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Admission control method in multi-hop wireless network

A multi-hop wireless network, admission control technology, applied in access restriction, wireless communication, network traffic/resource management, etc., can solve the problem of lack of predictability in admission control methods

Active Publication Date: 2011-10-19
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of lack of predictability and the need to estimate the available bandwidth in the existing admission control methods, and provide a predictive and more direct admission control method

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] figure 1 It is a schematic flow diagram of the principle of the admission control method provided by the present invention, as shown in the figure, including four steps: the first step is to initialize the relevant transmission parameters of each hop link; the second step is to calculate the average time slot length of each hop link ; The third step is to update the relevant transmission parameters of each hop link; the fourth step is to judge whether to accept new services. Among them, the next three steps are carried out iteratively.

[0041] figure 2It is to utilize NS-2 emulation software in the laboratory to the method provided by the present invention and existing CAC method (document " H.Zhai, X.Chen, Y.Fang.A call admission and rate control scheme for multimedia support over IEEE802.11 wireless LANs.ACM Wireless Networks, 2006, 12 (4): 451-463 ") c...

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Abstract

The invention provides an admission control method in a multi-hop wireless network, so as to solve the problem whether a new business can access into the multi-hop wireless network through a specified path under the condition that the existing business operation is not affected. In the technical scheme, the admission control method comprises the steps of firstly, assuming that the new business can not cause the increase of collision probability in the multi-hop wireless network after entering the multi-hop wireless network; and then predicting that the new business can cause the increase of collision probability practically after entering the multi-hop wireless network through continuous iterative computations; and finally, detecting whether the interference limit in the multi-hop wireless network is broken by utilizing an iteration result, so as to judge whether the new business is feasible on the specified path and make a decision on whether to admit the new business. In the invention, before the new business is admitted to the network, the condition after the new business enters the network is analyzed through the iterative process, so as to judge whether the result has predictability; besides, the prediction result is accurate and the convergence in the iterative process is good.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and relates to an admission control method in a multi-hop wireless network. Background technique [0002] Nodes in a multi-hop wireless network communicate in a multi-hop manner through wireless links. With the rapid growth of people's demand for information services, the research and application of multi-hop wireless networks have been continuously expanded in the past decade. In the past, people's research on multi-hop wireless networks mainly focused on how to efficiently provide sufficient connections for nodes in multi-hop wireless networks. Gradually increasing, the QoS requirements for supporting and guaranteeing services have become an important issue in the application of multi-hop wireless networks. In order to ensure the QoS of the service, it is necessary to control the admission of the new service requesting to enter the multi-hop wireless network. Its basi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/16H04W48/02
Inventor 赵海涛魏急波王杉习勇马东堂王德刚王欣
Owner NAT UNIV OF DEFENSE TECH
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