Dynamic Periodic Location Area Update：A New Mechanism for Fast Mobility Database Fault Recovery in 3G Mobile Network
徐德皓、黃培壝
E-mail: 9601184@mail.dyu.edu.tw
ABSTRACT
In the 3G mobile networks, the mobile database may suffer from data crashed, and then start a recovery procedure. The 3GPP technique specifications have proposed approaches for the recovery procedure. The recovery procedure proposed by 3GPP may result in the failure of call termination, because the mobile system cannot get the location information of user equipment before the completely recovering from mobile management database VLR (Visited Location Register) crash. In this paper we propose a novel approach based on Dynamic Period Location Area Update (D-PLAU) to shorten the delay of mobile database recovery procedure.
Besides, our method also reduces the cost of recovery procedure and consequently increases level of service quality. The simulating results shows that delay of recovering the record of mobile equipments are reduced, but the traffic of message transmitting is slightly raised.
Keywords : Personal Communication Service Networks, Periodic Location Area Update, VLR, Mobility Database Failure Recovery Table of Contents
封面內頁 簽名頁 授權書...iii 中文摘要...iv 英文摘
要...v 誌謝...vi 目錄...vii 圖目 錄...ix 表目錄...xi 第一章 緒論...1 1.1 簡 介...1 1.2 研究動機...2 1.3 研究方向...3 1.4 各章提 要...3 第二章 背景...4 2.1 行動資料庫...4 2.2 當機回 復...6 第三章 動態式PLAU 回復方法...21 3.1 研究動機與目標...21 3.2 本篇論文的作法...21 第四章 模擬與評估...25 4.1 模擬環境與參
數...25 4.2 與3GPP 方法（固定式）的模擬結果與分析...30 4.3 與3GPP（當機後縮減）方法的模擬結 果與分析...38 第五章 結論...48 參考文獻...49
REFERENCES
[1]. TIA/EIA/IS-41.”Cellular radio telecommunications intersystem operation.”Decemher. 1997 [2]. S:Mohan and R.Jain.,“two user location strategies for personal commutucatiohs services”, IEEE Personal Communications, Vol. 1, First Quarter 1994, pp.42-50.
[3]. Y.-J. Cho, Y.-B. Lin, and C.-H. Rao, “Reducing the Network Cost of Call Delivery to GSM Roamers”, IEEE Network, vol. 11, no 5, Sept./Oct. 1997,pp. 19–25.
[4]. ETSI/TC Rec. GSM 03.07,“Restoration Procedures, Version 4.2.0,”1993.
[5]. ETSI/TC Rec. GSM 23.007,“Restoration Procedures, Version 5.1.0,”2006.
[6]. ETSI/TC Rec. GSM 23.012,“Location management procedures, Version 6.3.0,” 2005.
[7]. ETSI/TC Rec. GSM 23.060,“Service description, Version 6.14.0,” 2006.
[8]. ETSI/TC Rec. GSM 24.008,“Mobile radio interface Layer 3 specification; Core network protocols, Version 6.9.0,” 2005.
[9]. ETSI/TC Rec. GSM 04.08,“Mobile radio interface Layer 3 specification, Version 7.21.0,” 2003.
[10]. ETSI/TC Rec. GSM 03.22,“Functions related to Mobile Station (MS) in idle mode, Version 4.8.1,” 1995.
[11]. ETSI/TC Rec. GSM 23.122,“Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode, Version7.6.0,”2006.
[12]. ETSI/TC Rec. GSM 09.02,“Mobile Application Part (MAP) Specification,Version 7.15.0,”2004.
[13]. ETSI/TC Rec. GSM 29.002, “Mobile Application Part (MAP) specification, Version 3.15.0,” 2002.
