WO2021142767A1 - Procédé de communication et dispositif de communication - Google Patents

Procédé de communication et dispositif de communication Download PDF

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Publication number
WO2021142767A1
WO2021142767A1 PCT/CN2020/072720 CN2020072720W WO2021142767A1 WO 2021142767 A1 WO2021142767 A1 WO 2021142767A1 CN 2020072720 W CN2020072720 W CN 2020072720W WO 2021142767 A1 WO2021142767 A1 WO 2021142767A1
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WIPO (PCT)
Prior art keywords
data packet
service
path
sequence number
unicast
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PCT/CN2020/072720
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English (en)
Chinese (zh)
Inventor
葛翠丽
杨艳梅
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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 CN202080069313.6A priority Critical patent/CN114467316B/zh
Priority to PCT/CN2020/072720 priority patent/WO2021142767A1/fr
Publication of WO2021142767A1 publication Critical patent/WO2021142767A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • This application relates to the field of communications, and in particular to a communication method and communication device.
  • the terminal device A and the terminal device group B respectively receive multiple data packets of the same service S from the user plane network element through the same base station on the unicast path and the multicast path, because the user plane network element is on the unicast path and the multicast path
  • the speed of sending data packets of service S to the base station is different, and after the base station receives the data packets of service S on the corresponding path, it sends service S to terminal equipment A on the unicast path and to terminal equipment group B on the multicast path.
  • the different speeds and different buffers of data packets will cause the data packets of service S sent by the base station on the two paths to be out of sync.
  • the terminal device A exists because of the two Data packets sent on two paths are out of sync, causing packet loss or business interruption.
  • terminal device A uses the multicast path corresponding to terminal device group B to receive multiple data packets of service S, how does the base station determine that the data packets sent on the unicast path and the multicast path are synchronized, so that terminal device A can receive data packets from
  • the smooth integration of the unicast path into the multicast path of the terminal device group B becomes a problem to be solved urgently.
  • the present application provides a communication method and communication device, which can smoothly merge terminal equipment from a unicast path to a multicast path.
  • a communication method including: an access network device receives synchronization indication information from a user plane network element UPF, the synchronization indication information is used to indicate that a service data packet of a first service is on a multicast path and a first terminal device
  • the unicast path achieves transmission synchronization, the unicast path uses unicast to transmit the service data packet of the first service to the first terminal device, and the multicast path uses the multicast method to transmit the service data of the first service to the first terminal device group Package, the first terminal device group includes at least one terminal device;
  • the access network device sends first instruction information to the first terminal device according to the synchronization instruction information, and the first instruction information is used to instruct the first terminal device to receive the first terminal device through the multicast path A business data package of a business.
  • the access network device determines that the data packet after the synchronization instruction information reaches the transmission synchronization according to the synchronization instruction information sent by the user plane network element, so that the access network device can send the first terminal device to the first terminal device according to the received synchronization instruction information.
  • Send the first instruction information so that the first terminal device starts to receive the data packets of the first service on the multicast path after successfully receiving the first instruction, so as to ensure that the first terminal device can smoothly merge from the unicast path to the access network. Multicast path.
  • the access network device receiving synchronization indication information from the UPF includes: the access network device receiving synchronization indication information from the UPF via a unicast path and/or a multicast path.
  • the access network device may send the first indication information to the first terminal device when receiving synchronization indication information on two paths; or the access network device may only receive synchronization indication information on one path.
  • the indication information the first indication information is sent to the first terminal device, so that the first terminal device can start to receive the data packet of the first service on the multicast path more flexibly.
  • the access network device sends the unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the service of the first service on the unicast path data pack.
  • the access network device sending the unicast stop instruction information to the UPF can cause the UPF to stop on the unicast path and continue to send the data packets of the first service on the unicast path, thereby saving UPF transmission resources.
  • the synchronization indication information includes an empty service data packet, a synchronization data packet, or an end flag packet.
  • a communication method including: the user plane network element UPF determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path of the first terminal device, and the unicast path uses unicast
  • the service data packet of the first service is transmitted to the first terminal device in the mode, and the multicast path uses the multicast mode to transmit the service data packet of the first service to the first terminal device group.
  • the first terminal device group includes at least one terminal device;
  • the access network device of the first terminal device sends synchronization indication information, where the synchronization indication information is used to indicate that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • transmission synchronization means that the user plane network element is on the unicast path and the multicast path at a certain moment.
  • the service data packet in the first data packet to be sent is the same data packet
  • the user plane network element sends synchronization indication information to the access network device, which is used to indicate that the data packets on the two paths achieve transmission synchronization, and the access network
  • the device can then determine when the data packets sent on the two paths reach transmission synchronization according to the synchronization indication information, thereby controlling the first terminal device to smoothly merge from the unicast path to the multicast path according to the synchronization indication information.
  • UPF determines that the service data of the first service achieves transmission synchronization on the multicast path and the unicast path, including: when the UPF is to be sent on the unicast path When a service data packet of the first service is the same as the first service data packet of the first service to be sent by UPF on the multicast path, UPF determines that the service data packet of the first service is on the multicast path and the unicast path The transmission synchronization is achieved; or when the sequence number of the first service data packet of the first service to be sent by the UPF on the unicast path is the same as the sequence number of the first service data packet of the first service to be sent by the UPF on the multicast path At the same time, UPF determines that the service data of the first service has achieved transmission synchronization on the multicast path and the unicast path.
  • the user plane network element can judge that the UPF achieves transmission synchronization on the two paths based on the same service data packet or the same sequence number of the data packet in the first data packet to be sent on the multicast path and the unicast path .
  • the UPF sending synchronization indication information to the access network device of the first terminal device includes: the UPF sending synchronization indication information on a unicast path and a multicast path.
  • the user plane network element simultaneously sends synchronization indication information on two paths, so that the access network device can ensure that the first terminal device can smoothly merge from the unicast path to the access according to the synchronization indication information on the two paths.
  • the multicast path of the network The multicast path of the network.
  • the UPF when the UPF determines that the service data packet of the first service reaches the transmission synchronization on the multicast path and the unicast path, the UPF stops sending the first service on the unicast path.
  • Business data package for business when the UPF determines that the service data packet of the first service reaches the transmission synchronization on the multicast path and the unicast path, the UPF stops sending the first service on the unicast path.
  • the UPF when the UPF reaches the transmission synchronization on the two paths, the UPF stops sending the data packets of the first service on the unicast path, so as to save the transmission resources of the UPF and reduce the energy consumption.
  • the UPF receives the unicast stop instruction information sent by the access network device, which can stop the UPF from sending data packets of the first service on the unicast path, so as to save UPF transmission resources and reduce energy consumption.
