Method and system for transferring sessions during interoperation of 5G and LTE

An interoperable and 5G technology, applied in the field of 5G and LTE interoperability, can solve the problems of poor session transfer effect, increased signaling interaction, and high signaling overhead, so as to improve business continuity and speed up the session transfer process.

Active Publication Date: 2020-06-30
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Since, according to the above process, a total of seven steps are required to complete the signaling interaction process of transferring a session. If the UE has multiple sessions that need to be transferred from 5GS to EPS, the signaling interaction will increase exponentially, resulting in high signaling overhead and session transfer. poor effect

Method used

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  • Method and system for transferring sessions during interoperation of 5G and LTE
  • Method and system for transferring sessions during interoperation of 5G and LTE
  • Method and system for transferring sessions during interoperation of 5G and LTE

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Embodiment 1

[0067] Such as figure 2 As shown, when a session is transferred from 5GS to EPC, the ATTACH attach request message carries the session transfer request and EPS bearer activation signaling to transfer at least one session from 5GS to EPC, that is, the session transfer signaling is combined to reduce the delay , thereby improving the efficiency of session transfer and ensuring business continuity, effectively improving user experience; among them, UE operates in dual registration mode or single registration mode without N26 interface, initially registers in 5GS, and enters EPS coverage Area. When the 5GS signal gradually weakens and the EPS signal gradually strengthens, it will trigger the interoperation between 5GS and EPS on the UE side. In addition, when there is no N26 interface, according to the 5G protocol, when interoperating from 5GS to EPS, this embodiment It mainly involves the UE initiating the ATTACH (attach) procedure.

[0068] At the same time, during the intero...

Embodiment 2

[0094] Such as Figure 4 As shown, when transferring a session from EPC to 5GS, the dual registration mode or single registration has no N26 interface, and the UE also needs to transfer the session from the source end (EPS) to the destination end (5GS). The session transfer request carries DNN, PDN Session ID and QoSFlow activation message to transfer at least one session from EPC to 5GS; that is, the session transfer signaling is combined to simplify the signaling interaction of the session transfer process, thereby reducing the delay , improve the efficiency of session transfer and ensure business continuity, effectively improving the effect of user experience. In this embodiment, specifically, the UE uses the SESSION TRANSFERREQUEST and ACTIVATE QOS FLOW procedures to transfer the session. Since the 5G protocol stipulates that a session cannot be established during the registration process, no matter whether it is registered in advance or not, the session cannot be transfe...

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Abstract

The invention provides a method and a system for transferring a session in an interoperation process of 5G and LTE. The method comprises the steps that interoperation between 5G and LTE is triggered,and in the interoperation process, at least one session is transferred between a 5G corresponding network and an LTE corresponding network through a session transfer request message and an EPS bearingactivation message or through the session transfer request message and a QoS Flow activation message. According to the invention, the session transfer process can be accelerated by reducing the signaling or simplifying the transfer process, so that the service continuity is improved.

Description

technical field [0001] The present invention relates to the technical field of interoperability between 5G and LTE, and in particular to a method and system for transferring sessions during the interoperation between 5G and LTE. Background technique [0002] Currently, the 5G protocol is being formulated, among which the concept of registration mode is newly introduced for the interoperability between 5GS and EPS. The registration modes in 5G are divided into single registration and dual registration. In single registration mode, UE maintains a single registration state in 5GS and EPS. In dual registration mode, UE maintains independent registration states in 5GS and EPS. In 5G, the N26 interface is used for the interoperability between 5GC and EPC. The N26 interface is the interface between AMF (Authentication Management Function: Authentication Management Function) and MME (Mobile Management Entity: Mobile Management Entity). Time transfer context. Even if there is no N2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/14H04W28/02H04W28/24
CPCH04W36/0022H04W36/0066H04W36/14H04W28/0268H04W28/24
Inventor 金逸陈伟
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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