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A QoS-Oriented Distributed Routing Protocol for Hybrid
Wireless Networks
ABSTRACT:
As wireless communication gains popularity, significant research has been devoted
to supporting real-time transmission with stringent Quality of Service (QoS)
requirements for wireless applications. At the same time, a wireless hybrid network
that integrates a mobile wireless ad hoc network (MANET) and a wireless
infrastructure network has been proven to be a better alternative for the next
generation wireless networks. By directly adopting resource reservation-based QoS
routing for MANETs, hybrids networks inherit invalid reservation and race
condition problems in MANETs. How to guarantee the QoS in hybrid networks
remains an open problem. In this paper, we propose a QoS-Oriented Distributed
routing protocol (QOD) to enhance the QoS support capability of hybrid networks.
Taking advantage of fewer transmission hops and anycast transmission features of
the hybrid networks, QOD transforms the packet routing problem to a resource

2. scheduling problem. QOD incorporates five algorithms: 1) a QoS-guaranteed
neighbor selection algorithm to meet the transmission delay requirement, 2) a
distributed packet scheduling algorithm to further reduce transmission delay, 3) a
mobility-based segment resizing algorithm that adaptively adjusts segment size
according to node mobility in order to reduce transmission time, 4) a traffic
redundant elimination algorithm to increase the transmission throughput, and 5) a
data redundancy elimination-based transmission algorithm to eliminate the
redundant data to further improve the transmission QoS. Analytical and simulation
results based on the random way-point model and the real human mobility model
show that QOD can provide high QoS performance in terms of overhead,
transmission delay, mobility-resilience, and scalability.
EXISTING SYSTEM:
Reservation-based QoS routing protocols have been proposed for MANETs that
create routes formed by nodes and links that reserve their resources to fulfill QoS
requirements. Although these protocols can increase the QoS of the MANETs to a
certain extent.
DISADVANTAGES OF EXISTING SYSTEM:
 Cannot provide QoS-guaranteed services.
 Suffer from invalid reservation and race condition problems .

3.  Invalid reservation problem means that the reserved resources become
useless and Race condition problem means a double allocation of the
same resource to two different QoS paths.
PROPOSED SYSTEM:
 In this paper, we propose a QoS-Oriented Distributed routing protocol
(QOD) to enhance the QoS support capability of hybrid networks.
 Taking advantage of fewer transmission hops and any cast transmission
features of the hybrid networks, QOD transforms the packet routing problem
to a resource scheduling problem.
ADVANTAGES OF PROPOSED SYSTEM:
 QOD can provide high QoS performance in terms of overhead, transmission
delay, mobility-resilience, and scalability.
SYSTEM ARCHITECTURE:

4. SYSTEM REQUIREMENTS:
HARDWARE REQUIREMENTS:
 System : Pentium IV 2.4 GHz.
 Hard Disk : 40 GB.
 Floppy Drive : 1.44 Mb.
 Monitor : 15 VGA Colour.
 Mouse : Logitech.
 Ram : 512 Mb.
SOFTWARE REQUIREMENTS:
 Operating system : Windows XP/7.
 Coding Language : C#.net
 Tool : Visual Studio 2010
 Database : SQL SERVER 2008

5. REFERENCE:
Ze Li, and Haiying Shen,“A QoS-Oriented Distributed Routing Protocol for
Hybrid Wireless Networks”, IEEE TRANSACTIONS, VOL. 13, NO. 3,MARCH
2014.