USH610H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular pager
Assignee: AT&T Inc
•
Filing: 1987-08-17
•
Granted: 1989-03-07
•
Expires: 2007-08-17
Abstract
Abstract A pager arranged for operation in a cellular radio system provides economy to subscribers and technological flexibility to a system operator. Paging service is available in any geographical area covered by the advanced mobile phone service system. Subscribers are thereby able to travel at will while continuing to receive page signals in the cellular system. A special set of geographically dispersed channels in the advanced mobile phone service system are dedicated nation-wide to signaling and call control functions. These channels are used by the pager to properly configure itself to receive a page signal. The pager scans these channels, tunes to the channel with the best received signal strength and synchronizes with a received data stream on this or a second best channel. The pager then awaits receipt of the page signal. The pager also automatically rescans the special channels periodically to insure that it is always tuned to the channel with the best received signal strength. Paging service to subscribers in a cellular radio system is provided by the pager when the full service of a cellular telephone is not desired. Alternatively, the pager is assigned the same number as an associated cellular telephone for providing a backup for telephone calls intended for the associated cellular telephone which is not "ON" because the subscriber is temporarily unavailable to answer the incoming call.
Inventors
- 👤 Joseph F. Focarile
- 👤 David B. Kunkee
- 👤 Robert T. Saizan
- 👤 Shyamal Sengupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:09
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
124 words
A receiver for operation in a multichannel radio system and for monitoring a digital data stream on a selected channel within the radio sytem, the receiver providing an alert indication in response to receipt of a predetermined digital signal within the data stream, the receiver comprising: means for scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; and means for determining the selected channel from the preselected group of channels, in response to the scanning means, the determining means comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level.
Claim 2
Dependent Claim
124 words
A receiver for operation in a multichannel radio system and for monitoring a digital data stream on a selected channel within the radio sytem, the receiver providing an alert indication in response to receipt of a predetermined digital signal within the data stream, the receiver comprising: means for scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; and means for determining the selected channel from the preselected group of channels, in response to the scanning means, the determining means comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level.
Claim 3
Dependent Claim
75 words
The receiver as recited in claim 1 further including means for selecting an alternative preselected group of channels, and means for determining the selected channel from the alternative preselected group of channels, the selected channel being determined by comparing the received signal level of the digital data stream of each channel in the alternative preselected group of channels, the selected channel being reflective of a transmitter at a location providing the optimum received signal level.
Claim 4
Dependent Claim
42 words
The receiver as recited in claim 1 further including means for providing distinctive alert indications in response to receipt of multiple digital signals in the digital data stream, each one of the distinctive alert indications being reflective of a predetermined digital signal.
Claim 5
Dependent Claim
44 words
The receiver as recited in claim 1 further including means for monitoring the received signal level of the digital data stream on the selected channel, the monitoring means activating the selected channel determining means whenever the received signal level falls below a predetermined level.
Claim 6
Dependent Claim
148 words
a receiver for operation in a multichannel mobile telephone system and for monitoring a digital data stream on a selected channel within the mobile telephone system, the receiver providing an alert indication in reponse to receipt of a predetermined digital signal within the data stream, the digital signal being indicative of an alerting signal for activating an associated mobile telepone, the receiver being separable from the mobile telephone and comprising: means for scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; and means for determining the selected channel from the preselected group of channels, in response to the scanning means, the determining means comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level.
Claim 7
Dependent Claim
148 words
a receiver for operation in a multichannel mobile telephone system and for monitoring a digital data stream on a selected channel within the mobile telephone system, the receiver providing an alert indication in reponse to receipt of a predetermined digital signal within the data stream, the digital signal being indicative of an alerting signal for activating an associated mobile telepone, the receiver being separable from the mobile telephone and comprising: means for scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; and means for determining the selected channel from the preselected group of channels, in response to the scanning means, the determining means comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level.
Claim 8
Dependent Claim
46 words
The receiver as recited in claim 5 further including means responsive to the associated mobile telephone going off-hook, the off-hook means canceling the alert indication in response to receipt of a predetermined digital signal within the data stream reflecting that the mobile telephone has gone off-hook.
