Patent US5287544A successfully refreshed from Google Patents.
US5287544A
Expired / Lapsed
US
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Method of channel assignment by matching channel interference with channel link loss
Assignee: Motorola Solutions Inc
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Filing: 1991-10-17
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Granted: 1994-02-15
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Expires: 2011-10-17
Abstract
Abstract A method is offered of achieving a desired C/I ratio within a cellular system, at reduced transmitter power levels, by measuring a signal loss on a downlink between a base site transmitter (31) and mobile receiver (20) and calculating an uplink signal magnitude at a base site receiver. A communication channel is then selected from a number of communication channels based upon comparison of the uplink signal magnitude with pre-measured interference levels for each channel of the number of channels to produce a desired C/I ratio.
Inventors
- 👤 Barry J. Menich
- 👤 Jeffrey D. Bonta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:16
CPC Classifications
H; H04; H04B; H04B15/00; H04W; H04W72/00; H04W72/50; H04W72/54; H04W72/541; H04W36/00; H04W36/16; H04W36/20; H04W72/20; H04W72/21; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A method of achieving a desired C/I ratio within a cellular communication system, the method including the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) measuring a control signal on a downlink of a base site of the cellular communication system by a communication unit and communicating the measured signal value to the base site; C) determining a calculated link signal loss by comparing the communicated measured signal value with a magnitude of the control signal transmitted by the base site; and D) allocating a channel of the grouped unallocated channels to the communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 2
Independent Claim
129 words
A method of achieving a desired C/I ratio within a cellular communication system, the method including the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) measuring a control signal on a downlink of a base site of the cellular communication system by a communication unit and communicating the measured signal value to the base site; C) determining a calculated link signal loss by comparing the communicated measured signal value with a magnitude of the control signal transmitted by the base site; and D) allocating a channel of the grouped unallocated channels to the communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 3
Dependent Claim
48 words
The method as in claim 1 wherein the step of allocating a channel of the grouped unallocated channels to the communication unit further includes the step of determining a communicated signal level at the base site from the calculated link signal loss and a communication unit power setting.
Claim 4
Dependent Claim
56 words
The method as in claim 2 wherein the step of allocating a channel of the grouped unallocated channels to the communication unit further includes the step of selecting a channel from an interference group of the plurality of interference groups based upon the calculated link loss, the communication unit power setting and the desired C/I ratio.
Claim 5
Independent Claim
144 words
An apparatus for achieving a desired C/I ratio within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) means for measuring a control signal on a downlink of a base site of the cellular communication system by a communication unit and communicating the measured control signal value to the base site; C) means for receiving the measured control signal value from the communication unit and determining a calculated link signal loss by comparing the measured control signal value with a communicated control signal value from a transmission site; and D) means for allocating a channel of the grouped unallocated channels to the communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 6
Independent Claim
144 words
An apparatus for achieving a desired C/I ratio within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) means for measuring a control signal on a downlink of a base site of the cellular communication system by a communication unit and communicating the measured control signal value to the base site; C) means for receiving the measured control signal value from the communication unit and determining a calculated link signal loss by comparing the measured control signal value with a communicated control signal value from a transmission site; and D) means for allocating a channel of the grouped unallocated channels to the communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 7
Independent Claim
96 words
An apparatus for achieving a desired C/I ratio within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) means for determining a communicated signal level at a base site from a calculated link loss and a communication unit power setting; and C) means for allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 8
Independent Claim
96 words
An apparatus for achieving a desired C/I ratio within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics into a plurality of interference groups; B) means for determining a communicated signal level at a base site from a calculated link loss and a communication unit power setting; and C) means for allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and said interference groups to produce the desired C/I ratio.
Claim 9
Dependent Claim
40 words
The apparatus as in claim 5 wherein the means for allocating a channel to a communication unit further comprises means for selecting the channel from an interference group of the plurality of interference groups to produce the desired C/I ratio.
Claim 10
Independent Claim
109 words
A method for reducing interference within a cellular communication system, the method comprising the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics B) measuring a downlink control signal to produce a measured signal value and communicating the measured signal value to the base site; C) determining a calculated link signal loss by comparing the communicated measured signal value with a magnitude of the transmitted control signal; and D) allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio.
Claim 11
Independent Claim
109 words
A method for reducing interference within a cellular communication system, the method comprising the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics B) measuring a downlink control signal to produce a measured signal value and communicating the measured signal value to the base site; C) determining a calculated link signal loss by comparing the communicated measured signal value with a magnitude of the transmitted control signal; and D) allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio.
Claim 12
Independent Claim
86 words
A method for reducing interference within a cellular communication system, the method comprising the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics; B) determining a communicated signal level at a base site from a calculated link loss and a communication unit power level and C) allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio.
Claim 13
Independent Claim
86 words
A method for reducing interference within a cellular communication system, the method comprising the steps of: A) grouping unallocated channels having more similar than dissimilar measured interference characteristics; B) determining a communicated signal level at a base site from a calculated link loss and a communication unit power level and C) allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio.
Claim 14
Independent Claim
138 words
An apparatus for reducing interference within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics to produce a plurality of interference groups; B) means for measuring a downlink control signal and communicating the measured control signal value to a base site; C) means for receiving the communicated measured control signal value from the communication unit and determining a calculated link signal loss by comparing the measured control signal value with a communicated control signal value from a transmission site; and D) means for allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio at a relative minimum communication unit power level.
Claim 15
Independent Claim
138 words
An apparatus for reducing interference within a cellular communication system, the apparatus comprising: A) means for grouping unallocated channels having more similar than dissimilar measured interference characteristics to produce a plurality of interference groups; B) means for measuring a downlink control signal and communicating the measured control signal value to a base site; C) means for receiving the communicated measured control signal value from the communication unit and determining a calculated link signal loss by comparing the measured control signal value with a communicated control signal value from a transmission site; and D) means for allocating a channel of the grouped unallocated channels to a communication unit based, at least in part, upon the calculated link signal loss and the interference grouping to produce a desired carrier to interference ratio at a relative minimum communication unit power level.
Claim 16
Dependent Claim
41 words
The apparatus as in claim 9 wherein the means for allocating a channel to a communication unit further comprises means for determining a communicated signal level at the base site from the calculated link loss and a communication unit power setting.
Claim 17
Dependent Claim
40 words
The apparatus as in claim 9 wherein the means for allocating a channel to a communication unit further comprises means for selecting the channel from an interference group of the plurality of interference groups to produce a desired C/I ratio.
References Cited (Backward Citations)
US4736453A
Cited
US4670906A
Cited
US5093927A
Cited
US5203008A
Cited
US5038399A
Cited
US5203012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |