PDU session establishment method, related device and readable storage medium

Abstract

The present application discloses a PDU session establishment method, a related device and a readable storage medium, which belong to the technical field of communication. The PDU session establishment method includes a step of: a relay terminal sending first information, the first information indicating that a PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to Chinese Patent Application No. 202110357732.6 filed in China on April 1, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of communications, and in particular to a PDU session establishment method, related device, and readable storage medium. [Background technology]

[0003] Currently, when a relay terminal (relay UE) requests the establishment of a Protocol Data Unit (PDU) session, the relay terminal requests the establishment of the PDU session based on its own terminal route selection policy (URSP). As a result, the PDU session established based on the request of the relay terminal is determined by the network side device as a session for transmitting traffic of the relay terminal, and the established PDU session cannot meet the Quality of Service (QoS) needs of traffic of the remote terminal connected to the relay terminal, and further reduces the reliability of traffic transmission of the remote terminal. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a PDU session establishment method, related device, and readable storage medium that can solve the problem in the prior art that a PDU session established based on a request of a relay terminal cannot meet the QoS needs of the traffic of a remote terminal connected to the relay terminal, resulting in low reliability of traffic transmission of the remote terminal.

[0005] In the first aspect, A PDU session establishment method is provided, the method including a step of a relay terminal sending first information, the first information indicating that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0006] In a second embodiment, a step of receiving first information by a first core network device, the first information indicating that a PDU session establishment request sent from a relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal; the first core network device transmitting second information; The present invention provides a PDU session establishment method, wherein the second information is determined based on the first information, and the second information is one of a QoS rule and a Policy and Charging Control (PCC) rule.

[0007] In a third aspect, A PDU session establishment device is provided, the PDU session establishment device including a first transmitting module for transmitting first information, the first information indicating that a PDU session establishment request transmitted from a relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0008] In a fourth aspect, a second receiving module for receiving first information, the first information indicating that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal; a second transmitting module for transmitting the second information; The PDU session establishment device provides the second information, which is determined based on the first information, and the second information is one of a QoS rule and a Policy and Charging Control (PCC) rule.

[0009] In a fifth aspect, there is provided a terminal comprising a processor, a memory, and programs or commands stored in the memory and executable on the processor, the programs or commands, when executed by the processor, realizing steps of the method according to the first aspect.

[0010] In a sixth aspect, there is provided a network side device comprising a processor, a memory, and a program or command stored in the memory and executable on the processor, the program or command realizing the steps of the method according to the second aspect when executed by the processor.

[0011] In a seventh aspect, a terminal is provided that includes a processor and a communication interface, wherein the communication interface is used to transmit first information, the first information indicating that a PDU session establishment request transmitted from a relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0012] In an eighth aspect, a network side device is provided, the network side device including a processor and a communication interface, the communication interface receiving first information, the first information indicating that a PDU session establishment request sent from a relay terminal is for requesting establishment of a relay PDU session, the relay PDU session is used to relay traffic data of a remote terminal, and the network side device is used to send second information, where the second information is determined based on the first information, and the second information is any one of a QoS rule and a policy and charging control PCC rule.

[0013] In a ninth aspect, there is provided a readable storage medium having stored thereon a program or command which, when executed by a processor, causes the steps of the method according to the first aspect to be realized or causes the steps of the method according to the second aspect to be realized.

[0014] In a tenth aspect, there is provided a chip including a processor and a communication interface, the communication interface and the processor being coupled to each other, the processor executing a program or command of a network side device to realize the method described in the first aspect, or to realize the method described in the second aspect.

[0015] In an eleventh aspect, there is provided a computer program / program product stored in a non-volatile storage medium and executed by at least one processor to implement the method according to the first aspect or to implement the method according to the second aspect.

[0016] In a twelfth aspect, there is provided a communications device implementing a method according to the first aspect or arranged to implement a method according to the second aspect. Effect of the Invention

[0017] In an embodiment of the present application, the relay terminal can send first information indicating that the PDU session establishment request sent from the relay terminal is to request the establishment of a relay PDU session, and thus the network side equipment can establish a PDU session based on the QoS needs between the relay terminal and the anchor UPF and the QoS needs between the remote terminal and the relay terminal, so that the established PDU session can meet the traffic forwarding needs of the remote terminal, and the reliability of traffic transmission of the remote terminal can be improved. [Brief description of the drawings]

[0018] [Figure 1] 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied. [Diagram 2] FIG. 2 is a schematic diagram of a relay link establishment procedure provided in an embodiment of the present application; [Diagram 3] Figure 1 is a procedure diagram of the PDU session establishment method provided in an embodiment of the present application. [Figure 4] Figure 2 is a procedure diagram of the PDU session establishment method provided in an embodiment of the present application. [Diagram 5] Schematic diagram 1 of the PDU session establishment procedure provided in an embodiment of the present application. [Figure 6] Schematic diagram 2 of the PDU session establishment procedure provided in an embodiment of the present application. [Figure 7] FIG. 1 is a structural diagram of a PDU session establishment device provided in an embodiment of the present application. [Figure 8] FIG. 2 is a structural diagram of a PDU session establishment device provided in an embodiment of the present application. [Figure 9] FIG. 2 is a structural diagram of a communication device provided in an embodiment of the present application; [Figure 10] FIG. 2 is a structural diagram of a terminal provided in an embodiment of the present application; [Figure 11] FIG. 2 is a structural diagram of a network side device provided in an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative efforts are within the scope of protection of the present application.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are not intended to describe a particular order or sequence, but are intended to distinguish between similar objects. It should be understood that the terms used in this manner may be substituted for each other where appropriate, so that the embodiments of the present application may be performed in an order other than that shown or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object may be one or more. In the specification and claims, "and / or" indicates at least one of the objects connected, and the symbol " / " generally indicates that the related objects before and after are in an "or" relationship.

[0021] It should be noted that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application can generally be used interchangeably, and the technology described can be used in the above systems and wireless technologies, or in other systems and wireless technologies. For illustrative purposes, the following description describes a New Radio (NR) system, and NR terminology is used in most of the following description, however, these techniques are applicable to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0022] FIG. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network side device 12. Here, the terminal 11 may be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a terminal side device such as a mobile phone, a tablet computer, a laptop computer also called a notebook computer, a personal digital assistant (PDA), a personal digital assistant, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), a wearable device, a vehicle-mounted device (VUE), a pedestrian terminal (PUE), etc., and the wearable device includes a smart watch, a bracelet, an earphone, a pair of glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side equipment 12 may be a base station or a core network, in which the base station may be called a Node B, an evolved Node B, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting receiving point (TRP), or any other suitable term in the art, and as long as the same technical effect can be achieved, the base station is not limited to a specific technical term. It should be noted that in the embodiments of the present application, only a base station in an NR system is taken as an example, but the specific type of the base station is not limited.

