Uplink power control using received reference signal

• US 8,116,803 B2
• Filed: 12/01/2008
• Issued: 02/14/2012
• Est. Priority Date: 05/14/2001
• Status: Expired due to Term

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Terry, Stephen E., Dick, Stephen G., Miller, James M., Zeira, Ariela, Zeira, Eldad M.
• Primary Examiner(s): Ghebretinsae, Temesgh
• Assistant Examiner(s): Safaipour, Bobbak
• Application Number:
  US12/325,597
• Publication Number:
  US 20090082059A1
• Time in Patent Office: 1,170 Days
• Field of Search: 455/63.1, 455/67.11, 455/67.13, 455/69, 455/450, 455/522, 455/561, 370/342, 370/347
• US Class Current: 455/522
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 52/146 Uplink 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 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/246 where the output power of a terminal is based on a path parameter calculated in said terminal
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for determining uplink power level, implemented in a base station, comprises receiving a communication signal over an uplink common control channel. The interference on the uplink common control channel in response to the received communication signal is measured and a channel quality of the uplink common control channel is monitored. A quality margin for the communication signal is provided and transmitted over a downlink control channel.

Claims

1. A method for determining uplink power level, implemented in a base station, comprising:

receiving a first communication signal over an uplink channel from a user equipment (UE);

measuring a channel quality of the uplink channel in response to the received first communication signal;

providing a quality margin derived from the first communication signal;

determining that the UE is to send an adaptive modulation and coding report to the base station;

transmitting an allocation of an uplink channel and the quality margin over a downlink control channel to the UE in response to the determining that the UE is to send an adaptive modulation and coding report; and

receiving a second communication from the UE in at least one time slot in the allocated uplink channel in response to the allocation of the uplink channel and the quality margin;

wherein the second communication includes an adaptive modulation and coding report and a transmission power level derived from the quality margin.

2. The method of claim 1, further comprising combining the measured interference and the quality margin.

3. The method of claim 2, further comprising encoding the measured interference and quality margin into a single parameter.

4. The method of claim 1, further comprising transmitting the measured interference over a broadcast channel.

5. A base station, comprising:

circuitry configured to receive a first communication signal over an uplink channel from a user equipment (UE);

circuitry configured to measure a channel quality of the uplink channel in response to the received first communication signal;

circuitry configured to provide a quality margin derived from the first communication signal;

circuitry configured to determine that the UE is to send an adaptive modulation and coding report to the base station; and

circuitry configured to transmit an allocation of an uplink channel and the quality margin over a downlink control channel to the UE in response to the determining that the UE is to send an adaptive modulation and coding report; and

wherein the circuitry configured to receive the first communication is further configured to receive a second communication from the UE in at least one time slot in the allocated uplink channel in response to the allocation of the uplink channel and the quality margin;

wherein the second communication includes an adaptive modulation and coding report and a transmission power level derived from the quality margin.