A multi-access method for underwater acoustic network based on maca‑u protocol

An underwater acoustic network and access method technology, applied in electrical components, wireless communication, transmission systems, etc., can solve problems such as occupying time, increase, and adverse network throughput, and achieve the effect of avoiding conflicts and suppressing interference.

Active Publication Date: 2017-12-29
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Claims
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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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  • A multi-access method for underwater acoustic network based on maca‑u protocol
  • A multi-access method for underwater acoustic network based on maca‑u protocol
  • A multi-access method for underwater acoustic network based on maca‑u protocol

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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 present...

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Abstract

The present invention relates to an underwater acoustic network multiple access method based on the MACA-U protocol, comprising: during the RTS-CTS exchange process between a source node and a destination node, if the source node or the destination node receives an RTS-CTS message sent by another node RTS, on the premise of ensuring that there is no conflict with the existing busy time of the source node or the destination node, calculate the time when the source node or the destination node is suitable for receiving the data frame sent by the other node; then reply CTS to the other node, in the CTS Including the time that the other node should wait from receiving the CTS to sending the data frame and the time that other nodes except the other node should be silent after receiving the CTS; after receiving the CTS, the other node waits for a period of time according to the CTS and then sends Data Frame.

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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Patent Type & Authority Patents(China)
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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