Cognitive wireless sensor network QoS guarantee opportunity routing method based on directional antenna

A sensor network, directional antenna technology, applied in network planning, network topology, wireless communication and other directions, can solve problems such as not fully applicable

Active Publication Date: 2018-11-30
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of the cognitive radio network itself and the energy limitation of sensor nodes, the traditional wireless network routing design method cannot be fully applied to the CRSN environment

Method used

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  • Cognitive wireless sensor network QoS guarantee opportunity routing method based on directional antenna
  • Cognitive wireless sensor network QoS guarantee opportunity routing method based on directional antenna
  • Cognitive wireless sensor network QoS guarantee opportunity routing method based on directional antenna

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Embodiment Construction

[0063] Below in conjunction with accompanying drawing, the technical scheme of the present invention is described in further detail:

[0064] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as herein, are not to be taken in an idealized or overly formal sense. explain.

[0065] Most of the current CRSN is aimed at time multiplexing, that is, cognitive sensor nodes access idle licensed spectrum when the PU is inactive, and another possible solution to increase the benefit of CRSN is to use spatial multiplexing. As an effective way to realize spatial multiplexing in...

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Abstract

The invention discloses a cognitive wireless sensor network QoS guarantee opportunity routing method based on a directional antenna, and belongs to the field of combination of the directional antennaand a cognitive wireless sensor network routing. The method of the invention comprises the following steps: firstly, analyzing the influence of directional antenna adjustment on spectrum access and routing selection; secondly, modeling an antenna system and a network model, and proposing a joint optimization problem of an antenna sector, a transmission channel and the routing selection on the basis; then, proposing an approximation scheme and a heuristic algorithm to select the antenna sector and the channel for data transmission, and to create a candidate forwarding node list; and finally, performing a simulation experiment and result analysis. By adoption of the cognitive wireless sensor network QoS guarantee opportunity routing method disclosed by the invention, the cognitive wireless network environment in which the available spectrum dynamically changes is well adapted to, and QoS guarantee with high reliability, low energy consumption and low delay is provided.

Description

technical field [0001] The invention relates to an opportunistic routing mechanism for QoS guarantee of a cognitive wireless sensor network, and belongs to the field of combining a directional antenna and a cognitive wireless sensor network routing. Background technique [0002] Most existing wireless sensor networks operate in unlicensed ISM frequency bands, but with the proliferation of new generation wireless devices, these public unlicensed frequency bands are becoming increasingly crowded. In order to alleviate the above problems, CRSN (Cognitive Radio Sensor Networks, cognitive wireless sensor networks) capable of realizing dynamic spectrum access emerges as the times require. In CRSN, sensor nodes can opportunistically occupy these idle licensed spectrums (channels) as long as they do not interfere with PU (Primary User, primary user) communication. Once the PU signal returns, the node needs to leave the frequency band immediately and look for a new spectrum access o...

Claims

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Application Information

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IPC IPC(8): H04W16/22H04W28/24H04W40/06H04W40/12H04W40/14H04W84/18
CPCH04W16/22H04W28/24H04W40/06H04W40/12H04W40/14H04W84/18Y02D30/70
Inventor 白光伟王露沈航李灵俐周凌宇
Owner NANJING UNIV OF TECH
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