WO2022067795A1

WO2022067795A1 - Communication method and apparatus

Info

Publication number: WO2022067795A1
Application number: PCT/CN2020/119719
Authority: WO
Inventors: 陈磊; 李胜钰; 官磊; 李秉肇
Original assignee: 华为技术有限公司
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-07
Also published as: CN116114207A

Abstract

Disclosed are a communication method and apparatus. When a first terminal device and a second terminal device communicate with each other, a network device performs exclusive-or processing on first data sent by the first terminal device and second data sent by the second terminal device to form third data, and sends a third data packet comprising the third data to the first terminal device and/or the second terminal device. According to first indication information, the first terminal device processes and obtains the second data according to the third data and the first data, and/or according to second indication information, the second terminal device processes and obtains the first data according to the third data and the second data. Thus, the air interface consumption during downlink transmission can be reduced.

Description

A communication method and device

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a communication method and device.

Background technique

At present, in a cellular-based communication system, when the two ends of the communication send data to each other, the data is first sent by the data sender (such as a terminal device) to the base station, and then the base station sends it to the core network, and the core network sends the data to the receiver. The serving base station of the terminal, the serving base station then sends the data to the data receiving terminal (such as another terminal device).

Based on the above data transmission methods, in an industrial scenario, the communication between the industrial equipment and the controller must be forwarded through the base station and the core network to complete. In industrial scenarios, communication services have high requirements on reliability and delay. According to the above data transmission method, a large amount of resources will be expended on the air interface to ensure high service performance. Therefore, how to reduce the consumption of air interface resources on the premise of ensuring service performance is an urgent problem to be solved.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a communication method and apparatus, which are used to reduce air interface resource consumption in downlink service transmission.

In a first aspect, a communication method is provided. The method may be performed by a first communication apparatus, and the first communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. Exemplarily, the first communication device is a first network device (such as a core network device, a server, etc.), or a chip configured in the first network device for implementing the functions of the network device, or a chip for implementing a network device. other parts of the function of the device. In the following introduction process, the first communication device is the first network device as an example for description.

The method includes: the first network device can receive a first data packet from the first terminal device, where the first data packet includes first indication information and first data. And, receiving a second data packet from the second terminal device, where the second data packet includes second indication information and second data. The first network device may send a third data packet to the first terminal device and the second terminal device, where the third data packet includes the first indication information, the second indication information and third data, the third data, There is an exclusive OR relationship between the second data and the first data.

Using the above method, when the first terminal device and the second terminal device communicate with each other, the network device performs XOR processing on the first data sent by the first terminal device and the second data sent by the second terminal device to form third data, and send a third data packet including the third data to the first terminal device and/or the second terminal device. The first terminal device processes the third data and the first data to obtain the second data according to the first indication information, and/or the second terminal device processes the third data and the second data to obtain the first data according to the second indication information. data, which can reduce air interface consumption during downlink transmission.

In a possible example, the first data packet further includes: third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes, or in other words, indicating that the first terminal device and the Service interaction is performed between the second terminal devices; and/or fourth indication information, where the fourth indication information is used to indicate that the first data has not undergone XOR processing. Similarly, the second data packet may include third indication information and or fourth indication information. The third indication information in the second data packet may indicate that the first terminal device and the second terminal device are mutual target nodes. The fourth indication information in the second data packet may be used to indicate that the second data has not undergone XOR processing.

In a possible example, the third data packet further includes: third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or fifth indication information, the The fifth indication information is used to indicate that the third data has undergone XOR processing, or the fifth indication information is used to indicate the XOR relationship.

In a possible example, the third indication information includes an address pair consisting of the address of the first terminal device and the address of the second terminal device.

In a possible example, the first indication information is carried in a specific protocol layer, where the specific protocol layer includes an application layer or an XOR layer, and the XOR layer is located between the PDCP layer and the APP layer.

In a possible example, the first network device may receive first information from the first terminal device, where the first information includes at least one of the following information:

the cell identifier of the first terminal device;

The target address of the service to which the first data belongs; or,

The source address of the service to which the first data belongs.

In a possible example, the first network device may send second information to the first terminal device; the second information includes at least one of the following information: third indication information, where the third indication information is used to indicate the The first terminal device and the second terminal device are mutual target nodes; or, information used to indicate that the second data is obtained according to the third data and the first data; or, a multicast service identifier, the multicast service The identifier is used for the reception of the second data packet; or, the target address of the multicast service, and the target address of the multicast service is the target address of the third data packet; or, used to indicate the first terminal device and the third data packet The information of the sequence between the two terminal devices, the sequence is used to determine the position of the first indication information in the third data packet; or, the PDU session ID of the third data packet; or, the third data packet The ID of the QoS flow of the packet; or, the ID of the DRB of the third data packet.

In a possible example, the first network device may send the second data packet to the first terminal device and the second terminal device in a multicast manner.

In a possible example, the first network device includes a UPF, and the first network device may send third information to the second network device, where the third information is used to request the cell identity of the first terminal device and the second cell identification of the terminal equipment; receiving the cell identification of the first terminal equipment and the cell identification of the second terminal equipment from the second network equipment; determining that the cell identification of the first terminal equipment is the same as the cell identification of the second terminal equipment .

In a possible example, the first network device includes a UPF, and the first network device may further send fourth information to the second network device, where the fourth information is used to indicate the first terminal device and the second terminal device target nodes for each other; receiving fifth information from the second network device, where the fifth information is used to instruct the first network device to determine that the cell identifier of the first terminal device is the same as the cell identifier of the second terminal device, Or, the fifth information is used to determine to send the second data packet to the first terminal device and the second terminal device by multicast.

In a possible example, the fourth information includes identification information of the first terminal device and identification information of the second terminal device.

In a possible example, the fifth information includes at least one of the following information: the identifier of the first terminal device; or, the identifier of the second terminal device; or, the PDU session information of the first terminal device; Or, the information of the PDU session of the second terminal device.

In a possible example, the first network device includes a UPF, and the first network device may further send fourth information to the second network device, where the fourth information is used to indicate the first terminal device and the second terminal device target nodes for each other.

In a possible example, the first network device includes a server or a UPF. When the first network device includes a UPF, the second network device includes an AMF.

In a second aspect, a communication method is provided. The method may be performed by a second communication device, which may be a communication device or a communication device, such as a chip, capable of supporting the functions required by the communication device to implement the method. Exemplarily, the second communication device is a first terminal device (or a second terminal device), or a chip provided in the first terminal device (or a second terminal device) for implementing the function of the network device, or For other components used to realize the function of the network device. In the following introduction process, the second communication apparatus is the first terminal device as an example for description.

The method includes: a first terminal device sends a first data packet, the first data packet includes first indication information and first data, and receives a third data packet from a first network device, the third data packet includes the first indication information and third data, and obtain second data according to the first indication information, wherein the third data, the second data and the first data have an exclusive OR relationship.

In a possible example, the first data packet further includes: third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or, fourth indication information, the The fourth indication information is used to indicate that the first data has not undergone XOR processing.

In a possible example, the third data packet further includes: third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or fifth indication information, the The fifth indication information is used to indicate that the third data has undergone XOR processing.

In a possible example, a specific protocol layer of the first terminal device stores the first indication information and the first data. The specific protocol layer of the first terminal device obtains the second data according to the third data and the first data. and / or,

The specific protocol layer of the first terminal device determines that the third data packet includes the first indication information; the specific protocol layer of the first terminal device obtains the second data according to the third data and the first data.

In a possible example, the specific protocol layer includes an application layer or an XOR layer, where the XOR layer is located between the PDCP layer and the APP layer.

In a possible example, the first terminal device may also send first information to the first network device, where the first information includes at least one of the following information: a cell identifier of the first terminal device; or, the first information The destination address of the service to which the data belongs; or, the source address of the service to which the first data belongs.

In a possible example, the first terminal device may also receive second information from the first network device or a second network device (eg, AMF), and the second network device is connected to the first network device; the The second information includes at least one of the following information: third indication information, where the third indication information is used to indicate that the first terminal device and the second terminal device are mutual target nodes; or, used to indicate that according to the third data and the first data to obtain the information of the second data; or, the multicast service identifier, the multicast service identifier is used for receiving the second data packet; or, the target address of the multicast service, the The destination address is the destination address of the second data packet; or, information used to indicate the sequence (or primary and secondary sequence) between the first terminal device and the second terminal device, and the sequence is used to determine the first terminal device. The position of the indication information in the second data packet; or, the PDU session ID of the third data packet; or, the ID of the QoS flow of the third data packet; or, the ID of the DRB of the third data packet.

For the beneficial effects of the method shown in the second aspect and its possible designs above, reference may be made to the beneficial effects in the first aspect and its possible designs.

In a third aspect, a communication device is provided, for example, the communication device is the first communication device shown above. The first communication apparatus is configured to execute the method in the above-mentioned first aspect or any possible implementation manner thereof. Specifically, the first communication apparatus may include a module for performing the method in the first aspect or any possible implementation manner thereof, for example, including a processing module and a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the first communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a first network device. In the following, it is taken as an example that the first communication apparatus is the first network device. For example, the transceiver module can be implemented by a transceiver, and the processing module can be implemented by a processor. Alternatively, the sending module may be implemented by a transmitter, the receiving module may be implemented by a receiver, and the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions. If the first communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device. Alternatively, if the first communication device is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components. In the introduction process of the third aspect, the first communication device is taken as the first network device, and the processing module and the transceiver module are taken as examples for introduction.

Wherein, when the method shown in the first aspect is performed, the transceiver module may receive a first data packet from the first terminal device by the first network device, where the first data packet includes the first indication information and the first data, and , receiving a second data packet from the second terminal device, where the second data packet includes second indication information and second data. The transceiver module can also send a third data packet to the first terminal device and the second terminal device, the third data packet includes the first indication information, the second indication information and third data, the third data, the There is an exclusive OR relationship between the second data and the first data. The processing module may be configured to obtain third data according to the first data and the second data, for example, perform XOR processing on the first data and the second data to obtain the third data.

In a possible example, the first data packet further includes: third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or, fourth indication information, the The fourth indication information is used to indicate that the first data has not undergone XOR processing. Similarly, the second data packet may include third indication information and or fourth indication information. The third indication information in the second data packet may indicate that the first terminal device and the second terminal device are mutual target nodes. The fourth indication information in the second data packet may be used to indicate that the second data has not undergone XOR processing.

In a possible example, the transceiver module may receive first information from the first terminal device, where the first information includes at least one of the following information:

the cell identifier of the first terminal device;

The target address of the service to which the first data belongs; or,

The source address of the service to which the first data belongs.

In a possible example, the transceiver module may send second information to the first terminal device; the second information includes at least one of the following information: third indication information, where the third indication information is used to indicate the first terminal device The terminal device and the second terminal device are each other's target nodes; or, the information used to indicate that the second data is obtained according to the third data and the first data; or, the multicast service identifier, the multicast service identifier is used for upon receipt of the second data packet; or, the target address of the multicast service, which is the target address of the third data packet; or, used to indicate the first terminal device and the second terminal The information of the sequence between devices, the sequence is used to determine the position of the first indication information in the third data packet; or, the PDU session ID of the third data packet; or, the third data packet's PDU session ID The ID of the QoS flow; or, the ID of the DRB of the third data packet.

In a possible example, the transceiver module may send the second data packet to the first terminal device and the second terminal device in a multicast manner.

In a possible example, the first network device includes a UPF, and the transceiver module may send third information to the second network device, where the third information is used to request the cell identity of the first terminal device and the second terminal device receiving the cell identity of the first terminal equipment and the cell identity of the second terminal equipment from the second network equipment; the processing module can determine the cell identity of the first terminal equipment and the cell identity of the second terminal equipment same.

In a possible example, the first network device includes a UPF, and the transceiver module may further send fourth information to the second network device, where the fourth information is used to indicate that the first terminal device and the second terminal device are mutual target node; receiving fifth information from the second network device, where the fifth information is used to instruct the first network device to determine that the cell identifier of the first terminal device is the same as the cell identifier of the second terminal device, or, The fifth information is used to determine to send the second data packet to the first terminal device and the second terminal device by multicast.

For the beneficial effects of the method shown in the third aspect and its possible designs above, reference may be made to the beneficial effects in the first aspect and its possible designs.

In a fourth aspect, a communication device is provided, for example, the communication device is the second communication device shown above. The second communication apparatus is configured to perform the method in the second aspect or any possible implementation manner thereof. Specifically, the second communication apparatus may include a module for executing the method in the second aspect or any possible implementation manner thereof, for example, including a processing module and a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the second communication apparatus is a communication device, or a chip or other components provided in the communication device. Exemplarily, the communication device is a first terminal device (or a second terminal device). In the following, it is taken as an example that the second communication apparatus is a first terminal device, for example, the first terminal device is a UE. For example, the transceiver module can also be implemented by a transceiver, and the processing module can also be implemented by a processor. Alternatively, the sending module may be implemented by a transmitter, the receiving module may be implemented by a receiver, and the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions. If the second communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device. Or, if the second communication device is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components. In the introduction process of the fourth aspect, the second communication device is the first terminal device, and the processing module and the transceiver module are taken as examples for introduction.

Wherein, when performing the method shown in the above second aspect, the transceiver module may send a first data packet, where the first data packet includes first indication information and first data, and receive a third data packet from the first network device, the The third data packet includes the first indication information and the third data, and the processing module can obtain the second data according to the first indication information, wherein the third data, the second data and the first data are different from each other. or relationship.

In a possible example, the processing module stores the first indication information and the first data in the specific protocol layer of the first terminal device; the processing module stores the first indication information and the first data in the specific protocol layer of the first terminal device according to the first The indication information and the first data are obtained, and the second data is obtained. and / or,

The processing module determines that the third data packet includes the first indication information according to the first indication information stored in the specific protocol layer of the first terminal device; the processing module determines according to the first indication information stored in the specific protocol layer of the first terminal device. data and the third data and the first data to obtain the second data.

In a possible example, the transceiver module may also send first information to the first network device, where the first information includes at least one of the following information: a cell identifier of the first terminal device; or, the first data The destination address of the service to which the first data belongs; or, the source address of the service to which the first data belongs.

In a possible example, the transceiver module may also receive second information from the first network device or a second network device (eg, AMF), where the second network device is connected to the first network device; the second network device is connected to the first network device. The information includes at least one of the following information: third indication information, which is used to indicate that the first terminal device and the second terminal device are mutual target nodes; or, is used to indicate that according to the third data and The first data obtains the information of the second data; or, the multicast service identifier, the multicast service identifier is used for receiving the second data packet; or, the destination address of the multicast service, the destination address of the multicast service is the destination address of the second data packet; or, information used to indicate the sequence (or primary and secondary sequence) between the first terminal device and the second terminal device, and the sequence is used to determine the first indication The position of the information in the second data packet; or, the PDU session ID of the third data packet; or, the ID of the QoS flow of the third data packet; or, the ID of the DRB of the third data packet.

For the beneficial effects of the method shown in the fourth aspect and its possible designs above, reference may be made to the beneficial effects in the first aspect and its possible designs.

In a fifth aspect, a communication system is provided, the communication system including the communication device shown in the third aspect and the communication device shown in the fourth aspect.

In a sixth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store computer instructions, and when the computer instructions are executed on a computer, the computer is made to perform the above-mentioned first aspect or the second aspect or any of them. The method shown in one possible implementation.

A seventh aspect provides a computer program product comprising instructions, the computer program product including computer instructions, when the computer instructions are run on a computer, the computer is made to perform the above-mentioned first aspect or the second aspect or any one possibility thereof The method shown in the embodiment of .

In an eighth aspect, a circuit is provided, the circuit being coupled to a memory, the circuit being used to perform the method shown in the first aspect or the second aspect or any one of the possible implementations thereof. The circuitry may include chip circuitry.

Description of drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

2 is a schematic diagram of a communication protocol stack architecture;

3 is a schematic diagram of another communication protocol stack architecture;

FIG. 4 is a schematic diagram of the architecture of another communication system provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application;

6 is a schematic structural diagram of a data packet provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another data packet provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another data packet provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application;

10 is a schematic flowchart of another communication method provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another data packet provided by an embodiment of the application;

FIG. 12 is a schematic structural diagram of another data packet provided by an embodiment of the application;

13 is a schematic flowchart of another communication method provided by an embodiment of the present application;

14 is a schematic diagram of a communication protocol stack architecture provided by an embodiment of the present application;

15 is a schematic diagram of another communication protocol stack architecture provided by an embodiment of the present application;

FIG. 16 is a schematic flowchart of another communication method provided by an embodiment of the present application;

17 is a schematic diagram of another communication protocol stack architecture provided by an embodiment of the present application;

FIG. 18 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 20 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 21 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The specific operation methods in the method embodiments may also be applied to the apparatus embodiments or the system embodiments.

As shown in FIG. 1 , the communication method provided by the embodiment of the present application may be applied to a wireless communication system, and the wireless communication system may include a terminal device 101 and a network device 102 .

It should be understood that the above wireless communication system is applicable to both low frequency scenarios (sub 6G) and high frequency scenarios (above 6G). Application scenarios of the wireless communication system include, but are not limited to, fifth-generation systems, new radio (NR) communication systems, or future evolved public land mobile network (PLMN) systems, and the like.

The terminal device 101 shown above may be a user equipment (UE), a terminal (terminal), an access terminal, a terminal unit, a terminal station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile terminal ( mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc. The terminal device 101 may have a wireless transceiver function, which can communicate with one or more network devices of one or more communication systems (eg, wireless communication), and accept network services provided by the network devices, where the network devices include but not The network device 102 is limited to the illustration.

The terminal device 101 may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMN networks, etc.

In addition, the terminal device 101 can be deployed on land, including indoor or outdoor, handheld or vehicle; the terminal device 101 can also be deployed on water (such as ships, etc.); the terminal device 101 can also be deployed in the air (such as aircraft, balloons and satellites) superior). The terminal device 101 may specifically be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial control (industrial control) wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal device 101 may also be a communication chip with a communication module, a vehicle with a communication function, or an in-vehicle device (such as an in-vehicle communication device, an in-vehicle communication chip) or the like.

The network device 102 may be an access network device (or an access network point). The access network device refers to a device that provides a network access function, such as a radio access network (radio access network, RAN) base station (or RAN device) and the like. The network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, and the like. The network device 102 may also include a relay station (relay device), an access point, a base station in a future 5G network, a base station in a future evolved PLMN network, or an NR base station, and the like. The network device 102 may be a wearable device or a vehicle-mounted device. The network device 102 may also be a communication chip with a communication module.

For example, the network device 102 includes, but is not limited to: the next generation base station (g nodeB, gNB) in 5G, the evolved node B (evolved node B, eNB) in the long term evolution (long term evolution, LTE) system, radio network control radio network controller (RNC), wireless controller under cloud radio access network (CRAN) system, base station controller (BSC), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, global aystem for mobile communication , GSM) or code division multiple access (code division multiple access, CDMA) network base transceiver station (base transceiver station, BTS), can also be wideband code division multiple access (wideband code division multiple access, WCDMA) in A node base station (NB) can also be an evolutional NB (eNB or eNodeB) in LTE, and can also be a base station device in a future 5G network or an access network device in a future evolved PLMN network, It can also be a wearable device or a vehicle-mounted device.

In some deployments, network devices may include centralized units (CUs) and distributed units (DUs). The network equipment may also include an active antenna unit (AAU). CU implements some functions of network equipment, and DU implements some functions of network equipment. For example, CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer function. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, in this architecture, the higher-layer signaling, such as the RRC layer signaling, can also be considered to be sent by the DU. , or, sent by DU+AAU. It can be understood that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network devices in the access network (radio access network, RAN), and the CU can also be divided into network devices (may be referred to as CN devices) in the core network (core network, CN). This is not limited.

In addition, the network device 102 may be connected to a core network (core network, CN) device, and the core network device may be used to provide core network services for the terminal device 101 accessing the network device 102 . Core network devices can correspond to different devices under different systems. For example, in 3G, the core network equipment can correspond to the service support node (serving GPRS support node, SGSN) of general packet radio service technology (general packet radio service, GPRS) and/or the gateway support node of GPRS (gateway GPRS Support Node, GGSN) . In 4G, the core network device may correspond to a mobility management entity (mobility management entity, MME) and/or a serving gateway (serving gateway, S-GW). In 5G, core network equipment can correspond to access and mobility management function (AMF) entities, session management function (SMF) entities, or user plane function (UPF) entities, etc. .

