H - Electricity – 04 – L
Patent
H - Electricity
04
L
344/25
H04L 12/52 (2006.01) H04J 3/16 (2006.01)
Patent
CA 1335834
Methods and apparatus are set forth which provide for the allocation of bandwidth for point-to-point, serial, bidirectional communication paths in a digital switching system. Bandwidth allocation is performed at both ends of a path (e.g. T1 line, IML, etc.) and may take place in either direction. Furthermore, according to the preferred embodiment of the invention, the Bandwidth Allocation Facility (BAF) at each end of a given path allocates bandwidth in integer multiples of maximum switching system granularity. The BAF also supports the implementation of user requests for any one of a plurality of allocation and boundry rules. To minimize the probability of contention and out of band signalling between the BAF pair associated with a given path, a front-to-back search mechanism is assigned for one BAF of the pair, while the other BAF utilizes a back-to-front search mechanism. In this way contention occurs only when a path's capacity nears exhuastion while uneven loading (one side of the path versus the other) is accommodated. Further yet, methods and apparatus are set forth which support rapid deallocation of bandwidth and status reporting.
612404
Berry Kirk H.
Mostafa Asghar D.
Data General Corporation
Macrae & Co.
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