US6188914B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for improving link performance and capacity of a sectorized CDMA cellular communication network
Assignee: Nortel Networks Ltd
•
Filing: 1997-10-22
•
Granted: 2001-02-13
•
Expires: 2017-10-22
Abstract
Abstract A system and method for improving link performance and network capacity of a CDMA network is described. In a preferred embodiment, at each sector site, antennas having a relatively narrow horizontal beamwidth are used as transmit antennas, while antennas having a relatively wide horizontal beamwidth are used as receive antennas. Narrow beamwidth antennas are also used to implement hybrid transmit/receive antennas.
Inventors
- 👤 Ashvin Chheda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:43
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A method of improving link capacity of a sectorized code division multiple access (“CDMA”) network, the method comprising steps of: (a) installing at at least one sector site of said CDMA network a first antenna having a first beamwidth; and (b) installing at said at least one sector site of said CDMA network a second antenna having a second beamwidth; wherein said first beamwidth is greater than said second beamwidth; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 2
Independent Claim
87 words
A method of improving link capacity of a sectorized code division multiple access (“CDMA”) network, the method comprising steps of: (a) installing at at least one sector site of said CDMA network a first antenna having a first beamwidth; and (b) installing at said at least one sector site of said CDMA network a second antenna having a second beamwidth; wherein said first beamwidth is greater than said second beamwidth; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 3
Dependent Claim
38 words
The method of claim 1 further comprising: (c) installing at said at least one sector site of said CDMA network a third antenna having beamwidth equal to said first beamwidth, wherein said third antenna is a receive-only antenna.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein a sectorization of said CDMA network is three and wherein said first and second beamwidths are approximately 90° and 60°, respectively.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein a sectorization of said CDMA network is four and wherein said first and second beamwidths are approximately 60° and 40°, respectively.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein a sectorization of said CDMA network is six and wherein said first and second beamwidths are approximately 45° and 30°, respectively.
Claim 7
Dependent Claim
31 words
The method of claim 1 wherein said step (a) further comprises installing at each sector site of said CDMA network a first antenna having a beamwidth equal to said first beamwidth.
Claim 8
Dependent Claim
31 words
The method of claim 1 wherein said step (b) further comprises installing at each sector site of said CDMA network a second antenna having a beamwidth equal to said second beamwidth.
Claim 9
Dependent Claim
31 words
The method of claim 2 wherein said step (c) further comprises installing at each sector site of said CDMA network a third antenna having a beamwidth equal to said first beamwidth.
Claim 10
Dependent Claim
102 words
A code division multiple access (“CDMA”) network having improved link capacity and performance, the CDMA network comprising: a plurality of cells each comprising a plurality of sectors, wherein each of said sectors includes a sector site; a first antenna installed at each of said sector sites; and a second antenna installed at each of said sector sites; wherein at each sector site, a beamwidth of said first antenna of said sector site is greater than a beamwidth of said second antenna of said sector site; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 11
Dependent Claim
102 words
A code division multiple access (“CDMA”) network having improved link capacity and performance, the CDMA network comprising: a plurality of cells each comprising a plurality of sectors, wherein each of said sectors includes a sector site; a first antenna installed at each of said sector sites; and a second antenna installed at each of said sector sites; wherein at each sector site, a beamwidth of said first antenna of said sector site is greater than a beamwidth of said second antenna of said sector site; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 12
Dependent Claim
46 words
The CDMA network of claim 9 further comprising: a third antenna installed at each of said sector sites; wherein a beamwidth of each of said third antennas is equal to that of each of said first antennas and wherein the third antenna is a receive-only antenna.
Claim 13
Dependent Claim
32 words
The CDMA network of claim 9 wherein a sectorization of said CDMA network is three and wherein said beamwidths of each said first and second antennas are approximately 90° and 60°, respectively.
Claim 14
Dependent Claim
32 words
The CDMA network of claim 9 wherein a sectorization of said CDMA network is four and wherein said beamwidths of each said first and second antennas are approximately 60° and 40°, respectively.
Claim 15
Dependent Claim
31 words
The CDMA network of claim 9 wherein a sectorization of said CDMA network is six and wherein said beamwidths of each first and second antennas are approximately 45° and 30°, respectively.
Claim 16
Independent Claim
84 words
A method of improving link capacity of a sectorized code division multiple access (“CDMA”) network, the method comprising steps of: (a) installing at at least one sector site of said CDMA network a first antenna having a first beamwidth; and (b) installing at said at least one sector site of said CDMA network a second antenna having a second beamwidth equal to two-thirds of said first beamwidth; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 17
Independent Claim
84 words
A method of improving link capacity of a sectorized code division multiple access (“CDMA”) network, the method comprising steps of: (a) installing at at least one sector site of said CDMA network a first antenna having a first beamwidth; and (b) installing at said at least one sector site of said CDMA network a second antenna having a second beamwidth equal to two-thirds of said first beamwidth; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 18
Dependent Claim
104 words
A code division multiple access (“CDMA”) network having improved link capacity and performance, the CDMA network comprising: a plurality of cells each comprising a plurality of sectors, wherein each of said sectors includes a sector site; a first antenna installed at each of said sector sites; and a second antenna installed at each of said sector sites; wherein at each sector site, a beamwidth of said second antenna of said sector site is equal to two thirds the beamwidth of first second antenna of said sector site; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
Claim 19
Dependent Claim
104 words
A code division multiple access (“CDMA”) network having improved link capacity and performance, the CDMA network comprising: a plurality of cells each comprising a plurality of sectors, wherein each of said sectors includes a sector site; a first antenna installed at each of said sector sites; and a second antenna installed at each of said sector sites; wherein at each sector site, a beamwidth of said second antenna of said sector site is equal to two thirds the beamwidth of first second antenna of said sector site; and wherein said first antenna is a receive-only antenna and said second antenna is a transmit-only antenna.
References Cited (Backward Citations)
US5276907A
Cited
US5742911A
Cited
US5615409A
Cited
US5596333A
Cited
US5684491A
Cited
US5936577A
Cited
US5960349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-02-13 | 2004-08-14 | 2005-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-13 | 2008-08-14 | 2009-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-13 | 2012-08-14 | 2013-02-13 | $7700.00 | Window Closed / Lapsed |