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A Kernel-level RTP for Efficient Support of Multimedia Service on Embedded Systems  

Sun Dong Guk (중앙대학교 컴퓨터공학과)
Kim Tae Woong (텔리언 연구원)
Kim Sung Jo (중앙대학교 컴퓨터공학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.10, no.6, 2004 , pp. 460-471 More about this Journal
Abstract
Since the RTP is suitable for real-time data transmission in multimedia services like VoD, AoD, and VoIP, it has been adopted as a real-time transport protocol by RTSP, H.323, and SIP. Even though the RTP protocol stack for embedded systems has been in great need for efficient support of multimedia services, such a stack has not been developed yet. In this paper, we explain embeddedRTP which supports the RTP protocol stack at the kernel level so that it is suitable for embedded systems. Since embeddedRTP is designed to reside in the UBP module, existing applications which rely ell TCP/IP services can proceed the same as before, while applications which rely on the RTP protocol stack can request HTP services through embeddedRTp API. EmbeddedRTP stores transmitted RTP packets into per session packet buffer, using the packet's port number and multimedia session information. Communications between applications and embeddedRTP is performed through system calls and signal mechanisms. Additionally, embeddedRTP API makes it possible to develop applications more conveniently. Our performance test shows that packet-processing speed of embeddedRTP is about 7.5 times faster than that oi VCL RTP for multimedia streaming services on PDA in spite that its object code size is reduced about by 58% with respect to UCL RTP's.
Keywords
Embedded System; Real-time Service; Multimedia service; RTP;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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