Connection management method and device, terminal and base station in d2d relay communication

Abstract

The present invention provides a connection management method, apparatus, terminal and base station in D2D relay communication, wherein the connection management method in D2D relay communication, comprising: a remote terminal within the network coverage range when the RRC connection with the base station is not released, to determine whether to select a relay terminal for D2D relay communication; When determining that the trunk terminal is selected, according to the resource configuration mode used when the remote terminal performs D2D communication, it is determined whether it is possible to release the RRC connection between the base station and the base station. The technical solution of the present invention solves the problem of state transfer and connection management of UE in D2D relay communication, and avoids the problem of the remote terminal within the coverage in the resource pool configuration is insufficient and the scheduling resources are also transferred to the idle state when the scheduling resources are large, resulting in a decrease in the utilization rate of D2D communication resources.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular, to a connection management method in D2D relay communication, a connection management device in D2D relay communication, a terminal and a base station. Background technique [0002] 3GPP Release 13 began to introduce the discussion of partial coverage scenarios, and introduced D2D (Device-to-Device, device-to-device, which is the direct communication technology between devices introduced in 3GPP Release 12, which is realized by introducing secondary links instead of The uplink and downlink of the cellular network system realize the concept of relay), that is, two or more terminals performing D2D communication, some are located within the network coverage, and some are located outside the network coverage. Specific as figure 1 Shown is a schematic diagram of a partial coverage scenario. In this schematic diagram, a relaying UE (User Equipment, user equipment) can e...

AI Technical Summary

Problems solved by technology

Therefore, such UE state transition limits the resource flexibility of the remote UE when performing D2D communication.

Especially when the resource pool configuration is insufficient and there are many scheduling resources, it will lead to a decrease in the utilization rate of D2D communication resources.

[0004] Therefore, how to solve the state transition and connection management problems of remote terminals within the coverage, so as to avoid the low utilization rate of D2D communication resources, has become an urgent technical problem to be solved

Images