WO2019100963A1 - 通信处理方法和装置 - Google Patents

通信处理方法和装置 Download PDF

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Publication number
WO2019100963A1
WO2019100963A1 PCT/CN2018/115015 CN2018115015W WO2019100963A1 WO 2019100963 A1 WO2019100963 A1 WO 2019100963A1 CN 2018115015 W CN2018115015 W CN 2018115015W WO 2019100963 A1 WO2019100963 A1 WO 2019100963A1
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WO
WIPO (PCT)
Prior art keywords
message
node
synchronization source
intermediate node
target
Prior art date
Application number
PCT/CN2018/115015
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English (en)
French (fr)
Inventor
朱元萍
戴明增
王瑞
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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18881787.8A priority Critical patent/EP3694121B1/en
Publication of WO2019100963A1 publication Critical patent/WO2019100963A1/zh
Priority to US16/884,320 priority patent/US11191050B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0673—Clock or time synchronisation among packet nodes using intermediate nodes, e.g. modification of a received timestamp before further transmission to the next packet node, e.g. including internal delay time or residence time into the packet
    • 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
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/005—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by adjustment in the receiver

Definitions

  • the present application relates to the field of communications, and in particular, to a communication processing method and apparatus in the field of communications.
  • TDD time division duplex
  • MBSFN multicast-broadcast single-frequency network
  • the fifth generation mobile communication 5-generation, 5G
  • a wider subcarrier design for example, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.
  • the subcarrier width is inversely proportional to the subframe length, Therefore, the wider the subcarrier, the smaller the guard interval (GP) and the cyclic prefix (CP), and the smaller the margin left for the synchronization error. Therefore, the 5G new radio (NR) has higher requirements for inter-site synchronization than the existing fourth-generation mobile communication systems and others.
  • GP guard interval
  • CP cyclic prefix
  • a wired network such as an internet protocol (IP) network
  • IP internet protocol
  • IEEE 1588 protocol Institute of Electrical and Electronics Engineers
  • the IEEE 1588 message is stamped, and the time and frequency offset are calculated by using accurate time stamps to achieve master-slave frequency and time synchronization, and the precision can reach microseconds.
  • the synchronization error is transmitted hop by hop.
  • a one-hop scheme can achieve a synchronization accuracy of 1us. After three-hop transmission, the synchronization accuracy between stations will be reduced to 3us, and the synchronization accuracy will be greatly reduced.
  • the hop-by-hop synchronization scheme will result in a limited number of hops that the network can support.
  • the target node to be synchronized only needs to synchronize with the synchronization source node as the clock source, and the intermediate node directly forwards the data as a transparent transmission node.
  • this method assumes that the data is in the synchronization source.
  • the round-trip delay between the node and the target node is the same, which makes the clock synchronization less accurate.
  • how to improve the accuracy of clock synchronization is a technical problem to be solved.
  • the present application provides a communication processing method and apparatus, which can improve the accuracy of clock synchronization in a multi-hop relay scenario.
  • a communication processing method comprising: receiving, by a target node, a second message sent by a synchronization source node by using at least one intermediate node, wherein the second message carries a first message from the target node in the a reception time at the synchronization source node and latency information of the first message at each of the at least one intermediate node; the target node transmitting at the target node according to the first message The time and the time information in the second message determine a clock offset between the target node and the synchronization source node.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the foregoing waiting time information may include a time when the first intermediate node receives the first message and a time when the first intermediate node sends the first message, and may also include a time when the first intermediate node sends the first message.
  • the difference between the time when the first intermediate node receives the first message is not limited by the embodiment of the present application.
  • the source address of the first message is the address of the target node
  • the destination address is the address of the synchronization source node
  • the source address of the second message is the address of the synchronization source node
  • the destination address is the address of the target node
  • the first intermediate The node can forward the received message according to the routing protocol.
  • the target node and the synchronization source node may display corresponding fields carrying the source address and the destination address in the sent message, or may be in an implicit manner (for example, a channel, a bearer, or a special message type, etc.).
  • the source address and the destination address of the sent message are not limited in this embodiment of the present application.
  • the process of processing the message by the intermediate node is only adding the waiting time information, the format and other contents of the message are not changed.
  • the first message received by the first intermediate node passes through the first intermediate node. After the waiting time information is added, it is still referred to as the first message, and the subsequent second message and the third message are similar, and will not be described again.
  • the foregoing node determines the sending time of the message, which may be based on a physical layer frame or a subframe sent by the node.
  • the start time or the end time indicates the sending time of the message; similarly, the node determines the receiving time of the message according to the start time or end time of the physical layer frame or subframe received by the node. Indicates the time the message was received.
  • the target node may send multiple first messages to the synchronization source node, and the first intermediate node may select one of the first messages to add waiting time information, and notify the selected first message.
  • the target node so that the target node can subsequently calculate the clock between the target node and the synchronization source node according to the sending time of the first message selected by the first intermediate node and the time information in the received second message. deviation.
  • the second message further includes a sending time of the second message at the synchronization source node and the second message in each of Waiting time information at the intermediate node; the target node determines, according to the sending time of the first message at the target node and the time information in the second message, the target node and the synchronization source node Inter-clock skew, comprising: a sending time of the target node according to the first message at the target node, a receiving time of the second message at the target node, and a time in the second message Information determining a clock offset between the target node and the synchronization source node.
  • clock synchronization can be implemented by transmitting two messages, and signaling interaction between the target node and the synchronization source node is reduced.
  • the synchronization source node may record the sending time of the second message, and carry the sending time of the second message in the second message.
  • the first intermediate node receives the second message sent by the synchronization source node, where the second message carries the sending time of the first message, the receiving time of the first message, the waiting time information of the first message at the intermediate node, and the The time when the second message was sent.
  • the first intermediate node may add waiting time information of the second message at the first intermediate node in the second message, and send the second message.
  • the target node receives the second message and records the receiving time of the second message.
  • the target node may be configured according to the sending time of the first message, the receiving time of the first message, the waiting time information of the first message at the intermediate node, the sending time of the second message, and the second message.
  • the waiting time information at the first intermediate node and the receiving time of the second message determine a clock offset between the target node and the synchronization source node.
  • the determining a clock offset between the target node and the synchronization source node includes:
  • the target node determines a clock offset between the target node and the synchronization source node according to the following formula:
  • T 4 is a receiving time of the second message at the target node
  • T 3 is a sending time of the second message at the synchronization source node
  • T 2 is the first message in the The receiving time at the synchronization source node
  • T 1 is the transmission time of the first message at the target node
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • j is used for a label indicating the at least one intermediate node
  • j 1, . . . , N
  • T j (wd) is a waiting time of the second message at the intermediate node j
  • T j (wu) is the first The waiting time of the message at the intermediate node j.
  • the method before the target node sends the first message to the synchronization source node through the at least one intermediate node, the method further includes: the target node receiving the synchronization a third message sent by the source node by the at least one intermediate node, where the third message carries a sending time of the third message at the synchronization source node, and the third message is in each intermediate node.
  • the target node sends the first message to the synchronization source node by using the at least one intermediate node according to the third message; the target node is according to the first message Determining a clock offset between the target node and the synchronization source node, where the target node is in the target according to the first message a transmission time at the node, time information in the second message, a reception time of the third message at the target node, and a third message Offers, determining a clock offset between the target node and the node synchronization source.
  • the synchronization source node may record the sending time of the third message, and carry the sending time of the third message in the third message for sending.
  • the first intermediate node receives the third message, and adds, in the third message, waiting time information of the third message at the first intermediate node, where the first intermediate node sends the third message.
  • the target node receives the third message and records the receiving time of the third message.
  • the third message received by the target node carries the sending time of the third message at the synchronization source node and the waiting time information of the third message at the first intermediate node.
  • the target node After receiving the third message, the target node sends a first message whose destination address is the synchronization source node, and records the sending time of the first message.
  • the first message passes through the first intermediate node, and the first intermediate node adds the waiting time information of the first message at the first intermediate node in the first message, and then sends the first message.
  • the synchronization source node receives the first message, records the reception time of the first message, and then sends a second message whose destination address is the address of the target node.
  • the first message received by the synchronization source node carries the waiting time information of the first message added by the first intermediate node at the first intermediate node, and therefore, the synchronization source node receives the first message. And the waiting time information of the first message at the first intermediate node is carried together in the second message to be sent to the target node.
  • the second message arrives at the target node by using the first intermediate node, and the target node may be based on the previously sent time of the first message, the sending time of the third message at the synchronization source node, and the third message at the target
  • the foregoing third message may be a Sync notification, but the embodiment of the present application does not limit this.
  • the third message may be sent by the synchronization source node periodically, or may be triggered by the event triggering synchronization source node, for example, the synchronization source node sends the third message after receiving the synchronization request of the target node.
  • the information in the embodiment of the present application is not limited thereto.
  • the determining a clock offset between the target node and the synchronization source node includes:
  • the target node determines a clock offset between the target node and the synchronization source node according to the following formula:
  • T 6 is a receiving time of the third message at the target node
  • T 5 is a sending time of the third message at the synchronization source node
  • T 2 is the first message in the The receiving time at the synchronization source node
  • T 1 is the transmission time of the first message at the target node
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • T j (wu) is the waiting time of the first message at the intermediate node j.
  • the third message is sent by the synchronization source node and the at least one intermediate node in a broadcast or multicast manner.
  • the foregoing third message may be that the synchronization source node and the first intermediate node are sent by means of broadcast or multicast, which can further reduce signaling overhead between sites.
  • the method before the target node receives the second message sent by the synchronization source node through the at least one intermediate node, the method further includes: the target node passing the At least one intermediate node sends a synchronization request message to the synchronization source node, the synchronization request message is used to request clock synchronization with the synchronization source node; and the target node receives the synchronization source node through the at least one intermediate node A synchronization response message is sent, the synchronization response message is used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node.
  • the target node may send a synchronization request message to the synchronization source node through at least one intermediate node, requesting clock synchronization with the synchronization source node. At least one intermediate node including the first intermediate node directly forwards the synchronization request message.
  • the synchronization source node receives the synchronization request message, and if the synchronization source node agrees to be the synchronization source of the target node, the synchronization source node sends a synchronization response message to the target node through at least one intermediate node. At least one intermediate node including the first intermediate node directly forwards the synchronization response message.
  • the target node receives the synchronization response message, and sends a first message according to the synchronization response message.
  • the method further includes: the target node transmitting a fourth message, where the fourth message is used to indicate the target node and the synchronization source node The number of hops used by other target nodes to determine whether to synchronize clocks with the target node.
  • the synchronization source node that can be used as a reference reference may be a node with GPS synchronization capability, or a node that is synchronized with the transmission network through the IEEE 1588 protocol, and the like. It should also be understood that the foregoing target node sends the fourth message, which may be sent by means of multicast or unicast, which is not limited in this embodiment of the present application.
  • all nodes in the network can transmit the hop count between themselves and the synchronization source node that can be used as a reference for other nodes (other target nodes) that need to perform clock synchronization, and select a synchronization source.
  • other target nodes may select a node with the smallest hop count as a synchronization source, and perform clock synchronization with the node with the smallest hop count.
  • another communication processing method including: a synchronization source node receives a first message sent by a target node by using at least one intermediate node, the first message carrying the first message in the at least one intermediate node Waiting time information at each of the intermediate nodes; the synchronization source node sends a second message to the target node by the at least one intermediate node according to the first message, where the second message carries the The reception time of the first message at the synchronization source node and the latency information of the first message at each of the at least one intermediate node.
  • the second message further carries a sending time of the second message at the synchronization source node.
  • the method before the synchronization source node receives the first message sent by the target node by the at least one intermediate node, the method further includes: the synchronization source node passes the The at least one intermediate node sends a third message to the target node, where the third message carries a sending time of the third message at the synchronization source node.
  • the third message is sent by the synchronization source node in a broadcast or multicast manner.
  • the method before the synchronization source node receives the first message sent by the target node by the at least one intermediate node, the method further includes: the synchronization source node receiving the a synchronization request message sent by the target node by the at least one intermediate node, the synchronization request message is used to request clock synchronization with the synchronization source node; and the synchronization source node passes the at least the synchronization request message according to the synchronization request message An intermediate node sends a synchronization response message to the target node, the synchronization response message being used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node.
  • another communication processing method including: adding, by a first intermediate node, waiting time information of the first message at the first intermediate node in a first message from a target node, and sending the The first message is received by the first intermediate node, where the second message carries the receiving time of the first message at the synchronization source node and the first message is in at least one intermediate node. Waiting time information at each intermediate node, the at least one intermediate node including the first intermediate node; the first intermediate node transmitting the second message.
  • the first intermediate node sends the second message, including: the first intermediate node adds the second message to the second message Waiting time information at the first intermediate node and transmitting the second message.
  • the first intermediate node adds latency information of the first message at the first intermediate node in a first message from a target node
  • the method further includes: the first intermediate node receiving a third message, where the third message carries a sending time of the third message at the synchronization source node; The first intermediate node adds waiting time information of the third message at the first intermediate node in the third message, and sends the third message.
  • the third message is sent by the synchronization source node and the first intermediate node by way of broadcast or multicast.
  • the first intermediate node adds latency information of the first message at the first intermediate node in a first message from a target node
  • the method further includes: the first intermediate node receiving a synchronization request message, where the synchronization request message is used to request clock synchronization with the synchronization source node; The node forwards the synchronization request message; the first intermediate node receives a synchronization response message, where the synchronization response message is used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node; the first intermediate node forwards The synchronization response message.
  • the method further includes: the first intermediate node sends a fifth message, where the fifth message is used to indicate the first intermediate node and the The number of hops between the source nodes is synchronized, and the hop counts are used by other target nodes to determine whether to perform clock synchronization with the first intermediate node.
  • the first intermediate node is a terminal device or a relay node.
  • a communication processing apparatus for performing the method of the first aspect or any possible implementation of the first aspect.
  • the terminal device comprises means for performing the method of any of the above-mentioned first aspect or any of the possible implementations of the first aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.
  • the apparatus comprises means for performing the method of any of the possible implementations of the third aspect or the third aspect described above.
  • another communication processing apparatus comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • another communication processing apparatus comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • another communication processing apparatus comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the third aspect or the third aspect.
  • a communication processing system comprising: the device in any one of the possible implementations of the third aspect or the third aspect, the fourth aspect or the fourth aspect, in any possible implementation manner And a device in any of the possible implementations of the fifth or fifth aspect; or
  • the system includes the apparatus of any one of the possible implementations of the sixth aspect or the sixth aspect, the apparatus of any one of the seventh aspect or the seventh aspect, and the eighth or eighth aspect A device in any of the possible implementations.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the first aspect or the first aspect described above A possible implementation.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the second aspect or the second aspect A possible implementation.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the third aspect or the third aspect described above A possible implementation.
  • a fourteenth aspect a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a fifteenth aspect a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the second aspect or the second aspect of the second aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of any of the third aspect or any of the possible implementations of the third aspect.
  • a chip system includes: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path
  • the processor is operative to execute code in the memory, the processor being operative to perform the method of any of the first aspect or the first aspect of the first aspect when the code is executed.
  • a chip system includes: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path
  • the processor is operative to execute code in the memory, the processor being operative to perform a method in any of the possible implementations of the second aspect or the second aspect described above when the code is executed.
  • a chip system includes: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path
  • the processor is operative to execute code in the memory, the processor being operative to perform a method in any of the possible implementations of the third aspect or the third aspect described above when the code is executed.
  • FIG. 1 shows a schematic diagram of a communication system of an embodiment of the present application.
  • FIG. 2 shows a schematic flow chart of a communication processing method according to an embodiment of the present application.
  • FIG. 3 shows a schematic flow chart of another communication processing method according to an embodiment of the present application.
  • FIG. 4 shows a schematic flow chart of another communication processing method according to an embodiment of the present application.
  • FIG. 5 shows a schematic flow chart of another communication processing method according to an embodiment of the present application.
