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D2D communication method and device

A communication method and technology for user equipment, applied in the field of D2D communication methods and equipment, can solve problems such as resource conflicts, and achieve the effects of avoiding resource conflicts and reducing overhead

Active Publication Date: 2015-11-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a D2D communication method and user equipment to solve the problem of resource conflict caused by resource competition in the existing D2D communication process

Method used

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Embodiment Construction

[0058] The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] The D2D communication method provided by the embodiment of the present invention is as follows: figure 1 As shown, it specifically includes the following operations:

[0060] Step 100: Send a preamble on the set of sub-channels in the contention area, and monitor the preamble on the set of sub-channels in the contention area.

[0061] Wherein, what is monitored is the preamble sent by other D2D UEs.

[0062] Wherein, the preamble can be monitored not only through energy detection, but also through sequence correlation detection.

[0063] Step 110, if no preamble is detected on the subchannel set in the contention area, send data on the subchannel set in the data area corresponding to the subchannel set in the contention area.

[0064] In this embodiment of the present invention, the subchannel set inclu...

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Abstract

Disclosed are a D2D communication method and device. The method comprises: sending a preamble on a sub-channel set of a competition region, and monitoring the preamble on the sub-channel set of the competition region; and if the preamble is not monitored on the sub-channel set of the competition region, sending data on a sub-channel set of a data region corresponding to the sub-channel set of the competition region, different sub-channel sets of the competition region corresponding to different sub-channel sets of the data region. The technical solution provided in the embodiments of the present invention can effectively avoid the resource conflict of a D2D UE. In addition, since a preamble occupies less resources, competing for sub-channel resources of a data region by sending a preamble could effectively reduce the overhead of resource competition.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a D2D communication method and device. Background technique [0002] Device-to-Device (Device-to-Device, D2D), that is, terminal direct technology, refers to the way that adjacent user equipment (UserEquipment, UE) can transmit data through a direct link within a short distance without going through the center The node (that is, the base station) performs forwarding. [0003] In the research of D2D, the following four scenarios are mainly considered, and each scenario can appear in combination: [0004] Out of coverage (OutofCoverage) scenario: both UE1 and UE2 are out of coverage; [0005] Partial coverage (PartialCoverage) scenario: UE1 is within the coverage of the cell (InCoverage), UE2 is outside the coverage of the cell; [0006] Single-cell coverage (InCoverage-Single-Cell) scenario: UE1 and UE2 are within the coverage of the same cell; [0007] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W74/08H04W72/54
CPCH04W74/08H04W74/0816H04W76/14H04L5/0044H04L5/0053H04W74/002H04W84/042
Inventor 赵锐高秋彬陈文洪彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD
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