[0023] For ease of understanding, some of the contents related to the embodiments of the present application will be described below.

[0024] The relay link establishment procedure of Layer (L) 3 will be described below with reference to FIG.

[0025] As shown in FIG. 2, the L3 relay link establishment procedure may include the following steps 0a, 0b, and 1 to 6.

[0026] Step 0a is an authorization and provisioning procedure for a relay terminal (Authorization and Provisioning for Relay UE).

[0027] As shown in FIG. 2, step 0a can be performed by a Relay UE, a New Generation-Radio Access Network (NG-RAN), an Access and Mobility Management Function (AMF), a Session Management Function (SMF) and a User Plane Function (UPF).

[0028] In the embodiments of the present application, the Relay UE may be referred to as a relay between a short-distance service terminal and a network (Proximity Services UE-to-Network Relay, ProSe UE-to-Network Relay), or a relay between a UE and a network (UE-to-Network Relay), etc.

[0029] Step 0b is the authorization and provisioning procedure for the remote terminal (Authorization and Provisioning for Remote UE).

[0030] Step 0b can be performed by a remote terminal (Remote UE), a Relay UE, an NG-RAN, an AMF, an SMF and an UPF.

[0031] Step 1 is a protocol data unit session establishment procedure (PDU session establishment).

[0032] Step 1 can be performed by Relay UE, NG-RAN, AMF, SMF and UPF.

[0033] Step 2 is the Discovery Procedure.

[0034] Step 2 may be performed by a Remote UE and a Relay UE. In the discovery procedure, a Remote UE may discover one Relay UE.

[0035] Step 3a is the establishment of connection for one-to-one communication.

[0036] As shown in FIG. 2, step 3a may be performed by a Remote UE and a Relay UE.

[0037] In step 3b, the Relay UE may establish a new PDU session or modify existing PDU session for relaying.

[0038] Step 3b can be performed by Relay UE, NG-RAN, AMF, SMF and UPF.

[0039] Step 4 is Internet Protocol (IP) address / prefix allocation.

[0040] Step 4 may be performed by the Remote UE and the Relay UE.

[0041] Step 5 is a remote UE report.

[0042] During implementation, the remote terminal can report information such as remote user identifier (Remote User ID), remote terminal information (Remote UE info) etc. to the SMF.

[0043] Step 6 is relayed traffic.

[0044] In implementation, the relay traffic may run between a remote terminal and a relay terminal, or between a relay terminal and a UPF.

[0045] Below, with reference to the drawings, the PDU session establishment method provided in the embodiments of the present invention will be described in detail in several embodiments and its application scenarios.

[0046] Please refer to Fig. 3, which is a procedure diagram 1 of a PDU session establishment method provided in an embodiment of the present application. The PDU session establishment method corresponding to Fig. 3 can be performed by a terminal. As shown in Fig. 3, it may include the following step 301:

[0047] In step 301, a relay terminal sends first information, where the first information indicates that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0048] In the embodiments of the present application, the relay terminal sending the first information may specifically mean that the relay terminal sends the first information to a first core network device, and the first core network device may be at least one of an SMF and a policy control function entity (Policy Control Function, PCF), and specifically may be determined according to actual circumstances, and the embodiments of the present application are not limited thereto.

[0049] When specifically implemented, the first information can directly or indirectly indicate that the PDU session establishment request sent from the relay terminal is used to request the establishment of a relay PDU session. In an embodiment of the present application, the relay PDU session is used to relay (or forward) traffic data of the remote terminal.

[0050] It should be noted that the PDU session establishment request indicated by the first information may be part or all of the PDU session establishment request sent from the relay terminal, and specifically, may be determined according to actual circumstances, and the embodiments of the present application are not limited thereto.

[0051] The first information and the PDU session establishment request indicated by it may be associated in any of the following ways 1) to 2).

[0052] 1) The first information is carried in the PDU session establishment request. 2) The first information includes a target parameter, and the target parameter corresponds to a PDU session establishment request one-to-one, that is, one target parameter can determine one PDU session establishment request. Optionally, the target parameter may be, but is not limited to, identifier information of the PDU session establishment request.

[0053] In 1), the PDU session establishment request indicated by the first information is a PDU session establishment request in which the first information is carried. For example, assume that the first information a is carried in PDU session establishment request 1 and the first information b is carried in PDU session establishment request 2. Then, the first information a indicates that the PDU session establishment request 1 is for requesting the establishment of a relay PDU session, and the first information b indicates that the PDU session establishment request 2 is for requesting the establishment of a relay PDU session.

[0054] In 2), the PDU session establishment request indicated by the first information is a PDU session establishment request corresponding to the identifier information of the PDU session establishment request included in the first information. For example, assume that the first information c includes the identifier information of PDU session establishment request 3, and the first information d includes the identifier information of PDU session establishment request 4 and the identifier information of PDU session establishment request 5. Then, the first information c indicates that the PDU session establishment request 3 is for requesting the establishment of a relay PDU session, and the first information d indicates that the PDU session establishment request 4 and the PDU session establishment request 5 are for requesting the establishment of a relay PDU session.

[0055] Regarding 2), in actual applications, the relay terminal may transmit the first information by reusing an existing message, such as a PDU session establishment request, or may transmit the first information through a newly added message, which is dedicated to transmitting the first information, and the first information may be transmitted separately or together with other information. Specifically, this can be determined according to actual situations, and the embodiments of the present application are not limited thereto.

[0056] In the PDU session establishment method of this embodiment, the relay terminal can send first information indicating that the PDU session establishment request sent from the relay terminal is to request the establishment of a relay PDU session, and thus the first core network equipment can establish a PDU session based on the QoS needs between the relay terminal and the anchor UPF and the QoS needs between the remote terminal and the relay terminal, so that the established PDU session can meet the traffic forwarding needs of the remote terminal, and the reliability of traffic transmission of the remote terminal can be improved.

[0057] The first information in an embodiment of the present application will be described below.

