Research: Adaptive bandwidth estimation and allocation for DQDB MAN interworking with B-ISDN

Authors:
Jung-Shyr Wu;Yau-Chung Wang
Affiliations:
Department of Electrical Engineering, National Central University, Chung-Li, Taiwan, ROC;Department of Electrical Engineering, National Central University, Chung-Li, Taiwan, ROC
Venue:
Computer Communications
Year:
1996

Citing 3
Cited 0

Bandwidth allocation mechanism for LAN/MAN interworking with an ATM network

Computer Communications - Special issue on MAN—lower communication levels—Part 2
A methodological approach to an extensive analysis of DQDB performance and fairness

IEEE Journal on Selected Areas in Communications
Internetting LAN's and MAN's to B-ISDN's for connectionless traffic support

IEEE Journal on Selected Areas in Communications

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Abstract

The main challenge for internetting LAN/MAN across B-ISDN comes from the fact that B-ISDN is connection-oriented but LANs and MANs run connectionless protocols. The critical issue is for the gateway to estimate the incoming traffic bit rate and negotiate with the B-ISDN for bandwidth allocation. In this paper we propose an adaptive estimation method for connectionless DQDB MAN interworking with B-ISDN. Due to the inherent nature of DQDB, the time window of bandwidth estimation can be adjusted dynamically. This results in a smaller fluctuation of required bandwidth estimation, so the gateway doesn't need to renegotiate frequently. In addition, based on the knowledge of bandwidth required, we propose a strategy for bandwidth allocation. Performance results are compared for the following schemes: adaptive time window, fixed time window, fixed cell window and a buffer threshold scheme. It shows that the proposed scheme performs better than other such schemes.