US6233231B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission within a spread-spectrum communication system
Assignee: Google Technology Holdings LLC
•
Filing: 1998-12-03
•
Granted: 2001-05-15
•
Expires: 2018-12-03
Abstract
Abstract Remote units ( 113 ) having large amounts of data to transmit will be dynamically assigned Orthogonal Variable Spreading Factor (OVSF) codes corresponding to higher data rates and remote units ( 113 ) with lower amounts of data to be transmitted will be assigned OVSF codes corresponding to lower data rates. Additionally, in an alternate embodiment of the present invention, once system interference becomes greater than a predetermined threshold, the data rate between the base station ( 100 ) and remote units ( 113 ) in communication with the base station ( 100 ) is reduced. The reduction of the data rate between the base station ( 100 ) and remote units ( 113 ) occurs by changing the current OVSF codes utilized by both the remote units ( 113 ) and the base station ( 100 ).
Inventors
- 👤 Kenneth A. Felix
- 👤 Mark C. Cudak
- 👤 Amitava Ghosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:28
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/16; H04J13/18; H04J13/20; H04J13/0007; H04J13/004; H04J13/0044; H04L; H04L1/00; H04L1/0001; H04L1/0002
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining data bits to transmit to a remote unit, wherein the data bits include a remote unit identification and a first Walsh (OVSF) code for use by the remote unit; scrambling the data bits with a second Walsh (OVSF) code to produce scrambled data bits; and transmitting the scrambled data bits to the remote unit, wherein the remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the remote unit from the base station.
Claim 2
Independent Claim
99 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining data bits to transmit to a remote unit, wherein the data bits include a remote unit identification and a first Walsh (OVSF) code for use by the remote unit; scrambling the data bits with a second Walsh (OVSF) code to produce scrambled data bits; and transmitting the scrambled data bits to the remote unit, wherein the remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the remote unit from the base station.
Claim 3
Independent Claim
218 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining first data bits to transmit to a first remote unit from the base station, wherein the first data bits include a first remote unit identification and a first Walsh (OVSF) code for use by the remote unit; determining second data bits to transmit to a second remote unit from the base station, wherein the second data bits include a second remote unit identification and a second Walsh (OVSF) code for use by the second remote unit, wherein the second Walsh (OVSF) code differs from the first Walsh (OVSF) code; scrambling the first data bits with a third Walsh (OVSF) code to produce first scrambled data bits; scrambling the second data bits with the third Walsh (OVSF) code to produce second scrambled data bits; transmitting the first scrambled data bits to the first remote unit, wherein the first remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the first remote unit from the base station; and transmitting the second scrambled data bits to the second remote unit, wherein the second remote unit utilizes the second Walsh (OVSF) code to receive high-speed data transmitted to the second remote unit from the base station.
Claim 4
Independent Claim
218 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining first data bits to transmit to a first remote unit from the base station, wherein the first data bits include a first remote unit identification and a first Walsh (OVSF) code for use by the remote unit; determining second data bits to transmit to a second remote unit from the base station, wherein the second data bits include a second remote unit identification and a second Walsh (OVSF) code for use by the second remote unit, wherein the second Walsh (OVSF) code differs from the first Walsh (OVSF) code; scrambling the first data bits with a third Walsh (OVSF) code to produce first scrambled data bits; scrambling the second data bits with the third Walsh (OVSF) code to produce second scrambled data bits; transmitting the first scrambled data bits to the first remote unit, wherein the first remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the first remote unit from the base station; and transmitting the second scrambled data bits to the second remote unit, wherein the second remote unit utilizes the second Walsh (OVSF) code to receive high-speed data transmitted to the second remote unit from the base station.
Claim 5
Independent Claim
159 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining first data bits to transmit to a first remote unit from the base station, wherein the first data bits include a first remote unit identification and a first Walsh (OVSF) code for use by the remote unit; scrambling the first data bits with a second Walsh (OVSF) code to produce first scrambled data bits; transmitting the first scrambled data bits to the first remote unit, wherein the first remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the remote unit from the base station; and after the high-speed data has been transmitted to the first remote unit, transmitting second scrambled data bits to a second remote unit, wherein the second remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the second remote unit from the base station.
Claim 6
Independent Claim
159 words
A method for data transmission from a base station within a spread spectrum communication system, the method comprising the steps of: determining first data bits to transmit to a first remote unit from the base station, wherein the first data bits include a first remote unit identification and a first Walsh (OVSF) code for use by the remote unit; scrambling the first data bits with a second Walsh (OVSF) code to produce first scrambled data bits; transmitting the first scrambled data bits to the first remote unit, wherein the first remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the remote unit from the base station; and after the high-speed data has been transmitted to the first remote unit, transmitting second scrambled data bits to a second remote unit, wherein the second remote unit utilizes the first Walsh (OVSF) code to receive high-speed data transmitted to the second remote unit from the base station.
Claim 7
Independent Claim
74 words
An apparatus comprising: a static Walsh (OVSF) code scrambler having a remote unit identification and a first Walsh (OVSF) code as an input and outputting scrambled data, wherein the scrambled data comprises the remote unit identification and the first Walsh (OVSF) code scrambled by a second, static Walsh (OVSF) code; and a Cell Specific Scrambler having the scrambled data as an input and outputting the scrambled data further scrambled by a cell-specific scrambling code.
Claim 8
Independent Claim
74 words
An apparatus comprising: a static Walsh (OVSF) code scrambler having a remote unit identification and a first Walsh (OVSF) code as an input and outputting scrambled data, wherein the scrambled data comprises the remote unit identification and the first Walsh (OVSF) code scrambled by a second, static Walsh (OVSF) code; and a Cell Specific Scrambler having the scrambled data as an input and outputting the scrambled data further scrambled by a cell-specific scrambling code.
Claim 9
Independent Claim
87 words
An apparatus comprising: means for determining data bits to transmit to a remote unit, wherein the data bits include a remote unit identification and a first Walsh (OVSF) code for use by the remote unit; means for scrambling the data bits with a second Walsh (OVSF) code to produce scrambled data bits; and means for transmitting the scrambled data bits to the remote unit, wherein the remote unit utilizes the first Walsh (OVSF) code to receive second data transmitted to the remote unit from a base station.
Claim 10
Independent Claim
87 words
An apparatus comprising: means for determining data bits to transmit to a remote unit, wherein the data bits include a remote unit identification and a first Walsh (OVSF) code for use by the remote unit; means for scrambling the data bits with a second Walsh (OVSF) code to produce scrambled data bits; and means for transmitting the scrambled data bits to the remote unit, wherein the remote unit utilizes the first Walsh (OVSF) code to receive second data transmitted to the remote unit from a base station.
References Cited (Backward Citations)
US5719900A
Cited
US5841806A
Cited
US5204874A
Cited
US5991627A
Cited
US5537397A
Cited
US5812938A
Cited
US5594718A
Cited
US5754537A
Cited
US5940430A
Cited
US5903597A
Cited
US6034635A
Cited
US5970413A
Cited
US5946344A
Cited
US6108369A
Cited
US5930366A
Cited
US5956368A
Cited
US5956641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-14 | 2004-11-13 | 2005-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-14 | 2008-11-13 | 2009-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-14 | 2012-11-13 | 2013-05-15 | $7700.00 | Window Closed / Lapsed |