  • FIG. 6 shows a schematic flow chart of another communication processing method according to an embodiment of the present application.
  • FIG. 7 shows a schematic block diagram of a communication processing apparatus according to an embodiment of the present application.
  • FIG. 8 shows a schematic block diagram of another communication processing apparatus in accordance with an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD Time division duplex
  • FIG. 1 shows a communication system 100 to which an embodiment of the present application is applied.
  • the communication system 100 can include at least one base station 110, at least one terminal device 120, and at least one relay node 130.
  • the base station 110 may be an evolved base station (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN), or a base station in a future 5G network.
  • eNB evolved base station
  • CRAN cloud radio access network
  • NG-RAN nodes can be collectively referred to as a new generation of radio access network nodes (NG-RAN nodes), including gNB, NG-eNB, central unit (CU) and distributed unit (DU) separated form gNB, etc.
  • NG-RAN nodes including gNB, NG-eNB, central unit (CU) and distributed unit (DU) separated form gNB, etc.
  • BBU baseband unit
  • the terminal device 120 can be mobile or fixed.
  • the terminal device 120 may refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user. Agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Functional handheld devices computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, customer premise equipment (CPE), residential gateway (RG), terminals in future 5G networks
  • CPE customer premise equipment
  • RG residential gateway
  • terminals in future 5G networks A device or a terminal device in a public land mobile network (PLMN) that is evolving in the future.
  • PLMN public land mobile network
  • relay node 130 may be a network device, or may be a terminal device, for example, a customer premise equipment (CPE), a residential gateway (RG), a UE, or the like, or may be a wireless backhaul.
  • CPE customer premise equipment
  • RG residential gateway
  • UE User Equipment
  • the wireless backhaul node is configured to provide a wireless backhaul service for a node (e.g., a terminal) that wirelessly accesses the wireless backhaul node.
  • the wireless backhaul node may be a wireless backhaul node in a 5G network.
  • a wireless backhaul node in a 5G network may be referred to as an integrated access and backhaul (IAB) node.
  • IAB integrated access and backhaul
  • a relay node In a wireless relay networking scenario, a relay node (RN) is connected to a donor base station (donor gNodeB, DgNB) through a wireless backhaul link, and the DgNB can be connected to the core network through a wired backhaul link; further
  • some relay nodes will connect to the host base station through a multi-hop wireless link.
  • the relay node and the host base station have a certain hierarchical relationship, and each relay node will provide it back.
  • the node transmitting the service is regarded as a parent node. For example, as shown in FIG.
  • the base station 110 to the terminal device 120 are sequentially referred to as RN 1, RN 2, and RN.
  • the uplink data packet served by the RN 3 to the terminal device 120 will be transmitted to the RN 2 via the RN 3, then to the RN 1 via the RN 2, to the base station 110 by the RN 1, and finally to the mobile gateway by the base station 110.
  • the device, the downlink data packet will be received by the base station 110 from the mobile gateway device, and then transmitted to the terminal device 120 through the RN 1, the RN 2 and the RN 3 in sequence.
  • the relay node 130 is an IAB node
  • the above-mentioned host base station may also be referred to as an IAB donor.
  • the IAB node can provide wireless access services for the terminal and connect to the IAB donor to transmit the user's service data through the wireless backhaul link.
  • the IAB donor may be a complete entity, or may be a separate form of the CU and the DU, that is, a centralized unit (donor-CU) and a distributed unit (donor-DU), which are not limited in this embodiment of the present application.
  • FIG. 1 exemplarily shows one base station, one terminal device and three relay nodes.
  • the communication system 100 may include a plurality of base stations and each of the base stations may include other numbers of terminal devices within the coverage and Other embodiments of the relay node are not limited in this embodiment.
  • the wireless communication system 100 may further include other network elements or network entities, such as an access management function unit, a session management function unit, and a user plane function unit.
  • network elements or network entities such as an access management function unit, a session management function unit, and a user plane function unit.
  • the embodiment of the present application is not limited thereto.
  • the host base station can be configured with a global positioning system (GPS) device, and synchronizes with the network by receiving the GPS signal. Therefore, the base station can be used as the synchronization source node, and the relay node can be synchronized through the air interface.
  • the mode is clock synchronized with the synchronization source node.
  • GPS global positioning system
  • the node selected as the clock synchronization reference (for example, a node with GPS synchronization capability, ie a node capable of network synchronization by receiving GPS signals) is called a synchronization source node and will need to be clocked with the synchronization source node.
  • the node is called a target node, and the node that assists the synchronization information transmission between the target node and the synchronization source node is called an intermediate node.
  • the target node and the intermediate node may be the foregoing relay node, or may be the foregoing terminal device, which is not limited in this embodiment of the present application.
  • the synchronization source node may be the foregoing relay node, or may be the foregoing base station, which is not limited in this embodiment of the present application.
  • the following takes the node between the target node and the synchronization source node as the first intermediate node as an example. Be explained.
  • FIG. 2 shows a schematic flowchart of a communication processing method 200 of an embodiment of the present application.
  • the method 200 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the target node sends a first message to the synchronization source node by using the first intermediate node, where the target node records a sending time of the first message.
  • the first intermediate node receives the first message, and adds, in the first message, waiting time information of the first message at the first intermediate node;
  • the first intermediate node sends the first message to the synchronization source node.
  • the synchronization source node receives the first message sent by the target node by using the first intermediate node, and sends a second message to the target node by using the first intermediate node, where the second message carries the second message. Determining a reception time of the first message at the synchronization source node and waiting time information of the first message at the first intermediate node;
  • the first intermediate node receives the second message, and sends the second message to the target node.
  • the target node receives the second message sent by the synchronization source node by using the first intermediate node, and according to the sending time of the first message at the target node and the second message. Time information determining a clock offset between the target node and the synchronization source node.
  • the target node may send a first message whose destination address is the address of the synchronization source node, and record the sending time of the first message.
  • the first message passes through the first intermediate node, and the first intermediate node adds the waiting time information of the first message at the first intermediate node in the first message, and then sends the first message.
  • the synchronization source node receives the first message, records the reception time of the first message, and then sends a second message whose destination address is the address of the target node.
  • the first message received by the synchronization source node carries the waiting time information of the first message added by the first intermediate node at the first intermediate node, and therefore, the synchronization source node receives the first message.
  • the waiting time information of the first message at the first intermediate node is carried together in the second message.
  • the second message arrives at the target node by using the first intermediate node, and the target node may be based on the previously recorded time of sending the first message at the target node, the receiving time of the first message at the synchronization source node, and the first message is
  • the latency information at the intermediate node determines the clock skew between the target node and the synchronization source node.
  • the target node may further adjust the clock of the target node according to the obtained clock deviation, so that the target node maintains clock synchronization with the synchronization source node.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the foregoing waiting time information may include a time when the first intermediate node receives the first message and a time when the first intermediate node sends the first message, and may also include a time when the first intermediate node sends the first message.
  • the difference between the time when the first intermediate node receives the first message is not limited by the embodiment of the present application.
  • the source address of the first message is the address of the target node
  • the destination address is the address of the synchronization source node
  • the source address of the second message is the address of the synchronization source node
  • the destination address is the address of the target node
  • the first intermediate The node can forward the received message according to the routing protocol.
  • the target node and the synchronization source node may display corresponding fields carrying the source address and the destination address in the sent message, or may be in an implicit manner (for example, a channel, a bearer, or a special message type, etc.).
  • the source address and the destination address of the sent message are not limited in this embodiment of the present application.
  • the processing process of the message by the intermediate node merely adds the waiting time information, the other content of the message does not change.
  • the first message received by the first intermediate node is added by the first intermediate node. After the time information, it is still referred to as the first message, and the subsequent second message and the third message are similar, and will not be described again.
  • the foregoing first message may be a delay request
  • the second message may be a Delay response, but the embodiment of the present application does not limit this.
  • the foregoing node determines the sending time of the message, which may be based on a physical layer frame or a subframe sent by the node.
  • the start time or the end time indicates the sending time of the message; similarly, the node determines the receiving time of the message according to the start time or end time of the physical layer frame or subframe received by the node. Indicates the time the message was received.
  • the target node may send multiple first messages to the synchronization source node, and the first intermediate node may select one of the first messages to add waiting time information, and notify the selected first message.
  • the target node so that the target node can subsequently calculate the clock between the target node and the synchronization source node according to the sending time of the first message selected by the first intermediate node and the time information in the received second message. deviation.
  • the second message further carries a sending time of the second message at the synchronization source node and waiting time information of the second message at each intermediate node;
  • the method further includes:
  • Determining, by the target node, a clock offset between the target node and the synchronization source node according to a sending time of the first message at the target node and time information in the second message including:
  • the synchronization source node may record the sending time of the second message, and carry the sending time of the second message in the second message.
  • the first intermediate node receives the second message sent by the synchronization source node, where the second message carries the sending time of the first message, the receiving time of the first message, the waiting time information of the first message at the intermediate node, and the The time when the second message was sent.
  • the first intermediate node may add waiting time information of the second message at the first intermediate node in the second message, and send the second message.
  • the target node receives the second message and records the receiving time of the second message.
  • the target node may be configured according to the sending time of the first message, the receiving time of the first message, the waiting time information of the first message at the intermediate node, the sending time of the second message, and the second message.
  • the waiting time information at the first intermediate node and the receiving time of the second message determine a clock offset between the target node and the synchronization source node.
  • the determining a clock offset between the target node and the synchronization source node includes:
  • the target node determines a clock offset between the target node and the synchronization source node according to the following formula:
  • T 4 is a receiving time of the second message at the target node
  • T 3 is a sending time of the second message at the synchronization source node
  • T 2 is the first message in the The receiving time at the synchronization source node
  • T 1 is the transmission time of the first message at the target node
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • j is used for a label indicating the at least one intermediate node
  • j 1, . . . , N
  • T j (wd) is a waiting time of the second message at the intermediate node j
  • T j (wu) is the first The waiting time of the message at the intermediate node j.
  • the wd represents the waiting downlink
  • the wu represents the waiting uplink
  • the sending of the message by the target node to the synchronization source node is referred to as uplink
  • the sending of the message by the synchronization source node to the target node is referred to as downlink transmission. (downlink).
  • T is the clock deviation of the target node relative to the synchronization source node
  • the distance between the T i (p) and the ith hop link between the nodes is related to the transmission rate of the electromagnetic wave. Therefore, in the embodiment of the present application, the first message from the target node to the synchronization source node can be considered as being on each hop link.
  • the sum of the transmission delays is the same as the sum of the transmission delays of the second messages from the synchronization source node to the destination node on each hop link.
  • the at least one intermediate node described above includes a first intermediate node.
  • the method before the synchronization source node receives the first message sent by the target node by using the at least one intermediate node, the method further includes:
  • the synchronization source node sends a third message to the target node by using the at least one intermediate node, where the third message carries a sending time of the third message at the synchronization source node;
  • the method further includes:
  • the first intermediate node adds, in the third message, waiting time information of the third message at the first intermediate node;
  • the method Before the sending, by the at least one intermediate node, the first message to the synchronization source node, the method further includes:
  • Determining, by the target node, a clock offset between the target node and the synchronization source node according to a sending time of the first message at the target node and time information in the second message including:
  • the target node is configured according to a sending time of the first message at the target node, time information in the second message, a receiving time of the third message at the target node, and the third message. Time information in the determination of a clock offset between the target node and the synchronization source node.
  • the synchronization source node may record the sending time of the third message, and carry the sending time of the third message in the third message for sending.
  • the first intermediate node receives the third message, and adds, in the third message, waiting time information of the third message at the first intermediate node, where the first intermediate node sends the third message.
  • the target node receives the third message and records the receiving time of the third message.
  • the third message received by the target node carries the sending time of the third message at the synchronization source node and the waiting time information of the third message at the first intermediate node.
  • the target node After receiving the third message, the target node sends a first message whose destination address is the synchronization source node, and records the sending time of the first message.
  • the first message passes through the first intermediate node, and the first intermediate node adds the waiting time information of the first message at the first intermediate node in the first message, and then sends the first message.
  • the synchronization source node receives the first message, records the reception time of the first message, and then sends a second message whose destination address is the address of the target node.
  • the first message received by the synchronization source node carries the waiting time information of the first message added by the first intermediate node at the first intermediate node, and therefore, the synchronization source node receives the first message. And the waiting time information of the first message at the first intermediate node is carried together in the second message to be sent to the target node.
  • the second message arrives at the target node by using the first intermediate node, and the target node may be based on the previously sent time of the first message, the sending time of the third message at the synchronization source node, and the third message at the target
  • the foregoing third message may be a Sync notification, but the embodiment of the present application does not limit this.
  • the third message may be sent by the synchronization source node periodically, or may be triggered by the event triggering synchronization source node, for example, the synchronization source node sends the third message after receiving the synchronization request of the target node.
  • the information in the embodiment of the present application is not limited thereto.
  • the determining a clock offset between the target node and the synchronization source node includes:
  • the target node determines a clock offset between the target node and the synchronization source node according to the following formula:
  • T 6 is a receiving time of the third message at the target node
  • T 5 is a sending time of the third message at the synchronization source node
  • T 2 is the first message in the The receiving time at the synchronization source node
  • T 1 is the transmission time of the first message at the target node
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • T j (wu) is the waiting time of the first message at the intermediate node j.
  • T is the clock deviation of the target node relative to the synchronization source node
  • the distance from the i-hop link between the nodes is related to the transmission rate of the electromagnetic wave. Therefore, in the embodiment of the present application, the sum of the transmission delays of the first message from the target node to the synchronization source node on each hop link can be considered.
  • the sum of the transmission delays on the hop links is the same as the third message from the synchronization source node to the destination node.
  • the third message is sent by the synchronization source node and the at least one intermediate node by means of broadcast or multicast.
  • the foregoing third message may be that the synchronization source node and the first intermediate node are sent by means of broadcast or multicast, which can further reduce signaling overhead between sites.
  • the method further includes:
  • the node that is the clock synchronization reference is clocked with it.
  • the first intermediate node sends a fifth message, where the fifth message is used to indicate a hop count between the first intermediate node and the synchronization source node that can be used as a reference reference, and the hop count is used for other targets.
  • the node determines whether the first intermediate node is selected as a clock synchronization reference node to be clocked with.
  • the synchronization source node that can be used as a reference reference may be a node with GPS synchronization capability, or a node that is synchronized with the transmission network through the IEEE 1588 protocol, and the like.
  • the foregoing target node sends the fourth message, which may be sent by means of broadcast or multicast or unicast, which is not limited in this embodiment of the present application.
  • the first intermediate node sends the fifth message, which may be sent by means of broadcast or multicast or unicast, which is not limited in this embodiment of the present application.
  • all nodes in the network can transmit the hop count between themselves and the synchronization source node that can be used as a reference for other nodes (other target nodes) that need to perform clock synchronization, and select a synchronization source.
  • other target nodes may select a node with the smallest hop count as a synchronization source, and perform clock synchronization with the node with the smallest hop count.
  • the method before the target node receives the second message sent by the synchronization source node by using the at least one intermediate node, the method further includes:
  • the target node sends a synchronization request message to the synchronization source node by using the at least one intermediate node, where the synchronization request message is used by the target node to perform clock synchronization with the synchronization source node;
  • the synchronization node sends a synchronization response message sent by the synchronization source node by using the at least one intermediate node, where the synchronization response message is used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node.
  • the method further includes:
  • the synchronization source node sends a synchronization response message to the target node by using the at least one intermediate node according to the synchronization request message, where the synchronization response message is used to indicate that the synchronization source node accepts or rejects the target node. Synchronize the request.
  • the method further includes:
  • the first intermediate node receives a synchronization request message, where the synchronization request message is used by the target node to perform clock synchronization with the synchronization source node;
  • the first intermediate node forwards the synchronization request message
  • the first intermediate node receives a synchronization response message, where the synchronization response message is used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node;
  • the first intermediate node forwards the synchronization response message.
