A MAC protocol communication method based on cognitive acoustic technology

A protocol communication and technology technology, which is applied in the media access control of underwater wireless sensor networks and information fields, can solve the problems of propagation delay MAC protocol performance degradation, MAC protocol failure, underwater acoustic channel attenuation, etc., to achieve the effect of improving utilization.

Active Publication Date: 2021-11-05
ZAOZHUANG UNIV
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Problems solved by technology

[0003] (1) Due to the relatively low speed of sound (1500m / s), the propagation delay in the underwater environment is five orders of magnitude higher than that of radio waves in terrestrial channels
[0004] (2) The underwater acoustic channel has serious attenuation characteristics, especially the signal attenuation caused by time-varying multipath and fading
[0005] (3) The bandwidth of the underwater acoustic channel is relatively low, only about 10k / bps;
But due to the relatively low speed of sound (1500m / s), the underwater propagation delay is five orders of magnitude higher than that of radio waves in terrestrial channels
Excessive propagation delay will cause serious degradation in the performance of RTS (Ready-to-Send) / CTS (Clear-to-Send) MAC protocols, and will cause time-space uncertainty, data transmission conflicts, and cause MAC protocols to fail

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  • A MAC protocol communication method based on cognitive acoustic technology
  • A MAC protocol communication method based on cognitive acoustic technology
  • A MAC protocol communication method based on cognitive acoustic technology

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Embodiment Construction

[0043] The present invention will be further described by solving the accompanying drawings and specific embodiments below.

[0044] A MAC protocol based on cognitive acoustic technology, the protocol is based on the following network, each sensor node is equipped with a modem, the available bandwidth of each modem is divided into N sub-channels equally, and the number of sub-channels of each sensor node is the same and The bandwidth of each sub-channel is also the same, which includes a control sub-channel that only transmits control packets and N-1 data sub-channels that only transmit data packets, where N is a positive integer greater than 1. Described agreement realizes by following method, (1), design multi-session multi-channel link scheduling algorithm, this algorithm is based on 4 handshake mechanisms, comprises two parts of cooperative conflict detection and delay graph conflict avoidance, multi-session scheduling; (2) design A dynamic allocation algorithm of channel ...

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Abstract

The invention discloses a MAC protocol based on cognitive acoustic technology. On the basis of avoiding channel conflicts, the protocol designs a multi-session multi-channel link scheduling algorithm to realize time-space multiplexing at both ends of receiving and sending; then, using underwater acoustic recognition The known technology realizes the cross-layer optimization of the physical layer and the MAC layer by adjusting the operating parameters of the underwater nodes in the physical layer, combined with the link scheduling algorithm of the MAC layer and through the cross-layer optimization strategy.

Description

technical field [0001] The invention relates to a MAC protocol based on cognitive acoustic technology, belongs to the field of information technology, and is particularly suitable for the field of media medium access control of underwater wireless sensor networks. Background technique [0002] Although many MAC (Media Access Control) protocols for terrestrial wireless ad hoc networks and terrestrial wireless sensor networks have been invented, due to the huge difference between the underwater environment and the ground environment, the existing MAC protocols for terrestrial wireless communication networks And the link scheduling method cannot be directly applied to the underwater sensor network, it needs to redesign the MAC protocol with high efficiency and good stability. The main challenges faced in the design of underwater sensor network protocols and solutions are as follows: [0003] (1) Due to the relatively low speed of sound (1500m / s), the propagation delay in the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04L29/12H04W72/04H04W74/08H04B13/02
CPCH04B13/02H04W16/14H04W72/0453H04W74/085H04L2101/622
Inventor 宋传东王海峰刘真李超
Owner ZAOZHUANG UNIV
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