Environment-adapted routing method of wireless sensor network for maritime search and rescue

A wireless sensor network and self-adaptive technology, applied in the field of wireless search and rescue, can solve problems such as unstable link quality, high dynamics, and low node routing efficiency

Inactive Publication Date: 2015-05-06
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

[0007] The invention provides an adaptive routing method for a wireless sensor network environment for maritime search and rescue, which solves the problem of low node routing efficiency in the wireless sensor network for search and rescue at sea, can adapt to networks with high dynamics and unstable link quality, and reduces unnecessary energy consumption

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  • Environment-adapted routing method of wireless sensor network for maritime search and rescue
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  • Environment-adapted routing method of wireless sensor network for maritime search and rescue

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specific Embodiment

[0053] Cluster head election

[0054] In the example of the present invention, when the wireless sensor network is deployed, the initial energy of the nodes is the same (the node can be a sensor node carried by goods or people in the water, or a sensor node thrown on the sea). LEACH (Low Energy Adaptive Clustering Routing Mechanism) is the earliest and most typical clustering routing protocol. The idea of ​​the protocol is to randomly select cluster head nodes in a round-robin manner to reduce network energy consumption and prolong network lifetime. LEACH randomly elects nodes as cluster heads to ensure that energy is evenly distributed among nodes in the network. The sensor node n randomly generates a random number between (0, 1), and compares it with the threshold function T(n); if the random number of the node is less than the threshold, the node becomes the cluster head in this round, and contributes to the effective Other nodes within the communication distance broadca...

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Abstract

The invention relates to an environment-adapted routing method of wireless sensor network of maritime search and rescue. The method is characterized in that the wireless sensor network formed by self-networking through a plurality of nodes includes a plurality of clusters formed by the nodes. The method comprises the steps of calculating the threshold of each node according to the node energy, the energy spacing and the channel quality during the cluster head election of each cluster; comparing the thresholds; selecting one node as the cluster head node by cycling; building route measurement adapted to the mobility of the nodes; selecting a reliable route chain according to the route measurement; creating a priority transfer node list; selecting the corresponding relay node through the cluster head node according to the priority in the transfer node list so as to transfer information to the outside. According to the method, the route measurement adapted to the environment can be created according to the environment change of the wireless sensor network; the characteristics of secondary clusters and opportunism routes are effectively utilized to adapt to the high-dynamics network, and therefore, the data transmission efficiency can be increased.

Description

technical field [0001] The invention relates to a wireless search and rescue technology in the field of maritime security and wireless sensor network technology, in particular to a wireless sensor network for maritime search and rescue and an environment adaptive routing method thereof. Background technique [0002] The current main search method for maritime search and rescue is to search for targets passively waiting for search and rescue. This search and rescue method is costly and inefficient, and the search and rescue targets cannot provide effective status information to the search and rescue party. Wireless Sensor Networks (WSN) technology is a rapidly popular communication technology. Sensor nodes can self-organize to form a multi-hop network. They can collect relevant information of search and rescue targets in time and send them to search and rescue parties, greatly improving search and rescue. Party search and rescue efficiency. [0003] Since WSN technology can ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/02
CPCY02D30/70
Inventor 吴华锋聂骕
Owner SHANGHAI MARITIME UNIVERSITY
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