User terminal and radio communication method

Patent metadata

Field	Value
Publication number	US-12101178-B2
Application number	US-201917422053-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Jan 11, 2019
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A user terminal includes: a control section to which one mode of a plurality of modes associated with different operations of one or more transmission points is configured; and a receiving section that receives one or more downlink shared channels from the one or more transmission points according to the mode. According to one aspect of the present disclosure, it is possible to appropriately operate in response to operations of one or more transmission points.

First claim

The invention claimed is:

1. A terminal comprising:
a processor that determines whether to apply:
a first mode using a plurality of transmission and reception points (TRPs) based on single-downlink control information (DCI), in response to an activation by a medium access control (MAC) control element and an indication by a specific field included in the DCI and
a second mode using the plurality of TRPs based on multi-DCI, in response to a configuration by radio resource control (RRC) signaling; and

a receiver that receives at least one physical downlink shared channel (PDSCH) according to the one of the first mode and the second mode,
wherein the terminal receives one DCI from one of the plurality of TRPs in case of the first mode, and the terminal receives different DCIs from each of the plurality of TRPs in case of the second mode, and
wherein a transmission configuration indication (TCI) field in a DCI received in the first mode and a TCI field in a DCI received in the second mode are 0 bit or 3 bits.

2. The terminal according to claim 1 , wherein the processor determines, based on a common RRC parameter, a number of bits of a TCI field included in first DCI and a number of bits of a TCI field included in second DCI, in the second mode.

3. The terminal according to claim 1 , wherein a carrier indicator field in a DCI received in the first mode and a carrier indicator field in a DCI received in the second mode are 0 bit or 3 bits.

4. A radio communication method for a terminal, comprising:
determining whether to apply:
a first mode using a plurality of transmission and reception points (TRPs) based on single-downlink control information (DCI), in response to an activation by a medium access control (MAC) control element and an indication by a specific field included in the DCI and
a second mode using the plurality of TRPs based on multi-DCI, in response to a configuration by radio resource control (RRC) signaling; and

receiving at least one physical downlink shared channel (PDSCH) according to the one of the first mode and the second mode,
wherein the terminal receives one DCI from one of the plurality of TRPs in case of the first mode, and the terminal receives different DCIs from each of the plurality of TRPs in case of the second mode, and
wherein a transmission configuration indication (TCI) field in a DCI received in the first mode and a TCI field in a DCI received in the second mode are 0 bit or 3 bits.

5. A base station comprising:
a processor that indicates to apply:
a first mode using a plurality of transmission and reception points (TRPs) based on single-downlink control information (DCI), in response to an activation by medium access control (MAC) control element and an indication by a specific field included in the DCI and
a second mode using the plurality of TRPs based on multi-DCI, in response to a configuration by radio resource control (RRC) signaling; and

a transmitter that transmits, by using one of the first mode and the second mode, at least one physical downlink shared channel (PDSCH),
wherein a terminal receives one DCI from one of the plurality of TRPs in case of the first mode, and the terminal receives different DCIs from each of the plurality of TRPs in case of the second mode, and
wherein a transmission configuration indication (TCI) field in a DCI received by the terminal in the first mode and a TCI field in a DCI received by the terminal in the second mode are 0 bit or 3 bits.

6. A system comprising a base station and a terminal, wherein
the base station comprises:
a first processor that indicates to apply:
a first mode using a plurality of transmission and reception points (TRPs) based on single-downlink control information (DCI), in response to an activation by a medium access control (MAC) control element and an indication by a specific field included in the DCI and
a second mode using the plurality of TRPs based on multi-DCI, in response to a configuration by radio resource control (RRC) signaling, and

the terminal comprises:
a second processor that determines whether to apply the first mode and the second mode; and
a receiver that receives at least one physical downlink shared channel (PDSCH) according to one of the first mode and the second mode,
wherein the terminal receives one DCI from one of the a plurality of TRPs in case of the first mode, and the terminal receives different DCIs from each of the plurality of TRPs in case of the second mode, and
wherein a transmission configuration indication (TCI) field in a DCI received in the first mode and a TCI field in a DCI received in the second mode are 0 bit or 3 bits.

Assignees

• Ntt Docomo Inc

Inventors

• Matsumura Yuki
• Nagata Satoshi
• Wang Runxin
• Wang Jing
• Hou Xiaolin

Classifications

• H04B7/06968

  using quasi-colocation [QCL] between signals · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/1263

  Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04B7/088

  using beam selection · CPC title