Opportunistic Routing Method for Cognitive Wireless Sensor Network QoS Guarantee

A cognitive wireless network and sensor network technology, applied in the field of cognitive wireless sensor network QoS guarantee opportunistic routing mechanism, can solve the problems that cannot be fully applied

Active Publication Date: 2021-09-10
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
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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

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Embodiment Construction

[0055] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0056] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms 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 commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

[0057] Most of the current CRSN is aimed at time multiplexing, that is, cognitive sensor nodes access the idle licensed spectrum when the PU is inactive, and another possible solution to increase the benefits of CRSN is to use spatial multiplexing. As an effective way to realize spatial multiplexing...

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Abstract

The invention discloses a QoS guarantee opportunistic routing method for a cognitive wireless sensor network based on a directional antenna, and belongs to the field of combining directional antennas and cognitive wireless sensor network routing. The method of the present invention includes the following steps: firstly, analyze the influence of directional antenna adjustment on spectrum access and routing; secondly, model the antenna system and network model, and propose antenna sector, transmission channel and Joint optimization problem for routing selection. Then, an approximation scheme and heuristic algorithm are proposed to select antenna sectors and channels for data transmission and create a list of candidate forwarding nodes. Finally, the simulation experiment and result analysis are carried out. The invention can well adapt to the cognitive wireless network environment where the available frequency spectrum changes dynamically, and provides QoS guarantee with high reliability, low energy consumption and low delay.

Description

technical field [0001] The invention relates to a QoS guarantee opportunistic routing mechanism for a cognitive wireless sensor network, and belongs to the field of combination of directional antennas and cognitive wireless sensor network routing. Background technique [0002] Most of the existing wireless sensor networks work in unlicensed ISM frequency bands, but with the popularization of new-generation wireless devices, these public unlicensed frequency bands become increasingly crowded. In order to alleviate the above problems, CRSN (Cognitive Radio Sensor Networks, Cognitive Radio Sensor Networks), which can realize dynamic spectrum access, came into being. In CRSN, as long as it does not interfere with PU (Primary User, primary user) communication, sensor nodes can opportunistically occupy these idle licensed frequency spectrums (channels). Once the PU signal returns, the node needs to evacuate the frequency band immediately and look for new spectrum access opportuni...

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Application Information

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Patent Type & Authority Patents(China)
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 TECH UNIV
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