Adapting a number of aggregation levels for control channel elements
Methods and apparatuses are provided for a User Equipment (UE) to receive control information. A Downlink Control Information (DCI) format to be monitored is identified. A number of Enhanced Physical Downlink Control Channel (EPDCCH) candidates are identified based on the identified DCI format. Control information is received based on the identified number of EPDCCH candidates.
1. A method for a user equipment (UE) to receive control information, comprising:
identifying a downlink control information (DCI) format to be monitored;
identifying a number of enhanced physical downlink control channel (EPDCCH) candidates based on the identified DCI format and a number of physical resource block (PRB) pairs; and
receiving control information based on the identified number of EPDCCH candidates.
2. The method of claim 1 , wherein the number of PRB pairs is configured to the UE.
3. The method of claim 1 , wherein the identified number of EPDCCH candidates comprises a UE-specific search space.
4. The method of claim 1 , wherein a subframe or a set of subframes for an EPDCCH is configured to the UE.
5. A method for a base station to transmit control information, comprising:
transmitting control information,
wherein the control information is received by a user equipment (UE) based on a number of enhanced physical downlink control channel (EPDCCH) candidates, and
wherein the number of EPDCCH candidates is identified by the UE based on a downlink control information (DCI) format to be monitored and a number of physical resource block (PRB) pairs.
6. The method of claim 5 , wherein the number of PRB pairs is configured to the UE.
7. The method of claim 5 , wherein the number of EPDCCH candidates comprises a UE-specific search space.
8. The method of claim 5 , wherein a subframe or a set of subframes for an EPDCCH is configured to the UE.
9. A user equipment (UE) to receive control information, comprising:
a controller configured to identify a downlink control information (DCI) format to be monitored, and identify a number of enhanced physical downlink control channel (EPDCCH) candidates based on the identified DCI format and a number of physical resource block (PRB) pairs; and
a transceiver configured to receive control information based on the identified number of EPDCCH candidates.
10. The UE of claim 9 , wherein the number of PRB pairs is configured to the UE.
11. The UE of claim 9 , wherein the identified number of EPDCCH candidates comprises a UE-specific search space.
12. The UE of claim 9 , wherein a subframe or a set of subframes for an EPDCCH is configured to the UE.
13. A base station to transmit control information, comprising:
a transceiver configured to transmit control information,
wherein the control information is received by a user equipment (UE) based on a number of enhanced physical downlink control channel (EPDCCH) candidates, and
wherein the number of EPDCCH candidates is identified by the UE based on a downlink control information (DCI) format to be monitored and a number of physical resource block (PRB) pairs.
14. The base station of claim 13 , wherein the number of PRB pairs is configured to the UE.
15. The base station of claim 13 , wherein the number of EPDCCH candidates comprises a UE-specific search space.
16. The base station of claim 13 , wherein a subframe or a set of subframes for an EPDCCH is configured to the UE.