Efficient data replication for the delivery of high-quality video content over P2P VoD advertising networks
EURASIP Journal on Advances in Signal Processing
Efficient data replication for the delivery of high- quality video content over P2P VoD advertising networks
Chien-Peng Ho 0
Jen-Yu Yu
Suh-Yin Lee 0
0 Department of Computer Science, National Chiao Tung University , Hsinchu , Taiwan, R.O.C
Recent advances in modern television systems have had profound consequences for the scalability, stability, and quality of transmitted digital data signals. This is of particular significance for peer-to-peer (P2P) video-on-demand (VoD) related platforms, faced with an immediate and growing demand for reliable service delivery. In response to demands for high-quality video, the key objectives in the construction of the proposed framework were user satisfaction with perceived video quality and the effective utilization of available resources on P2P VoD networks. This study developed a peer-based promoter to support online advertising in P2P VoD networks based on an estimation of video distortion prior to the replication of data stream chunks. The proposed technology enables the recovery of lost video using replicated stream chunks in real time. Load balance is achieved by adjusting the replication level of each candidate group according to the degree-of-distortion, thereby enabling a significant reduction in server load and increased scalability in the P2P VoD system. This approach also promotes the use of advertising as an efficient tool for commercial promotion. Results indicate that the proposed system efficiently satisfies the given fault tolerances.
overlay networks; peer-to-peer systems; video-on-demand; replication; Internet advertising
1. Introduction
Recent advances in online advertising and peer-to-peer
(P2P) video-on-demand (VoD) networks, enabling peers
to watch or download internet video clips on demand,
have created considerable interest in the construction of
integrated frameworks. Online advertising channels,
such as online newspapers/magazines, keyword trigger
tools, and e-mail, have gained wide public acceptance
and considerable importance as advertising media [1,2].
However, an increasing number of internet content
providers, such as Blinkx BBTV [3], Joost [4], and
Livestation [5], are incorporating legal P2P technologies into
their delivery platform to reduce operational expenses.
In P2P VoD applications, user preferences can be
automatically derived from media usage data without the
need for direct user input, making them an excellent
system for the collection of customer information. This
enables advertisers to bid on video clips relevant to their
target market. For instance, a toy or a snack
advertisement might link to cartoon videos. Hence, a
concomitant need has arisen for the delivery of marketing
messages to attract customers to the P2P VoD
environments [6]. A P2P VoD computing environment can be
an ideal platform on which to display advertisements.
Perceptions of high video quality and a robust
environment are essential for the delivery of online advertising
in P2P VoD networks; therefore, this study attempts to
make a system that is tolerant of network errors in
terms of video enhancement and online P2P advertising
availability.
There are many ways to enable efficient and scalable
on-demand video distribution over networks, including
IP multicast, content distribution networks (CDN), and
P2P networking. Although IP multicast is an efficient
approach for a number of channels with high popularity
rankings [7], it has several drawbacks. First, IP multicast
has not been widely deployed on the internet [8].
Second, core network routers must process a considerable
number of forwarding entries when many active
multicast groups are used, resulting in increased memory
requirements and slower forward processing. Third, IP
multicast flow aggregation is not well suited to less
popular video channels (e.g., if many disjoint paths are
involved) [7]. In contrast, P2P VoD technologies have
gained immense popularity throughout the world [9-12].
P2P VoD services are fundamentally more scalable than
existing IP multicast methods when bandwidth
availability exists at the ISP backbone. The advantages of using
P2P VoD technologies for content distribution over
CDN or IP multicast are listed below:
Exploitation of the underutilized resources of
peers: Some resource owners (resourceful peers) can
become providers by making their underutilized
resources available. Peers can be frequently switched or
reconnected to resourceful peers, and all shared data
and services are accessible to other peers.
System deployability: A set of incrementally
deployable and extensible solutions bring existing P2P
systems closer to commercial production, and many
have been introduced in recent years.
Hardware economics: Traditional CDNs combine
the infrastructure for content-delivery, request-routing,
distribution, and accounting to provide an intermediate
layer of infrastructure to rapidly deliver content from
providers to end user (...truncated)