Power control during a transmission pause

• US 6,748,235 B1
• Filed: 12/19/2002
• Issued: 06/08/2004
• Est. Priority Date: 11/12/2002
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Ozluturk, Faith, Shin, Sung-Hyuk, Zeira, Ariela, Grieco, Donald M.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Orgad, Edan
• Application Number:
  US10/325,772
• Time in Patent Office: 537 Days
• Field of Search: 455/68, 455/69, 455/522, 455/504, 455/500, 455/432.1, 455/436, 455/442, 455/438, 455/439
• US Class Current: 455/522
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission

Abstract

A transmitting station performs closed loop power control prior to a transmission pause. A closed loop transmission power level prior to the pause is determined. A reference signal is received and a received power level of the reference signal prior to and during the transmission pause is determined. The measured reference signal received power levels are compared to a transmit power level of the reference signals to produce a pathloss estimate of the reference signal prior to and during the transmission pause. A new transmit power level is determined by adjusting the closed loop transmission power level by a change between the prior to and during pathloss estimates. A transmission power level of the transmitting station is set to the determined new transmit power level. A communication is transmitted at the set transmission power level.

Claims

1. A method for controlling transmission power levels of a transmitter station during a transmission pause, the method comprising:

performing closed loop power control prior to the transmission pause;

determining a closed loop transmission power level prior to the pause;

receiving a reference signal and measuring a received power level of the reference signal prior to and during the transmission pause;

comparing the measured reference signal received power levels to a transmit power level of the reference signals to produce a pathloss estimate of the reference signal prior to and during the transmission pause;

determining a new transmit power level by adjusting the closed loop transmission power level by a change between the prior to and during pathloss estimates;

setting a transmission power level of the transmitting station to the determined new transmit power level; and

transmitting a communication at the set transmission power level.

2. The method of claim 1 wherein the transmission pause is due to a pause in transmissions from the transmitting station.

3. The method of claim 1 wherein the transmission pause is due to a pause in transmissions from the receiving station.

4. The method of claim 1 wherein the new transmit power level is determined by adjusting the closed loop transmission power level by a change between the prior to and long term pathloss estimates.

5. The method of claim 1 wherein the new transmit power level is determined by adjusting the closed loop transmission power level by a change between the prior to and a weighted average of long term and during pathloss estimates.