1. 國立中正大學資工系, April 27, 2000, 講題：Connection-wise end-to-end delay analysis in ATM networks.

2. 國立台灣大學資訊系, March 2, 2001, 講題：Connection-wise end-to-end performance analysis.

3. IEEE WCNC 2003, New Orleans, LA, USA, March 20, 2003, 講題：Channel allocation and performance study for the integrated GSM/GPRS system.

4. 國立中央警察大學資管系, April 17, 2003, 講題：Radio channel allocation for the integrated GSM/GPRS system.

5. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA, July 23, 2003, Topic: Channel allocation and performance study for the GPRS system.

6. IEEE ICC 2004, Paris, France, June 23, 2004, 講題：Study on power saving for cellular digital packet data over a random error/loss channel.

7. IEEE PIMRC 2004, Barcelona, Spain, September 6, 2004, 講題：Study on window-based reliable multicast protocols for wireless LANs.

8. 國立台北大學通訊工程研究所,  October 6, 2004, 講題：Voice over IP (VoIP) and the session initiation protocol (SIP).

9. 國立台北大學 資訊管理研究所,  October 14, 2004, 講題：Voice over IP (VoIP) and the session initiation protocol (SIP).

10. 國立清華大學電機系, October 22, 2004, 講題：Channel allocation for the GPRS - Design and performance study.

11. 國立交通大學電信系, December 8, 2004, 講題：Channel allocation for the GPRS - Design and performance study.

12. 第十一屆行動計算研討會, 長庚大學, March 31, 2005, 講題：Study and implementation of SIP servers.

13. 國立臺灣師範大學資教系, April 25, 2005, 講題：Internet telephony: Issues and implementation.

14. IEEE VTC 2005-Spring, Stockholm, Sweden, May 30, 2005, 講題：A multicast routing algorithm using movement prediction for mobile ad hoc networks.

15. 2005年秋季先進網路電信技術論壇,台北市電腦公會, October 19, 2005, 講題：IP移動網路技術.

16. 國立臺灣師範大學應用電子科技研究所, December 14, 2005, 講題：Internet telephony.

17. 國立台灣大學資訊系, March 3, 2006, 講題：Channel allocation for the GPRS - Design and analysis.