Multi-cell signals in OFDM wireless networks
First Claim
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1. A method for use in a wireless device, the method comprising:
- receiving, from a first base station, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station;
measuring, based on the CSI measurement resources, CSI for the subset of cells;
quantizing the measured CSI jointly across cells of the subset of cells;
transmitting, to the first base station, the jointly quantized CSI;
receiving, from the first base station, at least one resource assignment for at least one packet; and
receiving signals simultaneously via the first cell associated with the first base station and the at least one second cell associated with the at least one other base station, wherein the signals correspond to the at least one packet.
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Abstract
A wireless device receives messages indicating CSI measurement resources of cells belonging to at least two base stations or belonging to at least two sectors of a base station. The wireless device measures CSI employing at least CSI measurement resources of the cells. The wireless device quantizes the measured CSI jointly across cells and encodes and transmits the jointly quantized CSI. The wireless device receives a resource assignment for data packet(s). The wireless device receives signals carrying the data packets from multiple cells.
256 Citations
36 Claims
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1. A method for use in a wireless device, the method comprising:
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receiving, from a first base station, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station; measuring, based on the CSI measurement resources, CSI for the subset of cells; quantizing the measured CSI jointly across cells of the subset of cells; transmitting, to the first base station, the jointly quantized CSI; receiving, from the first base station, at least one resource assignment for at least one packet; and receiving signals simultaneously via the first cell associated with the first base station and the at least one second cell associated with the at least one other base station, wherein the signals correspond to the at least one packet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for use in a first base station, the method comprising:
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transmitting, to a wireless device, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station; receiving and decoding jointly quantized CSI, wherein CSI is measured based on the CSI measurement resources for the subset of cells, and the measured CSI is quantized jointly across cells of the subset of cells to generate the jointly quantized CSI; transmitting, to the wireless device, at least one resource assignment for at least one packet; and transmitting, via the first cell associated with the first base station, first signals to the wireless device, wherein the first signals correspond to the at least one packet, and wherein second signals corresponding to the at least one packet are transmitted via the at least one second cell associated with the at least one other base station. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wireless device comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to; receive, from a first base station, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station; measure, based on the CSI measurement resources, CSI for the subset of cells; quantize the measured CSI jointly across cells of the subset of cells; transmit, to the first base station, the jointly quantized CSI; receive, from the first base station, at least one resource assignment for at least one packet; and receive signals simultaneously via the first cell associated with the first base station and the at least one second cell associated with the at least one other base station, wherein the signals correspond to the at least one packet. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A first 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 first base station to; transmit, to a wireless device, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station; receive and decode jointly quantized CSI, wherein CSI is measured based on the CSI measurement resources for the subset of cells, and the measured CSI is quantized jointly across cells of the subset of cells to generate the jointly quantized CSI; transmit, to the wireless device, at least one resource assignment for at least one packet; and transmit, via the first cell associated with the first base station, first signals to the wireless device, wherein the signals correspond to the at least one packet, and wherein second signals corresponding to the at least one packet are transmitted via the at least one second cell associated with the at least one other base station. - View Dependent Claims (24, 25, 26, 27, 28, 36)
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29. A system comprising:
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a first base station configured to; transmit, to a wireless device, at least one message indicating channel state information (CSI) measurement resources for each cell of a subset of cells, wherein the subset of cells comprises a first cell associated with the first base station and at least one second cell associated with at least one other base station; receive and decode jointly quantized CSI; transmit, to the wireless device, at least one resource assignment for at least one packet; and transmit, via the first cell, first signals to the wireless device, wherein the first signals correspond to the at least one packet; a second base station, of the at least one other base station, configured to; transmit, via the at least one second cell, second signals to the wireless device, wherein the second signals correspond to the at least one packet; and the wireless device, configured to; measure, based on the CSI measurement resources, CSI for the subset of cells; quantize the measured CSI jointly across cells of the subset of cells; transmit, to the first base station, the jointly quantized CSI; and receive the first signals and the second signals simultaneously via the first cell associated with the first base station and the at least one second cell associated with the at least one other base station. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification