System unfairness of DQDB in supporting multiple communities of interest

The DQDB (distributed queue dual bus) architecture has been adopted as the IEEE 802.6 Metropolitan Area Network standard. It is shown that the standard in its present form is still inadequate in dividing its available bandwidth between stations while supporting multiple communities of interest. In fact, the bandwidth balancing mechanism (BWB) introduced to overcome the unfairness of DQDB may actually worsen the fairness of the protocol. A modified version of the BWB mechanism called variable bandwidth balancing (V-BWB) which overcomes the inadequacies of DQDB during periods of heavy utilization is introduced.<<ETX>>

[1]  Graham Campbell,et al.  DQDB-an access delay analysis , 1990, Proceedings. IEEE INFOCOM '90: Ninth Annual Joint Conference of the IEEE Computer and Communications Societies@m_The Multiple Facets of Integration.

[2]  Chatschik Bisdikian.  Waiting Time Analysis in a Single Buffer DQDB (802.6) Network , 1990, IEEE J. Sel. Areas Commun..

[3]  Nicholas F. Maxemchuk,et al.  Improving the fairness of distributed-queue-dual-bus networks , 1990, Proceedings. IEEE INFOCOM '90: Ninth Annual Joint Conference of the IEEE Computer and Communications Societies@m_The Multiple Facets of Integration.

[4]  Marco Conti,et al.  A Methodological Approach to an Extensive Analysis of DQDB Performance and Fairness , 1991, IEEE J. Sel. Areas Commun..

[5]  Stanley T. Rolfe,et al.  A Comparison of the J -lntegral and CTOD Parameters for Short Crack Specimen Testing , 1991 .

[6]  Robert M. Newman,et al.  Distributed Queueing: A Fast and Efficient Packet Access Protocol for QPSX , 1986, ICCC.

[7]  D. Grillo,et al.  Flow Control in Local-Area Networks of Interconnected Token Rings , 1985 .

[8]  P. Zafiropulo,et al.  Fairness, priority and predictability of the DQDB MAC protocol under heavy load , 1990, International Zurich Seminar on Digital Communications, Electronic Circuits and Systems for Communications..