Reporting of timing information to support downlink data transmission

An apparatus for wireless communication at a UE, comprising:

• means for receiving signals from a plurality of cells available for coordinated multipoint (COMP) data transmissions, each of the plurality of cells associated with a separate base station;
• means for determining timing information for the plurality of cells based on the received signals, the timing information comprising a receive time of each of the signals received from each of the plurality of cells, wherein the receive time of each of the signals received from each of the plurality of cells is within a timing window at the UE;
• means for determining the receive time of each of the signals received from each of the plurality of cells based on a first arriving path, or a strongest path, or a center of mass of a channel impulse response for a cell of the plurality of cells, wherein determining the timing information is based on the receive time of each of the signals received from each of the plurality of cells;
• means for sending the timing information for the plurality of cells;
• and
• means for receiving a CoMP data transmission from a portion of the plurality of cells available for CoMP data transmissions to the UE, the portion selected to participate in the CoMP data transmission based on the timing information for each of the plurality of cells, wherein the CoMP data transmission is coordinated based on the receive time of each of the signals received from each of the selected cells.

An apparatus for wireless communication at a UE, comprising:

• at least one processor configured to:
• receive signals from a plurality of cells available for coordinated multipoint (COMP) data transmissions, each of the plurality of cells associated with a separate base station;
• determine timing information for the plurality of cells based on the received signals, the timing information comprising a receive time of each of the signals received from each of the plurality of cells, wherein the receive time of each of the signals received from each of the plurality of cells is within a timing window at the UE;
• determine the receive time of each of the signals received from each of the plurality of cells based on a first arriving path, or a strongest path, or a center of mass of a channel impulse response for a cell of the plurality of cells, wherein the timing information is determined based on the receive time of each of the signals received from each of the plurality of cells;
• send the timing information for the plurality of cells;
• and
• receive a CoMP data transmission from a portion of the plurality of cells available for CoMP data transmissions to the UE, the portion selected to participate in the CoMP data transmission based on the timing information for each of the plurality of cells, wherein the CoMP data transmission is coordinated based on the receive time of each of the signals received from each of the selected cells.

A computer program product, comprising:

• a non-transitory computer-readable medium comprising:
• code for causing at least one computer to receive signals from a plurality of cells available for coordinated multipoint (CoMP) data transmissions to a user equipment (UE), each of the plurality of cells associated with a separate base station;
• code for causing the at least one computer to determine timing information for the plurality of cells based on the received signals, the timing information comprising a receive time of each of the signals received from each of the plurality of cells, wherein the receive time of each of the signals received from each of the plurality of cells is within a timing window at the UE;
• code for causing the at least one computer to determine the receive time of each of the signals received from each of the plurality of cells based on a first arriving path, or a strongest path, or a center of mass of a channel impulse response for a cell of the plurality of cells, wherein the timing information is determined based on the receive time of each of the signals received from each of the plurality of cells;
• code for causing the at least one computer to report the timing information for the plurality of cells by the UE;
• and
• code for causing the at least one computer to receive a CoMP data transmission from a portion of the plurality of cells available for CoMP data transmissions to the UE, the portion selected to participate in the CoMP data transmission based on the timing information for each of the plurality of cells, wherein the CoMP data transmission is coordinated based on the receive time of each of the signals received from each of the selected cells.

A method for wireless communication, comprising:

• receiving timing information for a plurality of cells from a user equipment (UE), each of the plurality of cells available for coordinated multipoint (CoMP) data transmission to the UE and being associated with a separate base station, the timing information comprising a receive time of each signal received by the UE from each of the plurality of cells, wherein the receive time of each of the signals received by the UE from each of the plurality of cells is within a timing window at the UE, wherein the receive time of each of the signals received by the UE from the plurality of cells is based on a first arriving path, or a strongest path, or a center of mass of a channel impulse for a cell of the plurality of cells, and wherein the timing information is based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• selecting a portion of the plurality of cells available for CoMP data transmissions to the UE based on the timing information for each of the plurality of cells;
• determining a CoMP data transmission, the CoMP data transmission coordinated based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• and
• coordinating with the portion of the plurality of cells to transmit the CoMP data transmission to the UE from the portion of the plurality of cells.

An apparatus for wireless communication, comprising:

• means for receiving timing information for a plurality of cells from a user equipment (UE), each of the plurality of cells available for coordinated multipoint (CoMP) data transmission to the UE and being associated with a separate base station, the timing information comprising a receive time of each signal received by the UE from each of the plurality of cells, wherein the receive time for each of the plurality of cells is within a timing window at the UE, wherein the receive time of each of the signals received by the UE from the plurality of cells is based on a first arriving path, or a strongest path, or a center of mass of a channel impulse for a cell of the plurality of cells, and wherein the timing information is based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• means for selecting a portion of the plurality of cells available for CoMP data transmission to the UE based on the timing information for each of the plurality of cells;
• means for determining a CoMP data transmission, the CoMP data transmission coordinated based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• and
• means for coordinating with the portion of the plurality of cells to transmit the CoMP data transmission to the UE from the portion of the plurality of cells.

An apparatus for wireless communication, comprising:

• at least one processor configured to:
• receive timing information for a plurality of cells from a user equipment (UE), each of the plurality of cells available for coordinated multipoint (COMP) data transmission to the UE and being associated with a separate base station, the timing information comprising a receive time of each signal received by the UE from each of the plurality of cells, wherein the receive time of each of the signals received by the UE from each of the plurality of cells is within a timing window at the UE, wherein the receive time of each of the signals received by the UE from the plurality of cells is based on a first arriving path, or a strongest path, or a center of mass of a channel impulse for a cell of the plurality of cells, and wherein the timing information is based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• select a portion of the plurality of cells available for CoMP data transmission to the UE based on the timing information for each of the plurality of cells;
• determine a CoMP data transmission, the CoMP data transmission coordinated based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• and
• coordinate with the portion of the plurality of cells to transmit the CoMP data transmission to the UE from the portion of the plurality of cells.

A computer program product, comprising:

• a non-transitory computer-readable medium comprising:
• code for causing at least one computer to receive timing information for a plurality of cells from a user equipment (UE), each of the plurality of cells available for coordinated multipoint (COMP) data transmission to the UE and being associated with a separate base station, the timing information comprising a receive time of each signal received by the UE from each of the plurality of cells, wherein the receive time of each of the signals received by the UE from each of the plurality of cells is within a timing window at the UE, wherein the receive time of each of the signals received by the UE from the plurality of cells is based on a first arriving path, or a strongest path, or a center of mass of a channel impulse for a cell of the plurality of cells, and wherein the timing information is based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• code for causing the at least one computer to select a portion of the plurality of cells available for CoMP data transmissions to the UE based on the timing information for each of the plurality of cells;
• code for causing the at least one computer to determine a CoMP data transmission, the CoMP data transmission coordinated based on the receive time of each of the signals received by the UE from each of the plurality of cells;
• and
• code for causing the at least one computer to coordinate with the portion of the plurality of cells to transmit the CoMP data transmission to the UE from the portion of the plurality of cells.