Inter-cell D2D communication method, UE and base station

Abstract

The invention discloses an inter-cell D2D communication method, UE and a base station. The inter-cell D2D communication method includes the following steps that first UE in a first cell obtains information of a second cell. The information of the second cell includes the D2D communication frequency and a cell ID of the second cell; a downlink synchronizing signal of the second cell is searched for by the first UE on the D2D communication frequency of the second cell according to the cell ID of the second cell to obtain downlink timing of the second cell; the first UE determines sending timing of a message sent to the second UE in the second cell according to the downlink timing of the second cell; the first UE sends the message according to the sending timing on the D2D communication frequency of the second cell and receives a message sent by the second UE on the D2D communication frequency of the first cell. By means of the inter-cell D2D communication method, the user equipment and the base station, inter-cell D2D communication can be achieved.

Description

technical field [0001] The present invention relates to the field of communication, and more specifically, to a method for D2D communication between cells, a user equipment and a base station. Background technique [0002] In the past 20 years, wireless communication technology has achieved great development, and wireless communication technology is also emerging in an endless stream. With its great flexibility, wireless communication network is increasingly occupying people's life and becoming an indispensable part of people's life. [0003] However, wireless spectrum resources are limited. With the rapid increase of the number of people using wireless communication networks and the increasing requirements for wireless communication network performance, the shortage of spectrum resources has become the key to limit wireless communication performance. At present, the cellular network is the main wireless communication network. In this communication, the communication betwee...

AI Technical Summary

Problems solved by technology

[0006] When the distance between two UEs (User Equipment, user equipment) located at the edge of two cells is very close, the channel state between the two UEs is very good, and at this time the two UEs can obtain very good communication quality through D2D communication; on the contrary , because the two UEs are far away from their respective serving base stations, the channel quality between the two UEs and their respective serving base stations is very poor, and the signal fading is very large. At this time, it is not a good choice for cellular communication

However, D2D communication between cells cannot be realized due to the difference in D2D communication frequency or frame timing structure between neighbors.

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