US5666356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling calls in a code division multiple access system
Assignee: Google Technology Holdings LLC
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Filing: 1995-10-04
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Granted: 1997-09-09
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Expires: 2015-10-04
Abstract
Abstract A method and apparatus for blocking a call attempt in a CDMA system. The method includes the steps of receiving a call attempt request to be placed over a target cell of the CDMA system (202), calculating an effective load for the cell (204), comparing the effective load to a threshold (206), and denying the call attempt request by sending a denial message if the effective load exceeds the threshold (212). The apparatus includes a base station (101) and a base station controller (200) coupled to the base station (101). The base station (101) includes a plurality of transceivers (120) providing a radio communication channel and defining a target cell (130). The base station controller (200) receives a call attempt request to be placed over one of the transceivers (120) of the base station (101). The base station controller (200) calculates an effective load for the base station (101), compares the effective load to a threshold, and denies the call attempt request by sending a denial message if the effective load exceeds the threshold.
Inventors
- 👤 Philip Joseph Fleming
- 👤 Aleksandr Stolyar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:38
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/02; H04W48/06; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/2912; H04W36/00; H04W36/16; H04W36/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A method of controlling a call in a code division multiple access, CDMA, system comprising the steps of: receiving a call attempt request to be placed over a target cell of the CDMA system; calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for the target cell; comparing the effective load to a threshold; and denying the call attempt request by sending a denial message if the effective load exceeds the threshold.
Claim 2
Independent Claim
88 words
A method of controlling a call in a code division multiple access, CDMA, system comprising the steps of: receiving a call attempt request to be placed over a target cell of the CDMA system; calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for the target cell; comparing the effective load to a threshold; and denying the call attempt request by sending a denial message if the effective load exceeds the threshold.
Claim 3
Independent Claim
122 words
A method of selecting a carrier from a group of carriers supported by a target cell of a code division multiple access, CDMA, system comprising the steps of: calculating a first effective load based on a measurement indicative of non-target cell interference or a member of calls in soft handoff with the target cell for a first carrier of the group of carriers; calculating a second effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a second carrier of the group of carriers; comparing the first effective load to the second effective load; and selecting one of the first and second carriers in response to the comparison.
Claim 4
Independent Claim
122 words
A method of selecting a carrier from a group of carriers supported by a target cell of a code division multiple access, CDMA, system comprising the steps of: calculating a first effective load based on a measurement indicative of non-target cell interference or a member of calls in soft handoff with the target cell for a first carrier of the group of carriers; calculating a second effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a second carrier of the group of carriers; comparing the first effective load to the second effective load; and selecting one of the first and second carriers in response to the comparison.
Claim 5
Independent Claim
121 words
An apparatus for selectively blocking a call attempt in a code division multiple access, CDMA, system base station comprising: a base station including a plurality of transceivers providing a radio communication channel and defining a target cell; a base station controller coupled to the base station; said base station controller receiving a call attempt request to be placed over one of the transceivers of the base station; said base station controller calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell, comparing the effective load to a threshold, and denying the call attempt request by sending a denial message if the effective load exceeds the threshold.
Claim 6
Independent Claim
121 words
An apparatus for selectively blocking a call attempt in a code division multiple access, CDMA, system base station comprising: a base station including a plurality of transceivers providing a radio communication channel and defining a target cell; a base station controller coupled to the base station; said base station controller receiving a call attempt request to be placed over one of the transceivers of the base station; said base station controller calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell, comparing the effective load to a threshold, and denying the call attempt request by sending a denial message if the effective load exceeds the threshold.
Claim 7
Dependent Claim
21 words
The apparatus of claim 3, wherein the non-target cell interference is estimated based on an inverse of a propagation law exponent.
Claim 8
Dependent Claim
119 words
A code division multiple access, CDMA, system comprising: a base station including a plurality of transceivers providing a radio communication channel and defining a target cell; a communication unit located within the target cell; a base station controller coupled to the base station; said base station controller receiving a call attempt request from the communication unit over the radio communication channel; said base station controller calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell, comparing the effective load to a threshold, and denying the call attempt request by sending a denial message to the communication unit if the effective load exceeds the threshold.
Claim 9
Dependent Claim
119 words
A code division multiple access, CDMA, system comprising: a base station including a plurality of transceivers providing a radio communication channel and defining a target cell; a communication unit located within the target cell; a base station controller coupled to the base station; said base station controller receiving a call attempt request from the communication unit over the radio communication channel; said base station controller calculating an effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell, comparing the effective load to a threshold, and denying the call attempt request by sending a denial message to the communication unit if the effective load exceeds the threshold.
Claim 10
Independent Claim
127 words
An apparatus for selecting a carrier from a group of carriers supported by a target cell of a code division multiple access, CDMA, system comprising: means for calculating a first effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a first carrier of the group of carriers; means for calculating a second effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a second carrier of the group of carriers; means for comparing the first effective load to the second effective load; and means for selecting one of the first and second carriers in response to the comparison.
Claim 11
Independent Claim
127 words
An apparatus for selecting a carrier from a group of carriers supported by a target cell of a code division multiple access, CDMA, system comprising: means for calculating a first effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a first carrier of the group of carriers; means for calculating a second effective load based on a measurement indicative of non-target cell interference or a number of calls in soft handoff with the target cell for a second carrier of the group of carriers; means for comparing the first effective load to the second effective load; and means for selecting one of the first and second carriers in response to the comparison.
Claim 12
Dependent Claim
22 words
The apparatus of claim 6, wherein the CDMA system comprises one of a personal communication system and a wireless local loop system.
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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) | 2000-09-08 | 2001-03-10 | 2001-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-08 | 2005-03-10 | 2005-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-08 | 2009-03-10 | 2009-09-09 | $7700.00 | Window Closed / Lapsed |