The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2011
Filed:
Dec. 13, 2005
Ana Lucia Iacono, Garden City, NY (US);
Arty Chandra, Manhasset Hills, NY (US);
Inhyok Cha, Yardley, PA (US);
John S. Chen, Downingtown, PA (US);
Yingxue LI, Exton, PA (US);
James C. Otto, Melbourne, FL (US);
Ana Lucia Iacono, Garden City, NY (US);
Arty Chandra, Manhasset Hills, NY (US);
Inhyok Cha, Yardley, PA (US);
John S. Chen, Downingtown, PA (US);
Yingxue Li, Exton, PA (US);
James C. Otto, Melbourne, FL (US);
InterDigital Technology Corporation, Wilmington, DE (US);
Abstract
An apparatus and a method for improving packet transmission and reducing latency in VoIP over WLAN using switched beam antennas having multiple directional antenna beams are disclosed. In an access point having a switched beam antenna, or other smart antenna system, the present invention extends the coverage area of an access point for authentication and association of a new WTRU, extends the access points coverage area during in session transmissions with a WTRU, and adjusts data rates. The method also controls Contention Period (CP)/Contention Free Period (CFP) timing amongst beams emanating from an access point having a switched beam antenna, or other smart antenna system. Fast diversity switching, frame level switching, lowered data rates, and scanning multiple directional antenna beams for the optimum transmission beam are disclosed to improve beam selection and packet transmission.