VD/VS Coupling Scheme Using Feed-Forward Congestion Indication for ABR Services in Wireless ATM (Special Issue on the Latest Development of Telecommunication Research)

概要

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This paper explores virtual destination (VD) / virtual source (VS) -based available bit rate (ABR) flow control performance, targeting wireless asynchronous transfer mode (WATM) application that can incur long link-delays because of employing radio-medium sharing and/or radio-specific data link control schemes. As this paper reveals, the conventional VD/VS scheme has difficulty in sustaining satisfactory ABR performance, when it is applied to long-delay-causing WATM ; suffers from significant increase in the necessary buffer capacity. To ensure the ABR performance in WATM., this paper proposes a new VD/VS coupling scheme using a feed-foward congetion indication. The proposed schem contrls the allowed cell rate of a source end system in a feed-forward manner by predicting the queue length at the time the WATM-associated-round-trip ahead. Simulation results show that the proposed schem exhibits excellent ABR performance with a long delay of the divided loop on the radio-link side. It is also verified that the proposed scheme is rather robust against uncertainty and/or time-variation regarding the predetermined radio link delay.
社団法人電子情報通信学会の論文
1998-12-25