Type-2 fuzzy logic control of PQoS driven adaptive VoIP scheme

被引：3
|
作者：
Jammeh, E. [1 ]
Mkwawa, I. [1 ]
Sun, L. [1 ]
Ifeachor, E. [1 ]
机构：
[1] Univ Plymouth, Signal Proc & Multimedia Commun SPMC Res Grp, Plymouth PL4 8AA, Devon, England
来源：
ELECTRONICS LETTERS | 2010年 / 46卷 / 02期
关键词：
D O I：
10.1049/el.2010.3050
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Adaptive VoIP schemes have potentially suboptimal performance owing to imprecision in the metrics used to infer network state. An interval Type-2 fuzzy logic controlled scheme for VoIP services is presented. It infers network state from average delivered perceived quality of service and its degradation due to network congestion and updates an AMR codec mode to match voice quality to available network bandwidth. Tests showed that the scheme maximised delivered voice quality and outperformed an existing adaptive scheme. The scheme achieves robust performance in the presence of input imprecision and can be implemented in VoIP terminals, and the fuzzy rule base is easy to understand and change by non-experts because of its similarity to the human decision-making process.
引用
收藏
页码：137 / U55
页数：2
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