A simple multiple access protocol for metropolitan area networks

ABSTRACT

As LANs/MANs operate at higher speeds (100 Mb/s-Gb/s) and over longer distances (10's - 100's km) the access mechanism has to be chosen carefully so as to provide high utilization. Protocols are available that operate efficiently at high speeds and long distances. We describe here a particularly simple access mechanism referred to as Simple (S). Performance is simulated under a range of traffic, physical lengths, number of stations and overload conditions. S is compared with both Fasnet and the Distributed Queue Dual Bus (DQDB) schemes. It is almost as efficient as more complex protocols and its overload performance is well behaved.

REFERENCES

• 1: Ross, F.E., "FDDI - a tutorial", IEEE Communications Magazine, 24, No 5, pp 10-17, May 1986.
• 2: Falconer, R.M. and J.L. Adams, "Orwell: A protocol for an integrate services local network", Br. Telecom Technol. J., 3, No 4, pp 27-35 October 1985.
• 3: Newman, R.M., Z.L. Budrikis and J.L. Hullett, :The QPSX Man", IEEE Communications Magazine, 26, No 4, pp 20-28, April 1988.
• 4: Needham, R.M. and A. Hopper, "The Cambridge Fast Ring Networking System (CFR)", University Cambridge, Computer Laboratory, TR 90, June 1986.
• 5: Limb, J.O. and C Flores, "Description of F'asnet: A Unidirectional Local Area Communications l'letwork", B.S.T.J, 61, No 7, pp 1413-1440, September 1982.
• 6: Tobagi, F., F. Borgonovo, and L. Fratta, "Expressnet: A high performance integrated-services lozal area network", IEEE. Select. Areas Commun., SA, C.I,No. 5, November 1983.
• 7: Limb, J.O., "Load-Controlled Scheduling of Traffic on High Speed Metropolitan Area Networks", IEEE Transaction on Communications, 37, No 11, pp 1144- 1150, November 1989.
• 8: Marsan, M.A., and G. Albertengo, "Integrat.# voice and data network", Computer Communications, 5, No 3, pp 119-127, June 1982.
• 9: Levinson, F.H. and j O Limb, "Reconfigurable Collision Avoiding System, Station and Protocol for a Two Path, Multiple Access Digital Communications System", U.S. patent 4, 542,502, September 17, 1985.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.2 Network Protocols
          Subjects: Protocol architecture (OSI model)

Additional Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.5 Local and Wide-Area Networks
          Subjects: Access schemes; Buses

General Terms:
Design, Performance