Opportunity data return method of underwater sensor network

An underwater sensor and network technology, applied in network topology, transmission system, digital transmission system, etc., can solve problems such as the inability to meet reliable communication, and achieve the effects of less feedback signaling, improved performance, and improved quality

Active Publication Date: 2015-10-28
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

The performance of bit-based FEC at the physical layer is still poor and arbitrary in harsh underwater acoustic communication, and it c

Method used

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  • Opportunity data return method of underwater sensor network

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Embodiment

[0030] The system model of this embodiment is as figure 1 As shown, multiple underwater sensor nodes S are deployed in the seabed area of ​​interest A 1 ,S 2 ,…S n It is used to monitor and collect data information of interest in area A, and at the same time deploy multiple surface buoy nodes B in the corresponding sea surface area B of A 1 ,B 2 ,...B m , a base station R is deployed on the coast to collect sensor nodes S 1 ,S 2 ,…S n Observations and collected data are analyzed and processed.

[0031] Source S 1 ,S 2 ,…S n Divide the collected raw data into data packets of a certain length (L bits), and then form K data packets into a data block. All source nodes S 1 ,S 2 ,…S n The underwater acoustic channel is occupied by random access, and then the data packet in a data block is encoded without rate (here consider using Raptor code), and then the encoded packet is broadcast to all buoy nodes in the B domain of the water surface, and the header of the encoded p...

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Abstract

The invention discloses an opportunity data return method of an underwater sensor network. The method includes the steps: deploying multiple underwater sensor nodes in an interested sea area to monitor and collect data, deploying multiple surface buoy nodes on the surface of the corresponding sea area, collecting data observed and collected by the sensor nodes through a base station arranged on the surface of a sea or on a seashore or through ships on the sea, and analyzing and processing the data. The underwater sensor nodes (sources) broadcast the collected data to the buoy nodes on the surface of the sea after the data has undergone rateless coding. The underwater buoy nodes that have succeeded in receiving source coding packets sends coding packets which a sink does not succeeded in receiving to the sink through a wireless link. The sink returns confirmation information to the surface buoy nodes and the sources after receiving enough coding packets, and then the next around of transmission is started. The reliability of an underwater acoustic communication system can be improved in a steady and highly efficient manner, the transmission delay is minimized, and the capacity is improved.

Description

technical field [0001] The invention relates to the technical fields of opportunistic routing and reliable transmission of an underwater sensor network, and in particular to an opportunistic data return method of an underwater sensor network. Background technique [0002] Underwater sensor networks have many potential applications, such as ocean exploration, ocean data collection, ecological applications (such as pollution, water quality, and biological monitoring), public safety (such as earthquake and tsunami disaster prevention, monitoring), military underwater monitoring, Industry (Offshore Exploration), etc. However, before underwater sensor networks become commercial or widely used, a network of underwater sensor nodes must be established. [0003] Communications in underwater sensor networks are typically based on acoustic wireless links. Radio signals are not suitable for underwater communication because they are greatly attenuated in water. Light waves undergo se...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04W84/18
CPCH04L1/004H04W84/18
Inventor 官权升卿娟季飞
Owner SOUTH CHINA UNIV OF TECH
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