  • the synchronization indication information includes an empty service data packet, a synchronization data packet, or an end flag packet.
  • a communication method including: the access network device receives the first data packet of the first service from the user plane network element UPF through the unicast path of the first terminal device, and the unicast path uses the unicast method to transmit the first data packet of the first service.
  • the first terminal device transmits the service data packet of the first service; the access network device receives the second data packet of the first service from the user plane network element through the multicast path, and the multicast path uses the multicast mode to transmit to the first terminal equipment group
  • the first terminal device group includes at least one terminal device; the access network device determines that the service data packet of the first service is in the multicast path and the unicast path according to the first data packet and the second data packet The transmission synchronization is achieved; the access network device sends first indication information to the first terminal device, where the first indication information is used to instruct the first terminal device to receive the service data packet of the first service through the multicast path.
  • the access network device determines that the data packets on the two paths have reached the transmission synchronization according to the first data packet received on the unicast path and the second data packet received on the multicast path. After the packet reaches the transmission synchronization, the access network device sends the first indication information to the first terminal device. After the first terminal device successfully receives the first indication information, the first terminal device starts to receive the service data of the first service through the multicast path Packet, so that the first terminal device can smoothly merge from the unicast path to the multicast path, avoiding the fusion of the unicast path to the multicast path when the access network device does not know when the data packets of the two paths are synchronized Packet loss or business interruption during the path.
  • the first data packet includes the sequence number of the first data packet and a first service data packet
  • the second data packet includes the second data The sequence number of the packet and the second service data packet, where the first service data packet and the second service data packet belong to the service data packet of the first service.
  • the sequence number of the first data packet is the sequence number of the first service data packet
  • the sequence number of the second data packet is the second service data The serial number of the package.
  • the sequence numbers of the same service data packets are the same.
  • the access network device can be based on the first data packet on the two paths.
  • the sequence number of the second data packet and the second data packet determine when the data packets on the two paths reach transmission synchronization, so that the first terminal device smoothly merges from the unicast path to the multicast path.
  • the sequence number of the first data packet includes the absolute sequence number and the first relative offset value of the first data packet
  • the sequence number of the second data packet includes the sequence number of the second data packet.
  • the absolute sequence number and the second relative offset value the absolute sequence number of the first data packet is the transmission sequence number of the first data packet on the unicast path
  • the first relative offset value is the absolute sequence number of the first data packet and the first service data
  • the difference between the sequence numbers of the packets, the absolute sequence number of the second data packet is the sending sequence number of the second data packet on the multicast path
  • the second relative offset value is the absolute sequence number of the second data packet and the second service data packet
  • the difference between the serial numbers of the first data packet; the serial number of the first data packet is the sum of the absolute serial number of the first data packet and the first relative offset
  • the serial number of the second data packet is the absolute serial number of the second data packet and the second relative The sum of the offset values.
  • the second data packet sequence number is the absolute sequence number and the second The sum of the relative offset values (that is, the sequence number of the service data packet in the second data packet). Since the sequence numbers of the same service data packets sent on the two paths are the same, the access network device can be based on the order of the two paths. The sequence numbers of the first data packet and the second data packet determine when the data packets on the two paths reach transmission synchronization, so that the first terminal device smoothly merges from the unicast path to the multicast path.
  • the sequence number of the service data packet is the receiving sequence number of the service data packet for the first service on the UPF.
  • the first data packet is the first data packet to be sent by the access network device on the unicast path
  • the second data packet is the access network device in the multi The first data packet to be sent on the broadcast path
  • the access network device determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path, including: When the first service data packet is the same as the second service data packet, the access network device determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path; or, when the sequence number of the first data packet is the same as When the sequence numbers of the second data packets are the same, the access network device determines that the service data packets of the first service achieve transmission synchronization on the multicast path and the unicast path.
  • the access network device can determine that the access network device is in the two paths based on the same service data packet or the same sequence number of the service data packet in the first data packet to be sent on the multicast path and the unicast path. The transmission synchronization is reached.
  • the first data packet is the last data packet successfully received by the access network device on the unicast path
  • the second data packet is the access network device in the multicast path.
  • the access network device can determine that the access network device is on the two paths according to the same service data packet or the same sequence number of the service data packet in the last data packet successfully received on the multicast path and the unicast path The transmission synchronization is achieved, so that the first terminal device smoothly merges from the unicast path to the multicast path.
  • the access network device sends the unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the service of the first service on the unicast path data pack.
  • the access network device sends a unicast stop instruction to the UPF after achieving transmission synchronization, so as to reduce the use of UPF transmission resources and reduce energy consumption.
  • the method before the service data of the first service achieves transmission synchronization on the multicast path and the unicast path, the method further includes: the access network device according to the unicast path and the unicast path The sequence number of the data packet of the first service or the number of buffers on the multicast path adjusts the sending rate of the data packet of the first service.
  • the access network device adjusts the sending rate of the data packets on the two paths, which can speed up the data packets on the two paths to achieve synchronization, so that the first terminal device It is possible to stop using the first unicast path to receive the data packets of the first service, and only use the multicast path to receive the data packets of the first service, reducing the use of transmission resources of the access network equipment and reducing energy consumption.
  • a communication method including: a user plane network element UPF receives a service data packet of a first service; and the UPF accesses the first terminal device through the unicast path of the first terminal device according to the service data packet.
  • the network device sends the first data packet of the first service, and the first data packet carries the sequence number of the first data packet and the first service data packet; the UPF sends the first service data packet to the access network device through the multicast path according to the service data packet.
  • a second data packet, the second data packet carrying the sequence number of the second data packet and a second service data packet, the first service data packet and the second service data packet belong to the service data packet of the first service;
  • the unicast path uses the unicast mode to transmit the service data packet of the first service to the first terminal device
  • the multicast path uses the multicast mode to transmit the service data packet of the first service to a group of terminal devices.
  • the data packets sent by the user plane network element to the access network device on the unicast path and the multicast path carry the sequence number of the data packet
  • the access network device can send the data packets on the two paths according to the user plane network element.
  • the data packet sequence number determines when the access network reaches the transmission synchronization on the two paths, so that the first terminal device smoothly merges from the unicast path to the multicast path, and avoids that the access network equipment does not know the two path data packets
  • the packet loss or service interruption is generated during the process.
  • the sequence number of the first data packet is the sequence number of the first service data packet
  • the sequence number of the second data packet is the sequence number of the second service data packet
  • the sequence numbers of the same service data packets are the same, and the access network device can determine when the data packets on the two paths are based on the sequence numbers of the service data packets in the first data packet and the second data packet on the two paths. Achieve transmission synchronization.
  • the sequence number of the first data packet includes the absolute sequence number and the first relative offset value of the first data packet
  • the sequence number of the second data packet includes the sequence number of the second data packet.
