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AN EFFICIENT MEDIUM ACCESS SCHEME TO SUPPORT VBR TRAFFIC ON A SLOTTED RING
Author(s) -
GOODALL DAVID
Publication year - 1996
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/(sici)1099-1131(199605)9:3<151::aid-dac306>3.0.co;2-w
Subject(s) - computer science , header , variable bitrate , asynchronous communication , computer network , asynchronous transfer mode , scheme (mathematics) , quality of service , mathematical analysis , mathematics
This paper describes a proposed efficient integrated medium access control scheme for a high‐speed unidirectional slotted ring which employs destination release. The mechanism uses separate cycles of access for synchronous and asynchronous traffic and is suitable for variable bit rate (VBR) traffic. The paper includes a comparison with the Orwell protocol under various simulated traffic loads. The use of separate cycles of access was found to be more efficient than the sharing of a single access cycle, at the cost of two bits in the cell header for each cycle, an insertion buffer for each cycle apart from the highest priority cycle, and associated node complexity. The proposed mechanism was able to meet delay requirements for synchronous traffic while maintaining high levels of overall utilization, thus making it suitable for use in a ring‐based asynchronous transfer mode (ATM)‐compatible local area network (LAN).