US6104933A
Expired / Lapsed
US
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Method and apparatus for control of base stations in macro diversity radio systems
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1997-06-23
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Granted: 2000-08-15
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Expires: 2017-06-23
Abstract
Abstract A method and apparatus for controlling an amount of downlink power to be applied in each downlink transmission in a macro diversity radio system. Downlink power level is controlled in response to a quality measurement of a corresponding uplink. In accordance with exemplary embodiments, a path gain or a carrier-to-interference ratio of an uplink is measured at a base station in an active set, and subsequently used to proportionally govern a downlink transmission power level for a corresponding downlink. In such a fashion, each downlink handling a mobile station maintains a desired level of robustness, while avoiding introduction of unnecessary system interference.
Inventors
- 👤 Magnus Frodigh
- 👤 Fredric Kronestad
- 👤 Mikael Gudmunson
- 👤 Magnus Almgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:05
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/343; H04W52/18; H04W52/24; H04W52/346; H04W52/38; H04W52/40
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
77 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling more than one downlink signal so that a greatest amount of downlink signal transmission power is allocated to an active set link receiving a highest quality uplink signal.
Claim 2
Independent Claim
77 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling more than one downlink signal so that a greatest amount of downlink signal transmission power is allocated to an active set link receiving a highest quality uplink signal.
Claim 3
Dependent Claim
28 words
The method of claim 1, wherein a greatest amount of downlink signal transmission power is allocated to an active set base station receiving a highest quality uplink signal.
Claim 4
Dependent Claim
29 words
The method of claim 1, wherein a greatest amount of downlink signal transmission power is allocated to an active set antenna link corresponding to a highest quality uplink signal.
Claim 5
Dependent Claim
25 words
The method of claim 1, wherein the step of measuring a quality of an uplink signal comprises: measuring a path gain in the uplink signal.
Claim 6
Dependent Claim
25 words
The method of claim 1, wherein the step of measuring a quality of an uplink signal comprises: measuring a carrier-to-interference ratio of the uplink signal.
Claim 7
Dependent Claim
42 words
The method of claim 1, wherein the step of measuring a quality of an uplink signal is selected from the group consisting of: measuring a bit error rate for the uplink signal, and measuring a frame erasure rate for the uplink signal.
Claim 8
Dependent Claim
29 words
The method of claim 1, wherein the step of measuring a quality of an uplink signal comprises: measuring a quality of a carrier signal component of the uplink signal.
Claim 9
Independent Claim
75 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling more than one downlink signal so that a greatest amount of downlink signal is allocated to an active set link receiving a highest quality uplink signal.
Claim 10
Independent Claim
75 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling more than one downlink signal so that a greatest amount of downlink signal is allocated to an active set link receiving a highest quality uplink signal.
Claim 11
Dependent Claim
28 words
The apparatus of claim 8, wherein a greatest amount of downlink signal transmission power is allocated to an active set base station receiving a highest quality uplink signal.
Claim 12
Dependent Claim
29 words
The apparatus of claim 8, wherein a greatest amount of downlink signal transmission power is allocated to an active set antenna link corresponding to a highest quality uplink signal.
Claim 13
Dependent Claim
27 words
The apparatus of claim 8, wherein the means for measuring a quality of an uplink signal comprises: means for measuring a path gain in the uplink signal.
Claim 14
Dependent Claim
27 words
The apparatus of claim 8, wherein the means for measuring a quality of an uplink signal comprises: means for measuring a carrier-to-interference ratio of the uplink signal.
Claim 15
Dependent Claim
46 words
The apparatus of claim 8, wherein the means for measuring a quality of an uplink signal is selected from the group consisting of: means for measuring a bit error rate for the uplink signal, and means for measuring a frame erasure rate for the uplink signal.
Claim 16
Dependent Claim
31 words
The apparatus of claim 8, wherein the means for measuring a quality of an uplink signal comprises: means for measuring a quality of a carrier signal component of the uplink signal.
Claim 17
Independent Claim
104 words
A method for selecting a base station for inclusion in an active set of base stations communicating with a mobile station in a macro diversity system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; comparing the quality of the uplink signal with a predetermined quality requirement; and including the base station in the active set if the quality of the uplink signal meets or exceeds the predetermined quality requirement; wherein a number of base stations that can be added to the active set is dependent on a current traffic load.
Claim 18
Independent Claim
104 words
A method for selecting a base station for inclusion in an active set of base stations communicating with a mobile station in a macro diversity system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; comparing the quality of the uplink signal with a predetermined quality requirement; and including the base station in the active set if the quality of the uplink signal meets or exceeds the predetermined quality requirement; wherein a number of base stations that can be added to the active set is dependent on a current traffic load.
Claim 19
Independent Claim
140 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling downlink signal transmission power in response to the measure of quality of the uplink signal; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU4## where: P is a total power available; g i is a path gain for the uplink of link i; and n is a number of communication devices in the active set.
Claim 20
Independent Claim
140 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling downlink signal transmission power in response to the measure of quality of the uplink signal; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU4## where: P is a total power available; g i is a path gain for the uplink of link i; and n is a number of communication devices in the active set.