  • the target node may send a synchronization request message to the synchronization source node through at least one intermediate node, requesting clock synchronization with the synchronization source node.
  • the synchronization request message is forwarded by at least one intermediate node including the first intermediate node.
  • the synchronization source node receives the synchronization request message, and the synchronization source node determines whether to agree to be the synchronization source of the target node, and the synchronization source node sends a synchronization response message to the target node through at least one intermediate node. At least one intermediate node including the first intermediate node forwards the synchronization response message.
  • the target node Receiving, by the target node, the synchronization response message, if the synchronization response message indicates that the synchronization source node accepts the synchronization request of the target node, the target node sends a first message to the synchronization source node, or the synchronization source node Sending a third message to the target node.
  • the first intermediate node is a terminal device or a relay node.
  • FIG. 3 is a schematic flowchart of another communication processing method 300 of the embodiment of the present application.
  • the method 300 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the third relay node is a target node
  • the second relay node and the first relay node are intermediate nodes
  • the base station is a synchronization source node.
  • the third relay node sends a synchronization request message to the base station by using the second relay node and the first relay node, where the synchronization request message is used to request clock synchronization with the base station.
  • the base station receives the synchronization request message sent by the third relay node, and sends a synchronization response message to the third relay node by using the first relay node and the second relay node, where the synchronization response message is used to indicate that the base station receives
  • the synchronization request of the third relay node that is, the base station agrees to be the synchronization source of the third relay node.
  • the base station transmits a third message to a third node via a first relay and a second relay node relay node, the third message may include sending a message to the third time T 5.
  • the third message may further include at least one of the identifier information of the third relay node and the identifier information of the base station.
  • the third message can be a Sync notification message.
  • the third message may be sent by the base station periodically, or may be triggered by an event.
  • the base station may send the third message according to the synchronization request message of the third relay node, which is not limited in this embodiment of the present application.
  • the first relay node receives the third message, and adds the waiting time information of the third message at the first relay node in the third message.
  • the time when the first relay node receives the third message is The time to send the third message is The waiting period of the third message at the first relay node is
  • the first relay node adds the waiting time information of the third message at the first relay node, which may be added. with Can also be added This embodiment of the present application does not limit this.
  • the first relay node sends the third message to the second relay node.
  • the second relay node receives the third message sent by the first relay node, and adds the waiting time information of the third message at the second relay node in the third message.
  • the time that the second relay node receives the third message is The time to send the third message is The waiting period of the third message at the first relay node is
  • the second relay node adds the waiting time information of the third message at the second relay node, which may be added. with Can also be added This embodiment of the present application does not limit this.
  • the second relay node sends the third message to the third relay node.
  • the third message in S308, the third relay node receives the transmission of the second relay node, recording the third message reception time T 6, and transmits to the base station through a first relay node and a second node of the first relay A message recording the transmission time T 1 of the first message.
  • the first message may be a Delay request message.
  • the first message sent by the third relay node may include at least one of the following information: a sending time T 1 of the first message at the third relay node, identification information of the third relay node, and the base station. Identification information.
  • the second relay node receives the first message sent by the third relay node, and adds the waiting time information of the first message to the second relay node in the first message.
  • the time when the second relay node receives the first message is T 2 (ru)
  • the time when the first message is sent is T 2 (tu) , where the first message is at the second relay node. Waiting time period is
  • the second relay node adds the waiting time information of the first message at the second relay node, and may add T 2 (ru) and T 2 (tu) , or may add T 2 (wu) ,
  • the application embodiment does not limit this.
  • the second relay node sends the first message to the first relay node.
  • the first relay node receives the first message sent by the second relay node, and adds waiting time information of the first message at the first relay node in the first message.
  • the time when the first relay node receives the first message is T 1 (ru)
  • the time when the first message is sent is T 1 (tu) , where the first message is at the first relay node. Waiting time period is
  • T 1 (wu) T 1 (tu) -T 1 (ru)
  • the first relay node adds the waiting time information of the first message at the first relay node, and may add T 1 (ru) and T 1 (tu) , or may add T 1 (wu) , The application embodiment does not limit this.
  • the first relay node sends the first message to the base station.
  • the base station receives the first message sent by the first relay node, records the receiving time T 2 of the first message, and sends the first relay node and the second relay node to the third relay node.
  • the second message may be a Delay response message.
  • the second message carries the receiving time T 2 of the first message at the base station and the waiting time information of the first message at the intermediate node, that is, the waiting period T j of the first message at the intermediate node ( Wu) (including T 1 (wu) and T 2 (wu) above ) or ⁇ T j (ru) , T j (tu) ⁇ added by the intermediate node, j is the label of the intermediate node, which is an integer greater than or equal to 1. .
  • the second message may further carry at least one of the identifier information of the base station and the identifier information of the third relay node, which is not limited in this embodiment of the present application.
  • the first relay node receives the second message, and sends the second message to the second relay node.
  • the second relay node receives the second message, and sends the second message to the third relay node.
  • the third relay node receives the second message and determines a clock offset.
  • the third relay node may calculate a clock offset between the third relay node and the base station according to the following formula:
  • the third relay node subtracts T from the current clock value to implement clock synchronization between the third relay node and the base station.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • FIG. 4 shows a schematic flowchart of another communication processing method 400 of an embodiment of the present application.
  • the method 400 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the third relay node is a target node
  • the second relay node and the first relay node are intermediate nodes
  • the base station is a synchronization source node.
  • the third relay node sends a synchronization request message to the base station by using the second relay node and the first relay node, where the synchronization request message is used to request synchronization with the clock of the base station.
  • the base station receives the synchronization request message sent by the third relay node, and sends a synchronization response message to the third relay node by using the first relay node and the second relay node, where the synchronization response message is used to indicate that the base station accepts
  • the synchronization request of the third relay node that is, the base station agrees to be the synchronization source of the third relay node.
  • the third relay through the second relay node sends the first node and the relay node to the base station a first message
  • the first message may be carried in the first message transmission time of T 1
  • the The first message may further carry at least one of the identifier information of the third relay node and the identifier information of the base station.
  • the first message may be a Delay request message.
  • the second relay node receives the first message, and adds waiting time information of the first message at the second relay node in the first message.
  • the time when the second relay node receives the first message is T 2 (ru)
  • the time when the first message is sent is T 2 (tu) , where the first message is at the second relay node. Waiting time period is
  • the second relay node adds the waiting time information of the first message at the second relay node, and may add T 2 (ru) and T 2 (tu) , or may add T 2 (wu) ,
  • the application embodiment does not limit this.
  • the second relay node sends the first message to the first relay node.
  • the first relay node receives the first message sent by the second relay node, and adds, in the first message, waiting time information of the first message at the first relay node.
  • the time when the first relay node receives the first message is T 1 (ru)
  • the time when the first message is sent is T 1 (tu) , where the first message is at the first relay node. Waiting time period is
  • T 1 (wu) T 1 (tu) -T 1 (ru)
  • the first relay node adds the waiting time information of the first message at the first relay node, and may add T 1 (ru) and T 1 (tu) , or may add T 1 (wu) , The application embodiment does not limit this.
  • the first relay node sends the first message to the base station.
  • the base station receives the first message sent by the first relay node, records the receiving time T 2 of the first message, and sends the first relay node and the second relay node to the third relay node.
  • the second message, the base station records the sending time T 3 of the second message, and the second message may be a Delay response message.
  • the second message carries the sending time T 3 of the second message at the base station, the receiving time T 2 of the first message at the base station, and the waiting time information of the first message at the intermediate node, that is, the first message a waiting period T j (wu) of a message at an intermediate node (including T 1 (wu) and T 2 (wu) above ) or ⁇ T j (ru) , T j (tu) ⁇ , j added by an intermediate node
  • the label of the intermediate node is an integer greater than or equal to 1.
  • the second message may further carry at least one of the identifier information of the third relay node and the identifier information of the base station, which is not limited in this embodiment of the present application.
  • the first relay node receives the second message, and adds the waiting time information of the second message at the first relay node in the second message.
  • the time when the first relay node receives the second message is T 1 (rd)
  • the time when the second message is sent is T 1 (td) , where the second message is at the first relay node. Waiting time period is
  • T 1 (wd) T 1 (td) - T 1 (rd)
  • the first relay node adds the waiting time information of the second message at the first relay node, and may add T 1 (rd) and T 1 (td) , or may add T 1 (wd) ,
  • the application embodiment does not limit this.
  • the first relay node sends the second message to the second relay node.
  • the second relay node receives the second message sent by the first relay node, and adds the waiting time information of the second message at the second relay node in the second message.
  • the time when the second relay node receives the second message is T 2 (rd)
  • the time when the second message is sent is T 2 (td) , where the second message is at the first relay node. Waiting time period is
  • T 2 (wd) T 2 (td) - T 2 (rd)
  • the second relay node adds the waiting time information of the second message at the second relay node, and may add T 2 (rd) and T 2 (td) , or may add T 2 (wd) ,
  • the application embodiment does not limit this.
  • the second relay node sends the second message to the third relay node.
  • the third relay node receives the second message, records the receiving time T 4 of the second message, and determines a clock offset.
  • the third relay node may calculate a clock offset between the third relay node and the base station according to the following formula:
  • the third relay node subtracts T from its current clock value to achieve clock synchronization between the third relay node and the base station.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the embodiment of the present application can implement clock synchronization by transmitting two messages, and reduce signaling interaction between the target node and the synchronization source node.
  • FIG. 5 shows a schematic flowchart of another communication processing method 500 of an embodiment of the present application.
  • the method 500 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the relay node is a target node
  • the terminal device is an intermediate node
  • the base station is a synchronization source node.
  • the relay node sends a synchronization request message to the base station through the terminal device, and the synchronization request message is used by the relay node to request synchronization with the clock of the base station.
  • the base station receives the synchronization request message sent by the relay node by using the terminal device, and sends a synchronization response message to the relay node by using the terminal device, where the synchronization response message is used to indicate that the base station receives the synchronization request of the relay node, that is, the base station agrees.
  • the synchronization response message is used to indicate that the base station receives the synchronization request of the relay node, that is, the base station agrees.
  • the synchronization source of the relay node As the synchronization source of the relay node.
  • the base station transmits a third message to a relay node by the terminal device, the third message may include sending a message to the third time T 5.
  • the third message may further include at least one of the identifier information of the relay node and the identifier information of the base station.
  • the third message is a Sync notification message.
  • the third message may be sent by the base station periodically, or may be triggered by an event.
  • the base station may send the third message according to the synchronization request message of the received relay node, which is not limited in this embodiment of the present application.
  • the terminal device receives the third message, and adds the waiting time information of the third message at the terminal device in the third message.
  • the time when the terminal device receives the third message is T 1 (rd)
  • the time for sending the third message is The waiting period of the third message at the terminal device.
  • the terminal device adds the waiting time information of the third message at the first relay node, and may add T 1 (rd) and T 1 (td) , and may also add T 1 (wd) . This is not limited.
  • the terminal device sends the third message to the relay node.
  • the relay node receives the third message sent by the terminal device, the third record message reception time T 6, and the base station transmits a first message to the terminal device, the relay node sends the recording time of a first message T 1 .
  • the first message may be a Delay request message.
  • the first message sent by the relay node may include at least one of the following information: a sending time T 1 of the first message at the relay node, identification information of the relay node, and identification information of the base station.
  • the terminal device receives the first message, and adds waiting time information of the first message at the terminal device in the first message.
  • the time when the terminal device receives the first message is T 1 (ru)
  • the time when the first message is sent is T 1 (tu)
  • the waiting period of the first message at the terminal device is
  • T 1 (wu) T 1 (tu) -T 1 (ru)
  • the terminal device adds the waiting time information of the first message at the terminal device, and may add T 1 (ru) and T 1 (tu) , or may add T 1 (wu) , which is not used in this embodiment of the present application. limited.
  • the terminal device sends the first message to the base station.
  • the base station receives the first message sent by the terminal device, records the receiving time T 2 of the first message, and sends a second message to the relay node by using the terminal device, where the second message may be a Delay response message.
  • the second message carries the receiving time T 2 of the first message at the base station and the waiting time information of the first message at the intermediate node, that is, the waiting period T j of the first message at the intermediate node ( Wu) (including the above T 1 (wu) ) or ⁇ T j (ru) , T j (tu) ⁇ added by the intermediate node, j is a label of the intermediate node, and is an integer greater than or equal to 1.
  • the second message may further carry at least one of the identifier information of the base station and the identifier information of the third relay node, which is not limited in this embodiment of the present application.
  • the terminal device receives the second message, and sends the second message to the relay node.
  • the relay node receives the second message and determines a clock offset.
  • the relay node may calculate a clock offset between the relay node and the base station according to the following formula:
  • the relay node subtracts T from the current clock value to achieve clock synchronization between the relay node and the base station.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • synchronization between sites is beneficial to reduce interference.
  • FIG. 6 shows a schematic flowchart of another communication processing method 600 of the embodiment of the present application.
  • the method 600 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the relay node is a target node
  • the terminal device is an intermediate node
  • the base station is a synchronization source node.
  • the relay node sends a synchronization request message to the base station through the terminal device, where the synchronization request message is used by the relay node to synchronize with the clock of the base station.
  • the base station receives the synchronization request message sent by the relay node by using the terminal device, and sends a synchronization response message to the relay node by using the terminal device, where the synchronization response message is used to indicate that the base station accepts the synchronization request of the relay node, that is, the base station Agree as the synchronization source for this relay node.
  • the relay node sends a first message to the base station by the terminal apparatus, the first relay node records the message transmission time T 1.
  • the first message may carry at least one of the following information: a time T 1 at which the relay node sends the first message, identification information of the relay node, and identifier information of the base station.
  • the first message may be a Delay request message.
  • the terminal device receives the first message, and adds waiting time information of the first message to the terminal device in the first message.
  • the time when the terminal device receives the first message is T 1 (ru)
  • the time when the first message is sent is T 1 (tu)
  • the waiting period of the first message at the terminal device is
  • T 1 (wu) T 1 (tu) -T 1 (ru)
  • the terminal device adds the waiting time information of the first message at the terminal device, and may add T 1 (ru) and T 1 (tu) , or may add T 1 (wu) , which is not used in this embodiment of the present application. limited.
  • the terminal device sends the first message to the base station.
  • the base station receives the first message, records the receiving time T 2 of the first message, and sends a second message to the relay node by using the terminal device, where the base station records the sending time T 3 of sending the second message, where the base station records
  • the second message may be a Delay response message.
  • the second message carries the sending time T 3 of the second message at the base station, the receiving time T 2 of the first message at the base station, and the waiting time information of the first message at the terminal device, that is, the first message a waiting period T j (wu) of a message at the terminal device (including the above T 1 (wu) ) or ⁇ T j (ru) , T j (tu) ⁇ added by the terminal device, j is a label of the intermediate node, Is an integer greater than or equal to 1.
  • the second message may further carry at least one of the identifier information of the relay node and the identifier information of the base station, which is not limited in this embodiment of the present application.
  • the terminal device receives the second message, and adds waiting time information of the second message at the terminal device in the second message.
  • the time when the terminal device receives the second message is T 1 (rd)
  • the time for sending the second message is T 1 (td)
  • the waiting period of the second message at the terminal device is
  • T 1 (wd) T 1 (td) - T 1 (rd)
  • the terminal device adds the waiting time information of the second message at the terminal device, and may add T 1 (rd) and T 1 (td) , and may also add T 1 (wd) , which is not used in this embodiment of the present application. limited.
  • the terminal device sends the second message to the relay node.
  • the relay node receives the second message, records the receiving time T 4 of the second message, and determines a clock offset.
  • the relay node may calculate a clock offset between the relay node and the base station according to the following formula:
  • the third relay node subtracts T from its current clock value to achieve clock synchronization between the relay node and the base station.
