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Data transmission method for opportunistic mobile sensor network based on closeness centrality

A technology of network data transmission and mobile sensor, applied in the field of communication, can solve the problems of lack of data transmission, and achieve the effect of high transmission success rate, low transmission delay and good robustness

Inactive Publication Date: 2011-07-06
BEIHANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] Aiming at the current lack of data transmission of opportunistic mobile sensor networks for multi-sink node scenarios, the present invention proposes a method for data transmission of opportunistic mobile sensor networks based on proximity centrality

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  • Data transmission method for opportunistic mobile sensor network based on closeness centrality
  • Data transmission method for opportunistic mobile sensor network based on closeness centrality
  • Data transmission method for opportunistic mobile sensor network based on closeness centrality

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with accompanying drawings and examples.

[0036] The application scenario of the data transmission method of the opportunistic mobile sensor network based on proximity centrality proposed by the present invention is composed of sparsely distributed sensor nodes and several sink nodes, such as figure 1As shown, the black dot represents the sink node, and the white dot represents the mobile sensor node. The sensor nodes regularly collect various surrounding data such as temperature, humidity, air pollutants, etc. during the movement, and upload these data to the sink node when they encounter the sink node. The position of the sink node is fixed, and the mobile characteristics of the sensor nodes in the network are inconsistent, some are more active, and the mobile area is relatively large; on the contrary, some sensor nodes do not move frequently. Due to sparse nodes, the network is disconnec...

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Abstract

The invention relates to a data transmission method for an opportunistic mobile sensor network based on closeness centrality. An opportunistic mobile sensor network consisting of a plurality of sink nodes and sparsely distributed sensor nodes is taken as an application scene, wherein the sensor nodes are used for periodically collecting data during movement, the same time period is set for each sensor node, the interval time when each sensor node meets the sink nodes at the previous time and within the current time period is recorded, then the expected transmission delay and the closeness centrality for each sensor node are calculated, and the data transmission is determined by judging the closeness centrality when the sensor node meets the sink nodes. By adopting the method, the success ratio of data transmission is improved, and the transmission delay is remarkably shortened.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a data transmission method of an opportunistic mobile sensor network based on proximity centrality. Background technique [0002] Opportunistic mobile sensor networks are developed on the basis of wireless sensor networks and delay-tolerant networks, and are characterized by the fact that there is usually no end-to-end communication path between the source node and the sink (sink) node of data communication. Therefore, the mode of traditional wireless sensor network based on establishing the route from sensor node to sink node and then transmitting data cannot work. In an opportunistic mobile sensor network, the data transmission adopts the "store-carry-forward" mode, and uses the encounter opportunity formed by the movement of sensor nodes to forward data hop by hop until it encounters a sink node. The sink node is a sink node located at a fixed location, capable of analyz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W84/18
Inventor 牛建伟郭锦铠童超
Owner BEIHANG UNIV
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