[0058] Optionally, the first information is: a) QoS needs between the relay terminal and the remote terminal; b) relay communication indication information for indicating that the PDU session established based on a request from the relay terminal is the relay PDU session; and c) dedicated parameters of the relay PDU session.

[0059] When the first information includes a), the first information indirectly indicates that the PDU session establishment request is used to request the establishment of a relay PDU session.

[0060] Optionally, the QoS needs between the relay terminal and the remote terminal may include at least one of a Packet Delay Budget (PDB), a Packet Error Rate (PER), and a PC5 QoS Identifier (PQI), where PC5 can be understood as a communication interface between a relay terminal and a remote terminal.

[0061] In this case, the first information can further indicate the QoS needs between the relay terminal and the remote terminal, in addition to indicating that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session. In this way, when the first core network device establishes a PDU session based on the PDU session establishment request indicated by the first information, the first core network device can directly use the QoS needs between the relay terminal and the remote terminal included in the first information to establish a relay PDU session, on the one hand, the established PDU session can meet the traffic forwarding needs of the remote terminal and improve the reliability of the traffic transmission of the remote terminal, and on the other hand, the method of the first core network device to obtain the QoS needs between the relay terminal and the remote terminal can be simplified.

[0062] When the first information includes b), the first information directly indicates that the PDU session establishment request is used to request the establishment of a relay PDU session.

[0063] When the first information includes c), the first information indirectly indicates that the PDU session establishment request is used to request the establishment of a relay PDU session. The dedicated parameters of the relay PDU session are literally dedicated to the relay PDU session, and are different from the parameter fields of other PDU sessions that do not meet the traffic data transfer requirements of the remote terminal, so that when the first core network device receives these parameters, it can determine that the PDU session establishment request indicated by the first information is used to request the establishment of a relay PDU session, thereby improving the accuracy and reliability of the PDU session establishment.

[0064] Optionally, the dedicated parameters may include at least one of, but are not limited to, a dedicated Data Network Name (DNN), a dedicated Single Network Slice Selection Assistance Information (SNSSAI), a dedicated Session and Service Continuity (SSC), and the like.

[0065] In an embodiment of the present application, optionally, after the relay terminal sends the first information, the method includes: The method may further include a step of receiving a quality of service QoS rule by the relay terminal, the QoS rule being determined based on the first information.

[0066] In particular, after receiving the first information, the first core network device can obtain a second sub-QoS need according to the first information, and the second sub-QoS need is a QoS need between the relay terminal and the remote terminal. Considering that the relay terminal communicates with the remote terminal through a PC5 interface, the second sub-QoS need can be called, but is not limited to, a PC5 segment QoS need.

[0067] As can be seen from the above, the first information may have different expression formats, and in actual applications, for the first information in different expression formats, the first core network device can obtain PC5 segment QoS needs in different ways, specifically, please refer to the description of the first core network device below, and the description will be omitted here.

[0068] After obtaining the PC5 segment QoS needs, the first core network device can divide the first QoS needs according to the second sub-QoS needs to obtain first sub-QoS needs, where the first QoS needs are QoS needs between the remote terminal and an anchor user plane function (UPF), and the first sub-QoS needs are QoS needs between the relay terminal and an anchor UPF. For ease of understanding, the first QoS needs may be referred to as end-to-end QoS needs, and considering that the relay terminal communicates with the UPF through a Uu interface, the first sub-QoS needs may be referred to as, but are not limited to, Uu segment QoS needs.

[0069] In practical application, QoS needs can be characterized by one or more parameters. The method of dividing end-to-end QoS needs may vary according to different parameters, and for details, refer to the description of the first core network device below, and the description is omitted here.

[0070] Then, the first core network equipment can generate the QoS rule and the QoS profile based on the QoS needs of the Uu segment obtained by division, and can send the QoS rule to a relay terminal and send the QoS profile to a base station.

[0071] According to the above method, the QoS needs of the Uu segment of the generated QoS rule and QoS profile are obtained by dividing the end-to-end QoS needs of the remote terminal based on the QoS needs of the PC5 segment. As can be seen from the above, the generated QoS rule and QoS profile not only consider the QoS needs of the segment from the relay UE to the anchor UPF, i.e., the QoS needs of the Uu segment, but also comprehensively consider the QoS needs of the segment from the remote terminal to the relay terminal, i.e., the QoS needs of the PC5 segment. In this way, the generated QoS rule and QoS profile can meet the end-to-end QoS needs of the remote terminal, so that the established PDU session can meet the traffic forwarding needs of the remote terminal, and improve the reliability of the traffic transmission of the remote terminal.

[0072] Please refer to Figure 4, which is a procedure diagram 2 of the PDU session establishment method provided in the embodiment of the present application. The PDU session establishment method corresponding to Figure 4 is executed by the first core network device. As shown in Figure 4, it may include the following steps 401-402.

[0073] In step 401, a first core network device receives first information, the first information indicating that a PDU session establishment request sent from a relay terminal is to request the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0074] In the embodiments of the present application, the first core network device may be an SMF or a PCF, and specifically, it can be determined according to actual circumstances, and the embodiments of the present application are not limited thereto.

[0075] When the first core network device is an SMF, the first core network device receiving the first information may specifically mean that the SMF receives the first information transmitted from the relay terminal.

[0076] When the first core network device is a PCF, in a first realization form, the first core network device receiving the first information may be the PCF receiving the first information transmitted from the relay terminal, and in a second realization form, the first core network device receiving the first information may be the PCF receiving the first information transmitted from the SMF.

[0077] It should be noted that this embodiment is an embodiment of a network side device corresponding to the method embodiment of Figure 3, and the first information and the relay PDU session can be referred to in the description of the method embodiment of Figure 3, and detailed description will be omitted here.

[0078] Optionally, the first information is: QoS needs between the relay terminal and the remote terminal; and relay communication instruction information for indicating that the PDU session established based on a request from the relay terminal is the relay PDU session; and dedicated parameters for the relay PDU session.

[0079] Furthermore, the QoS needs between the relay terminal and the remote terminal may include at least one of a PDB, a PER, and a PQI.

[0080] Alternatively, the first information transmitted from the relay terminal may be carried in the PDU session establishment request or may be transmitted separately from the PDU session establishment request; specifically, this can be determined according to actual circumstances, and the embodiments of the present application are not limited thereto.

