Multi-node rapid communication method suitable for contention channel underwater acoustic network

An underwater acoustic network and fast communication technology, which is applied in wireless communication, electrical components, transmission systems, etc., can solve the problems of multi-node communication average time extension and low channel utilization rate, and achieve the goal of reducing average delay and improving utilization efficiency Effect

Inactive Publication Date: 2015-04-01
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0007] Aiming at the disadvantages of low channel utilization rate and prolongation of the average time of multi-node communication caused by the media access control protocol in the existing competitive channel underwater acoustic network because only one pair of nodes is allowed to communicate in each transmission cycle, the present invention provides an applicable The multi-node fast communication method based on the competit

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  • Multi-node rapid communication method suitable for contention channel underwater acoustic network
  • Multi-node rapid communication method suitable for contention channel underwater acoustic network
  • Multi-node rapid communication method suitable for contention channel underwater acoustic network

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Embodiment 1

[0046] In Embodiment 1, when there are nodes in the network that need to transmit data, they first listen to the channel, and when the channel is idle, the network starts a new transmission cycle and enters the handshake phase, and the node that needs to send data broadcasts RTS signaling. It includes a time stamp and the length of the data packet to be sent, and the above time stamp is the time when the RTS signaling is sent. There are 3 nodes in the network (recorded as s in the order sent by RTS 1 ,s 2 ,s 3 ) need to send to the remaining 3 nodes (denoted as d 1 , d 2 , d 3 ) sending data as an example, node s 1 ,s 2 ,s 3 Broadcast RTS signaling separately, destination node d 1 , d 2 , d 3 agree with s 1 ,s 2 ,s 3 During communication, the broadcast replies to the CTS signaling. The CTS signaling includes a time stamp, and the time stamp is the time when the CTS signaling is sent. Each node starts timing after detecting any CTS signaling, when the difference ...

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Abstract

The invention discloses a multi-node rapid communication method suitable for a contention channel underwater acoustic network. Each transmission cycle in the method comprises a handshake phase, a transmission phase and an end phase; the method comprises the following concrete steps that SA1, when a channel is idle and at least one node needs to transmit data, a network enters the handshake phase; SA2, after the handshake phase is ended, the network enters the transmission phase; the moment at which the data can be transmitted to a corresponding destination node without conflict by the node is calculated by priority order through each node which needs to transmit information, and after timing is performed for the moment, the data is transmitted to the corresponding destination node; SA3, after data transmission of all the nodes is ended, the network enters the end phase. According to the multi-node rapid communication method disclosed by the invention, the data can be transmitted in batches without generating the conflict in the same transmission cycle by multiple nodes in the underwater acoustic network, so that the utilization efficiency of the channel can be effectively improved, and the average delay of the channel is reduced; the multi-node rapid communication method can be widely used for occasions with various contention protocol-based underwater acoustic communication networks, underwater acoustic sensing networks and the like.

Description

technical field [0001] The invention relates to the field of underwater acoustic communication, in particular to a multi-node fast communication method suitable for competing channel underwater acoustic networks. Background technique [0002] Underwater acoustic communication network is an important research direction of underwater communication technology. It has a wide range of uses in underwater exploration, underwater oil exploitation, tactical monitoring, pollution monitoring, tsunami early warning, auxiliary navigation, ecological monitoring, etc. Building a high-performance underwater acoustic communication network not only needs to solve the reliable communication between two underwater point-to-point users, but also needs to consider how to efficiently interact with information when multiple users share the water medium channel. The characteristics of narrow frequency band, time extension and energy limitation of underwater acoustic channel make media access control...

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Application Information

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IPC IPC(8): H04B13/02H04W74/08
Inventor 张军武春花冯义志宁更新季飞余华陈芳炯韦岗
Owner SOUTH CHINA UNIV OF TECH
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