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Method and device for transmitting and receiving signals in a terminal-to-terminal d2d system

A terminal communication and terminal technology, applied in the field of communication, can solve problems such as waste of power

Active Publication Date: 2020-08-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] The present invention provides a method and device for transmitting and receiving signals in a terminal-to-device D2D system. The method and device provided by the present invention solve the problem of uniformly using the PSSCH channel to carry the communication signal and the discovery signal in the scenario of no network coverage in the prior art. There is a problem of wasting power

Method used

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  • Method and device for transmitting and receiving signals in a terminal-to-terminal d2d system
  • Method and device for transmitting and receiving signals in a terminal-to-terminal d2d system
  • Method and device for transmitting and receiving signals in a terminal-to-terminal d2d system

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Experimental program
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Embodiment 1

[0086] Such as figure 1 As shown, the embodiment of the present invention provides a signal transmission method in a device-to-device D2D system, where a first user equipment communicates with a second user equipment in a D2D manner, and the method includes:

[0087] Step 101, the first user equipment carries distinguishing information on the physical sidelink control channel (PSCCH), and the distinguishing information is used to indicate the physical sidelink shared channel (PSSCH) corresponding to the physical sidelink control channel (PSCCH) The signal carried is a terminal-to-device communication signal (D2D communication) signal or a non-device-to-device communication (D2D communication) signal;

[0088] In the embodiment of the present invention, the non-device-to-device communication signal may be a device-to-device discovery (D2D discovery) signal.

[0089] Step 102, sending the physical sidelink control channel (PSCCH) to the second user equipment.

[0090] In addit...

Embodiment 2

[0094] In this embodiment, the scheduling assignment (SA) corresponding to the PSCCH can be used to carry the distinguishing information, then carrying the distinguishing information on the PSCCH includes:

[0095] Set specific information in the SA corresponding to the PSCCH, and use the specific information to carry the distinguishing information.

[0096] method one

[0097] When the distinguishing information is only used to distinguish the signal carried by the PSSCH as a terminal-to-device communication signal (D2D communication) signal or a non-device-to-device communication (D2D communication) signal, then specific information with a length of 1 bit can be added to the SA to distinguish discovery and communication. The specific implementation can be the structure shown in Table 3:

[0098]

[0099]

[0100] table 3

[0101] In this implementation, the added specific information is Diff.D / C, because only two types need to be distinguished, so Diff.D / C=0 can be ...

Embodiment 3

[0120] Use the information included in the PSCCH to carry distinguishing information, because the PSCCH includes multiple information and multiple information processing methods, so the specific implementation of carrying distinguishing information on the PSCCH can also be multiple, specifically:

[0121] method one:

[0122] Carry the distinguishing information on the demodulation pilot (DMRS), scrambling code or cyclic redundancy check code (CRC) corresponding to the physical sidelink control channel (PSCCH), directly distinguish the discovery information and the communication information, and can further Distinguish between different discovery types and modes. The specific implementation can be:

[0123] 1. In this embodiment, distinguishing information is carried on the scrambling code corresponding to the PSCCH, and the specific implementation may be:

[0124] Setting the type and / or mode of the device-to-device discovery signal or the cell ID (cell ID) and / or user equi...

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PUM

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Abstract

The present invention discloses a method and device for transmitting and receiving signals in a terminal-to-device D2D system. The method includes: a first user equipment communicates with a second user equipment in a device-to-device D2D manner, and the first user equipment is controlled on the physical side. The channel PSCCH carries distinguishing information, and the distinguishing information is used to indicate that the signal carried by the physical sidelink shared channel PSSCH corresponding to the physical sidelink control channel PSCCH is a terminal-to-device communication signal or a non-device-to-device communication signal; The second user equipment sends the physical sidelink control channel PSCCH. The method disclosed in the present invention is used to solve the problem of wasting power in the prior art when the PSSCH channel is uniformly used to carry the communication signal and the discovery signal in the scenario of no network coverage.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a method and device for transmitting and receiving signals in a terminal-to-device D2D system. Background technique [0002] Device to Device (D2D) is an end-to-end direct communication technology. The biggest difference from the traditional cellular communication technology is that the communication between terminals no longer requires the transfer of the base station to communicate directly. , the base station can perform resource configuration, scheduling, coordination, etc., and assist terminals in direct communication. [0003] In the third generation partnership project services and system aspect (3GPP SA1), the application scenarios of Long Term Evolution-device-to-device (LTE-D2D) are divided into 2 Category: public safety and commercial applications. Public safety refers to earthquakes or emergencies, and if the cellular network cannot work normall...

Claims

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Application Information

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IPC IPC(8): H04W48/16H04W8/14
CPCH04W8/14H04W48/16Y02D30/70
Inventor 刘德平赵振山
Owner HUAWEI TECH CO LTD