The network device and the terminal device as shown in FIG. 1 may respectively have a certain protocol stack structure for mutual communication. FIG. 2 is a schematic diagram of a protocol stack structure of a network device and a terminal device. In FIG. 2 , the dotted line indicates that data is sent from the network device to the terminal device. It can be understood that this is only schematic, and the direction of data transmission may also be from the terminal device to the network device. As shown in Figure 2, for example, the control plane protocol stack structure may include a radio resource control (RRC) layer, a service data adaptation protocol (SDAP) layer, and a packet data convergence layer protocol (packet data convergence protocol). , PDCP) layer, radio link control (radio link control, RLC) layer, media access control (media Access Link control, MAC) and physical layer and so on. The physical layer is located at the lowest layer (layer 1), the MAC layer, RLC layer, PDCP layer and SDAP layer belong to the second layer (layer 2), and the RRC layer belongs to the third layer (layer 3).

The data first arrives at the PDCP layer of the network device, and then is transmitted to the RLC layer and the MAC layer after being processed by the PDCP layer of the network device. After being processed, it is sent from the physical layer and transmitted to the terminal device through the air interface. Then, each protocol layer on the terminal device side sequentially performs corresponding processing on the data packets according to the processing sequence opposite to that of the network device. On the network equipment and terminal equipment side, the processing of data packets by various layers can be visually combined, which is called wireless bearer. For each data in the wireless bearer, it needs to be processed by each layer, and each layer has corresponding functions. entity to perform the corresponding function, such as the PDCP entity of the PDCP layer.

Each radio bearer configuration will contain a PDCP entity, and at the same time, the radio bearer configuration will be associated with at least one RLC entity, and each RLC entity corresponds to a logical channel. On top of PDCP, there may also be an SDAP layer. The SDAP layer is responsible for mapping data from the core network to different bearers.

Specific data examples are as follows: SDAP, PDCP, RLC, and MAC packet headers need to be added before the original data is transmitted at the physical layer. Of course, the headers of some layers are optional. For example, SDAP and RLC have transmission modes without headers. Among them, PDCP, SDAP and original data packets are in one-to-one correspondence. The RLC may cut a PDCP packet, and the MAC may cascade and send multiple RLC packets.

As shown in FIG. 3 , it is the protocol architecture (user plane protocol architecture) involved in cellular communication data transmission. Wherein, when the terminal device sends data to the server, the data packet is first generated by the application (application, APP) layer, and the packet generated by the APP layer (hereinafter referred to as the APP layer packet) may include a packet header and a payload. The APP layer packet can be a transmission control protocol (transmission control protocol, TCP)/Internet protocol (internet protocol, IP) packet (or in other words, the packet header of the APP layer packet is a TCP/IP packet header), or it can be an Ethernet (ethernet) protocol. The MAC packet (or in other words, the packet header of the APP layer packet is the ethernet packet header) is not limited here. Correspondingly, when the data packet arrives at the server, the application layer of the server parses the data sent by the terminal device.

The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC.

And, unless otherwise specified, ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or importance of multiple objects degree. For example, the first threshold and the second threshold are only for distinguishing different thresholds, and do not indicate the difference in priority or importance of the two thresholds.

An optional network architecture applicable to the embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 4 is a schematic diagram of a network architecture to which an embodiment of the present application is applied. As shown in FIG. 4 , the terminal equipment 431 and the terminal equipment 432 can be connected to the RAN equipment 410 and the core network equipment (also referred to as CN equipment) 420, wherein the RAN equipment 410 is used to access the terminal equipment 431 and the terminal equipment 432 to the In the wireless network, the CN device 420 is used to manage the terminal device and provide a gateway for communication with the external network. In this embodiment of the present application, the terminal device 431 and the terminal device 432 send communication data to each other, and the terminal device 431 and the terminal device 432 may be referred to as a service pair.

When the network architecture shown in FIG. 4 is applicable to a 5G communication system, the CN device 420 may be an AMF entity, an SMF entity or a UPF entity, etc. When the network architecture shown in FIG. 2 is applicable to an LTE communication system, the CN device 420 may be MME or S-GW etc.

The network architecture shown in Figure 4 above can be applied to communication systems of various radio access technologies (RATs), such as 5G (or NR) communication systems, or LTE communication systems and 5G communication. The transition system between systems, the transition system can also be called a 4.5G communication system, and of course it can also be a future communication system following 5G. The network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The embodiments of the present application will be described below with reference to the accompanying drawings.

The communication method provided by the embodiment of the present application can be executed by the first terminal device, the second terminal device, and the first network device. The first terminal device and the second terminal device may include the terminal device 101 shown in FIG. 1, and the first network device may include the core network device shown in FIG. 1; or, the first terminal device and the second terminal device may be respectively For the terminal device 431 and the terminal device 432 shown in FIG. 4 , the first network device may include the core network device 420 shown in FIG. 4 . The core network device shown in FIG. 1 above or the core network device 420 shown in FIG. 4 may be a service server (server) (hereinafter referred to as a server) or a UPF.

As shown in Figure 5, the method may include the following steps:

S101: The first terminal device sends a first data packet, where the first data packet includes first indication information and first data.

Correspondingly, the first network device receives the first data packet.

S102: The second terminal device sends a second data packet, where the second data packet includes second indication information and second data.

Correspondingly, the first network device receives the second data packet.

It should be understood that the sequence between the steps shown in the above S101 and S102 is not specifically limited, and S101 may be performed first, or S102 may be performed first.

S103: The first network device obtains third data according to the first data and the second data, and the third data, the second data and the first data have an exclusive OR relationship.

S104: The first network device sends a third data packet, where the third data packet includes the first indication information, the second indication information, and the third data.

Correspondingly, the first terminal device receives the third data packet, and the second terminal device receives the third data packet.

S105: The first terminal device obtains the second data according to the first indication information.

Exemplarily, the first terminal device may perform an XOR operation (or an inverse XOR operation) on the first data and the third data according to the first indication information to obtain the third data.

S106: The second terminal device obtains the first data according to the second indication information.

Exemplarily, the second terminal device may perform an XOR operation (or an inverse XOR operation) on the second data and the third data according to the second indication information to obtain the first data.

Using the above method, when the first terminal device and the second terminal device communicate with each other, the network device performs XOR processing on the first data sent by the first terminal device and the second data sent by the second terminal device to form third data, and send a third data packet including the third data to the first terminal device and/or the second terminal device. The first terminal device processes the third data and the first data to obtain the second data according to the first indication information, and/or the second terminal device processes the third data and the second data to obtain the first data according to the second indication information. data. Therefore, when the first terminal device and the second terminal device communicate with each other, the first network device can send XOR-processed data to the first terminal device and the second terminal device for the first terminal device and the second terminal device. The device obtains the data it needs separately, which can reduce the air interface consumption during downlink transmission.

Exemplarily, the first network device may send the third data packet to the first terminal device and the second terminal device in a multicast manner, so as to further save air interface consumption.

The possible structure of the first data packet is described below by way of example.

Exemplarily, the first indication information included in the first data packet may be used to identify the first data packet sent by the first terminal device, for example, the first indication information may be information used to identify the first data packet (or information used to identify the first data), such as a sequence number (sequence number, SN), for example, when SN=1 (or SN=0), it indicates that the first data packet is sent by the first terminal device to the second terminal device The first data packet of a service. Therefore, when the first terminal device determines that the third data packet includes the first indication information, it can query the first data packet according to the first indication information to obtain the first data (or in other words, it can query the first data according to the first indication information) ) for determining the second data according to the first data.

The first data may include data that the first terminal device needs to send to the second terminal device.

Optionally, the first data packet may further include third indication information and/or fourth indication information.

The third indication information can be used to indicate that the first terminal device and the second terminal device are target nodes to each other. Therefore, the indication information can be used to determine which data packets from which terminal devices need to be XORed. For example, the third indication information may include an address pair of the first terminal device and the second terminal device, that is, an address pair consisting of addresses of the first terminal device and the second terminal device respectively; or, the third indication information may include Service pair identifier (Pair ID), such as the identifier assigned by the network to the service pair formed by the first terminal device and the second terminal device; or, including the service identifier of the service transmitted between the first terminal device and the second terminal device, such as Temporary multicast group identifier (TMGI).

The fourth indication information may be used to indicate that the data in the first data packet has not undergone XOR processing, or in other words, the fourth indication information may be used to indicate that the data in the first data packet is original data. For example, the fourth indication information is represented by a specific bit in the first data packet, and when the bit is set to a specific value, it can indicate that the data in the first data packet has not undergone XOR processing.

As shown in FIG. 6 , in a possible example, the first data packet may carry the first indication information, the first data, the third indication information and the fourth indication information through different information elements, wherein the third indication The information and the fourth indication information are optional. It should be understood that the cell structure shown in FIG. 6 is only a possible example, and the present application does not specifically limit the sequence of the arrangement of the first indication information, the first data, the third indication information and the fourth indication information. In addition, at least two of the above first indication information, first data, third indication information and fourth indication information may also be carried in the same cell, for example, different bits in the same cell indicate that the above multiple at least two of the information.

Optionally, the first data may be carried at the APP layer. The first indication information, the third indication information and the fourth indication information may be carried in the APP layer or the XOR layer (wherein, the XOR layer may also have other names, and the specific names are not specifically limited in this application). The XOR layer is a protocol layer above the PDCP layer and below the application layer. For example, the XOR layer is a protocol layer between the SDPA layer and the APP layer.

When the first indication information, the third indication information and the fourth indication information are carried in the APP layer, as shown in FIG. 7 , the first indication information, the first data, the third indication information and the fourth indication information can be carried in the APP layer in the payload. Wherein, the fourth indication information and the third indication information are optional contents.

