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EP-4284083-B1 - METHODS AND DEVICES FOR BEARER IDENTIFIER DETERMINATION AND CORRESPONDING STORAGE MEDIUM

EP4284083B1EP 4284083 B1EP4284083 B1EP 4284083B1EP-4284083-B1

Inventors

  • LI, ZHENDONG
  • ZHU, JINGUO

Dates

Publication Date
20260506
Application Date
20180810

Claims (15)

  1. A method for wireless communication, comprising: receiving, by a Session Management Function, SMF, network node in response to a mobility event of a user equipment from an Evolved Packet System to a Fifth Generation System, a request from a target Access and Mobility Function, AMF, network node, wherein the request is associated with a Packet Data Unit, PDU, session for the user equipment, wherein the PDU session corresponds to an Evolved Packet System Bearer Identifier, EBI, that is allocated to the PDU session in the EPS; and transmitting, by the SMF network node in response to the request from the target AMF network node, a response to the target AMF network node, the response comprising EBI information indicating the EBI allocated to the PDU session in the EPS.
  2. The method of claim 1, wherein the request associated with the PDU session comprises a Create Session Management, SM, context request.
  3. The method of claim 1, wherein the request associated with the PDU session comprises an Update Session Management, SM, context request.
  4. The method of any of claims 1 to 3, wherein the mobility event comprises an idle mode mobility event from the Evolved Packet System to the Fifth Generation System.
  5. The method of any of claims 1 to 3, wherein the mobility event comprises a handover from the Evolved Packet System to the Fifth Generation System.
  6. The method of any of claims 1 to 5, wherein the EBI information comprises a list of EBIs allocated to the PDU session and priority information corresponding to each EBI in the list.
  7. A method for wireless communication, comprising: transmitting, by a target Access and Mobility Function, AMF, network node in response to a mobility event of a user equipment from an Evolved Packet System to a Fifth Generation System, a request to a Session Management Function, SMF, network node corresponding to a Packet Data Unit, PDU, session for a user equipment, wherein the PDU session corresponds to an Evolved Packet System Bearer Identifier, EBI, that is allocated to the PDU session in the EPS; receiving, by the target AMF network node, a response from the SMF network node in response to the request, the response comprising EBI information indicating the EBI allocated to the PDU session in the EPS.
  8. The method of claim 7, wherein the request associated with the PDU session comprises a Create Session Management, SM, context request.
  9. The method of claim 7, wherein the request associated with the PDU session comprises an Update Session Management, SM, context request.
  10. The method of any of claims 7 to 9, wherein the mobility event comprises an idle mode mobility event from the Evolved Packet System to the Fifth Generation System.
  11. The method of any of claims 7 to 9, wherein the mobility event comprises a handover from the Evolved Packet System to the Fifth Generation System.
  12. The method of any of claims 7 to 11, wherein the EBI information comprises a list of EBIs allocated to the PDU session and priority information corresponding to each EBI in the list.
  13. A communication apparatus implemented as the SMF network node, comprising one or more processors configured to control the communication apparatus to perform the steps of a method recited in any one or more of claims 1 to 6.
  14. A communication apparatus implemented as the target AMF network node, comprising one or more processors configured to control the communication apparatus to perform the steps of a method recited in any one or more of claims 7 to 12.
  15. A computer program product having code stored thereon, the code, when executed by a processor associated with a SMF network node, causing the SMF network node to perform the steps of a method recited in any one or more of claims 1 to 6, and when executed by a processor associated with a target AMF network node, causing the target AMF network node to perform the steps of a method recited in any one or more of claims 7 to 12.

Description

TECHNICAL FIELD The present disclosure refers to the field of Next Generation wireless communications (5G), and specifically, to a method and a device for determining an Evolved Packet System (EPS) bearer identifier (ID), and a storage medium. BACKGROUND The 3rd Generation Partnership Project (3GPP) began to develop a fourth-generation (or Long Term Evolution (LTE)) mobile communication system from Release 8 (R8). FIG. 1 is a network architecture diagram of the fourth-generation mobile communication system in a related art, and functions of the various network elements are described below. A user equipment (UE) is accessed to the 4G network and obtains services mainly via a wireless air interface. The UE interacts with a base station via the air interface, and interacts with a mobility management entity (MME) of a core network via non-access-stratum (NAS) signaling. A radio access network (RAN) base station (eNB) is responsible for air interface resource scheduling and air interface connection management of a network to which the UE is accessed to. The MME is a core network control plane entity, and is mainly responsible for user authentication, authorization and subscription checking, user mobility management, packet data network (PDN) connection, bearer maintenance, paging triggering in a user IDLE state, and other functions. A serving gateway (S-GW) is a core network user plane function entity, and is mainly responsible for an interaction with a PDN gateway (GW) in the case of roaming. The PDN GW (P-GW) is a core network user plane function entity and an access point which is used for the UE to access the PDN, is responsible for user Internet Protocol (IP) address allocation, network-triggered bearer establishment, modification and deletion, Quality of Service (QoS) control, charging and other functions, and is the anchor point of the user in the 3GPP system, and thus the IP address is ensured to be unchanged and service continuity is ensured. In a control and forwarding separation architecture, the P-GW is further divided into two parts. One is a packet data network gateway control entity (PGW-Control, PGW-C), and another is a packet data network gateway user plane entity (PGW-User, PGW-U). The PGW-C is responsible for signaling control and the PGW-U is responsible for IP data forwarding. A home subscription server (HSS) stores subscription information of the user. A policy and charging control function (PCRF) is responsible for formulating policy decisions and charging rules. The PCRF provides network control rules based on service data flows. The network control includes service data flow detection, gating control, QoS control, a charging rule based on data flows, and the like. The PCRF transmits the policies and charging rules formulated by the PCRF itself to the P-GW for execution. The 3GPP began researching the NextGen System (5GS) from Release 14 (R14). The NextGen System may support three types of services: evolved mobile broadband (eMBB), massive machine type communication (mMTC), and ultra reliable machine type communication (uMTC), which have different network characteristics. FIG. 2 is a schematic diagram of a NextGen mobile communication network architecture in the related art, the functions of the various network elements are described below. The UE is accessed to the network and obtains services mainly via a NextGen wireless air interface. The UE interacts with a base station via the air interface, and interacts with a common control plane function and a session control plane function of the core network via the NAS signaling. A NextGen radio access network (NG RAN) base station is responsible for the air interface resource scheduling and air interface connection management of the network to which the UE is accessed to. The NG RAN base station may adopt a new radio (NR) access technology (gNB) or an evolved LTE technology (eLTE). A session management function (SMF) interacts with the UE, and is mainly responsible for processing requests of user packet data unit (PDU) session (PDU session) establishment, modification and deletion, selecting user plane functions (UPF), establishing a user plane connection between the UE and the UPF, determining session QoS parameters together with a policy control function (PCF), and the like. Each PDU session of the UE has a corresponding SMF, and different PDU sessions may have different SMFs. An access and mobility control function (AMF) is a common control plane function in the core network. A user has only one AMF. The one AMF is responsible for user authentication, authorization, and subscription checking to ensure that a user is a legitimate user and for user mobility management, including location registration and temporary identifier allocation. The one AMF is also responsible for selecting an appropriate SMF when the user initiates a PDU connection establishment request, forwarding the NAS signaling between the UE and the SMF, and forwarding access