DocumentCode :
3102182
Title :
A Semi-Distributed Fast Channel Change Framework for IPTV Networks
Author :
Azgin, Aytac ; Altunbasak, Yucel
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fYear :
2011
fDate :
July 31 2011-Aug. 4 2011
Firstpage :
1
Lastpage :
8
Abstract :
In IPTV networks, channel change latency is a major concern for achieving the desired quality of experience at the subscribers. Since IPTV connections are established over limited capacity links, the number of channels available to each subscriber´s use, at any given point in time, is strictly limited. As a direct consequence of this limitation, channel change requests need to go through the IP infrastructure, causing significant, and oftentimes unacceptable, channel switching delays. To minimize this latency, various approaches have been proposed. Among these approaches, server-based approaches are shown to achieve the best latency performance. However, since server-based approaches typically utilize unicast-based delivery techniques, they are susceptible to introducing significant overhead at the designated servers, leading to scalability related problems. In this paper, we address these problems by proposing a semi-distributed, i.e., user-assisted server-based, channel change framework. The proposed approach integrates the capabilities of a dedicated channel change server with that of IPTV subscribers to create a resource-efficient and scalable channel change framework. Through extensive simulations, we showed that the proposed framework can achieve sufficiently low channel change latency values, while significantly improving the servicing capacity of the network when compared to server-based-only channel change policies.
Keywords :
IPTV; channel capacity; telecommunication switching; IP infrastructure; IPTV connections; IPTV networks; IPTV subscribers; capacity links; channel change latency values; channel change requests; channel switching delays; dedicated channel change server; designated servers; latency performance; network servicing capacity; quality of experience; resource-efficient channel change framework; scalability related problems; scalable channel change framework; semidistributed channel change framework; semidistributed fast channel change framework; server-based approaches; server-based-only channel change policy; unicast-based delivery techniques; user-assisted server-based channel change framework; Availability; Bandwidth; Delay; IPTV; Servers; Switches; Synchronization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Communications and Networks (ICCCN), 2011 Proceedings of 20th International Conference on
Conference_Location :
Maui, HI
ISSN :
1095-2055
Print_ISBN :
978-1-4577-0637-0
Type :
conf
DOI :
10.1109/ICCCN.2011.6006088
Filename :
6006088
Link To Document :
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