  • the absolute sequence number and the second relative offset value where the absolute sequence number of the first data packet is the transmission sequence number of the first data packet on the unicast path, and the first relative offset value is the absolute sequence number of the first data packet and the first
  • the absolute sequence number of the second data packet is the sending sequence number of the second data packet on the multicast path
  • the second relative offset value is the absolute sequence number of the second data packet and the second service The difference between the sequence numbers of the data packets.
  • the first data packet sequence number is the sum of the absolute sequence number and the first relative offset value (that is, the sequence number of the service data packet in the first data packet), and the second data packet sequence number is the absolute sequence number and the second relative offset value.
  • the sum of shift values that is, the sequence number of the service data packet in the second data packet. Since the sequence numbers of the same service data packet are the same, the access network device can be based on the first data packet and the second data packet on the two paths. The sequence number determines when the data packets on the two paths reach transmission synchronization.
  • the sequence number of the service data packet is the receiving sequence number of the service data packet for the first service on the UPF.
  • the UPF receives the unicast stop instruction information from the access network device; the UPF stops sending the service data of the first service on the unicast path according to the unicast stop instruction information Bag.
  • the UPF stops sending the data packets of the first service on the unicast path according to the unicast stop instruction information, so as to save the sending resources of the UPF and reduce the energy consumption.
  • a communication device is provided, and the communication device is configured to execute the communication method provided in the first aspect or the third aspect.
  • the communication device may include a module for executing the communication method provided in the first aspect or the third aspect.
  • a communication device is provided, and the communication device is configured to execute the communication method provided in the second aspect or the fourth aspect.
  • the communication device may include a module for executing the communication method provided in the second aspect or the fourth aspect.
  • a communication device including a processor.
  • the processor is coupled with the memory and can be used to execute instructions in the memory to implement the communication method in any one of the first aspect or the third aspect described above in the first aspect or the third aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled with the communication interface, and the communication interface is used for inputting and/or outputting information.
  • the information includes at least one of instructions and data.
  • the communication device is an access network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip or a chip system.
  • the communication interface may be an input/output interface, which may be an input/output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system, etc.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • the communication device is a chip or a chip system configured in an access network device.
  • a communication device including a processor.
  • the processor is coupled with the memory, and can be used to execute instructions in the memory to implement the communication method in any one of the foregoing second aspect or fourth aspect and any possible implementation manner of the second aspect or fourth aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled with the communication interface, and the communication interface is used for inputting and/or outputting information.
  • the information includes at least one of instructions and data.
  • the communication device is a user plane network element.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip or a chip system configured in a user plane network element.
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits, etc.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter
  • the circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • processors there are one or more processors, and one or more memories.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes a computer to execute the first aspect to The fourth aspect and the method in any one of the possible implementation manners of the first to fourth aspects.
  • a computer program also called code, or instruction
  • Fig. 6 is a schematic interaction diagram of another communication method provided by an embodiment of the present application.
  • Fig. 7 is a schematic diagram of the data packets of the first service being transmitted on the unicast path and the multicast path according to relative numbers.
  • wearable devices can also be called wearable smart devices, which are the general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories.
  • Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements part of the functions of gNB, and the DU implements part of the functions of gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implements radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and realizes the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the data network element may be a data network (DN) network element.
  • DN data network
  • the data network network element may still be a DN network element, or may also have other names, which is not limited in this application.
  • Session management network element 160 Mainly used for session management, Internet Protocol (IP) address allocation and management of user equipment, selection of end points that can manage user plane functions, policy control and charging function interfaces, and downlink Data notification, etc.
  • IP Internet Protocol
  • the application network element may be a network slice selection function (NSSF) network element.
  • NSSF network slice selection function
  • the application network element may still be an NSSF network element, or may also have other names, which is not limited by this application.
  • FIG. 1 is just an example and does not constitute any limitation to the protection scope of the present application.
  • the communication method provided by the embodiment of the present application may also involve a network element not shown in FIG. 1.
  • the user equipment is connected to the AMF through the N1 interface
  • the RAN is connected to the AMF through the N2 interface
  • the RAN is connected to the UPF through the N3 interface.
  • the UPF is connected through the N9 interface
  • the UPF is interconnected with the DN through the N6 interface.
  • SMF controls UPF through the N4 interface.
  • AMF is connected to SMF through the N11 interface.
  • Radio network temporary identity an identity of different UEs in the signal information between the UE and the base station.
  • UPF transmits multicast service data packets on the QoS flow of terminal device A.
  • the RAN uses multicast scheduling on the air interface for the multicast service data packets received from this QoS flow (black The method shown by the arrow) is sent to the terminal devices A, B, and C that receive the multicast service.
  • the SMF needs to configure specific packet detection and forwarding rules to the UPF, and send a multicast service data packet to the RAN side through a QoS flow; when the application server sends the multicast service to the UPF
  • the data packet is sent independently to each (per) terminal device, that is, the UPF receives the data packet of the multicast service sent to multiple terminal devices, and selects the data packet of the multicast service of one of the terminal devices.
  • the destination IP address of the data packet of the multicast service is replaced with the IP address used to transmit the multicast service; when the application server sends a copy of the multicast service data to the UPF, the UPF can communicate with the server of the multicast service through the UPF
  • the tunnel receives the data of the multicast service, or the UPF can receive the data of the multicast service in a multicast manner, and the UPF sends the received data packet to the RAN side through a QoS flow.
  • the transmission of multicast service data on the public N3 QoS flow that can transmit the multicast service between the UPF and the RAN can be further understood as the UPF and the RAN N3 in the third scenario above.
  • the data of the multicast service is transmitted on the connection, and the G-RNTI is used on the air interface to schedule the data of the multicast service for multiple terminal devices requesting the multicast service under the base station.
  • the base station uses different G-RNTIs for different groups of UEs.
  • Figure 3 is a schematic diagram of a terminal device switching from the multicast QoS flow of the source base station to the multicast QoS flow of the target base station.
  • Terminal devices A, B, and C receive multicast service data packets from QoS flow 1 on the source base station side.
  • the N3 connection of the multicast QoS flow 1 can be the N3 connection of the unicast QoS flow of terminal device A or the UPF and N3 connection of public QoS flow between AN1.
  • terminal device C uses its own unicast QoS flow 3 to transmit multicast service data packets, and at the same time, uses the dedicated RNTI 2 of the target base station to terminal device C to receive multicast service data packets.
  • the data packet of the multicast service sent by AN2 on the dedicated RNTI 2 of the terminal device C is the 9th packet
  • the data packet of the broadcast service is the 12th packet.
  • the multicast service data packet sent by UPF to terminal device C of AN2 through QoS flow 3 and the multicast data packet sent to AN2 by UPF through QoS flow X will also be out of sync.
