05940771 is referenced by 358 patents and cites 25 patents.

A data collection network supports roaming terminals which may enter and exit a sleep mode to conserve power. A plurality of base stations each periodically transmit pending message indications to those roaming data collection terminals in range. Instead of requiring the transceiver within each terminal to always be active, the receiver is activated in synchrony with the transmissions of pending message indications from at least one of the base stations. Otherwise, the terminal may deactivate the transceiver, i.e., place it in a sleep state. The terminal may also sleep through pluralities of transmissions of pending message indications, and, thereafter, awake in synchrony to receive subsequent pending message indications. To minimize noise, the terminal may operate using a lower frequency system clock when not collecting data. When collecting data, especially where processing time proves more critical, the system clock frequency is increased.

Title
Network supporting roaming, sleeping terminals
Application Number
699818
Publication Number
5940771
Application Date
October 19, 1995
Publication Date
August 17, 1999
Inventor
Robert G Geers
Cedar Rapids
IA, US
Richard C Arensdorf
Ely
IA, US
Keith K Cargin Jr
Cedar Rapids
IA, US
Robert C Meier
Cedar Rapids
IA, US
Amos D Young
Cedar Rapids
IA, US
Guy J West
Cedar Rapids
IA, US
Gary N Spiess
Lisbon
IA, US
Mary L Detweiler
Parnell
IA, US
Ronald L Mahany
Cedar Rapids
IA, US
Arvin D Danielson
Cedar Rapids
IA, US
James D Cnossen
Marion
IA, US
Marvin L Sojka
Cedar Rapids
IA, US
John G Pavek
Cedar Rapids
IA, US
Ronald E Luse
Marion
IA, US
Charles D Gollnick
Cedar Rapids
IA, US
Agent
Akin Gump Strauss Hauer & Feld L
Assignee
Norand Corporation
IA, US
IPC
H04B 7/26
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