Fast IPTV channel switching using hot-view and personalized channel preload over IEEE 802.16e
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RESEARCH
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Fast IPTV channel switching using hot-view and personalized channel preload over IEEE 802.16e Sheng-Tzong Cheng, Chih-Lun Chou, Gwo-Jiun Horng* and Tun-Yu Chang
Abstract 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 article, we 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, we 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. Finally, the experimental results show the performance of the proposed algorithm. Keywords: IPTV, channel-switching, IEEE802.16e, hot-view
Introduction With the development of network services, transferring materials have evolved from data to multimedia. Recently, the idea of triple-play, which consists of data, audio, and video, is the main issue. The Internet protocol television (IPTV) service is derived from this idea. IPTV offers service over IP networks, and offers viewers interactive multimedia services such as program voting and advertisements. Overall, IPTV depends on the IP network and whether it can support unicast, multicast, broadcast multimedia, games, VOIP, etc. [1-3]. In the wired IPTV service, the service terminals consist of a set-top box and television in the home. But for mobile IPTV service, the terminals are wireless networks, such as 3G, Wi-Fi, or WiMAX. When comparing wired and mobile IPTV services, the former has sufficient bandwidth to permit system operators to directly broadcast all channels to viewers. Viewers only need to tune antenna frequency for channel changing. On the other hand, for mobile IPTV there is the issue of insufficient bandwidth, forcing system operators to broadcast * Correspondence: [email protected] Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan
partial channels. These issues prompt discussion, such as how to effectively allocate channels to increase the channel’s utility rates. Consider this scenario, a user is watching channel #1 and after a while he wants to change to channel #2. Between pressing the switching button on the remote controller and the time it takes for the monitor to display the program on channel #2, the following events occur: [4-6]. (1) Streaming encoding and decoding (2) Channel zapping time (3) Channel switching algorithm (4) Quality of experience (QoE) In this article, we put emphasis on the first and second sections, and propose an algorithm to handle the c
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