Method and apparatus for power control in a communication system

• US 7,069,035 B2
• Filed: 03/30/2001
• Issued: 06/27/2006
• Est. Priority Date: 03/30/2001
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, Tao, Chaponniere, Etienne F.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/823,011
• Publication Number:
  US 20020142791A1
• Time in Patent Office: 1,915 Days
• Field of Search: 455/522, 455/13.4, 455/67.11, 455/67.13, 455/68, 455/69, 455/70, 455/71, 455/92, 455/115.1, 455/127.1, 455/127.2, 370/441, 370/500, 370/282, 370/331, 370/320, 370/318, 370/326, 370/327, 370/332, 370/335, 370/345, 370/342, 370/252
• US Class Current: 455/522
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]

Abstract

In a communication system (100), a method and apparatus provide for efficient power control between base station (101) and mobile stations (102-104). A controller is configured for determining duty cycle of a communication channel, and for controlling power level of the communication channel based on the determined duty cycle. The controller may compare the determined duty cycle against a duty cycle threshold. An adjustment for controlling power level may be based on the comparison.

Claims

1. In a communication system, a method comprising:

determining traffic to pilot channel power ratio of a traffic channel for communication between a mobile station and a base station in said communication system, wherein said traffic to pilot channel power ratio is determined based on communications of said traffic channel;

determining duty cycle of data frame transmissions of a dedicated control channel associated with said traffic channel, wherein said dedicated control channel is for maintaining communications of said traffic channel, wherein said duty cycle of data frame transmissions is based on the possible number of frame transmissions over a period of time;

adjusting said traffic to pilot channel power ratio based on said determined duty cycle;

communicating said traffic channel in accordance with said determined traffic to pilot channel power ratio, and said dedicated control channel in accordance with said adjusted traffic to pilot channel power ratio.