A dual bus approach for LAN interworking with ATM networks

  • Authors:
  • Chiung-Shien Wu;Nen-Fu Huang;Gin-Kou Ma

  • Affiliations:
  • Computer and Communication Research Labs., Industrial Technology Research Institute, E000, Chutung, Hsinchu, Taiwan 310, R.O.C.;Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan 300, R.O.C.;Computer and Communication Research Labs., Industrial Technology Research Institute, E000, Chutung, Hsinchu, Taiwan 310, R.O.C.

  • Venue:
  • ACM SIGCOMM Computer Communication Review
  • Year:
  • 1995

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Abstract

The interworking between conventional legacy LANs and the ATM network plays an important role in the initial step of the ATM roadmap. This paper presents a dual bus approach for connecting LAN interworking units (IWU) to ATM networks. Several IWUs connecting heterogeneous LANs are configured into a dual bus structure and the end of the buses are directly connected to the ATM ports. Each IWU transforms the connectionless frame from the legacy LAN to fixed-length time-slots on the dual bus. To provide reliable connectionless services, a cell-based flow control scheme is proposed for dynamically adjusting the cell input rate so as to match with the current resources in the ATM switch. The scheme is further verified to be able to provide an optimal, best-effort and reliable interconnection scenario through simulations. The results show that the total throughput obtained by each local subnetwork dynamically matches with the cell processing throughput of the ATM switch. Besides, each IWU on the dual bus shares a fair bandwidth.