Patent US6243371B1 successfully refreshed from Google Patents.
US6243371B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for interference avoidance in a wireless communication system
Assignee: AT&T Inc
•
Filing: 1997-12-16
•
Granted: 2001-06-05
•
Expires: 2017-12-16
Abstract
Abstract A method and apparatus for managing interference in a wireless communications system. Each base generates a predictable beam-off sequence, and terminals measure the received signal over time. This received signal is then used to estimate or measure performance to schedule transmissions to the terminal.
Inventors
- 👤 Kapil K. Chawla
- 👤 Xiaoxin Qiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:00
CPC Classifications
H; H04; H04B; H04B17/00; H04B17/20; H04B17/29; H04W; H04W16/00; H04W16/02; H04W16/10; H04W16/24; H04W84/00; H04W84/02; H04W84/10; H04W84/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
A method for managing interference in a wireless communications system comprising the steps of: (a) Estimating the performance of a receiver in a first cell during a plurality of time slots during a beam-off sequence of a transmitter in a second cell; and (b) determining a preferred transmission time slot based upon the estimate of the receiver's performance.
Claim 2
Independent Claim
58 words
A method for managing interference in a wireless communications system comprising the steps of: (a) Estimating the performance of a receiver in a first cell during a plurality of time slots during a beam-off sequence of a transmitter in a second cell; and (b) determining a preferred transmission time slot based upon the estimate of the receiver's performance.
Claim 3
Dependent Claim
16 words
The method of claim 1 , wherein step (a) is performed at the receiver's serving transmitter.
Claim 4
Dependent Claim
41 words
The method of claim 1 , wherein step (a) is performed at the receiver, and further comprising the step of (c) receiving, by the serving transmitter, a signal from the receiver that contains information about the estimate of the receiver's performance.
Claim 5
Dependent Claim
36 words
The method of claim 1 , further comprising the step of (c) performing a beam-off sequence in a plurality of sectors within the cells by switching off a transmitter's beam according to a generated beam-off sequence.
Claim 6
Independent Claim
80 words
An apparatus for managing interference in a wireless communications system comprising: (a) a receiver processor; (b) a receiver memory that stores instructions adapted to be executed by said receiver processor to: (i) receive a signal in a plurality of time slots during a beam-off sequence; (ii) determine a preferred transmission time slot based upon the received signal; and (c) a receiver port through which signals are received, with said receiver port and said receiver memory coupled to said receiver processor.
Claim 7
Independent Claim
80 words
An apparatus for managing interference in a wireless communications system comprising: (a) a receiver processor; (b) a receiver memory that stores instructions adapted to be executed by said receiver processor to: (i) receive a signal in a plurality of time slots during a beam-off sequence; (ii) determine a preferred transmission time slot based upon the received signal; and (c) a receiver port through which signals are received, with said receiver port and said receiver memory coupled to said receiver processor.
Claim 8
Dependent Claim
42 words
The apparatus in claim 5 , further comprising: (b) a receiver memory storing instructions adapted to be executed by said receiver processor to (i) estimate the performance of the receiver in different time slots; (ii) transmit the estimate to a base transmitter.
Claim 9
Independent Claim
72 words
An apparatus for managing interference in a wireless communications system comprising: (a) a transmitter processor; (b) a transmitter memory that stores instructions adapted to be executed by said transmitter processor to schedule a transmission based upon the performance of the receiver over a plurality of time slots during a beam-off sequence; and (c) a port through which signals sent, with said transmitter port and said transmitter memory coupled to said transmitter processor.
Claim 10
Independent Claim
72 words
An apparatus for managing interference in a wireless communications system comprising: (a) a transmitter processor; (b) a transmitter memory that stores instructions adapted to be executed by said transmitter processor to schedule a transmission based upon the performance of the receiver over a plurality of time slots during a beam-off sequence; and (c) a port through which signals sent, with said transmitter port and said transmitter memory coupled to said transmitter processor.
Claim 11
Dependent Claim
28 words
The apparatus in claim 7 , further comprising a transmitter memory that stores instructions adapted to be executed by said transmitter processor to generate a predictable beam-off sequence.
Claim 12
Dependent Claim
37 words
The apparatus in claim 7 , further comprising: (d) a transmitter memory storing instructions adapted to be executed by said transmitter processor to estimate the performance of the receiver based on information set from a receiving device.
Claim 13
Independent Claim
59 words
A system for managing interference in a wireless communication system comprising: (a) means for estimating the performance of a receiver in a first cell during a plurality of time slots during a beam-off sequence of a transmitter in a second cell; and (b) means for determining a preferred transmission time slot based upon the estimate of the receiver's performance.
Claim 14
Independent Claim
59 words
A system for managing interference in a wireless communication system comprising: (a) means for estimating the performance of a receiver in a first cell during a plurality of time slots during a beam-off sequence of a transmitter in a second cell; and (b) means for determining a preferred transmission time slot based upon the estimate of the receiver's performance.
Claim 15
Dependent Claim
16 words
The system of claim 10 , wherein step (a) is performed at the receiver's serving transmitter.
References Cited (Backward Citations)
US5862130A
Cited
US5764631A
Cited
US5903840A
Cited
US6108322A
Cited
US5995498A
Cited
US6002673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-06-04 | 2004-12-04 | 2005-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-04 | 2008-12-04 | 2009-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-04 | 2012-12-04 | 2013-06-05 | $7700.00 | Window Closed / Lapsed |