User terminal radio base station and radio communication method
First Claim
1. A user terminal comprising:
- a reception section that receives downlink shared channel signals using component carriers of a primary cell and a secondary cell;
a generating section that generates transmission acknowledgement signals in response to the downlink shared channel signals; and
a transmission section that transmits the transmission acknowledgement signals by using predetermined uplink control channel resources,wherein the transmission section transmits the transmission acknowledgement signals to either or both of uplink control channel resources of the primary cell and uplink control channel resources of the secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format, andwhen three or more cells are configured and the user terminal does not receive downlink control information from the secondary cell, the transmission section transmits the transmission acknowledgement signals by using the uplink control channel resources of the primary cell.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to control feedback control information in uplink transmission appropriately even when using carrier aggregation in HetNet, the present invention provides a user terminal that is able to communicate with a plurality of radio base stations having overlapping coverage areas by using carrier aggregation, the user terminal comprising: a reception section that receives downlink shared channel signals using component carriers of a primary cell and a secondary cell; a generating section that generates transmission acknowledgement signals in response to the downlink shared channel signals; and an allocating section that allocates the transmission acknowledgement signals to predetermined uplink control channel resources, wherein the allocating section allocates the transmission acknowledgement signals to either or both of uplink control channel resources of the primary cell and uplink control channel resources of the secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format.
25 Citations
7 Claims
-
1. A user terminal comprising:
-
a reception section that receives downlink shared channel signals using component carriers of a primary cell and a secondary cell; a generating section that generates transmission acknowledgement signals in response to the downlink shared channel signals; and a transmission section that transmits the transmission acknowledgement signals by using predetermined uplink control channel resources, wherein the transmission section transmits the transmission acknowledgement signals to either or both of uplink control channel resources of the primary cell and uplink control channel resources of the secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format, and when three or more cells are configured and the user terminal does not receive downlink control information from the secondary cell, the transmission section transmits the transmission acknowledgement signals by using the uplink control channel resources of the primary cell. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A radio base station comprising:
-
a transmission section that transmits downlink shared channel signals to a user terminal; a reception section that receives transmission acknowledgement signals in response to the downlink shared channel signals from the user terminal by using given uplink control channel resources; and a control section that controls retransmission based on the transmission acknowledgement signals, wherein the reception section receives the transmission acknowledgement signals in either or both of uplink control channel resources of a primary cell and uplink control channel resources of a secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format, and when three or more cells are configured and the user terminal does not receive downlink control information from the secondary cell, the reception section receives the transmission acknowledgement signals by using the uplink control channel resources of the primary cell.
-
-
7. A radio communication method for a user terminal comprising:
-
receiving downlink shared channel signals using component carriers of a primary cell and a secondary cell; generating transmission acknowledgement signals in response to the downlink shared channel signals; and transmitting the transmission acknowledgement signals by using predetermined uplink control channel resources, wherein the user terminal transmits the transmission acknowledgement signals to either or both of uplink control channel resources of the primary cell and uplink control channel resources of the secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format, and when three or more cells are configured and the user terminal does not receive downlink control information from the secondary cell, the user terminal transmits the transmission acknowledgement signals by using the uplink control channel resources of the primary cell.
-
Specification