US 10,257,790 B2 · Terminal, base station, and communication method

Abstract

Provided is a terminal with which it is possible, in a heterogeneous cell network, to transmit a Periodic-Sounding Reference Signal (P-SRS) at a transmission bandwidth and power density necessary for carrying out both a process of selection of a transceiving participating base station and a process of frequency scheduling of a Physical Uplink Shared Channel (PUSCH). A terminal (300) comprises a receiving unit (301) which receives control information which includes information which denotes a P-SRS transmission parameter, and a transmission unit (303) which, using a transmission parameter which is included in the received control information, transmits a first P-SRS provided with a first bandwidth and a first power density at a first period, and transmits a second P-SRS provided with a second bandwidth which is narrower than the first bandwidth and second power density which is higher than the first power density at a second period.

Claims12

Dependent claims

A communication terminal apparatus comprising:

a memory that stores instructions;
a processor that, when executing the instructions stored in the memory, performs operations comprising:
in response to receiving one or more first transmission power control commands (TPC commands) in a first time period in a Physical Downlink Control Channel (PDCCH), controlling a first transmission power value of a first aperiodic sounding reference signal (A-SRS) using the first TPC commands;
in response to receiving one or more second TPC commands in a second time period in the PDCCH, wherein the second time period is other than the first time period and follows the first time period and the first and second time periods have different time lengths, controlling a second transmission power value of a second A-SRS using the second TPC commands;
and
transmitting the first A-SRS at the controlled first transmission power value, and in response to a request for the second A-SRS, transmitting the second A-SRS at the controlled second transmission power value.

3 more elements

An integrated circuit that controls a process performed at a communication terminal apparatus, the integrated circuit comprising:

at least one input,
circuitry coupled to the at least one input, wherein the circuitry:
in response to receiving one or more first transmission power control commands (TPC commands) in a first time period in a Physical Downlink Control Channel (PDCCH), controls a first transmission power value of a first aperiodic sounding reference signal (A-SRS) using the first TPC commands;
and
in response to receiving one or more second TPC commands in a second time period in the PDCCH, wherein the second time period is other than the first time period and follows the first time period and the first and second time periods have different time lengths, controls a second transmission power value of a second A-SRS using the second TPC commands, and
at least one output coupled to the circuitry, wherein the at least one output, in operation, outputs the first A-SRS at the controlled first transmission power value in response to a request for the first A-SRS, and outputs the second A-SRS at the controlled second transmission power value in response to a request for the second A-SRS.

3 more elements

Dependencies are inferred from the claim text.

Terminal, base station, and communication method

Life of this patent

Terminal, base station, and communication method

Life of this patent

Abstract

Claims12