Almost blank subframe in carrier aggregation
First Claim
Patent Images
1. A method comprising:
- transmitting, by a base station, a message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, the plurality of Almost Blank Subframes consisting of third and eighth subframes of every radio frame in a plurality of radio frames; and
transmitting to a wireless device a unicast message comprising;
a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, the first plurality of measurement subframes excluding the plurality of Almost Blank Subframes; and
a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, the second plurality of measurement subframes excluding the first plurality of measurement subframes; and
wherein during a majority of symbols of an Almost Blank Subframe;
signals are transmitted at an Almost Blank Subframe power level that is lower than a transmit power during a non-Almost Blank Subframe.
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Abstract
A base station transmits a message to a plurality of wireless devices in connected mode. The message comprises a subframe allocation bitmap indicating a plurality of subframes. The plurality of subframes comprises a plurality of almost blank subframes. During majority of symbols of an almost blank subframe of a base station, signals are transmitted at an almost blank subframe power level that is different from a transmit power during a non-almost blank subframe.
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Citations
20 Claims
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1. A method comprising:
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transmitting, by a base station, a message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, the plurality of Almost Blank Subframes consisting of third and eighth subframes of every radio frame in a plurality of radio frames; and transmitting to a wireless device a unicast message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, the first plurality of measurement subframes excluding the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, the second plurality of measurement subframes excluding the first plurality of measurement subframes; and wherein during a majority of symbols of an Almost Blank Subframe;
signals are transmitted at an Almost Blank Subframe power level that is lower than a transmit power during a non-Almost Blank Subframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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transmitting, by a base station, a message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, the plurality of Almost Blank Subframes consisting of third, seventh, and ninth subframes of every radio frame in a plurality of radio frames; and transmitting to a wireless device a unicast message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, the first plurality of measurement subframes excluding the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, the second plurality of measurement subframes excluding the first plurality of measurement subframes; and wherein during a majority of symbols of an Almost Blank Subframe;
signals are transmitted at an Almost Blank Subframe power level that is lower than a transmit power during a non-Almost Blank Subframe. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method comprising:
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transmitting, by a base station, a message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, the plurality of Almost Blank Subframes consisting of second, fourth and eighth subframes of every radio frame in a plurality of radio frames; and transmitting to a wireless device a unicast message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, the first plurality of measurement subframes excluding the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, the second plurality of measurement subframes excluding the first plurality of measurement subframes; and wherein during a majority of symbols of an Almost Blank Subframe;
signals are transmitted at an Almost Blank Subframe power level that is lower than a transmit power during a non-Almost Blank Subframe. - View Dependent Claims (17, 18, 19, 20)
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Specification