US5258995A
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US
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Wireless communication system
Assignee: Atmel Corp
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Filing: 1991-11-08
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Granted: 1993-11-02
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Expires: 2011-11-08
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
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: 24
Claim 1
Independent Claim
113 words
A spread spectrum wireless communication system for communicating between a base unit and a remote unit, said system comprising: means for transmitting using CDMA between the base unit and the remote unit in one of a plurality of frequency channels selected, wherein in one period of time the base unit transmits and in another period of time, different from the one period, the remote unit transmits; and 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, whereby the communication between the base unit and the remote unit is then effected over said another frequency channel.
Claim 2
Dependent Claim
113 words
A spread spectrum wireless communication system for communicating between a base unit and a remote unit, said system comprising: means for transmitting using CDMA between the base unit and the remote unit in one of a plurality of frequency channels selected, wherein in one period of time the base unit transmits and in another period of time, different from the one period, the remote unit transmits; and 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, whereby the communication between the base unit and the remote unit is then effected over said another frequency channel.
Claim 3
Dependent Claim
72 words
The system of claim 1 wherein said transmitting means comprises: means for transmitting a control signal between the base unit and the remote unit during a first portion of said one period and during a first portion of said another period, and for transmitting a data signal between the base unit and the remote unit during a second portion of said one period and during a second portion of said another period.
Claim 4
Dependent Claim
31 words
The system of claim 1 wherein said transmitting means further comprises: means for transmitting a sync signal from the base unit to the remote unit during said one period of time.
Claim 5
Dependent Claim
63 words
The system of claim 1 wherein said changing means further comprises: means, in the base unit, for detecting interference in the signal in the one frequency channel from the remote unit; means, in the base unit, for transmitting a signaling message to the remote unit to move to another frequency channel; and means, in the remote unit, to change to another frequency channel.
Claim 6
Dependent Claim
12 words
The system of claim 4 wherein said signaling message includes synchronization information.
Claim 7
Dependent Claim
108 words
A spread spectrum wireless communication method for communicating between a base unit and a remote unit, said method comprising: transmitting using CDMA between the base unit and the remote unit, in one of a plurality of frequency channels selected, wherein in one period of time the base unit transmits and in another period of time, different from the one period, the remote unit transmits; 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, whereby the communication between the base unit and the remote unit is then effected over said another frequency channel.
Claim 8
Dependent Claim
108 words
A spread spectrum wireless communication method for communicating between a base unit and a remote unit, said method comprising: transmitting using CDMA between the base unit and the remote unit, in one of a plurality of frequency channels selected, wherein in one period of time the base unit transmits and in another period of time, different from the one period, the remote unit transmits; 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, whereby the communication between the base unit and the remote unit is then effected over said another frequency channel.
Claim 9
Dependent Claim
51 words
The method of claim 6 wherein a control signal is transmitted during a first portion of said one period and during a first portion of said another period, and a data signal is transmitted during a second portion of said one period and during a second portion of said another period.
Claim 10
Dependent Claim
25 words
The method of claim 7 further comprising transmitting a synchronization signal from the base unit to the remote unit during said one period of time.
Claim 11
Dependent Claim
58 words
The method of claim 6 wherein said changing step further comprises: detecting, by the base unit, interference in the signal in the one frequency channel selected, from the remote unit; transmitting, by the base unit, a signaling message to the remote unit to move to another frequency channel; and changing, by the remote unit, to another frequency channel.
Claim 12
Dependent Claim
13 words
The method of claim 9 wherein the signaling message further comprises synchronization information.
Claim 13
Dependent Claim
102 words
A base unit for spread spectrum wireless communication with a remote unit, said base unit comprising: means for transmitting using CDMA in one of a plurality of frequency channels selected, in one period of time tot he remote unit; means for receiving using CDMA in said one of a plurality of frequency channels selected, in another period of time, difference from the one period, transmissions from the remote unit; and means for changing the transmission to another frequency channel in response to interference in the one frequency channel, whereby communication with the remote unit is then effected over said another frequency channel.
Claim 14
Dependent Claim
102 words
A base unit for spread spectrum wireless communication with a remote unit, said base unit comprising: means for transmitting using CDMA in one of a plurality of frequency channels selected, in one period of time tot he remote unit; means for receiving using CDMA in said one of a plurality of frequency channels selected, in another period of time, difference from the one period, transmissions from the remote unit; and means for changing the transmission to another frequency channel in response to interference in the one frequency channel, whereby communication with the remote unit is then effected over said another frequency channel.
Claim 15
Dependent Claim
41 words
The base unit of claim 11 wherein said transmitting means further comprising: means for transmitting a control signal during a first portion of said one period and a data signal encoded by CDMA during a second portion of said one period.
Claim 16
Dependent Claim
20 words
The base unit of claim 12 wherein said control signal further comprising: a sync signal and a common control signal.
Claim 17
Dependent Claim
40 words
The base unit of claim 13 wherein said receiving means further comprising: means for detecting transmission from the remote unit to produce a detected signal; and means for decoding said detected signal using CDMA to produce a decoded transmitted signal.
Claim 18
Dependent Claim
53 words
The base unit of claim 11 wherein said changing means further comprises: means for detecting interference in the signal in the one frequency channel selected from the remote unit; means for transmitting a signaling message to the remote unit to move to another frequency channel; and means for changing to another frequency channel.
Claim 19
Dependent Claim
13 words
The base unit of claim 15 wherein said signaling message includes synchronization information.
Claim 20
Dependent Claim
102 words
A remote unit for spread spectrum wireless communication with a base unit, said remote unit comprising: means for transmitting, using CDMA, in one of a plurality of frequency channels selected, in one period of time to the base unit; means for receiving, using CDMA, in said one of a plurality of frequency channels selected, in another period of time, different from the one period, transmission from the base unit; and means for changing the transmission to another frequency channel in response to a request from said base unit to change to another frequency in response to interference in said one frequency channel.
Claim 21
Dependent Claim
102 words
A remote unit for spread spectrum wireless communication with a base unit, said remote unit comprising: means for transmitting, using CDMA, in one of a plurality of frequency channels selected, in one period of time to the base unit; means for receiving, using CDMA, in said one of a plurality of frequency channels selected, in another period of time, different from the one period, transmission from the base unit; and means for changing the transmission to another frequency channel in response to a request from said base unit to change to another frequency in response to interference in said one frequency channel.
Claim 22
Dependent Claim
41 words
The remote unit of claim 17 wherein said transmitting means further comprising: means for transmitting a sync signal during a first portion of said one period and a data signal encoded by CDMA during a second portion of said one period.
Claim 23
Dependent Claim
22 words
The remote unit of claim 17 wherein said transmitting means further comprising: means for receiving a sync signal from the base unit.
Claim 24
Dependent Claim
40 words
The remote unit of claim 17 wherein said receiving means further comprising: means for detecting transmission from the base unit to produce a detected signal; and means for decoding said detected signal using CDMA to produce a decoded transmitted signal.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |