University of Khartoum

Optimization of Tracking Area List Design for Reducing Total Signaling Overhead in LTE Systems

Optimization of Tracking Area List Design for Reducing Total Signaling Overhead in LTE Systems

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Title: Optimization of Tracking Area List Design for Reducing Total Signaling Overhead in LTE Systems
Author: Osman, Lamia Osman Widaa
Abstract: The aim of this thesis is to minimize the overall signaling overhead in LTE system by the development of a Tracking Area List (TAL) design optimization with budget constrain algorithm, in this algorithm the concept of the local search technique was used to return the optimum TAL design from a set of different designs. For optimum TAL design a cell may change its current Tracking Area (TA) which causes service interruption for UEs in the cell, a budget constrain parameter B was introduced to define the maximum number of cells that may change TAs while maintaining improved performance. Markov mobility model was used for User Equipment (UE) mobility modeling, and the data required for modeling was cell load and handover data, which are statistical data and may be obtained from the network management system. A trace matrix was implemented to trace 6000 UEs in a period of one hour. Results obtained from the proposed algorithm was in the form of tables and graphs, each table shows the calculation of the location update cost, paging cost, and the overall signaling overhead for both the standard design and the design obtained from the proposed algorithm . It found that for B equal to 50% of the total number of UEs in the network the algorithm gave reduction in the overall signaling overhead with 25% to 30% better than the standard tracking area design. And for large values of B the algorithm showed better performance. From the graphs obtained it found that when the probability that UEs will be paged the overall signaling overhead increase
Description: 126page
URI: http://khartoumspace.uofk.edu/123456789/16802
Date: 2015-10-29


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