Control for uplink in MIMO communication system
AssigneeQUALCOMM Incorporated
InventorsXiliang Luo, Wanshi Chen, Juan Montojo
Life of this patent
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Abstract
In a wireless communication network that performs Multiple Input Multiple Output (MIMO) communication, uplink power control signals are provided to a user equipment (UE) via a base station signaled power allocation scheme responsive to a determination of whether or not the uplink transmission is in a interference limited condition relative to a neighboring cell.
Claims36
A method for wireless communication, comprising:
- determining whether uplink transmission from a user equipment (UE) is in an interference limited condition;
- instructing the UE to compensate for antenna gain imbalance (AGI) between multiple antennas of the UE, in response to determining that the uplink transmission is in the interference limited condition;
- and
- instructing the UE to perform total power control for the multiple antennas, in response to determining that the uplink transmission is not in the interference limited condition.
A computer-readable storage medium holding coded instructions for causing a computer to:
- instruct a user equipment (UE) in a wireless communication network to compensate for antenna gain imbalance (AGI) between multiple antennas of the UE, in response to a determination that uplink transmission from the UE is in an interference limited condition;
- and
- instruct the UE to perform total power control for the multiple antennas, in response to a determination that uplink transmission from the UE is not in the interference limited condition.
An apparatus for wireless communication, comprising:
- means for instructing a user equipment (UE) to compensate for antenna gain imbalance (AGI) between multiple antennas of the UE, in response to a determination that uplink transmission from the UE is in an interference limited condition;
- and
- means for instructing the UE to perform total power control for the multiple antennas, in response to a determination that uplink transmission from the UE is not in the interference limited condition.
An apparatus for wireless communication, comprising:
- a memory holding instructions for providing a signal instructing a user equipment (UE) to compensate for antenna gain imbalance (AGI) between multiple antennas of the UE, in response to a determination that uplink transmission from the UE is in an interference limited condition, and for providing a signal instructing the UE to perform total power control for the multiple antennas, in response to a determination that uplink transmission from the UE is not in the interference limited condition;
- and
- a processor that executes the instructions.
A method for wireless communication, comprising:
- providing control parameters for uplink transmission from multiple antennas of a user equipment (UE) in a wireless communication network;
- receiving a report from the UE characterizing total power headroom and antenna gain imbalance (AGI) for the multiple antennas;
- determining a power allocation scheme, a transmission rank and a precoding matrix in response to the report;
- and
- transmitting the power allocation scheme, the transmission rank and the precoding matrix to the UE for use for uplink transmission.
An apparatus for wireless communication, comprising:
- means for receiving a report for total power headroom and received Antenna Gain Imbalance (AGI) as received at a user equipment (UE) in a wireless communication network;
- means for determining a power allocation scheme, a transmission rank, and precoding matrix for the transmission rank uplink in response to the report;
- and
- means for transmitting the power allocation scheme, the transmission rank and the precoding matrix to the UE for use for uplink transmission.
Dependencies are inferred from the claim text.