Granted Patent B2

US 12,273,749 · App. 17/620,872 · Granted Apr 8, 2025

Inventors: Shohei Yoshioka (Tokyo, JP); Satoshi Nagata (Tokyo, JP); Lihui Wang (Beijing, CN); Xiaolin Hou (Beijing, CN)

Assignee: NTT DOCOMO, INC.

H04W24/08H04L5/0051H04W16/28H04W72/1273

Abstract

Claims (22)

1. A terminal comprising:

a receiver that receives cell-specific or terminal-specific configuration information related to a physical downlink control channel that schedules a physical downlink shared channel that is associated with a multicast traffic channel; and

a controller that controls, on the basis of the configuration information, a configuration of a search space set to monitor the physical downlink control channel,

wherein, when the terminal is in an idle state, the controller controls to receive the physical downlink control channel assuming that a demodulation reference signal for the physical downlink control channel is in a quasi-co-location relationship with a synchronization signal block, and

the idle state is a state in which a radio resource control (RRC) connection is not established.

2. The terminal according to claim 1 , wherein

the search space set is associated with a multicast-specific control resource set, a common control resource set configured on the basis of the cell-specific configuration information, or a control resource set configured on the basis of the terminal-specific configuration information.

3. The terminal according to claim 1 , wherein, when the terminal is in an inactive state, the controller controls reception of the physical downlink control channel assuming that a demodulation reference signal for the physical downlink control channel is in a quasi-co-location relationship with the synchronization signal block.

4. A radio communication method for a terminal, the radio communication method comprising:

receiving cell-specific or terminal-specific configuration information related to a physical downlink control channel that schedules a physical downlink shared channel that is associated with a multicast traffic channel; and

controlling, on the basis of the configuration information, a configuration of a search space set to monitor the physical downlink control channel,

wherein, when the terminal is in an idle state, controlling to receive the physical downlink control channel assuming that a demodulation reference signal for the physical downlink control channel is in a quasi-co-location relationship with a synchronization signal block, and

the idle state is a state in which a radio resource control (RRC) connection is not established.

5. The terminal according to claim 2 , wherein, when the terminal is in an inactive state, the controller controls reception of the physical downlink control channel assuming that a demodulation reference signal for the physical downlink control channel is in a quasi-co-location relationship with the synchronization signal block.

6. A system comprising a terminal and a base station, wherein:

the terminal comprises:

a receiver that receives cell-specific or terminal-specific configuration information related to a physical downlink control channel that schedules a physical downlink shared channel that is associated with a multicast traffic channel; and

a controller that controls, on the basis of the configuration information, a configuration of a search space set to monitor the physical downlink control channel,

wherein, when the terminal is in an idle state, the controller controls to receive the physical downlink control channel assuming that a demodulation reference signal for the physical downlink control channel is in a quasi-co-location relationship with a synchronization signal block, and

the idle state is a state in which a radio resource control (RRC) connection is not established, and

the base station comprises:

a transmitter that transmits, to the terminal, the cell-specific or the terminal-specific configuration information.

Assignments (1)

Continuity (1)

References Cited (14)