Browse Prior Art Database

Gradual Reduction in Polling Frequency to Inactive Work Stations

IP.com Disclosure Number: IPCOM000102328D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Kiel, HG: AUTHOR [+3]

Abstract

Work Station Controllers (WSCs) support multiple work stations attached via a work station communication protocol. Work stations can include dependent displays, programmable work stations, and printers. The function of the WSC is to process host data streams, translate and process keystrokes, etc. A typical local WSC with attached work stations is shown in the figure. This disclosure describes how a timer is used in the WSC to gradually reduce polling frequency to inactive displays and programmable work stations resulting in improved WSC performance.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 57% of the total text.

Gradual Reduction in Polling Frequency to Inactive Work Stations

       Work Station Controllers (WSCs) support multiple work
stations attached via a work station communication protocol. Work
stations can include dependent displays, programmable work stations,
and printers.  The function of the WSC is to process host data
streams, translate and process keystrokes, etc.  A typical local WSC
with attached work stations is shown in the figure.  This disclosure
describes how a timer is used in the WSC to gradually reduce polling
frequency to inactive displays and programmable work stations
resulting in improved WSC performance.

      A WSC may use several different types of polling to dependent
displays or programmable work stations.  Two common types are
described below:
-    The WSC polls for keystrokes from a dependent display or a
request from a programmable work station to send data from the work
station to the host processor. Queueing could occur on either the
work station communication cable or on the WSC processor, resulting
in occasional higher times between polls.  This disclosure describes
how this polling frequency is gradually reduced to inactive work
stations.
-    After the WSC sends a command to a work station, the WSC polls
the work station (typically at a faster rate than above), until the
work station indicates the command has been processed.  The rate of
command completion polling is not affected by this disclosure.

      The keyst...