設計與實作具SCTP即時語音服務系統於Linux嵌入式平台

Design and Implementation of VoIP Service System with SCTP on the Linux Embedded Platform

陳冠宇(Kuan-Yu Chen)

指導教授 ： 王淑卿 ； 張林煌

朝陽科技大學/資訊學院/資訊管理系/碩士(2011年)

摘要

本研究的重點為設計與實作一個使用SCTP來傳送即時語音封包的網路電話(Voice over Internet Protocol, VoIP)並運作於Linux嵌入式系統，藉此可以利用SCTP的特性來達到在嵌入式系統內有效的降低即時語音封包的遺失率並保持良好通話品質。因此，主要研究工作著重於修改Linux Kernel SCTP(LK-SCTP)與修改VoIP應用程式，將VoIP應用程式中的RTP的功能以SCTP的功能加以取代，讓SCTP更加適合用來做即時語音封包的傳輸。

關鍵字

Linux嵌入式系統 ； 即時傳輸協定 ； 串流控制傳輸協定 ； 網路電話

並列摘要

Internet technology has brought a tremendous effect on people''s life. For example, by using VoIP, we can video-phone call someone who''s somewhere in the world with little fee. It virtually reduces the distance between people. In this thesis, a VoIP of transmitting real-time voice packets by Linux kernel SCTP(LK-SCTP) is designed and implemented in Linux embedded system. The RTP function of VoIP application is replaced by the modified field function of SCTP Data Chunk. Effectively reducing the header overhead in the embedded system is presented and good voice quality is demonstrated.

並列關鍵字

Linux Embedded System ； SCTP ； VoIP ； RTP

參考文獻

[1] J. Postel, “User Datagram Protocol”, RFC 768, IETF, August 1980.

[2] J. Postel, “Transmission Control Protocol”, RFC 793, IETF, September 1981.

[6] R. Steward and Qiaobing Xie, Stream Control Transmission Protocol (SCTP) A Reference Guide, Addison Wesley, Inc. , first edition, 2002.

[10] M. Nurul Islam, and A. Kara, “Throughput Analysis of SCTP over a Multi-homed Association”, Proceedings of the IEEE CIT, pp. 110-116, September 2006.

[12] H. H. Tsai, “Design and Implementation of VoIP System using SCTP Handoff Mechanism”, July 2008.