WO2023141909A1

WO2023141909A1 - Wireless communication method, remote ue, and network element

Info

Publication number: WO2023141909A1
Application number: PCT/CN2022/074447
Authority: WO
Inventors: 杨皓睿; 卢飞
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2023-08-03

Abstract

Provided in the embodiments of the present application are a wireless communication method, a remote UE, and a network element. The method comprises: sending first information to a core network element, wherein the first information comprises first indication information, and the first indication information is used for indicating that a packet data unit (PDU) session is used for the transmission of a plurality of paths; and receiving second information, which is sent by the core network element, wherein the second information is used for determining at least one path which is used by the PDU session, and the plurality of paths comprise the at least one path. By means of the method provided in the present application, a remote UE realizes data transmission on the basis of taking a plurality of paths into consideration, such that data transmission efficiency and transmission performance can be improved.

Description

Wireless communication method, remote UE and network element

technical field

The embodiments of the present application relate to the communication field, and more specifically, to a wireless communication method, a remote UE, and a network element.

Background technique

With the continuous development of fifth-generation mobile communication technology (5-Generation, 5G) applications, Network Controlled Interactive Services (NCIS) business as a new business form has been introduced into the standard for related standardized business. NCIS services are mainly aimed at applications such as augmented reality (AR)/virtual reality (VR), games, etc., and have high requirements on service quality such as speed, delay, packet loss rate, and high-speed codec. For example: For VR games, the rate needs to reach 10Gbps, and the packet loss rate should not exceed 10E-4. The session established for the NCIS service is an NCIS session, and UEs in the same NCIS session can be considered to form an NCIS group, such as forming a team in a game.

In the 17th release (R17) of the 3rd Generation Partnership Project (3GPP), the 5G Proximity-based Services (Prose) topic can be used to design solutions for short-range business communications. ProSe includes NCIS. An important scenario of Prose is the scenario of UE-to-network (U2N) relay. The U2N relay uses a relay UE to relay data for a remote UE, so that the remote UE can communicate with the network, that is, data transmission is performed through an indirect path. In actual communication, the remote UE can use the non-direct path for data transmission in a manner indicated by the network device. However, there is no related solution in the art that combines the direct path and the non-direct path for service data transmission.

Contents of the invention

Embodiments of the present application provide a wireless communication method, a remote UE, and a network element, so that the remote UE implements data transmission on the basis of considering multiple paths, and can improve data transmission efficiency and transmission performance.

In a first aspect, the present application provides a wireless communication method, including:

Sending first information to a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

receiving second information sent by a network element of the core network, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

In a second aspect, the present application provides a wireless communication method, including:

receiving first information sent by the remote user equipment UE, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

Sending second information to the remote UE, where the second information is used to determine at least one path used by the PDU session, where the multiple paths include the at least one path.

In a third aspect, the present application provides a wireless communication method, including:

receiving first information sent by a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

Sending second information to the core network element, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

In a fourth aspect, the present application provides a remote UE, configured to execute the method in the above first aspect or various implementation manners thereof. Specifically, the remote UE includes a functional module for executing the method in the above first aspect or each implementation manner thereof.

In an implementation manner, the remote UE may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the remote UE may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the remote UE is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a fifth aspect, the present application provides a network element of a core network, configured to execute the method in the above-mentioned second aspect or various implementation manners thereof. Specifically, the network element of the core network includes a functional module for executing the method in the above second aspect or each implementation manner thereof.

In an implementation manner, the core network element may include a processing unit, where the processing unit is configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the core network element may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the network element of the core network is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a sixth aspect, the present application provides a PCF, configured to execute the method in the above third aspect or various implementations thereof. Specifically, the PCF includes a functional module for executing the method in the above third aspect or its various implementation manners.

In an implementation manner, the PCF may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the PCF may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the PCF is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a seventh aspect, the present application provides a remote UE, including a transceiver and a memory. The memory is used to store a computer program, and the transceiver is used to call and run the computer program stored in the memory, so as to execute the method in the above first aspect or its various implementations.

In an implementation manner, the remote UE further includes one or more processors, and one or more memories.

In an implementation manner, the memory may be integrated with the processor, or the memory may be separated from the processor.

In an eighth aspect, the present application provides a core network element, including a transceiver and a memory. The memory is used to store a computer program, and the transceiver is used to call and run the computer program stored in the memory, so as to execute the method in the above second aspect or its various implementations.

In an implementation manner, the core network element further includes one or more processors, and one or more memories.

In a ninth aspect, the present application provides a PCF, including a transceiver and a memory. The memory is used to store a computer program, and the transceiver is used to call and run the computer program stored in the memory, so as to execute the method in the above third aspect or its various implementations.

In an implementation manner, the PCF further includes one or more processors, and one or more memories.

In a tenth aspect, the present application provides a chip configured to implement any one of the foregoing first to third aspects or methods in each implementation manner thereof. Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first to third aspects or various implementations thereof method in .

In an eleventh aspect, the present application provides a computer-readable storage medium for storing a computer program, and the computer program enables the computer to execute any one of the above-mentioned first to third aspects or the various implementations thereof. method.

In a twelfth aspect, the present application provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the first to third aspects above or the method in each implementation manner.

In a thirteenth aspect, the present application provides a computer program, which, when run on a computer, causes the computer to execute any one of the above first to third aspects or the method in each implementation manner.

Based on the above technical solution, the present application sends the first information including the first indication information to the network element of the core network, and designs the first indication information to indicate that the PDU session is used for the transmission of multiple paths, so that the core The network element determines that the PDU session is a PDU expected to be used for multi-path transmission. In addition, by introducing the second information, the remote UE can determine at least one path actually used by the PDU session. Data transmission is realized on the basis of considering multiple paths, thereby improving data transmission efficiency and transmission performance.

Description of drawings

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

FIG. 2 is an example of a system architecture in which a remote terminal is connected to a 5G network through a relay terminal provided in an embodiment of the present application.

Fig. 3 is a schematic diagram of a data transmission method provided by an embodiment of the present application.

FIG. 4 to FIG. 8 are still another schematic flowchart of the wireless communication method provided by the embodiment of the present application.

FIG. 9 is a schematic block diagram of a remote UE provided by an embodiment of the present application.

Fig. 10 is a schematic block diagram of a core network element provided by an embodiment of the present application.

Fig. 11 is a schematic block diagram of a PCF provided by an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 13 is a schematic block diagram of a chip provided by an embodiment of the present application.

Detailed ways

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

The embodiments of the present application can be applied to various communication systems, for example including but not limited to: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband code division multiple Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum (NR-U) system, Universal Mobile Telecommunication System (Universal Mobile Telecommunication System, UMTS), Wireless Local Area Networks (Wireless Local Area Networks, WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next generation communication system or others communication systems, etc.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiment of this application can also be applied to these communications system.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.

The embodiment of the present application does not limit the applied frequency spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

FIG. 1 exemplarily shows a schematic diagram of a communication system 100 applied in this application.

As shown in Figure 1, the communication system 100 mainly includes a terminal equipment (User Equipment, UE) 101, an access network (Access Network, AN) equipment 102, and an access and mobility management function (Access and Mobility Management Function, AMF) Entity 103, session management function (Session Management Function, SMF) entity 104, user plane function (User Plane Function, UPF) entity 105, policy control function (Policy Control function, PCF) entity 106, unified data management (Unified Data Management, UDM) entity 107, data network (Data Network, DN) 108, application function (Application Function, AF) entity 109, authentication server function (Authentication Server Function, AUSF) entity 110, network slice selection function (Network Slice Selection Function, NSSF) entity 111.

