Patent US4637785A successfully refreshed from Google Patents.
US5533019A
Expired / Lapsed
US
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Packet data in an analog cellular radiotelephone system
Assignee: Motorola Mobility LLC
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Filing: 1994-01-31
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Granted: 1996-07-02
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Expires: 2014-01-31
Abstract
Abstract A method and apparatus for circuit-switched and single-user traffic channel packet data communication in a cellular radiotelephone system, including a base station and mobile data unit both operable for establishing either a circuit-switched data call connection or a single-user connectionless packet data traffic channel via a radio channel, and communicating packet data over the established radio channel.
Inventors
- 👤 Jay P. Jayapalan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:22
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/12; H04W76/00; H04W76/10; H04L; H04L12/00; H04L12/64
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
168 words
An analog cellular radiotelephone system for communicating analog voice messages via radio channels to and from one or more mobile voice units, and additionally communicating user data via one or more of the radio channels, the system comprising: a mobile data unit operable for communicating user data via said one or more radio channels; and a base station comprising: one or more voice transceiver means for transmitting and receiving analog voice communications to and from said one or more mobile voice units; a data transceiver means for transmitting and receiving a plurality of digital data packets to and from said mobile data unit; and a base site controller comprising a means for establishing a packet data circuit-switched connection between the mobile data unit and a data end system, a means for establishing a packet-switched data transfer channel between the mobile data unit and the data end system, and means for determining when to establish the packet data circuit-switched connection and when to establish the packet-switched data transfer channel.
Claim 2
Dependent Claim
168 words
An analog cellular radiotelephone system for communicating analog voice messages via radio channels to and from one or more mobile voice units, and additionally communicating user data via one or more of the radio channels, the system comprising: a mobile data unit operable for communicating user data via said one or more radio channels; and a base station comprising: one or more voice transceiver means for transmitting and receiving analog voice communications to and from said one or more mobile voice units; a data transceiver means for transmitting and receiving a plurality of digital data packets to and from said mobile data unit; and a base site controller comprising a means for establishing a packet data circuit-switched connection between the mobile data unit and a data end system, a means for establishing a packet-switched data transfer channel between the mobile data unit and the data end system, and means for determining when to establish the packet data circuit-switched connection and when to establish the packet-switched data transfer channel.
Claim 3
Dependent Claim
30 words
The system of claim 1, wherein the means for establishing a packet-switched data transfer channel is operable to establish said data transfer channel using Cellular Digital Packet Data (CDPD) protocols.
Claim 4
Dependent Claim
57 words
The system of claim 1, wherein the mobile data unit comprises: a data processor operable for processing user data into a plurality of data packets; and subscriber unit means for converting said plurality of data packets into a bitstream of error encoded data blocks and modulating said bitstream for transmission over said one or more radio channels.
Claim 5
Dependent Claim
52 words
The system of claim 3, wherein the subscriber unit means comprises a processor operable for converting said plurality of data packets into a bitstream series of forward error correction (FEC), Reed Solomon encoded data blocks, and a modulator operable for modulating said bitstream into a gaussian minimum shift key (GMSK) modulated signal.
Claim 6
Dependent Claim
20 words
The system of claim 4, wherein the modulator is further operable for modulating the bitstream at a 19.2 Kbps rate.
Claim 7
Dependent Claim
36 words
The system of claim 3, wherein the data transceiver means is further operable for demodulating and error correcting a modulated bit stream transmitted from the mobile data unit into an error corrected plurality of data frames.
Claim 8
Dependent Claim
39 words
The system of claim 6, further comprising an inter working function means connected to the base station for detecting errors in said plurality of data frames and reconverting said plurality of data frames into said plurality of data packets.
Claim 9
Dependent Claim
53 words
The system of claim 1, wherein the base site controller further comprises means for establishing a further circuit-switched call connection via said one or more voice transceiver means, and said one or more voice transceiver means are operable for transmitting and receiving voiceband modulated data communications to and from the mobile data unit.
Claim 10
Dependent Claim
56 words
The system of claim 1, wherein the base site controller further comprises means for switching between the packet data circuit-switched call connection using the data transceiver means and a voice call connection using one of the voice transceiver means in response to a request from one of the mobile data unit and the data end system.
Claim 11
Dependent Claim
133 words
An analog cellular radiotelephone system for communicating analog voice messages via radio channels to and from one or more mobile voice units, and additionally communicating user data via one or more of the radio channels to and from a mobile data unit, the system comprising: a base station comprising: one or more voice transceivers for transmitting and receiving analog voice communications to and from said one or more mobile voice units; a data transceiver for transmitting and receiving a plurality of digital data packets to and from said mobile data unit; and a base site controller comprising a means for establishing a single-user hybrid data channel over one of the radio channels between the mobile data unit and a data end system, to communicate said user data to and from the mobile unit.
Claim 12
Dependent Claim
133 words
An analog cellular radiotelephone system for communicating analog voice messages via radio channels to and from one or more mobile voice units, and additionally communicating user data via one or more of the radio channels to and from a mobile data unit, the system comprising: a base station comprising: one or more voice transceivers for transmitting and receiving analog voice communications to and from said one or more mobile voice units; a data transceiver for transmitting and receiving a plurality of digital data packets to and from said mobile data unit; and a base site controller comprising a means for establishing a single-user hybrid data channel over one of the radio channels between the mobile data unit and a data end system, to communicate said user data to and from the mobile unit.
Claim 13
Dependent Claim
51 words
The system of claim 10, wherein the base site controller further comprises: means for establishing a packet-switched data transfer channel between the mobile data unit and the data end system; and means for determining when to establish the single-user hybrid data channel and when to establish a packet-switched data transfer channel.
Claim 14
Dependent Claim
54 words
The system of claim 10, wherein the base site controller further comprises means for establishing a circuit-switched call connection via said one or more voice transceiver means, and said one or more voice transceiver means are operable for transmitting and receiving voice band modulated data communications to and from a further mobile data unit.
Claim 15
Dependent Claim
115 words
A mobile unit for sending and receiving user data via one or more radio channels in an analog voice cellular radiotelephone system, the mobile unit comprising: a data processor operable to output a plurality of data packets; means for establishing a data call connection between the data processor and a data end system via said one or more radio channels, including means for establishing a packet data circuit-switched connection to the data end system, means for establishing a packet-switched data transfer channel to the data end system via the one or more radio channels, and means for determining when to establish the packet data circuit-switched connection and when to establish the packet-switched data transfer channel.
Claim 16
Dependent Claim
115 words
A mobile unit for sending and receiving user data via one or more radio channels in an analog voice cellular radiotelephone system, the mobile unit comprising: a data processor operable to output a plurality of data packets; means for establishing a data call connection between the data processor and a data end system via said one or more radio channels, including means for establishing a packet data circuit-switched connection to the data end system, means for establishing a packet-switched data transfer channel to the data end system via the one or more radio channels, and means for determining when to establish the packet data circuit-switched connection and when to establish the packet-switched data transfer channel.
Claim 17
Dependent Claim
38 words
The mobile unit of claim 13, further comprising a means for converting said plurality of data packets into a bitstream of error encoded data blocks and modulating said bitstream for transmission over said one or more radio channels.
Claim 18
Dependent Claim
53 words
The mobile unit of claim 13, wherein the means for converting comprises a processor operable for converting said plurality of data packets into a bitstream series of forward error correction (FEC), Reed Solomon encoded data blocks, and a modulator operable for modulating said bitstream into a gaussian minimum shift key (GMSK) modulated signal.
Claim 19
Dependent Claim
21 words
The mobile unit of claim 15, wherein the modulator is further operable for modulating the bitstream at a 19.2 Kbps rate.
Claim 20
Dependent Claim
37 words
The mobile unit of claim 13, wherein the means for converting and modulating is operable, when a packet-switched data transfer channel is established, to convert said plurality of data packets using Cellular Digital Packet Data (CDPD) protocols.
Claim 21
Dependent Claim
35 words
The mobile unit of claim 13, wherein said means for establishing a data call connection further comprises a means for establishing a further circuit-switched data call connection via a voice transceiver of said base station.
Claim 22
Dependent Claim
100 words
An analog cellular radiotelephone system for communicating analog voice messages and user data via radio channels to and from one or more mobile units, the system comprising: a mobile data unit; a base station operable for communicating user data via a radio channel with the mobile data unit, comprising a packet data transceiver operable for communicating packet data with the mobile data unit, and a base site controller operable for establishing a single-user hybrid data channel over the radio channel between the base station and the mobile data unit, to communicate said user data to and from the mobile unit.
Claim 23
Dependent Claim
100 words
An analog cellular radiotelephone system for communicating analog voice messages and user data via radio channels to and from one or more mobile units, the system comprising: a mobile data unit; a base station operable for communicating user data via a radio channel with the mobile data unit, comprising a packet data transceiver operable for communicating packet data with the mobile data unit, and a base site controller operable for establishing a single-user hybrid data channel over the radio channel between the base station and the mobile data unit, to communicate said user data to and from the mobile unit.
Claim 24
Independent Claim
60 words
A method of sending and receiving user data via radio channels in an analog cellular radiotelephone system, comprising the steps of: establishing a single-user hybrid data channel between a mobile unit and a base station over a particular radio channel; communicating a plurality of data packets between the mobile unit and the base station via said single-user hybrid data channel.
Claim 25
Independent Claim
60 words
A method of sending and receiving user data via radio channels in an analog cellular radiotelephone system, comprising the steps of: establishing a single-user hybrid data channel between a mobile unit and a base station over a particular radio channel; communicating a plurality of data packets between the mobile unit and the base station via said single-user hybrid data channel.
Claim 26
Independent Claim
77 words
A method of sending and receiving user data via radio channels in an analog cellular radiotelephone system, comprising the steps of: establishing a single-user hybrid data channel between a mobile unit and a data end system, the single-user hybrid data channel comprising a radio-link data call connection between the mobile unit and a base station; and communicating a plurality of data packets between the mobile unit and the data end system via said single-user hybrid data channel.
Claim 27
Independent Claim
77 words
A method of sending and receiving user data via radio channels in an analog cellular radiotelephone system, comprising the steps of: establishing a single-user hybrid data channel between a mobile unit and a data end system, the single-user hybrid data channel comprising a radio-link data call connection between the mobile unit and a base station; and communicating a plurality of data packets between the mobile unit and the data end system via said single-user hybrid data channel.
Claim 28
Dependent Claim
66 words
The method of claim 21, further comprising the steps of: prior to establishing the single-user hybrid data channel establishing a circuit-switched voice connection between the mobile unit and data end system; and switching from the circuit-switched voice connection to the single-user hybrid data channel while maintaining the particular radio channel in response to a request from one of the mobile unit and the data end system.
References Cited (Backward Citations)
US4654867A
Cited
US4707826A
Cited
US4718062A
Cited
USRE34034E
Cited
US4731785A
Cited
US4821259A
Cited
US4837800A
Cited
US4887265A
Cited
US5093827A
Cited
US5142534A
Cited
US5195090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |