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Control method for radio local network packet transmission delay

A technology of wireless local area network and packet transmission, which is applied in the field of communication and can solve problems such as the inability to effectively control the delay of data packet transmission

Inactive Publication Date: 2009-10-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect that the existing technology cannot effectively control the delay of data packet transmission, the present invention provides a performance analysis model of IEEE 802.11 wireless local area network in a more realistic "unsaturated state", and then proposes a method by adjusting each Method for controlling packet transmission delay in wireless local area network by sending terminal minimum contention window size

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  • Control method for radio local network packet transmission delay
  • Control method for radio local network packet transmission delay
  • Control method for radio local network packet transmission delay

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Embodiment Construction

[0027] Generally speaking, the method can be implemented in the IEEE 802.11 wireless access network card as firmware, or in the driver program of the wireless access network card. The implementation of each step is described in detail below.

[0028] Consider there are H sending terminals in the WLAN. Each sending terminal carries a service flow. For the convenience of description, we number the H sending terminals, from No. 1 to No. H. A business flow consists of data packets. The payload of each data packet has a transmission time T over the wireless channel L . The payload referred to here refers to the valid data from the upper layer of the communication protocol carried in the packet of the multiple access layer. The data throughput contributed by all sending terminals in the system is denoted as S. The data throughput contributed by the i-th (i=1,...,H) business flow is s i (i=1, . . . , H).

[0029] Below, this method will be described in conjunction with specif...

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Abstract

This invention relates to a method for controlling packet transmission delay of WLAN and provides a performance analysis model of IEEE 802.11 WLAN under a more practical 'unsaturated state' to further put forward a method for controlling packet transmission delay of WLAN by adjusting the minimum competition size of each transmission terminal so as to adjust its minimum competition size adaptively by dynamic real time test to the network service volume to satisfy the preset packet transmission delay, which can be realized as part of a fixture of a wire network card or part of its drive program.

Description

(1) Technical field [0001] The invention relates to the technical field of communication, in particular to a transmission control method applied to a wireless local area network. (2) Background technology [0002] The current IEEE 802.11 standard has become a recognized international standard for wireless LAN access technology. Two types of multiple access protocols are mainly defined in the IEEE 802.11 standard: one is the distributed coordination function (DCF), and the other is the point coordination function (PCF). Among them, DCF is a multiple access standard widely adopted in the industry, and is a multiple access random access strategy based on a carrier sense and collision avoidance mechanism. The basic working principle of DCF in the IEEE 802.11 standard is given a brief introduction as follows. [0003] With the development of multimedia technology, people need to consider how to support multiple services on the IEEE 802.11-based wireless LAN, and provide differe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04Q7/22H04W28/02
Inventor 李波
Owner NORTHWESTERN POLYTECHNICAL UNIV