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Freezing back-off processing method for contention window retained according to probability in wireless local area network

A technology of wireless local area network and contention window, which is applied in the field of backoff processing of wireless local area network that stays in the contention window according to the probability, which can solve the problems of low throughput and high delay, and achieve the effects of reducing collision probability, improving performance and reducing delay

Inactive Publication Date: 2020-05-08
ZHEJIANG GONGSHANG UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

However, the existing contention window value backoff processing methods can be divided into adjusting the contention window and modifying the backoff rules, but most of the existing backoff processing methods have too low throughput or high delay in the case of dense nodes.

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  • Freezing back-off processing method for contention window retained according to probability in wireless local area network
  • Freezing back-off processing method for contention window retained according to probability in wireless local area network
  • Freezing back-off processing method for contention window retained according to probability in wireless local area network

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] Such as figure 1 Shown, working embodiment of the present invention and implementation simulation process thereof comprise as follows:

[0050] 0) Initialize the data length, arrival time, contention window value and backoff count value.

[0051]1) When a node of a wireless local area network needs to send data, it starts to listen to the channel, and if it detects that the channel is idle for the distributed inter-frame space (DIFS) time, it sends data and jumps to 5); if it detects If you hear that the channel is busy, you will always listen until you hear that the channel is idle for the distributed interframe space (DIFS) time, and set the contention window value CW to W 0 , W 0 Indicates the competition window value of the initial backoff phase, and then enters the next step;

[0052] 2) Randomly select the backoff count value f...

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Abstract

The invention discloses a freezing back-off processing method for a contention window retained according to probability in a wireless local area network. The method comprises the following steps: monitoring the state of a channel of the wireless local area network, and sending data according to the state of the channel; setting a value of a contention window according to whether the data is successfully sent; after the node successfully sends the data, staying at the current contention window value according to a certain probability, and adjusting the contention window value to the minimum value according to the residual probability; setting freezing treatment. According to the method, throughput reduction caused by repeated adjustment of the competition window value is prevented, probability of collision between the data can be greatly reduced under the high load of the dense network, system throughput can be effectively improved, and time delay is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a backoff processing method of a wireless local area network that stays in a contention window according to a probability. Background technique [0002] Wireless local area network is a wireless network that communicates with wireless media in a local area. IEEE 802.11 is the most common standard for wireless local area network, and the distributed coordination function access mechanism is a contention-based access mechanism of IEEE 802.11 in the MAC layer. Responsible for controlling the transmission of data, core framing operations, and interaction with the wired backbone network. In order to avoid conflicts between data frames sent, in the IEEE 802.11 distributed coordination function access mechanism, a backoff processing method is used to avoid collisions. The backoff processing method determines the backoff time experienced by each node when sendi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/0833
Inventor 朱晨欢余燕平曹琪超罗逸男
Owner ZHEJIANG GONGSHANG UNIVERSITY
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