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High throughput WLAN (Wireless Local Area Network) Mesh network rate selection method

A network rate and high throughput technology, applied in the field of high-throughput WLAN Mesh network rate selection, can solve the problems of poor WLAN Mesh network rate selection performance and noise interference, achieve fast convergence, less resource consumption, and improve throughput performance effect

Inactive Publication Date: 2010-12-22
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, to propose a simple, easy to implement and effective high-throughput WLAN Mesh network rate selection method, to solve the problem of rate selection performance in WLAN Mesh networks under noise interference and mobile situations bad question

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  • High throughput WLAN (Wireless Local Area Network) Mesh network rate selection method

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[0026] Firstly, an implementation manner of a high-throughput WLAN Mesh network rate selection method of the present invention will be specifically described in general.

[0027]First, after all terminals (including terminals and access points AP) in the WLAN Mesh network are started, each terminal determines to select a working mode. In this working mode, at least one wireless AP and one wireless terminal exist in the WLAN Mesh network. The terminal accesses the resources of other distributed systems through the AP. A single wireless AP that supports one or more terminals forms a Basic Service Set (BSS), and a group of two or more APs connected to the same distributed system forms a BSS. Extended Service Set (Extended Service Set ESS), an ESS is a single logical network segment (also called a subnet), and is identified by a Service Set Identifier (SSID) to form a WLAN Mesh network system. In this working mode, each terminal and access point (AP) loads a media access control ...

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Abstract

The invention relates to a high throughput WLAN (Wireless Local Area Network) Mesh network rate selection method. A terminal firstly distinguishes impact loss from noise jamming loss according to a selected data sending mode; the loss is distinguished by adding negative frame NACK (Negative Acknowledgement) for a basic access mode, and the loss is distinguished by the sending and receiving conditions of an acknowledgement frame ACK and a clear-to-send frame CTS for an RTS / CTS (Request To Send / Clear To Send) mode. The accurate estimation of channel state is realized on the basis of self learning of local information of a local MAC (Media Access Control) layer acknowledgement frame to instruct the selection of the rate of a physical layer. The terminal utilizes the maximum system throughput as a target function by maintaining a rate selection probability vector. When each rate in the system is selected for certain times, the terminal starts to update the probability vector so as to ensure the astringency and the stability of the rate selection algorithm, and then, the terminal selects any one rate for data transmission with the probability in the probability vector.

Description

technical field [0001] The invention relates to the technical field of wireless networks, in particular to a high-throughput WLAN Mesh network rate selection method. Background technique [0002] The Mesh network (Wireless Local Area Network-based Mesh Networks, WLAN Mesh) based on the wireless local area network not only has the ability of self-organization and self-management of the multi-hop mobile ad hoc network, but also has high mobility, strong confidentiality, and anti-interference of the WLAN network. It has the characteristics of good performance, easy erection and maintenance, and low construction cost. Due to the noise interference and time-varying characteristics of the wireless channel, in the actual environment, the performance of the WLAN Mesh network will be greatly affected, especially for mobile terminals, its performance will be affected more significantly, resulting in the throughput of the WLAN Mesh network, etc. Performance is greatly reduced. [000...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/22H04W84/12
Inventor 朱容波王江晴
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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