Dissertation/ Thesis
Link Rate Estimation and Adaptation for VoWLAN with Mobility
| العنوان: | Link Rate Estimation and Adaptation for VoWLAN with Mobility |
|---|---|
| Alternate Title: | 動態VoWLAN傳送速率的估計與調整 |
| المؤلفون: | 李彥輝 |
| Thesis Advisors: | 林盈達 |
| سنة النشر: | 2007 |
| المجموعة: | National Digital Library of Theses and Dissertations in Taiwan |
| الوصف: | 96 When transmitting VoIP traffic over wireless medium under mobility conditions, using constant rate for transmission would not be suitable. Rates too fast would result in massive packet loss; rates too slow would result in high channel occupation by a single station. Most research on rate selection only considers throughput, but the characteristics of applications, such as VoIP, is not considered. In this paper, we estimate an adapt transmission rate for VoWLAN with mobility. Besides mean opinion score (MOS) for voice quality evaluation, we introduce a measure, medium consumption (MC), for channel occupation. MC is the percentage of channel time occupied by a station during its VoIP connection. We propose Voice Quality based AutoRate (VQAR) to select per packet transmission rate that minimizes MC while achieving the required MOS (> 3.5). From our simulation results, all compared methods ARF/AARF, VQAR and RBAR meet the required MOS, but VQAR has lower MC than ARF/AARF and RBAR by 11% and 27%, respectively. |
| Original Identifier: | 096NCTU5726012 |
| نوع الوثيقة: | 學位論文 ; thesis |
| وصف الملف: | 27 |
| الاتاحة: | http://ndltd.ncl.edu.tw/handle/h4828g |
| رقم الانضمام: | edsndl.TW.096NCTU5726012 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |