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. 26, 2013
Filed:
Sep. 16, 2010
Gregory A. Breit, San Diego, CA (US);
Santosh Paul Abraham, San Diego, CA (US);
Sameer Vermani, San Diego, CA (US);
Hemanth Sampath, San Diego, CA (US);
Simone Merlin, San Diego, CA (US);
Didier Johannes Richard Van Nee, De Meern, NL;
Gregory A. Breit, San Diego, CA (US);
Santosh Paul Abraham, San Diego, CA (US);
Sameer Vermani, San Diego, CA (US);
Hemanth Sampath, San Diego, CA (US);
Simone Merlin, San Diego, CA (US);
Didier Johannes Richard Van Nee, De Meern, NL;
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods and apparatuses are proposed for supporting one or more user-dependent channel state information (CSI) feedback rates in a downlink spatial division multiple access (SDMA) system. For certain aspects, an access point (AP) may receive a channel evolution feedback from one or more stations and send a request for CSI to the stations whose CSI values need to be updated. For certain aspects, the AP may poll the stations for updated CSI values. For certain aspects, deterministic back-off timers may be assigned to the stations indicating when to send their CSI feedback. The proposed methods may improve system performance.