Method, base station, equipment and system for recovering connection of inactive terminal

Abstract

The embodiment of the invention provides a method, a base station, equipment and a system for recovering connection of an inactive terminal. The method comprises the following steps: after receiving an RRC connection recovery request sent by an inactive terminal, allocating an interface signaling connection identifier and transmission layer configuration information to the terminal; Sending a request for obtaining the context of the access layer of the terminal to the core network device, the request carrying the interface signaling connection identifier and the transmission layer configuration information, so that the core network device obtains the context of the access layer from the anchor base station, and distributes the transmission layer configuration information for the wireless access bearing in the wireless access bearing list; Receiving response information sent by the core network device, establishing NG interface signaling connection of the terminal according to the interface signaling connection identifier and the transmission layer configuration information, and recovering the wireless access bearer in the wireless access bearer list; And sending an RRC connection recovery instruction to the terminal, so that the terminal recovers the RRC connection. According to the embodiment of the invention, air interface signaling and interface signaling are reduced, and network congestion is avoided.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method, base station, device and system for resuming connection of an inactive terminal. Background technique [0002] At present, in the 5G wireless system (New Radio, NR) system research, the radio resource control inactive state (Radio Resource Control Inactive, RRC_INACTIVE, hereinafter referred to as the INACTIVE state) has been introduced. An important feature of the INACTIVE state is that this state The RRC connection of the terminal equipment (User Equipment, UE) is released, but its Access Stratum (AS) context is saved in the last serving base station (also called anchor base station: anchor gNB) before the connection release. The difference between the INACTIVE state and the RRC_IDLE state in the traditional LTE system is shown in Table 1: [0003] Table 1 RRC_IDLE state and RRC_INACTIVE state comparison table [0004] [0005] ...

AI Technical Summary

Problems solved by technology

When the number of UEs in the INACTIVE state is large, it is easy to cause air interface link and core network congestion.

[0010] from image 3 It can be seen that for the case where there is no interface between base stations, compared with the method of creating a new context, the number of signaling messages on the air interface is not increased, but the interface signaling between the base station and the core network increases by 3. Considering INACTIVE The number of UEs in the state is huge, which also greatly increases the signaling load and processing burden of the core network

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