Resources for monitoring an EPDCCH depending on transmission mode
A base station is configured to communicate with a terminal using a resource element configured of an area in the frequency direction and an area in the temporal direction, and a resource block pair configured of a predetermined number of the resource elements. The base station includes: a second control channel generating unit configured to generate a second control channel which can be mapped to a second control channel area which is an area different from a first control channel area where a first control channel can be mapped, and which is set to the terminal from the base station in units of the resource block pair. A resource element group which is a group of the predetermined resource elements in the resource block pair of the second control channel area is configured, and the second control channel is mapped to a plurality of the resource element groups.
1. A base station apparatus configured to communicate with a terminal apparatus, the base station apparatus comprising:
a higher layer processor configured or programmed to configure a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and
a transmitter configured to transmit the enhanced physical downlink control channel using one or more resources; wherein
the resource block set includes a plurality of resource block pairs;
each of the plurality of resource block pairs includes numbered resource element groups;
the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;
for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;
for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and
N and M have equal integer values.
2. The base station apparatus according to claim 1 , wherein each of the numbered resource element groups is constituted by resource elements having a resource element group number.
3. The base station apparatus according to claim 1 , wherein the enhanced physical downlink control channel is transmitted using a resource element to which at least a cell-specific reference signal or a channel state information reference signal is not mapped.
4. The base station apparatus according to claim 1 , wherein the enhanced physical downlink control channel is transmitted using an OFDM symbol different from an OFDM symbol to be used for transmission of a physical downlink control channel.
5. The base station apparatus according to claim 1 , wherein the enhanced physical downlink control channel is transmitted using a second antenna port different from a first antenna port to be used for transmission of a physical downlink control channel;
and wherein the first antenna port is an antenna port to be used for transmission of a cell-specific reference signal, and the second antenna port is an antenna port to be used for transmission of a demodulation reference signal.
6. A terminal apparatus configured to communicate with a base station apparatus, the terminal apparatus comprising:
a higher layer processor configured or programmed to configure a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and
a control channel processor configured or programmed to monitor a candidate of the enhanced physical downlink control channel on one or more resources; wherein
the resource block set includes a plurality of resource block pairs;
each of the plurality of resource block pairs includes numbered resource element groups;
the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;
for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;
for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and
N and M have equal integer values.
7. The terminal apparatus according to claim 6 , wherein each of the numbered resource element groups is constituted by resource elements having a resource element group number.
8. The terminal apparatus according to claim 6 , wherein the enhanced physical downlink control channel is transmitted using a resource element to which at least a cell-specific reference signal or a channel state information reference signal is not mapped.
9. The terminal apparatus according to claim 6 , wherein the enhanced physical downlink control channel is transmitted using an OFDM symbol different from an OFDM symbol to be used for transmission of a physical downlink control channel.
10. The terminal apparatus according to claim 6 , wherein the enhanced physical downlink control channel is transmitted using a second antenna port different from a first antenna port to be used for transmission of a physical downlink control channel;
and wherein the first antenna port is an antenna port to be used for transmission of a cell-specific reference signal, and the second antenna port is an antenna port to be used for transmission of a demodulation reference signal.
11. A communication method of a base station apparatus configured to communicate with a terminal apparatus, the method comprising:
a step for configuring a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and
a step for transmitting the enhanced physical downlink control channel using one or more resources; wherein
the resource block set includes a plurality of resource block pairs;
each of the plurality of resource block pairs includes numbered resource element groups;
the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;
for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair of the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;
for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and
N and M have equal integer values.
12. A communication method of a terminal apparatus configured to communicate with a base station apparatus, the method comprising:
a step for a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and
a step for monitoring a candidate of the enhanced physical downlink control channel on one or more resources; wherein
the resource block set includes a plurality of resource block pairs;
each of the plurality of resource block pairs includes numbered resource element groups;
the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;
for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;
for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and
N and M have equal integer values.