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Information correlation based opportunistic network data distributing method

A technology of information correlation and network data, which is applied in the field of wireless communication data distribution and opportunistic network data distribution based on information correlation, which can solve problems such as implementation difficulties and achieve the effects of small transmission overhead, increased diffusion speed, and stable interest

Inactive Publication Date: 2010-07-07
BEIHANG UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The message forwarding process is no longer driven by the source node, but is forwarded by the intermediate forwarding nodes according to the content. However, these nodes need to summarize global messages to make behavior judgments, which is difficult to implement for vehicle networks with relatively isolated regions.

Method used

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  • Information correlation based opportunistic network data distributing method
  • Information correlation based opportunistic network data distributing method
  • Information correlation based opportunistic network data distributing method

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Embodiment Construction

[0031] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0032]First let's define:

[0033] Definition 1 Query message: represented by Q, it is a message sent by a user when querying information, and its format is: Q(destination, time, type). Among them, destination is the address code of the query destination, time is the time when the query message is generated, and type is the event category of the query message.

[0034] Definition 2 Social information: represented by I, which is generated by the information source, and its format is: I(source, destination, time, type, limite). Among them, source is the social information generation address, that is, the address of the information source, destination is the destination address to which the social information is sent, time is the generation time of the social information, type is the event category, and limit is the validity period of the social informa...

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Abstract

The invention provides an information correlation based opportunistic network data distributing method. The method comprises the following steps: dividing regions of an electronic map carried on a vehicle through specifically defined information format, abstract bus routes and station information, and simultaneously carrying out binary coding on the regions based on the division; ensuring that each route station acquires a unique code; summarizing interest information to form a vehicle interest list; calculating the correlation of social information through the interest list to drive information distribution; and transmitting the information to the region which is interested in the information. The method acquires priori knowledge through an active studying mode by using the characteristics of fixed bus routes and stable people interests in the region, drives data oriented distribution by using accumulated knowledge, improves the hit rate of information querying, and simultaneously reduces network load and message distribution delay.

Description

technical field [0001] The invention relates to a wireless communication data distribution method, in particular to an opportunistic network data distribution method based on information correlation, and belongs to the technical field of wireless communication. Background technique [0002] Opportunistic Networks (OppNet for short) refers to a wireless ad hoc network that does not have a complete path between the communication source and the target, and realizes communication through connection opportunities brought about by device movement (Reference [1]: Opportunistic Network, author Xiong Yongping, Journal of Software, Vol.20, No.1, January 2009, pp.124-137). In this type of self-organizing network, due to the sparse distribution or fast movement of mobile devices, plus factors such as wireless channel fading and interference, it is impossible to form a connected network. [0003] Vehicle-based ad-hoc networks (VANETs for short) are opportunistic networks composed of mob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/12H04W84/00G08G1/123
Inventor 牛建伟刘畅蔡青松童超
Owner BEIHANG UNIV
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