  • UPF sends unicast to terminal device C of AN2.
  • the last data packet of the multicast service of QoS flow 3 is the 12th packet
  • the last data packet of the multicast service sent to the multicast QoS flow X of AN2 is the 15th packet.
  • the terminal device C when the terminal device C is added to the multicast QoS flow X on the target base station side, it is impossible to determine whether the data packet reaches the transmission synchronization, which causes the terminal device C to receive too much of the QoS flow X. After the data packet is broadcast, the application service is disturbed, for example, packet loss occurs, which causes service interruption and other problems.
  • this application optimizes the method of converged transmission of unicast path and multicast path, so that the terminal device can smoothly converge to the target multicast path.
  • the context of the multicast path includes: the data packet with the sequence number 1 sent on the unicast path is the data packet with the first service sequence number 3 in the UPF, and the data packet with the first service sequence number 5 is currently sent to the UPF. A total of them are sent 3 data packets, the data packet with the first service sequence number 6 to be sent in the UPF.
  • the unicast path is currently sent to the data packet with the first service sequence number 4 in the UPF, and the multicast path is currently sent to In the UPF, if the first service sequence number is 5, the UPF can speed up the packet sending speed on the unicast path.
  • the user plane network element sends synchronization indication information to the access network device.
  • the user plane network element When the UPF determines that the service data packet of the first service has reached transmission synchronization on the multicast path and the unicast path, the user plane network element sends synchronization indication information to the access network device.
  • the UPF stops sending the service data packet of the first service on the unicast path.
  • S430 The access network device sends first indication information to the first terminal device.
  • the access network device sends the first indication information to the first terminal device according to the received synchronization indication information.
  • the first terminal device receives the first indication information sent by the access network device, where the first indication information is used to instruct the first terminal device to receive the service data packet of the first service through the multicast path.
  • the access network device first receives the second synchronization packet and subsequent data packets on the multicast path, and the access network device has not received the second synchronization packet on the multicast path before The buffered data packets, that is, the data packets before the second synchronization packet on the multicast path of the access network device have been successfully sent.
  • the access network device sends the first indication information to the first terminal device
  • the first indication information includes the G-RNTI of the first terminal device group.
  • the access network device After the first terminal device successfully receives the G-RNTI, the access network device starts to send the data packet after the second synchronization packet on the multicast path, The first terminal device starts to receive the data packet on the multicast path through the G-RNTI, and the access network device stops sending the data packet after the first synchronization packet on the unicast path. It should be understood that at this time, the terminal device that receives the multicast service data packet from the multicast path originally has some buffers, so letting the first terminal device group wait for a limited time will not cause the service interruption of the first terminal device group.
  • the access network device waits until After receiving the second synchronization packet on the multicast path, the access network device sends the first indication information to the first terminal device.
  • the first indication information includes the G-RNTI of the first terminal device group. After receiving the G-RNTI, the first terminal device receives the data packet on the multicast path through the G-RNTI, and the access network device stops sending the data packet after the first synchronization on the unicast path. It should be understood that, at this time, the first terminal device may receive a data packet previously received from the unicast path, and the first terminal device may discard the received duplicate packet without causing service interruption.
  • the access network device receives any one of the first synchronization packet or the second synchronization packet, and the data packet before the synchronization packet on the path corresponding to the synchronization packet has been sent, then The access network device sends first indication information to the first terminal device.
  • the first indication information includes the G-RNTI of the first terminal device group.
  • the first terminal device passes the G-RNTI -RNTI receives data packets on the multicast path.
  • the access network device first receives the second synchronization packet and the data packets before the second synchronization packet on the multicast path have been successfully sent, and the first terminal device starts to receive the multicast through G-RNTI according to the first indication information.
  • the access network device continues to send the data packets on the unicast path to the first terminal device, that is, the first synchronization packet on the unicast path.
  • a terminal device receives the data packets of the first service from the unicast path and the multicast path at the same time. In this way, it is possible that the first terminal device may start to receive the multicast before the data packet before the first synchronization packet has been received.
  • the access network device adjusts the unicast path according to the unicast path and the number of data packets buffered by the multicast path on the access network device
  • the transmission speed of the data packet corresponding to the multicast path as shown in Figure 5, the access network equipment finds that the first data packet on the unicast path has more buffers, it can adjust the air interface transmission resource priority/speed up the scheduling on the unicast path The first packet.
  • the UPF saves the context information of the sequence numbers of the data packets sent on the unicast path and the multicast path, as well as the dual synchronization packet mechanism on the unicast and multicast paths, which can solve the problem of unicast and multi-
  • the problem of non-synchronization of the service data packets of the same service sent on the broadcast path ensures that the first terminal device can smoothly merge from the unicast path to the multicast path of the access network.
  • the user plane network element sets the sequence number of the first data packet as the sequence number of the first service data packet, and sets the sequence number of the second data packet as the sequence number of the second service data packet.
  • the user plane network element sets the sequence number of the first data packet sent on the unicast path to the sequence number of the service data packet (ie, the first service data packet) in the first data packet, and sets the second data packet sent on the multicast path
  • the serial number is the serial number of the business data packet (ie, the second business data packet) in the second data packet.
  • the serial numbers of the first business data packet and the second business data packet can be the corresponding business data packet in the user plane network element Receive serial number, which can be set by UPF.
  • the first data packet carries the sequence number of the first data packet and the first service data packet
  • the second data packet carries the sequence number of the second data packet and the second service data packet.
  • the first data packet and the second data packet may be GTP-U data packet.
  • the unicast path is the path used to transmit the service data packet of the first service between the first terminal device, the access network device and the user plane network
  • the multicast path is the first terminal device group, the access network device and the user A path used to transmit service data packets of the first service between plane network elements, where the first device group includes multiple terminal devices.
  • the first service in UPF includes service data packets with serial numbers 1, 2, 3, 4, 5..., among which 1, 2, 3, 4, 5... are serial numbers
  • the receiving sequence number of a service data packet on the UPF The sequence numbers of the data packets sent by UPF on the unicast path and the multicast path are shown in Figure 7.
  • UPF sets the sequence numbers of the service data packets in the first data packet and the second data packet in the UPF as the first data packet and The sending sequence number of the second data packet.
  • the sequence number 3 is used as the UPF in The sequence number of the second data packet sent on the unicast path.
  • S620 The user plane network element sends the first data packet and the second data packet to the access network device.
  • the access network device receives the first data packet on the unicast path, and receives the second data packet on the multicast path.
  • the access network device determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • the access network device determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path according to the sequence number of the first data packet and the sequence number of the second data packet.
  • the network-connected device records the sequence number of the data packet that reaches the transmission synchronization.
