Wireless Local Area Network (LAN) frame flow control method

A wireless local area network and flow control technology, applied in the field of IEEE802.11 wireless local area network, can solve problems such as congestion, reduced network performance, increased frame traffic, queue delay, packet loss rate, etc.

Inactive Publication Date: 2012-03-28
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

The self-similarity of frame traffic will increase the queue delay and packet loss rate in the network, resulting in congestion, thereby reducing network performance

Method used

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  • Wireless Local Area Network (LAN) frame flow control method
  • Wireless Local Area Network (LAN) frame flow control method
  • Wireless Local Area Network (LAN) frame flow control method

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Embodiment Construction

[0031] In the present invention, the adjustment of the frame length sent by each station is controlled by a fragment threshold (Fragmentthreshold, FT). The fragmentation threshold is the threshold value used in the IEEE802.11 protocol for fragmentation transmission of overly long frames: when the length of the transmitted frame is greater than the threshold, the frame is transmitted in fragments according to the threshold value; on the contrary, when the transmission When the frame length is smaller than the threshold, there is no need to segment and transmit according to the original frame length. The present invention realizes the purpose of controlling the sending frame length by adjusting the segmentation threshold in real time.

[0032] According to the IEEE802.11 standard, during the operation of the wireless local area network, the access point will periodically send beacon frames to all stations in the basic service set (that is, the basic service set in which it is lo...

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Abstract

The invention discloses a wireless Local Area Network (LAN) frame flow control method, collecting and statistical data frame proportion information to decide how to adjust frame sending length of each station according to the proportion information at the access point (AP), then the AP feedbacks the adjusting information to each station of the network according to the timely broadcasted beaconingframe; each station adjusts the sending frame length thereof according to the adjusting information received from the beaconing frame. The method adaptively adjusts the sending frame length of each station data frame according to the real time data frame, mainly fits to be applied to the base network structure in IEEE802.11 standard. The wireless LAN frame flow control method overcomes the relatively strong self-similarity of the network frame low led by the fixed frame length and the alterable scale according to adaptively adjust the sending frame length in real time; reduces the probabilities of time prolonging, colliding and congestion led by flow self-similarity; improves the network performance.

Description

technical field [0001] The invention belongs to the field of MAC layer frame flow control of a wireless local area network, and specifically relates to a frame flow control method for adaptively adjusting frame lengths sent by each station in the wireless local area network according to real-time data frame ratio information. The invention is mainly applicable to IEEE802.11 WLAN. Background technique [0002] The IEEE802.11 wireless local area network is divided into two network layers, the physical layer and the MAC layer. The function of the MAC layer is to provide users with reliable data transmission on unreliable media. form of transmission. The MAC layer frame in the IEEE802.11 protocol includes three basic types: management frame, control frame and data frame, which have different functions and include different subtypes. Among them, the management frame mainly implements functions such as link establishment, connection, and maintenance, including association, re-as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/10H04W28/06
Inventor 葛晓虎刘创向林
Owner HUAZHONG UNIV OF SCI & TECH
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