[0081] In step 402, the first core network device transmits second information.

[0082] Here, the second information is determined based on the first information, and the second information is any one of a QoS rule and a Policy and Charging Control (PCC) rule.

[0083] When the first core network device is a PCF, for the first implementation form, the second information can be expressed as a QoS rule, and the QoS rule can be generated by the PCF based on the first information, and for the second implementation form, the second information can be expressed as a PCC rule, and the PCC rule can be generated by the PCF based on the first information.

[0084] When the first core network device is an SMF, the second information can be expressed as a QoS rule. In this case, in a third implementation, the QoS rule can be generated by an SMF based on the first information, and in a fourth implementation, the QoS rule can be generated by a PCC rule sent from a PCF, where the PCC rule sent from the PCF is generated by the PCF based on the first information.

[0085] In the PDU session establishment method of this embodiment, after receiving first information sent from a relay terminal, the first core network device can send a QoS rule or PCC rule determined based on the first information, where the first information indicates that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, so that the QoS rule or PCC rule can not only consider the QoS needs between the relay UE and the anchor UPF, but also comprehensively consider the QoS needs between the remote terminal and the relay terminal, so that the established PDU session can meet the traffic forwarding needs of the remote terminal, and improve the reliability of traffic transmission of the remote terminal.

[0086] In the embodiments of the present application, for the first to fourth realization forms described above, the processing operation of the first core network device after receiving the first information may be the same or different, and a specific explanation is provided as follows.

[0087] First, regarding the fourth realization mode mentioned above.

[0088] Optionally, when the second information is the QoS rule, after the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, the method further comprises: the first core network device transmitting the first information to a second core network device; a step of receiving a PCC rule sent by the first core network device from the second core network device, the PCC rule being generated by the second core network device based on the first information; The method further includes generating the QoS rule by the first core network device according to the PCC rule.

[0089] In this alternative embodiment, the first core network device is an SMF, the second core network device is a PCF, and the second information is a QoS rule. It should be noted that this alternative embodiment may not be limited to only be applied to the fourth implementation mode described above.

[0090] In a specific implementation, after receiving the first information sent from the relay terminal, the SMF can forward the received first information to the PCF, and the PCF generates a PCC rule based on the first information and sends the PCC rule to the SMF. It should be noted that the implementation principle of the PCF generating the PCC rule based on the first information in this case is the same as the implementation principle of the first core network device generating the second information based on the first information, which will be described later. For details, the following related description can be referred to, and the description will be omitted here.

[0091] After receiving the PCC rule sent by the PCF according to the first information, the SMF can generate a QoS rule according to the PCC rule. In implementation, after generating a Uu segment QoS need according to the PCC rule, the SMF can generate a QoS rule and a QoS profile according to the Uu segment QoS need, send the QoS rule to the relay terminal, and send the QoS profile to the base station.

[0092] Optionally, the step of transmitting the first information from the first core network device to the second core network device includes: The first core network device transmits a session management policy association establishment message to a second core network device, the first information being carried in the session management policy association establishment message; The step of receiving a PCC rule transmitted by the first core network device from the second core network device includes: The step includes a step of the first core network device receiving a session management policy related response message sent from the second core network device, the session management policy related response message including a PCC rule.

[0093] In this case, the first information transferred from the SMF to the PCF may be carried in a session management policy association create message, and the PCC rule sent from the PCF to the SMF may be carried in a session management policy association response message.

[0094] However, it should be noted that in some embodiments, the SMF can transfer the first information to the PCF by reusing an existing message other than the SM policy association create message or by using a dedicated message, and the PCF can send a PCC rule to the SMF by reusing an existing message other than the (SM policy association response) message or by using a dedicated message, and the specific details can be determined according to actual circumstances, and the embodiments of the present application are not limited thereto.

[0095] Second, regarding the first to third realization forms mentioned above.

[0096] Optionally, after the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, the method further comprises: The first core network device further includes a step of dividing the first QoS needs based on the first information to obtain first sub-QoS needs, the first QoS needs being QoS needs between the remote terminal and an anchor user plane function (UPF), and the first sub-QoS needs being QoS needs between the relay terminal and an anchor UPF; Here, the second information is generated based on the first sub-QoS needs.

[0097] In an alternative embodiment, the first core network device may be an SMF or a PCF, and the second information may be a QoS rule or a PCC rule, and may be specifically determined according to actual circumstances, and the embodiment of the present application is not limited thereto. It should be noted that the alternative embodiment may not be limited to only apply from the first implementation to the third implementation.

[0098] When specifically implemented, the first core network device can divide the end-to-end QoS needs into Uu segment QoS needs and PC5 segment QoS needs based on the first information, and generate second information according to the Uu segment QoS needs obtained by the division.

[0099] Optionally, the step of the first core network device dividing the first QoS needs based on the first information to obtain first sub-QoS needs includes: determining, by the first core network device, second sub-QoS needs based on the first information; The first core network device divides the first QoS needs according to the second sub-QoS needs to obtain the first sub-QoS needs; Here, the second sub-QoS needs are the QoS needs between the relay terminal and the remote terminal.

[0100] In this optional embodiment, when the first core network device divides the end-to-end QoS needs into Uu segment QoS needs and PC5 segment QoS needs based on the first information, the first information can be used to determine the PC5 segment QoS needs, specifically, the PC5 segment QoS needs can be determined by obtaining the Uu segment QoS needs based on the first information, but is not limited thereto.

[0101] In implementation, for the first information in different expression formats, the acquisition methods of the PC5 segment QoS needs may be the same or different, and the PC5 segment QoS needs determined by the first core network device may be the same or different, and the specific descriptions are as follows:

[0102] Optionally, the second sub-QoS needs include: When the first information includes a QoS need between the relay terminal and the remote terminal, the second sub-QoS need is the QoS need; When the first information does not include QoS needs between the relay terminal and the remote terminal, the second sub-QoS needs satisfy any one of the following: determined based on an operator policy, determined based on a local policy, specified by a protocol, or configured by a network side device.

[0103] In particular, when the first information includes the QoS needs between the relay terminal and the remote terminal, the first core network device can directly determine the QoS needs between the relay terminal and the remote terminal included in the first information as the PC5 segment QoS needs, in which case the PC5 segment QoS needs are obtained from the first information.

