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MACA-U (Multiple Access Collision Avoidance for Underwater Wireless) protocol-based underwater acoustic network multiple-address accessing method

A technology of underwater acoustic network and access method, which is applied in the direction of electrical components, wireless communication, transmission system, etc., can solve the problems of occupation time, increase, and unfavorable network throughput, and achieve the effect of avoiding conflict and suppressing interference

Active Publication Date: 2015-02-11
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the persistent waiting rules and silent rules in the MACA-U protocol strictly limit the sending of adjacent node data, which is not conducive to the improvement of network throughput.
At the same time, the node waits too long during the RTS-CTS-DATA exchange process, which occupies most of the time in the communication process

Method used

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  • MACA-U (Multiple Access Collision Avoidance for Underwater Wireless) protocol-based underwater acoustic network multiple-address accessing method
  • MACA-U (Multiple Access Collision Avoidance for Underwater Wireless) protocol-based underwater acoustic network multiple-address accessing method
  • MACA-U (Multiple Access Collision Avoidance for Underwater Wireless) protocol-based underwater acoustic network multiple-address accessing method

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Embodiment Construction

[0048] The present invention will be further described now in conjunction with accompanying drawing.

[0049] refer to figure 2 , in a communication process of the underwater acoustic network, including the active node S, the destination node D and other nodes A and B. Each node in the underwater acoustic network keeps a local busy time table, which stores the busy time of the node, that is, the busy start time and the busy end time. The busy time refers to the time when the node is ready to send or receive data packets. Time, storing the busy time of each node in the local busy time table in advance can prevent receiving multiple data packets from different nodes at the same time, resulting in data packet collision. The data format of the local busy schedule is shown in Table 1:

[0050] Table 1 Local busy schedule

[0051] busy start time

busy end time

[0052] Taking these nodes in the underwater acoustic network as examples, the method of the prese...

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Abstract

The invention relates to an MACA-U (Multiple Access Collision Avoidance for Underwater Wireless) protocol-based underwater acoustic network multiple-address accessing method. The method comprises the following steps in an RTS-CTS exchange process of a source node and a destination node, if the source node or the destination node receives an RTS transmitted by the other node, on the premise that the existing time of the source node or the destination node is enabled to not conflict, calculating the time when the source node or the destination node is suitable for the receiving of a data frame transmitted by the other node; replying a CTS to the other node, wherein the CTS comprises the time waited by the other node from the time when the CTS is received to the time when the data frame is transmitted, and the silence time after the time when the other nodes except the other node receive the CTS; after the other nodes receive the CTS, transmitting the data frame after waiting for some time according to the CTS.

Description

technical field [0001] The invention relates to the field of underwater acoustic networks, in particular to an underwater acoustic network multiple access (MAC) method based on the MACA-U protocol. Background technique [0002] The status of the ocean in the economic, social and military aspects is becoming more and more important, and people urgently need to improve the ability to acquire and process marine information. As a new marine information technology, underwater acoustic network has broad application prospects in environmental monitoring, disaster early warning, marine engineering, underwater defense and other fields, so it has been paid more and more attention by researchers. The average propagation speed of sound underwater is 1500m / s, which is 3x10 faster than the propagation speed of electromagnetic waves in radio channels. 8 m / s is 5 orders of magnitude lower. The corresponding propagation delay is 0.67s / km, and the communication distance between network node...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04B13/02
Inventor 刘磊李宇张春华黄海宁
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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