Almost blank subframe allocation
First Claim
Patent Images
1. A method for use in a wireless network comprising a plurality of base station, the method comprising:
- a) providing, by a first base station in the plurality of base stations, an overlapping coverage area with each of a plurality of second base stations;
b) transmitting, by the 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, the first plurality of subframes comprising a first plurality of Almost Blank Subframes; and
c) transmitting, by each of the plurality of second base stations in the plurality of base stations, a second message comprising;
i) the first subframe allocation repetition period;
ii) the first subframe allocation offset; and
iii) a second subframe allocation bitmap indicating a second plurality of subframes, the second plurality of subframes comprising a second plurality of Almost Blank Subframes different from the first plurality of Almost Blank Subframes; and
wherein;
i) base stations in the plurality of second base stations configure the same set of subframes as the second plurality of Almost Blank Subframes;
ii) the first plurality of Almost Blank Subframes and the 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.
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Accused Products
Abstract
A first base station provides overlapping coverage area with each of a plurality of second base stations. Each of the plurality of second base stations transmits a message comprising a subframe allocation bitmap indicating a plurality of subframes. The plurality of subframes comprises a plurality of almost blank subframes. Base stations in the plurality of second base stations configure the same set of subframes as the plurality of almost blank subframes.
23 Citations
18 Claims
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1. A method for use in a wireless network comprising a plurality of base station, the method comprising:
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a) providing, by a first base station in the plurality of base stations, an overlapping coverage area with each of a plurality of second base stations; b) transmitting, by the 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, the first plurality of subframes comprising a first plurality of Almost Blank Subframes; and c) transmitting, by each of the plurality of second base stations in the plurality of base stations, a second message comprising; i) the first subframe allocation repetition period; ii) the first subframe allocation offset; and iii) a second subframe allocation bitmap indicating a second plurality of subframes, the second plurality of subframes comprising a second plurality of Almost Blank Subframes different from the first plurality of Almost Blank Subframes; and wherein; i) base stations in the plurality of second base stations configure the same set of subframes as the second plurality of Almost Blank Subframes; ii) the first plurality of Almost Blank Subframes and the 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. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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a) providing, by a first base station, an overlapping coverage area with each of a plurality of second base stations; b) transmitting, by the 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, the first plurality of subframes comprising a first plurality of Almost Blank Subframes; and c) transmitting, by each of the plurality of second base stations, a second message comprising; i) the first subframe allocation repetition period; ii) the first subframe allocation offset; and iii) a second subframe allocation bitmap indicating a second plurality of subframes, the second plurality of subframes comprising a second plurality of Almost Blank Subframes different from the first plurality of Almost Blank Subframes; and wherein; i) base stations in the plurality of second base stations configure the same set of subframes as the second plurality of Almost Blank Subframes; ii) the first plurality of Almost Blank Subframes and the 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. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification