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Method for realizing congestion control of Ad Hoc network based on multi-path routing protocol

A routing protocol and congestion control technology, applied in the AdHoc network to realize the congestion control field of the ad hoc network, can solve problems such as system instability, network throughput reduction, queue oscillation, etc., to avoid simple packet loss, avoid blindness, and improve efficiency effect

Active Publication Date: 2017-06-13
XIDIAN UNIV
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Problems solved by technology

However, in the current AQM mechanism, in order to simplify the design, the delay link in the system is usually ignored. When the delay is relatively small, ignoring the delay has little impact on system performance; however, when the delay is relatively large, ignoring the delay often will cause system instability
The results of a large number of simulation experiments show that several typical AQM algorithms have the following disadvantages in the case of large delays. First, the queue fluctuates greatly, which increases the end-to-end delay jitter. Second, the link utilization rate is low and the network throughput is low. Significantly reduced, and finally the queue length cannot be converged, and a large number of nodes lose packets

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  • Method for realizing congestion control of Ad Hoc network based on multi-path routing protocol

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Embodiment Construction

[0031] The content of the present invention will be described in detail below in conjunction with the accompanying drawings and examples. The present example is implemented on the premise of the technical solution of the present invention, and provides detailed implementation modes and operation procedures, but the protection scope of the present invention is not limited to the following examples. .

[0032] refer to Figure 5 , the network scenario used in the present invention is an Ad Hoc self-organizing network. The network layer of the node adopts the multi-path table-driven protocol, the MAC layer adopts the TDMA protocol, the congested node is the node that is judged to be in the congested state according to the length of the cache queue of the node, the offload node is the node selected by the congested node for traffic scheduling, and the access node is the The third hop node on the main route of the offload node, the offload family node is the node on the link from ...

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Abstract

The invention discloses a method for realizing congestion control of Ad Hoc networks based on a multi-path routing protocol, which can mainly solve the problem that the prior art is lack of congestion control mechanisms, and the sharply-decreased network throughput and high node packet loss caused by congestion is further produced. The implementation scheme of the method comprises the following steps: 1, obtaining the periodic statistical data of each node in the network, and judging whether the node is congested; 2, analyzing whether the congestion reason of the congested node is caused by using the low-speed links or caused by excessive total flow of the congested node; 3, relieving the congestion of the congested node that is caused by using the low-speed links through the means of suppressing the low-speed links; and 4, relieving the congestion of the congested node that is caused by excessive total flow of the congested node through the means of flow scheduling or random packet loss. Compared with a traditional congestion control method, the method disclosed by the invention ensures that the targeted relief measures can be taken according to different congestion reasons, the network throughput can be further increased, and the method can be applied to the Ad Hoc networks.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and particularly relates to a method for realizing congestion control of an ad hoc network, which can be used in an Ad Hoc network. Background technique [0002] Ad Hoc network is a kind of non-central network which is temporarily composed of several wireless data transmission devices and does not require the support of fixed communication facilities. A network node is not only a communication terminal, but also acts as a router to forward data for other nodes. [0003] In recent years, scholars from various countries have carried out active researches on congestion control in Ad Hoc networks, and proposed several methods. The most common method is the congestion control method in the TCP protocol. Its congestion control mainly depends on the congestion window cwd. The size of the window value represents the number of bytes that can be sent at one time. Obviously, the larger the w...

Claims

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Application Information

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IPC IPC(8): H04W28/02H04W28/10H04W84/18
CPCH04W28/021H04W28/0284H04W28/0289H04W28/10H04W84/18
Inventor 史琰尹翔盛敏李建东刘俊宇仲伟慧
Owner XIDIAN UNIV
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