transceiver unit 11 is configured to receive a synchronization signal sent by the second communication device; the processing unit 12 is configured to indicate a second synchronization offset, and the second synchronization offset indication is based on the first synchronization offset carried in the synchronization signal indication and preset offset determination; the transceiver unit 11 is also configured to send an access message at a first subframe position, where the first subframe position is based on the second synchronization offset indication and the transmission cycle of the synchronization signal It is determined that the access message is used for uplink synchronization.
  • the above-mentioned second synchronization offset indication is:
  • F2 represents the second synchronization offset indication
  • F1 represents the first synchronization offset indication
  • offset represents the preset offset
  • T represents the sending period of the synchronization signal
  • mod represents a remainder operation.
  • the above-mentioned transceiver unit 11 is further configured to: if the response message of the access message is not received within the first time, resend the access message at the second subframe position, the second subframe position
  • the difference from the position of the first subframe is R sending periods of the synchronization signal, and the value of R is an integer greater than or equal to 1.
  • the above-mentioned first synchronization offset indication is a value in the first synchronization offset indication set
  • the first synchronization offset indication set is the value in the second synchronization offset indication set [0, T) except the third synchronization offset
  • the third synchronization offset indication is the synchronization offset indication corresponding to the subframe position when the second communication device receives the synchronization signal sent by the third communication device
  • the third communication device is For communication devices other than the second communication device
  • the T is the sending period of the synchronization signal.
  • the above-mentioned first synchronization offset indication is an integer in the second synchronization offset indication set [0, T), where T is the sending period of the synchronization signal.
  • the communication device can correspondingly execute the aforementioned method embodiments, and the above-mentioned operations or functions of each unit in the communication device are to realize the corresponding operations of the first communication device in the aforementioned method embodiments, and its technical effects can be found in the aforementioned method implementation For the sake of brevity, the technical effects in the examples are not repeated here.
  • the communication device may be a second communication device or a chip or a circuit that may be provided in the second communication device. That is, the communication device can be used to perform the steps or functions performed by the second communication device in the above method embodiments.
  • the transceiver unit 11 is configured to send a synchronization signal; the processing unit 12 is configured to determine a second synchronization offset indication, and the second synchronization offset indication is based on the first synchronization offset indication and the preset offset carried in the synchronization signal. Offset determination; the transceiver unit 11 is further configured to receive an access message at a first subframe position, the first subframe position is determined based on the second synchronization offset indication and the transmission cycle of the synchronization signal, and the access Messages are used for uplink synchronization.
  • the above-mentioned second synchronization offset indication is:
  • F2 represents the second synchronization offset indication
  • F1 represents the first synchronization offset indication
  • offset represents the preset offset
  • T represents the sending period of the synchronization signal
  • mod represents a remainder operation.
  • the transceiver unit 11 is further configured to: receive an access message at a second subframe position, where the difference between the second subframe position and the first subframe position is R sending periods of the synchronization signal, and the The value of R is an integer greater than or equal to 1.
  • the above-mentioned first synchronization offset indication is a value in the first synchronization offset indication set
  • the first synchronization offset indication set is the value in the second synchronization offset indication set [0, T) except the third synchronization offset
  • the third synchronization offset indication is the synchronization offset indication corresponding to the subframe position when the second communication device receives the synchronization signal sent by the third communication device
  • the third communication device is For communication devices other than the second communication device
  • the T is the sending period of the synchronization signal.
  • the above-mentioned first synchronization offset indication is an integer in the second synchronization offset indication set [0, T), where T is the sending period of the synchronization signal.
  • the above-mentioned communication device shown in FIG. 4 may be a chip or a circuit provided in the first communication device or the second communication device.
  • FIG. 5 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device exists in the form of a chip, and can be used to implement the method described by the first communication device or the second communication device in the above method embodiment, and reference may be made to the description in the above method embodiment.
  • the communication device may include a processor 501 and one or more interface circuits 502 coupled to the processor 501 .
  • the processor 501 can be used to read and execute computer readable instructions.
  • the processor 501 may mainly include a controller, an arithmetic unit, a register, and the like.
  • the controller is mainly responsible for decoding instructions and sending control signals for operations corresponding to the instructions.
  • the arithmetic unit is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logic operations, and can also perform address operations and conversions.
  • the register is mainly responsible for saving the register operands and intermediate operation results temporarily stored during the execution of the instruction.
  • the hardware architecture of the processor 501 may be an application specific integrated circuit (application specific integrated circuits, ASIC) architecture, a microprocessor without interlocked pipeline stage architecture (microprocessor without interlocked piped stages architecture, MIPS) architecture, an advanced simplified Instruction set machine (advanced RISC machines, ARM) architecture or NP architecture, etc.
  • ASIC application specific integrated circuits
  • MIPS microprocessor without interlocked pipeline stage architecture
  • ARM advanced simplified Instruction set machine
  • NP architecture NP architecture
  • Processor 501 may be single-core or multi-core.
  • the interface circuit 502 can be used to input the synchronization signal to be processed to the processor 501, and can output the processing result of the processor 501 to the outside.
  • the interface circuit 502 may be a general purpose input output (GPIO) interface, which may be connected to multiple peripheral devices (such as wireless communication modules, sensor modules, etc.).
  • the interface circuit 502 is connected to the processor 501 through the bus 503 .
  • the processor 501 may be configured to call the code of the method for sending an access message implemented by the above method embodiment from the memory, so that the communication device can implement each step of the method for sending an access message.
  • the memory can be integrated with the processor 501, or can be coupled with the chip through the interface circuit 502, that is to say, the memory can be part of the chip, or independent of the chip.
  • the interface circuit 502 can be used to output the execution result of the processor 501 .
  • the interface circuit 502 may be specifically configured to output an access message or a synchronization signal generated by the processor 501 .
  • processor 501 and the interface circuit 502 can be realized by hardware design, software design, or a combination of software and hardware, which is not limited here.
  • the communication device shown in FIG. 4 above may be a complete device, that is, the first communication device or the second communication device.
  • FIG. 6 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device may be used to implement the method described by the first communication device or the second communication device in the above method embodiment, and reference may be made to the description in the above method embodiment.
  • the communication device may include one or more processors 1001 and a transceiver unit 1005 .
  • the processor 1001 may be a general purpose processor or a special purpose processor or the like.
  • it may be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processing unit can be used to control devices (such as UE or chips, etc.), execute software programs, and process data of software programs.
  • the transceiver unit 1005 is configured to implement signal input (reception) and output (transmission).
  • the communication device may be a chip, and the transceiver unit may be an input and/or output circuit of the chip, or a communication interface.
  • the chip can be used in terminal equipment (such as UE).
  • the communication device may be a terminal device (such as a UE), and the transceiver unit may be a transceiver, a radio frequency chip, and the like.
  • the one or more processors 1001 may implement the methods in the foregoing method embodiments.
  • processor 1001 may also implement other functions in addition to implementing the methods in the foregoing embodiments.
  • the processor 1001 may also include an instruction 1003, and the instruction may be executed on the processor, so that the communication device executes the methods described in the foregoing method embodiments.
  • the communication device may also include a circuit, and the circuit may implement the functions in the foregoing method embodiments.
  • the communication device may include one or more memories 1002, on which instructions 1004 are stored, and the instructions can be executed on the processor, so that the communication device executes the method described in the above-mentioned embodiment.
  • data may also be stored in the memory.
  • Instructions and/or data may also be stored in the optional processor.
  • the one or more memories 1002 may store the preset offset value and/or the sending cycle of the synchronization signal described in the above embodiments, or other information involved in the above embodiments.
  • the processor and memory can be set separately or integrated together.
  • the communication device may further include a transceiver unit 1005 and an antenna 1006, or include a communication interface.
  • the transceiver unit 1005 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to realize the transceiver function of the communication device through the antenna 1006 .
  • the communication interface (not shown in the figure) can be used for communication between terminal devices.
  • the communication interface may be an interface for wired communication, such as an interface for optical fiber communication.
  • the processor 1001 may be referred to as a processing unit, and controls a communication device (such as a UE).
  • a communication device such as a UE
  • the processor in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory Access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct memory bus random access memory direct rambus RAM, DR RAM
  • the above-mentioned embodiments may be implemented in whole or in part by software, hardware (such as circuits), firmware, or other arbitrary combinations.
  • the above-described embodiments may be implemented in whole or in part in the form of computer program products.
  • the computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center through wired, such as optical fiber, or wireless, such as infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media.
  • the semiconductor medium may be a solid state drive.
  • the embodiment of the present application also provides a computer program product, the computer program product includes computer program code, when the computer program code is run on the computer, the computer is made to execute the first communication device or the second communication device in the foregoing method embodiments The method steps described.
  • the embodiment of the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium stores program instructions. The method steps described by the communication device.
  • the embodiment of the present application also provides a device, and the device may be a chip.
  • the chip includes a processor.
  • the processor is configured to read and execute the computer program stored in the memory, so as to execute the methods in any possible implementation manners of the aforementioned method embodiments.
  • the chip further includes a memory, and the memory is connected to the processor through a circuit or wires.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or signals to be processed, and the processor obtains the data and/or signals from the communication interface, processes the data and/or signals, and outputs processing results through the communication interface.
  • the communication interface may be an input-output interface.
  • processor and memory may be physically independent units, or the memory may also be integrated with the processor.
  • a communication system in another embodiment, includes a first communication device and a second communication device, and the first communication device and the second communication device can execute the methods in the foregoing method embodiments.
  • the processes can be completed by computer programs to instruct related hardware.
  • the programs can be stored in computer-readable storage media.
  • When the programs are executed may include the processes of the foregoing method embodiments.
  • the aforementioned storage medium includes: ROM or random access memory RAM, magnetic disk or optical disk, and other various media that can store program codes.