Specifically, in the communication system 100, the UE 101 performs access layer connection with the AN device 102 through the Uu interface to exchange access layer messages and wireless data transmission, and the UE 101 performs non-access layer (non-access layer) with the AMF entity 103 through the N1 interface Non-Access Stratum, NAS) connection, to exchange NAS message; AN device 102 is connected with AMF entity 103 through N2 interface, and AN device 102 is connected with UPF entity 105 through N3 interface; Multiple UPF entities 105 are connected through N9 interface , UPF entity 105 is connected with DN 108 by N6 interface, meanwhile, UPF entity 105 is connected with SMF entity 104 by N4 interface; SMF entity 104 is connected with PCF entity 106 by N7 interface, SMF entity 104 is connected with UDM entity 107 by N10 interface, The SMF entity 104 controls the UPF entity 105 through the N4 interface. At the same time, the SMF entity 104 is connected to the AMF entity 103 through the N11 interface; multiple AMF entities 103 are connected through the N14 interface, and the AMF entity 103 is connected to the UDM entity 107 through the N8 interface. The entity 103 is connected to the AUSF entity 110 through the N12 interface, the AMF entity 103 is connected to the NSSF entity 111 through the N22 interface, and at the same time, the AMF entity 103 is connected to the PCF entity 106 through the N15 interface; the PCF entity 106 is connected to the AF entity 109 through the N5 interface; the AUSF The entity 110 is connected to the UDM entity 107 through the N13 interface.

In the communication system 100, the UDM entity 107 is a subscription database in the core network, which stores subscription data of users in the 5G network. The AMF entity 103 is the mobility management function in the core network, and the SMF entity 104 is the session management function in the core network. In addition to performing mobility management on the UE 101, the AMF entity 103 is also responsible for sending session management related messages to the UE 101 Forwarding between SMF entity 104 and SMF entity 104. The PCF entity 106 is a policy management function in the core network, and is responsible for formulating policies related to mobility management, session management, and charging of the UE 101. The UPF entity 105 is the user plane function in the core network, and performs data transmission with the external data network through the N6 interface, and performs data transmission with the AN device 102 through the N3 interface. After the UE 101 accesses the 5G network through the Uu port, a protocol data unit (Protocol Data Unit, PDU) session data connection between the UE 101 and the UPF entity 105 is established under the control of the SMF entity 104, so as to perform data transmission. The AMF entity 103 and the SMF entity 104 respectively obtain user subscription data from the UDM entity 107 through the N8 and N10 interfaces, and obtain policy data from the PCF entity 106 through the N15 and N7 interfaces.

In addition, there is also a Network Exposure Function (NEF) entity in the communication system 100, which is used to interface with a third-party application server and perform information transfer between the core network node and the third-party application.

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. It should be noted that the above-mentioned communication system 100 is described using the 5G communication system as an example. Of course, this application can also be applied to other 3GPP communication systems, such as 4G communication systems, or future 3GPP communication systems. limited. It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The embodiments of the present application describe various embodiments in conjunction with terminal equipment and network equipment, wherein terminal equipment may also be referred to as user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolution of the Public Land Mobile Network (PLMN) network.

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

Above-mentioned AN equipment 102 can be the equipment that is used for communicating with mobile equipment, and AN equipment 102 can be the access point (Access Point, AP) in WLAN, the base station (Base Transceiver Station, BTS) in GSM or CDMA, also can be The base station (NodeB, NB) in WCDMA can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a base station in a vehicle-mounted device, a wearable device, and an NR network ( gNB) or network equipment in the future evolved PLMN network.

In this embodiment of the present application, the network device provides services for the cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell may be a network device (for example, The cell corresponding to the base station) can belong to the macro base station or the base station corresponding to the small cell (Small cell). The small cell here can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

With the continuous development of 5G applications, the Network Controlled Interactive Services (NCIS) service, as a new service form, has been introduced into the standard for related standardized services. NCIS services are mainly aimed at applications such as AR/VR and games, and have high requirements on service quality such as speed, delay, packet loss rate, and high-speed codec. For example: For VR games, the rate needs to reach 10Gbps, and the packet loss rate should not exceed 10E-4. The session established for the NCIS service is an NCIS session, and UEs in the same NCIS session can be considered to form an NCIS group, for example, teaming up in a game.

In some embodiments, 5G proximity service (Proximity based Service, ProSe) can be used to design short-distance service communication, such as NCIS service communication. An important scenario of Proximity Service is the UE to network (U2N) relay scenario. The U2N relay is to relay and transmit data for a remote terminal through a relay terminal, so that the remote terminal can communicate with the network. That is to say, a terminal device with ProSe capability can directly communicate with another terminal device with ProSe capability through the PC5 interface. When a terminal device can connect to an external data network through a 5G network and also has ProSe capabilities, this terminal device can act as a relay terminal, and another remote terminal with ProSe capabilities can establish a direct connection with the Relay UE through the PC5 interface, and The PDU session established between the relay terminal and the 5G network interacts with the external network.

As shown in Figure 2, the remote terminal can be connected to the relay terminal through the PC5 interface, and the relay terminal can be connected to the next generation radio access network (Next Generation Radio Access Network, NG-RAN) through the Uu interface, so that it can connect to 5G The core network (5G Core Network, 5GC), 5GC can be connected to the application server (application server, AS) through the N6 interface. That is to say, a PC5 connection is established between the remote terminal and the relay terminal, and the relay terminal uses the PDU session to relay data from the remote terminal for the remote terminal. Since each PDU session has a type, such as: IPv4, IPv6, IPv4v6, Ethernet (Ethernet), unstructured (Unstructured), for a specific type of data, only the corresponding similar PDU session is used to transmit data transmission.

It should be noted that, FIG. 2 is illustrated by taking a 5G communication system as an example, and of course, it may also be applicable to other 3GPP communication systems, such as 4G communication systems, or future 3GPP communication systems, which are not limited in this application. In addition, in the embodiment of the present application, the application server (AS) in FIG. 2 may also be other terminal devices or external public security Internet. It should be noted that the relay terminal establishes a PDU session with the 5G network, and the remote terminal performs data interaction with the external network through the PDU session of the relay terminal.

In order to implement relay communication, before performing relay communication, the relay terminal and the remote terminal need to obtain necessary configuration parameters. These configuration parameters can come from the policy control function (Policy Control function, PCF) or application server, and can also be pre-configured on the terminal or in the subscriber identity module (SIM). Before transmitting data, the remote terminal needs to find a suitable relay terminal and establish a PC5 connection with it. Relay discovery (Relay discovery) may include the discovery process of model (Model) A or model B.

In the discovery process of mode A, the relay terminal actively broadcasts the relay service code (Relay service code, RSC) supported by the relay terminal, and the remote terminal does not need to feed back a response message. The RSC may be used to determine that the relay terminal can provide a relay service. In the discovery process of mode B, the remote terminal first broadcasts the RSC required by the remote terminal, and if there is a relay terminal around that can support the RSC required by the remote terminal, the relay terminal replies to the remote terminal. After the discovery process, a PC5 connection is established between the relay terminal and the remote terminal.