  • the intermediate node adds latency information to the message transmitted between the target node and the synchronization source node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the embodiment of the present application can implement clock synchronization by transmitting two messages, and reduce signaling interaction between the target node and the synchronization source node. In the embodiment of the present application, for a terminal device that can simultaneously receive data sent by the synchronization source node and the target node, synchronization between the stations is beneficial to reduce interference.
  • the communication processing method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 6.
  • the communication processing apparatus according to the embodiment of the present application will be described in detail below with reference to FIG. 7 to FIG.
  • FIG. 7 shows a communication processing apparatus 700 provided by an embodiment of the present application.
  • the apparatus 700 includes a transceiver unit 710 and a processing unit 720.
  • the device 700 may be specifically the target node in the foregoing embodiment, and the device 700 may be used to perform various processes and/or steps corresponding to the target node in the foregoing method embodiment.
  • the transceiver unit 710 is configured to receive a second message sent by the synchronization source node by using at least one intermediate node, where the second message carries a reception time of the first message from the device at the synchronization source node. Waiting time information of the first message at each of the at least one intermediate node;
  • the processing unit 720 is configured to determine a clock offset between the device and the synchronization source node according to a sending time of the first message at the device and time information in the second message.
  • the communication processing apparatus of the embodiment of the present application adds latency information to the message transmitted between the target node and the synchronization source node by the intermediate node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the second message further carries a sending time of the second message at the synchronization source node and waiting time information of the second message at each intermediate node;
  • the processing unit The 720 is specifically configured to: determine, according to a sending time of the first message at the device, a receiving time of the second message at the device, and time information in the second message, the device and the device The clock skew between the synchronization source nodes.
  • the processing unit 720 is specifically configured to determine a clock offset between the device and the synchronization source node according to the following formula:
  • T 4 is a receiving time of the second message at the device
  • T 3 is a sending time of the second message at the synchronization source node
  • T 2 is a synchronization of the first message in the synchronization
  • the receiving time at the source node T 1 is the transmission time of the first message at the device
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • T j (wd) is a waiting time of the second message at the intermediate node j
  • T j (wu) is the first message The waiting time at the intermediate node j.
  • the transceiver unit 710 is further configured to: before sending the first message to the synchronization source node by using the at least one intermediate node, receive a third message sent by the synchronization source node by using the at least one intermediate node, where The third message carries the sending time of the third message at the synchronization source node and the waiting time information of the third message at each intermediate node; the transceiver unit 710 is further configured to: according to the The third message, the first message is sent to the synchronization source node by using the at least one intermediate node; the processing unit 720 is specifically configured to: according to the sending time and location of the first message at the device Determining a clock offset between the device and the synchronization source node, the time information in the second message, the reception time of the third message at the device, and the time information in the third message.
  • the processing unit 720 is specifically configured to determine a clock offset between the device and the synchronization source node according to the following formula:
  • T 6 is the receiving time of the third message at the device
  • T 5 is the sending time of the third message at the synchronization source node
  • T 2 is the synchronization of the first message.
  • the receiving time at the source node T 1 is the transmission time of the first message at the device
  • the number of the at least one intermediate node is N
  • N is an integer greater than or equal to 1
  • T j (wu) is the waiting time of the first message at the intermediate node j.
  • the transceiver unit 710 is further configured to send a synchronization request message to the synchronization source node by using the at least one intermediate node before receiving the second message sent by the synchronization source node by using the at least one intermediate node, where The synchronization request message is used to request clock synchronization with the synchronization source node; the transceiver unit 710 is further configured to: receive a synchronization response message sent by the synchronization source node by using the at least one intermediate node, where the synchronization response message is used by Representing the synchronization source node accepting or rejecting the synchronization request of the device.
  • the third message is sent by using the broadcast source or the at least one intermediate node in a broadcast or multicast manner.
  • the transceiver unit 710 is further configured to: send a fourth message, where the fourth message is used to indicate a hop count between the device and the synchronization source node, where the hop count is used by other devices to determine Whether to synchronize the clock with the device.
  • the apparatus 700 may be specifically the synchronization source node in the foregoing embodiment, and the apparatus 700 may be used to perform various processes and/or steps corresponding to the synchronization source node in the foregoing method embodiment.
  • the transceiver unit 710 is configured to receive a first message sent by the target node by using the at least one intermediate node, where the first message carries a waiting for the first message at each of the at least one intermediate node. Time information; sending, by the at least one intermediate node, a second message to the target node according to the first message, where the second message carries a receiving time of the first message at the device and the The first message is latency information at each of the at least one intermediate node.
  • the communication processing apparatus of the embodiment of the present application adds latency information to the message transmitted between the target node and the synchronization source node by the intermediate node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • the second message further carries a sending time of the second message at the device.
  • the transceiver unit 710 is further configured to send, by the at least one intermediate node, a third message to the target node, by using the at least one intermediate node, before receiving the first message sent by the target node by using the at least one intermediate node.
  • the message carries the transmission time of the third message at the device.
  • the transceiver unit 710 is further configured to: before receiving the first message sent by the target node by using the at least one intermediate node, receiving a synchronization request message sent by the target node, where the synchronization request message is used for requesting The device performs clock synchronization; according to the synchronization request message, sending, by the at least one intermediate node, a synchronization response message to the target node, where the synchronization response message is used to indicate that the device accepts or rejects synchronization of the target node. request.
  • the third message is sent by the device by means of broadcast or multicast.
  • the device 700 may be specifically the first intermediate node in the foregoing embodiment, and the device 700 may be configured to perform various processes and/or steps corresponding to the first intermediate node in the foregoing method embodiment.
  • the processing unit 720 is configured to add, in the first message from the target node, waiting time information of the first message at the device;
  • the transceiver unit 710 is configured to send the first message, and receive a second message, where the second message carries a receiving time of the first message at the synchronization source node and the first message is in at least one middle Waiting time information at each intermediate node in the node, the at least one intermediate node including the device; transmitting the second message.
  • the communication processing apparatus of the embodiment of the present application adds latency information to the message transmitted between the target node and the synchronization source node by the intermediate node, so that the target node can be based on the sending time of the message, the receiving time, and the transmission process in the intermediate node.
  • the transmission delay calculates the clock deviation between the target node and the synchronization source node, and then performs clock adjustment, which can improve the accuracy of clock synchronization between nodes in the multi-hop wireless relay scenario, thereby improving system performance.
  • processing unit 720 is further configured to: add, in the second message, wait time information of the second message at the device before sending the second message.
  • the transceiver unit 710 is further configured to: before adding the waiting time information of the first message to the device in the first message from the target node, receive a third message, where The third message carries the sending time of the third message at the synchronization source node; the processing unit 720 is further configured to: add a waiting time of the third message at the device in the third message The transceiver unit 710 is further configured to: send the third message.
