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Multi-link concurrent transmission method suitable for underwater acoustic sensor network

A technology of underwater acoustic sensors and transmission methods, applied in transmission systems, network topology, digital transmission systems, etc., can solve the problems that underwater acoustic nodes cannot directly access external networks, low channel utilization, etc.

Active Publication Date: 2020-03-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

But this introduces a new problem, that is, longer slots lead to lower channel utilization in the Slotted FAMA protocol
On the other hand, because the underwater acoustic sensor network uses sound waves to transmit information, the underwater acoustic nodes cannot directly access the external network

Method used

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  • Multi-link concurrent transmission method suitable for underwater acoustic sensor network
  • Multi-link concurrent transmission method suitable for underwater acoustic sensor network
  • Multi-link concurrent transmission method suitable for underwater acoustic sensor network

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with examples.

[0026] In the following description, this specification abbreviates the multi-link concurrent transmission method suitable for underwater acoustic sensor networks proposed by the present invention as MLC-FAMA (Multi-Link Concurrent transmission MAC protocol based on slotted FAMA protocol). MLC-FAMA first set the following network operating conditions:

[0027] 1. The underwater acoustic node works in a half-duplex state, that is, at the same time, the node can only send or receive data, but cannot send and receive at the same time;

[0028] 2. Ignore the small changes of the speed of sound in water with temperature, salinity and pressure under short-distance conditions;

[0029] 3. Some time synchronization methods for underwater acoustic sensor networks have been proposed. The method proposed in this manual does not discuss the time synchronization problem, but only assumes...

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Abstract

The invention discloses a multilink concurrent transmission method suitable for an underwater acoustic sensor network. The method can be divided into a channel competition process and a transmission planning process. The channel competition process is mainly as follows: a plurality of underwater acoustic nodes compete for a channel based on an improved RTS / CTS handshake protocol, transmission conflicts with other nodes in the data transmission process are avoided, and meanwhile nodes of mutually exposed terminals transmit data in a concurrent mode. In the data transmission planning process, when a plurality of sending nodes send data to a receiving node, the receiving node plans when the sending nodes send data, so that transmission conflicts are avoided, and the channel utilization rate is improved. The method aims to improve the network throughput as much as possible while avoiding transmission conflicts through an improved RTS / CTS handshake protocol, a modified back-off algorithm and a transmission planning algorithm. A simulation result in an EXata network simulation environment proves the effectiveness of the method.

Description

technical field [0001] The invention belongs to the field of underwater acoustic sensor networks, in particular to a multi-link concurrent transmission method suitable for underwater acoustic sensor networks. Background technique [0002] Underwater Acoustic Sensor Network (UASN) is a wireless sensor network using underwater acoustic waves as the transmission medium. It is composed of underwater acoustic sensor nodes and sea surface buoy nodes deployed in the sea and a two-way underwater acoustic link between them, and can transmit information back to the ship-based or land-based information through the underwater acoustic sensor nodes with electromagnetic wave signals Network of control centers. The underwater acoustic sensor network is of great significance in marine environment monitoring, resource exploration, disaster early warning, military reconnaissance and national security. In recent years, it has become the focus of underwater communication research of various r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04W74/08H04W84/18H04B13/02
CPCH04B13/02H04L41/145H04W74/0816H04W84/18
Inventor 雷磊詹长健黄加红李志林沈高青蔡圣所张莉涓
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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