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Synchronous Token Ring Protocol With Minimum Bandwidth Consumption

IP.com Disclosure Number: IPCOM000062510D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Bux, W [+details]

Abstract

This article is concerned with a token ring protocol which allows the transmission of synchronous information with minimum bandwidth consumption. In known token ring systems providing priority tokens at regular intervals for transmission of synchronous information in slotted frames, each such frame must circulate twice and is empty when issued from the synchronous bandwidth manager (SBM), and when returning to it. The invention suggests how to avoid the waste of bandwidth in this procedure. Each slotted frame for synchronous information circulates only once, and is then buffered in the SBM instead of being discarded. When a new slotted synchronous frame is to be released at the beginning of the next synchronous period, the SBM releases the buffered frame which carries on the information in it to the respective destinations.