  • the third message is sent by the synchronization source node and the device by means of broadcast or multicast.
  • the transceiver unit 710 is further configured to: before adding the waiting information of the first message to the first intermediate node in the first message from the target node, receive a synchronization request message, where the synchronization The request message is used for requesting clock synchronization with the synchronization source node; forwarding the synchronization request message; receiving a synchronization response message, the synchronization response message being used to indicate that the synchronization source node accepts or rejects the synchronization request of the target node ; forwarding the synchronization response message.
  • the transceiver unit 710 is further configured to: send a fifth message, where the fifth message is used to indicate a hop count between the device and the synchronization source node, where the hop count is used for other target nodes. A determination is made as to whether or not to synchronize the clock with the device.
  • the device is a terminal device or a relay node.
  • the apparatus 700 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • processor eg, a shared processor, a proprietary processor, or a group
  • processors, etc. and memory, merge logic, and/or other suitable components that support the described functionality.
  • the above communication processing device may include a chip or a chip itself.
  • the chip can include a memory, a processor, and a communication interface, the processor and the memory being in communication with one another via internal connection paths, the processor for executing code in the memory, the processor for executing when the code is executed.
  • FIG. 8 shows another communication processing apparatus 800 provided by an embodiment of the present application.
  • the apparatus 800 includes a processor 810, a transceiver 820, and a memory 830.
  • the processor 810, the transceiver 820, and the memory 830 communicate with each other through an internal connection path.
  • the memory 830 is configured to store instructions, and the processor 810 is configured to execute instructions stored in the memory 830 to control the transceiver 820 to send signals and / or receive signals.
  • the device 800 may be specifically the target node in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the target node in the foregoing method embodiment.
  • the transceiver 820 is configured to receive a second message sent by the synchronization source node by using at least one intermediate node, where the second message carries a reception time of the first message from the device at the synchronization source node. Waiting time information of the first message at each of the at least one intermediate node; the processor 810 is configured to send a time according to the first message at the device and the second message Determining a clock offset between the device and the synchronization source node.
  • the device 800 may be specifically the synchronization source node in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the synchronization source node in the foregoing method embodiment.
  • the transceiver 820 is configured to receive a first message sent by the target node by using at least one intermediate node, where the first message carries a waiting at the intermediate node of the at least one intermediate node Time information; sending, by the at least one intermediate node, a second message to the target node according to the first message, where the second message carries a receiving time of the first message at the device and the The first message is latency information at each of the at least one intermediate node.
  • the apparatus 800 may be specifically the first intermediate node in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the first intermediate node in the foregoing method embodiment.
  • the processor 810 is configured to add, in a first message from the target node, latency information of the first message at the device; the transceiver 820 is configured to send the first message; receive a second message, where The second message carries the receiving time of the first message at the synchronization source node and the waiting time information of the first message at each intermediate node of the at least one intermediate node, the at least one intermediate node Including the device; transmitting the second message.
  • the memory 830 can optionally include read only memory and random access memory and provide instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 810 can be configured to execute instructions stored in a memory, and when the processor 810 executes instructions stored in the memory, the processor 810 is configured to perform the steps of the method embodiment corresponding to the first intermediate node And / or process.
  • the processor of the foregoing apparatus may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • the software unit can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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Abstract

本申请提供了一种通信处理方法和装置，该方法包括：目标节点接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述目标节点的第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息，确定所述目标节点与所述同步源节点之间的时钟偏差。本申请实施例的通信处理方法和装置，能够在多跳中继场景下实现时钟同步。

Description

通信处理方法和装置
本申请要求于2017年11月27日提交中国专利局、申请号为201711202769.1、申请名称为“通信处理方法和装置”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
本申请涉及通信领域，特别涉及通信领域中的通信处理方法和装置。
背景技术
随着通信技术的发展，通信系统对时钟同步的要求越来越严苛。对于时分双工(time division duplex，TDD)系统的基础业务而言，若相邻小区的基站间不能保持同步，则可能会产生严重的上下行链路干扰；对于一些需要基站间协作的技术，例如，多点协作(cooperative multi-point，COMP)、多播广播单频点网络(multicast-broadcast single-frequency network，MBSFN)等技术，对站点间同步的要求更严格。在第五代移动通信(5-generation，5G)技术中，引入了更宽的子载波设计(例如，15kHz，30KHz，60KHz，120KHz，240KHz等)，由于子载波宽度与子帧长度成反比，故子载波越宽，相应的保护间隔(guard Period，GP)和循环前缀(cyclic prefix，CP)越小，留给同步误差的余量也越小。因此，5G的空口(new radio，NR)对站点间同步的要求比现有的第四代移动通信系统及其他更高。
在有线网络中，例如互联网协议(internet protocol，IP)网络，常用的同步技术主要基于电气和电子工程师协会(institute of electrical and electronics engineers，IEEE)1588协议，其原理在于通过主从设备间带时间戳的IEEE 1588消息传递，利用精确的时间戳计算时间和频率偏移，达到主从频率和时间同步，精度可以达到微秒级。但是，该方法在多跳无线中继网络场景中，同步误差会逐跳传递。例如，一跳方案能实现1us的同步精度，经过3跳传输，站点间的同步精度将降至3us，同步精度会大大降低。因此，对于多跳组网的场景，逐跳同步的方案会导致网络能够支持的跳数有限。而跨跳同步的方案，待同步的目标节点仅需要与作为时钟源的同步源节点进行时钟同步，中间节点会作为透传节点，直接对数据进行转发，但是，这一方法假设数据在同步源节点与目标节点之间的往返时延相同，该假设会导致时钟同步的精度较低。对于无线中继组网的场景，尤其是有多跳中继的场景，如何提高时钟同步的精度是一项亟待解决的技术问题。
发明内容
本申请提供一种通信处理方法和装置，能够提高多跳中继场景中时钟同步的精度。
第一方面，提供了一种通信处理方法，包括：目标节点接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述目标节点的第一消息在所述同步 源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
应理解，上述等待时间信息可以包括该第一中间节点接收该第一消息的时间和该第一中间节点发送该第一消息的时间，也可以包括该第一中间节点发送该第一消息的时间与该第一中间节点接收到该第一消息的时间之差，本申请实施例对此不作限定。
还应理解，上述第一消息的源地址为目标节点的地址，目的地址为同步源节点的地址，第二消息的源地址为同步源节点的地址，目的地址为目标节点的地址，第一中间节点可以根据路由协议对接收到的消息进行转发。在具体实现中，目标节点和同步源节点可以在发送的消息中显示携带上述源地址和目的地址的相应字段，也可以通过隐式的方式(例如，信道、承载或特殊的消息类型等)来指示所发送的消息的源地址和目的地址，本申请实施例对此不作限定。
在本文中，由于中间节点对消息的处理过程仅仅是添加了等待时间信息，消息的格式及其他内容并未发生变化，为便于描述，第一中间节点接收的第一消息经过该第一中间节点添加等待时间信息之后，仍然将其称为第一消息，对于后面的第二消息和第三消息类似，不再赘述。
在一种具体的实现方式中，上述节点(例如，目标节点、中间节点、同步源节点)确定消息的发送时间，可以根据该节点发送的物理层帧(frame)或子帧(subframe)的起始时间或结束时间来表示该消息的发送时间；同理，上述节点确定消息的接收时间，可以根据该节点接收的物理层帧(frame)或子帧(subframe)的起始时间或结束时间来表示该消息的接收时间。
在一种可能的实现方式中，目标节点可以向同步源节点发送了多个第一消息，该第一中间节点可以选择其中一个第一消息添加等待时间信息，并将所选择的第一消息告知该目标节点，以便该目标节点后续可以根据该第一中间节点所选择的第一消息的发送时间，以及接收到的第二消息中的时间信息，计算该目标节点与同步源节点之间的时钟偏差。
结合第一方面，在第一方面的某些实现方式中，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间和所述第二消息在所述每个中间节点处的等待时间信息；所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息在所述目标节点处的接收时间以及所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
本申请实施例通过两个消息的传递即可实现时钟同步，减少了目标节点和同步源节点之间的信令交互。
具体地，同步源节点可以记录该第二消息的发送时间，并将该第二消息的发送时间携带在该第二消息中发送。第一中间节点接收同步源节点发送的第二消息，该第二消息携带 上述第一消息的发送时间、该第一消息的接收时间、该第一消息在中间节点处的等待时间信息以及该第二消息的发送时间。该第一中间节点可以在该第二消息中添加该第二消息在该第一中间节点处的等待时间信息，并发送该第二消息。目标节点接收第二消息，记录该第二消息的接收时间。在目标节点接收到的第二消息中，会携带该第一消息的接收时间、该第一消息在中间节点处的等待时间信息、该第二消息的发送时间以及该第二消息在该第一中间节点处的等待时间信息。因此，该目标节点可以根据该第一消息的发送时间、该第一消息的接收时间、该第一消息在中间节点处的等待时间信息、该第二消息的发送时间、该第二消息在该第一中间节点处的等待时间信息以及该第二消息的接收时间，确定该目标节点与该同步源节点之间的时钟偏差。
结合第一方面，在第一方面的某些实现方式中，所述确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据下列公式，确定所述目标节点与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000001
其中，T 4为所述第二消息在所述目标节点处的接收时间，T 3为所述第二消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述目标节点处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，T j (wd)为所述第二消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
结合第一方面，在第一方面的某些实现方式中，在所述目标节点通过至少一个中间节点向同步源节点发送第一消息之前，所述方法还包括：所述目标节点接收所述同步源节点通过所述至少一个中间节点发送的第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间以及所述第三消息在所述每个中间节点处的等待时间信息；所述目标节点根据所述第三消息，通过所述至少一个中间节点向所述同步源节点发送所述第一消息；所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息中的时间信息、所述第三消息在所述目标节点处的接收时间以及所述第三消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
具体地，同步源节点可以记录该第三消息的发送时间，并将该第三消息的发送时间携带在该第三消息中发送。第一中间节点接收该第三消息，在该第三消息中添加该第三消息在第一中间节点处的等待时间信息，该第一中间节点发送该第三消息。目标节点接收该第三消息，记录该第三消息的接收时间。在目标节点接收到的第三消息中，会携带第三消息在同步源节点处的发送时间以及该第三消息在第一中间节点处的等待时间信息。
该目标节点在接收到该第三消息之后，发送目的地址为同步源节点的第一消息，记录该第一消息的发送时间。该第一消息经过第一中间节点，第一中间节点在该第一消息中添加该第一消息在该第一中间节点处的等待时间信息，然后再发送该第一消息。同步源节点接收该第一消息，记录该第一消息的接收时间，然后发送目的地址为目标节点的地址的第二消息。在同步源节点接收到的第一消息中，携带了第一中间节点添加的该第一消息在该 第一中间节点处的等待时间信息，因此，同步源节点会将该第一消息的接收时间以及该第一消息在该第一中间节点处的等待时间信息一起携带在上述第二消息中向目标节点发送。
该第二消息通过第一中间节点到达目标节点处，该目标节点可以根据之前记录的该第一消息的发送时间、该第三消息在同步源节点处的发送时间、该第三消息在该目标节点处的接收时间、该第三消息在第一中间节点处的等待时间信息，以及该第二消息中携带的该第一消息在同步源节点处的接收时间、该第一消息在中间节点处的等待时间信息，确定目标节点与同步源节点之间的时钟偏差。
可选地，上述第三消息可以为同步(Sync)通知，但本申请实施例对此不作限定。此外，该第三消息可以是同步源节点周期性发送的，也可以是由事件触发同步源节点发送该第三消息的，例如，该同步源节点接收到目标节点的同步请求之后发送该第三消息，本申请实施例对此也不作限定。
结合第一方面，在第一方面的某些实现方式中，所述确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据下列公式，确定所述目标节点与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000002
其中，T 6为所述第三消息在所述目标节点处的接收时间，T 5为所述第三消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述目标节点处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，
Figure PCTCN2018115015-appb-000003
为所述第三消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
结合第一方面，在第一方面的某些实现方式中，所述第三消息为所述同步源节点和所述至少一个中间节点采用广播或组播的方式发送的。
具体地，上述第三消息可以是同步源节点和第一中间节点采用广播或组播的方式发送的，能够进一步减小站点间的信令开销。
结合第一方面，在第一方面的某些实现方式中，在所述目标节点接收同步源节点通过至少一个中间节点发送的第二消息之前，所述方法还包括：所述目标节点通过所述至少一个中间节点向所述同步源节点发送同步请求消息，所述同步请求消息用于请求与所述同步源节点进行时钟同步；所述目标节点接收所述同步源节点通过所述至少一个中间节点发送的同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求。