[0104] When the first information does not include the QoS needs between the relay terminal and the remote terminal, for example, when the first information includes the relay communication instruction information or the dedicated parameters of the relay PDU session, the first core network device may determine the PC5 segment QoS needs according to an operator policy or a local policy, or the first core network device may directly determine the PC5 segment QoS needs defined by a protocol or configured by a network side device as the PC5 segment QoS needs. In this case, the acquisition manner of the PC5 segment QoS needs can satisfy any one of the following: determined based on an operator policy, determined based on a local policy, defined by a protocol, and configured by a network side device.

[0105] As can be seen from the above, the above method enables the first core network device to flexibly determine PC5 segment QoS needs in various ways based on the first information, thereby improving the flexibility of determining PC5 segment QoS needs.

[0106] The first core network device determines the PC5 segment QoS needs based on the first information, and then uses the determined PC5 segment QoS needs to divide the end-to-end QoS needs to obtain the Uu segment QoS needs.

[0107] In the embodiment of the present application, optionally, the first QoS needs (ie, end-to-end QoS needs) may include at least one of PDB, PER. The first sub-QoS needs (i.e., Uu segment QoS needs) may include at least one of PDB, PER, a 5th generation communication technology quality of service identifier (5G QoS identifier, 5QI), a guaranteed flow bit rate (GFBR), and a maximum flow bit rate (MFBR).

[0108] In implementation, for different parameters in the end-to-end QoS needs, the partitioning methods may be the same or different. For example, when partitioning the PDB in the end-to-end QoS needs, the PDB in the PC5 segment QoS needs can be subtracted from the PDB in the end-to-end QoS needs to obtain the PDB of the Uu segment QoS needs, that is, the partitioning method of the PDB is subtraction. The partitioning method of other parameters such as PER may be the same as or different from the partitioning method of the PDB, and the partitioning method of other parameters may be specified by the protocol or configured by the network side equipment. Specifically, it can be determined according to the actual situation, and the embodiments of the present application are not limited thereto.

[0109] In an embodiment of the present application, optionally, when the first information is a dedicated parameter of the relay PDU session, after the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, the method includes: The first core network device searches terminal contract data to obtain a first search result related to the dedicated parameter; The method further includes a step of the first core network device determining that the first PDU session establishment request is for requesting establishment of a relay PDU session when the first search result indicates that the dedicated parameters are dedicated parameters of a relay PDU session.

[0110] In this optional embodiment, after obtaining the parameters of the relay PDU session, if the first core network device cannot determine whether the parameters are dedicated parameters of the relay PDU session, the first core network device can determine whether the parameters are dedicated parameters of the relay PDU session by searching terminal contract data, so that the established PDU session can be matched with the PDU session requested to be established, and the accuracy and reliability of the PDU session establishment can be improved.

[0111] Optionally, if the second information is the QoS rule, after the step of the first core network device receiving the first information, the method further comprises: The method further includes the step of the first core network device transmitting a QoS profile; Here, the QoS profile is determined based on the first information.

[0112] It should be noted that the method of determining the QoS profile is the same as the method of determining the second information when the second information is a QoS rule. For details, refer to the related description, and detailed description will be omitted here.

[0113] It should be noted that in some embodiments, when the first core network device divides the end-to-end QoS needs into Uu segment QoS needs and PC5 segment QoS needs based on the first information, the first information may be used to determine the Uu segment QoS needs, and the manner of determining the Uu segment QoS needs based on the first information may be the same as the method of determining the PC5 segment QoS needs based on the first information, for example, the first information may include the QoS needs between the relay terminal and the anchor UPF, specifically, reference may be made to the relevant description of the step of determining the PC5 segment QoS needs based on the first information, and detailed description will be omitted here.

[0114] The various embodiments introduced in the examples of the present application may be realized in combination with each other or alone, and the examples of the present application are not limited thereto.

[0115] For ease of understanding, the following is an illustrative example.

[0116] The relay UE may transmit first information to a core network device, and the first information may include at least one of the following 1) to 3).

[0117] 1) QoS information (i.e., QoS needs) between Relay UE and remote UE. The QoS information includes: PDB between Relay UE and remote UE, PER between Relay UE and remote UE, and PQI between the Relay UE and the remote UE.

[0118] 2) Relay communication indication information for indicating that the PDU session requested to be established is to be used for relay communication.

[0119] 3) A dedicated relay PDU session parameter including at least one of a dedicated DNN, a dedicated SNSSAI, a dedicated SSC, etc.

[0120] Core network equipment: A step 1 can be performed of obtaining first information and performing a first operation based on the first information.

[0121] The first information can be referred to above, and detailed description thereof will be omitted here.

[0122] The first operation includes the following 1) to 2).

[0123] 1) Split the end-to-end QoS information into PC5 segment QoS information and Uu segment QoS information, where the QoS information may include at least one of PDB, PER, PQI, 5QI, etc.

[0124] 2) Generate a QoS rule and a Uu segment QoS profile for the Uu segment based on the Uu segment QoS information, send the QoS rule for the Uu segment to the relay UE, and send the Uu segment QoS profile to the gNB.

[0125] When the first information indicates that the PDU session requested to be established is used for relay communication by carrying QoS information between a Relay UE and a remote UE, performing the step of splitting end-to-end QoS information into PC5 segment QoS information and Uu segment QoS information includes determining Uu segment QoS information by subtracting QoS information between a Relay UE and a remote UE from the end-to-end QoS information.

[0126] When the first information carries relay communication instruction information or a dedicated relay PDU session parameter and indicates that the PDU session requested to be established is to be used for relay communication, the Uu segment QoS information can be determined in a form such as fixing an operator policy or PC5 segment QoS information.

[0127] When the first information includes a dedicated relay PDU session parameter, it is also possible to determine whether the PDU session is used for relay communication by searching UE subscription data based on the first information.

[0128] Example 1

[0129] As shown in FIG. 5, the PDU session establishment method may include the following steps 0 to 5.

[0130] In step 0, the remote UE and the relay UE perform a discovery procedure, and the remote UE discovers one relay UE.

[0131] In step 1, the remote UE and the relay UE perform a point-to-point L2 connection establishment procedure.

[0132] In step 2, the Relay UE sends a PDU session establishment request to a corresponding Relay core network device (Core Network, CN), and the PDU session establishment request carries first information.

[0133] The first information may refer to the above description, and detailed description will be omitted here.

[0134] In step 3, the Relay CN determines the QoS information of the Uu segment based on the first information.

