Method for expressing opportunistic sensor network connectivity by whole network connectivity

A sensor network and connectivity technology, applied in the field of Internet of Things, can solve the problem that the connectivity component cannot accurately reflect the connectivity of the entire network, and achieve the effect of accurate connectivity

Active Publication Date: 2016-07-20
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0005] The research objects of the above literature are wireless sensor network and delay tolerant network DTN, but for the opportunistic sensor network centered on the sink node, parameters such as connected components and network diameter cannot accurately reflect the connectivity of the entire network

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  • Method for expressing opportunistic sensor network connectivity by whole network connectivity
  • Method for expressing opportunistic sensor network connectivity by whole network connectivity
  • Method for expressing opportunistic sensor network connectivity by whole network connectivity

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Embodiment approach

[0042] figure 1 It is a schematic diagram of the scene of the present invention, and its specific implementation is as follows:

[0043] (1) Due to the limitation of geographical environment, figure 1 In the network scenario shown, each sensing area can only rely on mobile nodes moving randomly along a given route to deliver sensing data to the sink node. Opportunistic sensing networks run for a while [t 0 ,t τ ], network topology transformation such as figure 2 shown.

[0044] (2) Will figure 2 The relevant information is merged to obtain a TemporalGraph, such as image 3 shown. The time symbols (t 1 ,t 2 ,t 3 ) indicates the sequence relationship of link generation, which can reflect the accessibility (Sink node) of sensing data (generated by each sensing area). For example, although the perception area R3 has a "path" It leads to the Sink node, but the link R2→F2 is generated after the link F2→F1, so that the data can only be transmitted to F2, and the data c...

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Abstract

The invention discloses a method for expressing opportunistic sensor network connectivity by whole network connectivity. The method is applicable to practical application scenes such as environment monitoring and remote mountain region communication. For limitation of terrains, sensor networks are segmented into multiple regions; intra-region network connectivity is good; regions are disconnected; sensing data produced by the regions needs to be collected and transmitted through special mobile nodes; and therefore, the regionally disconnected opportunistic sensor networks are formed. According to the method, firstly, the key parameter--whole network connectivity capable of reflecting the network connectivity is defined according to the transmission characteristics of opportunistic sensor network sensing data; secondly, the whole network is periodically snapshot according to the topological transformation characteristics of the network; thirdly, an obtained snapshot set is converted into a sequential adjacent matrix set; and finally, the whole network connectivity is calculated through the sequential adjacent matrix set, wherein the whole network connectivity is used for expressing the connectivity conditions of the opportunistic sensor networks. According to the method, the transmission characteristics of the opportunistic sensor network sensing data are taken into consideration fully; and the connectivity conditions of the opportunistic sensor networks are accurately reflected by the whole network connectivity.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Things, and in particular relates to a method for expressing the connectivity of an opportunistic sensor network by using the connectivity of the entire network. Background technique [0002] In an opportunistic sensor network (OSN, Opportunistic Sensor Networks), mobile nodes move randomly or according to certain rules to achieve data collection in the target area. Compared with a large number of deployed static sensor networks, OSN achieves large-scale sensing at a lower cost, and has the basic characteristics of opportunistic networks (OppNet, Opportunistic Networks) and general delay-tolerant networks (DTN, DelayTolerantNetworks), namely intermittent connections, frequent splits, time Yangao and so on. In practical application scenarios such as environmental monitoring and communication in remote mountainous areas, due to terrain constraints, the sensor network is divided into multipl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W74/08H04W84/18H04L12/26
CPCH04L43/0811H04W24/02H04W74/0833H04W84/18
Inventor 舒坚蒋善东刘琳岚
Owner NANCHANG HANGKONG UNIVERSITY
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