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Method of distributed real time detecting wireless self-grouping network topological structure

A network topology, distributed real-time technology, applied in wireless communication, data exchange network, data exchange through path configuration, etc., can solve problems such as network construction, and achieve the effect of low cost, simple implementation and low overhead

Active Publication Date: 2008-08-27
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Because in the temporary Ad-hoc network, the status of each node is equal, there is no so-called central node or gateway node in the above method, and it cannot be artificially determined that a certain node is responsible for the central node or gateway node. responsibility
In addition, due to the independence of the nodes connected to the Ad-hoc network, the network cannot be constructed in a way of arranging topology. To obtain the topology of the network, only passive detection can be used.
Therefore, the above method has great limitations in practical application.

Method used

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  • Method of distributed real time detecting wireless self-grouping network topological structure

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Embodiment Construction

[0040] This embodiment adopts 4 notebook nodes to form an Ad-hoc network, such as image 3 As shown, due to the limitation of wireless transmission distance, node 1 and node 2, node 1 and node 3 can communicate directly, but node 1 and node 4 cannot communicate directly, similarly, node 2 and node 4, node 3 and node 4 can communicate directly Communication, but node 2 and node 3 cannot communicate directly with each other. Each notebook uses the 0rinoco wireless network card produced by Luccent Company to communicate, and AODV routing protocol is installed in each notebook node. The improved signal strength collection function of the Orinoco wireless network card is used to obtain the wireless connection signal strength value, and finally the topology connection situation of the entire network can be obtained at each node through the method of the present invention.

[0041] Before communication, broadcast signal sending thread b_send, broadcast signal receiving thread b_recv...

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Abstract

The invention belongs to the wireless ad-hoc network technical field, in particular to a real-time low-cost distributed detection method of a wireless ad-hoc network topological structure. With the invention, messages can be transmitted to neighbors mutually through the nodes in the network and the function of real-time detecting the whole network topology and the changes of the whole network topology is achieved. In the detection process, no central node is needed, the topological structure messages known by each node is transmitted to the neighboring nodes by the node; after a plurality of clock periods, each node can obtain the topological structure of the whole network. Finally, the topological structure of the network is displayed in real time by the particle spring optimized model method, thus network maintenance and other application are facilitated. Different from the wireless sensor network, the detection process of the invention is taken in real time, thus the detection process of the invention is more adaptive to the wireless ad-hoc network with a varied topological structure and the real-time topological display brings convenience to more applications.

Description

technical field [0001] The invention belongs to the technical field of wireless ad hoc networks, in particular to a real-time, low-cost distributed detection method of the topological structure of wireless ad hoc networks. Background technique [0002] Wireless self-organizing network is a new type of network, it has many English names, such as Ad-hoc Network, Self-organizing Network, Infrastructureless Network, Multi-hop Network and PacketRadio Network, the most commonly used one is Ad-hoc Network. The word Ad-hoc comes from Latin, and its original meaning is "to this". In English, its basic meaning is "for a specific purpose, impromptu, impromptu, unprepared". In the wireless mobile ad hoc network, Ad-hoc represents no prior preparation and temporary meaning. [0003] Ad-hoc network is a mobile network without wired infrastructure support, and the nodes in the network are all composed of mobile hosts. The Ad-hoc network was originally used in the military field. Its rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/28H04W24/00
Inventor 戴琼海黎政肖红江
Owner TSINGHUA UNIV
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