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Hydroacoustic media access control method based on reservation scheduling mechanism

A technology of media access control and underwater sound, which is applied in advanced technology, electrical components, power management, etc., can solve the problems of conflict-prone communication efficiency, short effective information transmission time, and low applicability of communication networks, so as to reduce the average transmission Delay, reduce the time for handshake, improve the effect of channel utilization

Active Publication Date: 2019-04-26
INST OF DEEP SEA SCI & ENG CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

The currently commonly used underwater acoustic communication MAC protocol is generally based on the random access mechanism and the handshake mechanism. The former is prone to conflicts when multiple nodes send information at the same time, resulting in a sharp drop in communication efficiency. Although the latter can avoid conflicts to a certain extent, However, due to the long propagation delay of the underwater acoustic channel, the handshake process becomes very long, while the transmission time of effective information is very short, resulting in low channel utilization.
In particular, the common underwater acoustic MAC protocol often only considers the communication between fixed nodes, and is not very applicable to communication networks with mobile nodes

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  • Hydroacoustic media access control method based on reservation scheduling mechanism
  • Hydroacoustic media access control method based on reservation scheduling mechanism
  • Hydroacoustic media access control method based on reservation scheduling mechanism

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Embodiment Construction

[0028] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0029] see Figure 1 to Figure 3 , an underwater acoustic media access control method based on a reservation scheduling mechanism, which includes several fixed nodes A, B, C, D and a unique mobile Sink node, and communicates in the following manner:

[0030] S1. The mobile Sink node broadcasts and sends an ND packet to the outside, and the ND packet includes a destination address, a source address, and a sending time;

[0031] S2. The fixed node that receives the ND packet, if there is a demand for data transmission, selects a random delay time, and sends an RTS packet to the mobile Sink node to make a data transmission reservation after the delay time is exhausted. The RTS packet contains the destination address and source Information such as address and de...

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Abstract

The invention provides a hydroacoustic media access control method based on a reservation scheduling mechanism. After a fixed node with a data transmission requirement receives an ND packet of a Sinknode, an RTS packet is sent to the Sink node for carrying out data transmission reservation; and the Sink node calculates information of propagation delay and the like according to information in theRTS packet, and then calculates data transmission time of each node, so that data transmission scheduling of each node is completed. The conflict problem of the data packets is effectively avoided based on the reservation scheduling mechanism, the handshaking time between the nodes is shortened, the channel utilization rate is obviously improved, and the data transmission efficiency is improved; and in addition, the nodes do not need to be subjected to time synchronization in advance, so that the implementation requirements of a hydroacoustic communication network are remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to an underwater acoustic media access control method based on a reservation scheduling mechanism. Background technique [0002] Unlike the use of electromagnetic waves as a carrier for information transmission on land, more acoustic methods are used for communication in the ocean. Underwater acoustic communication is currently the only way to achieve long-distance underwater information transmission. However, sound waves have inherent characteristics such as slow propagation speed and low frequency, which makes underwater acoustic communication and electromagnetic wave communication have a huge difference. Communication protocols suitable for electromagnetic waves often cannot be transplanted to underwater acoustic communication. The Media Access Control (MAC) protocol belongs to the data link layer protocol and is used to solve the problem of how to alloc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W24/02H04W52/02H04W74/04H04B13/02
CPCH04B13/02H04W4/06H04W24/02H04W52/0203H04W74/04Y02D30/70
Inventor 郭峰刘立昕万成昌吴慰
Owner INST OF DEEP SEA SCI & ENG CHINESE ACADEMY OF SCI
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