Multiplex communications – Wide area network – Packet switching
Patent
1992-11-25
1994-11-22
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3408258, H04Q 1104
Patent
active
053675207
ABSTRACT:
A method and a system for routing cells in an ATM switch. The switch which is input buffered, employs a multiplicity of crosspoint switch planes operating simultaneously in parallel, and whose outputs are combined by an output-buffered second stage. A traffic controlling or path assignment switching stage disposed before the crosspoint switch planes improves performance in the presence of correlated traffic. The switching stage may either control the traffic randomly or adaptively. Input concentration and output expansion functions within the switch are also disclosed. The use of an "unfair" or a predictable preference contention resolution device (CRD) in each of the crosspoint switch planes is possible in another embodiment of the invention. Advantages of the method and system include linear growth with large N in the size and complexity of both the switching circuits and the contention resolution circuits. Switch performance tends to gracefully degrade with failures in switch planes and contention resolution devices. Dense, low-cost memory with simple FIFO addressing schemes can be used to realize both the input and output buffered stages.
REFERENCES:
patent: 4706150 (1987-11-01), Lebizay et al.
patent: 4929939 (1990-05-01), Varma et al.
patent: 4942574 (1990-07-01), Zelle
patent: 5020052 (1991-05-01), DePrycker et al.
patent: 5130975 (1992-07-01), Akata
patent: 5130984 (1992-07-01), Cisneros
patent: 5157654 (1992-10-01), Cisneros
patent: 5166926 (1992-11-01), Cisneros
patent: 5210744 (1993-05-01), Yamanaka et al.
Performance of a Non-Blocking Space Division Packet Switch in a Time Variant Non-Uniform Traffic Environment, M. J. Lee and S. Li, 1990 International Conference on Communications, Atlanta, Apr. 1990.
Large Packet Switch and Contention Resolution Device, Arturo Cisneros, XIII International Switching Symposium, Stockholm, Sweden, May 27-Jun. 1, 1990.
Performance of Packet Switches with Input and Output Queueing, I. Iliadis and W. Denzel, 1990 IEEE, pp. 0747-0753.
Bell Communcations Research, Inc.
Falk James W.
Olms Douglas W.
Suchyta Leonard Charles
Vu Huy D.
LandOfFree
Method and system for routing cells in an ATM switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for routing cells in an ATM switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for routing cells in an ATM switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1995904