When the first indication information, the third indication information and the fourth indication information are carried in the XOR layer, as shown in FIG. 8 , the first indication information, the third indication information and the fourth indication information can be carried in the packet header of the XOR layer, The first data can be carried in the payload of the APP layer packet, and the APP layer packet is used as the payload of the XOR layer. Wherein, the fourth indication information and the third indication information are optional contents.

It should be understood that the structure of the second data packet may refer to the structure of the first data packet. Wherein, the second data packet may include second indication information, second data, third indication information and/or fourth indication information. The second indication information here is used to identify the second data packet sent by the second terminal device, and the setting method of the second indication information may be set with reference to the first indication information. The second data is data sent by the second terminal device to the first terminal device. The third indication information in the second data packet may be used to indicate that the first terminal device and the second terminal device are mutual target nodes, and the setting method may refer to the third indication information in the first data packet. The fourth indication information in the second data packet may be used to indicate that the data in the second data packet has not undergone XOR processing, or in other words, the fourth indication information may be used to indicate that the data in the second data packet is original data.

The following example illustrates the manner in which the terminal device obtains the third indication information.

Manner 1: The first terminal device and/or the second network device receive the third indication information from the first network device.

When the first terminal device needs to transmit data of a certain service, the first terminal device sends first information to the first network device, where the first information may include the cell identifier of the first terminal device and the target address of the service to which the first data belongs. (that is, the destination address of the service to be sent, such as the address of the second terminal device) or at least one information in the source address of the service to which the first data belongs. The cell identifier is, for example, a cell global identifier (cell global identifier, CGI) or a physical cell identifier (physical cell identifier, PCI). The target address of the service is the address of the receiving end of the first data, here, for example, the address of the second terminal device. The source address of the service is the address of the sending end of the first data, here, for example, the address of the first terminal device.

It should be understood that, for the services carried by the IP protocol above, the target address and/or source address of the service include the IP address of the service; for the service carried by the ethernet protocol, the target address and/or source address of the service include the MAC address of the service; For services carried by other protocols, the destination address and/or source address of the service includes addresses corresponding to the protocol.

Similarly, the second terminal device sends the first information to the first network device, which carries at least one of the cell identifier of the second terminal device, the destination address of the service to which the second data belongs, or the source address of the service to which the second data belongs, For a specific setting method, reference may be made to the above description of the first information.

When the first network device receives the first information from the first terminal device and from the second terminal device, if the first network device recognizes that the first terminal device and the second terminal device belong to the same cell, and the first terminal device When the service data is transmitted with the second terminal device, the data between the first terminal device and the second terminal device can be XORed and sent to the first terminal device and the second terminal device. XOR-processed data, that is, execute the flow shown in FIG. 5 .

In this case, the first network device may send the second information to the first terminal device and the second terminal device, respectively. Taking the second information sent to the first terminal device as an example, the second information may include the above-mentioned third indication information, information used to indicate that the second data is obtained according to the third data and the first data, The multicast service identifier, the destination address (or multicast address) of the multicast service, the information used to indicate the sequence (or primary and secondary sequence) between the first terminal device and the second terminal device, all The identifier (identifier, ID) of the protocol data unit session (PDU session) of the third data packet, the ID of the quality of service flow (QoS) of the third data packet, or the ID of the third data packet. At least one piece of information in the ID of the data radio bearer (DRB) of the three data packets.

The third indication information may be used to indicate that the first terminal device and the second terminal device are mutual target nodes.

The information used for instructing to obtain the second data according to the third data and the first data may be used to instruct the first terminal device to obtain the data from the second terminal device according to the method shown in FIG. 5 . In a possible implementation manner, the information can be used to start the execution of the data transmission method shown in FIG. 5 , and all the downlink data subsequently sent to the first terminal device and/or the second terminal device are XOR-processed data , instead of needing to indicate through the fifth indication information in the second data packet. In this way, when the first terminal device receives the third data packet, it can obtain the second data according to the method shown in FIG. 5 . In another possible implementation manner, the information can be used to enable the data transmission method shown in FIG. 5 , but the data packets subsequently sent to the first terminal device and/or the second terminal device do not necessarily have to undergo XOR processing, It is still necessary to indicate whether the data in the data packet has undergone XOR processing through information similar to the fifth indication information in the downlink data packet. In this solution, if the first terminal device receives the information indicating that the second data is obtained according to the third data and the first data, and determines that the third data packet includes fifth indication information, it can The second data is acquired according to the manner shown in FIG. 5 .

The multicast service identifier is, for example, the TMGI of the multicast service, which can be used for receiving the second data packet. For example, the first terminal device can receive the data of the multicast service according to the identifier, and the data of the multicast service includes the third data packet. Data packets, or in other words, the multicast service is used to transmit XOR-processed data of the first terminal device and the second terminal device.

The destination address of the multicast service is the destination address of the third data packet, for example, the addresses of the first terminal device and/or the second terminal device. The multicast address can be an IP address or a MAC address.

The information used to indicate the sequence (or the primary and secondary sequence) between the first terminal device and the second terminal device can be used to determine the position of the first indication information in the third data packet, For example, when the first network device arranges the first indication information and the second indication information in sequence in the third data packet, the information can be used to indicate that the first indication information is located before (or after) the second indication information, so as to facilitate the The first terminal device acquires the first indication information in the third data packet. For example, the value of a specific bit can be set as the first value (corresponding to: the first indication information in the third data packet is located before the second indication information), then the first terminal device can The value determines the first indication information.

In addition, the second information may further include at least one of the PDU session ID, QoS flow ID or DRB ID of the third data packet, for the first terminal device to receive the first terminal device according to the corresponding PDU session, QoS flow or DRB. Three packets.

It should be understood that, in the first manner above, the first network device may be a server or a UPF, or a network element in other core networks.

Mode 2, when the first network device is a UPF, the first terminal device and/or the second network device can receive the third indication information from the second network device, and the second network device is another network device connected to the first network device. Core network equipment, such as AMF.

When the first terminal device sends data to the second terminal device, the source address of the data can be the application layer address of the first terminal device (such as the IP address or MAC address of the application layer, etc.), and the destination address is the application layer of the second terminal device. Layer address (for example, IP address or MAC address), the data is forwarded to the second terminal device through the UPF. Similarly, the data sent by the second terminal device to the first terminal device is also forwarded to the first terminal device through the UPF. When the UPF finds that there are two addresses that are the source address and the destination address of each other (or, plus the condition that the data transmission cycles of the source address and the destination address are mutually consistent), it determines that the services of the two terminal devices have potential Possibility of XOR operation.

As shown in FIG. 9 , when the UPF finds that there are two addresses that are the source address and the destination address of each other, the UPF can subsequently execute the first solution or the second solution or a combination of the two to execute the data between the first terminal device and the second terminal device. XOR transfer.

In the first solution, the UPF may send a first message to the AMF for requesting information about the cells where the first terminal equipment and the second terminal equipment are located, wherein the first message may carry the first terminal equipment and the second terminal equipment respectively The identifier in the core network, such as subscription permanent identifier (SUPI) or permanent equipment identifier (PEI). The AMF sends a second message (or a response message to the first message) to the UPF. The second message may include the respective serving cell identifiers of the first terminal equipment and the second terminal equipment, so the UPF can identify the first terminal equipment and the second terminal equipment. belong to the same community. If the UPF decides to transmit the XOR-processed data to the first terminal device and the second terminal device, the UPF may send a third message to the AMF to notify the AMF of the result, that is, to notify the AMF to the first terminal device and the second terminal device The terminal device sends the XOR-processed data, or in other words, instructs the AMF to send the XOR-processed data to the first terminal device and the second terminal device, and the notification may include the respective identities of the first terminal device and the second terminal device .

As shown in FIG. 10 , in this way, if it is decided to send XOR-processed data to the first terminal device and the second terminal device, the UPF can send the second information to the first terminal device and the second terminal device, for example, UPF The second information may be sent after it is determined that the serving cells of the first terminal equipment and the second terminal equipment are the same; and/or the second information may be sent by the AMF to the first terminal equipment and the second terminal equipment, for example, the AMF is in After receiving the third message, the second information is sent to the first terminal device and the second terminal device. For the setting method of the second information, please refer to the description in the first method. It should be understood that the present application does not limit the timing when the UPF (and/or AMF) sends the second information to the first terminal device and the second terminal device respectively.

In the second solution, as shown in FIG. 9 , the UPF may send a fourth message to the AMF, which is used to indicate that the first terminal device and the second terminal device are the source address and the destination address of data for each other. The fourth message may include the respective identifiers of the first terminal device and the second terminal device (eg, core network identifiers), and may also include the identifiers of the respective PDU sessions of the first terminal device and the second terminal device, and the source of the PDU session. address, target address and other information, the AMF can query the respective serving cells of the first terminal device and the second terminal device according to the fourth message, and determine the first terminal device according to the respective serving cells of the first terminal device and the second terminal device. Whether it is in the same cell as the second terminal device, to decide whether to transmit the XOR-processed data to the first terminal device and the second terminal device. If it is decided to transmit the XOR-processed data to the first terminal device and the second terminal device, a fifth message needs to be sent to the UPF to notify the UPF of the result, and the fifth message at least includes the first terminal device and the second terminal device. The respective identifications of the two terminal devices.

As shown in FIG. 10 , in this way, if it is decided to send XOR-processed data to the first terminal device and the second terminal device, the AMF can send the second information to the first terminal device and the second terminal device, for example, the AMF After it is determined that the serving cells of the first terminal device and the second terminal device are the same, the second information can be sent to the first terminal device and the second terminal device; and/or, the UPF can be used to send the second information to the first terminal device and the second terminal device. The second information, for example, after receiving the fifth message, the UPF sends the second information to the first terminal device and the second terminal device. For the setting method of the second information, please refer to the description in the first method. It should be understood that the present application does not limit the timing when the UPF (and/or AMF) sends the second information to the first terminal device and the second terminal device respectively.

A possible structure of the third data packet is described below by way of example.

The third data packet may include part or all of the first indication information, the second indication information, the third indication information, the fifth indication information or the third data.

Exemplarily, when the third data packet is sent to the first terminal device and the second terminal device, the third data packet may include first indication information and second indication information, wherein the first indication information comes from the first terminal device. The sent first data packet, and the second indication information comes from the second data packet sent by the second terminal device.