Landscapes

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

Abstract

本申请实施例提供一种接入消息的发送和接收方法、装置及可读存储介质，应用于D2D通信场景中，该方法包括：UE2广播同步信号，该同步信号中携带第一同步偏移指示；UE1接收该同步信号，并确定第二同步偏移指示；UE1在第一子帧位置上发送接入消息；第二同步偏移指示基于该第一同步偏移指示和预设偏移量确定，第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定；相应的，UE2在第一子帧位置上接收接入消息。采用本申请实施例，可以在固定的子帧位置收发接入消息，无需接收端在所有子帧位置上去监听/解析接入消息，从而降低接收端的功耗。

Description

接入消息的发送和接收方法、装置及可读存储介质
本申请要求于2021年12月23日提交中国专利局、申请号为202111594670.7、申请名称为“接入消息的发送和接收方法、装置及可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种接入消息的发送和接收方法、装置及可读存储介质。
背景技术
设备到设备(device-to-device，D2D)通信技术是指两个对等的用户节点之间直接进行通信的一种通信方式。在由D2D通信用户组成的网络中，每个用户节点都能发送和接收信号。相比于蜂窝通信，D2D通信不需要经过基站中转，两个用户设备(user equipment，UE)之间可以直接进行通信。D2D通信技术作为第四代移动通信技术(the 4th generation mobile communication technology，4G)的关键技术之一，一直备受关注，也是第三代合作伙伴计划(the 3rd generation partnership project，3GPP)的研究热点之一，从Release12版本引入后不断演进。
在蜂窝系统中，两个用户设备(user equipment，UE)进行通信之前需要先和网络设备(如基站)建立无线连接。UE和基站之间建立连接通常需要经过Msg1-Msg5的消息交互。其中Msg1和Msg2的交互过程为随机接入(random access，RA)过程，Msg3-Msg5的交互过程为无线资源控制(radio resource control，RRC)建立(RRC Setup)过程。随机接入的主要目的是UE和基站进行上行同步，Msg1即为前导(preamble)信息，用于基站确定UE时延，进行时间提前量(timing advance，TA)调整等。RRC建立的主要目的是为UE建立一条信令承载。具体的随机接入过程和RRC建立过程可参见3GPP标准协议的相关规定，这里不赘述。
与蜂窝系统同理，D2D通信网络中两个UE在通信之前也需要建立无线连接。因此，D2D通信网络中一个UE如何接入另一个UE是值得考虑的问题。
发明内容
本申请实施例提供一种接入消息的发送和接收方法、装置及可读存储介质，可以在固定的子帧位置收发接入消息，无需接收端在所有子帧位置上去监听/解析接入消息，从而降低接收端的功耗。
下面从不同的方面介绍本申请，应理解的是，下面的不同方面的实施方式和有益效果可以互相参考。
第一方面，本申请提供一种接入消息的发送方法，该方法包括：第一通信装置接收第二通信装置发送的同步信号，该同步信号中携带第一同步偏移指示；第一通信装置确定第二同步偏移指示，该第二同步偏移指示基于该第一同步偏移指示和预设偏移量确定；第一通信装置在第一子帧位置上发送接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定。该接入消息用于进行上行同步。
因为第一通信装置在固定的子帧位置发送接入消息，所以第二通信装置也可以在固定的子帧位置接收该接入消息，无需第二通信装置在所有子帧位置上去监听/解析接入消息。因此， 本方案可以节省第二通信装置的功耗。另外，因为接入消息的发送位置固定，可以降低接入流程的复杂性。
结合第一方面，在一种可能的实施方式中，上述预设偏移量表示第二通信装置与第一通信装置约定的接入消息的发送位置、与同步信号发送位置的偏移量。或者，该预设偏移量表示第二通信装置与第一通信装置约定的接入消息的同步偏移指示、与同步信号的同步偏移指示之间的偏移量。因此，上述第二同步偏移指示为：
F2＝(F1+offset)mod T；
其中，F2表示该第二同步偏移指示，F1表示该第一同步偏移指示，offset表示该预设偏移量，T表示该同步信号的发送周期，mod表示求余运算。该预设偏移量(offset)可以是预先设置的，或协议规定的，或预先协商的，等等。举例来说，预设偏移量为1。
本申请中的预设可以理解为设置、预先设置、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
本方案中第一通信装置和第二通信装置约定接入消息的发送位置，可以减少第二通信装置通知第一通信装置接入消息的发送位置的信令传输开销。
结合第一方面，在一种可能的实施方式中，第一通信装置在第一子帧位置上发送接入消息之后，该方法还包括：如果第一通信装置在第一时间内未接收到该接入消息的响应消息，则第一通信装置在第二子帧位置上重发接入消息。该第二子帧位置与上述第一子帧位置之差为R个同步信号的发送周期。R的取值为大于或等于1的整数。举例来说，R可以为[1,M1]内的随机值，M1为大于或等于1的整数，M1可以为4。其中，第一时间可以为预设值、或协议规定的值、或第一通信装置与第二通信装置协商的值等。
这样，可以减少第一通信装置的功耗，减少对其他通信装置发送的接入消息的干扰。
结合第一方面，在一种可能的实施方式中，上述第一同步偏移指示为第一同步偏移指示集合中的值。该第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合。该第三同步偏移指示为第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示。第三通信装置为除第二通信装置外的通信装置。T为同步信号的发送周期，其值为正整数，单位为毫秒(ms)。
本方案通过设置发送同步信号的子帧位置(即第一同步偏移指示)，可以使第二通信装置发送的同步信号与其他通信装置发送的同步信号不重叠，从而减少多个同步信号之间的相互干扰。
结合第一方面，在一种可能的实施方式中，上述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数。T为同步信号的发送周期。该第二同步偏移指示集合[0,T)为整数集合，即该第二同步偏移指示集合为{0,1,2,3,...,(T-1)}。
第二方面，本申请提供一种接入消息的接收方法，该方法包括：第二通信装置(以广播的方式)发送同步信号；第二通信装置确定第二同步偏移指示，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定；第二通信装置在第一子帧位置上接收接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定。该接入消息用于进行上行同步。
可选的，第二通信装置接收到该接入消息后，计算第一通信装置的时间提前量信息，并将该时间提前量信息携带在该接入消息的响应消息中发送给第一通信装置。具体计算时间提前量的方式可参考3GPP的规定，这里不赘述。
结合第二方面，在一种可能的实施方式中，上述第二同步偏移指示为：
F2＝(F1+offset)mod T；
其中，F2表示该第二同步偏移指示，F1表示该第一同步偏移指示，offset表示该预设偏移量，T表示该同步信号的发送周期，mod表示求余运算。
结合第二方面，在一种可能的实施方式中，第二通信装置在第一子帧位置上接收接入消息之后，该方法还包括：第二通信装置在第二子帧位置上接收接入消息，该第二子帧位置与上述第一子帧位置之差为R个同步信号的发送周期。R的取值为大于或等于1的整数。举例来说，R可以为[1,M1]内的随机值，M1为大于或等于1的整数，M1可以为4。其中，第一时间可以为预设值、或协议规定的值、或第一通信装置与第二通信装置协商的值等。
结合第二方面，在一种可能的实施方式中，第二通信装置发送同步信号之前，该方法还包括：第二通信装置侦听其他通信装置发送的同步信号；如果第二通信装置侦听到第三通信装置发送的同步信号，则第二通信装置从第一同步偏移指示集合中随机选择一个值作为第一同步偏移指示。也就是说，上述第一同步偏移指示为第一同步偏移指示集合中的值。其中，该第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合。该第三同步偏移指示为第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示。T为该同步信号的发送周期。第三通信装置为除第二通信装置外的通信装置。
结合第二方面，在一种可能的实施方式中，第二通信装置发送同步信号之前，该方法还包括：第二通信装置侦听其他通信装置发送的同步信号；如果第二通信装置未侦听到任一同步信号，则第二通信装置从第二同步偏移指示集合[0,T)中随机选择一个值作为第一同步偏移指示。也就是说，上述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数。T为同步信号的发送周期。该第二同步偏移指示集合[0,T)为整数集合，即该第二同步偏移指示集合为{0,1,2,3,...,(T-1)}。
第三方面，本申请提供一种第一通信装置，该第一通信装置包括用于执行上述第一方面、或上述第一方面的任意一种可能的实现方式所提供的接入消息的发送方法的单元和/或模块，因此也能实现第一方面提供的接入消息的发送方法所具备的有益效果(或优点)。
