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A signal sending and receiving method and device

A signal transmission and signal technology, applied in the field of communication, can solve problems such as different CP types, signal overlap, interference, etc.

Active Publication Date: 2018-07-20
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, UE1 and UE2 use subframes in the same resource pool to send D2D signals, but their CP types are different, and the signals between them are not orthogonal by Orthogonal Frequency Division Multiplex (OFDM). severe disturbance
At the same time, if the last symbol of the D2D signal sent by UE2 has no GP, and UE1 just sends the cellular signal on the adjacent cellular subframe after the D2D subframe, since the timing of the D2D signal is sent according to the downlink timing, and the cellular signal The timing is advanced, and their signals will overlap, resulting in mutual interference

Method used

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  • A signal sending and receiving method and device
  • A signal sending and receiving method and device
  • A signal sending and receiving method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0213] Embodiment 1: Both the first UE and the second UE are D2D UEs within network coverage, the first UE sends a discovery signal, and the second UE discovers the first UE through the discovery signal.

[0214] The first UE determines the CP type configuration used by its own discovery signal, and the CP type configuration is notified to each UE through broadcast signaling by the eNB. It is assumed that the CP type of the first UE is configured as a normal CP.

[0215] The first UE uses 1-bit CP indication information in the synchronization channel (PD2DSCH) to indicate the CP type used by its discovery signal; where 0 indicates a regular CP, 1 indicates an extended CP, and the current indication information is 0. Both the signal in the synchronization channel and the corresponding synchronization signal are generated and sent using a predefined CP type, which is assumed to be an extended CP. At the same time, the synchronization channel also indicates the physical resource...

Embodiment 2

[0220] Embodiment 2: the first UE is a D2D UE within network coverage, and the second UE is a D2D UE outside network coverage, wherein the first UE sends a D2D broadcast communication signal, and the second UE receives a D2D broadcast communication signal.

[0221] The first UE determines the GP configuration used by its own broadcast communication signal according to its own network coverage. Since the first UE is within the coverage of the network, the GP used by it to broadcast the communication signal is a GP with a length of one OFDM symbol, and it is the last symbol of the subframe.

[0222] The first UE implicitly indicates the GP configuration used for the broadcast communication signal through the synchronization source information and resource configuration information carried in the synchronization channel (PD2DSCH), and does not carry independent GP indication information in the synchronization channel. The first UE sends synchronization source information and reso...

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Abstract

Disclosed are a signal sending and receiving method and device, which are used to enable a receiving end UE to learn the signal format configuration of a signal sent by a sending end UE, so that when signal detection is conducted, there is no need to traverse different signal format configurations and respectively conduct detection, and therefore, the complexity of received signal detection can be effectively reduced. The signal sending method provided in the present application comprises: determining, by a first UE, the signal format configuration of a signal which needs to be sent to a second UE; according to the signal format configuration, determining, by the first UE, signal format indication information which needs to be carried in a synchronization channel; when determining that it is necessary to carry the signal format indication information in the synchronization channel, sending, by the first UE, the signal format indication information to the second UE via the synchronization channel; and according to the signal format configuration, generating, by the first UE, the signal which needs to be sent to the second UE, and sending same to the second UE.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a signal sending and receiving method and device. Background technique [0002] Device-to-Device (D2D) communication technology, that is, terminal direct technology, refers to the way that adjacent terminals can transmit data through direct links within a short distance without passing through central nodes (ie, base stations). ) for forwarding, such as figure 1 shown. The short-distance communication characteristics and direct communication mode of D2D technology make it have the following advantages: [0003] The terminal short-distance direct communication method can achieve higher data rate, lower delay and lower power consumption; [0004] Utilizing the widely distributed user terminals in the network and the short-distance characteristics of the D2D communication link, the effective use of spectrum resources can be realized; [0005] The D2D direct communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W8/14H04W24/00H04W56/00
CPCH04W88/04
Inventor 陈文洪高秋彬赵锐彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD