周承復臺灣大學：資訊工程學研究所蔡鈞傑Tsai, Chun-ChiehChun-ChiehTsai2007-11-262018-07-052007-11-262018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/53891在過去十年當中，使用者對於服務需求的多樣化推動了行動通訊網路的澎勃發展。第2 代和2.5 代行動通訊系統為使用者提供了方便的語音和資料服務。但由於系統通訊協定的限制，這些行動通訊系統只能提供低傳送速率的服務。第3 代行動通訊系統就是在使用者想透過行動通訊網路來存取高傳送速率的多媒體資料的情況下被開發出來。但3G 網路的推出並不是要取代現有的所有行動通訊網路。3G 系統在設計時是希望能夠整合現有的行動通訊網路，如2G、2.5G 系統。再加上使用者所採用的行動通訊裝置的通訊能力有所差異，例如，單頻手機和雙瀕手機。因此，未來的行動通訊網路將會是處於異質的環境中。 在異質的行動通訊網路環境中，一個必須要面對到的問題就是：如何有效整合在不同系統的基地台上的系統資源（頻寬）。在本篇論文當中，我們提出了一個以資源分割概念為基礎的動態資源管理機制。我們將系統使用者分為三類，根據此分類將系統資源分割成三部份，每部份保留給一個類別使用。當使用者向基地台要求服務，基地台會找出該使用者所屬的服務類別，並檢查在行動通訊系統中保留給此類別的剩餘資源是否能滿足此使用者的需求。此外，因為網路流量會隨者時間不斷的變動，因此我們將動態調整保留給各類別的資源數目。此動態調整機制將會利用各類別的網路流量統計資料，包括使用者的抵達速率，服務時間和離開速率。 我們透過系統模擬的方式來評估本文所提出方法之效能。除了本文提出的方法外，我們另外比較了其他三中資源管理機制。實驗結果顯示我們的機制可以得到很好的效能改進。The growth in cellular network is exploding, not only in demand, but also in newtechnologies, applications and services. Multiple generations of mobile system will coexist. In such environments, not only mobile systems but also user equipments will be heterogeneous. The main challenge in these heterogeneous cellular networks is Resource Management. To improve the system performance, we propose a novel resource management scheme that utilizes the information of call arrival pattern and penalty value in different traffic class, where the penalty is define as the revenue that service provider will lose due to a blocked or dropped call request. In our resource management scheme, the total resource is divided among various classes of traffic. Resource management process is based on the traffic class of new call request and the number of call connection of each class already being serviced in the base station. A new call connection will be blocked if no sufficient resource is available to service this request. A similar algorithm is used to service handoff requests. In order to meet the variable traffic condition, our scheme will dynamically adjust the amount of resource that is reserved for each traffic class according to the information of call arrival pattern and penalty value in different traffic class. This new scheme is aimed at improving performance with regard to new call blocking rate and handoff dropping rate and maximizing the revenue for the service providers. We evaluate the performance of the scheme via simulations. Results agree with the intuition that a resource management scheme which considers the call arrival information is able to achieve better system performance.致謝 ................................................... 2 ABSTRACT................................................ 4 中文摘要................................................ 6 TABLE OF CONTENTS ...................................... 8 LIST OF TABLES.......................................... 10 LIST OF FIGURES......................................... 12 CHAPTER 1 INTRODUCTION.................................. 14 1.1 MOTIVATION.......................................... 14 1.2 PROBLEM DESCRIPTION ................................ 15 1.3 BACKGROUND REVIEW................................... 16 1.3.1 Development of Mobile System...................... 16 1.3.2 Architecture of Third-Generation Mobile System.... 17 1.4 THESIS ORGANIZATION................................. 19 CHAPTER 2 RELATED WORK.................................. 20 2.1 RESOURCE MANAGEMENT IN HOMOGENEOUS ENVIRONMENT...... 20 2.1.1 Threshold-Based Scheme............................ 20 2.1.2 Resource Sharing (RS) Based Scheme................ 21 2.1.3 Resource Reservation (RR) Based Scheme............ 22 2.2 RESOURCE MANAGEMENT IN HETEROGENEOUS ENVIRONMENT.... 23 CHAPTER 3 TRAFFIC-AWARE RESOURCE MANAGEMENT SCHEME...... 26 3.1 SYSTEM ARCHITECTURE ................................ 26 3.2 RESOURCE PARTITION BASED SCHEME..................... 28 3.2.1 Admission Control Policy ......................... 28 3.2.2 Proportional Adjustment........................... 31 CHAPTER 4 PERFORMANCE EVALUATION........................ 34 4.1 ROAD LAYOUT DATABASE ............................... 34 4.2 SIMULATION MODEL.................................... 35 4.2.1 Simulation Environment ........................... 36 4.2.2 Traffic Model .................................... 36 4.3 OTHER SCHEMES SIMULATED FOR COMPARISON.............. 36 4.4 PERFORMANCE METRICS ................................ 37 4.5 SIMULATION RESULT .................................. 38 CHAPTER 5 CONCLUSION ................................... 44 5.1 CONCLUSION.......................................... 44 BIBLIOGRAPHY............................................ 46336520 bytesapplication/pdfen-US異質行動通訊網路資源管理Heterogeneous Wireless Cellular Networkresource managementthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/53891/1/ntu-93-R91922106-1.pdf