LTE長期演進技術之移動管理研究

Abstract

在長期演進技術（Long Term Evolution)的標準中，細胞（Cells，基地台的無線電 訊號覆蓋範圍）被分類成不同的追蹤區域（Tracking Areas)，這些追蹤區域再被進一步 被分類成追蹤區域清單（Tracking Area Lists)。當使用者設備（User Equipment)離開目 前的追蹤區域清單時，它向網路端回報自己的新位置。當網路端嘗試對使用者設備建立 連線時，網路端會要求追蹤區域清早中的細胞去呼叫（page)使用者設備。在本計劃， 我們將會分析長期演進技術的移動管理（Mobility Management)效能，並且比較長期演 進技術移動管理效能與以移動次數為基礎（Movement-based)和以移動距離為基礎 (Distance-based)的移動管理效能。我們也提出一個在長期演進技術的呼叫方法。與第 三代行動通訊網路（Third Generation)的呼叫方式相比，我們所提出的方法預期可以大 幅減少20〜90%的呼叫傳輸量。

In Long Term Evolution (LTE), the cells (the radio coverages of base stations) are grouped into the Tracking Areas (TAs), and the TAs are further grouped into the TA List (TAL). When a User Equipment (UE) moves out of the current TAL, it reports its new location to the network. If the network attempts to connect to the UE, the network asks the cells in the TAL to page the UE. In this project, we will investigate the performance of the LTE mobility management scheme, and compares this scheme with the previously proposed mobility management schemes: the movement-based and the distance-based schemes. We will also propose a new paging scheme for LTE mobility management. We anticipate that our scheme can reduce 20%-90% of the paging traffic as compared with the third-generation (3G) paging scheme.