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QoS scheduler for voice service in broadband wireless MAN and method thereof

A voice service and quality of service technology, applied in data exchange network, data exchange through path configuration, digital transmission system, etc., can solve the problems of aggravating wireless channel bandwidth, packet loss rate and bit error rate, and channel communication quality Objects, weather, down signal attenuation and multipath effects

Inactive Publication Date: 2007-09-12
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the voice service is a two-way real-time service, it is very sensitive to service quality such as delay and jitter, and the wireless channel in the broadband wireless metropolitan area network is a channel with many interferences, and the communication quality of the channel is easily affected by obstacles, weather, etc. , resulting in signal attenuation and multipath effects, which aggravate the bandwidth, packet loss rate and bit error rate of the wireless channel
The Qos scheduling mechanism originally designed for wired networks cannot work well in broadband wireless metropolitan area networks

Method used

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  • QoS scheduler for voice service in broadband wireless MAN and method thereof
  • QoS scheduler for voice service in broadband wireless MAN and method thereof

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Embodiment Construction

[0024] The QoS scheduling method of voice service in the broadband wireless metropolitan area network of the inventive method, working process is as follows:

[0025] Step 1: generation of bandwidth request;

[0026] The terminal sends a bandwidth request to the base station through unicast bandwidth request (Unicast Request), contention bandwidth request (Contention Request) and bandwidth stealing (Piggyback), and the bandwidth request parsing module converts the bandwidth request into a request for uplink transmission bandwidth, and at the same time , the UGS bandwidth request generator and the rtPS bandwidth request reservation generator periodically generate bandwidth requests according to the Qos parameters of the corresponding services;

[0027] Step 2: Bandwidth request classification;

[0028] Bandwidth requests are stored in corresponding priority bandwidth request queue modules according to different types. The bandwidth requests generated by UGS bandwidth request g...

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Abstract

This invention relates to a phonetic service quality dispatcher in a broad band wireless MAN, among which, the dispatcher includes: UGS bandwidth required generator, rtps bandwidth required preserved generator, a bandwidth required analyzer, a priority bandwidth required queue module, a prior-degree computer and a bandwidth required imager. The method includes: 1, generating bandwidth request, 2, sorting the bandwidth request, 3, computing prior degrees, 4, distributing bandwidth. The invented wireless MAN supports multimedia service of data, video / audio streams and phones.

Description

technical field [0001] The invention relates to the technical field of broadband wireless communication, in particular to a QoS scheduler and method for voice services in a broadband wireless metropolitan area network. Background technique [0002] With the development of wireless communication technology, the Internet is also developing from wired network to wireless network. The current wireless network includes WLAN (Wireless Local Area Network), 3G (third generation mobile communication system) and broadband wireless metropolitan area network ( 802.16 and HiperMAN). The broadband wireless metropolitan area network supports services of different Qos, such as multimedia services such as data, real-time video, and audio, and also supports voice services such as E1, T1, and VOIP (Voice Over Internet Protocol). [0003] Since the voice service is a two-way real-time service, it is very sensitive to service quality such as delay and jitter, and the wireless channel in the bro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28H04L12/24
Inventor 方更法王国辉周继华孙毅石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI