下一代行動/無線網路上具行動感知的資源配置策略

A Mobility-Aware Resource Allocation Strategy for Next-Generation Mobile/Wireless Networks

余泰炘(Tai-Xin Yu)

指導教授 ： 黃毅然

元智大學/資訊學院/資訊工程學系/碩士(2007年)

摘要

結合網際網路協定(IP)和無線寬頻的技術(wideband radio technology)，下一代的行動/無線網路將提供行動多媒體網際網路服務給使用者，這樣的服務包括voice over IP (VoIP)和具有不同QoS跟頻寬要求的行動多媒體應用。無線網路的頻寬有著先天性的限制，一般來說比有線網路的頻寬來的少，在有限頻寬的限制下提供行動多媒體網際服務的時候，一個精密的資源配置策略是重要的。此外，我們注意到使用者的行動性(mobility)，對於行動/無線網路環境中的資源配置有重要的影響。每當正在進行通話中的行動用戶從一個服務區域移動至另一個服務區域時，必須配置其網路資源。假如資源不足以提供給這個連線需求，可能會造成QoS下降或者是連線強迫中斷。將使用者的行動性列入考量，因此本篇論文設計與發展出一個具行動感知的資源配置策略(MARA)，來達成高的頻寬利用度同時滿足在下一代行動/無線網路中，具有不同QoS要求的多媒體訊務。此外，本篇論文發展了一個系統事件導向的程式模擬來研究MARA的效能以及一個數學模型以推導出使用者滿意度指標，並以使用者滿意度指標為基礎，決定了最佳的頻寬配置。

關鍵字

網際網路 ； 資源配置 ； 行動性 ； 使用者滿意度

並列摘要

By combining Internet protocol (IP) and wideband radio technologies, next-generation mobile/wireless networks will provide mobile multimedia Internet services to users, including voice over IP (VoIP) and mobile multimedia applications with different quality-of-service (QoS) and bandwidth requirements. The bandwidth of the wireless links is inherently limited and is generally much smaller than that in the wireline counterpart. To provide mobile multimedia Internet services under the limited bandwidth constraint, a sophisticated resource allocation strategy is crucial. Besides, we note that user mobility has an important effect on resource allocation in mobile/wireless networks. Whenever a mobile host in an active session moves from one service area to another, network resources need to be allocated at the new service area. In case there are insufficient resources to accommodate the connection requests, QoS degradation or forced termination may occur. By taking user mobility into account, therefore, this thesis designs and develops a mobility-aware resource allocation (MARA) strategy to achieve high bandwidth utilization while satisfying the QoS requirements for multimedia traffic carried in next-generation mobile/wireless networks. In addition, this thesis develops an event-driven simulation to study the MARA performance and a model to derive the user satisfaction index. On the basis of the user satisfaction index, the optimal bandwidth allocation can then be determined.

並列關鍵字

Internet ； VoIP ； QoS ； resource allocation ； mobility ； user satisfaction

參考文獻

[1] RFC 3261, “SIP: Session Initiation Protocol,” June 2002.

[2] Teodora Guenkova-Luy, Andreas J. Kassler, and Davide Mandato, “End-to-End Quality-of-Service Coordination for Mobile Multimedia Applications,” IEEE Journal on Selected Areas in Communications, 22(5), pp. 889-903, June 2004.

[3] Kazutaka Murakami, Oliver Haase, JaeSheung Shin, and Thomas F. La Porta, “Mobility Management Alternatives for Migration to Mobile Internet Session-Based Services,” IEEE Journal on Selected Areas in Communications, 22(5), pp. 818-833, June 2004.

[4] Chris Metz, “Internet Multimedia: Answering Basic Questions,” IEEE Internet Computing, pp. 51-55, July-August 2005.

[5] Yang Xiao, “Performance Analysis of Priority Schemes for IEEE 802.11 and IEEE 802.11e Wireless LANs,” IEEE Transactions on Wireless Communications, 4(4), pp. 1506-1515, July 2005.