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The Internet Protocol TeleVision (IPTV) is emerging as one of the most promising applications over next generation networks. The recently released IEEE 802.16d/e is capable of ensuring high bandwidths and low latency, making it suitable for delivering multimedia services. In addition, it also provides wide area coverage, mobility support, and non-line-of-sight operation. In this paper, the authors deliver IPTV streaming over 802.16 wireless systems and propose a simple but effective IPTV channel-switching algorithm to keep the channel zapping time in a tolerable range. In addition, they discuss how to allocate channels in the limited bandwidth over wireless networks, such as 802.16. The proposed algorithm is based on hot-view channel and personal favorite channel preloading to reduce the network delay and achieve the goal of fast channel switching.
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