INCREASING BANDWIDTH UTILIZATION IN NEXT GENERATION IPTV NETWORKS (TP-P3)

Author(s) : Ulf Jennehag (Mid-Sweden University, Sweden) Tingting Zhang (Mid-Sweden University, Sweden)

Abstract : In this paper we present a novel idea regarding transmission of next generation IPTV content. Today IPTV systems utilize a GOP structure to provide stream synchronization points for the clients, these are used when a channel switch occur. Since channel switches made by TV audiences are quite rare it is redundant to send synchronization opportunities in a GOP manner. The proposed design, synchronization frames for channel switching (SFCS), only requests synchronization frames when needed. We present a network traffic analysis model and compare it with simulations. SFCS significantly increases bandwidth utilization compared to traditional GOP system under the presented transmission environment. With SFCS the number of offered resynchronization points can be increased and provide faster channel switches with minor decreases in bandwidth efficiency.

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