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Networked video applications have become more and more popular. However, most commercially available video on demand (VOD) solutions still lack trick play features (fast forward, fast rewind etc.), because it usually needs high processing complexity and huge consumption of network bandwidth to support trick play function. On the other hand, H.264 Scalable Video Coding (SVC) will be adopted in more...
A path calculation element that calculates the routes for hierarchical electrical and optical paths is proposed. It responds actively to the physical impairments so that the end-to-end performance of IP traffic is ensured.
In this paper, we propose a P2P-based content distribution mechanism for video-on-demand service in IPTV. Different from traditional P2P-based content distribution mechanisms, our solution mainly focuses on how telecom operators utilize P2P technology to construct/enhance their own content delivery network for IPTV. The proposed mechanism takes into account the influence on the design of P2P mechanism...
With the rapid growth of bandwidth requirement for mobile multimedia services, broadcast communication infrastructure is desired as one of the best solutions for avoiding communication congestion. Integrated communication and broadcast network (ICBN), consisting of broadcast network and communication network, is one of the solutions. However, in reliable multicast service over ICBN, feedbacks from...
Currently, Internet protocol TV (IPTV) has launched an evolution of TV consumers' experience. IPTV can not only provide high quality video service like high definition television (HDTV), but also offer much more flexible value-added service such as Video on Demand (VoD), and Personal Video Recording (PVR). Among these new features, PVR is one of the most attractive functions for consumers. With PVR...
This paper presents an enhanced EPON with storage ONU, which can store video in local storage ONU through checking the logical link identifier. By sending video from local storage, EPON downstream bandwidth efficiency is improved.
Switching the work mode of ONU, our algorithm keeps the upstream DBA complexity low and increases the user number by eight times. Simulation shows that the average packet delay is less than 200 mus.
In this paper we propose a hierarchical architecture of the return channel in ICBN and an NAK-based hierarchical ARQ scheme (H-ARQ). The H-ARQ scheme can alleviate the NAK implosion and balance the retransmission traffic between broadcast and communication networks. The users are divided into regions in the communication network, and each region has a Local Recovery Router (LRR), which cooperates...
Ethernet passive optical network (EPON) is an emerging high-speed access network technology that can provide an ideal transmission platform for high- bandwidth applications such as IPTV (internet protocol television). To deploy the carrier-grade IPTV service, especially HDTV (high definition TV), it is very essential to construct a controllable multicast architecture for IPTV service over EPON. In...
In this paper, an algorithm of dynamic bandwidth allocation is proposed for group services in passive optical network, where group bandwidth limitation is used to limit the total bandwidth for a group of users, instead of general individual bandwidth limitation for each user. Simulation results show that proposed group dynamic bandwidth allocation algorithm provides better quality of service for grouped...
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