Node-disjoint multipath routing method in cognitive wireless sensor network

A node-disjoint, cognitive wireless technology, applied in the field of cognitive users looking for routes, can solve the problems of not considering the diversity of available channels, performance cannot be guaranteed, etc., to achieve the effect of improving stability and utilization efficiency

Inactive Publication Date: 2013-08-07
NANJING UNIV OF POSTS & TELECOMM
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  • Claims
  • Application Information

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Problems solved by technology

Existing routing protocols in wireless sensor networks can effectively select routes in single-channel networks, but because they do not consider the diversity of available channels in the network, the performance of such protocols in multi-channel wireless networks cannot be guaranteed

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  • Node-disjoint multipath routing method in cognitive wireless sensor network
  • Node-disjoint multipath routing method in cognitive wireless sensor network

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Embodiment Construction

[0028] Assuming that there is a common control channel in the network for transmitting control information, each network node is configured with two interfaces, one is bound to the control channel, and the other can switch between data channels. If an authorized user needs to use the frequency band in the network, an occupation packet can be broadcast through the control channel to notify the surrounding nodes of the frequency band range that the primary user will use, and the cognitive users who use the frequency band will immediately give up or continue to use it ( If it does not affect the normal work of the main user), and re-find the route.

[0029] The basic principle of OSU-NDMR (On Spectrum Utility-Node Disjoint Multipath Routing) based on spectrum utility node disjoint multipath routing method is that in the process of establishing a route, nodes on a route should try to choose a node with a large spectrum utility while avoiding conflicts. The nodes and the correspond...

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Abstract

Provided is a node-disjoint multipath routing method in a cognitive wireless sensor network. In the process of establishing the routing, a routing request packet records node available channel information; a node receiving a packet sends back a routing reply packet; a link spectrum utility value is known according to a message unit in the routing reply packet; and the spectrum utility value and a set spectrum utility threshold value are compared for the selection of a next hop node. If propagation paths in two routing request packets are only intersected with each other, a second selection is performed according to average spectrum utility of the propagation paths in the routing request. With the routing method, routing selection and channel selection are combined with the spectrum utility together, and each path has no shared node except a source node and a destination node, and thus, conflict is reduced, stability of the routing is greatly improved, and the routing method is widely used in multi-channel distributed cognitive wireless sensor networks.

Description

technical field [0001] The present invention relates to a realization method for a cognitive user to find a route in a cognitive wireless sensor network, in particular to a realization method for finding a route by utilizing spectrum utility. Background technique [0002] Traditional wireless communication systems adopt a static spectrum allocation strategy, that is, authorized users have exclusive rights to the allocated spectrum, and other users cannot use it. Although this spectrum allocation method is beneficial to guarantee the service quality of the system, due to the unbalanced nature of communication services in the region, time domain, and frequency domain, the spectrum resources are not fully utilized. A large number of research reports by the Federal Communications Commission (FCC) in the United States show that the utilization of spectrum is extremely unbalanced. Some unlicensed frequency bands are crowded, while some licensed frequency bands are often idle. Due...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/02H04W40/24
CPCY02D30/70
Inventor 朱晓荣朱锋杨龙祥朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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