第四方面，本申请提供一种第二通信装置，该第二通信装置包括用于执行上述第二方面、或上述第二方面的任意一种可能的实现方式所提供的接入消息的接收方法的单元和/或模块，因此也能实现第二方面提供的接入消息的接收方法所具备的有益效果(或优点)。
第五方面，本申请提供一种通信装置，该通信装置为第一通信装置或第二通信装置。该通信装置包括处理器和收发器。可选的，该通信装置还包括存储器。其中，该收发器用于收发同步信号和接入消息，该存储器用于存储计算机程序，该计算机程序包括程序指令，当该处理器运行该程序指令时，使得该通信装置执行上述第一方面、或第一方面的任意一种可能的实现方式描述的接入消息的发送方法；或者当该处理器运行该程序指令时，使得该通信装置执行上述第二方面、或第二方面的任意一种可能的实现方式描述的接入消息的接收方法。其中，收发器可以为通信装置中的射频模块，或，射频模块和天线的组合，或，芯片或电路的输入输出接口。
第六方面，本申请提供一种通信装置，该通信装置可以以芯片的形式实现，也可以为设备的形式，该通信装置包括处理器和接口电路。该处理器与该通信接口连接。该接口电路用于接收代码指令并传输至该处理器。该通信接口可以是输入输出接口。该处理器用于运行上述代码指令以实现上述第一方面或上述第一方面的任一可能的实施方式所提供的接入消息的发送方法，也能实现上述第一方面或者上述第一方面的任一可能的实施方式提供的接入消息 的发送方法所具备的有益效果(或者优点)。或者，该处理器用于运行上述代码指令以实现上述第二方面或上述第二方面的任一可能的实施方式所提供的接入消息的接收方法，也能实现上述第二方面或者上述第二方面的任一可能的实施方式提供的接入消息的接收方法所具备的有益效果(或者优点)可选的，该通信装置还包括存储器，该存储器与该处理器通过电路连接。
可选的，上述的处理器与存储器可以是物理上相互独立的单元，或者，存储器也可以和处理器集成在一起。
第七方面，本申请提供一种可读存储介质，该可读存储介质上存储有程序指令，当其在计算机上运行时，使得计算机执行上述第一方面、或第一方面的任意一种可能的实现方式描述的接入消息的发送方法，也能实现第一方面提供的接入消息的发送方法所具备的有益效果；或者使得计算机执行上述第二方面、或第二方面的任意一种可能的实现方式描述的接入消息的接收方法，也能实现第二方面提供的接入消息的接收方法所具备的有益效果。
第八方面，本申请提供一种包含指令的程序产品，当其运行时，使得上述第一方面或第一方面的任意一种可能的实现方式描述的接入消息的发送方法被执行；或者使得上述第二方面或第二方面的任意一种可能的实现方式描述的接入消息的接收方法被执行。
实施本申请实施例，可以在固定的子帧位置收发接入消息，无需接收端在所有子帧位置上去监听/解析接入消息，从而降低接收端的功耗。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍。
图1是本申请实施例提供的D2D通信的网络架构示意图；
图2是LTE系统中随机接入过程的示意流程图；
图3是本申请实施例提供的接入消息的发送和接收方法的示意流程图；
图4是本申请实施例提供的通信装置的一结构示意图；
图5是本申请实施例提供的通信装置的另一结构示意图；
图6是本申请实施例提供的通信装置的又一结构示意图。
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清楚、完整地描述。
在本申请的描述中，除非另有说明，“/”表示“或”的意思，例如，A/B可以表示A或B。本文中的“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。此外，“至少一个”是指一个或多个，“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c；a和b；a和c；b和c；或a和b和c。其中a，b，c可以是单个，也可以是多个。
在本申请的描述中，“第一”、“第二”等字样仅用于区别不同对象，并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。此外，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备等，没有限定于已列出的步骤或单元，而是可选地还包括没有 列出的步骤或单元等，或可选地还包括对于这些过程、方法、产品或设备等固有的其它步骤或单元。
本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”、“举例来说”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”、“举例来说”或者“例如”等词旨在以具体方式呈现相关概念。
应理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下装置会做出相应的处理，并非是限定时间，且也不要求装置实现时一定要有判断的动作，也不意味着存在其它限定。
本申请中对于使用单数表示的元素旨在用于表示“一个或多个”，而并非表示“一个且仅一个”，除非有特别说明。
另外，本文中术语“系统”和“网络”常被互换使用。
可以理解，在本申请各实施例中，“A对应的B”表示A与B存在对应关系，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
下面简要介绍本申请的网络架构。应理解的，本申请描述的网络架构是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定。
本申请提供的技术方案可以应用于无线通信系统中。该无线通信系统可以遵从第三代合作伙伴计划(the third generation partnership project，3GPP)的无线通信标准，也可以遵从其他无线通信标准，例如电气电子工程师学会(Institute of Electrical and Electronics Engineers，IEEE)的802系列(如802.11，802.15，或者802.20)的无线通信标准。
举例来说，本申请提供的技术方案应用于D2D通信的场景中。参见图1，图1是本申请实施例提供的D2D通信的网络架构示意图。如图1所示，该网络架构包括多个终端设备(如终端设备100，终端设备200，终端设备300)，这多个终端设备之间可以通过无线链路(比如侧行链路Sidelink)进行通信。
本申请中的终端设备还可以称为终端、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，其可以是用户侧的一种用于接收或发射信号的实体，如手机；其可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计算设备。示例性地，UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请实施例中，用于实现终端的功能的装置可以是终端；也可以是能够支持终端实现该功能的装置，例如芯片系统、或通信模块、或调制解调器等，该装置可以被安装在终端中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请提供的技术方案中，以用于实现终端的功能的装置是终端，以终端是UE为例，描述本申请提供的技术方案。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
可选的，UE也可以用于充当基站。例如，UE可以充当调度实体，其在车辆外联 (vehicle-to-everything，V2X)、D2D或点对点(peer to peer，P2P)等中的UE之间提供侧行链路信号。
为更好地理解本申请提供的技术方案，下面对蜂窝系统中的随机接入过程进行简要介绍。
举例来说，参见图2，图2是LTE系统中随机接入过程的示意流程图。其中，长期演进(long term evolution，LTE)的初始随机接入过程是基于竞争的随机接入。如图2所示，eNodeB(evolved Node B)通过系统消息块2(system information block 2，SIB 2)告知所有的UE允许在哪些时频资源上传输前导(preamble)码。UE可在SIB 2告知的时频资源上随机选择一个时频资源发送随机接入前导(random access preamble)，即Msg1。随机接入前导或Msg1的主要作用是告诉eNodeB有一个随机接入请求，并使得eNodeB能估计其与UE之间的传输延迟，以便eNodeB校准时间提前量(timing advance，TA)并告知UE。每个小区有64个可用的preamble序文，UE可随机选择其中一个在物理随机接入信道(physical random access channel，PRACH)上传输。eNodeB接收到随机接入前导后，可以回复一个随机接入响应(random access response)。
由上述LTE的随机接入过程可知，因为UE随机选择接入的时域位置，导致eNodeB需要在所有时域位置去解析UE的preamble信息，所以势必造成eNodeB的功耗增加。那么，如果直接将蜂窝系统的随机接入过程应用于D2D通信网络，接收端的功耗也会增大。
因此，本申请实施例提供一种接入消息的发送和接收方法，可以在固定的子帧位置收发接入消息，无需接收端在所有子帧位置上去监听/解析接入消息，从而降低接收端的功耗。
本申请中，除特殊说明外，各个实施例或实现方式之间相同或相似的部分可以互相参考。在本申请中各个实施例、以及各实施例中的各个实施方式/实施方法/实现方法中，如果没有特殊说明以及逻辑冲突，不同的实施例之间、以及各实施例中的各个实施方式/实施方法/实现方法之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例、以及各实施例中的各个实施方式/实施方法/实现方法中的技术特征根据其内在的逻辑关系可以组合形成新的实施例、实施方式、实施方法、或实现方法。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
