US5940771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Network supporting roaming, sleeping terminals
Assignee: Avago Technologies International Sales Pte Ltd
•
Filing: 1995-10-19
•
Granted: 1999-08-17
•
Expires: 2015-10-19
Abstract
Abstract 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.
Inventors
- 👤 Charles D. Gollnick
- 👤 Ronald E. Luse
- 👤 John G. Pavek
- 👤 Marvin L. Sojka
- 👤 James D. Cnossen
- 👤 Arvin D. Danielson
- 👤 Ronald L. Mahany
- 👤 Mary L. Detweiler
- 👤 Gary N. Spiess
- 👤 Guy J. West
- 👤 Amos D. Young
- 👤 Robert C. Meier
- 👤 Keith K. Cargin, Jr.
- 👤 Richard C. Arensdorf
- 👤 Robert G. Geers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
G; G08; G08C; G08C17/00; G08C17/02; H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0023; H04L1/0025; H04L1/0032; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0225; G08C2201/00; G08C2201/20; H04B; H04B17/00; H04B17/0082; H04B17/0085; H04L69/00; H04L69/18; H04W52/0261; H04W52/0287; H04W52/029; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
145 words
A radio frequency data communication system that supports data collection within a premises, the radio frequency data communication system comprising: a plurality of roaming terminals operational within the premises; one or more base stations, each having a radio frequency transceiver, located within the premises; each of the one or more base stations transmitting a pending message list at each of selected time intervals; each of the plurality of roaming c terminals comprising a data collection system having a battery power supply and a radio frequency transceiver; the plurality of roaming terminals selectively communicative with the one or more base stations; and each of the plurality of roaming terminals selectively deactivating the radio frequency transceiver through a plurality of the selected time intervals, and synchronizing the activation of the radio frequency transceiver to receive the pending message list following the plurality of the selected time intervals.
Claim 2
Dependent Claim
145 words
A radio frequency data communication system that supports data collection within a premises, the radio frequency data communication system comprising: a plurality of roaming terminals operational within the premises; one or more base stations, each having a radio frequency transceiver, located within the premises; each of the one or more base stations transmitting a pending message list at each of selected time intervals; each of the plurality of roaming c terminals comprising a data collection system having a battery power supply and a radio frequency transceiver; the plurality of roaming terminals selectively communicative with the one or more base stations; and each of the plurality of roaming terminals selectively deactivating the radio frequency transceiver through a plurality of the selected time intervals, and synchronizing the activation of the radio frequency transceiver to receive the pending message list following the plurality of the selected time intervals.
Claim 3
Dependent Claim
36 words
The radio frequency data communication system of claim 1 wherein the one or more base stations transmit timing information regarding the selected time intervals along with each pending message list to the plurality of roaming terminals.
Claim 4
Dependent Claim
30 words
The radio frequency data communication system of claim 1 wherein the one or more base stations communicate timing information regarding the selected time intervals to the plurality of roaming terminals.
Claim 5
Dependent Claim
25 words
The radio frequency data communication system of claim 3 wherein the one or more base stations communicate the timing information during the selected time intervals.
Claim 6
Dependent Claim
18 words
The radio frequency data communication system of claim 1 wherein the data collection system comprises a code reader.
Claim 7
Dependent Claim
31 words
The radio frequency data communication system of claim 5 the data collection system operates in a low noise state when not collecting data to minimize interference with the radio frequency transceiver.
Claim 8
Dependent Claim
31 words
The radio frequency data communication system of claim 1 the data collection system operates in a low noise state when not collecting data to minimize interference with the radio frequency transceiver.
Claim 9
Dependent Claim
133 words
A radio frequency data communication system that supports data collection independent of wireless reception within a premises, the radio frequency data communication system comprising: a plurality of portable data collection systems operational within the premises; one or more base stations, each having a radio frequency transceiver, located within the premises; each of the plurality of portable data collection systems utilizing battery power, having a radio frequency transceiver, and operable in either a high or a low system clock rate; each of the plurality of portable data collection systems selectively communicative with the one or more base stations; when gathering data, operating at the high system clock rate; and each of the plurality of portable data collection systems normally operating at the low system clock rate to minimize interference with the radio frequency transceiver.
Claim 10
Dependent Claim
133 words
A radio frequency data communication system that supports data collection independent of wireless reception within a premises, the radio frequency data communication system comprising: a plurality of portable data collection systems operational within the premises; one or more base stations, each having a radio frequency transceiver, located within the premises; each of the plurality of portable data collection systems utilizing battery power, having a radio frequency transceiver, and operable in either a high or a low system clock rate; each of the plurality of portable data collection systems selectively communicative with the one or more base stations; when gathering data, operating at the high system clock rate; and each of the plurality of portable data collection systems normally operating at the low system clock rate to minimize interference with the radio frequency transceiver.
Claim 11
Dependent Claim
30 words
The radio frequency data communication system of claim 8 wherein each of the plurality of portable data collection systems selectively operate in a low noise state when not gathering data.
Claim 12
Dependent Claim
19 words
The radio frequency data communication system of claim 9 wherein the low noise state involves entering a sleep mode.
Claim 13
Dependent Claim
23 words
The radio frequency data communication system of claim 9 wherein each of the plurality of portable data collection systems comprise a code reader.
Claim 14
Dependent Claim
34 words
The radio frequency data communication system of claim 9 wherein each of the plurality of portable data collection systems selectively operate in a high noise state when gathering data to increase data input rates.
Claim 15
Dependent Claim
31 words
The radio frequency data communication system of claim 9 wherein each of the plurality of portable data collection systems operate in a high noise state by increasing a system clock rate.
Claim 16
Dependent Claim
55 words
The radio frequency data communication system of claim 8 wherein each of the plurality of portable data collection systems maintain the radio frequency transceiver energized for selected time intervals, and after such selected time intervals or after completion of a transmission occurring within such time intervals, turning the radio transceiver off to conserve battery power.
Claim 17
Dependent Claim
21 words
The radio frequency data communication system of claim 14 wherein the one or more base stations define the selected time intervals.
Claim 18
Dependent Claim
30 words
The radio frequency data communication system of claim 14 wherein the one or more base stations communicate timing information regarding the selected time intervals to the plurality of roaming terminals.
Claim 19
Dependent Claim
25 words
The radio frequency data communication system of claim 16 wherein the one or more base stations communicate the timing information during the selected time intervals.
References Cited (Backward Citations)
JPS5310206A
Cited
US4352955A
Cited
US4369443A
Cited
US4332027A
Cited
US4697244A
Cited
US4956783A
Cited
US4689786A
Cited
US4670899A
Cited
US4835372A
Cited
US4789983A
Cited
US5055660A
Cited
US5070536A
Cited
US4910794A
Cited
US4916441A
Cited
US4940974A
Cited
US4924462A
Cited
US5065003A
Cited
US5280650A
Cited
US5317691A
Cited
US5029183A
Cited
US5142550A
Cited
US5058200A
Cited
US5283568A
Cited
US5276680A
Cited
US5241542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-16 | 2003-02-15 | 2003-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-16 | 2007-02-15 | 2007-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-16 | 2011-02-15 | 2011-08-17 | $7700.00 | Window Closed / Lapsed |