This paper presents an adaptive token release mechanism that can be used in both basic token ring protocols (e.g., IEEE 802.5) and timed token protocols (e.g., FDDI). The essence of the mechanism is to allow stations to share current state information that enables the token-holding station to decide whether to release the token or to keep it for another token-holding period. Simulation results show that using the adaptive token release mechanism, token ring protocols are able to support a large spectrum of real-time applications without sacrificing efficiency.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.