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Modeling and Cost Analysis of an Improved Movement-Based Location Update Scheme in Wireless Communication Networks
WANG Xian 1 *,JIANG Wei 2,YUAN Wei-Na 3
1.School of Information Science and Technology, Southwest Jiaotong University, ChengDu 610031
2.School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
3.School of Information Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
*Correspondence author
#Submitted by
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Funding: Specialized Research Fund for the Doctoral Program of Higher Education of China （No.20090184120020）
Opened online: 6 January 2013
Accepted by: none
Citation: WANG Xian,JIANG Wei,YUAN Wei-Na.Modeling and Cost Analysis of an Improved Movement-Based Location Update Scheme in Wireless Communication Networks[OL]. [ 6 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4508970
 
 
An improved movement-based location update (IMBLU) scheme was proposed in the literature to tackle the vulnerability of the original movement-based location update (OMBLU) scheme, which performs a location update (LU) when the number of cells crossed reaches a movement threshold, to the ping-pong effect, a synonym for the phenomenon that a user equipment (UE) moves back-and-forth between adjacent cells. In the IMBLU scheme the criterion for performing an LU is that the number of different cells visited reaches the movement threshold. Prior to implementing the IMBLU scheme in wireless communication networks, first we need to determine the optimal movement threshold that minimizes the signaling cost of the IMBLU scheme incurred by LUs and paging. Therefore, a comprehensive mathematical model is required. This paper devotes to this requirement by developing such a model to analyze the signaling cost of the IMBLU scheme. We characterize UE mobility by a one-dimensional random walk model and derive closed-form analytical formula for the signaling cost of the IMBLU scheme, based on which we carry out a numerical to investigate the influence of relevant parameters on the signaling cost. It is observed that the signaling cost is a downward convex function with respect to the movement threshold, that the superiority of the IMBLU scheme over the OMBLU scheme is proportional to the intensity of the ping-pong effect, as well as that the variance of cell residence time exerts noticeable influence on the signaling cost only in the scenario of low mobility. This paper can guide the implementation of the IMBLU scheme in wireless communication networks.
Keywords:wireless communication technology; movement-based location update; ping-pong effect; modeling; signaling cost
 
 
 

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