具体地，在进行时钟同步之前，目标节点可以通过至少一个中间节点向同步源节点发送同步请求消息，请求与该同步源节点进行时钟同步。包括第一中间节点的至少一个中间节点直接对该同步请求消息进行转发。同步源节点接收该同步请求消息，在该同步源节点同意作为该目标节点的同步源的情况下，该同步源节点通过至少一个中间节点向目标节点发送同步应答消息。包括第一中间节点的至少一个中间节点直接对该同步应答消息进行转发。目标节点接收该同步应答消息，根据该同步应答消息，发送第一消息。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述目标节点发送第四消息，所述第四消息用于表示所述目标节点与所述同步源节点之间的跳数，所述跳数 用于其他目标节点确定是否与所述目标节点进行时钟同步。
应理解，所述可作为基准参考的同步源节点，可以是具有GPS同步能力的节点，也可以是通过IEEE 1588协议与传输网同步的节点等，本申请实施例对此不作限定。还应理解，上述目标节点发送第四消息，可以是通过组播或单播的方式发送，本申请实施例对此也不作限定。
具体地，网络中的所有节点都可以发送自身与可作为基准参考的同步源节点之间的跳数，用于其他需要进行时钟同步的节点(其他目标节点)，选择同步源。在一种可能的实现方式中，其他目标节点可以选择跳数最小的节点作为同步源，与该跳数最小的节点进行时钟同步。
第二方面，提供了另一种通信处理方法，包括：同步源节点接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；所述同步源节点根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息。
结合第二方面，在第二方面的某些实现方式中，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间。
结合第二方面，在第二方面的某些实现方式中，在所述同步源节点接收目标节点通过至少一个中间节点发送的第一消息之前，所述方法还包括：所述同步源节点通过所述至少一个中间节点向所述目标节点发送第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间。
结合第二方面，在第二方面的某些实现方式中，所述第三消息为所述同步源节点采用广播或组播的方式发送的。
结合第二方面，在第二方面的某些实现方式中，在所述同步源节点接收目标节点通过至少一个中间节点发送的第一消息之前，所述方法还包括：所述同步源节点接收所述目标节点通过所述至少一个中间节点发送的同步请求消息，所述同步请求消息用于请求与所述同步源节点进行时钟同步；所述同步源节点根据所述同步请求消息，通过所述至少一个中间节点向所述目标节点发送同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求。
第三方面，提供了另一种通信处理方法，包括：第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息，并发送所述第一消息；所述第一中间节点接收第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在至少一个中间节点中的每个中间节点处的等待时间信息，所述至少一个中间节点包括所述第一中间节点；所述第一中间节点发送所述第二消息。
结合第三方面，在第三方面的某些实现方式中，所述第一中间节点发送所述第二消息，包括：所述第一中间节点在所述第二消息中添加所述第二消息在所述第一中间节点处的等待时间信息，并发送所述第二消息。
结合第三方面，在第三方面的某些实现方式中，在所述第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息，并发送所述第一 消息之前，所述方法还包括：所述第一中间节点接收第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；所述第一中间节点在所述第三消息中添加所述第三消息在所述第一中间节点处的等待时间信息，并发送所述第三消息。
结合第三方面，在第三方面的某些实现方式中，所述第三消息为所述同步源节点和所述第一中间节点采用广播或组播的方式发送的。
结合第三方面，在第三方面的某些实现方式中，在所述第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息，并发送所述第一消息之前，所述方法还包括：所述第一中间节点接收同步请求消息，所述同步请求消息用于请求与所述同步源节点进行时钟同步；所述第一中间节点转发所述同步请求消息；所述第一中间节点接收同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求；所述第一中间节点转发所述同步应答消息。
结合第三方面，在第三方面的某些实现方式中，所述方法还包括：所述第一中间节点发送第五消息，所述第五消息用于表示所述第一中间节点与所述同步源节点之间的跳数，所述跳数用于其他目标节点确定是否与所述第一中间节点进行时钟同步。
结合第三方面，在第三方面的某些实现方式中，所述第一中间节点为终端设备或中继节点。
第四方面，提供了一种通信处理装置，用于执行第一方面或第一方面任意可能的实现方式中的方法。具体地，该终端设备包括用于执行上述第一方面或第一方面的任一种可能的实现方式中的方法的单元。
第五方面，提供了另一种通信处理装置，用于执行第二方面或第二方面任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第二方面或第二方面的任一种可能的实现方式中的方法的单元。
第六方面，提供了另一种通信处理装置，用于执行第二方面或第二方面任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第三方面或第三方面的任一种可能的实现方式中的方法的单元。
第七方面，提供了另一种通信处理装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第一方面或第一方面的任一种可能的实现方式中的方法。
第八方面，提供了另一种通信处理装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第二方面或第二方面的任一种可能的实现方式中的方法。
第九方面，提供了另一种通信处理装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第三方面或第三方面的任 一种可能的实现方式中的方法。
第十方面，提供了一种通信处理系统，该系统包括上述第三方面或第三方面的任一种可能实现方式中的装置、第四方面或第四方面中的任一种可能实现方式中的装置以及第五方面或第五方面中的任一种可能实现方式中的装置；或者
该系统包括上述第六方面或第六方面的任一种可能实现方式中的装置、第七方面或第七方面中的任一种可能实现方式中的装置以及第八方面或第八方面中的任一种可能实现方式中的装置。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被计算机运行时，使得所述计算机执行上述第一方面或第一方面任一种可能实现方式中的方法。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被计算机运行时，使得所述计算机执行上述第二方面或第二方面任一种可能实现方式中的方法。
第十三方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被计算机运行时，使得所述计算机执行上述第三方面或第三方面任一种可能实现方式中的方法。
第十四方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的指令。
第十五方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的指令。
第十六方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第三方面或第三方面的任意可能的实现方式中的方法的指令。
第十七方面，提供了一种芯片系统，包括：输入接口、输出接口、至少一个处理器、存储器，所述输入接口、输出接口、所述处理器以及所述存储器之间通过内部连接通路互相通信，所述处理器用于执行所述存储器中的代码，当所述代码被执行时，所述处理器用于执行上述第一方面或第一方面的任意可能的实现方式中的方法。
第十八方面，提供了一种芯片系统，包括：输入接口、输出接口、至少一个处理器、存储器，所述输入接口、输出接口、所述处理器以及所述存储器之间通过内部连接通路互相通信，所述处理器用于执行所述存储器中的代码，当所述代码被执行时，所述处理器用于执行上述第二方面或第二方面的任意可能的实现方式中的方法。
第十九方面，提供了一种芯片系统，包括：输入接口、输出接口、至少一个处理器、存储器，所述输入接口、输出接口、所述处理器以及所述存储器之间通过内部连接通路互相通信，所述处理器用于执行所述存储器中的代码，当所述代码被执行时，所述处理器用于执行上述第三方面或第三方面的任意可能的实现方式中的方法。
附图说明
图1示出了本申请实施例的通信系统的示意图。
图2示出了根据本申请实施例的通信处理方法的示意性流程图。
图3示出了根据本申请实施例的另一通信处理方法的示意性流程图。
图4示出了根据本申请实施例的另一通信处理方法的示意性流程图。
图5示出了根据本申请实施例的另一通信处理方法的示意性流程图。
图6示出了根据本申请实施例的另一通信处理方法的示意性流程图。
图7示出了根据本申请实施例的通信处理装置的示意性框图。
图8示出了根据本申请实施例的另一通信处理装置的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)通信系统、以及未来的5G通信系统等。
图1示出了本申请实施例应用的通信系统100。该通信系统100可以包括至少一个基站110、至少一个终端设备120以及至少一个中继节点130。该基站110可以是LTE系统中的演进型基站(evolutional node B，eNB或eNodeB)，或者是云无线接入网络(cloud radio access network，CRAN)中的无线控制器，或者未来5G网络中的基站(可统称为新一代无线接入网节点(NG-RAN node)，包括gNB、NG-eNB、中心单元(central unit，CU)和分布式单元(distributed unit，DU)分离形态的gNB等)，或者是处理通信数据的基带单元(base band unit，BBU)等，还可以是无线局域网(wireless local area network，WLAN)接入设备等非3GPP系统的无线接入网设备等。该终端设备120可以是移动的或固定的。该终端设备120可以指接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、用户驻地设备(customer premise equipment，CPE)、家庭网关(residential gateway，RG)、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
应理解，上述中继节点130可以是网络设备，也可以是终端设备，例如，客户终端设备(customer premise equipment，CPE)、住宅网关(residential gateway，RG)或者UE等，还可以是无线回传节点，本申请实施例对此不作限定。
无线回传节点用于为无线接入该无线回传节点的节点(例如，终端)提供无线回传服务。上述无线回传节点可以为5G网络中的无线回传节点，示例性的，5G网络中的无线回传节点可以称为接入回传一体化(integrated access and backhaul，IAB)节点，当然也可以有其他名称，本申请实施例对此不作具体限定。
在无线中继组网场景下，中继节点(relay node，RN)通过无线回传链路连接到宿主基站(donor gNodeB，DgNB)，DgNB可以通过有线回传链路连接到核心网；进一步的，在多跳无线中继组网场景下，部分中继节点将通过多跳无线链路连接到宿主基站，中继节点和宿主基站有一定的层级关系，每一个中继节点将为其提供回传服务的节点视为父节 点，例如，如图1所示，终端设备120和基站110之间存在至少一个中继节点130(从基站110至终端设备120依次称为RN 1、RN 2和RN 3)，RN 3所服务终端设备120的上行数据包，将经由RN 3传输至RN 2，再经由RN 2传输至RN 1，再由RN 1传输至基站110，最后由基站110发送至移动网关设备，下行数据包将由基站110从移动网关设备处接收后，依次通过RN 1、RN 2和RN 3发送至终端设备120。
应理解，若上述中继节点130为IAB节点，则上述宿主基站又可以称为IAB宿主(IAB donor)。IAB节点可以为终端提供无线接入服务，并通过无线回传链路连接到IAB donor传输用户的业务数据。IAB donor可以是一个完整的实体，也可以是CU和DU分离的形态，即由集中式单元(donor-CU)和分布式单元(donor-DU)组成，本申请实施例对此不作限定。
图1示例性地示出了一个基站、一个终端设备和三个中继节点，可选地，该通信系统100可以包括多个基站并且每个基站的覆盖范围内可以包括其它数量的终端设备以及其他数量的中继节点，本申请实施例对此不做限定。
可选地，该无线通信系统100还可以包括接入管理功能单元、会话管理功能单元、用户面功能单元等其他网元或网络实体，本申请实施例不限于此。
针对上述场景下的时钟同步，宿主基站可以配置有全球定位系统(global positioning system，GPS)设备，通过接收GPS信号与网络同步，因此，可以将基站作为同步源节点，使中继节点通过空口同步方式与该同步源节点进行时钟同步。
在本文中，将选定作为时钟同步参考的节点(例如，具有GPS同步能力的节点，即能够通过接收GPS信号进行网络同步的节点)称为同步源节点，将需要与同步源节点进行时钟同步的节点称为目标节点，将目标节点和同步源节点之间存在的辅助进行同步信息传输的节点称为中间节点。但应理解，在本申请实施例中，目标节点和中间节点可以是上述中继节点，也可以是上述终端设备，本申请实施例对此不作限定。同步源节点可以是上述中继节点，也可以是上述基站，本申请实施例对此也不作限定。
在具体实现中，目标节点和同步源节点之间可能存在一个中间节点，也可能存在多个中间节点，为便于描述，下面以目标节点和同步源节点之间的节点为第一中间节点为例进行说明。
图2示出了本申请实施例的通信处理方法200的示意性流程图。该方法200可以应用于图1所示的通信系统100，但本申请实施例不限于此。
S210，目标节点通过第一中间节点向同步源节点发送第一消息，所述目标节点记录所述第一消息的发送时间；
S220，所述第一中间节点接收所述第一消息，在所述第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息；
S230，所述第一中间节点向所述同步源节点发送所述第一消息；
S240，所述同步源节点接收目标节点通过所述第一中间节点发送的所述第一消息，通过所述第一中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在所述第一中间节点处的等待时间信息；
S250，所述第一中间节点接收第二消息，并向所述目标节点发送所述第二消息；
S260，所述目标节点接收所述同步源节点通过所述第一中间节点发送的所述第二消 息，并根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
具体地，目标节点可以发送目的地址为同步源节点的地址的第一消息，记录该第一消息的发送时间。该第一消息经过第一中间节点，第一中间节点在该第一消息中添加该第一消息在该第一中间节点处的等待时间信息，然后再发送该第一消息。同步源节点接收该第一消息，记录该第一消息的接收时间，然后发送目的地址为目标节点的地址的第二消息。在同步源节点接收到的第一消息中，携带了第一中间节点添加的该第一消息在该第一中间节点处的等待时间信息，因此，同步源节点会将该第一消息的接收时间以及该第一消息在该第一中间节点处的等待时间信息一起携带在上述第二消息中。该第二消息通过第一中间节点到达目标节点处，该目标节点可以根据之前记录的该第一消息在目标节点的发送时间、该第一消息在同步源节点的接收时间、该第一消息在中间节点处的等待时间信息，确定目标节点与同步源节点之间的时钟偏差。该目标节点可以进一步根据所得的时钟偏差，对该目标节点的时钟进行调整，使得该目标节点与该同步源节点保持时钟同步。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
应理解，上述等待时间信息可以包括该第一中间节点接收该第一消息的时间和该第一中间节点发送该第一消息的时间，也可以包括该第一中间节点发送该第一消息的时间与该第一中间节点接收到该第一消息的时间之差，本申请实施例对此不作限定。
还应理解，上述第一消息的源地址为目标节点的地址，目的地址为同步源节点的地址，第二消息的源地址为同步源节点的地址，目的地址为目标节点的地址，第一中间节点可以根据路由协议对接收到的消息进行转发。在具体实现中，目标节点和同步源节点可以在发送的消息中显示携带上述源地址和目的地址的相应字段，也可以通过隐式的方式(例如，信道、承载或特殊的消息类型等)来指示所发送的消息的源地址和目的地址，本申请实施例对此不作限定。
在本文中，由于中间节点对消息的处理过程仅仅是添加了等待时间信息，消息的其他内容并未发生变化，为便于描述，第一中间节点接收的第一消息经过该第一中间节点添加等待时间信息之后，仍然将其称为第一消息，对于后面的第二消息和第三消息类似，不再赘述。
可选地，上述第一消息可以为延时(Delay)请求，第二消息可以为Delay应答，但本申请实施例对此不作限定。
在一种具体的实现方式中，上述节点(例如，目标节点、中间节点、同步源节点)确定消息的发送时间，可以根据该节点发送的物理层帧(frame)或子帧(subframe)的起始时间或结束时间来表示该消息的发送时间；同理，上述节点确定消息的接收时间，可以根据该节点接收的物理层帧(frame)或子帧(subframe)的起始时间或结束时间来表示该消息的接收时间。
在一种可能的实现方式中，目标节点可以向同步源节点发送了多个第一消息，该第一中间节点可以选择其中一个第一消息添加等待时间信息，并将所选择的第一消息告知该目 标节点，以便该目标节点后续可以根据该第一中间节点所选择的第一消息的发送时间，以及接收到的第二消息中的时间信息，计算该目标节点与同步源节点之间的时钟偏差。
作为一个可选的实施例，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间和所述第二消息在所述每个中间节点处的等待时间信息；
在所述第一中间节点发送所述第二消息之前，所述方法还包括：
所述第一中间节点在所述第二消息中添加所述第二消息在所述第一中间节点处的等待时间信息；
所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息在所述目标节点处的接收时间以及所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
具体地，同步源节点可以记录该第二消息的发送时间，并将该第二消息的发送时间携带在该第二消息中发送。第一中间节点接收同步源节点发送的第二消息，该第二消息携带上述第一消息的发送时间、该第一消息的接收时间、该第一消息在中间节点处的等待时间信息以及该第二消息的发送时间。该第一中间节点可以在该第二消息中添加该第二消息在该第一中间节点处的等待时间信息，并发送该第二消息。目标节点接收第二消息，记录该第二消息的接收时间。在目标节点接收到的第二消息中，会携带该第一消息的接收时间、该第一消息在中间节点处的等待时间信息、该第二消息的发送时间以及该第二消息在该第一中间节点处的等待时间信息。因此，该目标节点可以根据该第一消息的发送时间、该第一消息的接收时间、该第一消息在中间节点处的等待时间信息、该第二消息的发送时间、该第二消息在该第一中间节点处的等待时间信息以及该第二消息的接收时间，确定该目标节点与该同步源节点之间的时钟偏差。
作为一个可选的实施例，所述确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据下列公式，确定所述目标节点与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000004
其中，T 4为所述第二消息在所述目标节点处的接收时间，T 3为所述第二消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述目标节点处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，T j (wd)为所述第二消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
具体地，wd表示waiting downlink，wu表示waiting uplink，在本申请实施例中，将目标节点向同步源节点发送消息称为上行传输(uplink)，将同步源节点向目标节点发送消息称为下行传输(downlink)。
在下列公式中：
Figure PCTCN2018115015-appb-000005
Figure PCTCN2018115015-appb-000006
其中，T为目标节点相对于同步源节点的时钟偏差，T i (p)为第一消息或第二消息在第i跳链路的传输时延，i＝1,...,N+1。T i (p)与节点间第i跳链路的距离和电磁波的传输速率相关，故在本申请实施例中，可以认为从目标节点到同步源节点的第一消息在各跳链路上的传输时延之和，与从同步源节点到目标节点的第二消息在各跳链路上的传输时延之和是相同的。
因此，为了计算T，可以将(2)式减去(1)式，再经过简单变换，即可得到下列公式：
Figure PCTCN2018115015-appb-000007
应理解，上述至少一个中间节点包括第一中间节点。
作为一个可选的实施例，在所述同步源节点接收目标节点通过至少一个中间节点发送的第一消息之前，所述方法还包括：
所述同步源节点通过所述至少一个中间节点向所述目标节点发送第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；
在所述第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息之前，所述方法还包括：
所述第一中间节点接收第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；
所述第一中间节点在所述第三消息中添加所述第三消息在所述第一中间节点处的等待时间信息；
所述第一中间节点发送所述第三消息；
在所述目标节点通过至少一个中间节点向同步源节点发送第一消息之前，所述方法还包括：
所述目标节点接收所述同步源节点通过所述至少一个中间节点发送的第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间以及所述第三消息在所述每个中间节点处的等待时间信息；
所述目标节点根据所述第三消息，通过所述至少一个中间节点向所述同步源节点发送所述第一消息；
所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息中的时间信息、所述第三消息在所述目标节点处的接收时间以及所述第三消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
具体地，同步源节点可以记录第三消息的发送时间，并将该第三消息的发送时间携带在该第三消息中发送。第一中间节点接收该第三消息，在该第三消息中添加该第三消息在第一中间节点处的等待时间信息，该第一中间节点发送该第三消息。目标节点接收该第三消息，记录该第三消息的接收时间。在目标节点接收到的第三消息中，会携带第三消息在 同步源节点处的发送时间以及该第三消息在第一中间节点处的等待时间信息。
该目标节点在接收到该第三消息之后，发送目的地址为同步源节点的第一消息，记录该第一消息的发送时间。该第一消息经过第一中间节点，第一中间节点在该第一消息中添加该第一消息在该第一中间节点处的等待时间信息，然后再发送该第一消息。同步源节点接收该第一消息，记录该第一消息的接收时间，然后发送目的地址为目标节点的地址的第二消息。在同步源节点接收到的第一消息中，携带了第一中间节点添加的该第一消息在该第一中间节点处的等待时间信息，因此，同步源节点会将该第一消息的接收时间以及该第一消息在该第一中间节点处的等待时间信息一起携带在上述第二消息中向目标节点发送。