  • the access network device determines that the service data of the first service is transmitted synchronously on the multicast path and the unicast path according to the sequence number of the first data packet and the sequence number of the second data packet, and the access network records The sequence number of the data packet that reached the transmission synchronization.
  • sequence numbers of the first data packet and the second data packet are the same, which indicates that the service data packet in the first data packet and the service data packet in the second data packet are the same data packet.
  • the unicast stop instruction information may carry identification information of the unicast path, and may also carry the sequence number of the data packet that achieves transmission synchronization.
  • the UPF receives the unicast stop instruction information, and stops sending the data packet of the first service on the unicast path.
  • S640 The access network device sends first indication information to the first terminal device.
  • the access network device After the access network device determines that the service data packets of the first service are synchronized in transmission on the multicast path and the unicast path, the access network device sends first indication information to the first terminal device, where the first indication information is used to indicate the first The terminal device receives the service data of the first service through the multicast path.
  • the access network device when the transmission synchronization is achieved in the first case, the access network device sends first indication information to the first terminal device; when the transmission synchronization is achieved in the second case, the access network device is waiting on the unicast path.
  • the first data packet sent is the first data packet that reaches transmission synchronization
  • the first data packet to be sent by the access network device on the multicast path is the second data packet that reaches transmission synchronization
  • access The network device sends the first indication information to the first terminal device.
  • the first terminal device receives the first indication information sent by the first terminal device.
  • the first indication information includes the G-RNTI for the first terminal device group to receive the first service.
  • the first terminal device After the first terminal device successfully receives the G-RNTI, the first terminal device receives the first terminal device on the multicast path through the G-RNTI.
  • a business data package of a business When the first terminal device receives the service data packet of the first service through the multicast path, the access network device stops sending the data packets after the sequence number that reaches the transmission synchronization on the unicast path, and only sends it on the multicast path to achieve the transmission synchronization. The data packet after the sequence number.
  • the access network equipment before the access network equipment achieves the transmission synchronization in the first case and the second case on the multicast path and the unicast path, the access network equipment is in the access network according to the unicast path and the multicast path.
  • the size of the sequence number or the number of buffers of the data packets on the device is adjusted to adjust the sending speed of the data packets corresponding to the unicast path and the multicast path.
  • the access network device finds that there are more buffers of data packets on the unicast path.
  • the air interface can be adjusted to send resource priority/speed up the scheduling of data packets on the unicast path.
  • the access network device after the access network device achieves the transmission synchronization in the second case on the multicast path and the unicast path, the access network device performs buffering on the multicast path and the unicast path before reaching the transmission synchronization. According to the size of the sequence number of the data packet or the number of buffers, the sending speed of the data packet corresponding to the unicast path and the multicast path is adjusted.
  • the UPF sets the sequence numbers of the data packets on the two paths as the receiving sequence numbers of the service data packets in the corresponding data packets on the UPF, and the access network equipment can be based on the sequence numbers of the data packets sent on the unicast and multicast paths. It is determined that the service data of the first service on the two paths are synchronized in transmission. After the data packets of the two paths are synchronized in transmission, the first terminal device is added to the first terminal device group, and the first terminal device starts to use the multicast path to receive The data packet of the first service ensures that the terminal device can smoothly merge from the unicast path to the multicast path of the access network.
  • FIG. 8 is a schematic interaction diagram of yet another communication method provided by an embodiment of the present application.
  • the user plane network element sets the absolute sequence number and the first relative offset value of the first data packet on the unicast path, and the user plane network element sets the absolute sequence number and the second relative offset value of the second data packet on the multicast path. value.
  • the user plane network element sets the sequence number of the first data packet sent on the unicast path.
  • the sequence number of the first data packet includes the absolute sequence number and the first relative offset value of the first data packet on the unicast path.
  • the first data packet It carries the sequence number of the first data packet and the first service data packet.
  • the absolute sequence number is that the data packets sent to the access network device on each QoS flow are independently numbered by the user plane network element according to the packet sending sequence.
  • the absolute number of the data packet sent to the access network device on a QoS flow by the UPF is the same as that of the UPF.
  • the absolute number of the data packet sent to the access network device on another QoS flow is not associated.
  • the absolute sequence number of the first data packet on the unicast path is that the user plane network element absolutely numbers the first data packet according to the order in which the first data packet is sent on the unicast path.
  • Figure 5 is an example.
  • UPF sets the unicast path.
  • the absolute sequence number of the first data packet sent is 1
  • the absolute sequence number of the second data packet sent is 2, and so on.
  • the first relative offset value is the difference between the absolute number of the first data packet and the reception sequence number of the service data packet in the first data packet (that is, the first service data packet) in the user plane network element.
  • Figure 5 is an example.
  • the user plane network element sets the sequence number of the second data packet sent on the multicast path.
  • the sequence number of the second data packet includes the absolute sequence number and the second relative offset value of the second data packet on the multicast path.
  • the second data packet carries the sequence number of the first data packet and the second service data packet.
  • Figure 5 is an example.
  • UPF sets the absolute sequence number of the third packet sent on the multicast path to 3.
  • the second relative offset value is the difference between the absolute number of the second data packet and the reception sequence number of the service data packet in the second data packet (that is, the second service data packet) in the user plane network element, then the multicast path
  • S820 The user plane network element sends the first data packet and the second data packet to the access network device.
  • the user plane network element sends the first data packet to the access network device on the unicast path, and sends the second data packet to the access network device on the multicast path.
  • the access network device receives the first data packet on the unicast path, and receives the second data packet on the multicast path.
  • the UPF stops sending the first data packet on the unicast path.
  • Data packet where the first data packet serial number is the sum of the absolute serial number of the first data packet and the first relative offset value, and the second data packet serial number is the sum of the absolute serial number of the second data packet and the second relative offset value .
  • the UPF can be based on the data packets on the unicast path and the multicast path.
  • the sequence number size or the number of buffers can be adjusted to adjust the speed of sending packets on the two paths. As shown in Figure 7, the sequence number of data packets sent by UPF on the unicast path is smaller, and UPF can speed up the packet sending speed on the unicast path.
  • the access network device determines that the service data of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • the second data packet is the first data packet to be sent by the access network device on the multicast path
  • the access network device determines that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path, and the access network can record this The sequence number of the data packet that reached the transmission synchronization.
  • the connection According to the sequence number of the first data packet and the sequence number of the second data packet, the network access device determines that the service data of the first service achieves transmission synchronization on the multicast path and the unicast path, and the access network can use the sequence number as the reach The sequence number of the synchronized data packet.
  • the access network device when the data packet sent by the access network device reaches the transmission synchronization, the access network device sends the unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the first data packet on the unicast path.
  • the access network device sends the unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the first data packet on the unicast path.