可选的，本申请中的第一通信装置和第二通信装置可以为不同的终端设备，或不同终端设备中的芯片/电路。本申请中的第一通信装置和第二通信装置可以属于一个D2D网络，比如第一通信装置为前述图1中的终端设备100，第二通信装置为前述图1中的终端设备200。
示例性的，D2D网络可以分为2种，一种是D2D有中心网络，另一种是D2D无中心网络。其中，在D2D有中心网络中，可以选定一个终端设备作为管理设备，管理设备提供同步源，即周期性广播同步信号；其他所有终端设备作为成员设备，以管理设备的同步信号为目标做同步发现处理，完成同步后执行接入处理。D2D有中心网络的覆盖范围可以取决于管理设备在最大发送信号功率下可以覆盖的范围。以前述图1为例，假设终端设备200为管理设备，终端设备100和终端设备300均为成员设备，终端设备200周期性广播同步信号，终端设备100和终端设备300以该同步信号为目标做同步发现处理，如果终端设备100和终端设备300均想接入终端设备200，则在完成同步后执行接入处理。而D2D无中心网络中，所有终端设备的节点身份对等，无管理设备；任一终端设备均可提供同步源。以前述图1为例，终端设备100、终端设备200以及终端设备300的节点身份对等，任一终端设备均可广播发送同步信号，其他终端设备接收同步信号并做同步发现处理，如果其他终端设备想要接入该 终端设备，则在完成同步后执行接入处理。当然，D2D网络也可以不做区分，即不区分D2D网络是否有中心节点(或管理设备)。应理解，本申请不限制D2D网络的架构。
下面对本申请实施例提供的接入消息的发送和接收方法进行详细说明。
参见图3，图3是本申请实施例提供的接入消息的发送和接收方法的示意流程图。如图3所示，该接入消息的发送和接收方法包括但不限于以下步骤：
S101，第二通信装置发送同步信号。
可选的，第二通信装置可以周期性广播同步信号。同步信号的发送周期为T毫秒(millisecond，ms)，T为正整数。该同步信号中携带第一同步偏移指示和发送该同步信号的子帧位置(即帧号和子帧号)。
应理解，在通信系统中，帧(frame)是由一个固定数目的时间槽组成的循环重复的数据块，每个时间槽都是一个逻辑的时分多路复用(Time-Division multiplexing，TDM)频道或者是时分多址(time division multiple access，TDMA)传送器。示例性的，为便于描述，本申请实施例定义一个帧(frame)包含N个子帧(subframe)，一个子帧的长度(这里指时间长度)为1ms。
本申请实施例中的同步信号包含帧号(frame number)、子帧号(subframe number)、以及同步偏移指示(syncOffsetIndicator)。示例性的，同步信号的内容包括但不限于以下信息：
Figure PCTCN2022139041-appb-000001
其中，同步信号中帧号的比特串(BIT STRING)大小为N；子帧号为整数(INTEGER)0,1,2,...,(N-1)；同步偏移指示为整数(INTEGER)0,1,2,3,...,(T-1)。举例来说，N可以为10。应理解，针对某个通信装置发送的同步信号，该同步信号中的帧号、子帧号以及同步偏移指示均为确定值，该同步信号中的帧号和子帧号用于表示发送该同步信号的子帧位置。
一种实现方式中，上述第一同步偏移指示(为便于描述，下文将第一同步偏移指示记为F1)可以为3GPP定义的同步偏移指示1(syncOffsetIndicator1)或同步偏移指示2(syncOffsetIndicator2)。这两个参数(即syncOffsetIndicator1和syncOffsetIndicator2)可以通过预配置的方式写入第二通信装置。这两个参数中的每个参数对应一个子帧位置。本申请实施例中的子帧位置可以通过帧号和子帧号来确定。举例来说，假设同步信号的发送周期为160ms，一个帧中包括10个子帧，即N等于10；第二通信装置可以在满足下述公式(1-1)的子帧位置上发送同步信号：
(10*frame number+subframe number)mod 160＝F1..............................................(1-1)
其中，frame number为帧号，subframe number为子帧号。F1表示第一同步偏移指示，其值为syncOffsetIndicator1或syncOffsetIndicator2，syncOffsetIndicator的取值范围为[0,159]。
第二通信装置在周期性广播同步信号之前，如果第二通信装置没有选择其他通信装置(指D2D网络中除第二通信装置外的通信装置)作为参考源，则第二通信装置可以作为参考源发送同步信号。也就是说，第二通信装置在syncOffsetIndicator1和syncOffsetIndicator2中随机选择一个值来确定发送同步信号的子帧位置。如果第二通信装置选择了一个其他通信装置(指D2D网络中除第二通信装置外的通信装置)作为参考源，则第二通信装置在 syncOffsetIndicator1和syncOffsetIndicator2中选择与参考源使用的syncOffsetIndicator不同的值，来确定自己发送同步信号的子帧位置。第二通信装置可以在确定出的子帧位置上发送同步信号。
另一种实现方式中，上述第一同步偏移指示(记为F1)可以为第一同步偏移指示集合中的值。或者，上述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数。第二通信装置在周期性广播同步信号之前，侦听/搜索其他通信装置发送的同步信号。如果第二通信装置侦听到/搜索到第三通信装置(第三通信装置为除第二通信装置外的通信装置)发送的同步信号(为便于区分，本申请实施例将第三通信装置发送的同步信号记为同步信号2)，则第二通信装置可以从第一同步偏移指示集合中随机选择一个值作为第一同步偏移指示。如果第二通信装置未侦听到/未搜索到任一同步信号，则第二通信装置可以从第二同步偏移指示集合[0,T)中随机选择一个值作为第一同步偏移指示。第二通信装置可以根据该第一同步偏移指示和同步信号的发送周期T确定子帧位置，并在确定出的子帧位置上发送同步信号。
其中，该第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合。该第三同步偏移指示为第二通信装置接收到第三通信装置发送的同步信号2时的子帧位置所对应的同步偏移指示。T为该同步信号的发送周期，其可以通过预配置的方式写入第二通信装置中，还可以通过其他方式告知第二通信装置，本申请实施例对第二通信装置获知同步信号的发送周期T的方式不做限制。该第二同步偏移指示集合[0,T)为整数集合，即该第二同步偏移指示集合为{0,1,2,3,...,(T-1)}。
上述第三同步偏移指示满足下述公式(1-2)：
Ind＝(FNoffset+INDy+T)mod T...............................................................................(1-2)
上述公式(1-2)中Ind表示第三同步偏移指示。FNoffset表示第二通信装置与第三通信装置在一个发送周期(即T)内的相对定时偏差。INDy表示第三通信装置发送的同步信号2中携带的第四同步偏移指示。T表示同步信号的发送周期。mod表示求余运算。也就是说，上述第一同步偏移指示集合(记为集合S)为第二同步偏移指示集合[0,T)中除Ind(即第三同步偏移指示)外的整数集合。
上述第二通信装置与第三通信装置在一个发送周期(即T)内的相对定时偏差(FNoffset)满足下述公式(1-3)：
FNoffset＝((N*FNx+SFNx)mod T)-((N*FNy+SFNy)mod T)..........................(1-3)
上述公式(1-3)中N表示一个帧内包含的子帧数。FNx和SFNx分别表示第二通信装置接收到第三通信装置发送的同步信号2时的帧号和子帧号。FNy和SFNy分别表示第三通信装置发送的同步信号2中携带的帧号和子帧号。
S102，第一通信装置接收第二通信装置发送的同步信号。
S103，第一通信装置确定第二同步偏移指示，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定。
S104，第一通信装置在第一子帧位置上发送接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定，该接入消息用于进行上行同步。
可选的，第一通信装置接收到第二通信装置发送的同步信号后，如果第一通信装置想要接入第二通信装置，或者说第一通信装置想要与第二通信装置进行通信，或者说第一通信装置有待发送给第二通信装置的缓存数据等；则第一通信装置可以执行接入处理。具体的，第一通信装置接收到第二通信装置发送的同步信号后，可以根据该同步信号中携带的帧号 (frame number)和子帧号(subframe number)调整自身的定时与第二通信装置一致。举例来说，第一通信装置接收到该同步信号后，可以将自己当前的帧号调整为与该同步信号中携带的帧号相同，并将自己当前的子帧号调整为与该同步信号中携带的子帧号相同。第一通信装置可以根据该同步信号中携带的第一同步偏移指示(F1)和预设偏移量确定第二同步偏移指示(为便于描述，下文将该第二同步偏移指示记为F2)。第一通信装置可以根据该第二同步偏移指示(F2)和同步信号的发送周期确定第一子帧位置，并在该第一子帧位置上发送接入消息。该接入消息用于进行上行同步。该接入消息可以是message 1(消息1，简称Msg1)。举例来说，第一通信装置可以在满足下述公式(1-4)的子帧位置(即帧号和子帧号)上向第二通信装置发送Msg1：
