動態呼叫機制用於長期演進技術的行動管理

Abstract

在長期演進技術 (Long Term Evolution; LTE)中，服務區域被切成數個追蹤區 (Tracking Area; TA)，其中包含一個或多個基站的無線覆蓋範圍；這些追蹤區又組成追蹤區列表 (Tracking Area List;TAL)。當一通電話打進來時，網路嘗試呼叫追蹤區列表中的基站來連接手機，而這可能產生龐大的呼叫流量，並顯著地消耗有限的無線資源。為了解決這個問題，本論文提出了一種動態呼叫機制 (Dynamic Paging Scheme)，本機制根據手機移動和呼叫的行為即時決定呼叫基站的順序。我們比較動態呼叫機制和之前提出的CTT (Cell-TA-TAL)呼叫機制兩者的表現，並指出無論手機移動模式固定或頻繁時，動態呼叫機制表現皆較CTT呼叫機制優異。

In Long Term Evolution (LTE), the service area is partitioned into several Tracking Areas (TAs), which comprise one or more cells (the radio coverages of base stations). The TAs are grouped into TA List (TAL).When an incoming call arrives, the network attempts to connect to the User Equipment (UE) by paging the cells in the UE's TAL, which may incur large paging traffic that significantly consumes the limited radio resources.To resolve this issue, this thesis proposes a dynamic paging scheme that determines the paging sequence of cells in real time according to the UE movement and call behavior.We compare the performance of the dynamic paging with that of the previously proposed Cell-TA-TAL (CTT) paging.Our study indicates that the dynamic paging outperforms the CTT paging when movement pattern is regular and the UE moves frequently.