  • the unicast stop instruction information may carry the identification information of the unicast path, and may also carry the sequence number of the data packet that achieves transmission synchronization.
  • the UPF receives the unicast stop instruction information, and stops sending the data packet of the first service on the unicast path.
  • S840 The access network device sends first indication information to the first terminal device.
  • the access network device After the access network device determines that the service data of the first service has reached transmission synchronization on the multicast path and the unicast path, the access network device sends first indication information to the first terminal device, where the first indication information is used to instruct the first terminal The device receives the service data of the first service through the multicast path.
  • the access network device when the transmission synchronization is achieved in the first case, the access network device sends first indication information to the first terminal device; when the transmission synchronization is achieved in the second case, the access network device is waiting on the unicast path.
  • the first data packet sent is the first data packet that reaches transmission synchronization
  • the first data packet to be sent by the access network device on the multicast path is the second data packet that reaches transmission synchronization
  • access The network device sends the first indication information to the first terminal device.
  • the first terminal device receives the first indication information sent by the first terminal device.
  • the first indication information includes the G-RNTI for the first terminal device group to receive the first service.
  • the first terminal device After the first terminal device successfully receives the G-RNTI, the first terminal device receives the first terminal device on the multicast path through the G-RNTI.
  • Business data of a business When the first terminal device receives the service data packet of the first service through the multicast path, the access network device stops sending the data packets after the sequence number that reaches the transmission synchronization on the unicast path, and only sends it on the multicast path to achieve the transmission synchronization. The data packet after the sequence number.
  • the access network equipment before the access network equipment achieves the transmission synchronization in the first case and the second case on the multicast path and the unicast path, the access network equipment is in the access network according to the unicast path and the multicast path.
  • the size of the sequence number or the number of buffers of the data packets on the device adjust the transmission speed of the data packets corresponding to the unicast path and the multicast path, as shown in Figure 7, the access network device finds that the first data packet on the unicast path has more buffers , You can adjust the air interface to send resources preferentially/speed up the scheduling of the first data packet on the unicast path.
  • the access network device after the access network device achieves the transmission synchronization in the second case on the multicast path and the unicast path, the access network device performs the buffering before the transmission synchronization on the multicast path and the unicast path. For data packets, adjust the sending speed of data packets corresponding to the unicast path and the multicast path according to the size of the sequence number of the data packet or the number of buffers.
  • UPF sets the absolute sequence numbers and relative offset values of the data packets sent on the two paths, and the access network equipment can resolve the two according to the absolute sequence numbers and relative offset values of the data packets on the unicast and multicast paths.
  • the first terminal device is added to the first terminal device group, and the multicast path is used to receive the data packet of the first service to ensure The first terminal device can smoothly merge from the unicast path to the multicast path of the access network.
  • the methods and operations implemented by the access network equipment can also be implemented by components (such as chips or circuits) that can be used for the access network equipment, and the methods implemented by user plane network elements
  • the sum operation can also be implemented by components (such as chips or circuits) that can be used for user plane network elements.
  • the embodiments of the present application can divide the transmitting end device or the receiving end device into functional modules according to the foregoing method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. middle.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The following is an example of dividing each function module corresponding to each function.
  • FIG. 9 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiving unit 910 and a processing unit 920.
  • the transceiving unit 910 can communicate with the outside, and the processing unit 920 is used for data processing.
  • the transceiving unit 910 may also be referred to as a communication interface or a communication unit.
  • the communication device 900 may further include a storage unit, and the storage unit may be used to store instructions and/or data, and the processing unit 920 may read the instructions and/or data in the storage unit.
  • the communication device 900 may be an access network device
  • the transceiving unit 910 is used to perform the receiving or sending operation of the access network device in the above method embodiment
  • the processing unit 920 is used to perform the above method implementation.
  • the internal processing operation of the access network equipment In the example, the internal processing operation of the access network equipment.
  • the communication device 900 may be an access network device.
  • the transceiver unit 910 and the processing unit 920 may perform the following operations.
  • the transceiver unit 910 is configured to: receive synchronization indication information from the user plane network element UPF, and the synchronization indication information is used to indicate that the service data packet of the first service is on the multicast path and the first terminal device
  • the unicast path achieves transmission synchronization, the unicast path uses unicast to transmit the service data packet of the first service to the first terminal device, and the multicast path uses the multicast method to transmit the service data of the first service to the first terminal device group Package, the first terminal device group includes at least one terminal device;
  • the processing unit 920 is configured to: according to the synchronization instruction information, control the transceiver unit to send first instruction information to the first terminal device, and the first instruction information is used to instruct the first terminal device to pass
  • the multicast path receives the service data packet of the first service.
  • the transceiver unit 910 is specifically configured to receive synchronization indication information from the UPF through a unicast path and/or a multicast path.
  • the transceiver unit 910 is further configured to send unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the service data packet of the first service on the unicast path.
  • the synchronization indication information is a null service data packet, a synchronization data packet, or an end flag packet.
  • the transceiver unit 910 is configured to: receive the first data packet of the first service from the user plane network element UPF through the unicast path of the first terminal device, and the unicast path The service data packet of the first service is transmitted to the first terminal device in a unicast mode; the transceiver unit 910 is further configured to: receive the second data packet of the first service from the UPF through a multicast path, and the multicast path uses a multicast mode to send the second data packet of the first service to the first terminal device.
  • a terminal device group transmits service data packets of the first service, and the terminal device group includes at least one terminal device; the processing unit 920 is configured to: according to the first data packet and the second data packet, determine that the service data packet of the first service is in the multicast The path and the unicast path achieve transmission synchronization; the transceiver unit 910 is further configured to: send first indication information to the first terminal device, where the first indication information is used to instruct the first terminal device to receive the service data of the first service through the multicast path .
  • the first data packet includes the sequence number of the first data packet and the first service data packet
  • the second data packet includes the sequence number of the second data packet and the second service data packet
  • the first service data packet and the second service data The packet belongs to the service data packet of the first service.
  • sequence number of the first data packet is the sequence number of the first service data packet
  • sequence number of the second data packet is the sequence number of the second service data packet
  • the sequence number of the first data packet includes the absolute sequence number and the first relative offset value of the first data packet
  • the sequence number of the second data packet includes the absolute sequence number and the second relative offset value of the second data packet
  • the first The absolute sequence number of the data packet is the transmission sequence number of the first data packet on the unicast path
  • the first relative offset value is the difference between the absolute sequence number of the first data packet and the sequence number of the first service data packet
  • the absolute sequence number of the packet is the sending sequence number of the second data packet on the multicast path
  • the second relative offset value is the difference between the absolute sequence number of the second data packet and the sequence number of the second service data packet
  • the first data packet The sequence number of is the sum of the absolute sequence number of the first data packet and the first relative offset value
  • the sequence number of the second data packet is the sum of the absolute sequence number of the second data packet and the second relative offset value.
