Title :
Energy efficient video telephony over UMTS
Author :
Kodikara, C. ; Worrall, S. ; Kondoz, A.M.
Author_Institution :
Centre for Commun. Syst. Res., Surrey Univ., Guildford, UK
Abstract :
A novel joint unequal error protection (UEP) and unequal power allocation (UPA) algorithm is proposed. UEP is performed through multiple radio bearers with different error correction capabilities. The perceived video quality is estimated based on the distortion calculation at the encoder. The transmission power on each bearer is controlled to maximize the expected perceived video quality for a given operating condition. The algorithm´s performance is evaluated for MPEG-4 coded video transmission over a simulated UMTS network. Simulation results show that the joint UEP and UPA scheme is more energy efficient than applying them individually.
Keywords :
3G mobile communication; cellular radio; error correction; video streaming; videotelephony; MPEG4 coded video transmission; UMTS; direct-sequence CDMA cellular networks; encoder distortion calculation; energy efficient video telephony; error correction; joint UEP/UPA algorithm; multiple radio bearers; perceived video quality; unequal error protection; unequal power allocation; 3G mobile communication; Energy efficiency; Error correction; Error correction codes; Interference; MPEG 4 Standard; Motion compensation; Physical layer; Telephony; Video sequences;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1391415
