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

fYear

1990

fDate

30 Sep-2 Oct 1990

Firstpage

66

Lastpage

74

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Distributed Computing Systems, 1990. Proceedings., Second IEEE Workshop on Future Trends of

Conference_Location

Cairo

Print_ISBN

0-8186-2088-9

Type

conf

DOI

10.1109/FTDCS.1990.138297

Filename

138297