臺灣博碩士論文加值系統

General Packet Radio Service (GPRS) 提供行動用戶交換式封包的服務。然而現存的GPRS規格並無法提供推播(push)的機制，而且也很難支援撥打無線網路電話的功能。透過GSM簡訊服務，這篇論文提出了一個支援GPRS用戶網路電話的推播機制。這個機制不需要更改任何現有的GPRS架構。接著，我們擴充此一推播機制，將它應用在Wireless Local Area Network (WLAN)。我們也提出了支援無線網路電話(包括GPRS及WLAN)私有IP位址的方法。

General Packet Radio Service (GPRS) provides packet switched data service for mobile users. However, the existing GPRS specification does not provide the push mechanism, and it is difficult to support GPRS services such as call termination (incoming call) for wireless Voice over IP (VoIP). Based on short message services, this paper proposes a push mechanism for GPRS VoIP. Our approach does not need to modify the existing GPRS structure. Then we extend our solution for Wireless Local Area Network (WLAN) that provides high-speed data services in hot spots. We also introduce the approaches for wireless (including GPRS and WLAN) VoIP supporting private IP addresses.

中文摘要
ABSTRACT
Acknowledgement
CHAPTER 1 Introduction
1.1 GPRS
1.2 WLAN
1.3 iSMS
1.4 Motivation
1.4.1 Unavailability of Network-Requested PDP Context Activation
1.4.2. Resource Consumption on the MS
1.4.3 No SIP Supporting for Crossing Public and Private IP Networks
CHAPTER 2 The SIP-based Push Mechanism
2.1 SIP
2.2 L2TP
2.3 A SIP-based Push Mechanism for GPRS and WLAN
CHAPTER 3 SIP Application Level Gateway
3.1 Public and Private Address Translation
3.2 SIP Registration
3.3 Public-to-Private SIP Session Setup
CHAPTER 4 Conclusions
REFERENCES

[1] 3GPP TS 23.060: “GPRS Service Description; Stage 2”, October 2001.
[2] Rekhter, Y., Moskowitz, B., Karrenberg, D., de Groot,G. and E. Lear, "Address Allocation for Private Internets", BCP 5, RFC 1918, February 1996.
[3] Townsley, W., Valencia, A., Rubens, A., Pall, G., Zorn, G. and Palter, B., "Layer Two Tunneling Protocol (L2TP)", RFC 2661, August 1999.
[4] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M. and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, June 2002.
[5] Rao, C.H., Chang, D.-F., and Lin, Y.-B. “iSMS: An Integration Platform for Short Message Service and IP Networks”. IEEE Network, 15(2): 48-55, 2001.
[6] Srisuresh, P. and M. Holdrege, "IP Network Address Translator (NAT) Terminology and Considerations", RFC 2663, August 1999.
[7] Handley, M. and V. Jacobson, "SDP: Session Description Protocol", RFC 2327, April 1998.
[8] Schulzrinne, H., Casner, S., Frederick, R. and V. Jacobson, "RTP: A Transport Protocol for Real-Time Applications", RFC 1889, January 1996.
[9] Droms, R., "Dynamic Host Configuration Protocol", RFC 2131, Bucknell University, March 1997.
[10] H. Schulzrinne. RTP Profile for Audio and Video Conferences with Minimal Control. Audio-Video Transport Working Group, IETF RFC 1890. January 1996.