Ki Young Kim , Mi Youn Yoon , Young Tae Shin

The KIPS Transactions:PartC, Vol. 10, No. 3, pp. 345-354, Jun. 2003
10.3745/KIPSTC.2003.10.3.345,   PDF Download:

Abstract

IP Multicast is required of more little network resources than one in unicast. Furthermore, reliable multicast has been researched for supporting reliability at IP Multicast mechanism. Although these studies are carried out, they only have focused on general data. In other words, in case that real-time packet, they can not support reliability since they do not consider real-time properties such as dependency of inter-frame and playback in time. Besides, we also request to support scalability because we are based on Mobile IP network together with internet. Thus, we need a mechanism to guarantee reliability and scalability of real-time stream data. In this paper, we propose PER (Preceding Error Recovery) that reflect characteristics of the real-time data, especially for H.323. PER provides scalable reliability because it is based on tree-based multicast basically and helps to support scalable relibility as reducing control packet and recovers stream buffer space from underflow status as soon as possible. PER shows much better scalable and reliable than existing works.

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