Granted Patent B2

US 12,641,615 · App. 17/770,057 · Granted May 26, 2026

Inventors: Naoki Kusashima (Tokyo, JP); Ken Tanaka (Tokyo, JP); Hiroki Matsuda (Tokyo, JP); Shinichiro Tsuda (Tokyo, JP)

Assignee: SONY GROUP CORPORATION

H04W72/23H04L27/2602H04W72/0453H04L27/2614

Abstract

Claims (46)

1 . A terminal device comprising

a transceiver; and

control circuitry configured to perform an operation, the operation comprising:

receiving, from a base station, a downlink communication via a multicarrier signal;

acquiring, from the base station, information for switching from the multicarrier signal to a specific single carrier, the specific single carrier being one of a plurality of single carriers, the information for the switching being received from the base station via a predetermined single carrier of the plurality of single carriers that is different from the specific single carrier and that is defined for, and thereby implicitly identifies, the specific single carrier, and

based on the information for the switching, switching from the multicarrier signal to the specific single carrier and receiving the downlink communication from the base station via the specific single carrier,

wherein the plurality of single carriers respectively corresponds to a plurality of synchronization signal sequences, and the received predetermined single carrier that is defined for, and thereby implicitly identifies, the specific single carrier is a waveform of a specific synchronization signal sequence of the plurality of synchronization signal sequences, and

wherein the information for the switching is implicitly indicated by a configuration of the specific synchronization signal sequence which has been provided to the communication apparatus in advance.

2 . The terminal device according to claim 1 , wherein the operation further comprises:

receiving at least one of a synchronization signal block, a Physical Downlink Control Channel (PDCCH), or a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, by using the predetermined single carrier, regardless of the specific single carrier.

3 . The terminal device according to claim 1 , wherein the specific single carrier is identical to a single carrier that is used for uplink communication with the base station.

4 . The terminal device according to claim 1 , wherein the operation further comprises:

based on the information about the switching, using the specific single carrier for communication with the base station via a secondary cell group,

wherein the information about the switching is acquired through communication with the base station via a master cell group.

5 . A base station apparatus comprising:

a transceiver; and

control circuitry configured to perform an operation, the operation comprising:

transmitting, to a terminal device, a downlink communication via a multicarrier signal;

determining to switch from the multicarrier signal to a specific single carrier that is to be used by the terminal device for the downlink communication;

transmitting, to the terminal device, information for the switching from the multicarrier signal to the specific single carrier, the specific single carrier being one of a plurality of single carriers, the information for the switching being transmitted to the terminal device via a predetermined single carrier of the plurality of single carriers that is different from the specific single carrier and that is defined for, and thereby implicitly identifies, the specific single carrier; and

based on the information for the switching, switching from the multicarrier signal to the specific single carrier and transmitting the downlink communication to the terminal device via the specific single carrier,

wherein the plurality of single carriers respectively corresponds to a plurality of synchronization signal sequences, and the received predetermined single carrier that is defined for, and thereby implicitly identifies, the specific single carrier is a waveform of a specific synchronization signal sequence of the plurality of synchronization signal sequences, and

wherein the information for the switching is implicitly indicated by a configuration of the specific synchronization signal sequence which has been provided to the communication apparatus in advance.

6 . The base station apparatus according to claim 5 , wherein the determining to switch comprises determining to switch based on a predetermined criteria that comprises at least one of:

a terminal device position parameter, or

a channel width or bandwidth parameter, or

a time length or a slot length parameter.

7 . The base station apparatus according to claim 5 , wherein the operation further comprises:

discontinuously allocating the multicarrier signal to communication resources used to communicate with the terminal device; and

continuously allocating the single carrier signal to the communication resources.

8 . The base station apparatus according to claim 5 , wherein the operation further comprises determining a number of data signals to be multiplexed into the specific single carrier, when the data signals to be transmitted to a plurality of the terminal devices are multiplexed on a same resource.

9 . The base station apparatus according to claim 5 , wherein the operation further comprises:

determining a modulation method for a signal to be transmitted to the terminal device, according to the specific single carrier.

10 . A communication method performed by a terminal device, the communication method comprising:

receiving, from a base station, a downlink communication via a multicarrier signal;

acquiring, from the base station, information for switching from the multicarrier signal to a specific single carrier, the specific single carrier being one of a plurality of single carriers, the information for the switching being received from the base station via a predetermined single carrier of the plurality of single carriers that is different from the specific single carrier and that is defined for, and thereby implicitly identifies, the specific single carrier, and

based on the information for the switching, switching from the multicarrier signal to the specific single carrier and receiving the downlink communication from the base station via the specific single carrier,

wherein the plurality of single carriers respectively corresponds to a plurality of synchronization signal sequences, and the received predetermined single carrier that is defined for, and thereby implicitly identifies, the specific single carrier is a waveform of a specific synchronization signal sequence of the plurality of synchronization signal sequences, and

wherein the information for the switching is implicitly indicated by a configuration of the specific synchronization signal sequence which has been provided to the communication apparatus in advance.

11 . A communication method performed by a base station device, the communication method comprising:

transmitting, to a terminal device, a downlink communication via a multicarrier signal;

determining to switch from the multicarrier signal to a specific single carrier that is to be used by the terminal device for the downlink communication;

transmitting, to the terminal device, information for the switching from the multicarrier signal to the specific single carrier, the specific single carrier being one of a plurality of single carriers, the information for the switching being transmitted to the terminal device via a predetermined single carrier of the plurality of single carriers that is different from the specific single carrier and that is defined for, and thereby implicitly identifies, the specific single carrier; and

based on the information for the switching, switching from the multicarrier signal to the specific single carrier and transmitting the downlink communication to the terminal device via the specific single carrier,

wherein the plurality of single carriers respectively corresponds to a plurality of synchronization signal sequences, and the received predetermined single carrier that is defined for, and thereby implicitly identifies, the specific single carrier is a waveform of a specific synchronization signal sequence of the plurality of synchronization signal sequences, and

wherein the information for the switching is implicitly indicated by a configuration of the specific synchronization signal sequence which has been provided to the communication apparatus in advance.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (37)