(N*frame number+subframe number)mod T＝F2...................................................(1-4)
上述公式(1-4)中，N表示一个帧中包含的子帧数。frame number为帧号，subframe number为子帧号。mod表示求余运算。F2表示上述第二同步偏移指示，T表示同步信号的发送周期。
其中，上述预设偏移量(offset)可以是预先设置的，或协议规定的，或预先协商的，等等。本申请中的预设可以理解为设置、预先设置、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
可选的，该预设偏移量可以表示第二通信装置与第一通信装置约定的接入消息的发送位置、与同步信号发送位置的偏移量。或者，该预设偏移量可以表示第二通信装置与第一通信装置约定的接入消息的同步偏移指示、与同步信号的同步偏移指示之间的偏移量。因此，该第二同步偏移指示(F2)为：
F2＝(F1+offset)mod T....................................................................................................(1-5)
上述公式(1-5)中，F2表示第二同步偏移指示，F1表示第一同步偏移指示，offset表示预设偏移量，T表示同步信号的发送周期，mod表示求余运算。举例来说，offset的值为1，那么第二同步偏移指示即F2＝(F1+1)mod T。
应理解，本申请实施例提及的同步偏移指示(syncOffsetIndicator)也可以称为同步指示或指示(Indicator)等，本申请实施例对其名称不做限制。
本申请实施例中，因为第一通信装置在固定的子帧位置发送接入消息，所以第二通信装置也可以在固定的子帧位置接收该接入消息，无需第二通信装置在所有子帧位置上去监听/解析接入消息，可以节省第二通信装置的功耗。另外，因为接入消息的发送位置固定，可以降低接入流程的复杂性。
S105，第二通信装置确定第二同步偏移指示，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定。
S106，第二通信装置在第一子帧位置上接收接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定。
可选的，第二通信装置可以根据上述第一同步偏移指示(F1)和预设偏移量确定第二同步偏移指示(F2)。应理解，第二通信装置确定第二同步偏移指示的方式与第一通信装置确定第二同步偏移指示的方式相同，可参考上文相关描述，此处不赘述。第二通信装置可以根据该第二同步偏移指示(F2)和同步信号的发送周期确定第一子帧位置，并在该第一子帧位置上接收接入消息。第二通信装置确定第一子帧位置的方式与第一通信装置确定第一子帧位置的方式相同，可参考上文相关描述，此处不赘述。第二通信装置接收到该接入消息后，可以计算第一通信装置的时间提前量(TA)信息，并可以将该时间提前量(TA)信息携带在该接 入消息的响应消息中发送给第一通信装置。具体计算时间提前量(TA)的方式可参考3GPP的规定，这里不赘述。示例性的，如果接入消息为Msg1，该接入消息的响应消息为Msg2。
本申请实施例通过第二通信装置与第一通信装置约定接入消息的发送位置，可以减少第二通信装置通知第一通信装置接入消息的发送位置的信令传输开销。
应理解，上述步骤S105的执行顺序与上述步骤S102-步骤S104的执行顺序不做限制。例如，步骤S105在步骤S102-步骤S104之前执行，或者步骤S105在步骤S102-步骤S104之后执行，或者步骤S105与步骤S102-步骤S104同时/并行执行。
可选的，步骤S106之后，该接入消息的发送和接收方法还包括：如果第一通信装置在第一时间(为便于描述，记为T1)内未接收到该接入消息的响应消息，则第一通信装置可以在第二子帧位置上重发接入消息(如Msg1)。该第二子帧位置与上述第一子帧位置之差为R个同步信号的发送周期。R的取值为大于或等于1的整数。举例来说，R可以为[1,M1]内的随机值，M1为大于或等于1的整数，M1可以为4。换句话说，如果第一通信装置在一段时间T1(ms)内未收到Msg2反馈，则在满足上述公式(1-4)的第R个子帧上重发Msg1。也就是说，当第一通信装置在一段时间(T1)内未接收到接入消息的响应消息时，可以采取随机回退的方法来重新发送接入消息。这样可以减少第一通信装置的功耗，减少对其他通信装置发送的接入消息的干扰。其中，第一时间T1可以为预设值、或协议规定的值、或第一通信装置与第二通信装置协商的值等。该第一时间T1可以大于同步信号的发送周期T。
例如，R等于3，T1等于1s，假设第一通信装置第一次发送Msg1的子帧是满足上述公式(1-4)的第1个子帧；如果第一通信装置在发送Msg1后的1s内未接收到Msg2反馈，则第一通信装置可以在满足上述公式(1-4)的第3个子帧上重发Msg1。由上述公式(1-4)可知，一个发送周期T内，只会有一个子帧满足上述公式(1-4)，所以第一通信装置第一次发送Msg1的子帧位置与重发Msg1的子帧位置相差R个发送周期。
可选的，如果第一通信装置在重发接入消息(如Msg1)后的T1时间内还是未收到该接入消息的响应消息(如Msg2)反馈，则第一通信装置可以继续执行随机回退的方法来重新发送接入消息，直到第一通信装置接收到响应消息反馈为止；或者直到第一通信装置尝试N1次接入后还是未收到该接入消息的响应消息(如Msg2)为止，此时接入失败，第一通信装置停止发送接入消息。其中，N1为正整数。N1可以是预设值、或协议规定的值、或第一通信装置与第二通信装置协商的值等。
当然，也可以是当第一通信装置在第一时间(T1)内未接收到该接入消息的响应消息时，确定第一通信装置接入第二通信装置失败，第一通信装置停止发送接入消息。
本申请实施例中，第二通信装置广播第一同步偏移指示(其携带于同步信号中)，并且和第一通信装置约定在第二同步偏移指示(等于第一同步偏移指示与预设偏移量之和)对应的子帧位置上发送接入消息，可以减少第二通信装置通知第一通信装置接入消息的发送位置的信令传输开销。第一通信装置接收到同步信号后，在第二同步偏移指示对应的子帧位置上发送接入消息；第二通信装置在第二同步偏移指示对应的子帧位置上接收接入消息；可以在固定的子帧位置收发接入消息，无需接收端在所有子帧位置上去监听/解析接入消息，降低接收端的功耗。另外，因为接入消息的发送位置固定，可以降低接入流程的复杂性。
一个可选实施例中，第二通信装置周期性广播同步信号；第一通信装置接收到该同步信号后，如果第一通信装置确定第二通信装置当前处于接收态/唤醒态/连接态/非节能态，则第一通信装置可以在任意子帧位置上发送接入消息。第二通信装置可以在所有子帧位置上监听/ 解析接入消息。或者，第一通信装置接收到该同步信号后，确定第二同步偏移指示并在第一子帧位置上发送接入消息，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定。相应的，第二通信装置在第一子帧位置上监听/解析接入消息。其中，该接入消息可以用于进行上行同步。第二通信装置可以一直处于接收态/唤醒态/连接态/非节能态，或者第二通信装置可以周期性唤醒。应理解，这里的接收态/唤醒态/连接态/非节能态可以理解为能够在所有子帧位置上监听/解析接入消息的状态。
换句话说，当第二通信装置持续处于接收态时，第一通信装置可在任意子帧位置发送Msg1。当第二通信装置是周期性唤醒时，因为第一通信装置可以获知第二通信装置的唤醒周期，所以第一通信装置可以在第二通信装置的唤醒期间的任意子帧位置上发送Msg1；或者第一通信装置在第二同步偏移指示对应的子帧位置上发Msg1。
本申请实施例提供一种D2D网络的接入方法，可以为UE间通信奠定基础。
上述内容详细阐述了本申请的方法，为便于更好地实施本申请实施例的上述方案，本申请实施例还提供了相应的装置或设备。
本申请实施例可以根据上述方法示例对第一通信装置和第二通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面将结合图4至图6详细描述本申请实施例的通信装置。
在采用集成的单元的情况下，参见图4，图4是本申请实施例提供的通信装置的一结构示意图。如图4所示，该通信装置包括：收发单元11和处理单元12。
在本申请的一些实施例中，该通信装置可以为第一通信装置或者可以设置于第一通信装置中的芯片或电路。即该通信装置可以用于执行上文方法实施例中第一通信装置执行的步骤或功能等。
其中，收发单元11，用于接收第二通信装置发送的同步信号；处理单元12，用于第二同步偏移指示，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定；该收发单元11，还用于在第一子帧位置上发送接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定，该接入消息用于进行上行同步。
可选的，上述第二同步偏移指示为：
F2＝(F1+offset)mod T；
其中，F2表示该第二同步偏移指示，F1表示该第一同步偏移指示，offset表示该预设偏移量，T表示该同步信号的发送周期，mod表示求余运算。
可选的，上述收发单元11，还用于：若在第一时间内未接收到该接入消息的响应消息，则在第二子帧位置上重发接入消息，该第二子帧位置与该第一子帧位置之差为R个该同步信号的发送周期，该R的取值为大于或等于1的整数。
