近年來Wi-Fi 無線網路的技術發展成熟，並有許多相關的部署應用。相對於Wi-Fi而言，WiMax是一種新穎的技術，WiMax比Wi-Fi具有更高頻寬容量、傳輸範圍更廣、傳輸速度更快等優點…。而在WiMax部署運用成熟前兩者將會共存運作。在無線網路中，頻寬是很珍貴的資源，因此為了提供使用者更多元及更佳的服務品質(QOS)，有效率的頻寬管理演算法是必需的。
在本文中將結合Wi-Fi與WiMax相關技術，提供一個能依照網路狀況動態調整頻寬資源的演算法。本文最大的貢獻在於我們所提出的方法能解決在無線網路中互相矛盾的爭議-頻寬的使用率、新連線的阻絕率、換手連線的中斷率。我們的方法相當靈活，能真實反映網路實際狀況，提供一個適當的資源使用平衡點，讓網路能達到最佳的效能。

Recently, Wi-Fi systems have been widely deployed for public mobile Internet services. Contrast to Wi-Fi,WiMax is a novel technology. WiMax have a lot of advantages than Wi-Fi, including high capacity、large communication range and high speed etc…. WiMax and Wi-Fi will coexist before WiMax construction and development are ripe . Bandwidth is an extremely valuable and scarce resource in a wireless network.Therefore,efficient bandwidth management is necessary in order to provide high quality service to users with different requirements in a multimedia wireless/mobile network. In this paper, we combine Wi-Fi and WiMax technolog, propose an dynamic bandwidth management algorithm that adjusts bandwidth capacity adaptively based on existing network conditions.
The most important contribution of our work is an adaptive
algorithm that is able to resolve conflicting performance criteria- bandwidth utilization, call dropping and call blocking
probabilities. Our algorithm is quite flexible, is responsive to
current traffic conditions in cellular networks, and tries to
strike the appropriate performance balance between contradictory requirements for QoS sensitive multimedia services.

[1]Sungwook Kim and Pramod K. Varshney, Fellow, IEEE
”An Integrated Adaptive Bandwidth-Management Framework for QoS-Sensitive Multimedia Cellular Networks”
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 53, NO. 3, MAY 2004 Page(s):835 – 846.
[2]WiMAX Forum,http://www.wimaxforum.org
[3]IEEE 802.16: Air Interface for Fixed Broadband Wireless Access Systems. Standard, 2002. IEEE standard for local and metropolitan area networks.
[4] IEEE 802.16a: Air Interface for Fixed Broadband Wireless Access Systems – Amendment 2: Medium Access Control Modifications and Additional Physical Layer Specifications for 2–11GHz. Standard, IEEE, 2003. IEEE standard for local and metropolitan area networks.
[5]IEEE Std 802.16e-2005 and IEEE Std 802.16-2004/Cor 1-2005 (Amendment and CorrigendE Std 802. um to IEE16-2004).
[6]Chris Kozup “WiMax technology hold promise,agree experts”22 March 2004.
[7]Sungwook Kim and Pramod K. Varshney
“An Adaptive Bandwidth Reservation Algorithm for QoS Sensitive Multimedia Cellular Networks”IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 52, NO. 3, MAY 2002 Page(s):1475 – 1479.
[8] Nidal Nasser and Hossam Hassanein
“Adaptive Bandwidth Framework for Provisioning Connection-level QoS for Next Generation Wireless Cellular Networks”,the Canadian Journal of Electrical and Computer Engineering,Special Issue on“Wireless Communications and Networking”, Vol.29,No. 1/2,Jan/Apr,Page(s):101-108.
[9]Wei Li; Hang Chen; Agrawal, D.P.;
“Performance Analysis of Handoff Schemes With Preemptive and Nonpreemptive Channel Borrowing in Integrated Wireless Cellular Networks“Wireless Communications, IEEE Transactions on Volume 4,Issue 3,May 2005 Page(s):1222 – 1233.
[10]Anjlica Malla, Mona El-Kadi, Stephan Olariu, and Petia Todorova“A Fair Resource Allocation Protocol for
Multimedia Wireless Networks”IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS,VOL.14,NO.1,JANUARY 2003
Page(s):63 – 71.
[11]Andrew S. Tanenbaum”Computer Networks 4th ed.”2003
[12] Pyramid”WiMAX and Wi-Fi: Unwiring the World”November 19, 2003
[13] Anjlica Malla, Mona El-Kadi, Stephan Olariu, and PetiaTodorova“A Fair Resource Allocation Protocol for Multimedia Wireless Networks” IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 14, NO. 1, JANUARY 2003
[14] Chr.Bettstetter, H.Hartenstein, and X.P´erez-Costa, “Stochastic Properties of the Random Waypoint Mobility Model,＂ACM Mobicom Workshop MSWIM,2002.