FlexVi: PHY Aided Flexible Multicast for Video Streaming over IEEE 802.11 WLANs
| Autor: | Seokseong Jeon, Young-Joo Suh, Young Deok Park, Jae-Pil Jeong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Multicast
Computer Networks and Communications Computer science business.industry Orthogonal frequency-division multiplexing ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 020206 networking & telecommunications 02 engineering and technology Software-defined radio Spectral efficiency Video quality IEEE 802.11 Frame aggregation PHY 0202 electrical engineering electronic engineering information engineering Wireless Electrical and Electronic Engineering business Software Computer network |
| Zdroj: | IEEE Transactions on Mobile Computing. 19:2299-2315 |
| ISSN: | 2161-9875 1536-1233 |
| DOI: | 10.1109/tmc.2019.2923995 |
| Popis: | Wireless video multicast over IEEE 802.11 WLANs is a viable approach to bridging the gap between limited wireless resources and the ever-increasing mobile video traffic demand. However, existing wireless multicast mechanisms have several limitations, such as low spectral efficiency, high feedback overhead, and lack of consideration of the frame aggregation feature of current WLANs. In this paper, we propose FlexVi, a flexible wireless multicast solution for efficient video streaming over WLANs. Considering the frame aggregation of the current WLANs, FlexVi allows an access point to dynamically adjust the data rate on the basis of three factors: available wireless bandwidth, heterogeneity of the channel qualities among the clients, and the priorities among the video frames in terms of video quality. In addition, by harnessing the orthogonality of the subcarriers in the orthogonal frequency division multiplexing, FlexVi enables multiple clients to deliver their feedback to an access point simultaneously without collision, which results in very low feedback overhead. We verified the feasibility of FlexVi through experiments on a software defined radio platform. We also conducted an extensive simulation study and found that FlexVi outperforms the latest wireless multicast mechanisms. |
| Databáze: | OpenAIRE |
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