D2D switching method, system and device

Abstract

Embodiments of the present application relate to the technical field of wireless communication, in particular a D2D switchover method, system, and device, for solving the problem in prior art of the lack of mechanism for D2D switchover for D2D user devices under appropriate conditions so as to ensure the short-distance transmission quality in the situation where an LTE system has too high a load and interference is too strong. Embodiments of the present invention comprise: a network device determines, according to resource management information and / or channel status information whether a D2D user device needs to perform a D2D switchover; when the D2D user device is determined to need to perform a D2D switchover, the D2D user device is triggered to switch to a heterogeneous system and conduct end-to-end communication, or to conduct end-to-end communication via the network device, or to conduct in the current system end-to-end communication not controlled by the network device. The method in the embodiments of the present invention ensures that D2D devices can perform D2D switchover under appropriate conditions even when an LED system has too high a load and interference is too strong, thereby enhancing the end-to-end communication performance.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for D2D handover. Background technique [0002] In traditional cellular communication technology, the data communication process between two user equipments (UEs) is as follows: figure 1 shown. Services such as voice and data of the two user equipments interact through the eNB (evolved base station) where they reside and the core network. [0003] D2D (Device-to-Device), that is, user equipment direct technology, refers to the way that adjacent user equipment can transmit data through a direct link within a short distance without forwarding through a central node (ie, a base station). Such as figure 2 shown. The short-distance communication characteristics and direct communication mode of D2D technology make it have the following advantages: [0004] The user equipment short-distance direct communication method can achie...

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Problems solved by technology

[0011] The present invention provides a method, system and equipment for D2D handover, which are used to solve the problem in the prior art that when the LTE system load is too high and the interference is too large, there is no mechanism to make the D2D user equipment operate under reasonable conditions. Perform D2D switching to ensure the quality of short-distance transmission

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