Patent US4819545A successfully refreshed from Google Patents.
Patent US6654613B1 successfully refreshed from Google Patents.
US6654613B1
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US
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Device and method of continuous outer-loop power control in DTX mode for CDMA mobile communication system
Assignee: Samsung Electronics Co Ltd
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Filing: 2000-02-14
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Granted: 2003-11-25
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Expires: 2020-02-14
Abstract
Abstract A device and method for outer-loop power control in a discontinuous transmission mode in a CDMA mobile communication system. In an outer-loop power control method for a non-frame data transmission period of a dedicated control channel (DCCH) which transmits frame data discontinuously, the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station is measured for the frame period, and it is determined whether the frame has errors based on the measured SNR. A closed-loop power control threshold is increased if a frame error exists and decreased if no frame errors exist.
Inventors
- 👤 Seung-Joo Maeng
- 👤 Jae-Heung Yeom
- 👤 Jae-Min Ahn
- 👤 Young Ky Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:55
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/06; H04W52/12; H04W52/20; H04W52/08; H04W52/24; H04W52/38; H04W52/44; H04W52/54; H04W52/56; H04W52/58; H04W52/60
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
78 words
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of: measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
Claim 2
Dependent Claim
78 words
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of: measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
Claim 3
Dependent Claim
36 words
The method recited in claim 1 , wherein the SNR measuring step comprises the steps of: calculating a SNR of the PCBs; and obtaining a final SNR by adding an error-compensating offset value to the SNR.
Claim 4
Dependent Claim
63 words
The method recited in claim 2 , wherein the received frame error determination step comprises the steps of: detecting a frame error rate (FER) corresponding to the SNR of the PCBs from a look-up table including corresponding FERs for measured SNRs; generating a random coefficient; and determining whether frame errors have occurred based on a comparison between the random coefficient and the FER.
Claim 5
Dependent Claim
16 words
The method recited in claim 3 , wherein the random coefficient is between 0 and 1.
Claim 6
Dependent Claim
36 words
The method recited in claim 1 , wherein it is determined whether frame errors have occurred based on comparing the measured SNR with a preset threshold for a target FER in the frame error determination step.
Claim 7
Dependent Claim
77 words
The method recited in claim 1 , wherein the frame error determination step comprises the steps of: comparing the measured SNR with a first threshold; increasing a count number of measured SNRs which are smaller than the first threshold when the measured SNR is smaller than the first threshold; determining whether all SNRs are measured for one frame; and determining whether frame errors have occurred based on a comparison between the count value and a second threshold.
Claim 8
Dependent Claim
76 words
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of: measuring the SNR of a pilot channel signal received at a base station from a mobile station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
Claim 9
Dependent Claim
76 words
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of: measuring the SNR of a pilot channel signal received at a base station from a mobile station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
Claim 10
Dependent Claim
38 words
The method recited in claim 7 , wherein the SNR measuring step comprises the steps of: calculating a SNR of the pilot channel signal; and obtaining a final SNR by adding an error-compensating offset value to the SNR.
Claim 11
Dependent Claim
61 words
The method recited in claim 7 , wherein the frame error determination step comprises the steps of: detecting an FER corresponding to the SNR of the pilot channel signal from a look-up table including corresponding FERs for measured SNRs; generating a random coefficient; and determining whether frame errors have occurred based on a comparison between the random coefficient and the FER.
Claim 12
Dependent Claim
16 words
The method recited in claim 9 , wherein the random coefficient is between 0 and 1.
Claim 13
Dependent Claim
36 words
The method recited in claim 7 , wherein it is determined whether frame errors have occurred based on comparing the measured SNR with a preset threshold for a target FER in the frame error determination step.
Claim 14
Dependent Claim
77 words
The method recited in claim 7 , wherein the frame error determination step comprises the steps of: comparing the measured SNR with a first threshold; increasing a count number of measured SNRs which are smaller than the first threshold when the measured SNR is smaller than the first threshold; determining whether all SNRs are measured for one frame; and determining whether frame errors have occurred based on a comparison between the count value and a second threshold.
