An access protection solution for heavy load unfairness in DQDB
IEEE INFOCOM '92 Proceedings of the eleventh annual joint conference of the IEEE computer and communications societies on One world through communications (Vol. 1)
Effect of bandwidth balancing mechanism on fairness and performance of DQDB MANS
IEEE INFOCOM '92 Proceedings of the eleventh annual joint conference of the IEEE computer and communications societies on One world through communications (Vol. 3)
A performance analysis of the IEEE 802.6 (DQDB) subnetwork with the bandwidth balancing mechanism
Computer Networks and ISDN Systems
A journey through the DQDB network literature
Performance Evaluation - Special issue on performance modeling of high speed telecommunication systems
A methodological approach to an extensive analysis of DQDB performance and fairness
IEEE Journal on Selected Areas in Communications
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The main advantages of Distributed Queue Dual Bus (DQDB) are the simplicity of its medium access control and that it can utilize all of the channel bandwidth independent of data transmission rate and network size. The data transmission rate of DQDB is in the range from DS3 to SONET speeds. Due to the increased ratio of propagation delay to segment transmission time, the information that a station receives about the current state of DQDB network can be out of date in such a high speed environment. This results in the position dependent characteristics of the network, which is the main reason that unfair throughput and access delay appears, especially when network is overloaded to cause unpredictable behavior. Though Bandwidth Balancing Machine (BWBM) is enabled in the IEEE 802.6 DQDB, and the fairness of throughput may be reached, the unfairness of access delay still exists, especially under overloaded condition. In this paper, we propose an efficient modification of REQ Queue Machine (RQM) with an access protection protocol. The modified RQM scheme eliminates longer access delay for downstream stations along the direction of transmission. The utilization of a modified protection scheme prevents the stubborn unfairness for the upstream stations close to the slot generator. Simulations show that our proposed method can reach fairness in terms of throughput and access delay.