Base station, terminal, transmission method, and reception method
Disclosed is a base station capable of appropriately configuring a resource on which EPDCCH is located when soft combining is applied. The base station includes configuration section ( 102 ) that configures an EPDCCH set in a plurality of subframes, the EPDCCH set being formed of ECCEs to which control information (assignment information) transmitted over the plurality of subframes is assigned; and an assignment section ( 105 ) that assigns the control information to any of the ECCEs in each of the plurality of subframes.
1. A base station comprising:
a configuration section that configures an Enhanced Physical Downlink Control Channel (EPDCCH) set in a plurality of subframes, the EPDCCH set being formed of Enhanced Control Channel Elements (ECCEs) to which control information transmitted over the plurality of subframes is assigned; and
an assignment section that assigns the control information to any of the ECCEs on a Physical Resource Block (PRB) pair in each of the plurality of subframes.
2. The base station according to claim 1 , wherein
the configuration section configures the EPDCCH sets respectively in the plurality of subframes, and
the assignment section divides the control information into the same number of pieces of control information as the number of the plurality of subframes in units of the ECCEs and assigns each of the divided pieces of control information to any of the ECCEs forming the EPDCCH sets configured respectively in the plurality of subframes.
3. The base station according to claim 2 , wherein the EPDCCH sets configured respectively in the plurality of subframes are the same.
4. The base station according to claim 2 , wherein the EPDCCH sets configured respectively in the plurality of subframes are different.
5. The base station according to claim 1 , wherein the configuration section configures the single EPDCCH set entirely for the plurality of subframes, and PRB pairs corresponding to the ECCEs forming the single EPDCCH set are distributedly located in the plurality of subframes.
6. The base station according to claim 1 , wherein the assignment section assigns downlink data to the last subframe among the plurality of subframes, the assignment of the downlink data being indicated by the control information.
7. The base station according to claim 1 , further comprising a reception section that receives response signals for downlink data on a Physical Uplink Control Channel (PUCCH) associated with the ECCE located in a subframe to which the downlink data is assigned among the plurality of subframes, the assignment of the downlink data being indicated by the control information.
8. The base station according to claim 1 , wherein
a transmission subframe for the control information indicating assignment of uplink data is associated with a reception subframe for the uplink data, and the last subframe among the plurality of subframes is the same as the transmission sub frame.
9. A terminal comprising:
a configuration section that identifies Enhanced Control Channel Elements (ECCEs) to which control information transmitted over a plurality of subframes is assigned, the ECCEs forming an Enhanced Physical Downlink Control Channel (EPDCCH) set configured in the plurality of subframes; and
a reception section that receives the control information assigned to any of the ECCEs on a Physical Resource Block (PRB) pair in each of the plurality of subframes.
10. A transmission method comprising:
configuring an Enhanced Physical Downlink Control Channel (EPDCCH) set in a plurality of subframes, the EPDCCH set being formed of Enhanced Control Channel Elements (ECCEs) to which control information transmitted over the plurality of subframes is assigned; and
transmitting the control information assigned to any of the ECCEs on a Physical Resource Block (PRB) pair in each of the plurality of subframes.
11. A reception method comprising:
identifying Enhanced Control Channel Elements (ECCEs) to which control information transmitted over a plurality of subframes is assigned, the ECCEs forming an Enhanced Physical Downlink Control Channel (EPDCCH) set configured in the plurality of subframes; and
receiving the control information assigned to any of the ECCEs on a Physical Resource Block (PRB) pair in each of the plurality of subframes.