[0135] Furthermore, the Relay CN generates a QoS rule and a Uu segment QoS profile for the Uu segment based on the Uu segment QoS information.

[0136] In step 4, the Relay CN sends the QoS rule of the generated Uu segment to the relay UE.

[0137] In step 5, the Relay CN sends the generated Uu segment QoS profile to the gNB.

[0138] In the first embodiment, the Relay CN may be an SMF or a PCF, and the specific details may be determined according to the actual situation, and the embodiment of the present application is not limited thereto.

[0139] Example 2

[0140] As shown in FIG. 6, the PDU session establishment method may include the following steps 0 to 5.

[0141] In step 0, the remote UE and the relay UE perform a discovery procedure, and the remote UE discovers one relay UE.

[0142] In step 1, the remote UE and the relay UE perform a point-to-point L2 connection establishment procedure.

[0143] In step 2, the Relay UE sends a PDU session establishment request to its corresponding SMF, and the PDU session establishment request carries first information.

[0144] In step 3a, after receiving the first information, the SMF sends the first information to the PCF via a SM policy association create message.

[0145] In step 3b, the PCF determines QoS information for the Uu segment based on the first information.

[0146] Furthermore, the PCF generates a PCC rule after determining the QoS information of the Uu segment based on the first information.

[0147] In step 3c, the PCF sends the generated PCC rules to the SMF via an SM policy association response message.

[0148] The SMF generates QoS information for the Uu segment based on the received PCC rule, and generates a QoS rule for the Uu segment and a Uu segment QoS profile based on the Uu segment QoS information.

[0149] In step 4, the SMF sends the QoS rule of the generated Uu segment to the relay UE.

[0150] In step 5, the SMF sends the generated Uu segment QoS profile to the gNB.

[0151] According to the embodiment of the present application, it is possible to avoid the established PDU session not meeting the data transmission needs of the remote UE, and to improve the reliability of the PDU session.

[0152] It should be noted that the execution body of the PDU session establishment method provided in the embodiment of the present application may be a PDU session establishment device, or a control module for executing the PDU session establishment method in the PDU session establishment device. In the embodiment of the present application, the PDU session establishment device is taken as an example to execute the PDU session establishment method, and the PDU session establishment device provided in the embodiment of the present application is described.

[0153] Please refer to FIG. 7, which is a structural diagram of a PDU session establishment device provided in an embodiment of the present application.

[0154] As shown in FIG. 7, the PDU session establishment device 700 includes: The present invention includes a first transmitting module 701 for transmitting first information, the first information indicating that a PDU session establishment request transmitted from a relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal.

[0155] Optionally, the PDU session establishment device 700 is The method further includes a first receiving module for receiving a quality of service QoS rule, the QoS rule being determined based on the first information.

[0156] Optionally, the first information is: QoS needs between the relay terminal and the remote terminal; and relay communication instruction information for indicating that the PDU session established based on a request from the relay terminal is the relay PDU session; and dedicated parameters for the relay PDU session.

[0157] Optionally, the QoS needs include at least one of a packet delay budget PDB, a packet error rate PER, and a PC5 quality of service identifier PQI.

[0158] Alternatively, the first information is carried in the PDU session establishment request.

[0159] The PDU session establishment device 700 may be a device or electronic device with an operating system, or may be a component, integrated circuit, or chip in a terminal. The device or electronic device may be a portable terminal or a non-portable terminal. For example, the portable terminal may include, but is not limited to, the types of terminals 11 listed above, and the non-portable terminal may be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), an automated teller machine or a kiosk, etc., and is not specifically limited in the embodiments of the present application.

[0160] The PDU session establishment device 700 provided in the embodiment of the present application can implement each process implemented in the method embodiment of Fig. 3 and achieve the same technical effects. To avoid duplication, detailed descriptions will be omitted here.

[0161] Please refer to FIG. 8, which is a structural diagram of a PDU session establishment device provided in an embodiment of the present application.

[0162] As shown in FIG. 8, the PDU session establishment device 800 includes: a second receiving module 801 for receiving first information, the first information indicating that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal; and a second transmitting module 802 for transmitting second information; Here, the second information is determined based on the first information, and the second information is any one of a QoS rule and a Policy and Charging Control (PCC) rule.

[0163] Optionally, when the second information is the QoS rule, the PDU session establishment device 800: a third sending module for sending the first information to a second core network device; a third receiving module for receiving a PCC rule sent from the second core network device, the PCC rule being generated by the second core network device based on the first information; and a generating module for generating the QoS rule according to the PCC rule.

[0164] Optionally, the third sending module is specifically used for sending a session management policy association establishment message to a second core network device, and the session management policy association establishment message is loaded with the first information; The third receiving module is specifically used for receiving a session management policy related response message sent from the second core network device, where the session management policy related response message includes a PCC rule.

[0165] Optionally, the first information is: QoS needs between the relay terminal and the remote terminal; and relay communication instruction information for indicating that the PDU session established based on a request from the relay terminal is the relay PDU session; and dedicated parameters for the relay PDU session.

[0166] Optionally, the QoS needs include at least one of PDB, PER, and PQI.

[0167] Optionally, the PDU session establishment device 800 is A first determination module for dividing a first QoS need based on the first information to obtain a first sub-QoS need, the first QoS need being a QoS need between the remote terminal and an anchor user plane function (UPF), and the first sub-QoS need being a QoS need between the relay terminal and an anchor UPF; Here, the second information is generated based on the first sub-QoS needs.

[0168] Optionally, the first determination module: a first determining unit for determining second sub-QoS needs based on the first information; a dividing unit for dividing the first QoS needs according to the second sub-QoS needs to obtain the first sub-QoS needs; Here, the second sub-QoS needs are the QoS needs between the relay terminal and the remote terminal.

[0169] Optionally, the second sub-QoS needs include: When the first information includes a QoS need between the relay terminal and the remote terminal, the second sub-QoS need is the QoS need; When the first information does not include QoS needs between the relay terminal and the remote terminal, the second sub-QoS needs satisfy any one of the following: determined based on an operator policy, determined based on a local policy, specified by a protocol, or configured by a network side device.

[0170] Optionally, the first QoS need includes at least one of PDB, PER; The first sub-QoS needs include at least one of PDB, PER, and a quality of service identifier 5QI of a fifth generation communication technology.

