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High usage router method applied in underground wireless network

A wireless network and routing technology, applied in the field of wireless sensor network routing, to achieve the effects of easy implementation, optimized transmission distance, and cost-saving implementation

Inactive Publication Date: 2009-10-14
HUNAN UNIV
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  • Claims
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  • High usage router method applied in underground wireless network
  • High usage router method applied in underground wireless network
  • High usage router method applied in underground wireless network

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Embodiment 1

[0030] First, 2.4GHz sensor nodes are used to deploy in the underground roadway with a bidirectional topology. After the roadway environment is abstracted into a cylindrical structure, the propagation of wireless signals in the roadway can be divided into two types: one is near-wall propagation. In practice, the near-wall propagation will be affected by the uneven surface structure of the roadway and the geological conditions of different materials. Component interference, so the path loss is large, in this case, we use the logarithmic distance path loss model to estimate the signal strength; another kind of propagation mode is the propagation in the hole, in this case, the signal directly crosses the roadway hole , spread to the nodes deployed in parallel, this kind of propagation is not affected by the surface structure of the roadway, so the free space model can be used to estimate the signal strength. Routing requires nodes to choose the free-space mode for signal propagat...

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Abstract

The invention provides a high usage router method applied in an underground wireless network by combining the topographical features of the mine laneways. Firstly the critical angle and the critical distance of the switch between the underground laneway environment power estimation and the router are determined; a sending node selects the optimal next skipping node according to the position information of adjacent nodes, and the sending power is dynamically adjusted according to the judgment of near-wall transmission or in-cave transmission; a receiving node determines the transmission mode selected by the sending node according to the orientation of the sending node and performs corresponding receiving power estimation; once being determinated as the optimal forwarding node, the receiving node compresses the redundant RREQ and preferentially carries out RREQ forwarding process. At the same time, if the established route is interrupted due to the failure of the certain node, a complementary route can be found by the recorded RREQ information to restore the router. The method fully considers the features of the communication environment of the underground laneway, thus being a self-adaptive geographic router method with high robustness.

Description

technical field [0001] The invention belongs to the field of wireless sensor network routing, and relates to a high-efficiency routing method applied in underground wireless networks, and is applied to the effective transmission of monitoring and disaster relief data in special environments such as mine roadways. Background technique [0002] With the development of wireless communication, electronics and sensing technology, wireless sensor network has caused a wide range of applications. Wireless sensors are composed of sensors with sensing, data processing and short-distance wireless communication functions, and have broad application prospects in the fields of military defense, environmental monitoring, biomedicine, emergency rescue and disaster relief, and commercial applications. [0003] In the routing design of wireless sensor networks, combined with spatial location information, data transmission paths and forwarding nodes can be optimized, reducing redundant control...

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Application Information

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IPC IPC(8): H04W40/02H04W40/12H04W84/18
Inventor 李仁发吴迪罗娟曾凡仔肖玲
Owner HUNAN UNIV
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