IMPROVED ZONE CONTROLLER SERVICE METHOD

Publishing Venue

Motorola

Related People

Abstract

The current method of servicing asynchronous links (i.e. site links, MBX links, etc.) is a serial oriented process. The zone controller first checks to see which ports have data waiting, and then the data is read. Figure 1 demonstrates this. If 48 ports have data pending, port 1 will be processed, then port 2, and so on, until port 48 is the last one to have its data read.

MO7VROLA

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IMPROVED ZONE CONTROLLER SERVICE METHOD

by Mark Zollner

1 CURRENT SERVICE METHOD

OF ASYNCHRONOUS PORTS

  The current method of servicing asynchronous links (i.e. site links, MBX links, etc.) is a serial oriented process. The zone controller first checks to see which ports have data waiting, and then the data

is read. Figure 1 demonstrates this. If 48 ports have data pending, port 1 will be processed, then port 2, and so on, until port 48 is the last one to have its data read.

SITE 1 SITE 2 SITE 3 SITE 47 SITE 40

0 0 0 l ** 0 0

PORT 1 PORT 2 PORT 3 PORT 47 PORT 48

HIGHEST PRIORITY LOWEST PRIORITY

DIRECTION Of SERVICE

Fig. 1

  If a port has an ISW or other call activity infor- mation waiting on the link, it might take a while before it is processed. For example, in Figure 2, if ports 1 through 46 have a link maintenance packet and ports 47 and 48 have call information packets, it will take a long time before the call activity packets

are read from the link. In fact, ifit takes an % milli- second to process a port, it might take 23 millisec- onds (46 ports * % ms) before the call information is even read from the link. The time will even be longer since each link maintenance packet causes some other activity (i.e. acknowledgments to the sites).

SITE 1 SITE 2 SITE 3 SITE 47 SITE 48

@ @ @ l ** @ @

PORT 1 PORT 2 PORT 3 PORT 47 PORT 48

HIGHEST PRIORITY LOWEST PRIORITY

DIRECTION Of SERVICE

Fig. 2

0 Momala. 1°C. 19%

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MOTOROLA Technical Developments

2 IMPROVED METHOD OF involving ports 47 and 48, the...