该第二消息通过第一中间节点到达目标节点处，该目标节点可以根据之前记录的该第一消息的发送时间、该第三消息在同步源节点处的发送时间、该第三消息在该目标节点处的接收时间、该第三消息在第一中间节点处的等待时间信息，以及该第二消息中携带的该第一消息在同步源节点处的接收时间、该第一消息在中间节点处的等待时间信息，确定目标节点与同步源节点之间的时钟偏差。
可选地，上述第三消息可以为同步(Sync)通知，但本申请实施例对此不作限定。此外，该第三消息可以是同步源节点周期性发送的，也可以是由事件触发同步源节点发送该第三消息的，例如，该同步源节点接收到目标节点的同步请求之后发送该第三消息，本申请实施例对此也不作限定。
作为一个可选的实施例，所述确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
所述目标节点根据下列公式，确定所述目标节点与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000008
其中，T 6为所述第三消息在所述目标节点处的接收时间，T 5为所述第三消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述目标节点处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，
Figure PCTCN2018115015-appb-000009
为所述第三消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
具体地，由于存在下列公式：
Figure PCTCN2018115015-appb-000010
Figure PCTCN2018115015-appb-000011
其中，T为目标节点相对于同步源节点的时钟偏差，
Figure PCTCN2018115015-appb-000012
为第一消息或第三消息在第i跳链路的传输时延，i＝1,...,N+1。
Figure PCTCN2018115015-appb-000013
与节点间第i跳链路的距离和电磁波的传输速率相关，故在本申请实施例中，可以认为从目标节点到同步源节点的第一消息在各跳链路上的传输时延之和，与从同步源节点到目标节点的第三消息在各跳链路上的传输时延之和是相同的。
因此，为了计算T，可以将(4)式减去(3)式，再经过简单变换，即可得到下列公式：
Figure PCTCN2018115015-appb-000014
作为一个可选的实施例，所述第三消息为所述同步源节点和所述至少一个中间节点采用广播或组播的方式发送的。
具体地，上述第三消息可以是同步源节点和第一中间节点采用广播或组播的方式发送的，能够进一步减小站点间的信令开销。
作为一个可选的实施例，所述方法还包括：
所述目标节点发送第四消息，所述第四消息用于表示所述目标节点与可作为基准参考的同步源节点之间的跳数，所述跳数用于其他节点确定是否选择所述目标节点作为时钟同步参考的节点与之进行时钟同步。
所述第一中间节点发送第五消息，所述第五消息用于表示所述第一中间节点与所述可作为基准参考的同步源节点之间的跳数，所述跳数用于其他目标节点确定是否选择所述第一中间节点作为时钟同步参考的节点与之进行时钟同步。
应理解，所述可作为基准参考的同步源节点，可以是具有GPS同步能力的节点，也可以是通过IEEE 1588协议与传输网同步的节点等，本申请实施例对此不作限定。还应理解，上述目标节点发送第四消息，可以是通过广播或组播或单播的方式发送，本申请实施例对此也不作限定。同理，上述第一中间节点发送第五消息，可以是通过广播或组播或单播的方式发送，本申请实施例对此也不作限定。
具体地，网络中的所有节点都可以发送自身与可作为基准参考的同步源节点之间的跳数，用于其他需要进行时钟同步的节点(其他目标节点)，选择同步源。在一种可能的实现方式中，其他目标节点可以选择跳数最小的节点作为同步源，与该跳数最小的节点进行时钟同步。
作为一个可选的实施例，在所述目标节点接收同步源节点通过至少一个中间节点发送的第二消息之前，所述方法还包括：
所述目标节点通过所述至少一个中间节点向所述同步源节点发送同步请求消息，所述同步请求消息用于所述目标节点请求与所述同步源节点进行时钟同步；
所述目标节点接收所述同步源节点通过所述至少一个中间节点发送的同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求。
在所述同步源节点接收目标节点通过至少一个中间节点发送的第一消息之前，所述方法还包括：
所述同步源节点接收所述目标节点通过所述至少一个中间节点发送的同步请求消息，所述同步请求消息用于所述目标节点请求与所述同步源节点进行时钟同步；
所述同步源节点根据所述同步请求消息，通过所述至少一个中间节点向所述目标节点发送同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求。
在所述第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息，并发送所述第一消息之前，所述方法还包括：
所述第一中间节点接收同步请求消息，所述同步请求消息用于所述目标节点请求与所述同步源节点进行时钟同步；
所述第一中间节点转发所述同步请求消息；
所述第一中间节点接收同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求；
所述第一中间节点转发所述同步应答消息。
具体地，在进行时钟同步之前，目标节点可以通过至少一个中间节点向同步源节点发送同步请求消息，请求与该同步源节点进行时钟同步。包括第一中间节点的至少一个中间节点对该同步请求消息进行转发。同步源节点接收该同步请求消息，该同步源节点确定是否同意作为该目标节点的同步源，该同步源节点通过至少一个中间节点向目标节点发送同步应答消息。包括第一中间节点的至少一个中间节点对该同步应答消息进行转发。目标节点接收该同步应答消息，若该同步应答消息表明所述同步源节点接受所述目标节点的同步请求，所述目标节点向所述同步源节点发送第一消息，或者，所述同步源节点向所述目标节点发送第三消息。
作为一个可选的实施例，所述第一中间节点为终端设备或中继节点。
图3示出了本申请实施例的另一通信处理方法300的示意性流程图。该方法300可以应用于图1所示的通信系统100，但本申请实施例不限于此。在方法300中，第三中继节点为目标节点，第二中继节点和第一中继节点为中间节点，基站为同步源节点。
在S301中，第三中继节点通过第二中继节点和第一中继节点向基站发送同步请求消息，该同步请求消息用于请求与该基站进行时钟同步。
在S302中，基站接收第三中继节点发送的同步请求消息，并通过第一中继节点和第二中继节点向第三中继节点发送同步应答消息，该同步应答消息用于表示基站接收第三中继节点的同步请求，即基站同意作为该第三中继节点的同步源。
在S303中，基站通过第一中继节点和第二中继节点向第三中继节点发送第三消息，该第三消息可以包括该第三消息的发送时间T 5。
可选的，该第三消息还可以包括第三中继节点的标识信息和基站的标识信息中的至少一种。该第三消息可以为Sync通知消息。该第三消息可以是基站周期性发送的，也可以是事件触发发送的，例如，基站可以根据第三中继节点的同步请求消息发送该第三消息，本申请实施例对此不作限定。
在S304中，第一中继节点接收该第三消息，在该第三消息中添加该第三消息在该第一中继节点处的等待时间信息。
具体地，该第一中继节点接收到该第三消息的时间为
Figure PCTCN2018115015-appb-000015
发送该第三消息的时间为
Figure PCTCN2018115015-appb-000016
该第三消息在该第一中继节点处的等待时间段为
Figure PCTCN2018115015-appb-000017
应理解，第一中继节点添加该第三消息在该第一中继节点处的等待时间信息，可以添加
Figure PCTCN2018115015-appb-000018
和
Figure PCTCN2018115015-appb-000019
也可以添加
Figure PCTCN2018115015-appb-000020
本申请实施例对此不作限定。
在S305中，第一中继节点向第二中继节点发送该第三消息。
在S306中，第二中继节点接收第一中继节发送的该第三消息，在该第三消息中添加该第三消息在该第二中继节点处的等待时间信息。
具体地，该第二中继节点接收到该第三消息的时间为
Figure PCTCN2018115015-appb-000021
发送该第三消息的时间为
Figure PCTCN2018115015-appb-000022
该第三消息在该第一中继节点处的等待时间段为
Figure PCTCN2018115015-appb-000023
应理解，第二中继节点添加该第三消息在该第二中继节点处的等待时间信息，可以添加
Figure PCTCN2018115015-appb-000024
和
Figure PCTCN2018115015-appb-000025
也可以添加
Figure PCTCN2018115015-appb-000026
本申请实施例对此不作限定。
在S307中，第二中继节点向第三中继节点发送该第三消息。
在S308中，第三中继节点接收第二中继节点发送的该第三消息，记录该第三消息的接收时间T 6，并通过第二中继节点和第一中继节点向基站发送第一消息，记录该第一消息的发送时间T 1。该第一消息可以为Delay请求消息。
具体地，第三中继节点发送的第一消息中可以包括以下信息中的至少一项：第一消息在第三中继节点处的发送时间T 1、第三中继节点的标识信息以及基站的标识信息。
在S309中，第二中继节点接收该第三中继节点发送的该第一消息，在该第一消息中添加该第一消息在该第二中继节点处的等待时间信息。
具体地，该第二中继节点接收到该第一消息的时间为T 2 (ru)，送该第一消息的时间为T 2 (tu)，该第一消息在该第二中继节点处的等待时间段为
T 2 (wu)＝T 2 (tu)-T 2 (ru)
应理解，第二中继节点添加该第一消息在该第二中继节点处的等待时间信息，可以添加T 2 (ru)和T 2 (tu)，也可以添加T 2 (wu)，本申请实施例对此不作限定。
在S310中，第二中继节点向第一中继节点发送该第一消息。
在S311中，第一中继节点接收该第二中继节点发送的该第一消息，在该第一消息中添加该第一消息在该第一中继节点处的等待时间信息。
具体地，该第一中继节点接收到该第一消息的时间为T 1 (ru)，发送该第一消息的时间为T 1 (tu)，该第一消息在该第一中继节点处的等待时间段为
T 1 (wu)＝T 1 (tu)-T 1 (ru)
应理解，第一中继节点添加该第一消息在该第一中继节点处的等待时间信息，可以添加T 1 (ru)和T 1 (tu)，也可以添加T 1 (wu)，本申请实施例对此不作限定。
在S312中，第一中继节点向基站发送该第一消息。
在S313中，基站接收第一中继节点发送的该第一消息，记录该第一消息的接收时间T 2，并通过第一中继节点和第二中继节点向第三中继节点发送第二消息。该第二消息可以是Delay响应消息。
具体地，该第二消息中携带第一消息在基站处的接收时间T 2以及该第一消息在中间节点处的等待时间信息，即该第一消息在中间节点处的等待时间段T j (wu)(包括上述T 1 (wu)和T 2 (wu))或者中间节点添加的{T j (ru)，T j (tu)}，j为中间节点的标号，为大于或等于1的整数。在本申请实施例中，中间节点的个数N＝2，j＝1,2。可选的，该第二消息中还可携带基站的标识信息和第三中继节点的标识信息中的至少一种，本申请实施例对此不作限定。
在S314中，第一中继节点接收该第二消息，向第二中继节点发送该第二消息。
在S315中，第二中继节点接收该第二消息，向第三中继节点发送该第二消息。
在S316中，第三中继节点接收该第二消息，确定时钟偏差。
具体地，该第三中继节点可以根据下述公式计算该第三中继节点与基站之间的时钟偏差：
Figure PCTCN2018115015-appb-000027
在一种可能的方式中，该第三中继节点在当前的时钟数值中减去T，从而实现该第三中继节点和基站之间的时钟同步。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
图4示出了本申请实施例的另一通信处理方法400的示意性流程图。该方法400可以应用于图1所示的通信系统100，但本申请实施例不限于此。在方法400中，第三中继节点为目标节点，第二中继节点和第一中继节点为中间节点，基站为同步源节点。
在S401中，第三中继节点通过第二中继节点和第一中继节点向基站发送同步请求消息，该同步请求消息用于请求与该基站的时钟进行同步。
在S402中，基站接收第三中继节点发送的同步请求消息，并通过第一中继节点和第二中继节点向第三中继节点发送同步应答消息，该同步应答消息用于表示基站接受第三中继节点的同步请求，即基站同意作为该第三中继节点的同步源。
在S403中，第三中继节点通过第二中继节点和第一中继节点向基站发送第一消息，该第一消息中可以携带该第一消息的发送时间T 1，可选的，该第一消息中还可以携带第三中继节点的标识信息和基站的标识信息中的至少一种。具体地，该第一消息可以为Delay请求消息。
在S404中，第二中继节点接收该第一消息，在该第一消息中添加该第一消息在该第二中继节点处的等待时间信息。
具体地，该第二中继节点接收到该第一消息的时间为T 2 (ru)，发送该第一消息的时间为T 2 (tu)，该第一消息在该第二中继节点处的等待时间段为
T 2 (wu)＝T 2 (tu)-T 2 (ru)
应理解，第二中继节点添加该第一消息在该第二中继节点处的等待时间信息，可以添加T 2 (ru)和T 2 (tu)，也可以添加T 2 (wu)，本申请实施例对此不作限定。
在S405中，第二中继节点向第一中继节点发送该第一消息。
在S406中，第一中继节点接收该第二中继节点发送的该第一消息，在该第一消息中添加该第一消息在该第一中继节点处的等待时间信息。
具体地，该第一中继节点接收到该第一消息的时间为T 1 (ru)，发送该第一消息的时间为T 1 (tu)，该第一消息在该第一中继节点处的等待时间段为
T 1 (wu)＝T 1 (tu)-T 1 (ru)
应理解，第一中继节点添加该第一消息在该第一中继节点处的等待时间信息，可以添加T 1 (ru)和T 1 (tu)，也可以添加T 1 (wu)，本申请实施例对此不作限定。
在S407中，第一中继节点向基站发送该第一消息。
在S408中，基站接收第一中继节点发送的该第一消息，记录该第一消息的接收时间T 2，并通过第一中继节点和第二中继节点向第三中继节点发送第二消息，基站记录该第二消息的发送时间T 3，该第二消息可以是Delay响应消息。
具体地，该第二消息中携带该第二消息在基站处的发送时间T 3、第一消息在基站处的接收时间T 2以及该第一消息在中间节点处的等待时间信息，即该第一消息在中间节点处的等待时间段T j (wu)(包括上述T 1 (wu)和T 2 (wu))或者中间节点添加的{T j (ru)，T j (tu)}，j为中间节点的标号，为大于或等于1的整数。在本申请实施例中，中间节点的个数N＝2，j＝1,2。可选的，该第二消息中还可以携带第三中继节点的标识信息、基站的标识信息中的至少一种，本申请实施例对此不作限定。
在S409中，第一中继节点接收该第二消息，在该第二消息中添加该第二消息在该第一中继节点处的等待时间信息。
具体地，该第一中继节点接收到该第二消息的时间为T 1 (rd)，发送该第二消息的时间为T 1 (td)，该第二消息在该第一中继节点处的等待时间段为
T 1 (wd)＝T 1 (td)-T 1 (rd)
应理解，第一中继节点添加该第二消息在该第一中继节点处的等待时间信息，可以添加T 1 (rd)和T 1 (td)，也可以添加T 1 (wd)，本申请实施例对此不作限定。
在S410中，第一中继节点向第二中继节点发送该第二消息。
在S411中，第二中继节点接收第一中继节发送的该第二消息，在该第二消息中添加该第二消息在该第二中继节点处的等待时间信息。
具体地，该第二中继节点接收到该第二消息的时间为T 2 (rd)，发送该第二消息的时间为T 2 (td)，该第二消息在该第一中继节点处的等待时间段为
T 2 (wd)＝T 2 (td)-T 2 (rd)
应理解，第二中继节点添加该第二消息在该第二中继节点处的等待时间信息，可以添加T 2 (rd)和T 2 (td)，也可以添加T 2 (wd)，本申请实施例对此不作限定。
在S412中，第二中继节点向第三中继节点发送该第二消息。
在S413中，第三中继节点接收该第二消息，记录该第二消息的接收时间T 4，确定时钟偏差。
具体地，该第三中继节点可以根据下述公式计算该第三中继节点与基站之间的时钟偏差：
Figure PCTCN2018115015-appb-000028
在一种可能的方式中，该第三中继节点在其当前的时钟数值中减去T，从而实现该第三中继节点和基站之间的时钟同步。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。此外，本申请实施例通过两个消息的传递即可实现时钟同步，减少了目标节点和同步源节点之间的信令交互。
图5示出了本申请实施例的另一通信处理方法500的示意性流程图。该方法500可以应用于图1所示的通信系统100，但本申请实施例不限于此。在方法500中，中继节点为目标节点，终端设备为中间节点，基站为同步源节点。
在S501中，中继节点通过终端设备向基站发送同步请求消息，该同步请求消息用于 中继节点请求与该基站的时钟进行同步。
在S502中，基站接收中继节点通过终端设备发送的同步请求消息，并通过终端设备向中继节点发送同步应答消息，该同步应答消息用于表示基站接收中继节点的同步请求，即基站同意作为该中继节点的同步源。
在S503中，基站通过终端设备向中继节点发送第三消息，该第三消息可以包括该第三消息的发送时间T 5。
可选的，该第三消息还可以包括中继节点的标识信息和基站的标识信息中的至少一种。具体地，该第三消息为Sync通知消息。该第三消息可以是基站周期性发送的，也可以是事件触发发送的，例如，基站可以根据接收到的中继节点的同步请求消息发送该第三消息，本申请实施例对此不作限定。
在S504中，终端设备接收该第三消息，在该第三消息中添加该第三消息在该终端设备处的等待时间信息。
具体地，该终端设备接收到该第三消息的时间为T 1 (rd)，发送该第三消息的时间为
Figure PCTCN2018115015-appb-000029
该第三消息在该终端设备处的等待时间段为
Figure PCTCN2018115015-appb-000030
应理解，终端设备添加该第三消息在该第一中继节点处的等待时间信息，可以添加T 1 (rd)和T 1 (td)，也可以添加T 1 (wd)，本申请实施例对此不作限定。
在S505中，终端设备向中继节点发送该第三消息。
在S506中，中继节点接收终端设备发送的该第三消息，记录该第三消息的接收时间T 6，并通过终端设备向基站发送第一消息，中继节点记录其发送第一消息的时间T 1。该第一消息可以为Delay请求消息。
具体地，中继节点发送的第一消息中可以包括以下信息中的至少一项：第一消息在中继节点处的发送时间T 1、中继节点的标识信息以及基站的标识信息。
在S507中，终端设备接收该第一消息，并在该第一消息中添加该第一消息在该终端设备处的等待时间信息。
具体地，该终端设备接收到该第一消息的时间为T 1 (ru)，发送该第一消息的时间为T 1 (tu)，该第一消息在该终端设备处的等待时间段为
T 1 (wu)＝T 1 (tu)-T 1 (ru)
应理解，终端设备添加该第一消息在该终端设备处的等待时间信息，可以添加T 1 (ru)和T 1 (tu)，也可以添加T 1 (wu)，本申请实施例对此不作限定。
在S508中，终端设备向基站发送该第一消息。
在S509中，基站接收终端设备发送的该第一消息，记录该第一消息的接收时间T 2，并通过终端设备向中继节点发送第二消息，该第二消息可以是Delay响应消息。
具体地，该第二消息中携带第一消息在基站处的接收时间T 2以及该第一消息在中间节点处的等待时间信息，即该第一消息在中间节点处的等待时间段T j (wu)(包括上述T 1 (wu))或者中间节点添加的{T j (ru)，T j (tu)}，j为中间节点的标号，为大于或等于1的整数。在本申请实施例中，中间节点的个数N＝1，j＝1。可选的，该第二消息中还可携带基站的标识信息和第三中继节点的标识信息中的至少一种，本申请实施例对此不作限定。
在S510中，终端设备接收该第二消息，向中继节点发送该第二消息。
在S511中，中继节点接收该第二消息，确定时钟偏差。
具体地，该中继节点可以根据下述公式计算该中继节点与基站之间的时钟偏差：
Figure PCTCN2018115015-appb-000031
在一种可能的方式中，该中继节点在当前的时钟数值中减去T，从而实现该中继节点和基站之间的时钟同步。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。此外，本申请实施例对能够同时收到同步源节点和目标节点发送的数据的终端设备而言，站点间的同步有利于减小干扰。
图6示出了本申请实施例的另一通信处理方法600的示意性流程图。该方法600可以应用于图1所示的通信系统100，但本申请实施例不限于此。在方法600中，中继节点为目标节点，终端设备为中间节点，基站为同步源节点。
在S601中，中继节点通过终端设备向基站发送同步请求消息，该同步请求消息用于中继节点请求与该基站的时钟进行同步。
在S602中，基站接收中继节点通过终端设备发送的同步请求消息，并通过该终端设备向中继节点发送同步应答消息，该同步应答消息用于表示基站接受中继节点的同步请求，即基站同意作为该中继节点的同步源。
在S603中，中继节点通过终端设备向基站发送第一消息，中继节点记录该第一消息的发送时间T 1。可选的，该第一消息中可以携带以下信息中的至少一项：中继节点发送该第一消息的时间T 1、中继节点的标识信息及基站的标识信息。具体地，该第一消息可以为Delay请求消息。
在S604中，终端设备接收该第一消息，在该第一消息中添加该第一消息在该终端设备处的等待时间信息。
具体地，该终端设备接收到该第一消息的时间为T 1 (ru)，发送该第一消息的时间为T 1 (tu)，该第一消息在该终端设备处的等待时间段为
T 1 (wu)＝T 1 (tu)-T 1 (ru)
应理解，终端设备添加该第一消息在该终端设备处的等待时间信息，可以添加T 1 (ru)和T 1 (tu)，也可以添加T 1 (wu)，本申请实施例对此不作限定。
在S605中，终端设备向基站发送该第一消息。
在S606中，基站接收该第一消息，记录该第一消息的接收时间T 2，并通过终端设备向中继节点发送第二消息，基站记录其发送该第二消息的发送时间T 3，该第二消息可以是Delay响应消息。
具体地，该第二消息中携带该第二消息在基站处的发送时间T 3、第一消息在基站处的接收时间T 2以及该第一消息在终端设备处的等待时间信息，即该第一消息在终端设备处的等待时间段T j (wu)(包括上述T 1 (wu))或者终端设备添加的{T j (ru)，T j (tu)}，j为中间节点的标号，为大于或等于1的整数。在本申请实施例中，中间节点的个数N＝1，j＝1。可选的， 该第二消息中还可以携带中继节点的标识信息和基站的标识信息中的至少一种，本申请实施例对此不作限定。
在S607中，终端设备接收该第二消息，在该第二消息中添加该第二消息在该终端设备处的等待时间信息。
具体地，该终端设备接收到该第二消息的时间为T 1 (rd)，发送该第二消息的时间为T 1 (td)，该第二消息在该终端设备处的等待时间段为
T 1 (wd)＝T 1 (td)-T 1 (rd)
应理解，终端设备添加该第二消息在该终端设备处的等待时间信息，可以添加T 1 (rd)和T 1 (td)，也可以添加T 1 (wd)，本申请实施例对此不作限定。
在S608中，终端设备向中继节点发送该第二消息。
在S609中，中继节点接收该第二消息，记录该第二消息的接收时间T 4，确定时钟偏差。
具体地，该中继节点可以根据下述公式计算该中继节点与基站之间的时钟偏差：
Figure PCTCN2018115015-appb-000032
在一种可能的方式中，该第三中继节点在其当前的时钟数值中减去T，从而实现该中继节点和基站之间的时钟同步。
