QOD PHASE-1 FINAL PPT

QOS Enhancement in Hybrid
Network Using Distributed Protocol
Guided By
Mr. K. MURALISANKAR, M. E.,
Assistant Professor,
Dept of Computer Science and Engg.,
SVS College of Engineering.
Presented By
S.AAKASHAM
722012405001
II M. E. ,CSE
SVS College of Engineering.

INTRODUCTION
 Hybrid networks is integrate MANETs and infrastructure
wireless networks
 It have proven to be a better network structure for the next
generation networks
 It can act Base station and Ad hoc according to the
environment conditions
 The widespread use of mobile devices the increasing demand
for mobile multimedia streaming services
 The future of real time need of high Quality of Service (QoS)
support in wireless and mobile networking environments

INTRODUCTION Cont…
 The QoS support reduces end to end transmission delay and
enhances throughput to guarantee the seamless communication
between mobile devices and wireless infrastructures
 Specifically, infrastructure networks improve the scalability of
MANETs, while MANETs automatically establish self-organizing
networks, extending the coverage of the
infrastructure networks

ABSTRACT
 The system reduces the transmission delay of the each
node in hybrid network
 It also reduces the transmission time and redundant
data
 Then increase the transmission throughput and
network bandwidth
 To introduce a QOD algorithm to achieve high QoS
performance in hybrid network

DRAWBACK OF EXISTING SYSTEM
 Infrastructure wireless networks: The node negotiation,
admission control, resource reservation, and Priority
scheduling of packets
 MANETs: The user mobility, channel variance errors, and
limited bandwidth
 MANETs: Reservation-based QoS routing protocols suffer
from invalid reservation and race condition problems

PROPOSED SYSTEM
 Utilizes the reservation-based QoS routing protocols in hybrid
networks
 These mainly focuses the invalid reservation and race
condition problems
 Introduce to QoS-Oriented Distributed routing protocol
(QOD) is aiming to reduce transmission time and increase
network capacity
 QOD , if a source node is not within the transmission range of
the AP
 A source node selects nearby neighbors that can provide QoS
services to forward its packets to base stations

PROPOSED SYSTEM Cont…
 The source node schedules the packet streams to neighbors
based on their queuing condition, channel condition, and
mobility
 The neighbors then forward packets to base stations, which
further forward packets to the destination
 QOD is the first work for QoS routing in hybrid networks
 QOD is makes five contributions

QoS-Oriented Distributed routing
protocol(QOD)
1. QoS-guaranteed neighbor selection algorithm
 The algorithm selects qualified neighbors to guarantee
QoS routing
 Get an allocation set A :
Uas(i)* Wi : available workload rate source node needs to
distribute its packets to the Nq
Ai : workload rate allocation from source node to immediate node
Wg : the packet generating rate of the source node

protocol(QOD)
2. Distributed packet scheduling algorithm
 It assigns earlier generated packets to forwarders with
higher queuing delays, while assigns more recently
generated packets to forwarders with lower queuing delays
to reduce total transmission delay
 E.g.: 3 packets distributed

protocol(QOD)
3. Mobility-based segment resizing algorithm
 The source node that adaptively adjusts segment size
according to node mobility in order to reduce transmission
time
 The size of a packet Sp sent from a node to its neighbor
nodes i as following :
 γ : Scaling parameter an
 υi : The mobility speed of the source node and intermediate node
 =1 kb

protocol(QOD)
4. Soft-deadline based forwarding scheduling algorithm
 An intermediate node first forwards the packet with the
least wait time node. It’s increase the transmission
throughput
 The slack time of a packet p is defined as :
Dp : Deadline of packet p
 t : The current time
 c’ : The remaining packet transmission time of the packet

protocol(QOD)
5. Data redundancy elimination based transmission
 This algorithm eliminates the redundant data to improve the
QoS of the packet transmission

ADVANTAGES OF PROPOSED SYSTEM
 The QOD Protocol achieved low overhead and transmission
delay
 Also provided high scalability in hybrid network

SNAPSHOT FOR DETECTING
SOURCE AND DESTINATION

SNAPSHOT FOR DATA TRANSMISSION
WITHOUT MOBILITY

SNAPSHOT FOR DATA TRANSMISSION
WITH MOBILITY

RESULTS
X axis = Mobility Y axis = Throughput

RESULTS Cont…
X axis = Mobility Y axis = Delay

Thank You For Listening!
Any Questions?

REFERENCES
[1] A. Parekh and R. Gallager. A generalized processor sharing
approach to flow control. In Proc. of Infocom, 1992.
[2] R. Braden, D. Clark, and S. Shenker. RFC1633: Integrated
services in the internet architecture: an overview. IETF, 1994.
[3] J. C. R. Bennett and H. Zhang. WF2Q: Worst-case fair
weighted fair queuing. In Proc. of Infocom, 1996
[4] D. B. Johnson and D. A. Maltz. Dynamic source routing in ad
hoc wireless networks. IEEE Mobile Computing, 1996.
[5] C. E. Perkin, E. M. Royer, and S. R. Quality of service in ad
hoc On-demand distance vector routing. IETF, 2001.

REFERENCES Cont..
[6] T. Reddy, I. Karthigeyan, B. Manoj, and C. Murthy. Quality
of service provisioning in ad hoc wireless networks: a survey
of issues and solutions. Ad hoc Networks, 2006.
[7] C. Shen and S. Rajagopalan. Protocol-independent multicast
packet delivery improvement service for mobile ad hoc
networks. Ad Hoc Networks, 2007.
[8] Y. E. Sung, C. Lund, M. Lyn, S. Rao, and S. Sen. Modeling
and understanding end-to-end class of service policies in
operational networks. In Proc. of SIGCOMM, 2009.

REFERENCES Cont..
[9] Y. Wei, M. Song, F. R. Yu, Y. Zhang, and J. Song. Distributed
optimal relay selection for QoS provisioning in wireless
multihop cooperative networks. In Proc. of GLOBECOM,
2009.
[10] Z. Li and H. Shen. A QoS-oriented distributed routing
protocol for hybrid networks. In Proc. of MASS, 2010.

QOD PHASE-1 FINAL PPT

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