Title :
Cooperative Multicasting for Wireless Scalable Video Transmissions
Author :
Sheng-Chieh Wang ; Wanjiun Liao
Author_Institution :
Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
Cooperative multicasting is a promising technique to combat severe fading and path loss for wireless video delivery. In typical wireless video multicasting, nodes under the worst channel condition determine the video delivery quality, thereby limiting the system performance and affecting the Quality of Experience (QoE) of the users. Existing cooperative multicast schemes may not fully exploit the characteristics of scalable video over wireless networks. To tackle this problem, we propose two new cooperative multicast schemes called OppCM and CodedCM for scalable video delivery. OppCM performs opportunistic listening and conditional demodulating to enhance the system performance; CodedCM delivers layer-encoded video with multi-resolution modulation through cooperative multicasting. We analyze the system performance in terms of average outage probability for four cooperative multicast schemes, including direct multicast (for baseline comparison), pure cooperative multicasting, and the two proposed schemes OppCM and CodedCM. We also evaluate their performance via simulations. The results show that the proposed OppCM and CodedCM outperform the other two schemes, demonstrating that they are indeed promising solutions to wireless scalable video multicasting.
Keywords :
cooperative communication; demodulation; fading channels; modulation; multicast communication; quality of experience; radio networks; video coding; video communication; CodedCM; OppCM; QoE; average outage probability; baseline comparison; conditional demodulating; cooperative multicast schemes; cooperative multicasting; direct multicast; fading; layer-encoded video; multiresolution modulation; nodes; opportunistic listening; path loss; quality of experience; scalable video; scalable video delivery; system performance; video delivery quality; wireless networks; wireless scalable video transmissions; wireless video delivery; wireless video multicasting; worst channel condition; Binary phase shift keying; Multicast communication; Relays; Signal to noise ratio; Streaming media; Wireless communication; Wireless video multicast; cooperative multicast; outage probability; scalable video;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2013.071013.120245