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Data transmission method in opportunity network

A data transmission method and network technology, applied in the field of data transmission under opportunistic networks, can solve the problems of large transmission delay and insufficiency, reduce network load, reduce network load and equipment energy consumption, and solve the problem of redundant copies Effect

Inactive Publication Date: 2008-07-16
BEIHANG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The typical representative of this strategy is the utility-based algorithm. Although it improves the transmission success rate and transmission delay to a certain extent, the transmission delay is still large and cannot meet the requirements of most application scenarios.

Method used

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  • Data transmission method in opportunity network

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Embodiment Construction

[0037] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0038] A data transmission method under an opportunistic network, as shown in Figure 2, comprising the following steps:

[0039] Step 1: Perceptual information collection.

[0040] In this example, at 2000×2000 meters 2In the simulation area of ​​, it is assumed that the mobility of the device satisfies the random Way-Point movement model, the value range of the moving speed of the device is (0-5) m / s, and the stop time is 20s. Before network transmission and during the entire network transmission, each mobile device sends some detection packets every 1 second, and at the same time receives detection packets from other mobile devices, and counts and records the received detection packets, and calculates the device’s Utility value, get the perception information table of the device. The specific perception information includes: the last encounter ti...

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Abstract

The present invention provides a data transmission method in an opportunity network. When the network partial region topology is relatively stable, the method adopts a policy aided routing that a mobile device creates a communication domain by self-assembly; if a mobile device having message encounters any mobile device in the connected domain, the message can be forwarded to a mobile device which has maximum possibility to encounter the target device so as to reduce transmission time delay; meanwhile, in the data transmission process, the method integrates a transmission strategy based on duplication and a transmission strategy based on perceptive information; the duplication and forwarding conditions of the data is dynamically adjusted according to the sensed network status information; under the condition of ensuring a certain transmission success rate, the energy consumption and network load of the mobile device is reduced during the data transmission process, the forwarding efficiency among the mobile devices is enhanced, the practicality of the data transmission in an opportunity network is enhanced, and good network support is provided to the mobile P2P application of superior.

Description

technical field [0001] The invention belongs to the communication field and relates to a data transmission method, in particular to a data transmission method under an opportunistic network. Background technique [0002] Opportunistic networks are a new type of network that has emerged in recent years. In an opportunistic network, network nodes are divided into multiple isolated connected areas. There may not be an end-to-end path between the source node and the destination node. The movement of the node makes the node meet other nodes to form a communication opportunity. The data follows the node The movement and forwarding between mobile nodes realize the transmission. The characteristic of this type of network is that although the transmission delay is large, the data transmission cost is low, and it is especially suitable for environments where it is difficult to set up network infrastructure. Currently, there are many applications that tolerate large delays, such as n...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L45/18H04L45/74
CPCY02B60/50
Inventor 牛建伟周航孙利民
Owner BEIHANG UNIV
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