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Procedure for the Dynamic Switching of Data Channels on a Ring

IP.com Disclosure Number: IPCOM000057654D
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Boettiger, H Fischer, R Hehl, W Kraft, H Reichl, L [+details]

Abstract

On a very high-speed unidirectional ring of, say, 200 Mbits/s transmission bandwidth, a set of logically parallel channels or "pipes" of equal or different bandwidth can be defined by multiplexing the total bandwidth. Typically, it is assumed that there is a set of, say, 6 data pipes of a bandwidth of, say, 3 Mbytes/s and at least one medium speed auxiliary pipe of, say, 16 Mbits/s. The set of data pipes is available for assignment to links between ring nodes. Fig. 1 is a schematic of the occupation of the pipes for various logical links as a function of time with respect to a particular ring node. During normal operation, all pipes are busy transmitting data. If, in addition to existing data traffic, node A wants to transmit to node B, it makes a reservation request on the auxiliary channel.