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UW-CSMA/CA based node quieting method for hydroacoustic network communication

An underwater acoustic network and node technology, applied in the direction of using the return channel for error prevention/detection, electrical components, transmission systems, etc., can solve the problems of reducing network throughput, long silent time of neighbor nodes, and easy interference with other node communications, etc.

Active Publication Date: 2015-02-11
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects that the silence method in the existing UW-CSMA / CA protocol will cause the neighbor nodes of the source node or the destination node to be silent for too long, reduce the network throughput, and easily interfere with the communication between other nodes, thereby providing A Node Quiet Method That Can Effectively Improve Network Throughput

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  • UW-CSMA/CA based node quieting method for hydroacoustic network communication
  • UW-CSMA/CA based node quieting method for hydroacoustic network communication
  • UW-CSMA/CA based node quieting method for hydroacoustic network communication

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Embodiment Construction

[0035] The present invention will be further described now in conjunction with accompanying drawing.

[0036] In the communication process of underwater acoustic network, the distance between nodes generally does not reach the maximum communication distance τ max , which makes a portion of the silent time unnecessary. According to the RTS-CTS handshake communication process, the actual propagation delay τ from the source node S to the destination node D can be calculated real :

[0037] τ real = RcevCTSTime - SendRTSTime - CTSDelay 2 - - - ( 1 )

[0038] Among them, SendRTSTime is the time of sending RTS, RecvCTSTime is the time of receiving CTS, and CTSDelay is the time difference between the time when the destination node D receives th...

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Abstract

The invention relates to a UW-CSMA / CA based node quieting method for hydroacoustic network communication. The method comprises the steps: in a hydroacoustic network, a neighbor node A surrounding a source node or destination node of a certain communication process monitors frames sent by other nodes in the hydroacoustic network, the quiet period of the node A is set to be max{Qlocal, QUIET_RTS} if xRTS is monitored, the quiet period of the node A is set to be max{Qlocal, QUIET_CTS} if xCTS is monitored, monitored xDATA is matched with current quiet period if the xDATA is monitored, the quiet period is reset to be QUIET_DATA if the xDATA is matched with the current quiet period, the quiet period is set to be max{Qlocal, QUIET_ DATA } if the xDATA is not matched with the current quiet period, xACK is matched with the current quiet period if the xACK is monitored, quieting is ended immediately if the xACK is matched with the current quiet period, and the quiet period is kept invariable if the xACK is not matched with the current quiet period.

Description

technical field [0001] The invention relates to the field of underwater acoustic networks, in particular to a UW-CSMA / CA-based node silence method in underwater acoustic network communication. Background technique [0002] The ocean occupies more than two-thirds of the earth's area, and the observation and development of the ocean have attracted more and more attention from all countries. At the same time, the underwater acoustic network has become a research hotspot worldwide. The data link layer protocol is an important part of the study of underwater acoustic network. Compared with the wireless channel, the bandwidth of the underwater acoustic channel is limited and the propagation delay is large, which poses a great challenge to the design of the MAC protocol of the underwater acoustic network. [0003] According to the channel acquisition method of the protocol, the MAC protocol is divided into a scheduling-based MAC protocol and a contention-based MAC protocol. Due t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02H04L29/06H04L1/16
Inventor 刘磊李宇张春华黄海宁
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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