CA2537143A1 - Method and system for quality-based power control in cellular communications systems - Google Patents
Method and system for quality-based power control in cellular communications systems Download PDFInfo
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- CA2537143A1 CA2537143A1 CA002537143A CA2537143A CA2537143A1 CA 2537143 A1 CA2537143 A1 CA 2537143A1 CA 002537143 A CA002537143 A CA 002537143A CA 2537143 A CA2537143 A CA 2537143A CA 2537143 A1 CA2537143 A1 CA 2537143A1
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- quality
- power control
- based power
- cellular communications
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Abstract
A method and system for quality-based transmission power control in a cellular communications system are disclosed, whereby a network operator can specify the transmission quality requirements using a measurement that better reflects the actual quality perceived by the users.
All transmitter'power levels in the network can be controlled by identical power regulators, each of which can adapt to individual traffic situations in order to achieve the specified quality. For example, in a GSM frequency-hopping network, the FER together with the parameters estimated from the current traffic situation, are mapped onto a target C/I, which in turn, the power control algorithm strives to achieve. Consequently, the power regulators can adapt to the traffic situation experienced by each receiver.
All transmitter'power levels in the network can be controlled by identical power regulators, each of which can adapt to individual traffic situations in order to achieve the specified quality. For example, in a GSM frequency-hopping network, the FER together with the parameters estimated from the current traffic situation, are mapped onto a target C/I, which in turn, the power control algorithm strives to achieve. Consequently, the power regulators can adapt to the traffic situation experienced by each receiver.
Claims (5)
1. A method for performing quality-based power control in a mobile communications system, comprising the steps of:
identifying at least one time delay;
determining if there are physical constraints involved in performing the quality-based power control;
if there are physical constraints involved in performing the quality-based power control, utilize at least one describing function to predict limits for oscillations in a local loop;
and if there are no physical constraints involved in performing the quality-based power control, determine locations of local loop poles that keep a power controller operating within a stability region.
identifying at least one time delay;
determining if there are physical constraints involved in performing the quality-based power control;
if there are physical constraints involved in performing the quality-based power control, utilize at least one describing function to predict limits for oscillations in a local loop;
and if there are no physical constraints involved in performing the quality-based power control, determine locations of local loop poles that keep a power controller operating within a stability region.
2. The method of claim 1, wherein said at least one time delay is equal to zero.
3. The method of claim 1 or 2, wherein said at least one describing function comprises at least one discrete time describing function.
4. The method of claim 1, 2 or 3, wherein it is determined that a set of controller parameters imply that said power controller is stable.
5. The method of any one of claims 1 to 4, wherein said limits comprise limits on power controller parameters.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/031,635 US6449462B1 (en) | 1998-02-27 | 1998-02-27 | Method and system for quality-based power control in cellular communications systems |
US09/031,635 | 1998-02-27 | ||
CA002322224A CA2322224C (en) | 1998-02-27 | 1999-02-23 | Method and system for quality-based power control in cellular communications systems |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002322224A Division CA2322224C (en) | 1998-02-27 | 1999-02-23 | Method and system for quality-based power control in cellular communications systems |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2537143A1 true CA2537143A1 (en) | 1999-09-02 |
CA2537143C CA2537143C (en) | 2010-06-22 |
Family
ID=36141792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2537143A Expired - Lifetime CA2537143C (en) | 1998-02-27 | 1999-02-23 | Method and system for quality-based power control in cellular communications systems |
Country Status (1)
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CA (1) | CA2537143C (en) |
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1999
- 1999-02-23 CA CA2537143A patent/CA2537143C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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CA2537143C (en) | 2010-06-22 |
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Legal Events
Date | Code | Title | Description |
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EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20190225 |