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A method and device for realizing time-frequency synchronization of d2d terminals

A technology for user equipment and synchronization signals, used in synchronization devices, pilot signal distribution, machine-to-machine/machine-type communication services, etc. Effect

Active Publication Date: 2021-06-18
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, how to solve the terminal synchronization problem in the D2D mutual discovery in the PC and OC scenarios in a backward compatible way, there is no ideal solution at present

Method used

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  • A method and device for realizing time-frequency synchronization of d2d terminals
  • A method and device for realizing time-frequency synchronization of d2d terminals
  • A method and device for realizing time-frequency synchronization of d2d terminals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment is aimed at a PC scenario, that is, UEs participating in D2D mutual discovery include ICUEs and OCUEs. When the ICUE meets the D2DSS sending condition, it sends the D2DSS and PSBCH. Among them, the resources occupied by D2DSS and PSBCH are the same as the resources occupied by Rel-12 broadcast communication UEs to send D2DSS and PSBCH, and the value range of D2DSS ID is different from that of Rel-12 D2D UEs, so as to ensure the participation in D2D mutual discovery in PC scenarios The D2DSS sent by the UE and the DMRS of the PSBCH are orthogonal to the corresponding signals sent by the Rel-12 D2D UE. The specific implementation steps are as follows:

[0059] Step 210: The ICUE obtains the configuration of synchronization resources in the cell, and sends information such as the configuration of synchronization signal trigger conditions, the configuration of D2DSS and PSBCH, and the configuration of D2D mutual discovery resources.

[0060] The configurat...

Embodiment 2

[0077] This embodiment is aimed at a PC scenario, that is, UEs participating in D2D mutual discovery include ICUEs and OCUEs. When the ICUE meets the D2DSS sending condition, it sends the D2DSS and PSBCH. The resources occupied by D2DSS and PSBCH are the same as the resources occupied by Rel-12 broadcast communication UEs to send D2DSS and PSBCH, the D2DSS sequence used by ICUE is the same as the D2DSS sequence sent by Rel-12 D2D terminals, and the demodulation reference signal of PSBCH adopts The sequence of is orthogonal to the demodulation reference signal sequence of the PSBCH sent by the Rel-12 broadcast communication UE. The specific implementation steps are as follows:

[0078] Step 310: The ICUE obtains the configuration of synchronization resources in the cell, and sends information such as the configuration of synchronization signal trigger conditions, the configuration of D2DSS and PSBCH, and the configuration of D2D mutual discovery resources.

[0079] The config...

Embodiment 3

[0093] This embodiment is aimed at a PC scenario, that is, UEs participating in D2D mutual discovery include ICUEs and OCUEs. When the ICUE meets the D2DSS sending condition, it sends the D2DSS and PSBCH. The resources occupied by the D2DSS and the PSBCH are different from the resources occupied by the Rel-12 broadcast communication UE for sending the D2DSS and the PSBCH. The value range of the D2DSS ID is still different from that of the Rel-12 D2D UE to avoid false detection of the Rel-12 OCUE. The specific implementation steps are as follows:

[0094] Step 410: The ICUE obtains the configuration of synchronization resources in the cell, and sends information such as the configuration of synchronization signal trigger conditions, the configuration of D2DSS and PSBCH, and the configuration of D2D mutual discovery resources.

[0095] The configuration of the synchronization resource includes the location and period of the subframe used for D2DSS transmission. The trigger co...

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Abstract

This application proposes a method for achieving synchronization between D2D terminals. In the PC scenario, in order to participate in mutual discovery and realize mutual discovery between ICUE and OCUE, after the ICUE meets the trigger condition of D2DSS, the synchronization resources configured in the cell The D2DSS and PSBCH are sent on the Internet, and the same physical resources as the D2DSS and PSBCH sent by the Rel-12 D2D UE are multiplexed by means of code division, or the physical resources are different from those used by the Rel-12 D2D UE to send the D2DSS and PSBCH. Through this method, the impact on the Rel-12 D2D UE measurement can be effectively avoided, and at the same time, the system frame-level synchronization between the ICUE and the OCUE participating in mutual discovery in the PC scenario is realized with less complexity.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular, the present application relates to a method and device for realizing synchronization between D2D terminals in a D2D communication system. Background technique [0002] At present, D2D (Device to Device) communication technology has been accepted by 3GPP standards due to its great potential value in the field of public safety and ordinary civilian communication, and some functions have been standardized in 3GPP Rel-12, including cell Mutual discovery of D2D terminals in coverage scenarios and broadcast between D2D terminals in scenarios of In Coverage (IC), Partial Coverage (PC) and Out of Coverage (OC) communication. [0003] According to the current 3GPP conclusions, for UEs participating in D2D mutual discovery, in order to achieve subframe-level synchronization between D2D terminals in different cells, UEs that send D2D discovery signals need to The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W56/00
CPCH04W8/005H04W56/001H04W56/002H04W56/0015H04W72/30H04L5/005
Inventor 张世昌李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT