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Method and equipment for realizing time and frequency synchronization between D2D (Device to Device) terminals

A time-frequency synchronization and terminal technology, applied in the field of mobile communication, can solve problems such as no solution, and achieve the effect of avoiding the influence of measurement and reducing complexity

Active Publication Date: 2016-12-07
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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  • Method and equipment for realizing time and frequency synchronization between D2D (Device to Device) terminals
  • Method and equipment for realizing time and frequency synchronization between D2D (Device to Device) terminals
  • Method and equipment for realizing time and frequency synchronization between D2D (Device to Device) terminals

Examples

Experimental program
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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. 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-12D2D UEs, so as to ensure that UEs participating in D2D mutual discovery in PC scenarios The transmitted D2DSS and PSBCH DMRS are orthogonal to the corresponding signals transmitted by the Rel-12D2D 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 configuration of the synch...

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 D2DSSID is still different from that of the Rel-12D2D UE to avoid false detection of the Rel-12OCUE. 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 condi...

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Abstract

The invention provides a method for realizing synchronization between D2D (Device to Device) terminals. Under a PC (Personal Computer) scene, after ICUE (In Coverage User Equipment) meets trigger conditions of a D2DSS (Device to Device Synchronization Signal), the D2DSS and a PSBCH (Physical Sidelink Broadcast Channel) are sent on synchronization resources configured on a cell and multiplexing the same physical resources with a D2DSS and a PSBCH which are sent by Rel-12D2D UE through a code division way or occupy the physical resources different from the physical resources of the D2DSS and the PSBCH which are sent by the Rel-12 D2D UE in order to realize the mutual discovery between the ICUE and OCUE (Out of Coverage User equipment) which participate in the mutual discovery. Through the method, the influence on Rel-12 D2D UE measurement can be effectively avoided, and meanwhile, the system-frame-level synchronization between the ICUE and the OCUE which participate in the mutual discovery under the PC scene is realized at the smaller 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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IPC IPC(8): H04W4/00H04W56/00
CPCH04W8/005H04W56/001H04W56/002H04W56/0015H04W72/30H04L5/005
Inventor 张世昌李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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