簡易檢索 / 詳目顯示
| 研究生： |
楊豐銘 Yang-fen ming |
|---|---|
| 論文名稱： |
差異式服務網路中RED機制對串流影像品質改善之研究 A Study of Improving Video Flows on the Basis of Differentiated Service in RED Queue Mechanism |
| 指導教授： |
陳彥文
Chen-Yen Wen |
| 口試委員: | |
| 學位類別： |
碩士 Master |
| 系所名稱： |
資訊電機學院 - 通訊工程學系在職專班 Executive Master of Communication Engineering |
| 畢業學年度： | 99 |
| 語文別： | 中文 |
| 論文頁數： | 171 |
| 中文關鍵詞： | 隨機早期偵測 、差異式服務網路 |
| 外文關鍵詞： | RED Queue, Differentiated Service |
| 相關次數： | 點閱：5 下載：0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
隨著各種網路運用與傳送資料型態的多元與多樣性:網路電話(VOIP, voice over IP)、視訊電話(Video over IP)、視訊會議(Video conference)、社交網路服務(Social Network Service)等，網際網路傳送封包時，一般皆使用盡力服務(best-effort service)機制，將封包一視同仁傳輸於網路，由於影像封包彼此之間具有關聯性，因此將受到影響。
本研究提出在差異式服務網路模型中改善佇列管理機制使得接收端有更佳的效能與影像品質。此機制有兩個部份：第一，利用差異性服務欄位(DS Filed)中CU(Currently Unused)進行分類；第二，改善的RIO-C(RED with in/out and Coupled average Queues)機制對影像封包進行差異式佇列管理，在不同網路負載下，依據影像封包之間的關聯性，盡可能降低影像封包遭到隨機的丟棄，進而維持接收端的基本影像品質，有效的增加接收端接收影像封包的品質。最後並利用長時間影片傳輸、動靜態影片、改變Video server數量等實驗模擬方式進行驗證。
With the various applications of Internet and data transmission such as Voice over IP, Video over IP, Video Conference, and Social Network Service...etc, generally, the use of the Internet Best-Effort Service Mechanism, transmitting video packages to Internet as equal, have the relationship with video packages that made an impact on the Internet.
According to this study, improving the management of queue mechanism on the basis of the Differentiated Service makes receivers to have better efficiency and video quality. This mechanism has two parts. First, it applies Currently Unused of DS Filed to classify. Second, it applies the improving RED with in/out and Coupled Average Queues Mechanism to manage the video packages on the basis of the Differentiated Queues. According to the relationship of all video packages, try to reduce the video packages which were abandoned as random as possible via different loading from the Internet. Also, it continually maintains the quality of the basic videos from the receivers. Moreover, it increases the quality of the accepting video packages efficiently. At the end, it proved via various simulated experiments such as long-term video transmissions, animated/static videos, and changing the numbers of Video Servers etc.
[1] The Internet Engineering Task Force (IETF): http://www.ietf.org/
[2] RFC 2815: Integrated Service Mappings on IEEE 802 Networks
[3] RFC 2475: An Architecture for Differentiated Services
[4] Sally Floyd and Van Jacobson: Random Early Detection Gateways for Congestion Avoidance; August 1993 IEEE/ACM Transactions on Networking
[5] RFC 2205: Resource ReSerVation Protocol (RSVP)- Version 1 Functional Specification
[6] RFC 2211: Specification of the Controlled-Load Network Element Service
[7] RFC 2212: Specification of Guaranteed Quality of Service
[8] RFC 1633: Integrated Services in the Internet Architecture: an Overview
[9] RFC 1349: Type of Service in the Internet Protocol Suite
[10] RFC 2460: Internet Protocol, Version 6 (IPv6)
[11] RFC 2697: A Single Rate Three Color Marker
[12] RFC 2698: A Two Rate Three Color Marker
[13] RFC 2859: A Time Sliding Window Three Colour Marker (TSWTCM)
[14] David D. Clark, Fellow, IEEE, and Wenjia Fang; Explicit Allocation of Best-Effort Packet Delivery Service ; IEEE/ACM TRANSACTIONS ON NETWORKlNG, VOL. 6, NO. 4, AUGUST 1998
[15] INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.264 (03/2005) Advanced video coding for generic audiovisual services
[16] NS2: http://www.isi.edu/nsnam/ns/ns-build.html
[17] Evalvid: EvalVid - A Video Quality Evaluation Tool-set http://www.tkn.tu-berlin.de/research/evalvid/
[18]Cisco: Distributed Weighted Random Early Detection http://www.cisco.com/en/US/docs/ios/11_1/feature/guide/WRED.html
