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Centralized spectrum allocation method in underwater sensor network

An underwater sensor and spectrum allocation technology, applied in the field of spectrum allocation, can solve problems such as low network communication efficiency, achieve easy management and control, avoid data exchange, and improve performance

Inactive Publication Date: 2016-03-30
TIANJIN UNIV
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Problems solved by technology

This method requires the exchange of a large amount of channel selection information between nodes, resulting in low communication efficiency of the network.

Method used

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  • Centralized spectrum allocation method in underwater sensor network
  • Centralized spectrum allocation method in underwater sensor network
  • Centralized spectrum allocation method in underwater sensor network

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Embodiment Construction

[0015] In an underwater sensor network with multiple channels, each transceiver node pair needs to select a channel and negotiate before sending data, so as to achieve conflict-free communication between each transceiver node pair. This process can be divided into two stages. In the first stage, each sending node sends its own channel selection information to the central node, such as figure 1 In the second stage, the central node judges whether there is a conflict according to the channel selection information, and re-allocates the channel for the conflicting node, and broadcasts the final allocation result without conflict to all the sending and receiving nodes. figure 2 shown. These two stages are now described in detail.

[0016] The first stage: Each pair of sending and receiving nodes selects the channel they use, and notifies the central node. This work is mainly performed by the sending node in each pair of sending and receiving nodes. The sending node selects a ch...

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Abstract

The invention relates to a centralized spectrum allocation method in an underwater sensor network, which comprises: a channel is set as a common control channel and is used for carrying out channel selection and consultation between nodes; a center node is used for deciding a channel allocation condition and only carries out transmission of channel allocation information with other nodes; in order to guarantee only one transceiving node pair on one channel to carry out communication, the node pair needs to carry out channel selection and consultation before starting to send data; the nodes use a time slot structure when carrying out communication in the underwater sensor network, time slots have the same length, and the nodes can only send a message at a start moment of a certain time slot and are forbidden to send the message at other moments; and all sending nodes and receiving nodes need to have the same clock so as to keep whole network synchronization. According to the invention, under the condition of not transmitting a great volume of channel allocation information, the spectrum allocation method for conflict-free communication between each pair of communication nodes under the multi-channel condition can be realized.

Description

technical field [0001] The invention belongs to an underwater sensor network and relates to a frequency spectrum allocation method. Background technique [0002] Land wireless communication often uses electromagnetic waves as the transmission medium, but electromagnetic waves are severely attenuated in the underwater environment, so underwater sensor networks generally use acoustic waves as the communication medium. However, the sound wave spectrum that can be used for data transmission is very limited, only concentrated in the range of tens of kilohertz to hundreds of kilohertz. The channel bandwidth limits the transmission rate of the signal, which results in a low data transmission rate for underwater sensor networks. Therefore, scarce spectrum resources are the key factors limiting the development of underwater sensor networks. [0003] In the underwater sensor network with multiple channels, it is an effective method to solve the shortage of spectrum resources. Multi...

Claims

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Application Information

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