Claim 21
Dependent Claim
21 words
The method claimed in claim 16, wherein g i is an average path gain for the uplink of the link i.
Claim 22
Dependent Claim
20 words
The method claimed in claim 16, wherein the links are base station links and the communication devices are base stations.
Claim 23
Dependent Claim
20 words
The method claimed in claim 17, wherein the links are base station links and the communication devices are base stations.
Claim 24
Dependent Claim
18 words
The method claimed in claim 16, wherein the links are antenna links and the communication devices are antennas.
Claim 25
Dependent Claim
18 words
The method claimed in claim 17, wherein the links are antenna links and the communication devices are antennas.
Claim 26
Independent Claim
144 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling downlink signal transmission power in response to the measure of quality of the uplink signal; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU5## where: P is a total power available; C i /I i is a carrier-to-interference ratio for the uplink of the of link i; and n is a number of communication devices in the active set.
Claim 27
Independent Claim
144 words
A method for controlling transmission power used in a downlink signal from a base station to a mobile station in a macro diversity radio system, the method comprising the steps of: measuring a quality of an uplink signal received in the base station from the mobile station; and controlling downlink signal transmission power in response to the measure of quality of the uplink signal; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU5## where: P is a total power available; C i /I i is a carrier-to-interference ratio for the uplink of the of link i; and n is a number of communication devices in the active set.
Claim 28
Dependent Claim
23 words
The method of claim 22, wherein C i /I i is an average carrier-to-interference ratio measured for the uplink of the link i.
Claim 29
Dependent Claim
20 words
The method claimed in claim 22, wherein the links are base station links and the communication devices are base stations.
Claim 30
Dependent Claim
20 words
The method claimed in claim 23, wherein the links are base station links and the communication devices are base stations.
Claim 31
Dependent Claim
18 words
The method claimed in claim 22, wherein the links are antenna links and the communication devices are antennas.
Claim 32
Dependent Claim
18 words
The method claimed in claim 23, wherein the links are antenna links and the communication devices are antennas.
Claim 33
Independent Claim
151 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling the amount of transmission power used for the downlink signal power, the amount of transmission power being based on the quality of the uplink signal measured; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU6## where: P is a total power available; g i is a path gain for the uplink of link i; and n is a number of communication devices in the active set.
Claim 34
Independent Claim
151 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling the amount of transmission power used for the downlink signal power, the amount of transmission power being based on the quality of the uplink signal measured; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU6## where: P is a total power available; g i is a path gain for the uplink of link i; and n is a number of communication devices in the active set.
Claim 35
Dependent Claim
20 words
The apparatus of claim 28, wherein g i is an average path gain for the uplink of the link i.
Claim 36
Dependent Claim
19 words
The apparatus of claim 28, wherein the links are base station links and the communication devices are base stations.
Claim 37
Dependent Claim
19 words
The apparatus of claim 29, wherein the links are base station links and the communication devices are base stations.
Claim 38
Dependent Claim
17 words
The apparatus of claim 28, wherein the links are antenna links and the communication devices are antennas.
Claim 39
Dependent Claim
17 words
The apparatus of claim 29, wherein the links are antenna links and the communication devices are antennas.
Claim 40
Independent Claim
154 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling the amount of transmission power used for the downlink signal power, the amount of transmission power being based on the quality of the uplink signal measured; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU7## where: P is a total power available; C i /I i is a carrier-to-interference ratio for the uplink of the link i; and n is a number of communication devices in the active set.
Claim 41
Independent Claim
154 words
An apparatus for controlling transmission power used in a downlink between a base station and a mobile station in a macro diversity radio system, the apparatus comprising: means for measuring a quality of an uplink signal received in the base station from the mobile station; and means for controlling the amount of transmission power used for the downlink signal power, the amount of transmission power being based on the quality of the uplink signal measured; wherein an amount of downlink signal transmission power is proportional to the measure of quality of a corresponding uplink signal and an amount of downlink signal transmission power, P i , for a link i in an active set follows the proportion governed by: ##EQU7## where: P is a total power available; C i /I i is a carrier-to-interference ratio for the uplink of the link i; and n is a number of communication devices in the active set.
Claim 42
Dependent Claim
23 words
The apparatus of claim 34, wherein C i /I i is an average carrier-to-interference ratio measured for the uplink of the link i.
Claim 43
Dependent Claim
19 words
The apparatus of claim 34, wherein the links are base station links and the communication devices are base stations.
Claim 44
Dependent Claim
19 words
The apparatus of claim 35, wherein the links are base station links and the communication devices are base stations.
Claim 45
Dependent Claim
17 words
The apparatus of claim 30, wherein the links are antenna links and the communication devices are antennas.
Claim 46
Dependent Claim
17 words
The apparatus of claim 35, wherein the links are antenna links and the communication devices are antennas.
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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) | 2003-08-15 | 2004-02-14 | 2004-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-15 | 2008-02-14 | 2008-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-15 | 2012-02-14 | 2012-08-15 | $7700.00 | Window Closed / Lapsed |