Browse Prior Art Database

Program Status Latch

IP.com Disclosure Number: IPCOM000046672D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Crosthwait, WR Hallett, RJ Shabe, JE Sturtz, BR [+details]

Abstract

In a time-domain multiplex communications controller, a significant amount of the control operation is performed with software. Since the synchronization of a local station's transmissions over the TDMA (Time Domain Multiple Access) link must be precisely maintained with respect to the timing of other stations communicating on the link, it is important to detect control software failures in the local station as early as is possible in order to avoid making transmissions over the TDMA link during periods when synchronization is being lost. The program status latch invention described herein enables the periodic monitoring of the "health" of the control software within a station and the rapid shutdown of transmissions over the TDMA link when software failures are detected. The figure shows the program status latch invention.