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Performance analysis of voice and video streaming
in wireless mesh and ad hoc networks
Sureshbabu Ramalingam, Lakshmikanth Yerradoddi, Subramanian Srinivasan
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a wireless mesh network and in a ad-hoc network by streaming
Abstract— Wireless mesh networks are the next step in the
evolution of wireless architecture, delivering wireless
services for a large variety of applications in personal,
local, campus, and metropolitan area. Ad hoc wireless
networks are increasingly gaining importance due to
their advantages such as low cost and ease of
deployment .In this paper, we present a detailed simulation
study of the performance of voice and video streaming in
ad hoc and wireless mesh networks using predominant
mesh routing protocols being considered in IEEE 802.11s:
Ad hoc on demand distance vector(AODV) and optimized
link state routing protocol(OLSR) in ns2(Network
simulator) environment. We also implement hardware
configuration of the mesh routers.
Index Terms— Video streaming, Ad hoc, Wireless
mesh networks, Network simulator(ns2).
INTRODUCTION
An ad hoc network is characterized by its fully distributed
control mechanisms and self-organized behavior. Such a
network is expected to work in the absence of any
infrastructure by autonomously creating multihop paths for
packet delivery. A wireless mesh network, as a variant of
Mobile Ad hoc Networks (MANET), is an IEEE 802.11-based
infrastructure network in which Access Points (APs) and
stations (STA or hosts) can relay messages on behalf of other
APs in ad hoc fashion to create a self-configuring system that
extends the coverage range and increases the available
bandwidth.The Ad hoc On Demand Distance Vector (AODV)
routing algorithm is a routing protocol designed for ad hoc
mobile networks. AODV builds routes using a route request /
route reply query cycle. When a source node desires a route to
a destination for which it does not already have a route, it
broadcasts a route request (RREQ) packet across the network.
The Optimized Link State Routing Protocol (OLSR) is
developed for mobile ad hoc networks. It operates as a table
driven and proactive protocol, thus exchanges topology
information with other nodes of the network regularly. In this
paper, we evaluate the performance of these two algorithms in
voice and video.
EXPERIMENTAL SETUP
We conduct simulation experiments using the network
simulator ns2. ns2 is a widely used tool to simulate the
behavior of wired and wireless networks. A discrete event,
packet-level simulator targeted at networking research
supports the simulation of intserv/diffserv, Multicast,
Transport, Applications, and Wireless (fixed mobile, satellite).
Ns2 is an open ware, based on two languages (an objectoriented simulator C++), and OTcl (object-oriented Tcl)
interpreter. The performance analysis of AODV and OLSR
algorithms, in terms of traffic load and host mobility, is
compared for voice transmission and also for video
transmission in wireless mesh network .Their performance is
also compared in wireless Ad hoc network environment.
Hardware implementation of mesh routers starts with
connecting the mesh routers to existing router having ip
address of 192.168.254.1. We get the firmware of the router
from www.qcsmesh.com and we work on that to join to
existing mesh network and provide authentication to the users.
PROJECT PLAN
We did a feasibility study on Wireless mesh networks and
Ad hoc networks and finalized to do the project mentioned
above. This project is being done by three member team, and
the plan is to study and implement the material equally by all
the members of the group. We plan to complete the project by
April first week. The project report will be completed in one
week time frame.
REFERENCES:
[1] Jiwen chen, yeng-zhong Lee, Mario perla
“Performance comparison of AODV and OFLSR in
wireless networks”
[2] David remondo “Wireless adhoc Networks”
[3] Raad al Turki and Rashid mahmood “Multimedia
Ad hoc networks :Performance analysis”
[4] Ns2 tutorial-http://www.isi.edu/nsnam/ns/
[5] C.K.Toh “ad hoc mobile wireless networks
protocols and systems”
[6] Luks klein-Berndt “A quick guide to AODV
routing”
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[7] www.qcsmesh.com