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Link Stability Prediction Method in ad Hoc Network

A stability prediction and stability technology, applied in wireless communication, electrical components, etc., can solve problems such as frequent link disconnection and unstable routing

Inactive Publication Date: 2015-11-11
SHANDONG UNIV
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a link stability prediction method in an AdHoc network, to solve the problems of frequently disconnected links and unstable routes caused by node movement in the adhoc network, and improve the performance of the network (such as increasing the delivery of packets) rate, reduce end-to-end delay, etc.) to adapt to high mobility environment

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  • Link Stability Prediction Method in ad Hoc Network
  • Link Stability Prediction Method in ad Hoc Network
  • Link Stability Prediction Method in ad Hoc Network

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Embodiment Construction

[0056] An embodiment of the present invention is given below and is further described with reference to the accompanying drawings.

[0057] figure 1 , figure 2 in

[0058] (1) Link direct stability assessment

[0059] According to the Friis free space propagation model, the received power (P RX ) To transmit power ratio (P TX ) Is inversely proportional to the square of the transmission distance (R), that is P RX P TX ∝ 1 R 2 or R ∝ P TX P RX .

[0060] In the present invention, it is assumed that the lower limit of the received power is P min , That is, when the received power is lower than this value, a higher bit error rate will be generated, resulting in the retransmission of data packets. Accordingly, the transmission distance at this time is R max . Since different nodes are in different environments, P min The value of is different. In the present invention, P of all nodes min It is initialized to a fixed value. Wh...

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Abstract

The invention discloses a prediction method for link stability of an Ad Hoc network, which includes steps: firstly, assessing direct stability of the link; secondly, assessing indirect stability of the link; thirdly, assessing comprehensive stability of the link; fourthly, taking stability as a foundation for a multicast routing protocol so as to solve the problem that the multicast routing protocol based on the existing link stability serving as a routing standard is unable to adapt to an unstable environment with high mobility, strong interference and the like. The prediction method for link stability of the Ad Hoc network is simple in calculation, low in working capacity during a process of accessing the link stability, stable in holistic performance and strong in adaptability for the network and low in energy consumption and has low requirements for hardware.

Description

Technical field [0001] The invention belongs to the field of mobile AdHoc network (MANET), and specifically relates to a method for predicting link stability in an AdHoc network for link stability. Background technique [0002] The mobile AdHoc network is a dynamically reconfigurable wireless network. Each node acts as a host and a router at the same time. As a host, a node needs to run its own applications; as a router, a node is responsible for forwarding data according to a specific routing protocol. AdHoc network is widely used in disaster rescue (such as earthquake, fire) and distributed collaborative computing. [0003] In practical applications, since one node often needs to send the same data to multiple nodes, a multicast routing protocol has emerged. However, because mobile adhoc networks have characteristics such as random movement of nodes, limited resources, and unreliable channels, traditional multicast protocols cannot be well adapted to the MANET network environme...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04W40/00
Inventor 蔡晓军张志勇贾智平夏辉
Owner SHANDONG UNIV
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