- 學位論文
HSDPA通訊協定模擬與實體網路測試
Simulation and Measurement of High Speed Downlink Packet Access Network
摘要
隨著網際網路世代日漸習慣了無處不在的寬頻存取，而不止限於家中或辦公室使用，行動寬頻正逐漸實現。預估在 2012 年之前達到的 18 億寬頻用戶當中，有 2/3 將成為行動寬頻的消費者，其中大多數人將享受由 HSPA（高速封包存取）網路提供的服務。人們已能使用具3G無線網路功能的筆記型電腦，瀏覽網際網路或傳送電子郵件，以數據機或 USB 收發器方式來取代固接 DSL 數據機，並利用 3G 手機來收發影片或音樂，有了3G網路技術，使用者的體驗勢必加倍精彩。然而HSPA技術將使需求門檻較高的3G應用更上一層樓，例如互動電視、行動影音部落格、高階電玩遊戲或專業服務等。 本篇論文主要透過實地量測與儀器溝通來針對使用者3G數據通訊設備，分析說明目前使用者設備，對於電信業者所提供最新的HSDPA網路效能，以及使用者設備中針對3GPP所規範的HSDPA實現。 我們在國內電信業者通訊網路量測與實際3GPP規範驗證後，有下列幾點發現： 1. 電信系統業者不斷的改善HSDPA 網路效能，與各家通訊製造商產品不斷的推陳出新，以提供客戶使用最佳的無線網路傳輸速率。 2. 原本3G (WCDMA)網路系統的下載速率為384K bps，可得知現今HSDPA 網路效能提升至7.2M bps規模相互比較之下，配合最新3.5G數據卡使用其效能確實優於WCDMA 網路效能。 3. 利用一般市售3.5G數據網卡以儀器模擬實驗所測得之 HSDPA 效能比實際網路模式下所測得之HSDPA 其效能差異甚大。主要因為使用者在使用實際網路下載數據資料時，會因無線環境變化及站台資源分配之下，影響實際下載速率，但總體上HSDPA還是優於3G (WCDMA)的使用。
關鍵字
HSDPA模擬並列摘要
Along with the coming of the internet generation, the broadband access becomes increasingly ubiquitous. It is no longer only limited to home or office use, mobile broadband has gradually come into use, too. It is estimated that by the year of 2012 broadband users will reach 1.8 billion, 2/3 of which will be the consumers of mobile broadband. Furthermore, most of them will enjoy the services provided by the HSPA (High Speed Packet Access) network. People nowadays are able to use notebooks equipped with the function of 3G wireless networks to browse the internet or send e-mails. This can be done by replacing the traditional fixed DSL modem with a modem or a USB transceiver. With the advancement of the 3G network technology, sending and receiving video or music through a 3G mobile phone provides the user with an even richer enjoyment. Moreover, the HSPA technology will push the higher demand 3G applications, such as interactive TV, mobile video Blog, high-end video games or professional services, to another new level. In this paper, the research was mainly conducted by the field measurement and communications between devices. It analyzes the 3G data communications equipment used by current users, as well as the performance of the latest HSDPA network provided by the telecom operators and the accomplishment of HSDPA through the 3GPP specifications. By comparing the measurement of communication network provided by domestic telecom operators with the actual validation of 3GPP specifications, the findings are shown as below: 1. Telecom system operators have continuously improved the performance of HSDPA network. They integrate it with the products produced by various communication manufacturers in order to provide customers with the best network transmission speed. 2. The original download speed for 3G (WCDMA) network system is 384K bps whereas the performance of today's latest HSDPA network can be up to 7.2M bps. In terms of the scale, HSDPA network performs far better than 3G (WCDMA). 3. The performance of HSDPA measured by the radio simulator test differed greatly from that measured under the actual network mode. The reason is that when users download data from the actual network, the variations caused by the wireless environment and the resources allocation of the platform influence the actual download speed. But overall, the HSDPA performs far better than the 3G (WCDMA).