可选的，上述第一同步偏移指示为第一同步偏移指示集合中的值，该第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，该第三同步偏移指示为该第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，该第三通信装置为除该第二通信装置外的通信装置，该T为该同步信号的发送周期。
可选的，上述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，该T为该同步信号的发送周期。
应理解，该通信装置可对应执行前述方法实施例，并且该通信装置中的各个单元的上述操作或功能分别为了实现前述方法实施例中第一通信装置的相应操作，其技术效果参见前述方法实施例中的技术效果，为了简洁，在此不再赘述。
在本申请的另一些实施例中，该通信装置可以为第二通信装置或者可以设置于第二通信装置中的芯片或电路。即该通信装置可以用于执行上文方法实施例中第二通信装置执行的步骤或功能等。
其中，收发单元11，用于发送同步信号；处理单元12，用于确定第二同步偏移指示，该第二同步偏移指示基于该同步信号中携带的第一同步偏移指示和预设偏移量确定；该收发单元11，还用于在第一子帧位置上接收接入消息，该第一子帧位置基于该第二同步偏移指示和该同步信号的发送周期确定，该接入消息用于进行上行同步。
可选的，上述第二同步偏移指示为：
F2＝(F1+offset)mod T；
其中，F2表示该第二同步偏移指示，F1表示该第一同步偏移指示，offset表示该预设偏移量，T表示该同步信号的发送周期，mod表示求余运算。
可选的，上述收发单元11还用于：在第二子帧位置上接收接入消息，该第二子帧位置与该第一子帧位置之差为R个该同步信号的发送周期，该R的取值为大于或等于1的整数。
可选的，上述第一同步偏移指示为第一同步偏移指示集合中的值，该第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，该第三同步偏移指示为该第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，该第三通信装置为除该第二通信装置外的通信装置，该T为该同步信号的发送周期。
可选的，上述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，该T为该同步信号的发送周期。
一个示例中，上述图4所示的通信装置可以为设置于第一通信装置或第二通信装置中的芯片或电路。参见图5，图5是本申请实施例提供的通信装置的另一结构示意图。该通信装置以芯片的形式存在，可用于实现上述方法实施例中第一通信装置或第二通信装置描述的方法，可以参见上述方法实施例中的说明。该通信装置可包括处理器501以及耦合于处理器501的一个或者多个接口电路502。
示例性的，处理器501可用于读取和执行计算机可读指令。具体实现中，处理器501可主要包括控制器、运算器和寄存器等。示例性的，控制器主要负责指令译码，并为指令对应的操作发出控制信号。运算器主要负责执行定点或浮点算数运算操作、移位操作以及逻辑操作等，也可以执行地址运算和转换。寄存器主要负责保存指令执行过程中临时存放的寄存器操作数和中间操作结果等。具体实现中，处理器501的硬件架构可以是专用集成电路(application specific integrated circuits，ASIC)架构、无互锁管道阶段架构的微处理器(microprocessor without interlocked piped stages architecture，MIPS)架构、进阶精简指令集机器(advanced RISC machines，ARM)架构或者NP架构等等。处理器501可以是单核的，也可以是多核的。
示例性的，接口电路502可用于输入待处理的同步信号至处理器501，并且可以向外输出处理器501的处理结果。具体实现中，接口电路502可以是通用输入输出(general purpose  input output，GPIO)接口，可以和多个外围设备(如无线通信模块、传感模块等等)连接。接口电路502通过总线503与处理器501相连。
具体实现中，处理器501可用于从存储器中调用上述方法实施例所实现的接入消息的发送方法的代码，使得该通信装置可以实现该接入消息的发送方法的各个步骤。存储器可以和处理器501集成在一起，也可以通过接口电路502与芯片相耦合，也就是说存储器可以是芯片的一部分，也可以独立于该芯片。接口电路502可用于输出处理器501的执行结果。示例性的，本申请中，接口电路502可具体用于输出处理器501生成的接入消息或同步信号。
需要说明的，处理器501、接口电路502各自对应的功能既可以通过硬件设计实现，也可以通过软件设计来实现，还可以通过软硬件结合的方式来实现，这里不作限制。
另一个示例中，上述图4所示的通信装置可以为一个整机的设备，即第一通信装置或第二通信装置。参见图6，图6是本申请实施例提供的通信装置的又一结构示意图。通信装置可用于实现上述方法实施例中第一通信装置或第二通信装置描述的方法，可以参见上述方法实施例中的说明。该通信装置可包括一个或多个处理器1001和收发单元1005。
处理器1001可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对装置(如，UE或芯片等)进行控制，执行软件程序，处理软件程序的数据。收发单元1005，用以实现信号的输入(接收)和输出(发送)。例如，通信装置可以为芯片，该收发单元可以是芯片的输入和/或输出电路，或者通信接口。该芯片可以用于终端设备(比如UE)。又如，通信装置可以为终端设备(比如UE)，该收发单元可以为收发器，射频芯片等。
可选的，该一个或多个处理器1001可实现前述方法实施例中的方法。
可选的，处理器1001除了实现前述实施例的方法，还可以实现其他功能。
可选的，一种设计中，处理器1001也可以包括指令1003，所述指令可以在所述处理器上被运行，使得通信装置执行上述方法实施例中描述的方法。
在又一种可能的设计中，通信装置也可以包括电路，所述电路可以实现前述方法实施例中的功能。
在又一种可能的设计中，通信装置中可以包括一个或多个存储器1002，其上存有指令1004，所述指令可在所述处理器上被运行，使得通信装置执行上述方法实施例中第一通信装置或第二通信装置描述的方法。可选的，所述存储器中还可以存储有数据。可选的处理器中也可以存储指令和/或数据。例如，所述一个或多个存储器1002可以存储上述实施例中所描述的预设偏移值和/或同步信号的发送周期，或者上述实施例中所涉及的其他信息。所述处理器和存储器可以单独设置，也可以集成在一起。
在又一种可能的设计中，通信装置还可以包括收发单元1005以及天线1006，或者，包括通信接口。收发单元1005可以称为收发机、收发电路、或者收发器等，用于通过天线1006实现通信装置的收发功能。所述通信接口(图中未示出)，可以用于终端设备之间的通信。可选的，该通信接口可以为有线通信的接口，比如光纤通信的接口。
处理器1001可以称为处理单元，对通信装置(比如UE)进行控制。
应理解，在本申请实施例中的处理器可以是中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。 通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件(如电路)、固件或其他任意组合来实现。当使用软件实现时，上述实施例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包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、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，例如光纤，或是无线，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合的服务器、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、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
本申请实施例还提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行前述方法实施例中第一通信装置或第二通信装置所描述的方法步骤。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质上存储有程序指令，当其在计算机上运行时，使得该计算机执行前述方法实施例中第一通信装置或第二通信装置所描述的方法步骤。
本申请实施例还提供一种装置，该装置可以为芯片。该芯片包括处理器。该处理器用于读取并执行存储器中存储的计算机程序，以执行前述方法实施例的任意可能的实现方式中的方法。可选的，该芯片还包括存储器，该存储器与该处理器通过电路或电线连接。进一步可选的，该芯片还包括通信接口，该处理器与该通信接口连接。该通信接口用于接收需要处理的数据和/或信号，该处理器从该通信接口获取该数据和/或信号，并对该数据和/或信号进行处理，并通过该通信接口输出处理结果。该通信接口可以是输入输出接口。
可选的，上述的处理器与存储器可以是物理上相互独立的单元，或者，存储器也可以和处理器集成在一起。
本申请的另一实施例中，还提供一种通信系统。该通信系统包括第一通信装置和第二通信装置，该第一通信装置和该第二通信装置可以执行前述方法实施例中的方法。
本领域普通技术人员可以理解实现上述方法实施例中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。
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所述权利要求的保护范围为准。

