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D2D communication method and UE

A communication method and a technology for discovering signals, which are applied in the field of communication, can solve problems such as difficult timing synchronization, and achieve the effect of timing synchronization

Active Publication Date: 2015-07-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a D2D communication method and UE, so as to at least solve the problem in the related art that D2D discovers that it is difficult to realize timing synchronization of user equipment between cells

Method used

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  • D2D communication method and UE

Examples

Experimental program
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Embodiment 1

[0094] In this embodiment, the D2D UE directly detects the synchronization signal of the neighboring cell and obtains the D2D resource allocation information of the neighboring cell, that is, the resource allocation information corresponding to the D2D signal.

[0095] Figure 5 is a schematic diagram of the first implementation principle of D2D discovery signal communication according to a preferred embodiment of the present invention, as shown in Figure 5 As shown, Cell51, Cell52, and Cell53 are cells corresponding to different base stations, respectively, UE54, UE55, and UE56 are UEs belonging to the above three cells, respectively, and signal 57, signal 58, and signal 59 are downlink synchronization signals of the three cells, respectively, Signal 510 and signal 511 are downlink synchronization signals corresponding to Cell52 and Cell53 that UE54 can detect, and signal 512 and signal 513 are D2D discovery signals received by UE54 and corresponding to UE55 and UE56. Where...

Embodiment 2

[0101] In this embodiment, the D2D UE determines the receiving timing of the D2D discovery signal of the neighboring cell through the downlink synchronization signal forwarded by the UE of the neighboring cell.

[0102] Image 6 is a schematic diagram of the second implementation principle of D2D discovery signal communication according to a preferred embodiment of the present invention, as shown in Image 6 As shown, UE64 cannot detect the downlink synchronization signal of the neighboring cell, and needs to determine the receiving timing of the D2D discovery signal of the neighboring cell according to the downlink synchronization signal forwarded by the UE of the neighboring cell. exist Image 6 Among them, Cell61, Cell62, and Cell63 are cells corresponding to different base stations, UE64, UE65, and UE66 are terminals belonging to the above-mentioned three cells, respectively, and signal 67, signal 68, and signal 69 are downlink synchronization signals of the three cells, ...

Embodiment 3

[0135] In this embodiment, the D2D UE obtains the downlink synchronization signal of the neighboring cell by forwarding the downlink synchronization signal of the neighboring cell through the UE in the local cell, and then determines the receiving timing of the D2D discovery signal of the neighboring cell.

[0136] Figure 11 is a schematic diagram of a third implementation principle of D2D discovery signal communication according to a preferred embodiment of the present invention, as shown in Figure 11 As shown, UE113 can detect the downlink synchronization signals of neighboring cells Cell111 and Cell112, but UE114 cannot detect the downlink synchronization signals of neighboring cells Cell111 and Cell112.

[0137] UE113 respectively forwards the downlink synchronization signals of neighboring cells Cell111 and Cell112 on the corresponding uplink time-frequency resources in its corresponding serving cell. The forwarded signal is 1114 in the figure, and only one forwarded si...

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Abstract

The invention provides a D2D communication method and UE. The method includes the following steps: D2D UE in a first cell determines reception timing of a D2D finding signal in a second cell and obtains resource distribution information corresponding to the D2D finding signal and then receives the D2D finding signal according to the reception timing and the resource distribution information. Through the D2D communication method and the UE, a problem, which exists in a related technology, that during D2D finding, timing synchronization of all pieces of UE in cells is hard to realize so that an effect of timing synchronization of the pieces of UE in the cells during D2D finding is achieved.

Description

technical field [0001] The present invention relates to the communication field, and in particular, to a device-to-device (Device to Device, D2D for short) communication method and user equipment (User Equipment, UE for short). Background technique [0002] In a cellular communication system, when there is service transmission between two user equipments, for example, the service data from user equipment 1 (UE1) to user equipment 2 (UE2) is first transmitted to the base station (Base Station) of the cell where UE1 is located through the air interface. , or called Node B, or evolved (evolved) Node B), the base station transmits the user data to the base station of the cell where UE2 is located through the core network, and the base station of the cell where UE2 is located then transmits the above service data to UE2 through the air interface. figure 1 is a schematic diagram of cellular communication of UEs located in the same base station cell according to related technologie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/02H04W56/00
CPCH04W56/004H04W56/0065H04W72/0446H04W76/14
Inventor 黄双红吴栓栓王文焕杨瑾袁明
Owner ZTE CORP
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