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Method for avoiding hidden terminal and exposed terminal of underwater acoustic communication network

A technology that hides terminals and exposes terminals. It is used in duplex signal operation, electrical components, transmission systems, etc., and can solve problems such as complex technology and incompatibility, so as to avoid conflicts, save communication time, and solve data conflicts and unnecessary waiting. effect of the problem

Inactive Publication Date: 2013-08-14
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

It is a method applied in wireless local area network, and its complex technology is not suitable for underwater acoustic communication network

Method used

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  • Method for avoiding hidden terminal and exposed terminal of underwater acoustic communication network
  • Method for avoiding hidden terminal and exposed terminal of underwater acoustic communication network
  • Method for avoiding hidden terminal and exposed terminal of underwater acoustic communication network

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The invention is based on the RTS-CTS handshake protocol, and adopts dual-channel technology and full-duplex communication technology. The underwater acoustic channel is divided into control channel and data channel, and different frequency bands are allocated for the transmission of control messages and data messages. Using full-duplex communication technology, nodes can simultaneously receive and send control messages through the control channel when receiving data through the data channel. Using dual-channel technology and full-duplex communication technology to solve the data conflict caused by the hidden sending terminal. After receiving the RTS control message sent by the hidden sending terminal, the data receiving node replies to the DTS control message and rejects the communication request of the hidden sending terminal. Use dual-channel technology and ...

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Abstract

The invention relates to the field of underwater acoustic communication, in particular to a method for avoiding hidden terminal and exposed terminal of an underwater acoustic communication network. The method comprises the following steps: a channel is divided into a control channel and a data channel, wherein the control channel is used for transmission of a control message and the data channel is used for transmission of a data message; a sending node conducts channel reservation, the control channel sends an RTS (Request To Send) message, a receiving node judges the state of the current channel after receiving a CTS (Clear To Send) message; if the current channel is free, the CTS message is sent, the receiving node conducts successful channel reservation and starts to transmit data, and after data transmission, the receiving node replies to an ACK (acknowledgement) message; and if the current channel is busy, the receiving node sends a DTS (Data Transformation Services) message, and when the reservation fails, the sending node retreats, and channel reservation is conducted again after the retreat time is up. According to the invention, as the channel is divided into two channels, collision between the control message and the data message is avoided; and the control message and the data message independently encode and decode to achieve simultaneous transmission, so that the communication time is saved.

Description

technical field [0001] The invention relates to the field of underwater acoustic communication, in particular to a method for solving hidden terminals and exposed terminals of an underwater acoustic communication network. Background technique [0002] In recent years, with the development of underwater acoustic communication technology, underwater acoustic communication network has gradually become a research hotspot at home and abroad. Due to the long propagation delay, narrow available bandwidth, low transmission rate and complex time-varying multipath of underwater acoustic channels, many mature protocols in land wireless communication networks cannot be directly applied to underwater acoustic communication networks. A very serious problem in the design of underwater communication network protocols is hidden terminals and exposed terminals. The existence of hidden terminals will cause data conflicts at receiving nodes, resulting in data packet loss. Retransmitting confli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02H04L5/14H04L29/06
Inventor 乔钢章佳荣张禹周锋马雪飞孙宗鑫刘淞佐尹艳玲聂东虎于洋
Owner HARBIN ENG UNIV
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