This document proposes a novel technique called Adjacent Pair Priorities (APP) to estimate weight factors for quality of service parameters in vertical handoff decision algorithms. The APP technique allows users to set relative priority levels for adjacent pairs of QoS parameters in descending order using an exponential mapping. This adaptive approach controls the width of the weight distribution to provide flexibility for users. The document outlines the system requirements, block diagram, modules and references several research papers on vertical handoff decision schemes and network selection algorithms.

1. ADAPTIVE WEIGHT FACTOR
ESTIMATION FROM USER PREFERENCES
FOR VERTICAL HANDOFF DECISION ALGORITHMS
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2. SCOPE OF THE PROJECT:
To Estimate the weight factors for quality of service
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parameter in VERTICAL HANDOVER MECHANISMS
using Adjacent Pair Priorities (APP) technique.

3. ABSTRACT
 Estimating weight factors for QoS parameters plays
an important role in the effectiveness of vertical
handoff decision algorithms.
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 A novel weight estimation technique, which can
adaptively control the spanning of the weights in
response to user preference.
 Our results show the supremacy of the technique
against the state-of-the-art in achieving wider
spanning of the expected values of all QoS parameters
under consideration.

4. PROBLEM IDENTIFICATION:
AHP based weight estimation is so far the most
popular technique as it allows user to set relative
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importance between pairs of parameters using a
fundamental linear scale

5. PROPOSE SYSTEM
 A novel weight estimation technique, which can avoid all the above
mentioned limitations by allowing users to set relative priority for only
adjacent pair of QoS parameters in descending order of priority and
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quantifying the relative priority levels using an exponential mapping
with a user-defined exponent.
 Consequently, the proposed Adjacent Pair Priorities (APP) technique
can adaptively control the width of the spanning of estimated weights
to provide the ultimate flexibility for users to control the weight
distribution.
 Markov Decision Process (MDP)

6. SYSTEM REQUIREMENT & SPECIFICATION:
Hardware Requirements: Software Requirements:
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Processor Type : Pentium -IV Operating System : Linux – red hat 9.0
Speed : 2.4 GHZ
Ram : 128 MB Programming Package : C++ , TCL
RAM
Hard disk : 20 GB HD Tool Used : Vmware Work station
Version : NS2 2.27, 2.29 , 2.34

7. Select Best Network form
exsisting Application and
traffic
BLOCK DIAGRAM:
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Qos Parameter
Avg. Jitter (ms) Average Delay Average.PDR Avg. Throughput
Adjacent Pair Priorities Handover
(APP) technique
Technique
GPRS WLAN UTMS

8. MODULES :
1. Design Of heterogeneous network.
2. Vertical Handoff Decision Algorithms
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3. Implementation Of Adjacent Pair Priorities
(APP) Technique.
4. Paramètres estimation
5. Comparaison Of QOS Paramètres

9. REFERENCES
[1] Y. Chen, J. Ai, and Z. Tan, “An Access Network Selection Algorithm Based on
Hierarchy Analysis and Fuzzy Evaluation”, in Proc.WCSP, Nanjing, November
2009.
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[2] S. Lee, , K. Sriram, K. Kim, Y. H. Kim, and N. Golmie, “Vertical Handoff Decision
Algorithms for Providing Optimized Performance in Heterogeneous Wireless
Networks ”, IEEE Transaction of Vehicular Technology, vol. 58, no. 2, pp. 865-881,
February 2009.
[3] R.Tawil, O. Salazar and G. Pujolle, “Vertical Handoff Decision Scheme Using
MADM for Wireless Networks”, Proc. IEEE WCNC, pp. 2789- 2792, March 2008.
[4] S. Yan, C. Shanzhi, L. Yuhong, Y. Lei, and D. Decail, “An Application- Oriented
Cooperative Vertical Handoff Decision Method for Multi interface Mobile
Terminals”, in Proc. ITST, June 2007
[5] B. Chang, and J. Chen, “Cross-Layer-Based Adaptive Vertical Handoff With
Predictive RSS in Heterogeneous Wireless Networks ”, IEEE Transaction of
Vehicular Technology, vol. 57, no. 6, pp. 3679-3692, November 2008.