Dissertation > Excellent graduate degree dissertation topics show

Study on Position-Based Vertical Handoff Algorithm in Heterogeneous Networks

Author: SunBo
Tutor: WangGang
School: Jiangsu University
Course: Communication and Information System
Keywords: Heterogeneous Network Vertical Handoff Decision-Making Analytic Hierarchy Process Localization
CLC: TN929.5
Type: Master's thesis
Year: 2008
Downloads: 163
Quote: 3
Read: Download Dissertation


Vertical handoff is the key characteristic and technology of Wireless Mobile network.Traditional handoff mechanism can not be directly applied to heterogeneous network.Based on the systematical summary and analysis of the latest researches on vertical handoff,uses the heterogeneous network in which TD-SCDMA and WiMAX coexist as the background,this dissertation focuses on the issues of performance analysis of the heterogeneous network vertical handoff and heterogeneous network positioning algorithm.The major contributions of this dissertation are as follows:(1) Performance analysis of representative algorithms.The existing handoff algorithms are analyzed and a set of performance evaluation models for vertical handoff in heterogeneous networks are provided.Two metrics,matching ratio and ping-pong number,were defined to evaluate the performance of vertical handoff algorithms.Based on the proposed models and metrics,the performance of two vertical handoff algorithms was compared:hysteresis based algorithm and dwelling-timer based algorithm.Simulation results show this switch of single decision-making does not necessarily guarantee the reasonableness of handoff,we need to study a new method of analysis.(3) The QoS optimization algorithm based on AHP and its improvement.This dissertation uses AHP to analysis multiple attribute decision-making,provides a QoS optimization algorithm.Furthermore,this dissertation makes improvement of the QoS optimization algorithm combined with the combination of location information. The algorithm can evaluate the performance of network links comprehensively and select the most appropriate one for user’s services requirement.Simulation results show that this algorithm can reduce the number of handoffs,as well as make mobile nodes switch to a better network link.(4) A TOA location algorithm under NLOS conditions is presented in the end. We determine the location of the nodes in different network,use comprehensive results of the independent node position to get the nodes’ location.Simulation results show that some factors have obviously impact to localization accuracy,such as the number and location of base station.The TOA location algorithm will achieve a comparable result when there are more WiMAX base stations in network.

Related Dissertations

  1. Research on Dam-Break Probability Analysis Method for Dangerous Reservoir,TV697
  2. Technology for Localization Attack Detection in Wireless Sensor Networks,TP212.9
  3. cDNA Cloning, Expression of vp5 and vp7 Genes and Subcecullar Localization of VP5 and VP7 Proteins in Grass Carp Reovirus,S941.41
  4. Research on Index System and Evaluation of University Office Greening,G647
  5. Large the Hongshan iron ore mine personnel tracking positioning system optimization study,TN929.5
  6. Interpretation of Chinese TV Marriage Program under the Influence of Consumer Culture,G222.3
  7. A Study on the Development of the Resources Localilzation of the Middle School Art Teaching in Heyuan,G633.955
  8. Dalian Waters Fire-fighting Forces Deployment Scheme Research,U698.4
  9. Genetic Model Analysis and QTL Mapping of Agronomic and Quality Traits in Soybean,S565.1
  10. A Discussion on the Local Government’s Ethical Decision-Making,D625
  11. The Application of Fuzzy Comprehensive Evaluation Based on Genetic Algorithm in Vocational Evaluation of Classroom Teaching,G712
  12. The Research on Evaluation Method of Highway Ecosystem Healthy,X826
  13. Functional Analysis of Proteins Encoded by RNA2 of Wheat Yellow Mosaic Virus,S435.121
  14. Indirect Imaging of Singlet Oxygen Generation from a Single Cell,Q2-3
  15. The Automatic Variable Fertilization System Based on the Steeper Motor,S224.2
  16. An Exploration of the Decision-making Mechanism for a Service-oriented Government,D035
  17. Analysis of Complex Networks Modeling and Its Application,O157.5
  18. Prospecting and evaluation of the initial stage of the value of the elements of the analytic hierarchy process and fuzzy comprehensive evaluation model,F426.1
  19. Expressive Characterization of Transcription Factors in Cotton Fibre Initiation and Cloning and Characterization of Three Transcription Factor Genes in Gossypium Hirsutum L.,Q943
  20. Cloning and Characterization of Photoperiod Sensitive Gene ZmELF4 in Maize,S513
  21. A Comprehensive Evaluation of Heritage Trees,S788

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
© 2012 www.DissertationTopic.Net  Mobile