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Congestion control method based on equitable distribution of communication channel

A congestion control and fair technology, applied in the field of communication, to prevent false detection and missed detection, improve fairness, and increase throughput

Inactive Publication Date: 2015-01-07
XIANGTAN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

How to ensure efficient and orderly channel resource allocation and maintain a high packet delivery rate by reducing channel collisions caused by excessive competition is a key technical problem that needs to be solved urgently to alleviate congestion, and there is currently no suitable solution

Method used

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  • Congestion control method based on equitable distribution of communication channel
  • Congestion control method based on equitable distribution of communication channel
  • Congestion control method based on equitable distribution of communication channel

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Embodiment Construction

[0027] The present invention designs a congestion control method for channel fair allocation, combining figure 1 , the specific implementation method of congestion control is as follows:

[0028] Step 1. Preprocessing: Calculate the time T required to successfully send a data packet s 1 and ideally a dummy period T cycle The maximum amount of data that can be transmitted within D max ,Specific steps are as follows:

[0029] 1) Define the maximum value of the queue as Q lim , the sending rate is DR, the bandwidth is BW, and the transmission delay is T delay , the request packet RTS length is L rts The lengths of the control packets CTS and ACK are L respectively cts and L ack , the packet length is L data , the backoff window is CW, and the time slot is T stot , SIFS duration is T SIFS , DIFS duration is T DIFS , the time T required to successfully send a data packet s 1 for:

[0030] T s 1 ...

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Abstract

The invention discloses a congestion control method based on equitable distribution of a communication channel. The method comprises the following steps: firstly, the queue increase rate of an upstream neighbor node and the average transmission delay of a data packet are estimated according to the acquired data of the upstream neighbor node; then, the queue length of the upstream neighbor node is calculated according to the estimated queue increase rate, the total queue length of the node and the upstream neighbor node is further calculated, and the congestion detection is carried out in combination with the average transmission delay of the data packet; if congestion occurs, the network congestion degree (namely the congestion degree) is classified, the length of the congestion relief period is determined, and the node is equitably distributed with the communication channel occupation time; finally, a congestion relief algorithm is carried out according to the congestion degree so as to relieve or ease the congestion; if the congestion does not occur, no treatment is carried out. The use equity of the channel is improved, the collision and the packet loss probability are effectively reduced, and the handling capacity is effectively increased.

Description

technical field [0001] The present invention relates to the communication field, and in particular to a congestion control method based on channel fair allocation. Background technique [0002] In a Wireless Sensor Network (WSN), the many-to-one communication mode, limited wireless bandwidth resources, and mutual interference of wireless links make wireless sensor networks prone to congestion. Network congestion can easily cause buffer overflow, resulting in a large amount of data packet loss, increasing network queuing delay, and consuming a lot of extra energy. At the same time, network congestion will also cause access conflicts, reducing link utilization and network throughput. Therefore, detecting and removing congestion efficiently and in real time has become a hot topic to ensure the quality of service in wireless sensor networks. [0003] Congestion control can be divided into two methods: network resource management and traffic control. Network resource managemen...

Claims

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Application Information

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IPC IPC(8): H04W28/02
CPCH04W28/0289H04W28/0236H04W28/0278
Inventor 李哲涛陈潜李玉龙王志强朱更明
Owner XIANGTAN UNIV
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