Abstract
With great technologies, emerge new needs and requirements. The progress achieved in Access broadband rates accentuated the demand on IPTV (Internet Protocol Television) services specially Video on Demand (VOD) and Time Shift TV (TSTV) which led subsequently to a great need for efficiency in the use of bandwidth consumed by those services. Optimization solutions are considered by IPTV service providers to lighten the service load especially on Access Nodes uplinks. This paper describes an optimization of TSTV dedicated bandwidth based on a peer-assisting TSTV content delivery, a solution in which the users STBs (set-top-boxes) assist the central TSTV servers in the service fulfillment. For this purpose, for each TSTV request, the STB will be receiving the TSTV stream from a neighbor STB instead of the central server. By using this method, the unicast traffic will not pass through the IP network; it will be a peer-to-peer communication within the access network. Extensive simulation results were included to illustrate the validity of the proposed new solution.
Highlights
IntroductionThe IPTV service has become widely used as a result of the variety of provided services such as multicast TV, Video on Demand (VOD), and Time Shift TV (TSTV) taking advantages from the IP network expansion and the increase of broadband users [1]
The IPTV service has become widely used as a result of the variety of provided services such as multicast TV, Video on Demand (VOD), and Time Shift TV (TSTV) taking advantages from the IP network expansion and the increase of broadband users [1].Traditional TV uses large bandwidth with no user specific video delivery
We presented in this paper a new solution to manage efficiently the bandwidth resources of the unicast traffic on the IP network consumed by TSTV service by implementing the unicast peer-assisted solution on the user STB
Summary
The IPTV service has become widely used as a result of the variety of provided services such as multicast TV, Video on Demand (VOD), and Time Shift TV (TSTV) taking advantages from the IP network expansion and the increase of broadband users [1]. In [5], authors proposed a design of an IPTV multicast system for the Internet backbone network, by using a resource reservation algorithm to reserve bandwidth. Using DHCP (Dynamic Host Configuration Protocol) [6] or PPPOE (Point-to-Point Protocol over Ethernet) [7] and the access granted, when a user selects a specific channel (turning on his STB or zapping), his STB is correspondingly sending a request to join the corresponding multicast group using IGMP protocol (Internet Group Management Protocol) [8, 9]. The IPTV platform that received the request responds by delivering the RTP (Real Time Transport Protocol) [10] encapsulated video stream in IP packets to the user passing by the AGR (Aggregated Router), AN (Access Node), and HG (Home Gateway). (iii) Buffering delay: the time needed to buffer the content before displaying it on the user TV
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