Back to results
US 2012/0236771 A1Published application
Uplink control channel resource mapping for carrier aggregation
AssigneeQUALCOMM Incorporated
InventorsXiliang Luo, Peter Gaal, Wanshi Chen
Life of this patent
Estimating the term…
Abstract
In a multi-carrier wireless communication system, component carrier configuration and reconfiguration uses uplink control channel resource mapping with fallback configurations to maintain alignment between a user equipment and a base station during reconfiguration.
Claims51
A method of wireless communication, comprising:
- determining a first number of ACK/NACK bits for acknowledging downlink data transmissions on a first configuration of a plurality of component carriers (CCs) configured for a multi-carrier user equipment (UE);
- selecting a first mapping of ACK/NACK bits to uplink control channel resources based on the first number of ACK/NACK bits, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a single component carrier configuration for downlink data transmissions in a second mapping of ACK/NACK bits to uplink control channel resources;
- determining uplink control channel resources for acknowledging the downlink data transmissions on the first configuration of CCs based on the first mapping;
- and
- sending ACK/NACK information for the downlink data transmissions, on uplink control channel resources based on the first mapping.
2 more elements
A method in a base station, comprising:
- receiving, at the base station, ACK/NACK information from a user equipment (UE) on uplink control channel resources, acknowledging downlink data transmissions;
- determining ACK/NACK bits from the ACK/NACK information based on a first mapping of uplink control channel resources corresponding to a configuration of the UE, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a configuration for downlink data transmissions on the single component carrier in a second mapping of uplink control channel resources to ACK/NACK bits;
- transmitting a higher-layer command for a second configuration of downlink component carriers;
- and
- scheduling downlink data transmission to the UE on only a single component carrier for a predetermined period after transmission of the higher-layer command.
2 more elements
An apparatus, comprising:
- a processor;
- and
- a memory comprising processor executable instructions that, when executed by the processor, configures the apparatus as a multi-carrier user equipment (UE) to:
- determine a first number of ACK/NACK bits for acknowledging downlink data transmissions on a first configuration of a plurality of component carriers (CCs) configured for the multi-carrier UE;
- select a first mapping of ACK/NACK bits to uplink control channel resources based on the first number of ACK/NACK bits, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a single component carrier configuration for downlink data transmissions in a second mapping of ACK/NACK bits to uplink control channel resources;
- determine uplink control channel resources for acknowledging the downlink data transmissions on the first configuration of CCs based on the first mapping;
- and
- send ACK/NACK information for the downlink data transmissions, on uplink control channel resources based on the first mapping.
5 more elements
An apparatus, comprising:
- a processor;
- and
- a memory comprising processor executable instructions that, when executed by the processor, configures the apparatus as a base station to:
- receive, at the base station, ACK/NACK information from a user equipment (UE) on uplink control channel resources, acknowledging downlink data transmissions;
- determine ACK/NACK bits from the ACK/NACK information based on a first mapping of uplink control channel resources corresponding to a configuration of the UE, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a configuration for downlink data transmissions on the single component carrier in a second mapping of uplink control channel resources to ACK/NACK bits;
- transmit a higher-layer command for a second configuration of downlink component carriers;
- and
- schedule downlink data transmission to the UE on only a single component carrier for a predetermined period after transmission of the higher-layer command.
5 more elements
An article of manufacture, comprising a non-transitory machine-readable medium having instructions therein that, when executed by the machine, configure the machine as a multi-carrier user equipment (UE) to:
- determine a first number of ACK/NACK bits for acknowledging downlink data transmissions on a first configuration of a plurality of component carriers (CCs) configured for the multi-carrier UE;
- select a first mapping of ACK/NACK bits to uplink control channel resources based on the first number of ACK/NACK bits, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a single component carrier configuration for downlink data transmissions in a second mapping of ACK/NACK bits to uplink control channel resources;
- determine uplink control channel resources for acknowledging the downlink data transmissions on the first configuration of CCs based on the first mapping;
- and
- send ACK/NACK information for the downlink data transmissions, on uplink control channel resources based on the first mapping.
2 more elements
A apparatus for wireless communication, comprising:
- means for determining a first number of ACK/NACK bits for acknowledging downlink data transmissions on a first configuration of a plurality of component carriers (CCs) configured for a multi-carrier user equipment (UE);
- means for selecting a first mapping of ACK/NACK bits to uplink control channel resources based on the first number of ACK/NACK bits, the first mapping comprising a fallback configuration for downlink data transmissions on a single component carrier, wherein the fallback configuration matches a single component carrier configuration for downlink data transmissions in a second mapping of ACK/NACK bits to uplink control channel resources;
- means for determining uplink control channel resources for acknowledging the downlink data transmissions on the first configuration of CCs based on the first mapping;
- and
- means for sending ACK/NACK information for the downlink data transmissions, on uplink control channel resources based on the first mapping.
2 more elements
Dependencies are inferred from the claim text.