Claims (23)

  1. 一种接入消息的发送方法，其特征在于，包括：
    第一通信装置接收第二通信装置发送的同步信号；
    所述第一通信装置确定第二同步偏移指示，所述第二同步偏移指示基于所述同步信号中携带的第一同步偏移指示和预设偏移量确定；
    所述第一通信装置在第一子帧位置上发送接入消息，所述第一子帧位置基于所述第二同步偏移指示和所述同步信号的发送周期确定，所述接入消息用于进行上行同步。
  2. 根据权利要求1所述的方法，其特征在于，所述第二同步偏移指示为：
    F2＝(F1+offset)mod T；
    其中，F2表示所述第二同步偏移指示，F1表示所述第一同步偏移指示，offset表示所述预设偏移量，T表示所述同步信号的发送周期，mod表示求余运算。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一通信装置在第一子帧位置上发送接入消息之后，所述方法还包括：
    若在第一时间内未接收到所述接入消息的响应消息，则所述第一通信装置在第二子帧位置上重发接入消息，所述第二子帧位置与所述第一子帧位置之差为R个所述同步信号的发送周期，所述R的取值为大于或等于1的整数。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述第一同步偏移指示为第一同步偏移指示集合中的值，所述第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，所述第三同步偏移指示为所述第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，所述第三通信装置为除所述第二通信装置外的通信装置，所述T为所述同步信号的发送周期。
  5. 根据权利要求1-3中任一项所述的方法，其特征在于，所述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，所述T为所述同步信号的发送周期。
  6. 一种接入消息的接收方法，其特征在于，包括：
    第二通信装置发送同步信号；
    所述第二通信装置确定第二同步偏移指示，所述第二同步偏移指示基于所述同步信号中携带的第一同步偏移指示和预设偏移量确定；
    所述第二通信装置在第一子帧位置上接收接入消息，所述第一子帧位置基于所述第二同步偏移指示和所述同步信号的发送周期确定，所述接入消息用于进行上行同步。
  7. 根据权利要求6所述的方法，其特征在于，所述第二同步偏移指示为：
    F2＝(F1+offset)mod T；
    其中，F2表示所述第二同步偏移指示，F1表示所述第一同步偏移指示，offset表示所述预设偏移量，T表示所述同步信号的发送周期，mod表示求余运算。
  8. 根据权利要求6或7所述的方法，其特征在于，所述第二通信装置在第一子帧位置上接收接入消息之后，所述方法还包括：
    所述第二通信装置在第二子帧位置上接收接入消息，所述第二子帧位置与所述第一子帧位置之差为R个所述同步信号的发送周期，所述R的取值为大于或等于1的整数。
  9. 根据权利要求6-8中任一项所述的方法，其特征在于，所述第一同步偏移指示为第一同步偏移指示集合中的值，所述第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，所述第三同步偏移指示为所述第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，所述第三通信装置为除所述第二通信装置外的通信装置，所述T为所述同步信号的发送周期。
  10. 根据权利要求6-8中任一项所述的方法，其特征在于，所述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，所述T为所述同步信号的发送周期。
  11. 一种第一通信装置，其特征在于，包括：
    收发单元，用于接收第二通信装置发送的同步信号；
    处理单元，用于确定第二同步偏移指示，所述第二同步偏移指示基于所述同步信号中携带的第一同步偏移指示和预设偏移量确定；
    所述收发单元，还用于在第一子帧位置上发送接入消息，所述第一子帧位置基于所述第二同步偏移指示和所述同步信号的发送周期确定，所述接入消息用于进行上行同步。
  12. 根据权利要求11所述的第一通信装置，其特征在于，所述第二同步偏移指示为：
    F2＝(F1+offset)mod T；
    其中，F2表示所述第二同步偏移指示，F1表示所述第一同步偏移指示，offset表示所述预设偏移量，T表示所述同步信号的发送周期，mod表示求余运算。
  13. 根据权利要求11或12所述的第一通信装置，其特征在于，所述收发单元，还用于：
    若在第一时间内未接收到所述接入消息的响应消息，则在第二子帧位置上重发接入消息，所述第二子帧位置与所述第一子帧位置之差为R个所述同步信号的发送周期，所述R的取值为大于或等于1的整数。
  14. 根据权利要求11-13中任一项所述的第一通信装置，其特征在于，所述第一同步偏移指示为第一同步偏移指示集合中的值，所述第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，所述第三同步偏移指示为所述第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，所述第三通信装置为除所述第二通信装置外的通信装置，所述T为所述同步信号的发送周期。
  15. 根据权利要求11-13中任一项所述的第一通信装置，其特征在于，所述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，所述T为所述同步信号的发送周期。
  16. 一种第二通信装置，其特征在于，包括：
    收发单元，用于发送同步信号；
    处理单元，用于确定第二同步偏移指示，所述第二同步偏移指示基于所述同步信号中携带的第一同步偏移指示和预设偏移量确定；
    所述收发单元，还用于在第一子帧位置上接收接入消息，所述第一子帧位置基于所述第二同步偏移指示和所述同步信号的发送周期确定，所述接入消息用于进行上行同步。
  17. 根据权利要求16所述的第二通信装置，其特征在于，所述第二同步偏移指示为：
    F2＝(F1+offset)mod T；
    其中，F2表示所述第二同步偏移指示，F1表示所述第一同步偏移指示，offset表示所述预设偏移量，T表示所述同步信号的发送周期，mod表示求余运算。
  18. 根据权利要求16或17所述的第二通信装置，其特征在于，所述收发单元还用于：
    在第二子帧位置上接收接入消息，所述第二子帧位置与所述第一子帧位置之差为R个所述同步信号的发送周期，所述R的取值为大于或等于1的整数。
  19. 根据权利要求16-18中任一项所述的第二通信装置，其特征在于，所述第一同步偏移指示为第一同步偏移指示集合中的值，所述第一同步偏移指示集合是第二同步偏移指示集合[0,T)中除第三同步偏移指示外的整数集合，所述第三同步偏移指示为所述第二通信装置接收到第三通信装置发送的同步信号时的子帧位置所对应的同步偏移指示，所述第三通信装置为除所述第二通信装置外的通信装置，所述T为所述同步信号的发送周期。
  20. 根据权利要求16-18中任一项所述的第二通信装置，其特征在于，所述第一同步偏移指示为第二同步偏移指示集合[0,T)中的整数，所述T为所述同步信号的发送周期。
  21. 一种通信装置，其特征在于，包括处理器和收发器，所述收发器用于收发同步信号和接入消息，所述处理器用于执行程序指令，以使得所述通信装置执行如权利要求1-10中任一项所述的方法。
  22. 一种通信装置，其特征在于，包括处理器和接口电路；
    所述接口电路，用于接收代码指令并传输至所述处理器；
    所述处理器用于运行所述代码指令以执行如权利要求1-10中任一项所述的方法。
  23. 一种可读存储介质，用于存储指令，当所述指令被执行时，使如权利要求1-10中任一项所述的方法被实现。
PCT/CN2022/139041 2021-12-23 2022-12-14 接入消息的发送和接收方法、装置及可读存储介质 WO2023116534A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111594670.7A CN116347403A (zh) 2021-12-23 2021-12-23 接入消息的发送和接收方法、装置及可读存储介质
CN202111594670.7 2021-12-23