In the 17th release (R17) of the 3rd Generation Partnership Project (3GPP), the 5G Proximity-based Services (Prose) topic can be used to design solutions for short-range business communications. ProSe includes NCIS. An important scenario of Prose is the scenario of UE-to-network (U2N) relay. The U2N relay uses a relay UE to relay data for a remote UE, so that the remote UE can communicate with the network, that is, data transmission is performed through an indirect path.

As shown in Figure 3, when the remote UE transmits service data through the direct connection path, it can directly communicate with the network device through the Uu interface, and the network device can directly communicate with the AMF and the SMF respectively. When the remote UE transmits service data through a non-direct path, it can communicate with the relay UE through the PC5 interface, and then communicate with the network device through the relay UE, and the network device can communicate with the relay network device, thereby realizing For communication with AMF and SMF, network devices can communicate directly with AMF and SMF respectively.

In actual communication, the remote UE can use the non-direct path for data transmission in a manner indicated by the network device. However, there is no related solution in the art that combines the direct path and the non-direct path for service data transmission. In view of this, the present application provides a wireless communication method, a remote UE, and a network element, so that the remote UE implements data transmission on the basis of considering multiple paths, and can improve data transmission efficiency and transmission performance.

FIG. 4 is a schematic flowchart of a wireless communication method 200 provided by an embodiment of the present application. The wireless communication method 200 may be performed by a remote UE. For example, the remote terminal shown in FIG. 2 .

As shown in FIG. 4, the method 200 may include:

S210, the remote UE sends first information to a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that a packet data unit (Packet Data Unit, PDU) session is used for multiple transmission of paths;

S220. The remote UE receives second information sent by the network element of the core network, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

In this embodiment, by sending the first information including the first indication information to the network element of the core network, and designing the first indication information to indicate that the PDU session is used for transmission of multiple paths, the core network can The unit determines that the PDU session is a PDU expected to be used for multi-path transmission. In addition, by introducing the second information, the remote UE can determine at least one path actually used by the PDU session, which can enable the remote UE to consider multiple Data transmission is realized on the basis of multiple paths, which can improve data transmission efficiency and transmission performance.

Exemplarily, the multiple paths include direct paths and non-direct paths. Wherein, the direct path refers to a communication path through which the remote UE is connected to the network device through a Uu interface, and the non-direct path refers to a path through which the remote UE is connected to the network device through a relay UE.

It should be noted that the PDU session is a session expected to be used when the remote UE uses a direct path for transmission. The PUD session may be a session requested by the remote UE to be established, or a session already established by the remote UE. In this application, the PDU session is used for the transmission of multiple paths, which can be understood as: the remote UE expects the PDU session to be used in combination with other paths when using a direct path for transmission; the PDU session uses at least A path may be understood as: the path actually used when the remote UE uses the direct path for transmission.

In some embodiments, the public land mobile network (Public Land Mobile Network, PLMN) where the remote UE is located is different from the PLMN where the relay UE of the remote UE is located, and the relay UE needs to be relayed When the traffic is charged separately or it is necessary to determine whether the PLMN where the relay UE is located allows the indirect path to be used for multi-path transmission, the first information further includes the identifier of the PLMN where the relay UE is located.

Of course, in other alternative embodiments, the PLMN where the remote UE is located is the same as the PLMN where the relay UE of the remote UE is located, and there is no need to separately charge or charge the traffic relayed by the relay UE. When it is not necessary to judge whether the PLMN where the relay UE is located allows the indirect path to be used for multi-path transmission, the first information may not include the identifier of the PLMN where the relay UE is located.

In some embodiments, the second information includes second indication information, and the second indication information is used to indicate that the at least one path is a direct path among the plurality of paths, or the second indication information used to indicate that the at least one path is the plurality of paths.

Exemplarily, when the value of the second indication information is a first value, it indicates that the at least one path is the direct path, and when the value of the second indication information is a second value, it indicates that the at least one path is the direct path. The path is the plurality of paths. For example, the first value is 0 and the second value is 1, and for example, the first value is 1 and the second value is 0.

Exemplarily, the multiple paths include a direct path and a non-direct path, and the second indication information is used to indicate that the at least one path is the direct path, or the second indication information is used to indicate The at least one path is the direct path and the indirect path.

In some embodiments, the second information includes transmission rules for transmission using the plurality of paths.

Exemplarily, the transmission rule may be used to define information associated with multiple paths and/or information associated with data transmitted on the multiple paths when the remote UE uses multiple paths for transmission. Optionally, the information associated with the multiple paths may be attribute information of the multiple paths, such as priority and other information. Optionally, the information associated with the data transmitted on the multiple paths may include information such as data volume and/or transmission mode transmitted on the multiple paths.

In some embodiments, the transmission rule includes at least one of the following information:

the proportion of data respectively transmitted on each of the plurality of paths;

a priority for each of the plurality of paths;

Information indicating whether to perform repeated transmission on the plurality of paths.

Exemplarily, the plurality of paths include a direct path and a non-direct path, and the transmission rule may include at least one of the following information:

The proportion of data transmitted on the direct connection path;

The proportion of data transmitted on the non-direct path;

the priority of the direct connection path;

The priority of the indirect path.

Information for indicating whether to perform repeated transmission on the direct path and the non-direct path.

Exemplarily, the proportion of data transmitted on the direct path may refer to the proportion of the amount of data transmitted on the direct path to the total amount of data, and the proportion of data transmitted on the non-direct path may refer to the The ratio of the amount of data transmitted on the connection path to the total amount of data. For example, direct links are 80% and non-direct links are 20%. In addition, the priority of the direct path may be higher or lower than the priority of the non-direct path, and may also be equal to the priority of the non-direct path; the remote UE needs to preferentially use the path with high priority When the path with high priority is unavailable, another path is used for transmission. In addition, performing repeated transmission on the direct path and the non-direct path may be understood as: the remote UE repeatedly transmits the data transmitted on the non-direct path on the direct path, or The remote UE repeatedly transmits the data transmitted on the direct path on the non-direct path.

In some embodiments, when the second information includes the transmission rule, the at least one path is the plurality of paths.

Exemplarily, when the second information includes the transmission rule, the remote UE defaults the at least one path as the plurality of paths. That is to say, the second information may not include the second indication information but include the transmission rule, and in this case, the remote UE defaults the at least one path as the multiple paths.

In some embodiments, the method 200 may also include:

The service corresponding to the first traffic descriptor (Traffic descriptor, TD) is transmitted by using the multiple paths based on the transmission rule.

Exemplarily, the first TD is a TD matching the PDU session.

Exemplarily, when the remote UE has a session matching the first TD, the PDU session is a matching session. When the remote UE does not have a session matching the first TD, the PDU session is a session established based on a routing selection descriptor (Route selection descriptor, RSD) corresponding to the first TD.

Exemplarily, the first TD is used to identify a service, for example, the first TD may be an identifier (APP ID) of a first application program.

In some embodiments, when the network element of the core network is an SMF, the first information is carried in the PDU session establishment request, and the second information is carried in the PDU session establishment request response.

In some embodiments, when the core network element is an AMF, the first information is carried in an uplink Non-Access Stratum (Non-Access Stratum, NAS) transmission message, and the second information is carried in a downlink NAS transmission message inside the message.

In some embodiments, the uplink NAS transmission message further includes a PDU session establishment request, and the downlink NAS transmission message further includes a PDU session establishment request response.

