The No Slot Wasting Bandwidth Balancing Mechanism for Dual Bus Architectures

A bandwidth balancing (BWB) mechanism has been added to the distributed queueing algorithm of the distributed-queue dual bus (DQDB) network. BWB can provide the requested throughputs by lightly loaded stations and evenly distribute the remaining channel bandwidth among overloaded stations. However, its operation requires the wastage of channel slots. The authors introduce a new bandwidth balancing mechanism for DQDB. The operation of the new mechanism requires one additional bit in the access control field (ACF) of the slot but has the advantage of exhibiting a similar behavior with the current BWB mechanism of DQDB without wasting any channel slots. For this reason, it can converge faster to the steady state in which fair bandwidth allocation is achieved. The authors investigate the throughput and delay performance of the proposed mechanism under one traffic class and examine its capacity to support multiple priority classes of traffic. They also compare its performance with the corresponding performance of the BWB mechanism of DQDB. >

[1]  Kijun Han,et al.  Dynamic bandwidth balancing mechanism for improving DQDB performance , 1991, ICC 91 International Conference on Communications Conference Record.

[2]  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.

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

[4]  Chatschik Bisdikian,et al.  A mechanism for implementing preemptive priorities in DQDB subnetworks , 1991, ICC 91 International Conference on Communications Conference Record.

[5]  Nicholas F. Maxemchuk,et al.  Fair access of multi-priority traffic to distributed-queue dual-bus networks , 1991, IEEE INFCOM '91. The conference on Computer Communications. Tenth Annual Joint Comference of the IEEE Computer and Communications Societies Proceedings.

[6]  Marco Conti,et al.  DQDB under heavy load: performance evaluation and fairness analysis , 1990, Proceedings. IEEE INFOCOM '90: Ninth Annual Joint Conference of the IEEE Computer and Communications Societies@m_The Multiple Facets of Integration.

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

[8]  Chong-Ho Choi,et al.  Fairness improvement in DQ protocol with multiple priority classes , 1991, ICC 91 International Conference on Communications Conference Record.