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ECHO BACK SCANNING (EBS) AIR TIME REDUCTION PROTOCOL FOR SYNTHESIZED PAGERS

IP.com Disclosure Number: IPCOM000007417D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2002-Mar-25
Document File: 2 page(s) / 98K

Publishing Venue

Motorola

Related People

Mark Aronson: AUTHOR [+2]

Abstract

Currently, scanning pagers have one way com- munication only and there is no capability of auto- matically tracking pager location. Therefore, either duplicate messaging or user identification of current location is necessary. If these tracking requirements are not met, transmitted pages are lost during transit from one reception area to another. Echo1 Back Scan- ning (EBS) protocol solves these problems. Echo Back Scanning will also repeat missed pages in recep- tion range and allow for pagers to be moved from one overlapping system to another for various applications.

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MOTOROLA Technical Developments Volume24 March 1995

ECHO BACK SCANNING (EBS) AIR TIME REDUCTION PROTOCOL FOR SYNTHESIZED PAGERS

by Mark Aronson and Rick Johnson

  Currently, scanning pagers have one way com- munication only and there is no capability of auto- matically tracking pager location. Therefore, either duplicate messaging or user identification of current location is necessary. If these tracking requirements are not met, transmitted pages are lost during transit from one reception area to another. Echo1 Back Scan- ning (EBS) protocol solves these problems. Echo Back Scanning will also repeat missed pages in recep- tion range and allow for pagers to be moved from

one overlapping system to another for various applications.

  This protocol is a combination of scanning and echo back pager technology. The pager would scan channels by searching for a System IDentilication (SID) code on each channel for a programmable period oftime. If the code is found, the pager would handshake with the paging system and lock to the channel until out of range. When the pager is in the scan mode, searching for a channel, new messages are buffered in the EBS controller (Figure 2), until the pager locks to a new paging system (Figure 2). During each new scan, the pager would try to cor- relate to the code plug programmed SID code. Alter a successlid correlation to the SID code, the pager would handshake with the paging system and lock to the transmitted paging system channel (Figure

EBS Pager Modes

1). The handshake consists of the pager correlating SID and signaling the correlation to the local sys- tem. The active paging system would then request all buffered messages from the EBS controller and forward them to the pager. All new messages routed through the EBS controller would be forwa...