The third data packet can carry third indication information, and the third indication information can be used to identify the service between the first terminal device and the second terminal device. Therefore, the first terminal device can learn according to the third data packet according to the third indication information. The third data in the packet can obtain the data sent by the second terminal device, and the second terminal device can obtain the data sent by the first terminal device according to the third data in the third data packet according to the third indication information.

The third data packet may include fifth indication information, and the fifth indication information may be used to indicate that the third data undergoes XOR processing. It should be understood that the fifth indication information may be indicated by the same bit (or cell) as the fourth indication information, and the information carried by this bit may be called an exclusive or (XoR) indication. For example, when the bit When the bit (or cell) is set to the value corresponding to the fourth indication information, the bit (or cell) is the fourth indication information, and when the bit (or cell) is set to the value corresponding to the fifth indication information When the value is set, the bit (or cell) is the fifth indication information.

Optionally, the third data may be carried at the APP layer. The first indication information, the second indication information, the third indication information and the fifth indication information may be carried in the APP layer or the XOR layer.

When the first indication information, the second indication information, the third indication information and the fifth indication information are carried in the APP layer, as shown in FIG. 11 , the first indication information, the second indication information, the third indication information and the fifth indication information The information and third data can be carried in the APP layer payload. The fifth indication information and the third indication information are optional contents. When the first network device sends the third data packet to the first terminal device and the second terminal device in a multicast manner, the APP layer header shown in FIG. 11 may be a multicast header.

When the first indication information, the third indication information and the fifth indication information are carried in the XOR layer, as shown in FIG. 12 , the first indication information, the second indication information, the third indication information and the fifth indication information can be carried in the XOR layer In the header of the layer, the third data can be carried in the payload of the APP layer packet, and the APP layer packet is used as the payload of the XOR layer. The fifth indication information and the third indication information are optional contents. When the first network device sends the third data packet to the first terminal device and the second terminal device in a multicast manner, the APP layer header shown in FIG. 11 may be a multicast header. When the first network device sends the third data packet to the first terminal device and the second terminal device in a multicast manner, the APP layer header shown in FIG. 12 may be a multicast header.

The following describes the communication method provided by the present application through embodiments with reference to the accompanying drawings.

first embodiment

In the first embodiment of the present application, the first network device may be a server, the first terminal device and the second terminal device communicate with each other, and the first terminal device and the second terminal device may be connected to the same access network device. The first terminal device and the second terminal device may be referred to as paired terminal devices.

In this embodiment, the core network device is taken as an example for description. 13 is a flowchart of a communication method provided by the first embodiment of the present application, and the method may include the following steps:

S201: The first terminal device and the second terminal device are respectively connected to the Internet, and a server is found. In other words, the first terminal device and the second terminal device are respectively connected to the server.

This step may also be referred to as server discovery.

Wherein, the server corresponds to the data sent by the first terminal device and to the data sent by the second terminal device. In other words, the server is a server of the service to which the data sent by the first terminal device belongs, and is a server of the service of the data sent by the second terminal device.

S202: The first terminal device and the second terminal device respectively report at least one of the following information to the server: 1) The identity of the serving cell (or the cell where it is located), such as CGI and/or PCI. 2) The destination address of the data to be sent. If the service to which the data belongs is carried by the IP protocol, the service to which the data belongs is the IP address; if the service to which the data belongs is carried by the ethernet protocol, the target address is the MAC address; if the service to which the data belongs is carried by other protocols, the target address is the address corresponding to the protocol. 3) The source address of the data to be sent. Similarly, the source address can be an IP address, a MAC address, or an address corresponding to other protocols).

The above information reported to the server may be referred to as first information in this application.

S203: The server identifies that the first terminal device and the second terminal device satisfy at least condition 1 and condition 2, and determines that the XOR-processed data can be sent to the first terminal device and the second terminal device.

Condition 1 and Condition 2 can be expressed as:

Condition 1: The destination address of the data packet sent by the first terminal device is the second terminal device, and the destination address of the data packet sent by the second terminal device is the first terminal device. Or in other words, the first terminal device and the second terminal device are the source address and the destination address of the data sent by each other.

Condition 2: The serving cell of the first terminal device and the serving cell of the second terminal device are the same serving cell, and/or the serving network device of the first terminal device and the serving network device of the second terminal device are the same serving network device . The serving network device may be an access network device serving the first terminal device and/or the second terminal device.

Optionally, when the server identifies, according to the respective serving cell identifiers of the first terminal device and the second terminal device, that the first terminal device and the second terminal device are in the same cell, and that the first terminal device and the second terminal device are services of each other. When the target is reached, the server can start the data XOR function, so S204 can be executed.

In addition, the server may also identify that the first terminal device and the second terminal device are in the same cell according to the respective serving cell identifiers of the first terminal device and the second terminal device from the core network. Here, the method for the server to obtain the respective serving cell identities of the first terminal device and the second terminal device from the core network can refer to the process shown in FIG. The way of identifying the respective serving cells of the terminal equipment.

S204: The server sends the second information to the first terminal device and the second terminal device.

Wherein, the second information may include third indication information, information for instructing to obtain the second data according to the third data and the first data, a multicast service identifier, and a destination address of the multicast service (or called multicast address), information used to indicate the sequence between the first terminal device and the second terminal device, the ID of the PDU session of the third data packet, the ID of the QoS of the third data packet Or at least one piece of information in the ID of the DRB of the third data packet. For the description of the second information, reference may be made to the foregoing description.

S205: The server sends a multicast service start request to the core network device (such as AMF and/or UPF, etc.), which carries a multicast service identifier to start the multicast service. The multicast service is used to transmit XOR-processed data of the first terminal device and the second terminal device.

S206: The first terminal device and the second terminal device respectively send data packets (respectively the first data packet and the second data packet) to the server, and number the data packets respectively, for example, code them as ID1 (that is, the first indication information ) and ID2 (that is, the second indication information), and store the data packet (including the packet header) and the corresponding serial number at the APP layer or the XOR layer. And start a timer 1 and timer 2 respectively.

Optionally, the first data packet and the second data packet respectively sent by the first terminal device and the second terminal device to the server may further include third indication information and/or fourth indication information. For the contents carried by the first data packet and the second data packet, reference may be made to the foregoing description.

When the data packet (including the packet header) and the corresponding number are stored in the APP layer, or in other words, when the number is added in the APP layer, the structure of the data packet may be as shown in FIG. 7 . When the data packet (including the packet header) and the corresponding number are stored in the XOR layer, or in other words, when the number is added in the XOR layer, the structure of the data packet may be as shown in FIG. 8 .

S207: After the server receives the data packets sent by the first terminal device and the second terminal device, if the time interval between the arrival of the two data packets is within the first duration The data in the device packet and the packet header part are XORed to generate a new data packet (that is, the third data packet), and sent to the core network through the link related to the multicast service identifier indicated to the terminal device in S204 The device (such as the UPF, etc.) and the access network device, the core network device and the access network device send the third data packet to the first terminal device and the second terminal device in a multicast manner.

Wherein, the new data packet may include first indication information, second indication information and third data. Optionally, the third data packet may further include third indication information and fifth indication information. For the content carried by the third data packet, reference may be made to the foregoing description.

When the first indication information in the first data packet is located at the APP layer, and the second indication information in the second data packet is located at the APP layer, the structure of the new data packet may be as shown in FIG. 11 . When the first indication information in the first data packet is located at the XOR layer, and the second indication information in the second data packet is located at the APP layer, the structure of the new data packet may be as shown in FIG. 12 .

It should be understood that if the header of the third data packet is an IP header, then the target address of the third data packet can be set to the IP multicast address of the multicast service; if the header of the third data packet is the ethernet header, then the The destination address of the three packets is set to the MAC multicast address.

S208: The first terminal device and the second terminal device use the second information received in S204 to receive the third data packet sent by multicast, and search for the data packets previously stored in the APP layer or respectively according to the numbers in the third data packets. The XOR layer stores the data packets with the same number (including the packet header), obtains the data in the data packets, performs XOR operation on the third data packet according to the data, and obtains the data after the XOR operation.

For example, when the TMGI is indicated in the second information, the first terminal device and the second terminal device can respectively receive the multicast service associated with the TMGI according to the TMGI to obtain the third data packet.

With the above first embodiment, the server can determine the data to be XORed to the first terminal device and the second terminal device, so as to reduce downlink overhead.

When the first indication information in the first data packet is located at the APP layer, the protocol architecture (user plane protocol architecture) involved in the above data transmission process is shown in FIG. 14 . It can be seen that when the first terminal device and the second terminal device send data to the server, the first terminal device and the second terminal device can generate a data packet at the APP layer, and the data packet can have the structure shown in FIG. A first data packet generated by a terminal device may include first data, and a second data packet generated by a second terminal device may include second data. In addition, the APP layer of the first terminal device may store the first indication information and the first data, and the APP layer of the second terminal device may store the second indication information and the second data. When the server sends a third data packet to the first terminal device and the second terminal device, the server may generate a data packet at the APP layer, and the data packet may have the structure shown in FIG. 11 , wherein the payload of the data packet carries the third data packet. data, and then the server sends the third data packet to the first terminal device and the second terminal device. After that, the APP layer of the first terminal device can determine that the third data packet includes the first indication information according to the stored first indication information, and further perform an exclusive OR operation according to the third data and the stored first data to obtain the second data . Similarly, the APP layer of the second terminal device can determine that the third data packet includes the second indication information according to the stored second indication information, and further can perform an exclusive OR operation according to the third data and the stored second data to obtain the second data packet. data.

When the first indication information in the first data packet is located at the XOR layer, the protocol architecture (user plane protocol architecture) involved in the above data transmission process is shown in FIG. 15 . It can be seen that when the first terminal device and the second terminal device send data to the server, the first terminal device and the second terminal device can generate data packets at the APP layer, and the load of the data packets generated by the first terminal device can include the first data , the payload of the data packet generated by the first terminal device may include the second data; the XOR layers (which may also have other names) of the first terminal device and the second terminal device respectively use the data packet generated by the APP layer as the payload to generate the XOR layer Data packet, the structure of the XOR layer data packet is shown in Figure 8. It should be understood that this application does not exclude that other protocol layers (such as TCP/user datagram protocol (UDP) layer, IP or MAC layer, etc.) are included between the XOR layer and the APP layer, then at this time, The XOR layer may use other layer data packets including the APP layer data packets as payloads to generate XOR layer data packets.

