Traditional
routing metrics designed for wireless networks are application-agnostic. In
this paper, we consider a wireless network where the application flows consist
of video traffic. From a user perspective, reducing the level of video
distortion is critical. We ask the question “Should the routing policies change
if the end-to-end video distortion is to be minimized?” Popular
link-quality-based routing metrics (such as ETX) do not account for dependence
(in terms of congestion) across the links of a path; as a result, they can
cause video flows to converge onto a few paths and, thus, cause high video
distortion. To account for the evolution of the video frame loss process, we
construct an analytical framework to, first, understand and, second, assess the
impact of the wireless network on video distortion. The framework allows us to
formulate a routing policy for minimizing distortion, based on which we design
a protocol for routing video traffic. We find via simulations and test bed
experiments that our protocol is efficient in reducing video distortion and
minimizing the user experience degradation.
AIM
The
aims of this paper are an analytical framework to, first, understand and,
second, assess the impact of the wireless network on video distortion.
SCOPE
The Scope of this paper is allows us to
formulate a routing policy for minimizing distortion, based on which we design
a protocol for routing video traffic.
EXISTING
SYSTEM
In
these protocols, one of the critical functionalities that is often neglected,
but affects the end-to-end quality of a video flow, is routing. Typical routing
protocols, designed for wireless multi hop settings, are application-agnostic
and do not account for correlation of losses on the links that compose a route
from a source to a destination node. Furthermore, since flows are considered
independently, they can converge onto certain links that then become heavily
loaded (thereby increasing video distortion), while others are significantly
underutilized. The decisions made by such routing protocols are based on only
network (and not application) parameters. As one of our main contributions, we
construct an analytical model to characterize the dynamic behavior of the
process that describes the evolution of frame losses in the GOP (instead of
just focusing on a network quality metric such as the packet-loss probability)
as video is delivered on an end-to-end path. Specifically, with our model, we
capture how the choice of path for an end-to-end flow affects the performance
of a flow in terms of video distortion. The packet-loss probability on a link
is mapped to the probability of a frame loss in the GOP. The frame-loss
probability is then directly associated with the video distortion metric.
DISADVANTAGES:
- From a user perspective, reducing the level of video distortion is critical.
- Popular link-quality-based routing metrics (such as ETX) do not account for dependence (in terms of congestion) across the links of a path; as a result, they can cause video flows to converge onto a few paths and, thus, cause high video distortion.
PROPOSED SYSTEM
In
this paper, Developing an analytical
framework to capture the impact of routing on video distortion: As our primary
contribution, we develop an analytical framework that captures the impact of
routing on the end-to-end video quality in terms of distortion Design of a
practical routing protocol for distortion-resilient video delivery: Based on our
analysis, we design a practical routing protocol for a network that primarily
carries wireless video Evaluations via extensive experiments:
We demonstrate via extensive simulations and real test bed experiments on a
multi hop 802.11a test bed that our protocol is extremely effective in reducing
the end-to-end video distortion and keeping the user experience degradation to
a minimum
ADVANTAGES
- Our simulation study shows that the distortion (in terms of PSNR) is decreased by 20% compared to ETX-based routing
- The user experience degradation due to increased traffic load in the network is kept to a minimum.
SYSTEM CONFIGURATION
HARDWARE REQUIREMENTS:-
· Processor - Pentium –III
·
Speed - 1.1 Ghz
·
RAM - 256 MB(min)
·
Hard
Disk - 20 GB
·
Floppy
Drive - 1.44 MB
·
Key
Board - Standard Windows Keyboard
·
Mouse - Two or Three Button Mouse
·
Monitor -
SVGA
SOFTWARE REQUIREMENTS:-
·
Operating
System : Windows 7
·
Front
End :
JSP AND SERVLET
·
Database
: MYSQL
·
Tool :NETBEANS
REFERENCE:
Papageorgiou,
G. Singh, S. , Krishnamurthy, S.V. , Govindan, R.. “A Distortion-Resistant
Routing Framework for Video Traffic In Wireless Multi hop Networks”, IEEE/ACM
Transactions on Networking, Volume 23, Issue 2 FEBRUARY 2014.
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