  • the sequence number of the service data packet is the receiving sequence number of the service data packet for the first service on the UPF.
  • the first data packet is the first data packet to be sent by the transceiver unit 910 on the unicast path
  • the second data packet is the first data packet to be sent by the transceiver unit 910 on the multicast path
  • the processing unit 920 is specifically used to: when the first service data packet is the same as the second service data packet, determine that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path; or, when the sequence number of the first data packet When the sequence number of the second data packet is the same, it is determined that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • the first data packet is the last data packet successfully received by the transceiver unit 910 on the unicast path
  • the second data packet is the last data packet successfully received by the access network device on the multicast path
  • the processing unit 920 It is specifically used for: when the first service data packet is the same as the second service data packet, it is determined that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path; or, when the sequence number of the first data packet is the same as When the sequence numbers of the second data packets are the same, it is determined that the service data packets of the first service achieve transmission synchronization on the multicast path and the unicast path.
  • the transceiver unit 910 is further configured to send unicast stop instruction information to the UPF, and the unicast stop instruction information is used to instruct the UPF to stop sending the service data packet of the first service on the unicast path.
  • the processing unit 920 is further configured to: according to the sequence number of the data packet of the first service on the unicast path and the multicast path Or the number of buffers to adjust the sending rate of the data packet of the first service.
  • the communication device 900 may be a component configured in an access network device, for example, a chip in the access network device.
  • the transceiver unit 910 may be an interface circuit, a pin, and the like.
  • the interface circuit may include an input circuit and an output circuit
  • the processing unit 920 may include a processing circuit.
  • the transceiver unit 910 may also be a radio frequency module.
  • the processing unit 920 may be a baseband module.
  • the radio frequency module is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals; the baseband module is mainly used for baseband processing and control of base stations.
  • FIG. 10 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1000 includes a transceiver unit 1010 and a processing unit 1020.
  • the transceiver unit 1010 can communicate with the outside, and the processing unit 1020 is used for data processing.
  • the transceiver unit 1010 may also be referred to as a communication interface or a communication unit.
  • the communication device 1000 may further include a storage unit, and the storage unit may be used to store instructions and/or data, and the processing unit 1020 may read the instructions and/or data in the storage unit.
  • the communication device 1000 may be a user plane network element
  • the transceiving unit 1010 is used to perform the receiving or sending operation of the user plane network element in the above method embodiment
  • the processing unit 1020 is used to perform the above method implementation In the example, the internal processing operation of the user plane network element.
  • the communication device 1000 may be a user plane network element.
  • the transceiver unit 1010 and the processing unit 1020 may perform the following operations.
  • the processing unit 1020 is used to determine that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path of the first terminal device, and the unicast path uses The unicast mode transmits the service data packet of the first service to the first terminal device, and the multicast path uses the multicast mode to transmit the service data packet of the first service to the first terminal device group, and the first terminal device group includes at least one terminal device;
  • the transceiver unit 1010 is configured to send synchronization indication information to the access network device of the first terminal device, where the synchronization indication information is used to indicate that the service data packet of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • the processing unit 1020 is specifically configured to: when the transceiver unit is to send the first service data packet of the first service on the unicast path, and the transceiver unit is to send the first service data packet of the first service to be sent on the multicast path.
  • the processing unit determines that the service data of the first service has reached transmission synchronization on the multicast path and the unicast path; or the first service data packet of the first service to be sent by the transceiver unit on the unicast path
  • the processing unit determines that the service data of the first service achieves transmission synchronization on the multicast path and the unicast path.
  • the transceiver unit 1010 is specifically configured to send synchronization indication information on the unicast path and the multicast path.
  • the transceiving unit 1010 is further configured to: when the processing unit determines that the service data packet of the first service reaches transmission synchronization on the multicast path and the unicast path, the transceiver unit stops sending the service of the first service on the unicast path. data pack.
  • the transceiving unit 1010 is further configured to: receive the unicast stop instruction information from the access network device; the processing unit 1020 is further configured to: according to the unicast stop instruction information, control the transceiving unit 1010 to stop sending the first unicast path on the unicast path.
  • Business data package for business is further configured to: according to the unicast stop instruction information, control the transceiving unit 1010 to stop sending the first unicast path on the unicast path.
  • the synchronization indication information includes an empty service data packet, a synchronization data packet, or an end flag packet.
  • the transceiving unit 1010 is configured to: receive service data packets of the first service; the transceiving unit 1010 is further configured to: transmit to the first terminal device through the unicast path of the first terminal device.
  • the access network device of the terminal device sends the first data packet of the first service, the first data packet carries the sequence number of the first data packet and the first service data packet; the transceiver unit 1010 is also used to: send the first data packet to the access network through the multicast path
  • the device sends a second data packet of the first service, the second data packet carrying the sequence number of the second data packet and the second service data packet, and the first service data packet and the second service data packet belong to the service data packet of the first service;
  • the unicast path uses the unicast mode to transmit the service data packet of the first service to the first terminal device
  • the multicast path uses the multicast mode to transmit the service data packet of the first service to a group of terminal devices.
  • sequence number of the first data packet is the sequence number of the first service data packet
  • sequence number of the second data packet is the sequence number of the second service data packet
  • the sequence number of the first data packet includes the absolute sequence number and the first relative offset value of the first data packet
  • the sequence number of the second data packet includes the absolute sequence number and the second relative offset value of the second data packet
  • the absolute sequence number of the first data packet is the sending sequence number of the first data packet on the unicast path
  • the first relative offset value is the difference between the absolute sequence number of the first data packet and the sequence number of the first service data packet
  • the absolute sequence number of the second data packet is the sending sequence number of the second data packet on the multicast path
  • the second relative offset value is the difference between the absolute sequence number of the second data packet and the sequence number of the second service data packet.
  • the sequence number of the service data packet is the receiving sequence number of the service data packet for the first service on the transceiver unit 1010.
  • the transceiver unit 1010 is configured to: receive unicast stop instruction information from the access network device; the processing unit 1020 is configured to: according to the unicast stop instruction information, control the transceiver unit 1010 to stop sending the first service on the unicast path Business data package.
  • the first data packet is the first data packet to be sent by the transceiver unit 1010 on the unicast path
  • the second data packet is the first data packet to be sent by the transceiver unit 1010 on the multicast path
  • the processing unit 1020 is configured to: when it is determined that the sequence number of the first data packet is the same as the sequence number of the second data packet, control the transceiver unit 1010 to stop sending the service data packet of the first service on the unicast path.
  • the communication device 900 may be a component configured in a user plane network element, for example, a chip in a user plane network element.
