United States Patent 7,873,328
Ozluturk , et al. January 18, 2011
--------------------------------------------------------------------------------
Subscriber unit for performing an access procedure
Abstract
A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
--------------------------------------------------------------------------------
Inventors: Ozluturk; Fatih M. (Port Washington, NY), Lomp; Gary R. (Centerport, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/116,262
Filed: May 7, 2008
--------------------------------------------------------------------------------
Related U.S. Patent Documents
--------------------------------------------------------------------------------
Application Number Filing Date Patent Number Issue Date
11169488 Jun., 2005
10866651 Oct., 2006 7117004
10400343 Jan., 2005 6839567
10086320 May., 2003 6571105
09721034 Dec., 2002 6493563
09003104 Jan., 2001 6181949
08670162 Nov., 1998 5841768
--------------------------------------------------------------------------------
Current U.S. Class: 455/69 ; 370/335; 370/342; 375/145; 375/146; 455/226.1; 455/522; 455/67.11
Current International Class: H04B 7/216 (20060101); H04B 7/00 (20060101); H04B 1/00 (20060101)
Field of Search: 455/522,69,67.11-67.16,226.1-226.4 370/335,342,441,310,330,336-337,345,347,350,311,474 375/145-147,140,354-356,365
PPP
"Intellectuals solve problems; geniuses prevent them." - Albert Einstein
