Almost blank subframe in carrier aggregation
First Claim
Patent Images
1. A method comprising:
- transmitting, by a base station, 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;
transmitting, 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
transmitting, by the base station, 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.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
32 Claims
-
1. A method comprising:
-
transmitting, by a base station, 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; transmitting, 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 transmitting, by the base station, 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, 5, 6, 7, 22, 23, 24)
-
-
8. A method comprising:
-
transmitting, by a base station, 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; transmitting, 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 transmitting, by the base station, 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 (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method comprising:
-
transmitting, by a base station, 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; transmitting, 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 transmitting, by the base station, 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 (17, 18, 19, 20, 21, 25)
-
-
26. A method comprising:
-
transmitting, by a base station, 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; transmitting, 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 transmitting, by the base station, 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 (27, 28, 29, 30, 31, 32)
-
Specification