  • the transceiver unit 1010 may be an interface circuit, a pin, and the like.
  • the interface circuit may include an input circuit and an output circuit
  • the processing unit 1020 may include a processing circuit.
  • the transceiver unit 1010 may also be a radio frequency module.
  • the processing unit 1020 may be a baseband module.
  • the radio frequency module is mainly used for transmitting and receiving radio frequency signals and the conversion between radio frequency signals and baseband signals; the baseband module is mainly used for baseband processing and controlling the base station.
  • an embodiment of the present application also provides a communication device 1100.
  • the communication device 1000 includes a processor 1110, the processor 1110 is coupled with a memory 1020, the memory 1020 is used to store computer programs or instructions or and/or data, and the processor 1110 is used to execute the computer programs or instructions and/or data stored in the memory 1120 , So that the method in the above method embodiment is executed.
  • the communication device 1100 includes one or more processors 1110.
  • the communication device 1100 may further include a memory 1120.
  • the communication device 1100 includes one or more memories 1120.
  • the memory 1120 may be integrated with the processor 1110 or provided separately.
  • the communication device 1100 may further include a transceiver 1130, and the transceiver 1130 is used for receiving and/or sending signals.
  • the processor 1110 is configured to control the transceiver 1130 to receive and/or send signals.
  • the communication device 1100 is used to implement the operations performed by the access network device in the foregoing method embodiments.
  • the processor 1110 is used to implement the operations performed by the access network device in the foregoing method embodiment
  • the transceiver 1130 is used to implement the receiving or sending operations performed by the access network device in the foregoing method embodiment.
  • the processing unit 920 in the device 900 may be the processor in FIG. 11, and the transceiving unit 910 may be the transceiver in FIG. 11.
  • the processor 1110 refer to the description of the processing unit 920 above, and refer to the description of the transceiving unit 910 for the operations performed by the transceiver 1130, which will not be repeated here.
  • an embodiment of the present application also provides a communication device 1200.
  • the communication device 1000 includes a processor 1210, the processor 1210 is coupled with a memory 1020, the memory 1020 is used to store computer programs or instructions or and/or data, and the processor 1210 is used to execute the computer programs or instructions and/or data stored in the memory 1220 , So that the method in the above method embodiment is executed.
  • the communication device 1200 includes one or more processors 1210.
  • the communication device 1200 may further include a memory 1220.
  • the memory 1220 included in the communication device 1200 may be one or more.
  • the memory 1220 may be integrated with the processor 1210 or provided separately.
  • the communication device 1200 may further include a transceiver 1230, and the transceiver 1230 is used for receiving and/or sending signals.
  • the processor 1210 is configured to control the transceiver 1230 to receive and/or send signals.
  • the communication device 1200 is used to implement the operations performed by the user plane network element in the above method embodiment.
  • the processor 1210 is used to implement the operations performed by the user plane network element in the above method embodiment
  • the transceiver 1230 is used to implement the receiving or sending operations performed by the user plane network element in the above method embodiment.
  • the processing unit 1020 in the device 1000 may be the processor in FIG. 12, and the transceiving unit 1010 may be the transceiver in FIG. 12.
  • the processor 1210 refer to the description of the processing unit 1020 above, and for the operations performed by the transceiver 1230, refer to the description of the transceiver unit 1010, which will not be repeated here.
  • An embodiment of the present application also provides a computer-readable storage medium on which is stored computer instructions for implementing the method executed by the access network device in the foregoing method embodiment or the method executed by the user plane network element.
  • the computer when the computer program is executed by a computer, the computer can implement the method executed by the access network device in the foregoing method embodiment or the method executed by the user plane network element.
  • the embodiments of the present application also provide a computer program product containing instructions, which when executed by a computer, cause the computer to implement the method executed by the access network device in the foregoing method embodiments or the method executed by the user plane network element.
  • An embodiment of the present application also provides a communication system, which includes the user plane network element and the access network device in the above embodiment.
  • the communication system includes: the user plane network element and the access network device in the embodiments described above with reference to FIG. 4, FIG. 6 and FIG. 8.
  • the access network device or user plane network element may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system at the operating system layer can be any one or more computer operating systems that implement business processing through processes, such as Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer can include applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of this application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of this application, as long as it can run a program that records the code of the method provided in the embodiment of this application, according to the method provided in the embodiment of this application.
  • the execution subject of the method provided in the embodiments of the present application may be an access network device or a user plane network element, or a functional module in the access network device or user plane network element that can call and execute the program.
  • the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • processors mentioned in the embodiments of this application may be a central processing unit (central processing unit, CPU), or other general-purpose processors, digital signal processors (digital signal processors, DSP), and application-specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • CPU central processing unit
  • DSP digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM).
  • RAM can be used as an external cache.
  • RAM may include the following various forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM) , Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and Direct RAM Bus RAM (DR RAM).
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM synchronous DRAM
  • Double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced SDRAM enhanced synchronous dynamic random access memory
  • SLDRAM Direct RAM Bus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • 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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer may be a personal computer, a server, or a network device.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid state disk (SSD)), etc.
  • the foregoing usable medium may include but not Limited to: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication et un dispositif de communication. Le procédé de communication et le dispositif de communication peuvent permettre à une station de base de déterminer qu'un paquet de données envoyé sur un trajet d'unidiffusion est synchronisé avec un paquet de données envoyé sur un trajet de multidiffusion de sorte qu'un dispositif terminal peut passer sans à-coups du trajet d'unidiffusion au trajet de multidiffusion. Le procédé comprend : la réception, par un dispositif de réseau d'accès, d'informations d'indication de synchronisation depuis un élément de réseau de plan d'utilisateur, UPF, les informations d'indication de synchronisation étant utilisées pour indiquer que des paquets de données de service d'un premier service sont transmis de manière synchrone sur un trajet de multidiffusion et sur un trajet d'unidiffusion d'un premier dispositif terminal ; la transmission, par le trajet d'unidiffusion, d'un paquet de données de service du premier service au premier dispositif terminal par unidiffusion, et la transmission, par le trajet de multidiffusion, d'un paquet de données de service du premier service à un premier groupe de dispositifs terminaux par multidiffusion, le premier groupe de dispositifs terminaux comprenant au moins un dispositif terminal ; et l'envoi, par le dispositif de réseau d'accès, de premières informations d'indication au premier dispositif terminal selon les informations d'indication de synchronisation, les premières informations d'indication étant utilisées pour ordonner au premier dispositif terminal de recevoir le paquet de données de service du premier service via le trajet de multidiffusion.
PCT/CN2020/072720 2020-01-17 2020-01-17 Procédé de communication et dispositif de communication WO2021142767A1 (fr)

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