Claim 9
Independent Claim
115 words
A method of operating a receiver in a multichannel radio system and for monitoring a digital data stream on a selected channel within the radio system, the method comprising the steps of: scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; determining the selected channel from the preselected group of channels by comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level; and providing an alert indication in response to receipt of a predetermined digital signal within the data stream.
Claim 10
Independent Claim
115 words
A method of operating a receiver in a multichannel radio system and for monitoring a digital data stream on a selected channel within the radio system, the method comprising the steps of: scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; determining the selected channel from the preselected group of channels by comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level; and providing an alert indication in response to receipt of a predetermined digital signal within the data stream.
Claim 11
Dependent Claim
78 words
The method of operating a receiver as recited in claim 7 further including the steps of selecting an alternative preselected group of channels, and determining the selected channel from the alternative preselected group of channels, the selected channel being determined by comparing the received signal level of the digital data stream of each channel in the alternative preselected group of channels, the selected channel being reflective of a transmitter at a location providing the optimum received signal level.
Claim 12
Dependent Claim
47 words
The method of operating a receiver as recited in claim 7 further including the step of providing distinctive alert indications in response to receipt of multiple digital signals in the digital data stream, each one of the distinctive alert indications being reflective of a predetermined digital signal.
Claim 13
Dependent Claim
49 words
The method of operating a receiver as recited in claim 7 further including the step of monitoring the received signal level of the digital data stream on the selected channel, the monitoring step activating the selected channel determining step whenever the received signal level falls below a predetermined level.
Claim 14
Independent Claim
134 words
A method of operating a receiver in a multichannel mobile telephone system and for monitoring a digital data stream on a selected channel within the mobile telephone system, the method comprising the steps of: scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; determining the selected channel from the preselected group of channels, the determining step comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level; and providing an alert indication in response to receipt of a predetermined digital signal within the data stream, the digital signal being indicative of an alerting signal for activating an associated mobile telephone.
Claim 15
Independent Claim
134 words
A method of operating a receiver in a multichannel mobile telephone system and for monitoring a digital data stream on a selected channel within the mobile telephone system, the method comprising the steps of: scanning a preselected group of channels being transmitted from radio transmitters in a plurality of locations; determining the selected channel from the preselected group of channels, the determining step comparing the received signal level of the digital data stream of each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver the optimum received signal level; and providing an alert indication in response to receipt of a predetermined digital signal within the data stream, the digital signal being indicative of an alerting signal for activating an associated mobile telephone.
Claim 16
Dependent Claim
47 words
The method of operating a receiver as recited in claim 11 further including the step of canceling the alert indication, the canceling step being activated in response to receipt of a predetermined digital signal within the data stream reflecting that the associated mobile telephone has gone off-hook.
Claim 17
Dependent Claim
136 words
A multichannel radio paging system comprising: multiple transmitter means in a plurality of locations for transmitting a digital data stream on a preselected group of channels; receiver means for scanning the preselected group of channels being transmitted from radio transmitters within the transmitter means; means for determining a selected channel from the preselected group of channels, in response to the receiver means, the determining means comparing the received signal level of the digital data stream in each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver means the optimum received signal level; and means for monitoring the digital data stream on the selected channel, the monitoring means providing a page indication in response to receipt of a predetermined digital signal within the data stream.
Claim 18
Dependent Claim
136 words
A multichannel radio paging system comprising: multiple transmitter means in a plurality of locations for transmitting a digital data stream on a preselected group of channels; receiver means for scanning the preselected group of channels being transmitted from radio transmitters within the transmitter means; means for determining a selected channel from the preselected group of channels, in response to the receiver means, the determining means comparing the received signal level of the digital data stream in each of the preselected group of channels, the selected channel being reflective of a transmitter at a location providing to the receiver means the optimum received signal level; and means for monitoring the digital data stream on the selected channel, the monitoring means providing a page indication in response to receipt of a predetermined digital signal within the data stream.
References Cited (Backward Citations)
US3575558A
Cited
US3818145A
Cited
US4178475A
Cited
US4178476A
Cited
US4513443A
Cited
US4385295A
Cited
US4563680A
Cited
US4477808A
Cited
US4549311A
Cited
US4577060A
Cited
US4644347A
Cited
US4580285A
Cited
US4661972A
Cited
US4726050A
Cited
US4670906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |