US6097956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accurate calculation of the probability of outage for the CDMA reverse link
Assignee: Nortel Networks Ltd
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Filing: 1997-10-24
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Granted: 2000-08-01
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Expires: 2017-10-24
Abstract
Abstract Accurate calculation of the probability of outage for a cell within a CDMA network is utilized to relate cell coverage to cell capacity. Based on a desired probability of outage, the coverage of the cell may be calculated for an average number of users within the cell. The calculation is independent of the admission policy employed to achieve the specified average number of users. The resulting closed form expression for the tradeoff between coverage and carried traffic allows an optimal design of a CDMA network.
Inventors
- 👤 Venugopal Veeravalli
- 👤 Andrew Sendonaris
- 👤 Nikhil Jain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:02
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/18
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
86 words
A method of selecting boundaries for cells within a wireless communications system, comprising: identifying an expected average number of users for a cell within the wireless communications system, wherein a base transceiver station is associated with the cell; determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users, wherein the coverage is less than a pole capacity of the cell; designating boundaries for the cell using the coverage determined for the base transceiver station.
Claim 2
Independent Claim
86 words
A method of selecting boundaries for cells within a wireless communications system, comprising: identifying an expected average number of users for a cell within the wireless communications system, wherein a base transceiver station is associated with the cell; determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users, wherein the coverage is less than a pole capacity of the cell; designating boundaries for the cell using the coverage determined for the base transceiver station.
Claim 3
Dependent Claim
48 words
The method of claim 1, wherein the step of determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users further comprises: determining a required received power from the expected average number of users within the cell.
Claim 4
Dependent Claim
44 words
The method of claim 1, wherein the step of determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users further comprises: determining the coverage provided by the base transceiver station from ##EQU9##
Claim 5
Dependent Claim
82 words
A wireless communications system, comprising: a plurality of contiguous cells, each cell within the plurality of cells having a coverage providing a selected probability of outage for an expected average number of users within the respective cell, wherein the selected probability of outage is determined from a probability that a required received power, a path loss, and a shadow fading for a mobile unit within the cell cumulatively exceed a limit of transmitted power defined by a reverse link power control loop.
Claim 6
Dependent Claim
82 words
A wireless communications system, comprising: a plurality of contiguous cells, each cell within the plurality of cells having a coverage providing a selected probability of outage for an expected average number of users within the respective cell, wherein the selected probability of outage is determined from a probability that a required received power, a path loss, and a shadow fading for a mobile unit within the cell cumulatively exceed a limit of transmitted power defined by a reverse link power control loop.
Claim 7
Dependent Claim
32 words
The wireless communications system of claim 4, wherein the expected average number of users for each cell within the plurality of cells is less than a pole capacity for the respective cell.
Claim 8
Dependent Claim
20 words
The wireless communications system of claim 4, wherein the selected probability of outage is determined from a probability of ##EQU10##
Claim 9
Dependent Claim
45 words
The wireless communications system of claim 4, further comprising: a base transceiver station within each cell within the plurality of cells; and at least one switch, wherein base transceiver stations for cells within the plurality of cells are connected to the at least one switch.
Claim 10
Dependent Claim
19 words
The wireless communications system of claim 4, wherein the wireless communications system is a code division multiple access system.
Claim 11
Dependent Claim
61 words
A cell within a wireless communications system, comprising: a base transceiver station providing communications for an expected average number of users within the cell with a selected probability of outage, wherein the base transceiver station provides a signal path including a forward link and a reverse link through an air interface to mobile units for the expected average number of users.
Claim 12
Dependent Claim
61 words
A cell within a wireless communications system, comprising: a base transceiver station providing communications for an expected average number of users within the cell with a selected probability of outage, wherein the base transceiver station provides a signal path including a forward link and a reverse link through an air interface to mobile units for the expected average number of users.
Claim 13
Dependent Claim
50 words
The cell of claim 9, wherein the selected probability of outage is determined from a probability that a required received power, a path loss, and a shadow fading for a mobile unit within the cell cummulatively exceed a limit of transmitted power defined by a reverse link power control loop.
Claim 14
Dependent Claim
18 words
The cell of claim 9, wherein the selected probability of outage is determined from a probability of ##EQU11##
Claim 15
Dependent Claim
14 words
The cell of claim 9, wherein a coverage for the cell is determined by
Claim 16
Dependent Claim
21 words
The cell of claim 9, wherein the expected average number of users is less than a pole capacity for the cell.
Claim 17
Dependent Claim
23 words
The cell of claim 9, wherein the base transceiver station is configured for operation in a code division multiple access wireless communications system.
Claim 18
Dependent Claim
102 words
A computer program product for use with a data processing system, comprising: a computer usable medium; first instructions on said computer usable medium for receiving an expected average number of users for a cell within the wireless communications system, wherein a base transceiver station is associated with the cell; second instructions on said computer usable medium for determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users; and third instructions on said computer usable medium for designating boundaries for the cell using the coverage determined for the base transceiver station.
Claim 19
Dependent Claim
102 words
A computer program product for use with a data processing system, comprising: a computer usable medium; first instructions on said computer usable medium for receiving an expected average number of users for a cell within the wireless communications system, wherein a base transceiver station is associated with the cell; second instructions on said computer usable medium for determining a coverage provided by the base transceiver station with a selected probability of outage for the expected average number of users; and third instructions on said computer usable medium for designating boundaries for the cell using the coverage determined for the base transceiver station.
Claim 20
Dependent Claim
30 words
The computer program product of claim 15, wherein the second instructions further comprise: instructions for determining a required received power from the expected average number of users within the cell.
Claim 21
Dependent Claim
26 words
The computer program product of claim 15, wherein the second instructions further comprise: instructions for determining the coverage provided by the base transceiver station from ##EQU12##
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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) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |