US5398258A
Expired / Lapsed
US
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Wireless communication system
Assignee: Atmel Corp
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Filing: 1993-10-26
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Granted: 1995-03-14
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Expires: 2013-10-26
Abstract
Abstract In the present invention a wireless communication system is disclosed. A base unit communicates with a remote unit. The system comprises means for transmitting, using CDMA, between the base unit and the remote unit, in one of a plurality of frequencies channels selected. In one period of time, the base unit transmits and in another period of time, different from the one period, the remote unit transmits. Further, the system comprises means for changing the one frequency channel selected to another frequency channel, different from the one frequency channel, in response to interference in the one frequency channel. Thus, communication between the base unit and the remote unit is then affected over the another frequency channel.
Inventors
- 👤 Chun-Meng Su
- 👤 Saman Behtash
- 👤 Keith Jarett
- 👤 Huihung Lu
- 👤 Christopher Flores
- 👤 David G. Messerschmitt
- 👤 Edward Chien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:52
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/12; H03; H03M; H03M13/00; H03M13/31; H03M5/00; H03M5/02; H03M5/04; H03M5/14; H03M5/145; H04J3/00; H04J3/02; H04J3/06; H04J3/0602; H04J3/0605; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4906; H04L25/4908; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/72502; H04J13/00; H04J13/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
158 words
A full duplex wireless communication system for communicating between a base unit and a remote unit over a common frequency channel said system comprising: said base unit comprising: means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal; means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal; said remote unit comprising: means for receiving over said common frequency channel using CDMA in the one period of time from the base unit the sync signal, the first control signal, and the first data signal; and means for transmitting over said common frequency channel using CDMA in the another period of time to the base unit, the second control signal and the second data signal.
Claim 2
Dependent Claim
158 words
A full duplex wireless communication system for communicating between a base unit and a remote unit over a common frequency channel said system comprising: said base unit comprising: means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal; means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal; said remote unit comprising: means for receiving over said common frequency channel using CDMA in the one period of time from the base unit the sync signal, the first control signal, and the first data signal; and means for transmitting over said common frequency channel using CDMA in the another period of time to the base unit, the second control signal and the second data signal.
Claim 3
Dependent Claim
17 words
The system of claim 1 wherein said base unit communicates with a plurality of like remote units.
Claim 4
Dependent Claim
19 words
The system of claim 2 wherein said first control signal is received by the plurality of like remote units.
Claim 5
Dependent Claim
24 words
The system of claim 3 wherein said first data signal is CDMA encoded and is received by one of said plurality of remote units.
Claim 6
Dependent Claim
21 words
The system of claim 1 wherein said remote unit can be in one of three possible states: OFF, STANDBY and ON.
Claim 7
Dependent Claim
30 words
The system of claim 5 wherein said remote unit when in the STANDBY state transmits only said second control signal and receives only said sync signal and first control signal.
Claim 8
Dependent Claim
87 words
A base unit for communicating wirelessly in full duplex with a remote unit over a common frequency channel, said base unit comprising: means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal; and means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal.
Claim 9
Dependent Claim
87 words
A base unit for communicating wirelessly in full duplex with a remote unit over a common frequency channel, said base unit comprising: means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal; and means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal.
Claim 10
Dependent Claim
17 words
The system of claim 7 wherein said base unit communicates with a plurality of like remote units.
Claim 11
Dependent Claim
13 words
The system of claim 7 wherein said first data signal is CDMA encoded.
Claim 12
Dependent Claim
87 words
A remote unit for communicating wirelessly in full duplex with a base unit over a common frequency channel, said remote unit comprising: means for receiving over said common frequency channel using CDMA in one period of time from the base unit a sync signal, a first control signal, and a first data signal; and means for transmitting over said common frequency channel using CDMA in another period of time, different from the one period, to the base unit, a second control signal and a second data signal.
Claim 13
Dependent Claim
87 words
A remote unit for communicating wirelessly in full duplex with a base unit over a common frequency channel, said remote unit comprising: means for receiving over said common frequency channel using CDMA in one period of time from the base unit a sync signal, a first control signal, and a first data signal; and means for transmitting over said common frequency channel using CDMA in another period of time, different from the one period, to the base unit, a second control signal and a second data signal.
Claim 14
Dependent Claim
21 words
The system of claim 10 wherein said remote unit can be in one of three possible states: OFF, STANDBY and ON.
Claim 15
Dependent Claim
30 words
The system of claim 11 wherein said remote unit when in the STANDBY state transmits only said second control signal and receives only said sync signal and first control signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |