QoS Constraint Routing Protocols for Mobile Ad Hoc

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QoS Constraint Routing Protocols for Mobile Ad Hoc

• Igli Tafaj

2
Introduction

• Which is the aim of this paper?
• What is MANET?
• Classification of Multicast Routing Protocol?
• What is MAODV?

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Some QoS Multicast Routing Protocols

• QAMNet
• QMR
• QMRP
• AQM

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The dynamism of Routing Protocols
TAG REQ_PKT FLAG_FW

• Path selection depend on
• Stability of neighbours node
• Power level (batery)
• Buffer Level (overhead)

Each forwarding packet should have a reply, in
which could determine the appropriate selected
path
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MAODV-Extension

• Route Discovery
• Path Selection
• Hop Count
• Power Level
• Buffer Level
• Stability Level
• Cost
• Class

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L2QoS

• The selection of path based on QoS metrics
• The metrics depends entirely on MAC Sub layer
  (Layer_2)
• On these metrics supported MAODV
• MAODV Extended based on some featuring of
  Network and Application metrics mixed
• Network Metrics depends on maximum hop count
  metric
• Application Metrics depends on cost of some
  concave and additive metrics like Bandwidth,
  Delay etc

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Experiment Envirement

• Operating System Linux Red Hat 9.0
• NS2 version ns-allinone-2.26
• The simulation environment is
• 1) Area 1500 x 300 meters
• 2) Number of nodes 60
• 3) Simulation duration 900 seconds
• 4) Number of repetitions 4
• 5) Physical/Mac Layer IEEE 802.11 at 2Mbps, 250
  meter transmission range

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Experiment Envirement

• 6) Mobility model random waypoint model with no
  pause time, and node movement speed 0m/s, 1m/s or
  20m/s.
• 7) Each sender sends 2 multicast data packets
  per second with each packet 256 bytes long

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Experiment Envirement

• 8) All receivers join a single multicast group
  at the beginning of the simulation, and the
  senders start sending data 30 seconds later.
  After 900 seconds, all senders stop transmitting
  data
• 9) Only multicast traffic exists in the
  simulation.

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Implementation

• Network Layer Metrics
• Power powermin(path.power, power)
• Buffer path.bufferhoppath.bufferbuffer/hop1
• Stability path.stabmax(path.stab,stab)
• Application Layer Metric
• Throughputtotal no.of bit8 (from the Start
  time-End time)

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Simulation Graphs
Average end-to-end delay vs speed
PDR vs Speed
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Simulation Graphs
PDR vs Nr of Nodes
Average end-to-end delay vs speed
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Simulation Graphs
Throughput vs Nr of Nodes
PDR vs Nr of Nodes
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Conclusions

• QoS-MAODV, the multicast routing protocol is the
  extension of MAODV with the QoS support
• The network layer metrics is involved in the path
  discovery to find a QoS path to the destination.
• The path with the highest stability is the
  preferred path. If more than one path is found
  the destination node selected the path with the
  highest power level.

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Conclusions

• Regarding the application requirements, if the
  application is delay sensitive then the path with
  the minimum delay is chosen
• For the application with throughput constrained
  the path with maximum bandwidth is selected
• With no constraint any path is chosen by the
  destination.

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Conclusions

• The protocol balanced the routing load and also
  minimized the consumption of resources.
• As a future work, different number of flows can
  be analyzed with different network scenarios.