[0171] Optionally, when the first information is a dedicated parameter of the relay PDU session, the PDU session establishment device 800: a search module for searching terminal contract data to obtain a first search result related to the dedicated parameter; and a second determination module for determining that the first PDU session establishment request is for requesting establishment of a relay PDU session when the first search result indicates that the dedicated parameter is a dedicated parameter of a relay PDU session.

[0172] Optionally, the PDU session establishment device 800 is a fourth sending module for sending the QoS profile; The QoS profile is determined based on the first information.

[0173] The PDU session establishment device 800 may be a device, or may be a component, integrated circuit, or chip in a network side device. The network side device may include, but is not limited to, the types of network side device 12 listed above, and is not specifically limited in the embodiments of the present application.

[0174] The PDU session establishment device 800 provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 4 and achieve the same technical effects. To avoid duplication, detailed descriptions will be omitted here.

[0175] Optionally, as shown in FIG. 9, an embodiment of the present application further provides a communication device 900, which includes a processor 901, a memory 902, and a program or command stored in the memory 902 and executable by the processor 901. For example, when the communication device 900 is a terminal, when the program or command is executed by the processor 901, each process of the method embodiment of FIG. 3 described above can be realized, and the same technical effect can be achieved. When the communication device 900 is a network side device, when the program or command is executed by the processor 901, each process of the method embodiment of FIG. 4 described above can be realized, and the same technical effect can be achieved. To avoid repetition, detailed description is omitted here.

[0176] An embodiment of the present application further provides a terminal, the terminal including a processor and a communication interface, the communication interface is used for sending first information, the first information indicates that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used for relaying traffic data of a remote terminal. The embodiment of the terminal corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and realization form of the above-mentioned method embodiment can be applied to the embodiment of the terminal, and the same technical effects can be achieved. Specifically, FIG. 10 is a hardware structure schematic diagram of a terminal for implementing the embodiment of the present application.

[0177] FIG. 10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0178] The terminal 1000 includes elements such as, but not limited to, a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and a processor 1010.

[0179] Those skilled in the art can understand that the terminal 1000 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 1010 through a power management system, thus realizing functions such as charge / discharge management and power consumption management through the power management system. The structure of the terminal shown in FIG. 10 is not intended to limit the terminal, and the terminal may include more or fewer components than those shown, or a combination of some components, or a different component arrangement, and detailed description thereof will be omitted here.

[0180] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 for processing image data of static or video captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode, and a microphone 10042. The display unit 1006 may include a display panel 10061, which may be arranged in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. The other input devices 10072 may include, but are not limited to, a physical keyboard, a function button (e.g., a volume control button, a switch button, etc.), a trackball, a mouse, and a control lever, and detailed description thereof is omitted here.

[0181] In the embodiment of the present application, the high frequency unit 1001 receives downlink data from the network side device, processes the data in the processor 1010, and transmits uplink data to the network side device. Typically, the high frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a receiver-transmitter, a coupler, a low-noise amplifier, a duplexer, etc.

[0182] The memory 1009 can be used to store software programs or commands and various data. The memory 1009 may mainly include an area for storing programs or commands and a data storage area, which can store an operating system, applications or commands required for at least one function (e.g., audio playback function, image playback function, etc.). The memory 1009 may also include a high-speed random access memory or a non-volatile memory, among which the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory. For example, at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage device may be included.

[0183] The processor 1010 may include one or more processing units, and may optionally integrate an application processor that mainly processes an operating system, a user interface, and applications or commands, etc., and a modem processor that mainly processes wireless communications, such as a baseband processor, in the processor 1010. It is understandable that the modem processor may not be integrated into the processor 1010.

[0184] Here, the high frequency unit 1001 is used to transmit first information, and the first information indicates that the PDU session establishment request transmitted from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of the remote terminal.

[0185] It should be noted that in this embodiment, the terminal 1000 can realize each process in the method embodiment of FIG. 3 in the embodiment of the present application to achieve the same beneficial effects, and detailed description will be omitted here to avoid duplication.

[0186] An embodiment of the present application further provides a network side device, the network side device including a processor and a communication interface, the communication interface receiving first information, the first information indicating that a PDU session establishment request sent from a relay terminal is for requesting the establishment of a relay PDU session, the relay PDU session is used to relay traffic data of a remote terminal, and the first core network device is used to send second information, where the second information is determined based on the first information, and the second information is one of a QoS rule and a Policy and Charging Control (PCC) rule. The embodiment of the network side device corresponds to the method embodiment of the above network side device, and each implementation process and realization form of the above method embodiment are all applicable to the embodiment of the network side device, and can achieve similar technical effects.

[0187] Specifically, an embodiment of the present application further provides a network side device. As shown in Fig. 11, the network device 1100 includes an antenna 111, a radio frequency device 112, and a baseband device 113. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111, and transmits the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be transmitted and transmits it to the radio frequency device 112, and the radio frequency device 112 processes the received information before transmitting it via the antenna 111.

[0188] The above frequency band processing device may be in a baseband device 113 , and the method performed by the network side device in the above embodiment may be implemented in the baseband device 113 , which includes a processor 114 and a memory 115 .

[0189] The baseband device 113 may, for example, include at least one baseband board having multiple chips installed thereon, and as shown in FIG. 11, one of the chips may, for example, be a processor 114 connected to a memory 115 to call a program in the memory 115 to perform the operations of the network device as shown in the above method embodiments.

[0190] The baseband device 113 may further include a network interface 116 for communicating with the radio frequency device 112, the interface being, for example, a common public radio interface (abbreviated as CPRI).

[0191] Specifically, the network side device in the embodiment of the present application further includes a command or program stored in the memory 115 and executable by the processor 114, and the processor 114 can call the command or program in the memory 115 to execute each process in the method embodiment of Fig. 4 to achieve the same technical effect. In order to avoid duplication, detailed description will be omitted here.

[0192] The embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, each process of the method embodiment of Fig. 4 is realized, and the same technical effect can be achieved. In order to avoid duplication, detailed description is omitted here. Here, the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, etc.

[0193] The embodiments of the present application further provide a readable storage medium, which stores a program or command, and when the program or command is executed by a processor, each process of the method embodiment of Fig. 3 or Fig. 4 is realized, and the same technical effects can be achieved. To avoid duplication, detailed description is omitted here.

