(A)Directivity Preferable Paging Scheme based on a Direction-based Location Update

다국어 초록 (Multilingual Abstract)

Abstract
Location Update (LU) and Paging are two key factors of mobility management (MM) in wireless cellular networks. Because these two factors are contradictory to each other in their functional characteristics, there can be no optimal solution that satisfies these two functions simultaneously. Until now, there have been a lot of proposals to find out a compromise between these two. A Direction-Based Location Update Scheme (DBLU) and an Enhanced Direction-based Location Update Scheme (EDBLU) were among them. In these proposals, a mobile terminal (MT) user's moving direction is the key factor deciding the frequency of LU and the areal width of paging. Here, however, a shortest-distance-first (SDF) paging scheme is used, in which an MT's mobility pattern is not considered.
In this paper, a Directivity Preferable Paging Scheme (DPPS) is proposed that can reduce paging cost by adapting the directivity of MTs. Numerical results show that the DPPS can achieve better performance than the EDBLU when the MT user shows a clear directional mobility pattern.

목차 (Table of Contents)

• Contents
• 1. Introduction 1
• 2. Related Works 4
• 3. A Directivity Preferable Paging Scheme 10
• - 3.1 A directivity standard 12
• - 3.2 An algorithm to measure the performance of the
• DPPS based on the directivity standard 15
• 4. Evaluation and numerical results 20
• - 4.1 Preconditions 20
• - 4.2 Simulation Process 20
• - 4.3 Numerical Results 21
• 5. Conclusion and Future Works 27
• - 5.1 Conclusion 27
• - 5.2 Future Works 27
• 6. References 29