Almost blank subframe in carrier aggregation
First Claim
Patent Images
1. A base station comprising:
- one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to;
transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of second, fourth, seventh, and ninth subframes of each radio frame in a plurality of radio frames;
transmit, to a wireless device, a second message comprising;
a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and
a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and
transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe.
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Abstract
Methods, apparatus, and systems are described relating to wireless communications. A base station may transmit a message comprising a subframe allocation bitmap indicating a plurality of subframes. The indicated subframes may correspond to Almost Blank Subframes transmitted by the base station. The base station may transmit a message to a wireless device indicating measurement subframe allocation bitmaps. A first measurement subframe allocation bitmap may exclude the plurality of subframes. A second measurement subframe allocation bitmap may exclude subframes of the first measurement subframe allocation bitmap. These and other features are described.
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Citations
40 Claims
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1. A base station comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of second, fourth, seventh, and ninth subframes of each radio frame in a plurality of radio frames; transmit, to a wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe. - View Dependent Claims (2, 3, 4)
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5. A base station comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of third and eighth subframes of each radio frame in a plurality of radio frames; transmit, to a wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe. - View Dependent Claims (6, 7, 8)
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9. A base station comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of second, fourth, and eighth subframes of each radio frame in a plurality of radio frames; transmit, to a wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A base station comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of third, seventh, and ninth subframes of each radio frame in a plurality of radio frames; transmit, to a wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A system comprising:
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a base station and a wireless device, wherein the base station is configured to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of second, fourth, seventh, and ninth subframes of each radio frame in a plurality of radio frames; transmit, to the wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe; and wherein the wireless device is configured to; receive the second message; and report, to the base station, channel state information based on the second message. - View Dependent Claims (22, 23, 24)
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25. A system comprising:
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a base station and a wireless device, wherein the base station is configured to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of third and eighth subframes of each radio frame in a plurality of radio frames; transmit, to the wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe; and wherein the wireless device is configured to; receive the second message; and report, to the base station, channel state information based on the second message. - View Dependent Claims (26, 27, 28)
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29. A system comprising:
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a base station and a wireless device, wherein the base station is configured to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of second, fourth, and eighth subframes of each radio frame in a plurality of radio frames; transmit, to the wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe; and wherein the wireless device is configured to; receive the second message; and report, to the base station, channel state information based on the second message. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A system comprising:
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a base station and a wireless device, wherein the base station is configured to; transmit a first message comprising a subframe allocation bitmap indicating a plurality of Almost Blank Subframes, wherein the plurality of Almost Blank Subframes consists of third, seventh, and ninth subframes of each radio frame in a plurality of radio frames; transmit, to the wireless device, a second message comprising; a first measurement subframe allocation bitmap indicating a first plurality of measurement subframes of a primary carrier, wherein the first plurality of measurement subframes excludes the plurality of Almost Blank Subframes; and a second measurement subframe allocation bitmap indicating a second plurality of measurement subframes of the primary carrier, wherein the second plurality of measurement subframes excludes the first plurality of measurement subframes; and transmit a first Almost Blank Subframe, wherein the first Almost Blank Subframe is transmitted at a power level that is lower than during a non-Almost Blank Subframe; and wherein the wireless device is configured to; receive the second message; and report, to the base station, channel state information based on the second message. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification