Setting a transmission power level for a mobile unit

• US 7,697,643 B2
• Filed: 04/07/2004
• Issued: 04/13/2010
• Est. Priority Date: 01/04/1995
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Lomp, Gary R.
• Primary Examiner(s): Ahn; Sam K
• Application Number:
  US10/819,625
• Publication Number:
  US 20040190602A1
• Time in Patent Office: 2,197 Days
• Field of Search: 375/130, 375/345, 370/335, 370/342, 455/522, 455/135, 455/69
• US Class Current: 375/345
• CPC Class Codes: H03G 3/3042 in modulators, frequency-changers, transmitters or power amplifiers transmission power control in bidirectional transmission systems H04W52/04
• CPC Class Codes: H03G 3/3047 for intermittent signals, e.g. burst signals
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/709 Correlator structure
• CPC Class Codes: H04B 1/7093 Matched filter type
• CPC Class Codes: H04B 1/7115 Constructive combining of multi-path signals, i.e. RAKE receivers
• CPC Class Codes: H04B 1/712 Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
• CPC Class Codes: H04B 2201/70707 Efficiency-related aspects
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/0003 Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/22 taking into account previous information or commands
• CPC Class Codes: H04W 52/221 using past power control commands
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 : Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/52 : using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: H04W 52/54 : Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

A spread spectrum mobile station comprises at least one antenna configured to receive power commands. The power commands indicate that the mobile station should increase or decrease its transmit power. A decision device is configured to process the received power commands and produce a decision indicating whether each received power command indicates an increase or a decrease in the mobile station'"'"'s transmit power level. An accumulator is configured to accumulate a plurality of the decisions. An algorithm device is configured to receive the accumulated decisions and apply an algorithm to the accumulated decisions to set the mobile station'"'"'s transmit power level. The algorithm compares a plurality of the decisions to determine if the plurality of decisions match and the transmission power level is adjusted by a first amount if the decisions are determined to match and not adjusted by that first amount if the decisions are determined to not match.

Claims

1. A spread spectrum mobile station comprising:

an antenna configured to receive a plurality of power commands;

a decision device in communication with the antenna, the decision device being configured to produce a plurality of decisions, each of the plurality of decisions indicating whether a corresponding one of the received plurality of power commands indicates an increase or a decrease in a transmit power of the mobile station; and

an algorithm device configured to receive the plurality of decisions and apply an algorithm to the plurality of decisions to determine whether each of the plurality of decisions is the same,

wherein on a condition that each of the plurality of decisions is the same, the transmit power is adjusted by an amount, and on a condition that at least one of the plurality of decisions is not the same as another one of the plurality of decisions, the transmit power is not adjusted by the amount.

2. The mobile station of claim 1 further comprising a variable gain device configured to adjust the transmit power in response to the determination of the algorithm device.

3. The mobile station of claim 1 further comprising a despreader for despreading a received spread-spectrum channel, the received spread-spectrum channel carrying the plurality of power commands, the plurality of power commands being multiplexed in the received spread-spectrum channel, and a demultiplexer configured to demultiplex the plurality of power commands from the received despread spread-spectrum channel.

4. The mobile station of claim 1 wherein on a condition that each of the plurality of decisions is not the same, the transmit power is not adjusted.

5. A method for setting a transmission a transmission power level by a spread spectrum mobile station comprising:

receiving a plurality of power commands by a mobile station;

producing a plurality of decisions in response to the received plurality of power commands, each of the plurality of decisions indicating whether a corresponding one of the received plurality of power commands indicates an increase or a decrease in a transmit power of the mobile station; and

applying an algorithm to the plurality of decisions to determine whether each of the plurality of decisions is the same,

wherein the transmit power is adjusted by an amount on a condition that each of the plurality of decisions is the same and the transmission power level is not adjusted by the amount on a condition that each of the plurality of decisions is not the same as another one of the plurality of decisions.

6. The method of claim 5 wherein a variable gain device adjusts the transmit power in response to the determination that each of the plurality of decisions is the same.

7. The method of claim 5, further comprising:

receiving a spread-spectrum channel, the plurality of power commands being multiplexed in the spread-spectrum channel;

despreading the spread-spectrum channel; and

demultiplexing the plurality of power commands from the despread spread-spectrum channel.

8. The method of claim 5 wherein on a condition that the plurality of decisions are not the same, the transmit power is not adjusted.

9. A spread spectrum mobile station, comprising:

an antenna configured to receive a plurality of power commands;

a circuit coupled to the antenna, the circuit being configured to generate a plurality of decision values, each of the plurality of decision values indicating an increase or a decrease in a transmit power level of the mobile station, each of the plurality of decision values corresponding to a respective one of the plurality of power commands, and to compare each of the plurality of decision values, wherein on a condition that each of the plurality of decision values is the same, the transmit power level is adjusted by an amount, and on a condition that each of the plurality of decision values is not the same as another one of the plurality of decisions, the transmit power level is not adjusted by the amount.

10. The spread spectrum mobile station of claim 9 wherein the circuit is further configured to determine whether the transmit power level has been adjusted based on a sequence of the plurality of decisions.

11. The spread spectrum mobile station of claim 9 further comprising a variable gain device configured to adjust the transmit power level.

12. The mobile station of claim 9 further comprising a despreader for despreading a received spread-spectrum channel and a demultiplexer configured to demultiplex the received plurality of power commands.

13. A control method implemented by a spread spectrum mobile station, comprising:

receiving a plurality of power commands;

generating a plurality of decision values, each of the plurality of decision values indicating an increase or a decrease in a transmit power level of the mobile station, each of the plurality of decision values corresponding to a respective one of the plurality of power commands; and

comparing each of the plurality of decisions, wherein on a condition that each of the plurality of decision values is the same, the transmit power level is adjusted by an amount, and on a condition that each of the plurality of decisions is not the same as another one of the plurality of decisions, the transmit power level is not adjusted by the amount.

14. The method of claim 13 wherein a variable gain device adjusts the transmit power level.

15. The method of claim 13 further, wherein the plurality of power commands are multiplexed in a spread-spectrum channel, the method further comprising:

despreading the spread-spectrum channel; and

demultiplexing the plurality of power commands.