It should be noted that when the downlink NAS transmission message includes both the PDU session establishment request response and the second information, the second information may be carried in the PDU session establishment request response, or may be located in the PDU session establishment request response. Except for establishing a request response, this application does not specifically limit it.

In some embodiments, the method 200 may also include:

The remote UE receives the user policy sent by the PCF policy control network element; wherein the user policy includes third indication information, and the third indication is used to instruct the service corresponding to the first TD to use the multiple paths for transmission.

Exemplarily, the user policy may be a user equipment routing selection policy (UE Route Selection Policy, URSP), or may be a ProSe policy (ProSeP).

Exemplarily, the ProSeP may include a mapping list of a relay service code (Relay service code, RSC) and the third indication information. Optionally, both the RSC and the first TD may be used to indicate a certain service.

Exemplarily, the URSP may include a mapping list of a traffic descriptor (Traffic descriptor, TD) and a route selection descriptor (Route selection descriptor, RSD). Among them, TD is used to identify the business, for example, TD can be APP ID; RSD can include at least one of the following information or components: session and service continuity (Session and Service Continuity, SSC) mode type (mode type), single network slice Selection of auxiliary information (Single-Network Slice Selection Assistance Information, S-NSSAI) type, data network name (Data Network Name, DNN) type, packet data unit (Packet Data Unit, PDU) session type, preferred access type (Preferred access type), multi-access preference type (Multi-access preference type), non-seamless non-3GPP offload indication type (Non-seamless non-3GPP offload indication type), location condition type (Location criteria type), time window type ( Time window type), the fifth-generation mobile communication technology neighbor service layer 3 UE-to-network relay offload indication type (5G ProSe Layer-3 UE-to-network relay offload indication type). A TD can correspond to one or more RSDs.

Exemplarily, for any TD, the user policy may include a mapping list between the TD and the information used to indicate that the corresponding service is transmitted using the multiple paths. In other words, when there is information indicating that the corresponding service is transmitted using the multiple paths, it indicates that the corresponding service needs to be transmitted using the multiple paths. Optionally, the information used to indicate that the corresponding service is transmitted using the multiple paths may also be referred to as multi-path indication (Multi-path indication) information.

In some embodiments, the user policy further includes a correspondence between the first TD and at least one routing selection descriptor (Route selection descriptor, RSD), and the PDU session type included in the at least one RSD is Internet Protocol IP.

Exemplarily, the PCF may consider the PDU session type when deciding that the service corresponding to the TD is transmitted using multipath. For example, if the PDU session type is IP, then send the information for indicating that the corresponding service is transmitted using the multiple paths; otherwise, not send the information for indicating that the corresponding service is transmitted using the multiple paths. Correspondingly, the remote UE may determine whether the PDU session is used for transmission of multiple paths according to the information indicating that the corresponding service is transmitted using the multiple paths. For example, when the PDU session type included in the first RSD of the at least one RSD is IP, the user policy includes the third indication information.

In some embodiments, the RSD where the third indication information is located and the UE-to-network relay offload indication type of the fifth generation mobile communication technology neighbor service layer 3 (5G ProSe Layer-3 UE-to-network relay offload indication type) in the same or different RSD.

Exemplarily, for any TD, when its corresponding RSD is a plurality of RSDs, and the plurality of RSDs include the UE-to-network relay offload indication type of the fifth generation mobile communication technology neighbor service layer 3 (5G ProSe Layer -3 UE-to-network relay offload indication type), the information used to indicate that the corresponding service uses the multiple paths for transmission and the UE-to-network relay offload indication of the fifth-generation mobile communication technology neighbor service layer 3 The type (5G ProSe Layer-3 UE-to-network relay offload indication type) can be carried in the same RSD or in different RSDs.

Exemplarily, for any TD, when its corresponding RSD is one RSD, and the one RSD includes the UE-to-network relay offload indication type of the fifth generation mobile communication technology neighbor service layer 3 (5G ProSe Layer-3 UE-to-network relay offload indication type), the information used to indicate that the corresponding service is transmitted using the multiple paths and the offload indication type of UE-to-network relay in the fifth-generation mobile communication technology neighbor service layer 3 ( 5G ProSe Layer-3 UE-to-network relay offload indication type) may all be carried in the one RSD.

The solution provided by the present application will be described below in combination with specific embodiments.

Example 1:

In this embodiment, the remote UE sends first information to the SMF, the first information includes first indication information, and the first indication information is used to indicate that the PDU session is used for transmission of multiple paths; the remote UE receives the The second information sent by the SMF, the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path. Further, the first information is carried in the PDU session establishment request, and the second information is carried in the PDU session establishment request response.

FIG. 5 is a schematic flowchart of a wireless communication method 300 provided by an embodiment of the present application.

As shown in FIG. 5, the method 300 may include:

S310, the remote UE receives the user policy sent by the PCF.

Exemplarily, the user policy may be a user equipment routing selection policy (UE Route Selection Policy, URSP).

S320, the remote UE establishes a connection with the relay UE.

Exemplarily, the remote UE finds a relay UE that can support the service to be transmitted, and establishes a connection with it. The remote UE obtains the public land mobile network (Public Land Mobile Network, PLMN) ID of the relay UE. The relay UE also establishes the PDU session corresponding to the service. It should be noted that S320 may occur after S380, that is, S320 may occur after the remote UE establishes the PDU session. That is to say, this embodiment does not limit the sequence of session establishment between the PC5 link and the Uu interface.

S330. The remote UE sends a PDU session establishment request to the SMF, including first indication information.

Exemplarily, the remote UE determines the RSD corresponding to the first TD according to the policy information received at S310, and initiates a process of establishing a PDU session based on the RSD corresponding to the first TD through the direct link. Wherein, the remote UE sends a PDU session establishment request (that is, first information) to the SMF, and the PDU session establishment request includes first indication information, and the first indication information is used to indicate a packet data unit (Packet Data Unit, PDU) Sessions are used for transport across multiple paths. Optionally, the remote UE and the relay UE are under different PLMNs, and there is no need to separately charge the traffic relayed by the relay UE or to determine whether the PLMN where the relay UE is located allows the indirect path to which it belongs When used for multipath transmission, the PDU session establishment request may also include the PLMN ID of the relay UE.

S340. The SMF sends first indication information to the PCF.

Exemplarily, the SMF determines according to the first indication information that the PDU session requested by the remote UE to be established is used to transmit service data together with other paths (such as non-direct paths). Further, the SMF sends the received first indication information (optionally, also including the PLMN ID of the relay UE) to the PCF. For example, the SMF invokes a pcf service or a pcf interface based on the first indication information (optionally, also includes the PLMN ID of the relay UE), or in other words, the SMF transfers the first indication information (optionally, also includes the The UE's PLMN ID) is carried in the pcf signaling and sent to the PCF.

S350. The PCF judges whether the PDU session can use multipath transmission according to the PLMN ID of the relay UE, and determines the second indication information and/or the transmission rule when multipath transmission can be used.

Exemplarily, the PCF determines whether to allow the remote UE to use multipath according to the identifier of the PLMN where the relay UE is located, the subscription information of the remote UE, and the local configuration information of the remote UE (for example, whether the service to be transmitted can use multipath). The UE implements the transmission of multiple paths by using the PDU session. For example, the PCF determines whether to allow the remote UE to use the PDU session to implement transmission of multiple paths according to the protocol of the PLMN of the relay UE and the protocol of the PLMN of the remote UE. Further, when the PCF determines that multipath transmission can be used, it may determine the second indication information and/or the transmission rule.

