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Issue No.10 - Oct. (2012 vol.11)
pp: 1508-1522
Ya-Ju Yu , Grad. Inst. of Networking & Multimedia, Nat. Taiwan Univ., Taipei, Taiwan
Pi-Cheng Hsiu , Res. Center for Inf. Technol. Innovation (CITI), Inst. of Inf. Sci. (IIS), Taipei, Taiwan
Ai-Chun Pang , Dept. of Comput. Sci. & Inf. Eng., Nat. Taiwan Univ., Taipei, Taiwan
ABSTRACT
Layer-based video coding, together with adaptive modulation and coding, is a promising technique for providing real-time video multicast services on heterogeneous mobile devices. With the rapid growth of data communications for emerging applications, reducing the energy consumption of mobile devices is a major challenge. This paper addresses the problem of resource allocation for video multicast in fourth-generation wireless systems, with the objective of minimizing the total energy consumption for data reception. First, we consider the problem when scalable video coding is applied. We prove that the problem is NP-hard and propose a 2-approximation algorithm to solve it. Then, we investigate the problem under multiple description coding, and show that it is also NP-hard and cannot be approximated in polynomial time with a ratio better than 2, unless P = NP. To solve this case, we develop a pseudopolynomial time 2-approximation algorithm. The results of simulations conducted to compare the proposed algorithms with a brute-force optimal algorithm and a conventional approach are very encouraging.
INDEX TERMS
Modulation, Resource management, Energy consumption, Streaming media, Approximation algorithms, Static VAr compensators,4G wireless systems., Energy efficiency, video multicast, scalable video coding, multiple description coding, adaptive modulation and coding
CITATION
Ya-Ju Yu, Pi-Cheng Hsiu, Ai-Chun Pang, "Energy-Efficient Video Multicast in 4G Wireless Systems", IEEE Transactions on Mobile Computing, vol.11, no. 10, pp. 1508-1522, Oct. 2012, doi:10.1109/TMC.2011.186
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