Exemplarily, the header of the XOR layer data packet generated by the first terminal device may include fourth indication information, first indication information, and third indication information, wherein the fourth indication information and the third indication information are optional; The packet header of the XOR layer data packet generated by the second terminal device may include fourth indication information, first indication information, and third indication information, where the fourth indication information and the third indication information are optional. In addition, the XOR layer of the first terminal device may store the first indication information and the first data, and the XOR layer of the second terminal device may store the second indication information and the second data. When the server sends the third data packet to the first terminal device and the second terminal device, the server may generate an APP layer data packet at the APP layer, and the load of the APP layer data packet may include the third data. The XOR layer can use the APP layer data packet as a payload to generate an XOR layer data packet, and the XOR layer data packet can have the structure shown in FIG. 12 . For example, the packet header of the XOR layer data packet may include fifth indication information, first indication information, second indication information and third indication information, wherein the fifth indication information and the third indication information are optional. Afterwards, the server may send the third data packet to the first terminal device and the second terminal device respectively. It can be determined by the XOR layer of the first terminal equipment that the third data packet includes the first indication information according to the stored first indication information, and further, an XOR operation can be performed according to the third data and the stored first data to obtain the second data. Similarly, the XOR layer of the second terminal device can determine that the third data packet includes the second indication information according to the stored second indication information, and can further perform an XOR operation according to the third data and the stored second data to obtain the second data packet. data.

Second Embodiment

In the second embodiment of the present application, the first network device may be a UPF. The first terminal device and the second terminal device communicate with each other, and the first terminal device and the second terminal device may be connected to the same access network device. The first terminal device and the second terminal device may be referred to as paired terminal devices.

In this embodiment, the core network device is a UPF as an example for description. FIG. 16 is a flowchart of a communication method provided by the second embodiment of the present application, and the method may include the following steps:

S301: The first terminal device and the second terminal device respectively send data packets to the UPF (wherein, the data packet from the first terminal device may be referred to as the first data packet, and the data packet from the second terminal device may be referred to as the first data packet two packets).

The application layer address of the data packet (or data) sent by the first terminal device is the application layer address of the second terminal device, so the data needs to be forwarded by the UPF to reach the second terminal device. Similarly, the application layer address of the packet (or data) sent by the second terminal device is the application layer address of the first terminal device, so the data needs to be forwarded by the UPF to reach the first terminal device.

S302: According to the data packets from the first terminal device and the second terminal device, the UPF determines that the destination address of the data from the first terminal device is the address of the second terminal device, and the destination of the data from the second terminal device The address is the address of the first terminal device. Or in other words, the first terminal device and the second terminal device are the source address and destination address of the data sent by each other, or in other words, it is determined that the destination address of the data packet sent by the first terminal device is the second terminal device, And the destination address of the data packet sent by the second terminal device is the first terminal device.

Thereafter, the steps shown in S303-S306 may be performed, or the steps S307-S309 may be performed.

S303: The UPF sends a first message to the AMF, which is used to request the identifiers of the respective serving cells of the first terminal device and the second terminal device.

Wherein, the first message may carry the respective identifiers of the first terminal device and the second terminal device.

S304: The UPF receives the second message from the AMF, which includes the identifiers of the respective serving cells of the first terminal device and the second terminal device.

S305: The UPF determines, according to the identities of the respective serving cells of the first terminal device and the second terminal device, that the first terminal device and the second terminal device belong to the same serving cell.

S306: The UPF sends a third message to the AMF, which is used to instruct to send the XOR-processed data to the first terminal device and the second terminal device.

The third message includes the respective identifiers of the first terminal device and the second terminal device.

S307: The UPF sends a fourth message to the AMF, which is used to indicate that the first terminal device and the second terminal device are the source address and the destination address of each other's data.

S308: The AMF determines, according to the fourth message, that the serving cells to which the first terminal device and the second terminal device belong are the same.

S309: The AMF sends a fifth message to the UPF, which is used to instruct to send the XOR-processed data to the first terminal device and the second terminal device.

After S306 and S309, the steps shown in S310 or S311 may be performed.

S310: The UPF sends the second information to the first terminal device and the second terminal device.

S311: The AMF sends the second information to the first terminal device and the second terminal device.

S312: The first terminal device and the second terminal device respectively send data packets (respectively the first data packet and the second data packet) to the UPF, and number the data packets respectively, for example, code them as ID1 (that is, the first indication information ) and ID2 (that is, the second indication information), and store the data packet (including the packet header) and the corresponding serial number at the APP layer or the XOR layer. And start a timer 1 and timer 2 respectively.

Optionally, the first data packet and the second data packet respectively sent by the first terminal device and the second terminal device to the UPF may further include third indication information and/or fourth indication information. For the contents carried by the first data packet and the second data packet, reference may be made to the foregoing description.

S313: After the UPF receives the packets sent by the first terminal device and the second terminal device, if the time interval between the arrival of the two packets is within the first duration The data and the packet header part in the XOR operation are performed to generate a new data packet (that is, the third data packet), and sent to the core network equipment ( Such as UPF, etc.) and the access network device, the core network device and the access network device send the third data packet to the first terminal device and the second terminal device by multicast. The first duration may be determined in a pre-configured manner, or indicated by the server.

S314: The first terminal device and the second terminal device use the second information received in S310 or S311 to receive the third data packet sent in a multicast manner, and search for the data packets previously stored in the The data packet (including the packet header) with the same number stored in the APP layer or the XOR layer is obtained, and the data in the data packet is obtained, and the XOR operation is performed on the third data packet according to the data to obtain the data after the XOR operation.

With the above first embodiment, the UPF or the AMF can determine the data that has undergone XOR processing to the first terminal device and the second terminal device, so as to reduce downlink overhead.

When the first indication information in the first data packet is located at the XOR layer, the protocol architecture (user plane protocol architecture) involved in the above data transmission process is shown in FIG. 17 . It can be seen that when the first terminal device and the second terminal device send data to the UPF, the first terminal device and the second terminal device can generate data packets at the APP layer, and the payload of the data packets generated by the first terminal device can include the first data , the payload of the data packet generated by the first terminal device may include the second data; the XOR layers (which may also have other names) of the first terminal device and the second terminal device respectively use the data packet generated by the APP layer as the payload to generate the XOR layer Data packet, the structure of the XOR layer data packet is shown in Figure 8. It should be understood that this application does not exclude that other protocol layers (such as TCP/UDP layer, IP or MAC layer, etc.) are included between the XOR layer and the APP layer. At this time, the XOR layer may include the APP layer data packets. Other layer packets are used as payloads to generate XOR layer packets.

Exemplarily, the header of the XOR layer data packet generated by the first terminal device may include fourth indication information, first indication information, and third indication information, wherein the fourth indication information and the third indication information are optional; The packet header of the XOR layer data packet generated by the second terminal device may include fourth indication information, first indication information, and third indication information, where the fourth indication information and the third indication information are optional. In addition, the XOR layer of the first terminal device may store the first indication information and the first data, and the XOR layer of the second terminal device may store the second indication information and the second data. When the UPF sends the third data packet to the first terminal device and the second terminal device, the UPF may generate an APP layer data packet at the APP layer, and the load of the APP layer data packet may include the third data, and thereafter, the first network device's The XOR layer can use the APP layer data packet as a payload to generate an XOR layer data packet, and the XOR layer data packet can have the structure shown in FIG. 12 . For example, the packet header of the XOR layer data packet may include fifth indication information, first indication information, second indication information and third indication information, wherein the fifth indication information and the third indication information are optional. Afterwards, the UPF may send the third data packet to the first terminal device and the second terminal device, respectively. The XOR layer of the first terminal device can determine that the third data packet includes the first indication information according to the stored first indication information, and further can perform an exclusive OR operation according to the third data and the stored first data to obtain the second data. Similarly, the XOR layer of the second terminal device can determine that the third data packet includes the second indication information according to the stored second indication information, and can further perform an XOR operation according to the third data and the stored second data to obtain the second data packet. data.

The following describes a communication device used to implement the above method in the embodiments of the present application with reference to the accompanying drawings. Therefore, the above content can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 18 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application. Exemplarily, the communication device is, for example, the communication device 1800 shown in FIG. 18 .

The communication device 1800 includes a processing module 1810 and a transceiver module 1820 . Exemplarily, the communication apparatus 1800 may be the first network device, or may be a chip applied in the first network device (such as a server, UPF or other core network element) or other combined device having the function of the first network device. , components, etc. When the communication apparatus 1800 is the first network device, the transceiver module 1820 may be a transceiver, the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1810 may be a processor, such as a baseband processor, and the baseband processor may include one or more Multiple central processing units (CPUs). When the communication apparatus 1800 is a component having the above-mentioned first network device function, the transceiver module 1820 may be a radio frequency unit, and the processing module 1810 may be a processor, such as a baseband processor. When the communication device 1800 is a system-on-chip, the transceiver module 1820 may be an input/output interface of a chip (eg, a baseband chip), and the processing module 1810 may be a processor of the system-on-chip, which may include one or more central processing units. It should be understood that the processing module 1810 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 1820 may be implemented by a transceiver or a circuit component related to the transceiver.

For example, the processing module 1810 may be configured to perform all operations performed by the first network device in the flow shown in FIG. 5 , FIG. 13 or FIG. 16 , except for the transceiving operation, such as the exclusive operation of the first data and the second data. or operations, S103, S203, S302, and S305, etc.; and/or other processes for supporting the techniques described herein, such as generating messages, information, and/or signaling sent by the transceiving module 1820, and Received messages, information and/or signaling are processed. The transceiver module 1820 may be configured to perform all receiving and sending operations performed by the first network device in the embodiment shown in FIG. 5, FIG. 13 or FIG. 16, such as S101, S102, S104-S105, S202, S204-206, The receiving and transmitting actions involved in S301, S303-S304, S306-S307, S309, S310, S311, S312, and S313; and/or other processes for supporting the techniques described herein.