The proportion of data transmitted on the direct connection path;

The proportion of data transmitted on the non-direct path;

the priority of the direct connection path;

The priority of the indirect path.

S360. The PCF sends the second indication information and/or the transmission rule to the SMF.

Exemplarily, the SMF obtains the second indication information and/or the transmission rule by calling the pcf service or the pcf interface, or in other words, the PCF carries the second indication information and/or the transmission rule in the pcf Send it to the SMF in the signaling.

S370. The SMF selects a supported UPF based on the second indication information and/or the PLMN ID of the relay UE.

S380. The SMF sends a PDU session establishment response to the remote UE, including the second indication information and/or the transmission rule.

Exemplarily, after the SMF acquires the second indication information and/or the transmission rule, it may send a PDU session establishment response (that is, second information) to the remote UE, which includes the second indication information and/or the transmission rule. the transmission rules described above. Further, the SMF may also allocate a PDU address (address) for the established PDU session, such as an IPv4 address, and send the PDU address to the remote UE in the PDU session establishment response. Correspondingly, after the remote UE receives the PDU session establishment response, if the PDU session establishment response includes transmission rules, the transmission rules can be sent to the upper layer, and the upper layer can decide how to transmit data on multiple paths according to the transmission rules . In addition, the remote UE may also send the PDU address included in the PDU session establishment response to the upper layer. If the multiple paths include a direct path and a non-direct path, the upper layer will have two PDU addresses, one corresponding to the address of the PC5 connection of the non-direct path, and one corresponding to the address of the PDU session of the direct path. The upper layer can use protocols such as MPTCP to use two PDU addresses to realize dual-link simultaneous data transmission.

Example 2:

In this embodiment, the remote UE sends first information to the AMF, where the first information includes first indication information, and the first indication information is used to indicate that the PDU session is used for transmission of multiple paths; the remote UE receives the The second information sent by the AMF, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path. Further, the first information is carried in an uplink non-access stratum NAS transmission message, and the second information is carried in a downlink NAS transmission message.

FIG. 6 is a schematic flowchart of a wireless communication method 400 provided by an embodiment of the present application.

As shown in FIG. 6, the method 400 may include:

S410, the remote UE receives the user policy sent by the PCF.

S420, the remote UE establishes a connection with the relay UE.

Exemplarily, the remote UE finds a relay UE that can support the service to be transmitted, and establishes a connection with it. The remote UE obtains the public land mobile network (Public Land Mobile Network, PLMN) ID of the relay UE. The relay UE also establishes the PDU session corresponding to the service. It should be noted that S420 may occur after S492, that is, S420 may occur after the remote UE establishes the PDU session. That is to say, this embodiment does not limit the sequence of session establishment between the PC5 link and the Uu interface.

S430, the remote UE sends an uplink NAS transmission message to the AMF, including a PDU session establishment request and first indication information.

Exemplarily, the remote UE determines the RSD corresponding to the first TD according to the policy information received at S310, and initiates a process of establishing a PDU session based on the RSD corresponding to the first TD through the direct link. Wherein, the PDU session establishment request sent by the remote UE to the AMF may be carried in the uplink NAS transmission message (that is, the first information). In addition, the uplink NAS transmission message may also include first indication information, and the first indication information Used to indicate that a packet data unit (Packet Data Unit, PDU) session is used for transmission of multiple paths. Optionally, the remote UE and the relay UE are under different PLMNs, and there is no need to separately charge the traffic relayed by the relay UE or to determine whether the PLMN where the relay UE is located allows the indirect path to which it belongs When used for multipath transmission, the uplink NAS transmission message may also include the PLMN ID of the relay UE.

S440, the AMF selects a supported SMF according to the first indication information and/or the PLMN ID of the relay UE.

Exemplarily, the AMF may select a supported SMF according to the first indication information and the PLMN ID where the relay UE is located. If the PLMN where the relay UE resides is different from the PLMN where the remote UE resides, the AMF may select two SMFs, one of which corresponds to the PLMN where the relay UE resides, and the other corresponds to the PLMN where the remote UE resides.

S450. The AMF sends a PDU session establishment request and first indication information to the SMF.

Exemplarily, the AMF sends the received first indication information and the PDU session establishment request (optionally including the PLMN ID of the relay UE) to the SMF corresponding to the PLMN where the remote UE is located. For example, the AMF invokes the smf service or the smf interface based on the first indication information and the PDU session establishment request (optionally, also including the PLMN ID of the relay UE), or in other words, the AMF combines the first indication information and The PDU session establishment request (optionally, also includes the PLMN ID of the relay UE) is carried in the SMF signaling and sent to the SMF. Optionally, if the PLMN where the relay UE is located is different from the PLMN where the remote UE is located, and the AMF selects two SMFs, then the SMF corresponding to the PLMN where the remote UE is located sends an SMF to the PLMN corresponding to the PLMN where the relay UE is located The SMF sends the first indication information, the PDU session establishment request, the PLMN ID of the relay UE, and the identifier of the SMF corresponding to the PLMN where the relay UE is located (the SMF ID of the relay PLMN).

S460. The SMF sends first indication information to the PCF.

S470, the PCF judges whether the PDU session can use multipath transmission according to the PLMN ID of the relay UE, and determines the transmission rule when multipath transmission can be used.

The proportion of data transmitted on the direct connection path;

The proportion of data transmitted on the non-direct path;

the priority of the direct connection path;

The priority of the indirect path.

S480. The PCF sends the second indication information and/or the transmission rule to the SMF.

S490, the SMF selects a supported UPF based on the second indication information and/or the PLMN ID of the relay UE.

S491. The SMF sends a PDU session establishment response to the AMF, where the PDU session establishment response includes second indication information and/or a transmission rule.

Exemplarily, after acquiring the second indication information and/or the transmission rule, the SMF may send a PDU session establishment response to the AMF, where the PDU session establishment response includes the second indication information and/or the transmission rule. Further, the AMF may also assign a PDU address (address), such as an IPv4 address, to the established PDU session, and send the PDU address to the remote UE in the PDU session establishment response. For example, the AMF obtains the PDU session establishment response by invoking the smf service or smf interface, or in other words, the SMF carries the PDU session establishment response in smf signaling and sends it to the AMF.

S492. The AMF sends a downlink NAS transmission message to the remote UE, where the downlink NAS transmission message includes a PDU session establishment response, and the PDU session establishment response includes second indication information and/or a transmission rule.

Exemplarily, after obtaining the PDU session establishment response, the AMF may send a downlink NAS transmission message (that is, second information) to the remote UE, which includes the PDU session establishment response. Correspondingly, after the remote UE receives the downlink NAS transmission message, if the PDU session establishment response in the downlink NAS transmission message includes a transmission rule, the transmission rule can be sent to the upper layer, and the upper layer can determine data transmission according to the transmission rule . In addition, the remote UE may also send the PDU address included in the PDU session establishment response to the upper layer. If the multiple paths include a direct path and a non-direct path, the upper layer will have two PDU addresses, one corresponding to the address of the PC5 connection of the non-direct path, and one corresponding to the address of the PDU session of the direct path. The upper layer can use protocols such as MPTCP to use two PDU addresses to realize dual-link simultaneous data transmission.

