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:
Dec. 25, 2012
Filed:
Jan. 06, 2010
Applicant:
Ismail Guvenc, Santa Clara, CA (US);
Inventor:
Ismail Guvenc, Santa Clara, CA (US);
Assignee:
NTT DoCoMo, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 4/00 (2009.01); H04J 3/06 (2006.01); H04B 1/00 (2006.01); H04Q 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A femtocell network uses idle resource blocks of a data frame to reduce interference by spreading the resource blocks of the users over the available spectrum. Spreading may be achieved by repeating the transmission using a number of the resource block groups. As a result, (a) more robustness is obtained against interference; (b) transmission power levels may be decreased because of the spreading, resulting in reducing interference between nearby femtocells and between a macrocell and a femtocell. Other methods of spreading such a frequency or time slot hopping may also be used.