Method and apparatus for transmission power control for a sounding reference signal

A user equipment (UE) for transmitting signals, the UE receiving signaling from at least one transmission point and transmitting signaling to at least one reception point, the UE comprising:

• a receiver configured to receive higher layer signaling from the at least one transmission point;
• and
• a transmitter configured to:
• transmit a first reference signal using a sequence determined from an identity of the at least one transmission point,
• transmit a second reference signal with a first transmission power having an offset with a first maximum value configured using first higher layer signaling received from the at least one transmission point,
• transmit a third reference signal using a sequence configured by second higher layer signaling received from the at least one transmission point, and
• transmit a fourth reference signal with a second transmission power having an offset with a second maximum value configured using third higher layer signaling received from the at least one transmission point,
• wherein the second maximum value is larger than the first maximum value.

A method for a user equipment (UE) to determine power for signal transmission, the method comprising:

• receiving information about a configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and information about a configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH);
• receiving at least one of a first downlink control information (DCI) format associated with power control of the SRS transmission or a second DCI format associated with power control of the PUSCH transmission;
• and
• performing a power control of the SRS transmission using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that the UE transmits the SRS;
• and
• performing the power control of the PUSCH transmission using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the PUSCH.

A user equipment (UE), comprising:

• a transceiver;
• and
• a processor configured to:
• receive, through the transceiver, information about a configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and information about a configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH),
• receive through the transceiver, a first downlink control information (DCI) format associated with power control of the SRS transmission or a second DCI format associated with power control of the PUSCH transmission,
• perform the power control of the SRS transmission using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that the UE transmits the SRS, and
• perform the power control of the PUSCH transmission using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the PUSCH.

A base station, comprising:

• a transceiver;
• and
• a processor configured to:
• transmit, through the transceiver, information about a configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and information about a configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH),
• transmit, through the transceiver, a first downlink control information (DCI) format associated with power control of the SRS or a second DCI format associated with power control of the PUSCH,
• receive, through the transceiver, the SRS by using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that a user equipment (UE) transmits the SRS, and
• receive, through the transceiver, the PUSCH by using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the PUSCH.

A method for a base station, the method comprising:

• transmitting information about a configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and information about a configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH);
• transmitting a first downlink control information (DCI) format associated with a power control of the SRS or a second DCI format associated with a power control of the PUSCH;
• receiving the SRS by using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that a user equipment (UE) transmits the SRS;
• and
• receiving the PUSCH by using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the PUSCH.