Distributed station, aggregation station, terminal, and communication method

1. A first distributed station to be used in a communication system including an aggregation station connected to a core network, the first distributed station, and a second distributed station; the first distributed station; the second distributed station; a first wireless device connected to the first distributed station; a second wireless device connected to the first distributed station and the second distributed station; and a terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the first distributed station -comprising:

receiver circuitry which, in operation, receives, from the terminal via the first wireless device, information regarding switching from a wireless connection between the terminal and the first wireless device to a wireless connection between the terminal and the second wireless device; and

controller circuitry which, in operation, determines, based on the information, (i) switching from the wireless connection between the terminal and the first wireless device to the wireless connection between the terminal and the second wireless device and (ii) performing communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station.

2. The first distributed station according to claim 1 , wherein the controller circuitry notifies the terminal, using any signaling of layer 1, layer 2, or layer 3, about the performing of the communication between the terminal and the core network through the second wireless device through the BWP provided by the first distributed station and the BWP provided by the second distributed station.

3. The first distributed station according to claim 1 , wherein

the first wireless device and the second wireless device form a first cell, and

the information includes reception quality of the first wireless device in the first cell and reception quality of the second wireless device in the first cell.

4. The first distributed station according to claim 1 , wherein

the first wireless device and the second wireless device form a first cell,

the second wireless device forms a second cell, and

the information includes reception quality of the second wireless device in the first cell and reception quality of the first wireless device in the first cell, the reception quality of the first wireless device corresponding to a bandwidth of the second cell.

5. The first distributed station according to claim 1 , wherein the information includes position information about the terminal.

6. An aggregation station to be used in a communication system including the aggregation station connected to a core network, a first distributed station connected to the aggregation station, a second distributed station connected to the aggregation station, a first wireless device connected to the first distributed station, a second wireless device connected to the first distributed station and the second distributed station, and a terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the aggregation station comprising:

receiver circuitry which, in operation, receives, from the first distributed station that controls the first wireless device that wirelessly communicates with the terminal, a setup request for performing communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station; and

controller circuitry which, in operation, sets, in response to the setup request, a terminal context and bearer regarding the performing of the communication between the terminal and the core network through the second wireless device through the BWP provided by the first distributed station and the BWP provided by the second distributed station.

7. A terminal to be used in a communication system including an aggregation station connected to a core network, a first distributed station connected to the aggregation station, a second distributed station connected to the aggregation station, a first wireless device connected to the first distributed station, a second wireless device connected to the first distributed station and the second distributed station, and the terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the terminal comprising:

receiver circuitry which, in operation, receives, from the first distributed station via the first wireless device, instruction information instructing (i) switching from a wireless connection between the terminal and the first wireless device to a wireless connection between the terminal and the second wireless device and (ii) performing of communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station; and

controller circuitry which, in operation, performs, based on the instruction information, the communication between the terminal and the core network through the second wireless device through the BWP provided by the first distributed station and the BWP provided by the second distributed station.

8. A communication method performed by a first distributed station to be used in a communication system including an aggregation station connected to a core network, the first distributed station, and a second distributed station; the first distributed station; the second distributed station; a first wireless device connected to the first distributed station; a second wireless device connected to the first distributed station and the second distributed station; and a terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the communication method comprising:

receiving, from the terminal via the first wireless device, information regarding switching from a wireless connection between the terminal and the first wireless device to a wireless connection between the terminal and the second wireless device; and

determining, based on the information, (i) switching from the wireless connection between the terminal and the first wireless device to the wireless connection between the terminal and the second wireless device and (ii) performing communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station.

9. A communication method performed by an aggregation station to be used in a communication system including the aggregation station connected to a core network, a first distributed station connected to the aggregation station, a second distributed station connected to the aggregation station, a first wireless device connected to the first distributed station, a second wireless device connected to the first distributed station and the second distributed station, and a terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the communication method comprising:

receiving, from the first distributed station that controls the first wireless device that wirelessly communicates with the terminal, a setup request for performing communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station; and

setting, in response to the setup request, a terminal context and bearer regarding the performing of the communication between the terminal and the core network through the second wireless device through the BWP provided by the first distributed station and the BWP provided by the second distributed station.

10. A communication method performed by a terminal to be used in a communication system including an aggregation station connected to a core network, a first distributed station connected to the aggregation station, a second distributed station connected to the aggregation station, a first wireless device connected to the first distributed station, a second wireless device connected to the first distributed station and the second distributed station, and the terminal wirelessly connected to at least one of the first wireless device or the second wireless device, the communication method comprising:

receiving, from the first distributed station via the first wireless device, instruction information instructing (i) switching from a wireless connection between the terminal and the first wireless device to a wireless connection between the terminal and the second wireless device and (ii) performing of communication between the terminal and the core network through the second wireless device through a bandwidth part (BWP) provided by the first distributed station and a BWP provided by the second distributed station; and

performing, based on the instruction information, the communication between the terminal and the core network through the second wireless device through the BWP provided by the first distributed station and the BWP provided by the second distributed station.