Claim 15
Dependent Claim
85 words
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising: A an SNR measurer for measuring a SNR of PCBs received at a mobile station from a base station for a non-frame data transmission period; a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination; and an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
Claim 16
Dependent Claim
85 words
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising: A an SNR measurer for measuring a SNR of PCBs received at a mobile station from a base station for a non-frame data transmission period; a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination; and an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
Claim 17
Dependent Claim
56 words
The device recited in claim 13 , wherein the frame error detector comprises: a look-up table storage for storing a look-up table having corresponding FERs for SNRs; and a frame error estimator for receiving the measured SNR, detecting a corresponding FER from the look-up table, and determining whether frame errors exist according to the corresponding FER.
Claim 18
Dependent Claim
28 words
The device recited in claim 14 , further comprising a random number generator for generating a random number and outputting the random number to the frame error estimator.
Claim 19
Dependent Claim
41 words
The device recited in claim 15 , wherein the frame error estimator receives the random number, compares the random number with the corresponding FER, and determines that frame errors have occurred when the random number is smaller than the corresponding FER.
Claim 20
Dependent Claim
50 words
The device recited in claim 13 , further comprising a switch for selecting one of the frame error indicator or a CRC error check result received from a CRC error detector, said selection depending on whether a frame error,is present, and outputting the selected one to the outer-loop power controller.
Claim 21
Dependent Claim
26 words
The device of claim 13 , wherein the frame error detector determines whether frame errors have occurred by comparing the measured SNR with a predetermined threshold.
Claim 22
Dependent Claim
39 words
The device of claim 13 , wherein the frame error detector counts measured SNRs smaller than a first threshold in frame units, and determines that frame errors have occurred if the count value is larger than a second threshold.
Claim 23
Dependent Claim
87 words
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising: an SNR measurer for measuring the SNR of a pilot channel signal received at a mobile station from a base station for a non-frame data transmission period; a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination; and an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
Claim 24
Dependent Claim
87 words
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising: an SNR measurer for measuring the SNR of a pilot channel signal received at a mobile station from a base station for a non-frame data transmission period; a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination; and an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
Claim 25
Dependent Claim
55 words
The device recited in claim 20 , wherein the frame error detector comprises: a look-up table storage for storing a look-up table having corresponding FERs for SNRs; and a frame error estimator for receiving the measured SNR, detecting a corresponding FER from the look-up table, and determining whether frame errors exist according to the FER.
Claim 26
Dependent Claim
28 words
The device recited in claim 21 , further comprising a random number generator for generating a random number and outputting the random number to the frame error estimator.
Claim 27
Dependent Claim
39 words
The device recited in claim 22 , wherein the frame error estimator receives the random number, compares the random number with the FER, and determines that frame errors have occurred when the random number is smaller than the FER.
Claim 28
Dependent Claim
51 words
The device recited in claim 20 , further comprising a switch for selecting one of the frame error indicator and a CRC error check result received from the CRC error detector, said selection depending on whether a frame error is present, and outputting the selected one to the outer-loop power controller.
Claim 29
Dependent Claim
70 words
An outer-loop power control method for a dedicated control channel (DCCH) which transmits frame data discontinuously, the method comprising the steps of: measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and controlling a closed-loop power control threshold based upon the determination.
Claim 30
Dependent Claim
70 words
An outer-loop power control method for a dedicated control channel (DCCH) which transmits frame data discontinuously, the method comprising the steps of: measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period; determining whether a received frame has errors based on the measured SNR; and controlling a closed-loop power control threshold based upon the determination.
Claim 31
Dependent Claim
20 words
The method as recited in claim 25 , wherein the closed-loop power control is increased when a frame error exists.
Claim 32
Dependent Claim
20 words
The method as recited in claim 25 , wherein the closed-loop power control is decreased when no frame error exists.
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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) | 2006-11-24 | 2007-05-26 | 2007-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-24 | 2011-05-26 | 2011-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-24 | 2015-05-26 | 2015-11-25 | $7700.00 | Window Closed / Lapsed |