US Patent No. 9,326,286

ALMOST BLANK SUBFRAME ALLOCATION


Patent No. 9,326,286
Issue Date April 26, 2016
Title Almost Blank Subframe Allocation
Inventorship Esmael Hejazi Dinan, Herndon, VA (US)
Assignee Ofinno Technologies, LLC, Herndon, VA (US)

Claim of US Patent No. 9,326,286

1. A method comprising:
a) providing, by a first base station, an overlapping coverage area with each of a plurality of second base stations;
b) transmitting, by said first base station, a first message comprising:
i) a first subframe allocation repetition period;
ii) a first subframe allocation offset; and
iii) a first subframe allocation bitmap indicating a first plurality of subframes, said first plurality of subframes comprising
a first plurality of Almost Blank Subframes; and

c) transmitting, by each of said plurality of second base stations, a second message comprising:
i) said first subframe allocation repetition period;
ii) said first subframe allocation offset; and
iii) a second subframe allocation bitmap indicating a second plurality of subframes, said second plurality of subframes comprising
a second plurality of Almost Blank Subframes different from said first plurality of Almost Blank Subframes; and

wherein:
i) base stations in said plurality of second base stations configure the same set of subframes as said second plurality of
Almost Blank Subframes;

ii) said first plurality of Almost Blank Subframes and said second plurality of Almost Blank Subframes do not substantially
overlap in time; and

iii) during a majority of symbols of an Almost Blank Subframe of a base station, signals are transmitted at an Almost Blank
Subframe power level that is substantially lower than a transmit power during a non-Almost Blank Subframe.