Method, base station, device and system for resuming connection of inactive state terminal

Abstract

Embodiments of the present invention provide a method, a base station, a device, and a system for resuming a connection of an inactive terminal. The method includes: after receiving the RRC connection restoration request sent by the terminal in the inactive state, assigning the interface signaling connection identifier and transport layer configuration information to the terminal; sending a request to obtain the access layer context of the terminal to the core network device, and requesting to carry the interface Signaling connection identification and transport layer configuration information for the core network equipment to obtain the access layer context from the anchor base station, and allocate transport layer configuration information for the radio access bearers in the radio access bearer list; receive the response sent by the core network equipment Information, establish the NG interface signaling connection of the terminal according to the interface signaling connection identifier and the transport layer configuration information and restore the radio access bearer in the radio access bearer list; send an RRC connection restoration instruction to the terminal for the terminal to restore the RRC connection. The embodiment of the present invention reduces air interface signaling and interface signaling, and avoids causing network congestion.

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

Images