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.

Date of Patent:
Mar. 24, 2015

Filed:

Feb. 27, 2013
Applicant:

Hitachi, Ltd., Tokyo, JP;

Inventors:

Hitoshi Ishida, Yokohama, JP;

Kenzaburo Fujishima, Yokohama, JP;

Yunjian Jia, Jyukei-shi, CN;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 4/00 (2009.01); H04W 72/08 (2009.01); H04W 72/04 (2009.01); H04L 5/00 (2006.01);
U.S. Cl.
CPC ...
H04W 72/082 (2013.01); H04W 72/0426 (2013.01); H04W 72/08 (2013.01); H04L 5/0035 (2013.01);
Abstract

In an environment in which a macro base station and a low transmission power base station exist, the ratio of the interference reduction time period of the macro base station is optimized, and the throughput of the low transmission power base station is improved, while minimizing a reduction in throughput. The macro base station causes a high interference to other base stations and one or a plurality of low power nodes (LPN) subjected to interference from the macro base station. The macro base station sets first and second data transmission time periods and then determines the ratio of the second time period and the pattern of the first time period and the second time period based on communication quality in the first time period and communication quality in the second time period of the macro base station and the LPN.


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