本申请实施例的通信处理方法，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。此外，本申请实施例通过两个消息的传递即可实现时钟同步，减少了目标节点和同步源节点之间的信令交互。且本申请实施例对能够同时收到同步源节点和目标节点发送的数据的终端设备而言，站点间的同步有利于减小干扰。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中结合图1至图6，详细描述了根据本申请实施例的通信处理方法，下面将结合图7至图8，详细描述根据本申请实施例的通信处理装置。
图7示出了本申请实施例提供的通信处理装置700，该装置700包括：收发单元710和处理单元720。
在一种可能的实现方式中，装置700可以具体为上述实施例中的目标节点，装置700可以用于执行上述方法实施例中与目标节点对应的各个流程和/或步骤。
具体地，收发单元710，用于接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述装置的第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
处理单元720，用于根据所述第一消息在所述装置处的发送时间和所述第二消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
本申请实施例的通信处理装置，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节 点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
可选地，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间和所述第二消息在所述每个中间节点处的等待时间信息；所述处理单元720具体用于：根据所述第一消息在所述装置处的发送时间、所述第二消息在所述装置处的接收时间以及所述第二消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
可选地，所述处理单元720具体用于：根据下列公式，确定所述装置与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000033
其中，T 4为所述第二消息在所述装置处的接收时间，T 3为所述第二消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述装置处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，T j (wd)为所述第二消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
可选地，所述收发单元710还用于：在通过至少一个中间节点向同步源节点发送第一消息之前，接收所述同步源节点通过所述至少一个中间节点发送的第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间以及所述第三消息在所述每个中间节点处的等待时间信息；所述收发单元710还用于：根据所述第三消息，通过所述至少一个中间节点向所述同步源节点发送所述第一消息；所述处理单元720具体用于：根据所述第一消息在所述装置处的发送时间、所述第二消息中的时间信息、所述第三消息在所述装置处的接收时间以及所述第三消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
可选地，所述处理单元720具体用于：根据下列公式，确定所述装置与所述同步源节点之间的时钟偏差：
Figure PCTCN2018115015-appb-000034
其中，T 6为所述第三消息在所述装置处的接收时间，T 5为所述第三消息在所述同步源节点处的发送时间，T 2为所述第一消息在所述同步源节点处的接收时间，T 1为所述第一消息在所述装置处的发送时间，所述至少一个中间节点的个数为N，N为大于或等于1的整数，j用于表示所述至少一个中间节点的标号，j＝1,...,N，
Figure PCTCN2018115015-appb-000035
为所述第三消息在中间节点j处的等待时间，T j (wu)为所述第一消息在所述中间节点j处的等待时间。
可选地，所述收发单元710还用于：在接收同步源节点通过至少一个中间节点发送的第二消息之前，通过所述至少一个中间节点向所述同步源节点发送同步请求消息，所述同步请求消息用于请求与所述同步源节点进行时钟同步；所述收发单元710还用于：接收所述同步源节点通过所述至少一个中间节点发送的同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述装置的同步请求。
可选地，所述第三消息为所述同步源节点和所述至少一个中间节点采用广播或组播的 方式发送的。
可选地，所述收发单元710还用于：发送第四消息，所述第四消息用于表示所述装置与所述同步源节点之间的跳数，所述跳数用于其他装置确定是否与所述装置进行时钟同步。
在另一种可能的实现方式中，装置700可以具体为上述实施例中的同步源节点，装置700可以用于执行上述方法实施例中与同步源节点对应的各个流程和/或步骤。
具体地，收发单元710，用于接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述装置处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息。
本申请实施例的通信处理装置，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
可选地，所述第二消息中还携带所述第二消息在所述装置处的发送时间。
可选地，所述收发单元710还用于：在接收目标节点通过至少一个中间节点发送的第一消息之前，通过所述至少一个中间节点向所述目标节点发送第三消息，所述第三消息中携带所述第三消息在所述装置处的发送时间。
可选地，所述收发单元710还用于：在接收目标节点通过至少一个中间节点发送的第一消息之前，接收所述目标节点发送的同步请求消息，所述同步请求消息用于请求与所述装置进行时钟同步；根据所述同步请求消息，通过所述至少一个中间节点向所述目标节点发送同步应答消息，所述同步应答消息用于表示所述装置接受或拒绝所述目标节点的同步请求。
可选地，所述第三消息为所述装置采用广播或组播的方式发送的。
在另一种可能的实现方式中，装置700可以具体为上述实施例中的第一中间节点，装置700可以用于执行上述方法实施例中与第一中间节点对应的各个流程和/或步骤。
具体地，处理单元720，用于在来自目标节点的第一消息中添加所述第一消息在所述装置处的等待时间信息；
收发单元710，用于发送所述第一消息；接收第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在至少一个中间节点中的每个中间节点处的等待时间信息，所述至少一个中间节点包括所述装置；发送所述第二消息。
本申请实施例的通信处理装置，通过中间节点为从目标节点和同步源节点之间传输的消息添加等待时间信息，使得目标节点能够根据消息的发送时间、接收时间以及在中间节点传输过程中的传输时延计算目标节点与同步源节点之间的时钟偏差，进而进行时钟调整，能够提高多跳无线中继场景中节点间的时钟同步的精度，从而提高系统性能。
可选地，所述处理单元720还用于：在发送所述第二消息之前，在所述第二消息中添加所述第二消息在所述装置处的等待时间信息。
可选地，所述收发单元710还用于：在所述在来自目标节点的第一消息中添加所述第 一消息在所述装置处的等待时间信息之前，接收第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；所述处理单元720还用于：在所述第三消息中添加所述第三消息在所述装置处的等待时间信息；所述收发单元710还用于：发送所述第三消息。
可选地，所述第三消息为所述同步源节点和所述装置采用广播或组播的方式发送的。
可选地，所述收发单元710还用于：在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息之前，接收同步请求消息，所述同步请求消息用于请求与所述同步源节点进行时钟同步；转发所述同步请求消息；接收同步应答消息，所述同步应答消息用于表示所述同步源节点接受或拒绝所述目标节点的同步请求；转发所述同步应答消息。
可选地，所述收发单元710还用于：发送第五消息，所述第五消息用于表示所述装置与所述同步源节点之间的跳数，所述跳数用于其他目标节点确定是否与所述装置进行时钟同步。
可选地，所述装置为终端设备或中继节点。
应理解，这里的装置700以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。
还应理解，在另一种可能的实现方式中，上述通信处理装置可以包括芯片，也可以是芯片本身。该芯片可以包括存储器、处理器以及通信接口，该处理器以及该存储器之间通过内部连接通路互相通信，该处理器用于执行该存储器中的代码，当该代码被执行时，该处理器用于执行上述装置700对应的各个流程和/或步骤，此处不再赘述。
图8示出了本申请实施例提供的另一通信处理装置800。该装置800包括处理器810、收发器820和存储器830。其中，处理器810、收发器820和存储器830通过内部连接通路互相通信，该存储器830用于存储指令，该处理器810用于执行该存储器830存储的指令，以控制该收发器820发送信号和/或接收信号。
在一种可能的实现方式中，装置800可以具体为上述实施例中的目标节点，并且可以用于执行上述方法实施例中与目标节点对应的各个步骤和/或流程。
具体地，该收发器820用于接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述装置的第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；该处理器810用于根据所述第一消息在所述装置处的发送时间和所述第二消息，确定所述装置与所述同步源节点之间的时钟偏差。
在另一种可能的实现方式中，装置800可以具体为上述实施例中的同步源节点，并且可以用于执行上述方法实施例中同步源节点对应的各个步骤和/或流程。
具体地，该收发器820用于接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述装置处的接收时间和所述第一消息在所述至少一 个中间节点中的每个中间节点处的等待时间信息。
在另一种可能的实现方式中，装置800可以具体为上述实施例中的第一中间节点，并且可以用于执行上述方法实施例中第一中间节点对应的各个步骤和/或流程。
该处理器810用于在来自目标节点的第一消息中添加所述第一消息在所述装置处的等待时间信息；该收发器820用于发送所述第一消息；接收第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在至少一个中间节点中的每个中间节点处的等待时间信息，所述至少一个中间节点包括所述装置；发送所述第二消息。
应理解，可选地，该存储器830可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器810可以用于执行存储器中存储的指令，并且当该处理器810执行存储器中存储的指令时，该处理器810用于执行上述与该第一中间节点对应的方法实施例的各个步骤和/或流程。
应理解，在本申请实施例中，上述装置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(DSP)、专用集成电路(ASIC)、现场可编程门阵列(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。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件单元组合执行完成。软件单元可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示 或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以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，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (36)

  1. 一种通信处理方法，其特征在于，包括：
    目标节点接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述目标节点的第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
    所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
  2. 根据权利要求1所述的方法，其特征在于，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间和所述第二消息在所述每个中间节点处的等待时间信息；
    所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
    所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息在所述目标节点处的接收时间以及所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
  3. 根据权利要求1所述的方法，其特征在于，在所述目标节点通过至少一个中间节点向同步源节点发送第一消息之前，所述方法还包括：
    所述目标节点接收所述同步源节点通过所述至少一个中间节点发送的第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间以及所述第三消息在所述每个中间节点处的等待时间信息；
    所述目标节点根据所述第三消息，通过所述至少一个中间节点向所述同步源节点发送所述第一消息；
    所述目标节点根据所述第一消息在所述目标节点处的发送时间和所述第二消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差，包括：
    所述目标节点根据所述第一消息在所述目标节点处的发送时间、所述第二消息中的时间信息、所述第三消息在所述目标节点处的接收时间以及所述第三消息中的时间信息，确定所述目标节点与所述同步源节点之间的时钟偏差。
  4. 根据权利要求3所述的方法，其特征在于，所述第三消息为所述同步源节点和所述至少一个中间节点采用广播或组播的方式发送的。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    所述目标节点发送第四消息，所述第四消息用于表示所述目标节点与所述同步源节点之间的跳数，所述跳数用于其他目标节点确定是否与所述目标节点进行时钟同步。
  6. 一种通信处理方法，其特征在于，包括：
    同步源节点接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
    所述同步源节点根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息。
  7. 根据权利要求6所述的方法，其特征在于，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间。
  8. 根据权利要求6所述的方法，其特征在于，在所述同步源节点接收目标节点通过至少一个中间节点发送的第一消息之前，所述方法还包括：
    所述同步源节点通过所述至少一个中间节点向所述目标节点发送第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间。
  9. 根据权利要求8所述的方法，其特征在于，所述第三消息为所述同步源节点采用广播或组播的方式发送的。
  10. 一种通信处理方法，其特征在于，包括：
    第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息；
    所述第一中间节点发送所述第一消息；
    所述第一中间节点接收第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在至少一个中间节点中的每个中间节点处的等待时间信息，所述至少一个中间节点包括所述第一中间节点；
    所述第一中间节点发送所述第二消息。
  11. 根据权利要求10所述的方法，其特征在于，在所述第一中间节点发送所述第二消息之前，所述方法还包括：
    所述第一中间节点在所述第二消息中添加所述第二消息在所述第一中间节点处的等待时间信息。
  12. 根据权利要求10所述的方法，其特征在于，在所述第一中间节点在来自目标节点的第一消息中添加所述第一消息在所述第一中间节点处的等待时间信息之前，所述方法还包括：
    所述第一中间节点接收第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；
    所述第一中间节点在所述第三消息中添加所述第三消息在所述第一中间节点处的等待时间信息；
    所述第一中间节点发送所述第三消息。
  13. 根据权利要求12所述的方法，其特征在于，所述第三消息为所述同步源节点和所述第一中间节点采用广播或组播的方式发送的。
  14. 根据权利要求10至13中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一中间节点发送第五消息，所述第五消息用于表示所述第一中间节点与所述同步源节点之间的跳数，所述跳数用于其他目标节点确定是否与所述第一中间节点进行时钟同步。
  15. 根据权利要求10至14中任一项所述的方法，其特征在于，所述第一中间节点为终端设备或中继节点。
  16. 一种通信处理装置，其特征在于，包括：
    收发单元，用于接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述装置的第一消息在所述同步源节点处的接收时间和所述第一消息在所 述至少一个中间节点中的每个中间节点处的等待时间信息；
    处理单元，用于根据所述第一消息在所述装置处的发送时间和所述第二消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
  17. 根据权利要求16所述的装置，其特征在于，所述第二消息中还携带所述第二消息在所述同步源节点处的发送时间和所述第二消息在所述每个中间节点处的等待时间信息；
    所述处理单元具体用于：
    根据所述第一消息在所述装置处的发送时间、所述第二消息在所述装置处的接收时间以及所述第二消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
  18. 根据权利要求16所述的装置，其特征在于，所述收发单元还用于：
    在通过至少一个中间节点向同步源节点发送第一消息之前，接收所述同步源节点通过所述至少一个中间节点发送的第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间以及所述第三消息在所述每个中间节点处的等待时间信息；
    所述收发单元还用于：
    根据所述第三消息，通过所述至少一个中间节点向所述同步源节点发送所述第一消息；
    所述处理单元具体用于：
    根据所述第一消息在所述装置处的发送时间、所述第二消息、所述第三消息在所述装置处的接收时间以及所述第三消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
  19. 根据权利要求18所述的装置，其特征在于，所述第三消息为所述同步源节点和所述至少一个中间节点采用广播或组播的方式发送的。
  20. 根据权利要求16至19中任一项所述的装置，其特征在于，所述收发单元还用于：
    发送第四消息，所述第四消息用于表示所述装置与所述同步源节点之间的跳数，所述跳数用于其他装置确定是否与所述装置进行时钟同步。
  21. 一种通信处理装置，其特征在于，包括：
    收发单元，用于接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
    所述收发单元还用于：
    根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述装置处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息。
  22. 根据权利要求21所述的装置，其特征在于，所述第二消息中还携带所述第二消息在所述装置处的发送时间。
  23. 根据权利要求21所述的装置，其特征在于，所述收发单元还用于：
    在接收目标节点通过至少一个中间节点发送的第一消息之前，通过所述至少一个中间节点向所述目标节点发送第三消息，所述第三消息中携带所述第三消息在所述装置处的发送时间。
  24. 根据权利要求23所述的装置，其特征在于，所述第三消息为所述装置采用广播 或组播的方式发送的。
  25. 一种通信处理装置，其特征在于，包括：
    处理单元，用于在来自目标节点的第一消息中添加所述第一消息在所述装置处的等待时间信息；
    收发单元，用于发送所述第一消息；
    接收第二消息，所述第二消息中携带所述第一消息在所述同步源节点处的接收时间和所述第一消息在至少一个中间节点中的每个中间节点处的等待时间信息，所述至少一个中间节点包括所述装置；
    发送所述第二消息。
  26. 根据权利要求25所述的装置，其特征在于，所述处理单元还用于：
    在发送所述第二消息之前，在所述第二消息中添加所述第二消息在所述装置处的等待时间信息。
  27. 根据权利要求25所述的装置，其特征在于，所述收发单元还用于：
    在所述在来自目标节点的第一消息中添加所述第一消息在所述装置处的等待时间信息之前，接收第三消息，所述第三消息中携带所述第三消息在所述同步源节点处的发送时间；
    所述处理单元还用于：
    在所述第三消息中添加所述第三消息在所述装置处的等待时间信息；
    所述收发单元还用于：
    发送所述第三消息。
  28. 根据权利要求27所述的装置，其特征在于，所述第三消息为所述同步源节点和所述装置采用广播或组播的方式发送的。
  29. 根据权利要求25至28中任一项所述的装置，其特征在于，所述收发单元还用于：
    发送第五消息，所述第五消息用于表示所述装置与所述同步源节点之间的跳数，所述跳数用于其他目标节点确定是否与所述装置进行时钟同步。
  30. 根据权利要求25至29中任一项所述的装置，其特征在于，所述装置为终端设备或中继节点。
  31. 一种通信处理装置，其特征在于，包括：
    收发器，用于接收同步源节点通过至少一个中间节点发送的第二消息，所述第二消息中携带来自所述装置的第一消息在所述同步源节点处的接收时间和所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
    处理器，用于根据所述第一消息在所述装置处的发送时间和所述第二消息中的时间信息，确定所述装置与所述同步源节点之间的时钟偏差。
  32. 一种通信处理装置，其特征在于，包括：
    收发器，用于接收目标节点通过至少一个中间节点发送的第一消息，所述第一消息携带所述第一消息在所述至少一个中间节点中的每个中间节点处的等待时间信息；
    所述收发器还用于：
    根据所述第一消息，通过所述至少一个中间节点向所述目标节点发送第二消息，所述第二消息中携带所述第一消息在所述装置处的接收时间和所述第一消息在所述至少一个 中间节点中的每个中间节点处的等待时间信息。
  33. 一种通信处理系统，其特征在于，包括：权利要求16至20中任一项所述的装置、权利要求21至24中任一项所述的装置以及权利要求25至30中任一项所述的装置。
  34. 一种计算机可读介质，用于存储计算机程序，其特征在于，所述计算机程序包括用于实现上述权利要求1至15中任一项所述的方法的指令。
  35. 一种计算机程序产品，所述计算机程序产品中包括计算机程序代码，其特征在于，当所述计算机程序代码在计算机上运行时，使得计算机实现上述权利要求1至15中任一项所述的方法。
  36. 一种芯片，其特征在于，包括：处理器，用于读取存储器中存储的指令，当所述处理器执行所述指令时，使得所述芯片实现上述权利要求1至15中任一项所述的方法。
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