In addition, the transceiver module 1820 may be a functional module, and the function module can complete both the sending operation and the receiving operation. For example, the transceiver module 1820 may be used to perform the first operation in the embodiments shown in FIG. 5 , FIG. 13 or FIG. 16 . All sending and receiving operations performed by the network device. For example, when performing a sending operation, the transceiver module 1820 can be considered as a sending module, and when performing a receiving operation, the transceiver module 1820 can be considered as a receiving module; or, the transceiver module 1820 It can also be two functional modules. The transceiver module 1820 can be regarded as a general term for these two functional modules. These two functional modules are respectively a sending module and a receiving module. The sending module is used to complete the sending operation. For example, the sending module can be used to execute For all sending operations performed by the first network device in the embodiment shown in FIG. 5, FIG. 13 or FIG. 16, the receiving module is used to complete the receiving operation. For example, the receiving module can be used to perform the operations shown in FIG. 5, FIG. All receive operations performed by the first network device in the illustrated embodiment.

Wherein, when the method shown in FIG. 5 is executed, the transceiver module 1820 may receive the first data packet from the first terminal device by the first network device, where the first data packet includes the first indication information and the first data, and, A second data packet is received from the second terminal device, where the second data packet includes second indication information and second data. The transceiver module 1820 may also send a third data packet to the first terminal device and the second terminal device, where the third data packet includes the first indication information, the second indication information and third data, the third data, There is an exclusive OR relationship between the second data and the first data. The processing module 1810 may be configured to obtain third data according to the first data and the second data, for example, perform XOR processing on the first data and the second data to obtain the third data.

In a possible example, the transceiver module 1820 may receive first information from the first terminal device, where the first information includes at least one of the following information:

the cell identifier of the first terminal device;

The target address of the service to which the first data belongs; or,

The source address of the service to which the first data belongs.

In a possible example, the transceiver module 1820 may send second information to the first terminal device; the second information includes at least one of the following information: third indication information, where the third indication information is used to indicate the first terminal device. A terminal device and a second terminal device are mutual target nodes; or, information used to indicate that the second data is obtained according to the third data and the first data; or a multicast service identifier, the multicast service identifier used for the reception of the second data packet; or, the target address of the multicast service, the target address of the multicast service is the target address of the third data packet; or, used to indicate the first terminal device and the second Information about the sequence between terminal devices, the sequence is used to determine the position of the first indication information in the third data packet; or, the PDU session ID of the third data packet; or, the third data packet The ID of the QoS flow; or, the ID of the DRB of the third data packet.

In a possible example, the transceiver module 1820 may send the second data packet to the first terminal device and the second terminal device in a multicast manner.

In a possible example, the first network device includes a UPF, and the transceiver module 1820 may send third information to the second network device, where the third information is used to request the cell identity of the first terminal device and the second terminal The cell identifier of the device; the cell identifier of the first terminal device and the cell identifier of the second terminal device are received from the second network device; the processing module 1810 can determine the cell identifier of the first terminal device and the cell identifier of the second terminal device. The cell IDs are the same.

In a possible example, the first network device includes a UPF, and the transceiver module 1820 may also send fourth information to the second network device, where the fourth information is used to instruct the first terminal device to communicate with the second terminal device is a target node; receives fifth information from the second network device, where the fifth information is used to instruct the first network device to determine that the cell identity of the first terminal device is the same as the cell identity of the second terminal device, or , and the fifth information is used to determine to send the second data packet to the first terminal device and the second terminal device by multicast.

As shown in FIG. 19 , the communication device 1900 includes a processing module 1910 and a transceiver module 1920 . Exemplarily, the communication apparatus 1900 may be the first terminal device (or the second terminal device), or may be a chip applied in the first terminal device (or the second terminal device), or other devices with the first terminal device (or the second terminal device). Combination devices, components, etc. When the communication apparatus 1900 is the first terminal device (or the second terminal device), the transceiver module 1920 may be a transceiver, the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1910 may be a processor, such as a baseband processor, a baseband The processor may include one or more central processing units (CPUs). When the communication apparatus 1900 is a component having the above-mentioned functions of the first terminal device (or the second terminal device), the transceiver module 1920 may be a radio frequency unit, and the processing module 1910 may be a processor, such as a baseband processor. When the communication device 1900 is a chip system, the transceiver module 1920 may be an input/output interface of a chip (eg, a baseband chip), and the processing module 1910 may be a processor of the chip system, which may include one or more central processing units. It should be understood that the processing module 1910 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 1920 may be implemented by a transceiver or a circuit component related to the transceiver.

For example, the processing module 1910 may be configured to perform all operations except the transceiving operation performed by the first terminal device (or the second terminal device) in the flow shown in FIG. 5 , FIG. 13 or FIG. 16 , such as performing S103 , Steps such as S208 and S314; and/or other processes for supporting the techniques described herein, such as generating messages, information and/or signaling sent by the transceiving module 1920, and / or signaling for processing. The transceiver module 1920 can be used to perform all the receiving and sending operations performed by the first terminal device (or the second terminal device) in the embodiment shown in FIG. 5, FIG. 13 or FIG. 16, such as S101, S102, S104-S105 and/or other processes for supporting the techniques described herein.

In addition, the transceiver module 1920 may be a functional module, and the function module can perform both sending and receiving operations. For example, the transceiver module 1920 may be used to perform the first operation in the embodiments shown in FIG. 5 , FIG. 13 or FIG. 16 . All sending and receiving operations performed by the terminal device (or the second terminal device). For example, when performing a sending operation, the transceiver module 1920 can be considered as a sending module, and when performing a receiving operation, the transceiver module 1920 can be considered as a receiving operation. Alternatively, the transceiver module 1920 can also be two functional modules, and the transceiver module 1920 can be regarded as a general term for these two functional modules, these two functional modules are respectively a sending module and a receiving module, the sending module is used to complete the sending operation, For example, the sending module can be used to perform all sending operations performed by the first terminal device (or the second terminal device) in the embodiment shown in FIG. 5, FIG. 13 or FIG. 16, and the receiving module can be used to complete receiving operations, such as receiving The module can be used to perform all the receiving operations performed by the first terminal device (or the second terminal device) in the embodiment shown in FIG. 5 , FIG. 13 or FIG. 16 .

Wherein, when the method shown in FIG. 5 is executed, the transceiver module 1920 may send a first data packet, where the first data packet includes first indication information and first data, and receive a third data packet from the first network device, the first data packet The three data packets include the first indication information and the third data, and the processing module 1910 can obtain the second data according to the first indication information, wherein the third data, the second data and the first data are different from each other. or relationship.

In a possible example, the processing module 1910 stores the first indication information and the first data in the specific protocol layer of the first terminal device; the processing module 1910 stores the first indication information and the first data in the specific protocol layer of the first terminal device according to the The first indication information and the first data are used to obtain the second data. and / or,

The processing module 1910 determines that the third data packet includes the first indication information according to the first indication information stored in the specific protocol layer of the first terminal device; the processing module determines that the third data packet includes the first indication information according to the first indication information stored in the specific protocol layer of the first terminal device. One data and the third data and the first data, the second data is obtained.

In a possible example, the transceiver module 1920 may also send first information to the first network device, where the first information includes at least one of the following information: a cell identifier of the first terminal device; or, the first information The destination address of the service to which the data belongs; or, the source address of the service to which the first data belongs.

In a possible example, the transceiver module 1920 may also receive second information from the first network device or a second network device (eg, AMF), and the second network device is connected to the first network device; the first network device is connected to the first network device. The second information includes at least one of the following information: third indication information, where the third indication information is used to indicate that the first terminal device and the second terminal device are mutual target nodes; or, used to indicate that according to the third data and the first data to obtain the information of the second data; or, the multicast service identifier, the multicast service identifier is used for receiving the second data packet; or, the target address of the multicast service, the target address of the multicast service The address is the destination address of the second data packet; or, information used to indicate the sequence (or primary and secondary sequence) between the first terminal device and the second terminal device, and the sequence is used to determine the first The position of the indication information in the second data packet; or, the PDU session ID of the third data packet; or, the ID of the QoS flow of the third data packet; or, the ID of the DRB of the third data packet.

FIG. 20 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application, and the communication apparatus may be implemented by hardware components. The apparatus 2000 shown in FIG. 20 may be a first terminal device or a second terminal device, or may be a chip, a chip system, or a processor that supports the first terminal device or the second terminal device to implement the above method. The apparatus 2000 can be used to implement the method performed by the first network device described in the method embodiment shown in FIG. 6 . For example, the apparatus 2000 includes a module or unit corresponding to the first network device performing the steps described in the embodiments of this application or means, the functions or units or means may be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware. For details, further reference may be made to the corresponding descriptions in the foregoing corresponding method embodiments.

Taking a hardware implementation as an example, the apparatus 2000 may include one or more processors 2001, and the processors 2001 may also be referred to as processing units, which may implement certain control functions. The processor 2001 may be a general-purpose processor or a special-purpose processor or the like. For example, it may be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to process communication devices (eg, base stations, baseband chips, terminals, terminal chips, distributed units (DUs) or centralized units (centralized units). unit, CU), etc.) to control, execute software programs, and process data of software programs.

In an optional design, the processor 2001 may store instructions 2003 and/or data, and the instructions 2003 and/or data may be executed by the processor, so that the apparatus 2000 executes the methods described in the foregoing method embodiments. Methods.

In another optional design, the processor 2001 may include a transceiver unit for implementing receiving and transmitting functions. For example, the transceiver unit may be a transceiver circuit, or an interface, or an interface circuit. Transceiver circuits, interfaces or interface circuits used to implement receiving and transmitting functions may be separate or integrated. The above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transmission.

In yet another possible design, the apparatus 2000 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments.

Optionally, the apparatus 2000 may include one or more memories 2002 on which instructions 2004 may be stored, and the instructions may be executed on the processor, so that the apparatus 2000 executes the above method embodiments method described. Optionally, data may also be stored in the memory. Optionally, instructions and/or data may also be stored in the processor. The processor and the memory can be provided separately or integrated together. For example, the corresponding relationship described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the apparatus 2000 may further include a transceiver 2005 and/or a communication interface 2006 . The processor 2001 may be referred to as a processing unit, and controls the apparatus 2000 . The transceiver 2005 can be used to implement wireless communication, and the communication interface 2006 can be used to implement wired communication. The transceiver 2005 and/or the communication interface 2006 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver device, or a transceiver module, etc., for implementing a transceiver function.

