Terminal apparatus, base station apparatus and communication method
The present invention enables efficient transmission/reception of a signal including control information between a base station apparatus and a mobile station apparatus. To realize this, there are provided a receiver configured to receive an enhanced physical downlink control channel from the base station apparatus; a setting unit configured to be able to set, using at least a format of downlink control information included in the received enhanced physical downlink control channel, one of a plurality of possible sets of M, M being the number of first elements that constitute the enhanced physical downlink control channel; and a monitoring unit configured to monitor a search region in which the enhanced physical downlink control channel obtained on the basis of the set possible set of M is possibly mapped.
1. A terminal apparatus comprising:
a receiver configured to and/or programmed to monitor a set of enhanced physical downlink control channel candidates according to downlink control information format; and
a controller configured to and/or programmed to select a value set from a plurality of value sets on the basis of at least the downlink control information format, wherein
the set of enhanced physical downlink control channel candidates includes a plurality of enhanced physical downlink control channel candidates respectively associated with a plurality of Aggregation Levels, each of the plurality of Aggregation Levels corresponding to a value in the selected value set,
each value in the selected value set defines a number of enhanced control channel elements (ECCEs) in a respective one of the enhanced physical downlink control channel candidates, and
the controller is configured to and/or programmed to detect an enhanced physical downlink control channel that is one of the enhanced physical downlink control channel candidates, by monitoring a search space in which the enhanced physical downlink control channel is mapped based on a specific Aggregation Level, corresponding to a specific value in the selected value set, the enhanced physical downlink control channel being mapped using a plurality of second elements and ECCEs that are mapped to the plurality of second elements, the plurality of second elements constituting at least a part of one or a plurality of resource block pairs.
2. A base station apparatus comprising:
a controller configured to and/or programmed to select a value set from a plurality of value sets, the selection being based on at least a downlink control information format of a downlink control information to be transmitted; and
a transmitter configured to and/or programmed to transmit an enhanced physical downlink control channel that is one of a plurality of enhanced physical downlink control channel candidates and carries the downlink control information, by using the downlink control information format and by mapping the enhanced physical downlink control channel in a search space based on a specific Aggregation Level corresponding to a specific value in the selected value set, wherein
the enhanced physical downlink control channel candidates are respectively associated with a plurality of Aggregation Levels, each of the Aggregation Levels corresponding to a value in the value set,
each value in the selected value set defines the number of enhanced control channel elements (ECCEs) in a respective one of the enhanced physical downlink control channel candidates, and
the enhanced physical downlink control channel is mapped using a plurality of second elements and ECCEs that are mapped to the plurality of second elements, the plurality of second elements constituting at least a part of one or a plurality of resource block pairs.
3. A communication method of a terminal apparatus comprising:
monitoring a set of enhanced physical downlink control channel candidates according to downlink control information format; and
selecting a value set from a plurality of value sets on the basis of at least the downlink control information format, wherein
the set of enhanced physical downlink control channel candidates includes a plurality of enhanced physical downlink control channel candidates respectively associated with a plurality of Aggregation Levels, each of the plurality of Aggregation Levels corresponding to a value in the value set,
each value in the selected value set defines a number of enhanced control channel elements (ECCEs) in a respective one of the enhanced physical downlink control channel candidates, and
the communication method further comprises:
detecting an enhanced physical downlink control channel that is one of the enhanced physical downlink control channel candidates, by monitoring a search space in which the enhanced physical downlink control channel is mapped based on a specific Aggregation Level corresponding to a specific value in the selected value set, the enhanced physical downlink control channel being mapped using a plurality of second elements and ECCEs that are mapped to the plurality of second elements, the plurality of second elements constituting at least a part of one or a plurality of resource block pairs.
4. A communication method of a base station apparatus, comprising:
selecting a value set from a plurality of value sets on the basis of at least a downlink control information format of a downlink control information; and
transmitting an enhanced physical downlink control channel that is one of a plurality of enhanced physical downlink control channel candidates and carries the downlink control information, by using the downlink control information format and by mapping the enhanced physical downlink control channel in a search space based on a specific Aggregation Level corresponding to a specific value in the selected value set, wherein
the enhanced physical downlink control channel candidates are respectively associated with a plurality of Aggregation Levels, each of the Aggregation Levels corresponding to a value in the value set,
each value in the selected value set defines the number of enhanced control channel elements (ECCEs) in a respective one of the enhanced physical downlink control channel candidates, and
the enhanced physical downlink control channel is mapped using a plurality of second elements and ECCEs that are mapped to the plurality of second elements, the plurality of second elements constituting at least a part of one or a plurality of resource block pairs.