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Spectrum allocation method to avoid nodes occupying channels for a long time in underwater sensor network

An underwater sensor, spectrum allocation technology, applied in the field of spectrum allocation, can solve problems such as loss of access channel fairness

Inactive Publication Date: 2019-10-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, other nodes will not be able to access this channel, losing the fairness of accessing the channel

Method used

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  • Spectrum allocation method to avoid nodes occupying channels for a long time in underwater sensor network
  • Spectrum allocation method to avoid nodes occupying channels for a long time in underwater sensor network
  • Spectrum allocation method to avoid nodes occupying channels for a long time in underwater sensor network

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Embodiment Construction

[0013] The frequency spectrum allocation method designed in the present invention is intended to prevent individual nodes from occupying a certain channel for a long time. The spectrum allocation process is mainly completed by the central node in the network. Before the central node allocates channels, each pair of nodes ready to communicate needs to send channel information. Specifically, the sending node in each pair of sending and receiving nodes needs to send each channel idle probability vector to the central node. The channel idle probability sent by the i-th pair of transceiver nodes is W i , as shown in formula (1),

[0014] W i =[p i1 ,p i2 ,p i3 ,...p iN ] (1)

[0015] where p ij is the probability that the i-th pair of transmitting and receiving nodes thinks that the j-th channel may be idle.

[0016] At the same time, the central node in the network saves the number of times the transceiver node pair accesses a certain channel, which is represented by the...

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Abstract

The invention relates to a frequency spectrum allocation method for avoiding long-term occupation of channels by nodes in an underwater sensor network. It is used in an underwater sensor network with a central node. The central node in the network saves the number of times each pair of nodes accesses each channel. In addition, the central node A fair vector is set for each node pair, and the element value in the fair vector is a function of the number of times the node pair accesses the channel. The invention can effectively reduce the interference of false information on frequency spectrum allocation, and avoid malicious nodes from occupying channels for a long time. The technical scheme of the present invention is as follows.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic communication and relates to a frequency spectrum allocation method. Background technique [0002] Underwater sensor network is a favorable tool for exploiting the ocean. In order to make full use of the scarce underwater spectrum resources, the concept of cognitive underwater acoustic communication came into being. In the underwater acoustic network using cognitive technology, the nodes can perceive the surrounding environment, so as to dynamically change their own working parameters to achieve the best match with the surrounding environment. There are primary nodes and secondary nodes in the cognitive underwater network. The main nodes are mainly underwater creatures, and they have the privilege of using the spectrum first. The secondary nodes are various artificial sensor nodes. When the primary users in the cognitive network do not use spectrum resources, the sensor nodes can ac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/08H04W72/54
CPCH04W72/53H04W72/542
Inventor 李雅婧金志刚苏毅珊
Owner TIANJIN UNIV