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Improving Quality of Service for VoIP Traffic in IEEE 802 . 11 Wireless Networks
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shin, Sangho |
| Abstract | Even though the usage of VoIP traffic in wireless networks is increasing due to widely deployed wireless networks, the Quality of Service (QoS) for VoIP traffic in wireless networks is not satisfactory. The biggest problem in VoIP traffic in wireless networks is the significant fluctuation of the delay due to the unreliability and the limited capacity of wireless networks: the delay of VoIP traffic fluctuates significantly even when the number of VoIP source is below the capacity, and the overall delay of all VoIP flows drastically increases when the number of VoIP sources approaches the capacity, due to the characteristics of CSMA/CA. I propose a new packet scheduling algorithm called Adaptive Priority Control (APC) to alleviates the delay fluctuation and improve the capacity, and a novel call admission control with the Queue size Prediction using Computation of Additional Transmission (QP-CAT) to avoid admitting an excessive number of simultaneous calls. APC adopts the optimal priority of the downlink traffic adaptively to the channel condition in order to balance the downlink and uplink delay, which minimizes the fluctuation of delay and improves the capacity for VoIP traffic. In QP-CAT, the AP can accurately estimate the effect of a new VoIP flow on the delay of all VoIP flows by predicting queue size of the AP, before the new VoIP flow is actually admitted, and it can make exact admission decisions for new calls. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.cs.columbia.edu/~ss2020/papers/proposal.pdf |
| Alternate Webpage(s) | http://www1.cs.columbia.edu/~ss2020/papers/proposal.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
