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Journal of Information Science and Engineering, Vol.19 No.5, pp.787-808 (September 2003)


Efficient Location Traffic Management With Multiple Virtual Layers*

Daewoo Chung, Hyunseung Choo, Hee Yong Youn
and Seong-Moo Yoo+
School of Information and Communication Engineering
Sungkyunkwan University
Suwon 440-746, Korea
E-mail: {chung, choo, youn}@ece.skku.ac.kr
+Electrical and Computer Engineering Department
The University of Alabama in Huntsville
Huntsville, AL 35899, U.S.A.

In mobile wireless networks, efficient location management for tracking and finding the mobile users is a critical issue. The traffic for location update can be excessive, especially at base stations that are near location area (LA) boundaries. In this paper we propose a new location update scheme which can significantly reduce the signaling traffic for location update. It is based on the virtual layer approach employing SubMSCs. Here the virtual layer is laid upon the original layer of LAs such that the mobile terminals moving around the boundary cells of adjacent LAs begin moving within a virtual LA. As a result, the proposed scheme significantly reduces the location update traffic compared to an overlapping scheme which is the most recent and efficient location update scheme.

Keywords: location area, mobile terminals, signaling traffic, wireless network, SS7

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Received September 22, 2001; revised April 10 & October 11, 2002; accepted December 18, 2002.
Communicated by Yi-Bing Lin.
*Short version of this work was published in International Conference on Parallel Processing 2001, Valencia, Spain. This work was supported in part by Brain Korea 21.