20 January 1993 Transmitting time-dependent multimedia data in FDDI networks
Author Affiliations +
Timely delivery of multimedia data is one of the key requirements in a distributed multimedia system. In a token ring network, this can be achieved by a proper control of channel access. FDDI uses a timed token MAC protocol to control the token rotation time. During network initialization, a protocol parameter called target token rotation time (TTRT) is determined. Its value indicates the expected token rotation time. Each node is assigned a fraction of the TTRT, known as synchronous bandwidth, for transmitting its synchronous messages which may be deadline constrained. In this paper, we study methods used for setting the protocol parameters such as TTRT and synchronous bandwidth. The goal is to satisfy the message deadlines. In particular, we discuss the use of the normalized proportional scheme for allocating the synchronous bandwidth. We derive a condition on the utilization factor for ensuring timely delivery of all synchronous messages, and show that 33% utilization is the tight lower bound, regardless of the number of nodes, message lengths, periods, etc. Based on this scheme, we address proper selection of TTRT and trade-off between buffer size and the capability of meeting message deadlines.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Cheng-Chew Lim, L. Yao, Wei Zhao, "Transmitting time-dependent multimedia data in FDDI networks", Proc. SPIE 1785, Enabling Technologies for High-Bandwidth Applications, (20 January 1993); doi: 10.1117/12.139255; https://doi.org/10.1117/12.139255


Naval fiber optic system development program
Proceedings of SPIE (December 01 1991)
A dynamic bandwidth allocation scheme for EPON
Proceedings of SPIE (November 19 2008)
A novel fairness algorithm for resilient packet rings
Proceedings of SPIE (December 05 2005)
CWRUnet case history of a campus wide fiber to...
Proceedings of SPIE (February 01 1991)
Passive-Star-Configured Fiber Optic LANs
Proceedings of SPIE (January 01 1987)
Active Star Configured Fiber Optic CSMA/CD LANs
Proceedings of SPIE (January 01 1987)

Back to Top