[0194] Here, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0195] The embodiments of the present application further provide a computer program product, which is stored in a non-transitory recording medium and executed by at least one processor to realize the processes of the method embodiments of Figure 3 or Figure 4 and achieve the same technical effects. To avoid duplication, detailed descriptions are omitted here.

[0196] The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor executes the program or command of the network side device to realize each process of the method embodiment of Figure 3 or Figure 4, and can achieve the same technical effects. In order to avoid duplication, detailed description is omitted here.

[0197] It should be understood that the chip described in the embodiments of the present application may be referred to as a system chip, a chip system, a system on a chip, or the like.

[0198] It should be noted that in this specification, the terms "comprise", "consist of" or any other variants are intended to include a non-exclusive inclusion, whereby a process, method, article or apparatus that includes a set of elements includes not only those elements, but also other elements not expressly stated or inherent to such process, method, article or apparatus. Unless otherwise specified, an element limited by the phrase "comprises a" does not exclude the presence of other identical elements in the process, method, article or apparatus that includes the element. It should also be noted that the scope of the method and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions substantially simultaneously or in the reverse order depending on such functions, for example, the described method may be performed in a different order than described, and various steps may be added, omitted or combined. Also, features described with reference to any example may be combined in other examples.

[0199] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be realized in the form of a combination of software and a necessary common hardware platform, and of course, they can be realized by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical solution of the present application can be substantially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes a number of commands that cause a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the embodiments of the present application.

[0200] Although the examples of the present application have been described above with reference to the drawings, the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative and not limiting. Based on the suggestions of the present application, many forms that a person skilled in the art can make without departing from the spirit of the present application and the scope of protection of the claims are all within the scope of protection of the present application.

Claims

1. A step of a first core network device receiving first information from a relay terminal or an SMF, the first information indicating that the PDU session establishment request sent from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal; the first core network device transmitting second information; The second information is determined based on the first information, and the second information is one of a QoS rule and a Policy and Charging Control (PCC) rule; The first information is carried in the PDU session establishment request, The first information includes dedicated parameters of the relay PDU session, the dedicated parameters including at least one of a dedicated data network name (DNN) and a dedicated single network slice selection assistance information (SNSSAI); A method for establishing a PDU session.

2. When the second information is the QoS rule, after the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, the first core network device transmitting the first information to a second core network device; a step of receiving a PCC rule sent by the first core network device from the second core network device, the PCC rule being generated by the second core network device based on the first information; The first core network device generates the QoS rule according to the PCC rule, The step of transmitting the first information from the first core network device to the second core network device includes: The first core network device transmits a session management policy association establishment message to a second core network device, the first information being carried in the session management policy association establishment message; The step of the first core network device receiving the PCC rule transmitted from the second core network device includes:

2. The method of claim 1, comprising the step of: the first core network device receiving a session management policy related response message sent from the second core network device, the session management policy related response message including a PCC rule.

3. The first information is QoS needs between the relay terminal and the remote terminal; and relay communication indication information for indicating that the PDU session established based on the request of the relay terminal is the relay PDU session; and further comprising at least one of: The method of claim 1 , wherein the QoS needs include at least one of PDB, PER, and PQI.

4. After the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, The first core network device further includes a step of dividing the first QoS needs based on the first information to obtain first sub-QoS needs, the first QoS needs being QoS needs between the remote terminal and an anchor user plane function (UPF), and the first sub-QoS needs being QoS needs between the relay terminal and an anchor UPF; The method of claim 1 , wherein the second information is generated based on the first sub-QoS needs.

5. The step of the first core network device dividing the first QoS need based on the first information to obtain a first sub-QoS need includes: determining, by the first core network device, second sub-QoS needs based on the first information; The first core network device divides the first QoS need according to the second sub-QoS need to obtain a first sub-QoS need; the second sub-QoS needs are QoS needs between the relay terminal and the remote terminal; The second sub-QoS need is: When the first information includes a QoS need between the relay terminal and the remote terminal, the second sub-QoS need is the QoS need; 5. The method according to claim 4, wherein, if the first information does not include QoS needs between the relay terminal and the remote terminal, the second sub-QoS needs are determined based on an operator policy, or are determined based on a local policy, or are specified by a protocol, or are configured by a network side device.

6. The first QoS need includes at least one of PDB, PER; The method of claim 4 , wherein the first sub-QoS needs include at least one of PDB, PER, and a quality of service identifier 5QI of a fifth generation communication technology.

7. When the first information is a dedicated parameter of the relay PDU session, after the step of the first core network device receiving the first information and before the step of the first core network device transmitting the second information, The first core network device searches terminal contract data to obtain a first search result related to the dedicated parameter; The method of claim 1, further comprising: the first core network device determining, when the first search result indicates that the dedicated parameters are dedicated parameters of a relay PDU session, that the first PDU session establishment request is for requesting establishment of a relay PDU session.

8. If the second information is the QoS rule, after the step of the first core network device receiving the first information, The method further includes the step of the first core network device transmitting a QoS profile to a base station; The method of claim 1 , wherein the QoS profile is determined based on the first information.

9. A step of a relay terminal transmitting first information to a first core network device, the first information indicating that the PDU session establishment request transmitted from the relay terminal is for requesting the establishment of a relay PDU session, and the relay PDU session is used to relay traffic data of a remote terminal, the first information being carried in the PDU session establishment request; The first information includes dedicated parameters of the relay PDU session, the dedicated parameters including at least one of a dedicated data network name (DNN) and a dedicated single network slice selection assistance information (SNSSAI); A method for establishing a protocol data unit (PDU) session.

10. After the step of transmitting the first information by the relay terminal, The method of claim 9, further comprising the step of: the relay terminal receiving quality of service QoS rules, the QoS rules being determined based on the first information.

11. The first information is QoS needs between the relay terminal and the remote terminal; and relay communication indication information for indicating that the PDU session established based on the request of the relay terminal is the relay PDU session; and a dedicated parameter for the relay PDU session.

12. The method of claim 11 , wherein the QoS needs include at least one of a packet delay budget (PDB), a packet error rate (PER), and a PC5 quality of service identifier (PQI).

13. A terminal including a processor, a memory, and a program or command stored in the memory and executable on the processor, the program or command being executed by the processor to realize steps of the PDU session establishment method according to any one of claims 9 to 12.

14. A network side device including a processor, a memory, and a program or command stored in the memory and executable on the processor, the program or command being executed by the processor to realize the steps of the PDU session establishment method according to any one of claims 1 to 8.

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