RRC (radio resource control) connection reestablishment method, device and system

Abstract

The invention relates to the field of communication, and discloses an RRC (radio resource control) connection reestablishment method, device and system which are used for providing a corresponding method and a corresponding process for the implementation of RRC connection reestablishment on a base station side. The method is implemented by that an RRC layer on the base station side sends a primitive for RRC connection reestablishment to each protocol layer of a local bottom layer in different modes according to reasons for triggering the RRC connection reestablishment and different reestablishment objects so as to indicate each protocol layer to reestablish a signaling link, thereby realizing the RRC connection reestablishment, perfecting related processes concerning the RRC connection reestablishment in protocols, realizing the restoration of the signaling links, and ensuring the stability and reliability of communication. The invention also discloses an RRC connection reestablishment device and an RRC connection reestablishment system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for reestablishing an RRC connection. Background technique [0002] In the existing LTE system, when the UE needs to communicate with the network, it first establishes an RRC connection, that is, establishes a signaling link 1 (Signalling Radio Bearers1, SRB1). Afterwards, through the initial security activation process, the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer is started to protect the integrity of the RRC signal and encrypt the data. After the initial security activation is successful, a service link (Data Radio Bearer, DRB) is established. [0003] When one of the following situations occurs, the UE can initiate the RRC connection re-establishment process: [0004] 1) The UE discovers a radio link failure; [0005] 2) The switching process fails; [0006] 3) Integrity verification failed; [0007] 4)...

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Problems solved by technology

[0005]2) The switching process failed;

[0013]The existing protocol describes the implementation process of RRC connection re-establishment from the perspective of UE, but for the operations performed by the base station during RRC connection re-establishment, the protocol The scheme and principle of processing are not described in the document, and the specific implementation method is not given

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