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

It should also be understood that, in various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink" and "uplink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is from the station to the user equipment in the cell For the first direction, "uplink" is used to indicate that the signal or data transmission direction is the second direction from the user equipment in the cell to the station, for example, "downlink signal" indicates that the signal transmission direction is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The wireless communication method provided according to the embodiment of the present application is described in detail from the perspective of the remote UE in conjunction with FIGS. The wireless communication method provided by the embodiment.

FIG. 7 is a schematic flowchart of a wireless communication method 500 provided by an embodiment of the present application. The method 500 can be executed by a network element of the core network, such as the AMF 103 or the SMF 104 shown in FIG. 1 .

As shown in FIG. 7, the method 500 may include:

S510. Receive first information sent by the remote user equipment UE, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

S520. Send second information to the remote UE, where the second information is used to determine at least one path used by the PDU session, where the multiple paths include the at least one path.

In some embodiments, the first information further includes an identifier of the public land mobile communication network PLMN where the relay UE of the remote UE is located.

a priority for each of the plurality of paths;

In some embodiments, when the core network element is a session management network element SMF, the first information is carried in a PDU session establishment request, and the second information is carried in a PDU session establishment request response.

In some embodiments, the method 500 may also include:

sending the first information to the policy management network element PCF;

Receive the second information sent by the PCF.

In some embodiments, the method 500 may also include:

Determine the UPF of the user plane network element of the remote UE based on the second information.

In some embodiments, when the network element of the core network is an access and mobility management network element AMF, the first information is carried in an uplink non-access stratum NAS transmission message, and the second information is carried in a downlink NAS transmission message. inside the message.

In some embodiments, the method 500 may also include:

Send the first information to the policy management network element PCF through the session management network element SMF;

The second information sent by the PCF is received through the SMF.

FIG. 8 is a schematic flowchart of a wireless communication method 600 provided by an embodiment of the present application. The method 600 may be executed by the PCF 106 as shown in FIG. 1 .

As shown in FIG. 8, the method 600 may include:

S610. Receive first information sent by a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that a packet data unit PDU session is used for transmission of multiple paths;

S620. Send second information to the core network element, where the second information is used to determine at least one path used by the PDU session, where the multiple paths include the at least one path.

In some embodiments, the method 600 may further include:

It is determined whether the PDU session allows use of the plurality of paths.

In some embodiments, the method 600 may further include:

determining whether the PDU session allows use of the plurality of paths based on at least one of the following information:

The identity of the PLMN where the relay UE of the remote user equipment UE is located, the subscription information of the remote UE, and the local configuration information of the remote UE.

In some embodiments, the first information further includes an identifier of the public land mobile communication network PLMN where the relay UE of the remote user equipment UE is located.

a priority for each of the plurality of paths;

In some embodiments, the S610 may include:

receiving the first information sent by the SMF through the session management network element SMF;

Wherein, the S620 may include:

sending the second information to the AMF through the SMF.

In some embodiments, the method 600 may further include:

Sending the user policy to the remote user equipment UE; wherein the user policy includes third indication information, and the third indication is used to instruct the service corresponding to the first traffic descriptor TD to use the multiple paths for transmission.

In some embodiments, the user policy further includes a correspondence between the first TD and at least one routing descriptor RSD, and the PDU session type included in the at least one RSD is Internet Protocol IP.

In some embodiments, the RSD where the first indication information is located is the same as or different from the RSD where the UE-to-network relay offload indication type of the fifth generation mobile communication technology neighbor service layer 3 is located.

It should be understood that for the steps in the

wireless communication method

500 or 600, reference may be made to corresponding steps in the wireless communication methods 200 to 400, and for the sake of brevity, details are not repeated here. In addition, when the first information or the second information is transmitted by invoking different interfaces or interacting between different network elements, the signaling or parameters used to carry the first information or the second information may be Different names are used, which are not specifically limited in the present application.

The method embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 8 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 9 to FIG. 13 .

FIG. 9 is a schematic block diagram of a remote UE 710 according to an embodiment of the present application.

As shown in Figure 9, the remote UE 710 may include:

The sending unit 711 is configured to send first information to a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

The receiving unit 712 is configured to receive second information sent by a network element of the core network, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

In some embodiments, the land public mobile communication network PLMN where the remote UE is located is different from the PLMN where the relay UE of the remote UE is located, and the traffic relayed by the relay UE needs to be charged separately Or when it is necessary to determine whether the PLMN where the relay UE is located allows the indirect path it belongs to to be used for multi-path transmission, the first information further includes the identifier of the PLMN where the relay UE is located.

a priority for each of the plurality of paths;

In some embodiments, the sending unit 711 is further configured to:

The service corresponding to the first traffic descriptor TD is transmitted by using the plurality of paths based on the transmission rule.

In some embodiments, the receiving unit 712 is also used for:

receiving the user policy sent by the PCF policy control network element; wherein the user policy includes third indication information, and the third indication is used to instruct the service corresponding to the first traffic descriptor TD to use the multiple paths for transmission.

In some embodiments, the RSD where the third indication information is located is the same as or different from the RSD where the UE-to-network relay offload indication type of the fifth generation mobile communication technology neighbor service layer 3 is located.

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the remote UE 710 shown in FIG. 9 may correspond to the corresponding subjects performing the methods provided in the embodiments of the present application, and the aforementioned and other operations and/or functions of each unit in the remote UE 710 are respectively for realizing For the sake of brevity, the corresponding processes in the methods provided in the embodiments of the present application will not be repeated here.

Fig. 10 is a schematic block diagram of a core network element 720 according to an embodiment of the present application.

As shown in FIG. 10, the core network element 720 may include:

The receiving unit 721 is configured to receive first information sent by the remote user equipment UE, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths ;

The sending unit 722 is configured to send second information to the remote UE, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

a priority for each of the plurality of paths;

In some embodiments, the sending unit 722 is also used to:

Send the first information to the policy management network element PCF; the receiving unit 721 is further configured to:

Receive the second information sent by the PCF.

In some embodiments, the sending unit 722 is also used to:

Send the first information to the policy management network element PCF through the session management network element SMF; the receiving unit 721 is also used for:

The second information sent by the PCF is received through the SMF.

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the core network element 720 shown in FIG. 10 may correspond to the corresponding subject in each method provided in the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the core network element 720 In order to implement the corresponding processes in the methods provided in the embodiments of the present application respectively, for the sake of brevity, details are not repeated here.

Fig. 11 is a schematic block diagram of the PCF 730 of the embodiment of the present application.

As shown in Figure 11, described PCF 730 can comprise:

The receiving unit 731 is configured to receive first information sent by a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

The sending unit 732 is configured to send second information to the network element of the core network, the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.

In some embodiments, the sending unit 732 is also configured to:

It is determined whether the PDU session allows use of the plurality of paths.

In some embodiments, the sending unit 732 is specifically configured to:

a priority for each of the plurality of paths;

In some embodiments, the receiving unit 731 is specifically configured to:

Wherein, the sending unit 732 is specifically used for:

sending the second information to the AMF through the SMF.

In some embodiments, the sending unit 732 is also configured to:

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the PCF 730 shown in FIG. 11 may correspond to the corresponding subjects in the various methods provided in the embodiments of the present application, and the aforementioned and other operations and/or functions of the various units in the PCF 730 are for realizing the implementation of the present application For the sake of brevity, the corresponding processes in each method provided by the example are not repeated here.

