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US 12,526,105 B2Granted
Terminal and radio communication method
AssigneeNtt Docomo, Inc.
InventorsYuki Matsumura, Shohei Yoshioka, Hiroki Harada, Satoshi Nagata
Life of this patent
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Abstract
A terminal according to an aspect of the present disclosure includes: a receiving section that receives a first channel state information (CSI)-reference signal (RS) based on a sequence having a peak-to-average power ratio (PAPR) which is lower than a PAPR of a pseudo-random sequence; and a control section that performs measurement by using the first CSI-RS. It is possible to appropriately perform communication even in a case of utilizing a high frequency band.
Claims5
A terminal comprising:
- a receiver that receives higher layer signaling including a configuration of a first channel state information (CSI)-reference signal (RS) resource and a second CSI-RS resource;
- and
- a processor that performs a measurement on the first CSI-RS resource and the second CSI-RS resource based on the configuration,
- wherein the first CSI-RS resource is transmitted from a first transmission/reception point (TRP) and is associated with a plurality of first antenna ports, and the second CSI-RS resource is transmitted from a second TRP and is associated with a plurality of second antenna ports;
- the first CSI-RS resource and the second CSI-RS resource are transmitted at a same time and at a same frequency, the first CSI-RS resource and the second CSI-RS resource overlap in the same time, and the first CSI-RS resource and the second CSI-RS resource overlap in the same frequency,
- a transmission power of a CSI-RS in the first CSI-RS resource and the second CSI-RS resource is determined as a function of a ratio of a Physical Downlink Shared Channel (PDSCH) transmission power,
- each of the plurality of the first antenna ports and the plurality of the second antenna ports comprises a maximum of 32 antenna ports, and
- a first transmission configuration indicator (TCI) state of a first PDSCH associated with the first TRP indicates the first CSI-RS resource, and a second TCI state of a second PDSCH associated with the second TRP indicates the second CSI-RS resource, and wherein the plurality of the first antenna ports and the plurality of the second antenna ports do not associate with same QCL parameters.
5 more elements
A radio communication method for a terminal comprising:
- receiving higher layer signaling including a configuration of a first channel state information (CSI)-reference signal (RS) resource and a second CSI-RS resource;
- and
- performing a measurement on the first CSI-RS resource and the second CSI-RS resource based on the configuration,
- wherein the first CSI-RS resource is transmitted from a first transmission/reception point (TRP) and is associated with a plurality of first antenna ports, and the second CSI-RS resource is transmitted from a second TRP and is associated with a plurality of second antenna ports;
- the first CSI-RS resource and the second CSI-RS resource are transmitted at a same time and at a same frequency, the first CSI-RS resource and the second CSI-RS resource overlap in the same time, and the first CSI-RS resource and the second CSI-RS resource overlap in the same frequency,
- a transmission power of a CSI-RS in the first CSI-RS resource and the second CSI-RS resource is determined as a function of a ratio of a Physical Downlink Shared Channel (PDSCH) transmission power,
- each of the plurality of the first antenna ports and the plurality of the second antenna ports comprises a maximum of 32 antenna ports, and
- a first transmission configuration indicator (TCI) state of a first PDSCH associated with the first TRP indicates the first CSI-RS resource, and a second TCI state of a second PDSCH associated with the second TRP indicates the second CSI-RS resource, and
- wherein the plurality of the first antenna ports and the plurality of the second antenna ports do not associate with same QCL parameters.
6 more elements
A base station comprising:
- a transmitter that transmits higher layer signaling including a configuration of a first channel state information (CSI)-reference signal (RS) resource and a second CSI-RS resource;
- and
- a processor that controls transmission of the first CSI-RS resource and the second CSI-RS resource based on the configuration,
- wherein the first CSI-RS resource is transmitted from a first transmission/reception point (TRP) and is associated with a plurality of first antenna ports, and the second CSI-RS resource is transmitted from a second TRP and is associated with a plurality of second antenna ports;
- the first CSI-RS resource and the second CSI-RS resource are transmitted at a same time and at a same frequency, the first CSI-RS resource and the second CSI-RS resource overlap in the same time, and the first CSI-RS resource and the second CSI-RS resource overlap in the same frequency,
- a transmission power of a CSI-RS in the first CSI-RS resource and the second CSI-RS resource is determined as a function of a ratio of a Physical Downlink Shared Channel (PDSCH) transmission power,
- each of the plurality of the first antenna ports and the plurality of the second antenna ports comprises a maximum of 32 antenna ports, and
- a first transmission configuration indicator (TCI) state of a first PDSCH associated with the first TRP indicates the first CSI-RS resource, and a second TCI state of a second PDSCH associated with the second TRP indicates the second CSI-RS resource, and
- wherein the plurality of the first antenna ports and the plurality of the second antenna ports do not associate with same QCL parameters.
6 more elements
A system comprising a terminal, a first transmission/reception point (TRP) and a second TRP, wherein:
- the terminal comprises:
- a receiver that receives higher layer signaling including a configuration of a first channel state information (CSI)-reference signal (RS) resource and a second CSI-RS resource;
- and
- a processor that performs a measurement on the first CSI-RS resource and the second CSI-RS resource based on the configuration,
- wherein the first CSI-RS resource is transmitted from the first TRP and is associated with a plurality of first antenna ports, and the second CSI-RS resource is transmitted from the second TRP and is associated with a plurality of second antenna ports;
- the first CSI-RS resource and the second CSI-RS resource are transmitted at a same time and at a same frequency, the first CSI-RS resource and the second CSI-RS resource overlap in the same time, and the first CSI-RS resource and the second CSI-RS resource overlap in the same frequency,
- a transmission power of a CSI-RS in the first CSI-RS resource and the second CSI-RS resource is determined as a function of a ratio of a Physical Downlink Shared Channel (PDSCH) transmission power,
- each of the plurality of the first antenna ports and the plurality of the second antenna ports comprises a maximum of 32 antenna ports, and
- a first transmission configuration indicator (TCI) state of a first PDSCH associated with the first TRP indicates the first CSI-RS resource, and a second TCI state of a second PDSCH associated with the second TRP indicates the second CSI-RS resource, and
- wherein the plurality of the first antenna ports and the plurality of the second antenna ports do not associate with same QCL parameters,
- the first TRP comprises:
- a first transmitter that transmits the first CSI-RS resource, and
- the second TRP comprises:
- a second transmitter that transmits the second CSI-RS resource.
11 more elements
Dependencies are inferred from the claim text.