Limited sending method for enhancing performance of 802.11 distributed coordination function

A technology of distributed coordination and sending method, which is applied in access restriction, electrical components, wireless communication, etc. It can solve the problems of difficult protocol stack compatibility and large changes in the back-off mechanism of distributed coordination functions, so as to achieve good compatibility and avoid Throughput starts to drop, achieving easy results

Inactive Publication Date: 2011-05-18
TSINGHUA UNIV
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Problems solved by technology

So far, a variety of methods have been proposed to improve the performance of the distributed coordination function of IEEE802.11 WLAN, but all of them h

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  • Limited sending method for enhancing performance of 802.11 distributed coordination function
  • Limited sending method for enhancing performance of 802.11 distributed coordination function
  • Limited sending method for enhancing performance of 802.11 distributed coordination function

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Embodiment Construction

[0022] Below in conjunction with embodiment the present invention is described in more detail.

[0023] The method for restricting transmission to enhance the performance of the 802.11 distributed coordination function, the steps are as follows:

[0024] Step 1: First, the user terminal equipment is equipped with a wireless network card and a module for limiting the probability of transmission rate. The wireless network card is equipped with the IEEE 802.11 protocol, and the user terminal equipment passes through a basic access mode or The RTS / CTS access method accesses the wireless LAN to become a site in the network;

[0025] Step 2: the access point in the wireless local area network invokes its internal estimation module to estimate the number of stations in the network with the maximum likelihood estimation method, and broadcasts the data to all stations in the network;

[0026] Step 3: Next, each network station in the wireless LAN sends the broadcasted number of networ...

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Abstract

The invention discloses a limited sending method for enhancing the performance of 802.11 distributed coordination function. When the number of websites is more than a preset value, limit probability can be dynamically adjusted according to the number of the websites so as to reduce collision probability, increase website access probability, and overcome the defects that the throughput of a basic access mechanism starts to decrease and mean packet time delay increases suddenly; therefore, the performance of the 802.11 distributed coordination function of a wireless local area network is improved. According to the implementation of the method, the original protocol of the distributed coordination function retreat mechanism of 802.11 is not greatly modified, the distributed coordination function retreat mechanism is completely maintained, and the method is well compatible with the conventional protocol stack, so that the method is easy to realize.

Description

technical field [0001] The invention relates to the technical field of wireless local area networks, in particular to a method for restricting sending to enhance the performance of the 802.11 distributed coordination function. Background technique [0002] IEEE802.11 wireless local area network is a wireless local area network standard initially formulated by IEEE, mainly used to solve the wireless access between users and user terminals in office LAN and campus network. With the rapid development of wireless communication technology and the Internet, IEEE802.11 wireless local area network is widely used in various fields of society due to its advantages of convenient networking, high mobility, reliability and scalability in emergency situations, and high transmission rate. , and the corresponding distributed coordination function of the IEEE 802.11 wireless LAN MAC protocol is a competitive channel access mechanism, which supports asynchronous services such as asynchronous ...

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Application Information

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IPC IPC(8): H04W48/10H04W74/08
Inventor 钟晓峰王果赵熠飞周世东李云州王京梅顺良
Owner TSINGHUA UNIV
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