文献类型：期刊文献

英文题名：Modeling and Cost Analysis of an Improved Movement-Based Location Update Scheme in Wireless Communication Networks

作者：Wang, Xian[1];Jiang, Wei[1];Yuan, Wei-Na[2];Ferng, Huei-Wen[3]

机构：[1]Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Sichuan, Peoples R China;[2]E China Univ Sci & Technol, Sch Informat Sci & Engn, Shanghai 200237, Peoples R China;[3]Natl Taiwan Univ Sci & Technol, Dept Comp Sci & Informat Engn, Taipei 106, Taiwan

年份：2014

卷号：75

期号：4

起止页码：2607

外文期刊名：WIRELESS PERSONAL COMMUNICATIONS

收录：;EI(收录号：20141517554109);WOS:【SCI-EXPANDED(收录号:WOS:000333711900045)】；

基金：Many thanks are due to the anonymous reviewer whose comments greatly improve the quality of this paper. This work was supported by the 973 project under Grant 2012CB316100, by the National Science Foundation of China under Grant 61171096, by the Fundamental Research Funds for the Central Universities under Grant SWJTU12CX093, and by the Innovative Intelligence Base Project (111 Project) under Grant 111-2-14.

语种：英文

外文关键词：Movement-based location update; Ping-pong LU effect; Modeling; Embedded Markov chain

摘要：A movement based location update (MBLU) scheme is an LU scheme, under which a user equipment (UE) performs an LU when the number of cells crossed by the UE reaches a movement threshold. The MBLU scheme suffers from ping-pong LU effect. The ping-pong LU effect arises when the UE that moves repetitively between two adjacent cells performs LUs in the same way as in the case of straight movement. To tackle the ping-pong LU effect encountered by the original MBLU (OMBLU) scheme, an improved MBLU (IMBLU) scheme was proposed in the literature. Under the IMBLU scheme, the UE performs an LU when the number of different cells, rather than the number of cells, visited by the UE reaches the movement threshold. In this paper we develop an embedded Markov chain model to calculate the signaling cost of the IMBLU scheme. We derive analytical formulas for the signaling cost, whose accuracy is tested through simulation. It is observed from a numerical study based on these formulas that 1) the signaling cost is a downward convex function of the movement threshold, implying the existence of an optimal movement threshold that can minimize the signaling cost, and that 2) the reduction in the signaling cost achieved by the IMBLU scheme relative to the OMBLU scheme is more prominent in the case of stronger repetitiveness in the UE movement. The model developed and the formulas derived in this paper can guide the implementation of the IMBLU scheme in wireless communication networks.