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US 2026/0230252 A1Published application
Communication apparatus, base station, and communication method
AssigneeDenso Corporation
InventorsDaiki MAEMOTO, Tatsuki NAGANO
Life of this patent
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Abstract
A communication apparatus according to an embodiment comprises: a receiver and a controller. The receiver is configured to receive, after the first PUSCH transmission, on a PDCCH for a C-RNTI, based on information for configuring a search space of the PDCCH. The information is included in the LTM candidate information configuration corresponding to the target configuration identifier. The controller is configured to determine whether or not the LTM cell switch is successfully completed based on a HARQ process identifier received on the PDCCH and a HARQ process identifier for the first PUSCH transmission.
Claims9
A communication apparatus comprising:
- a receiver configured to:
- receive, from a base station, a radio resource control (RRC) message including Layer 1/Layer 2 triggered mobility (LTM) configuration information, the LTM configuration information including one or more LTM candidate information configurations, and
- receive, from the base station, a cell switch command medium access control (MAC) control element (CE) including a target configuration identifier and a timing advance command;
- and
- a controller configured to:
- skip a random access (RA) procedure for an LTM cell switch based on a value of the timing advance command, and
- perform a first physical uplink shared channel (PUSCH) transmission in the LTM cell switch, wherein
- the receiver is configured to receive, after the first PUSCH transmission, on a physical downlink control channel (PDCCH) for a cell radio network temporary identifier (C-RNTI), based on information for configuring a search space of the PDCCH, the information for configuring the search space of the PDCCH being included in the LTM candidate information configuration corresponding to the target configuration identifier, and
- the controller is configured to determine whether or not the LTM cell switch is successfully completed based on a hybrid automatic repeat request (HARQ) process identifier received on the PDCCH and a HARQ process identifier for the first PUSCH transmission.
6 more elements
A base station comprising:
- a transmitter configured to:
- transmit, to a communication apparatus, a radio resource control (RRC) message including Layer 1/Layer 2 triggered mobility (LTM) configuration information, the LTM configuration information including one or more LTM candidate information configurations, and
- transmit, to the communication apparatus, a cell switch command medium access control (MAC) control element (CE) including a target configuration identifier and a timing advance command;
- a controller configured to control to skip a random access (RA) procedure for an LTM cell switch based on a value of the timing advance command, and
- a receiver configured to receive, from the communication apparatus, a first physical uplink shared channel (PUSCH) transmission in the LTM cell switch, wherein
- the transmitter is configured to transmit, after receiving the first PUSCH transmission, on a physical downlink control channel (PDCCH) for a cell radio network temporary identifier (C-RNTI), based on information for configuring a search space of the PDCCH, the information for configuring the search space of the PDCCH being included in the LTM candidate information configuration corresponding to the target configuration identifier, and
- whether or not the LTM cell switch is successfully completed is indicated based on a hybrid automatic repeat request (HARQ) process identifier transmitted on the PDCCH and a HARQ process identifier for the first PUSCH transmission.
4 more elements
A communication method for a communication apparatus comprising the steps of:
- receiving, from a base station, a radio resource control (RRC) message including Layer 1/Layer 2 triggered mobility (LTM) configuration information, the LTM configuration information including one or more LTM candidate information configurations;
- receiving, from the base station, a cell switch command medium access control (MAC) control element (CE) including a target configuration identifier and a timing advance command;
- skipping a random access (RA) procedure for an LTM cell switch based on a value of the timing advance command;
- performing a first physical uplink shared channel (PUSCH) transmission in the LTM cell switch;
- and
- receiving, after the first PUSCH transmission, on a physical downlink control channel (PDCCH) for a cell radio network temporary identifier (C-RNTI), based on information for configuring a search space of the PDCCH, the information for configuring the search space of the PDCCH being included in the LTM candidate information configuration corresponding to the target configuration identifier, wherein
- whether or not the LTM cell switch is successfully completed is determined based on a hybrid automatic repeat request (HARQ) process identifier received on the PDCCH and a HARQ process identifier for the first PUSCH transmission.
4 more elements
Dependencies are inferred from the claim text.