Title :
Joint uplink and downlink optimization for video conferencing over wireless LAN
Author :
Su, Guan-Ming ; Han, Zhu ; Wu, Min ; Liu, K. J Ray
Author_Institution :
Electr. & Comput. Eng. Dept., Maryland Univ., College Park, MD, USA
Abstract :
A real-time video conferencing framework is proposed for multiple conferencing pairs by jointly considering the uplink and downlink conditions within IEEE 802.11 networks. We formulate this system so as to minimize the maximal end-to-end expected distortion received by all users by selecting the PHY modes and transmission time. Compared with the strategy of individually optimizing uplink and downlink, the proposed framework outperforms by 3.67-8.65 dB for the average received PSNR among all users.
Keywords :
distortion; minimisation; teleconferencing; wireless LAN; IEEE 802.11 networks; PHY modes; PSNR; joint uplink-downlink optimization; maximal end-to-end distortion; maximal end-to-end expected distortion; multiple conferencing pairs; real-time video conferencing; transmission time; wireless LAN; Base stations; Computer networks; Downlink; Educational institutions; Forward error correction; Physical layer; Resource management; Streaming media; Videoconference; Wireless LAN;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415601