Publications (1)

Publication Number Publication Date
WO2023116534A1 true WO2023116534A1 (zh) 2023-06-29

Family

ID=86875015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/139041 WO2023116534A1 (zh) 2021-12-23 2022-12-14 接入消息的发送和接收方法、装置及可读存储介质

Country Status (2)

Country Link
CN (1) CN116347403A (zh)
WO (1) WO2023116534A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105992331A (zh) * 2015-01-29 2016-10-05 中兴通讯股份有限公司 通信处理方法、装置及用户设备
CN106162597A (zh) * 2015-04-10 2016-11-23 中兴通讯股份有限公司 设备到设备d2d传输方法及装置
CN107925854A (zh) * 2015-08-21 2018-04-17 日本电气株式会社 车辆到任意对象(v2x)通信方法和系统
WO2020197187A1 (ko) * 2019-03-26 2020-10-01 엘지전자 주식회사 무선 통신 시스템에서 단말이 임의 접속 과정을 수행하기 위한 신호를 송수신하는 방법 및 이를 위한 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105992331A (zh) * 2015-01-29 2016-10-05 中兴通讯股份有限公司 通信处理方法、装置及用户设备
CN106162597A (zh) * 2015-04-10 2016-11-23 中兴通讯股份有限公司 设备到设备d2d传输方法及装置
CN107925854A (zh) * 2015-08-21 2018-04-17 日本电气株式会社 车辆到任意对象(v2x)通信方法和系统
WO2020197187A1 (ko) * 2019-03-26 2020-10-01 엘지전자 주식회사 무선 통신 시스템에서 단말이 임의 접속 과정을 수행하기 위한 신호를 송수신하는 방법 및 이를 위한 장치

Also Published As

Publication number Publication date
CN116347403A (zh) 2023-06-27

Similar Documents

Publication Publication Date Title
EP3190838B1 (en) Systems and methods for synchronization within a neighbor aware network
JP6527965B2 (ja) チャネル効率の高い分散方式のピアステーション間のデータ伝送の方法及びシステム
US8902803B2 (en) Systems and methods for reducing collisions after traffic indication map paging
US10200950B2 (en) Apparatus, system and method of discovering a wireless communication device
WO2019157758A1 (zh) 一种信息处理方法和装置
JP2015505202A (ja) 発見メッセージおよびページングメッセージを送信および受信するためのシステムおよび方法
US20180027494A1 (en) Apparatus, system and method of neighbor awareness networking (nan) data link (ndl) power save
JP2015513243A (ja) トラフィックインジケーションマップページングの後の衝突を低減するシステムおよび方法
US10750535B2 (en) Apparatus, system and method of neighbor awareness networking (NAN) communication
JP2022550159A (ja) ウェイクアップ信号検出方法および装置
CN107534848B (zh) 一种以分散和省电方式进行数据通信的系统和方法
CN113596963A (zh) 通信方法及装置
KR20130106815A (ko) 무선통신 시스템에서 슬립 모드 단말의 데이터 수신 방법 및 장치
WO2022188105A1 (zh) 无线通信的方法及设备
JP2016518071A (ja) ネットワーク上でのインフラストラクチャサービスの電力効率発見のためのシステムおよび方法
JP6275741B2 (ja) ワイヤレスメッセージ中の遅延指示のためのシステムおよび方法
WO2023116534A1 (zh) 接入消息的发送和接收方法、装置及可读存储介质
WO2023116286A1 (zh) 同步信号的发送方法、装置及可读存储介质
US20180054798A1 (en) Apparatus, system and method of communicating in a data group
WO2019045765A1 (en) APPARATUS, SYSTEM AND METHOD FOR SECURE NEIGHBORHOOD SENSITIVE NETWORK COMMUNICATION (NAN)
EP4351229A1 (en) Method and apparatus for determining energy-saving signal monitoring occasion, and terminal device
WO2023024009A1 (zh) 一种节能信号的传输资源的确定方法及装置、终端设备
WO2022188078A1 (zh) 无线通信的方法、终端设备和网络设备
TW202416749A (zh) 通信方法和通信裝置
CN117812728A (zh) 一种上行唤醒的方法及装置

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: 22909848

Country of ref document: EP

Kind code of ref document: A1