Optionally, the processor 2001 may be used to implement the function of the processing module 1810 shown in FIG. 18 , the transceiver 2005 and/or the communication interface 2006 may be used to implement the function of the transceiver module 1820 shown in FIG. 18 , and the apparatus 2000 in this embodiment of the present application It can be used to execute the method implemented by the first network device described in the foregoing embodiments of the present application.

When the communication device is a terminal device, FIG. 21 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, in FIG. 21 , the terminal device takes a mobile phone as an example. As shown in Figure 21, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 21 . In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiments of the present application, the antenna and the radio frequency circuit with the transceiver function may be regarded as the transceiver unit of the terminal device (the transceiver unit may be a functional unit, and the function unit can realize the sending function and the receiving function; alternatively, the transceiver unit may also be It includes two functional units, namely a receiving unit capable of realizing a receiving function and a transmitting unit capable of realizing a transmitting function), and a processor with a processing function is regarded as a processing unit of the terminal device. As shown in FIG. 21 , the terminal device includes a transceiver unit 2110 and a processing unit 2120 . The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc., and may include a radio frequency circuit and an antenna. The processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 2110 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 2110 may be regarded as a transmitting unit, that is, the transceiver unit 2110 includes a receiving unit and a transmitting unit. The receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like. The transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

It should be understood that the transceiving unit 2110 is configured to perform the sending and receiving operations of the terminal device in the above method embodiments, and the processing unit 2120 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.

Optionally, the processing unit 2120 may be used to implement the functions of the processing module 1910 shown in FIG. 19 , the transceiver unit 2110 may be used to implement the functions of the transceiver module 1920 shown in FIG. 19 , and the apparatus 2000 in this embodiment of the present application may be used to execute the present application. The methods described in the foregoing embodiments are implemented by the first network device.

Embodiments of the present application provide a communication system. The communication system may include the first terminal device, the second terminal device, and the first network device involved in the above-mentioned embodiment shown in FIG. 1 or FIG. 4 . Optionally, the communication system may further include the second network device involved in this application. Optionally, the communication system may implement the communication method of FIG. 5 , FIG. 13 or FIG. 16 .

Embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program. When the computer program is executed by a computer, the computer can implement FIG. 5 , FIG. 13 or FIG. 16 provided by the foregoing method embodiments. Processes related to the first terminal device, the second terminal device and/or the first network device in the illustrated embodiment.

Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program. When the computer program is executed by a computer, the computer can implement the implementation shown in FIG. 5 , FIG. 13 or FIG. 16 provided by the above method embodiments. In the example, the process related to the first terminal device, the second terminal device and/or the first network device.

An embodiment of the present application further provides a chip or a chip system (or circuit), where the chip may include a processor, and the processor may be configured to call a program or an instruction in a memory, and execute FIG. 5 , FIG. 13 or FIG. A process related to the first terminal device, the second terminal device and/or the first network device in the embodiment shown in FIG. 16 . The chip system may include the chip and other components such as memory or transceivers.

It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, and may also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), 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 link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed communication method and communication device may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that makes a contribution or a part of the technical solution. The computer software product is stored in a storage medium and includes several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: the computer-readable medium may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The above are only specific implementations of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present application, All should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

A communication method, characterized in that, applied to a first network device, comprising:

receiving a first data packet from a first terminal device, where the first data packet includes first indication information and first data;

receiving a second data packet from the second terminal device, where the second data packet includes second indication information and second data;

Send a third data packet to the first terminal device and the second terminal device, where the third data packet includes the first indication information, the second indication information and third data, the third data , there is an exclusive OR relationship between the second data and the first data.
The method of claim 1, wherein the first data packet further comprises:

third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or,

Fourth indication information, where the fourth indication information is used to indicate that the first data has not undergone XOR processing.
The method according to claim 1 or 2, wherein the third data packet further comprises:

third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or,

Fifth indication information, where the fifth indication information is used to indicate that the third data is subjected to XOR processing.
The method according to claim 2 or 3, wherein the third indication information comprises an address pair consisting of the address of the first terminal device and the address of the second terminal device.
The method according to claim 4, wherein the first indication information is carried in a specific protocol layer, the specific protocol layer includes an application APP layer or an XOR layer, and the XOR layer is located between the PDCP layer and the between the APP layers.
The method of any one of claims 1-5, further comprising:

Receive first information from the first terminal device, where the first information includes at least one of the following information:

the cell identifier of the first terminal device; or,

the target address of the service to which the first data belongs; or,

The source address of the service to which the first data belongs.
The method of any one of claims 4-6, further comprising:

sending second information to the first terminal device;

The second information includes at least one of the following information:

third indication information, where the third indication information is used to indicate that the first terminal device and the second terminal device are mutual target nodes; or,

information used to indicate that the second data is obtained according to the third data and the first data; or,

a multicast service identifier, where the multicast service identifier is used for receiving the second data packet; or,

the target address of the multicast service, where the target address of the multicast service is the target address of the third data packet; or,

information used to indicate the sequence between the first terminal device and the second terminal device, where the sequence is used to determine the position of the first indication information in the third data packet; or,

The protocol data unit session identifier PDU session ID of the third data packet; or,

the ID of the quality of service flow QoS flow of the third data packet; or,

The data of the third data packet wirelessly bears the ID of the DRB.
The method according to any one of claims 1-7, wherein the sending the second data packet to the first terminal device and the second terminal device comprises:

The second data packet is sent to the first terminal device and the second terminal device in a multicast manner.
The method according to any one of claims 1-8, wherein the first network device includes a user plane function UPF, and the method further comprises:

sending third information to the second network device, where the third information is used to request the cell identity of the first terminal device and the cell identity of the second terminal device;

receiving a cell identity of the first terminal device and a cell identity of the second terminal device from the second network device;

It is determined that the cell identity of the first terminal device is the same as the cell identity of the second terminal device.
The method according to any one of claims 1-8, wherein the first network device comprises a UPF, and the method further comprises:

Send fourth information to the second network device, where the fourth information is used to indicate that the first terminal device and the second terminal device are mutual target nodes.
The method of claim 10, further comprising:

Fifth information is received from the second network device, where the fifth information is used to instruct the first network device to determine that the cell of the first terminal device is the same as the cell of the second terminal device.
The method of claim 11, wherein the fifth information includes at least one of the following information:

the identifier of the first terminal device; or,

the identifier of the second terminal device; or,

PDU session information of the first terminal device; or,

Information about the PDU session of the second terminal device.
The method according to any one of claims 10-12, wherein the fourth information includes identification information of the first terminal device and identification information of the second terminal device.
A communication method, characterized in that, applied to a first terminal device, comprising:

sending a first data packet, where the first data packet includes first indication information and first data,

receiving a third data packet from the first network device, the third data packet including the first indication information and third data,

According to the first indication information, second data is obtained, wherein the third data, the second data and the first data have an exclusive OR relationship.
The method of claim 14, wherein the first data packet further comprises:

third indication information, indicating that the first terminal device and the second terminal device are mutual target nodes; and/or,

Fourth indication information, where the fourth indication information is used to indicate that the first data has not undergone XOR processing.
The method of claim 14 or 15, wherein the third data packet further comprises:

third indication information, indicating that the first terminal device and the second terminal device are mutually target nodes, and the second data corresponds to the second terminal device; and/or,

Fifth indication information, where the fifth indication information is used to indicate that the third data is subjected to XOR processing.
The method according to claim 15 or 16, wherein the third indication information comprises an address pair consisting of the address of the first terminal device and the address of the second terminal device.
The method of any one of claims 14-17, further comprising:

The specific protocol layer of the first terminal device stores the first indication information and the first data;

The first terminal device obtains the second data according to the third data and the first data, including:

The specific protocol layer of the first terminal device obtains the second data according to the third data and the first data;

and / or;

The specific protocol layer of the first terminal device determines that the third data packet includes the first indication information;

The first terminal device obtains the second data according to the third data and the first data, including:

The specific protocol layer of the first terminal device obtains the second data according to the third data and the first data.
The method of claim 18, wherein the specific protocol layer comprises an application APP layer or an XOR layer, and the XOR layer is located between the PDCP layer and the APP layer.
The method of any one of claims 14-19, further comprising:

Send first information to the first network device, where the first information includes at least one of the following information:

the cell identifier of the first terminal device; or,

the target address of the service to which the first data belongs; or,

The source address of the service to which the first data belongs.
The method of any one of claims 14-20, further comprising:

receiving second information from the first network device or the second network device, the second network device is connected to the first network device;

The second information includes at least one of the following information:

third indication information, where the third indication information is used to indicate that the first terminal device and the second terminal device are mutually target nodes, and the third data corresponds to the second terminal device; or,

information used to indicate that the second data is obtained according to the third data and the first data; or,

a multicast service identifier, where the multicast service identifier is used for receiving the second data packet; or,

the target address of the multicast service, where the target address of the multicast service is the target address of the second data packet; or,

information used to indicate the sequence between the first terminal device and the second terminal device, where the sequence is used to determine the position of the first indication information in the third data packet; or,

the PDU session ID of the third data packet; or,

the ID of the QoS flow of the third data packet; or,

The ID of the DRB of the third data packet.
The method of any one of claims 14-21, wherein the first network device comprises a server or a UPF.
A communication device, characterized in that it includes:

memory for storing instructions;

A processor for recalling and executing the instructions from the memory to cause the communication device to perform the method of any one of claims 1-13.
A communication device, characterized in that it includes:

memory for storing instructions;

A processor for recalling and executing the instructions from the memory to cause the communication device to perform the method of any of claims 14-22.
A communication system, characterized by comprising the communication device as claimed in claim 23 and claim 24.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores instructions, and when the instructions are invoked and executed on a computer, the computer is made to execute any one of claims 1-22. method described in item.
A computer program product, characterized in that, when the computer program product is run on a computer, the computer is caused to perform the method according to any one of claims 1-22.
A circuit, characterized in that the circuit is coupled to a memory, and the circuit is configured to read and execute a program stored in the memory to perform the method of any one of claims 1-22.