Method for keeping specific service of user after cell switching failure and user equipment (UE)

Abstract

The invention discloses a method for keeping a specific service of a user after cell switching failure and user equipment (UE). The method comprises the following steps of: sending a link releasing message to a network attached storage (NAS) layer of the UE when judging that a reason for initiating a radio resource control (RRC) connection rebuilding message is switching failure after the RRC layer of the UE receives an RRC connection rebuilding refusing message in the process of rebuilding RRC connection; releasing all the existing specific bearing contexts after the NAS layer of the UE receives the message, transmitting a TAU request to a mobility management entity (MME), and reactivating default bearing; and sending a bearing resource modifying request message to the MME so as to applyfor building new specific bearing for the specific service after the NAS layer of the UE receives a TAU response returned from the MME and judges whether the service existing in the process of rebuilding the RRC connection is the specific service or not. By the technical scheme, the specific service of the user can be kept in the process of rebuilding the RRC connection after the UE switching failure.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and equipment for maintaining user-specific services after handover fails. Background technique [0002] A wireless network Long Term Evolution (LTE, Long Term Evolution) system adopts a flat network structure. figure 1 It is the structure diagram of LTE network. Such as figure 1 As shown, the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial RadioAccess Network) is composed of base stations (eNB, evolved NodeB), and the eNBs are interconnected by the X2 interface; the evolved packet core network (Evolved Packet Corenet work (EPC) includes a Serving Gateway (S-GW, Serving Gateway) and a Mobility Management Entity (MME, Mobility Management Entity), and interacts with the eNB through the S1 interface. Each eNB includes multiple cells. [0003] Mobility is the main feature in wireless communication systems, and it is...

AI Technical Summary

Problems solved by technology

However, in the case of handover failure, the re-establishment may also fail due to the uncertainty of cell selection. According to the protocol, the UE should directly enter the IDLE state at this time. As a result, the UE cannot continue to maintain the current state of any service. The user's manual follow-up operation restarts the previous business

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