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Method for implementing mutual discovery of D2D terminal and terminal

A terminal and discovery cycle technology, applied in access restrictions, electrical components, wireless communication, etc., can solve problems such as no direct D2D

Inactive Publication Date: 2015-03-18
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective implementation method for direct D2D mutual discovery.

Method used

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  • Method for implementing mutual discovery of D2D terminal and terminal
  • Method for implementing mutual discovery of D2D terminal and terminal
  • Method for implementing mutual discovery of D2D terminal and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] In this embodiment, the maximum number of D2D terminals in the D2D group is 8, and the frequency domain width f of the discovery window is 4, that is, v=2. index) to determine the position for sending the discovery reference signal in each discovery cycle. It should be noted that in a discovery cycle, the D2D terminal should detect the discovery reference signals of other D2D terminals in the group during the period other than sending the discovery reference signal by the D2D terminal, which will not be repeated here. The implementation steps of mutual discovery of D2D terminals in this embodiment are as follows:

[0111] Step 510: The wireless network notifies the terminal which has just joined the D2D group of the ID of the current D2D group, the index of the terminal in the group, and the configuration of discovery reference signal resources of the current D2D group through signaling.

[0112] For ease of description without loss of generality, assume that the index...

Embodiment 2

[0130] In this embodiment, the maximum number of D2D terminals in the D2D group is 8, the frequency domain width f of the discovery window is 4, that is, v=2, and the D2D terminal determines the location to send the discovery reference signal by receiving signaling from the wireless network. It should be noted that in a discovery cycle, the D2D terminal should detect the discovery reference signals of other D2D terminals in the group during the period other than sending the discovery reference signal by the D2D terminal, which will not be repeated here. The implementation steps of mutual discovery of D2D terminals in this embodiment are as follows:

[0131] Step 610: The wireless network notifies the terminal which has just joined the D2D group of the ID of the current D2D group, the index of the terminal in the group, and the configuration of discovery reference signal resources of the current D2D group through signaling.

[0132] For ease of description without loss of gener...

Embodiment 3

[0153] In this embodiment, the maximum number of D2D terminals in the D2D group is 8, and the frequency domain width f of the discovery window is 4, that is, v=2. The position at which the discovery reference signal is sent determines the positions at which the discovery reference signal is sent several times in the current discovery cycle. It should be noted that in a discovery cycle, the D2D terminal should detect the discovery reference signals of other D2D terminals in the group during the period other than sending the discovery reference signal by the D2D terminal, which will not be repeated here. The implementation steps of mutual discovery of D2D terminals in this embodiment are as follows:

[0154] Step 710: The wireless network notifies the terminal which has just joined the D2D group of the discovery reference signal resource configuration of the D2D group through signaling.

[0155] For ease of description without loss of generality, assume that the time width of t...

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Abstract

The invention discloses a method for implementing mutual discovery of a D2D terminal. The method comprises the following steps: obtaining discovery reference signal resource configuration of the D2D terminal in a D2D group by the D2D terminal; determining a time-frequency position (where a discovery reference signal is transmitted) by the D2D terminal and sending the discovery reference signal in the time-frequency position. The invention also discloses a D2D terminal. By utilizing the method for implementing mutual discovery of the D2D terminal, the mutual discovery of the D2D terminal can be implemented in the absence of wireless network aid or only by virtue of the limited wireless network aid; the existing system is slightly changed; the compatibility of the system is not influenced; the method is simple and efficient to implement.

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 a terminal for realizing mutual discovery of D2D terminals. Background technique [0002] At present, the D2D (Device to Device) communication technology has been accepted by the 3GPP standard due to its great potential value in the field of public safety and ordinary civil communication, and has become a candidate evolution direction of the LTE-A (LTE Advanced) system. [0003] According to the current 3GPP conclusion, D2D terminals will use half-duplex mode for D2D communication. When D2D terminals are under wireless network coverage, D2D communication will only occupy uplink carrier frequency (FDD system) or uplink subframe (TDD system). [0004] In the process of D2D communication, the discovery of D2D terminals is the most important link. Only through this link can a certain communication initiating ter...

Claims

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Application Information

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IPC IPC(8): H04W48/16
CPCH04W8/005
Inventor 张世昌李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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