United States Patent 7,660,600
Koo , et al. February 9, 2010
Adjustment of target signal-to-interference in outer loop power control for wireless communication systems
Abstract
A method for outer loop power control which compensates for changing channel conditions. A target metric, preferably target signal-to-interference ratio (SIR), is adjusted with differing step up and step down levels to converge on a relatively low steady state level of step up and step down target metric adjustments. The initial target SIR remains fixed during an inner loop settling state, followed by incremental target SIR adjustments during a transient state, and smaller incremental target SIR adjustments in a steady state. Step sizes of the adjustments are preferably based on the target block error rate (BLER) and the number of errors detected within predetermined time intervals.
Inventors: Koo; Chang-Soo (Melville, NY), Dennean; Charles (Melville, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/728,690
Filed: March 26, 2007
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
11023858 Dec., 2004 7197327
60551872 Mar., 2004
Current U.S. Class: 455/522 ; 455/115.1; 455/127.1; 455/69
Current International Class: H04B 7/00 (20060101)
Field of Search: 455/522,69,115.1,506,453,452.2,505,127.1,67.11,126,63.11,63.13,423 370/318,329,252,392
