Title :
DQDB/FBS: A fair MAC protocol stemming from DQDB fairness analysis
Author :
Conti, M. ; Gregori, E. ; Lenzini, L.
Author_Institution :
CNR-Instituto CNUCE, Pisa, Italy
fDate :
30 Sep-2 Oct 1990
Abstract :
DQDB (distributed queue dual bus) is a media access control (MAC) protocol which is being standardized in IEEE 802 as an 802.6 metropolitan area network (MAN) standard proposal. The authors analyze the major features responsible for unfairness in the DQDB MAC protocol with the bandwidth balancing mechanism disabled. For each of these factors mechanisms to reduce the unfairness are identified and analyzed. These new mechanisms are brought together in a unique MAC protocol named DQDB/FBS (fair bandwidth sharing) which, while preserving the DQDB distributed queue concept, implements a new reservation mechanism. The performance analysis of DQDB/FBS shows a remarkable improvement in fairness. In particular, ideal fair behavior is obtained under heavy loads. A comparison between DQDB (BWB_MOD=8) and DQDB/FBS is provided, and the pros and cons of both MAC protocols are highlighted
Keywords :
computer networks; distributed processing; protocols; standards; 802.6 metropolitan area network; DQDB/FBS; IEEE 802; bandwidth balancing; distributed queue dual bus; fair MAC protocol; fairness analysis; media access control; reservation mechanism; unfairness; Bandwidth; Computer network management; Delay; Interference; Media Access Protocol; Performance analysis; Proposals; Resource management; Steady-state; Throughput;
Conference_Titel :
Distributed Computing Systems, 1990. Proceedings., Second IEEE Workshop on Future Trends of
Conference_Location :
Cairo
Print_ISBN :
0-8186-2088-9
DOI :
10.1109/FTDCS.1990.138297