The above describes the communication device in the embodiment of the present application from the perspective of functional modules with reference to the accompanying drawings. It should be understood that the functional modules may be implemented in the form of hardware, may also be implemented by instructions in the form of software, and may also be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application can be completed by an integrated logic circuit of the hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as hardware The execution of the decoding processor is completed, or the combination of hardware and software modules in the decoding processor is used to complete the execution. Optionally, the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, and registers. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware.

For example, the receiving unit and the sending unit mentioned above may be realized by a transceiver.

Fig. 12 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application.

As shown in FIG. 12 , the communication device 800 may include a processor 810 .

Wherein, the processor 810 can call and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 12 , the communication device 800 may further include a memory 820 .

Wherein, the memory 820 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 810 . Wherein, the processor 810 can call and run a computer program from the memory 820, so as to implement the method in the embodiment of the present application. The memory 820 may be an independent device independent of the processor 810 , or may be integrated in the processor 810 .

As shown in FIG. 12 , the communication device 800 may further include a transceiver 830 .

Wherein, the processor 810 can control the transceiver 830 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices. Transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include antennas, and the number of antennas may be one or more.

It should be understood that various components in the communication device 800 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

It should also be understood that the communication device 800 may be a remote UE, a core network element, or a PCF in the embodiments of the present application, and the communication device 800 may implement the method performed by the remote UE or the core network element in each method of the embodiments of the present application. Or the corresponding process implemented by PCF, that is to say, the communication device 800 of the embodiment of the present application may correspond to the remote UE 710, the core network element 720 or the PCF 730 in the embodiment of the present application, and may correspond to the For the sake of brevity, the corresponding subjects in the methods provided in the embodiments are not repeated here.

In addition, the embodiment of the present application also provides a chip.

For example, the chip may be an integrated circuit chip, which has signal processing capabilities, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The chip can also be called system-on-chip, system-on-chip, system-on-chip or system-on-chip, etc. Optionally, the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

FIG. 13 is a schematic structural diagram of a chip 900 according to an embodiment of the present application.

As shown in FIG. 13 , the chip 900 includes a processor 99 .

Wherein, the processor 99 may invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 13 , the chip 900 may further include a memory 920 .

Wherein, the processor 99 can invoke and run a computer program from the memory 920, so as to implement the method in the embodiment of the present application. The memory 920 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 99 . The memory 920 may be an independent device independent of the processor 99 , or may be integrated in the processor 99 .

As shown in FIG. 13 , the chip 900 may further include an input interface 930 .

Wherein, the processor 99 can control the input interface 930 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

As shown in FIG. 13 , the chip 900 may further include an output interface 940 .

Wherein, the processor 99 can control the output interface 940 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

It should be understood that the chip 900 can be applied to the remote UE, the core network element or the PCF in the embodiment of the present application, and the chip can implement the remote UE, the core network element or the PCF in each method of the embodiment of the present application. For the sake of brevity, the corresponding processes implemented by the PCF are not repeated here. It should also be understood that various components in the chip 900 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

Processors mentioned above may include, but are not limited to:

General-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components, and so on.

The processor may be used to implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The storage mentioned above includes but is not limited to:

volatile memory and/or non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synch link DRAM, SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM).

It should be noted that the memories described herein are intended to include these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions. When the instructions are executed by a portable electronic device including a plurality of application programs, the portable electronic device can perform the wireless communication provided by the application. communication method. Optionally, the computer-readable storage medium may be applied to the remote UE, the core network element, or the PCF in the embodiments of the present application, and the computer program enables the computer to execute each method in the embodiments of the present application by the remote UE, the network element, or the PCF. For the sake of brevity, the corresponding processes implemented by the network element of the core network or the PCF will not be repeated here.

The embodiment of the present application also provides a computer program product, including a computer program. Optionally, the computer program product can be applied to the remote UE, the core network element or the PCF in the embodiments of the present application, and the computer program enables the computer to execute each method in the embodiments of the present application by the remote UE, the core network For the sake of brevity, the corresponding process implemented by the network element or PCF will not be repeated here.

The embodiment of the present application also provides a computer program. When the computer program is executed by the computer, the computer can execute the wireless communication method provided in this application. Optionally, the computer program can be applied to the remote UE, the core network element, or the PCF in the embodiments of the present application. When the computer program is run on the computer, the computer executes the remote For the sake of brevity, the corresponding processes implemented by the end UE, the core network element, or the PCF will not be repeated here.

The embodiment of the present application also provides a communication system. The communication system may include the above-mentioned remote UE, core network element or PCF to form the communication system as shown in FIG. 1 . repeat. It should be noted that the terms "system" and the like in this document may also be referred to as "network management architecture" or "network system".

It should also be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "said", "above" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. meaning.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present application. If implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

Those skilled in the art can also realize that for the convenience and brevity of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the division of units or modules or components in the above-described device embodiments is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or modules or components can be combined or integrated to another system, or some units or modules or components may be ignored, or not implemented. For another example, the units/modules/components described above as separate/display components may or may not be physically separated, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units/modules/components can be selected according to actual needs to achieve the purpose of the embodiments of the present application. Finally, it should be noted that the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms .

The above content is only the specific implementation of the embodiment of the application, but the scope of protection of the embodiment of the application is not limited thereto. Anyone familiar with the technical field can easily think of Any changes or substitutions shall fall within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be determined by the protection scope of the claims.

Claims

A wireless communication method, characterized in that the method is applicable to a remote user equipment UE, and the method includes:

Sending first information to a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

receiving second information sent by a network element of the core network, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.
The method according to claim 1, wherein the public land mobile communication network PLMN where the remote UE is located is different from the PLMN where the relay UE of the remote UE is located, and it is necessary to When the relay traffic is charged separately or it is necessary to determine whether the PLMN where the relay UE is located allows the indirect path it belongs to to be used for multi-path transmission, the first information further includes the identifier of the PLMN where the relay UE is located.
The method according to claim 1 or 2, wherein the second information includes second indication information, and the second indication information is used to indicate that the at least one path is a direct connection among the plurality of paths paths, or the second indication information is used to indicate that the at least one path is the plurality of paths.
The method according to any one of claims 1 to 3, wherein the second information includes transmission rules for transmission using the multiple paths.
The method according to claim 4, wherein the transmission rule includes at least one of the following information:

the proportion of data respectively transmitted on each of the plurality of paths;

a priority for each of the plurality of paths;

Information indicating whether to perform repeated transmission on the plurality of paths.
The method according to claim 4 or 5, wherein when the second information includes the transmission rule, the at least one path is the plurality of paths.
The method according to claim 6, further comprising:

The service corresponding to the first traffic descriptor TD is transmitted by using the plurality of paths based on the transmission rule.
The method according to any one of claims 1 to 7, wherein when the core network element is a session management network element (SMF), the first information is carried in the packet data unit (PDU) session establishment request, so The second information is carried in the PDU session establishment request response.
The method according to any one of claims 1 to 7, wherein when the core network element is an access and mobility management network element AMF, the first information is carried in the uplink non-access stratum NAS transmission In the message, the second information is carried in the downlink NAS transmission message.
The method according to claim 9, wherein the uplink NAS transmission message further includes a PDU session establishment request, and the downlink NAS transmission message further includes a PDU session establishment request response.
The method according to any one of claims 1 to 10, further comprising:

receiving the user policy sent by the PCF policy control network element; wherein the user policy includes third indication information, and the third indication is used to instruct the service corresponding to the first traffic descriptor TD to use the multiple paths for transmission.
The method according to claim 11, wherein the user policy further includes a correspondence between the first TD and at least one routing descriptor RSD, and the PDU session type included in the at least one RSD is Internet Protocol IP .
The method according to claim 11 or 12, wherein the RSD where the third indication information is located is the same as the RSD where the offload indication type of UE-to-network relay of the fifth generation mobile communication technology neighbor service layer 3 is located or different.
A wireless communication method, characterized in that the method is applicable to core network elements, and the method includes:

receiving first information sent by the remote user equipment UE, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

