Abstract
An efficient location registration scheme is essential to continuously accommodate the increasing number of mobile subscribers and to offer a variety of multimedia services with good quality. The objective of this study was to analyze the optimal size for the location area of a distance-based registration (DBR) scheme by varying the number of location areas on a cell-by-cell basis, not on a ring-by-ring basis. Using our proposed cell-by-cell distance-based registration scheme with a random walk mobility model, a variety of circumstances were analyzed to obtain the optimal number of cells for location area for minimizing the total signaling cost on radio channels. Analysis results showed that the optimal number of cells for location area was between 4 and 7 in most cases. Our cell-by-cell distance-based location registration scheme had less signaling cost than an optimal ring-by-ring distance-based location registration scheme with an optimal distance threshold of 2 (the optimal number of cells for location area was 7). Therefore, when DBR is adopted, it must be implemented with an LA increasing on a cell-by-cell basis to achieve optimal performance.
Highlights
To cope with the continuous increase of mobile subscribers and provide various multimedia services with good quality, the efficiency of radio channels, which are limited resources, must be maximized
Studies on distance-based registration (DBR) [9,10,11,12,13,14,15], movement-based registration (MBR) [9,16,17,18,19], time-based registration [20], tracking area list (TAL)-based registration [4,21,22,23], and auxiliary location registrations such as power-on registration, power-off registration, and implicit location registration have been performed for next-generation networks [1,5]
Previous studies on DBR using random mobility models [9,11,15,16] have presented the optimal size of the location area (LA) assuming th LA is composed of rings of cells to compare the performance with zone-based registration (ZBR) [6] or MBR [
Summary
To cope with the continuous increase of mobile subscribers and provide various multimedia services with good quality, the efficiency of radio channels, which are limited resources, must be maximized. Previous studies on DBR using random mobility models [9,11,15,16] have presented the optimal size of the LA assuming th LA is composed of rings of cells to compare the performance with ZBR [6] or MBR [. This kind of ring-by-ring system environment assumed in p2 orfe2v2ious st [6,12,16,17] has significant problems for real-world systems since the number of cells prising the LA increases discretely and steeply.
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