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A beam selection method for tdma ad hoc network based on directional antenna

A directional antenna and self-organizing network technology, applied in the field of communication, can solve the problems of inability to perform frequency reuse and increase node interference

Active Publication Date: 2018-10-30
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Most of the research on traditional self-organizing networks uses omnidirectional antennas, and the use of omnidirectional antennas will bring the following problems: 1. The use of omnidirectional antennas will increase inter-node interference; 2. Frequency reuse cannot be performed
[0004] 2. Due to the existence of reflection and multipath, multiple directional antenna beams will find the same neighbor node

Method used

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  • A beam selection method for tdma ad hoc network based on directional antenna
  • A beam selection method for tdma ad hoc network based on directional antenna
  • A beam selection method for tdma ad hoc network based on directional antenna

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Embodiment Construction

[0028] Taking the system with the number of directional antenna beams N=16 and the probability of probability P=1 / 4 as an example, the specific embodiments of the present invention are:

[0029] Step 1: Time synchronization of all nodes in the ad hoc network; wherein, each node is provided with 16 directional antennas forming 360° coverage, one directional antenna corresponds to one beam; 1 / 4 is used as an active scanning node, with a probability of 3 / 4 as a passive listening node;

[0030] Step 2: Divide the control part of a TDMA cycle into 16 time slots, and each time slot contains three sub-slots; among them, a TDMA cycle consists of a control part and a data part, and the control part is used for neighbor discovery and beam selection , the data part is used for data transmission;

[0031] Step 3: Number the 16 directional antennas, the beam aligned with the reference baseline direction of the electronic compass is defined as 1 beam, and the 16 directional antennas are nu...

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Abstract

The invention discloses a beam selection method of a TDMA ad hoc network based on a directional antenna. The present invention first performs time synchronization of the entire network, and then divides the neighbor discovery and beam selection phases into N (N is the number of directional antenna beams) time slots, and implements 3-way communication with nodes under the beam on each time slot. First handshake, in the beam scan, each scan records the maximum received power of the first handshake frame of each node, if the received power is less than the maximum received power of this scan recorded by the node, the handshake request will not be replied, otherwise the handshake frame will be replied 2, so as to realize the three-way handshake to complete the beam selection.

Description

technical field [0001] The invention relates to a beam selection method of a TDMA ad hoc network based on a directional antenna in the communication field. Background technique [0002] Most studies on traditional ad hoc networks use omnidirectional antennas, which will bring the following problems: 1. Using omnidirectional antennas will increase inter-node interference; 2. Frequency reuse cannot be performed. In the actual use of ad hoc network group communication equipment using directional antennas, multiple directional antenna beams may find the same neighbor node for the following two reasons: [0003] 1. In order to ensure that multiple directional antennas are used to achieve 360° coverage, the product of the beam width of the directional antenna and the number of directional antennas must be greater than 360°. When the neighbor node is located at the position where two directional antenna beams intersect and overlap, multiple The situation that multiple directional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08H04B7/212H04B7/26
CPCH04B7/0695H04B7/088H04B7/212H04B7/265
Inventor 郑博文倪光华张航姜晓斐于晓磊王欣羽吕先望赵阳
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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