Sending second information to the remote UE, where the second information is used to determine at least one path used by the PDU session, where the multiple paths include the at least one path.
The method according to claim 14, wherein the first information further includes an identifier of a public land mobile communication network (PLMN) where the relay UE of the remote UE is located.
The method according to claim 14 or 15, wherein the second information includes second indication information, and the second indication information is used to indicate that the at least one path is a direct connection among the plurality of paths paths, or the second indication information is used to indicate that the at least one path is the plurality of paths.
The method according to any one of claims 14 to 16, wherein the second information includes a transmission rule for transmission using the plurality of paths.
The method according to claim 17, wherein the transmission rule includes at least one of the following information:

the proportion of data respectively transmitted on each of the plurality of paths;

a priority for each of the plurality of paths;

Information indicating whether to perform repeated transmission on the plurality of paths.
The method according to claim 17 or 18, wherein when the second information includes the transmission rule, the at least one path is the plurality of paths.
The method according to any one of claims 14 to 19, wherein when the core network element is a session management network element (SMF), the first information is carried in a packet data unit (PDU) session establishment request, so The second information is carried in the PDU session establishment request response.
The method according to claim 20, further comprising:

sending the first information to the policy management network element PCF;

Receive the second information sent by the PCF.
The method according to claim 20 or 21, wherein the method further comprises:

Determine the UPF of the user plane network element of the remote UE based on the second information.
The method according to any one of claims 14 to 19, wherein when the network element of the core network is an access and mobility management network element AMF, the first information is carried in the uplink non-access stratum NAS transmission In the message, the second information is carried in the downlink NAS transmission message.
The method according to claim 23, wherein the uplink NAS transmission message further includes a PDU session establishment request, and the downlink NAS transmission message further includes a PDU session establishment request response.
The method according to claim 23 or 24, wherein the method further comprises:

Send the first information to the policy management network element PCF through the session management network element SMF;

The second information sent by the PCF is received through the SMF.
A wireless communication method, characterized in that the method is applicable to a policy control network element PCF, and the method includes:

receiving first information sent by a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

Sending second information to the core network element, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.
The method according to claim 26, further comprising:

It is determined whether the PDU session allows use of the plurality of paths.
The method according to claim 27, wherein the determining whether the PDU session is allowed to use the multiple paths comprises:

determining whether the PDU session allows use of the plurality of paths based on at least one of the following information:

The identity of the PLMN where the relay UE of the remote user equipment UE is located, the subscription information of the remote UE, and the local configuration information of the remote UE.
The method according to any one of claims 26 to 28, wherein the first information further includes an identifier of the public land mobile communication network (PLMN) where the relay UE of the remote user equipment UE is located.
The method according to any one of claims 26 to 29, wherein the second information includes second indication information, and the second indication information is used to indicate that the at least one path is the plurality of paths The directly connected path in , or the second indication information is used to indicate that the at least one path is the plurality of paths.
The method according to any one of claims 26 to 30, wherein the second information includes a transmission rule for transmission using the plurality of paths.
The method according to claim 31, wherein the transmission rule includes at least one of the following information:

the proportion of data respectively transmitted on each of the plurality of paths;

a priority for each of the plurality of paths;

Information indicating whether to perform repeated transmission on the plurality of paths.
The method according to claim 31 or 32, wherein when the second information includes the transmission rule, the at least one path is the plurality of paths.
The method according to any one of claims 26 to 33, wherein when the core network element is a session management network element (SMF), the first information is carried in the packet data unit (PDU) session establishment request, so The second information is carried in the PDU session establishment request response.
The method according to any one of claims 26 to 33, wherein when the core network element is an access and mobility management network element (AMF), the first information is carried in the uplink non-access stratum NAS transmission In the message, the second information is carried in the downlink NAS transmission message.
The method according to claim 35, wherein the uplink NAS transmission message further includes a PDU session establishment request, and the downlink NAS transmission message further includes a PDU session establishment request response.
The method according to claim 35 or 36, wherein the receiving the first information sent by the network element of the core network comprises:

receiving the first information sent by the SMF through the session management network element SMF;

Wherein, the sending the second information to the core network element includes:

sending the second information to the AMF through the SMF.
The method according to any one of claims 26 to 37, further comprising:

Sending the user policy to the remote user equipment UE; wherein the user policy includes third indication information, and the third indication is used to instruct the service corresponding to the first traffic descriptor TD to use the multiple paths for transmission.
The method according to claim 38, wherein the user policy further includes a correspondence between the first TD and at least one routing descriptor RSD, and the PDU session type included in the at least one RSD is Internet Protocol IP .
The method according to claim 38 or 39, wherein the RSD where the first indication information is located is the same as the RSD where the offload indication type of UE-to-network relay of the fifth generation mobile communication technology neighbor service layer 3 is located or different.
A remote user equipment UE, characterized in that it includes:

A sending unit, configured to send first information to a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

A receiving unit, configured to receive second information sent by a network element of the core network, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.
A core network element, characterized in that it includes:

The receiving unit is configured to receive first information sent by the remote user equipment UE, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

A sending unit, configured to send second information to the remote UE, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.
A policy control network element PCF is characterized in that it includes:

receiving first information sent by a network element of the core network, where the first information includes first indication information, and the first indication information is used to indicate that the packet data unit PDU session is used for transmission of multiple paths;

Sending second information to the core network element, where the second information is used to determine at least one path used by the PDU session, and the multiple paths include the at least one path.
A remote user equipment UE, characterized in that it includes:

A transceiver and a memory, the memory is used to store a computer program, and the transceiver is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 13.
A core network element, characterized in that it includes:

A transceiver and a memory, the memory is used to store a computer program, and the transceiver is used to invoke and run the computer program stored in the memory, so as to execute the method according to any one of claims 14 to 25.
A policy control network element PCF is characterized in that it includes:

A transceiver and a memory, the memory is used to store a computer program, and the transceiver is used to call and run the computer program stored in the memory, so as to execute the method according to any one of claims 26 to 40.
A chip, characterized in that it comprises:

The processor is used to call and run the computer program from the memory, so that the device installed with the chip executes the method according to any one of claims 1 to 13, and the method according to any one of claims 14 to 25 or a method as claimed in any one of claims 26 to 40.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to perform the method according to any one of claims 1 to 13, any one of claims 14 to 25 A method as described or a method as claimed in any one of claims 26 to 40.
A computer program product, characterized in that it comprises computer program instructions, the computer program instructions cause a computer to execute the method according to any one of claims 1 to 13, and the method according to any one of claims 14 to 25 or a method as claimed in any one of claims 26 to 40.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 13, the method according to any one of claims 14 to 25 or the method according to claim 26 The method described in any one of to 40.