User apparatus and base station
AssigneeNtt Docomo, Inc.
InventorsTooru Uchino, Kazuki Takeda, Hideaki Takahashi
Life of this patent
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Abstract
A user apparatus includes an information storage unit configured to store band combination information indicating a combination of bands that can be used in carrier aggregation in the user apparatus, and a notification control unit configured to explicitly or implicitly add, to the band combination information, capability information indicating whether the user apparatus is able to set a primary cell by using a band of a first duplex mode in the carrier aggregation, and to notify a base station of the band combination information to which the capability information is added.
Claims17
A user apparatus in a mobile communication system configured to perform carrier aggregation using a band of a first duplex mode and a band of a second duplex mode, comprising:
- a memory that stores band combination information indicating a combination of bands that can be used in the carrier aggregation in the user apparatus;
- and
- a processor that explicitly or implicitly adds, to the band combination information, capability information indicating whether the user apparatus is able to set a primary cell or a Primary Secondary Cell (PSCell) in dual connectivity using the band of the first duplex mode in the carrier aggregation, and notifies a base station of the band combination information to which the capability information is added,
- wherein one of the first and second duplex modes is time division duplex (TDD) mode and the other of the first and second duplex mode is frequency division duplex (FDD) mode,
- wherein the mobile communication system is configured to perform the carrier aggregation using a combination of the TDD mode and the FDD mode, and
- wherein a physical uplink control channel that carries an acknowledgement or a negative acknowledgement is transmitted only by the primary cell in a Master Cell Group (MCG) and only by the PSCell in a Secondary Cell Group (SCG) in the dual connectivity.
A base station in a mobile communication system configured to perform carrier aggregation using a band of a first duplex mode and a band of a second duplex mode, comprising:
- a receiver that receives band combination information indicating a combination of bands in the carrier aggregation from the user apparatus;
- and
- a processor that determines whether the user apparatus is able to set a primary cell or a Primary Secondary Cell (PSCell) in dual connectivity using the band of the first duplex mode in the carrier aggregation based on capability information that is explicitly or implicitly added to the band combination information received by the receiver,
- wherein one of the first and second duplex modes is time division duplex (TDD) mode and the other of the first and second duplex mode is frequency division duplex (FDD) mode,
- wherein the mobile communication system is configured to perform the carrier aggregation using a combination of the TDD mode and the FDD mode, and
- wherein a physical uplink control channel that carries an acknowledgement or a negative acknowledgement is transmitted only by the primary cell in a Master Cell Group (MCG) and only by the PSCell in a Secondary Cell Group (SCG) in the dual connectivity.
Dependencies are inferred from the claim text.