在現今的通訊系統中，有許多學術論文進行研究與討論有關如何達到用戶服務品質（Quality of Services, QoS）的要求。本篇論文中將使用IEEE 802.16-2004的QoS-based標準的各類service flow，並搭配不同的調變方式與結合中央大學通訊所的802.16-2004 （TDD架構）Base Station (BS)及 Subscriber Station（SS）設備，實際量測TCP和UDP的Goodput，其中Goodput也就是Throughput但不包括標頭部分，只有Throughput的payload部分，這樣來說，對於QoS工程它是更恰當的量測方式，還有分別就UGS、rtPS與nrtPS三種Service flow 做實際的量測；UGS使用VoIP訊務量測在IEEE 802.16-2004設備上的數據，rtPS用UDP的stream訊務做量測，nrtPS則用Ping的指令測試RTT與利用固定檔案大小量測response time，而response time可以模擬出一般網路環境應用程式，透過這些實驗測試數據可以作為日後參考，用以提供改善802.16-2004的網路服務品質的效能。

With respect to current communication systems, there are many literatures involving the discussion of how to address users’ growing demands for Quality of Services (QoS). In this dissertation, various service flows defined by the QoS-based criteria of IEEE 802.16-2004, in corporation with different modulation approaches, as well as in combination of the 802.16-2004 (TDD mode) base station (BS) and subscriber station (SS) systems installed in Graduate School of Communication Engineering, National Central University, are used to measure the TCP/UDP goodput which is, namely, the throughput including the payload but excluding the cell header. From the perspective, it is an ideal measurement for QoS engineering. The practical measurement also involves three service flows: UGS, rtPS and nrtPS. UGS utilizes VoIP traffic to measure the data on IEEE 802.16-2004 equipment. The rtPS utilizes UDP’s stream traffic for measurement purposes. The nrtPS utilizes Ping’s commands to test RTT and uses a given file size to measure response time, with which we can simulate application in a regular network application. These experimental test data will be regarded as a future reference for improving 802.16-2004 QoS performance.

[1] IEEE. 802.16-2004: Air Interface for Fixed Broadband Wireless Access Systems. Standard, 2004. IEEE standard for local and metropolitan area networks.
[2] IEEE. 802.16e-2005: Air Interface for Fixed and Mobile Broadband Wireless Access Systems – Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands. Standard, 28 February 2006. IEEE standard for local and metropolitan area networks.
[3] Zheng Wang, Internet QoS：Architectures and Mechanisms for Quality of Service, 2001. Morgan Kaufmann Publishers.
[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. 802.16g: Air Interface for Fixed Broadband Wireless Access Systems – Management Plane Procedures and Services, IEEE, 2006. Draft IEEE standard for local and metropolitan area networks.
[6] Hassan Yaghoobi, “Scalable OFDMA Physical Layer in IEEE 802.16 WirelessMAN,” vol. 8, no. 3, pp. 201-212, August 20, 2004.
[7] R. Housley, W. Ford, W. Polk, D. Solo, “Internet X.509 Public Key Infrastructure Certificate and CRL Profile,” RFC 2459, January 1999.
[8] R. Droms, “Dynamic Host Configuration Protocol,”
RFC 2131, March 1997.
[9] G. Malkin and A. Harkin,“TFTP Timeout Interval and Transfer Size Options,”, RFC 2349, May 1998.
[10] Qcheck,http://www.ixiacom.com/
[11] IxChartio, http://www.ixiacom.com/
[12] H. Schulzrinne, S. Casner, “RTP Profile for Audio and Video Conferences with Minimal Control”, RFC 3551, July 2003.
[13] ITU-T Recommendation P.862 Perceptual Estimation of
Speech Quality (PESQ)
[14] ITU-T P.800 Methods for Subjective Determination of Voice Quality specification
[15] H. Schulzrinne, S. Casner , R. Frederick and V. Jacobson, “RTP: A Transport Protocol for Real-Time Applications”,
RFC 1889, January 1996.