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Fast device-to-device parallel discovery method

A device discovery and discovery method technology, applied in the communication field, can solve problems such as low discovery efficiency and slow response speed, and achieve the effects of improving efficiency, small discovery delay, and improving discovery efficiency

Pending Publication Date: 2022-05-06
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a fast device-to-device parallel discovery method to solve the existing technical problems of low device discovery efficiency and slow response speed

Method used

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  • Fast device-to-device parallel discovery method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: A fast device parallel discovery method, see figure 1 , in this embodiment, a single channel or all channels are divided into N (N is a positive integer) sub-channels, and 4 sub-channels are taken as an example in this embodiment. The basic process of D2D device discovery includes a requirements collection stage and a device discovery stage, wherein the device discovery stage and the requirements collection stage can be performed in cascade or independently.

[0045] (1) D2D device discovery requirements collection stage:

[0046] Step 1: The AP sends a D2D Discovery Request Trigger frame on all channels to initiate the collection of D2D device discovery trigger frames.

[0047] Step 2: The STA that needs to discover the D2D device randomly selects a subchannel to send a Request STA frame to feed back the demand information. In this embodiment, two stations STA1 and STA2 randomly select subchannels 1 and 3 respectively to send Request STA1 and Request ST...

Embodiment 2

[0055] Embodiment two: see image 3 , the difference from Embodiment 1 is that the single channel in the scenario of Embodiment 1 is extended to multiple channels, and each channel is divided into 4 sub-channels to further improve the efficiency of device discovery. The specific discovery process of multi-channel D2D device discovery is described as follows:

[0056] Step 1: The AP sends the same data packet D2D Discovery Search Schedule frame on the primary channel and secondary channel (multiple secondary channels) at the same time, which is used to instruct the STA to be discovered by the device to send its Discovery Search STA frame in the specified order.

[0057] Step 2: The scheduled station Authorized STAs send DiscoverySearch STA1 and Discovery Search STA2 frames on the primary channel and secondary channel respectively in the specified time sequence according to the information indicated in the D2D Discovery Search Schedule frame.

[0058] Step 3: The AP sends the T...

Embodiment 3

[0062] Embodiment three: see Figure 4 , to extend the network coverage of a single cell (BSS) to the network coverage of multiple cells, and allow D2D discovery of devices in other cells. The specific process of D2D discovery of devices in the physical scenario of multi-cell network coverage is as follows:

[0063] Step 1: The AP sends a D2D Discovery Search Schedule frame on all channels, which is used to indicate the order in which the STAs to be discovered by the device send their Discovery Search STA frames.

[0064] Step 2: According to the information indicated in the D2D Discovery Search Schedule frame, the scheduled STAs successively send Discovery Search STA frames on all channels to reply to the D2D Discovery Search Schedule frame sent by the AP.

[0065] Step 3: The Trigger Discovery Response frame sent by the AP on all channels is used to trigger device discovery, including the number of sub-channels and the number of Response rounds; at the same time, it plays th...

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Abstract

The invention discloses a rapid device-to-device parallel discovery method, and aims to solve the technical problems of low efficiency and slow response speed of existing device discovery. According to the invention, the equipment discovery process is scheduled by the access point AP, and the equipment discovery processes of a plurality of stations (STA) are carried out in the same process, so that the equipment discovery efficiency is improved. In the embodiment of the invention, the site device sends a device discovery block response frame in an OFDMA (Orthogonal Frequency Division Multiple Access) mode, a plurality of site devices can be replied in one block response frame at the same time, the discovery efficiency is further improved, in order to ensure that the block response frame is synchronously sent, all the site devices are synchronized with the AP, and the AP feeds back a final D2D device discovery result. The method has the advantages of being high in discovery efficiency, high in speed and simple in process.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a fast device-to-device parallel discovery method. Background technique [0002] D2D (device to device) communication is the communication between devices. It is an important technology. It has the advantages of improving spectrum utilization, network capacity and communication delay. It is applied to wireless local area network (WLAN) In China or in the Internet of Things (IoT) has great advantages. D2D device discovery is the basis for realizing D2D communication. D2D device discovery is a process in which devices with D2D communication requirements realize mutual recognition and form a neighbor relationship through a certain technology or frame interaction process. Therefore, an efficient D2D device discovery method is needed. [0003] Orthogonal Frequency Division Multiple Access (OFDMA) technology is to divide the channel into multiple sub-channels, each sub-channel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/70H04W8/00H04L5/00
CPCH04W4/70H04W8/005H04L5/0053
Inventor 李勇马新明高淼张娟娟席磊许鑫乔红波郑光汪强
Owner HENAN AGRICULTURAL UNIVERSITY