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:
Nov. 27, 2007
Filed:
Jul. 15, 2002
Ozgur Gurbuz, Santa Clara, CA (US);
David Pignatelli, Saratoga, CA (US);
David Stephenson, San Jose, CA (US);
Eldad Perahia, Sunnyvale, CA (US);
Bretton Douglas, Sunnyvale, CA (US);
Ender Ayanoglu, Santa Clara, CA (US);
Ozgur Gurbuz, Santa Clara, CA (US);
David Pignatelli, Saratoga, CA (US);
David Stephenson, San Jose, CA (US);
Eldad Perahia, Sunnyvale, CA (US);
Bretton Douglas, Sunnyvale, CA (US);
Ender Ayanoglu, Santa Clara, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
The MAC layer of a wireless communication standard is modified to facilitate MIMO (multiple input multiple output) processing and thereby increase capacity and/or spectral efficiency. In one implementation, the IEEE 802.11a standard is modified in this way. A contention free period (CFP) is divided between MIMO communications and non-MIMO communications. An access point may maintain a list of nodes operating in MIMO mode and nodes operating in non-MIMO mode.