Processing overlapping EPDCCH resource sets

Abstract

A method of wireless communication is presented. The method includes determining whether decoding candidates for enhanced control channel resource sets overlap. The method further includes determining uplink resources based on a predefined rule when the decoding candidates overlap.

What is claimed is: 
     
       1. A method of wireless communication, comprising:
 determining whether a first decoding candidate for a first enhanced control channel resource set is a same decoding candidate as a second decoding candidate for a second enhanced control channel resource set, the first decoding candidate and the second decoding candidate being decoding candidates from a plurality of decoding candidates; 
 determining uplink resources based at least in part on a predefined rule when the decoding candidate is the same for the first enhanced control channel resource set and the second enhanced control channel resource set, the predefined rule indicating that the uplink resources are determined based at least in part on:
 an initial uplink offset, an initial enhanced control channel element (ECCE) index, or a combination thereof of the first enhanced control channel resource set; or 
 an initial uplink offset, an initial ECCE index, or a combination thereof of the second enhanced control channel resource set; and 
 
 transmitting at least an acknowledgement (ACK) or a negative acknowledgement (NAK), via the determined uplink resources, for downlink transmissions associated with one of the enhanced control channel resource sets. 
 
     
     
       2. The method of  claim 1 , in which the predefined rule indicates that the uplink resources are determined based at least in part on the initial enhanced control channel element (ECCE) index of the first enhanced control channel resource set. 
     
     
       3. The method of  claim 1 , in which the first enhanced control channel resource set and the second enhanced control channel resource set are configured specifically for a user equipment. 
     
     
       4. The method of  claim 1 , in which the initial uplink offset is configured separately for each enhanced control channel resource set. 
     
     
       5. The method of  claim 1 , in which the uplink resources are determined for only a same downlink control information payload size. 
     
     
       6. The method of  claim 1 , in which the uplink resources are determined when a same virtual cell ID is configured for the first enhanced control channel resource set and the second enhanced control channel resource set. 
     
     
       7. The method of  claim 1 , in which the plurality of decoding candidates are mapped to a same set of resource elements. 
     
     
       8. The method of  claim 1 , in which each enhanced control channel resource set is configured with a localized transmission mode or a distributed transmission mode. 
     
     
       9. The method of  claim 1 , in which each enhanced control channel resource set is associated with a user equipment specific search space or a common search space. 
     
     
       10. An apparatus for wireless communications, comprising:
 a memory; and 
 at least one processor coupled to the memory, the at least one processor being configured:
 to determine whether a first decoding candidate for a first enhanced control channel resource set is a same decoding candidate as a second decoding candidate for a second enhanced control channel resource set, the first decoding candidate and the second decoding candidate being decoding candidates from a plurality of decoding candidates; 
 
 to determine uplink resources based at least in part on a predefined rule when the decoding candidate is the same for the first enhanced control channel resource set and the second enhanced control channel resource set, the predefined rule indicating that the uplink resources are determined based at least in part on:
 an initial uplink offset, an initial enhanced control channel element (ECCE) index, or a combination thereof of the first enhanced control channel resource set; or 
 an initial uplink offset, an initial ECCE index, or a combination thereof of the second enhanced control channel resource set; and 
 to transmit at least an acknowledgement (ACK) or a negative acknowledgement (NAK), via the determined uplink resources, for downlink transmissions associated with one of the enhanced control channel resource sets. 
 
 
     
     
       11. The apparatus of  claim 10 , in which the predefined rule indicates that the uplink resources are determined based at least in part on the initial enhanced control channel element (ECCE) index of the first enhanced control channel resource set. 
     
     
       12. The apparatus of  claim 10 , in which the first enhanced control channel resource set and the second enhanced control channel resource set are configured specifically for a user equipment. 
     
     
       13. The apparatus of  claim 10 , in which the initial uplink offset is configured separately for each enhanced control channel resource set. 
     
     
       14. The apparatus of  claim 10 , in which the at least one processor is further configured to determine the uplink resource for only a same downlink control information payload size. 
     
     
       15. The apparatus of  claim 10 , in which the at least one processor is further configured to determine the uplink resources when a same virtual cell ID is configured for the first enhanced control channel resource set and the second enhanced control channel resource set. 
     
     
       16. The apparatus of  claim 10 , in which the plurality of decoding candidates are mapped to a same set of resource elements. 
     
     
       17. The apparatus of  claim 10 , in which each enhanced control channel resource set is configured with a localized transmission mode or a distributed transmission mode. 
     
     
       18. The apparatus of  claim 10 , in which each enhanced control channel resource set is associated with a user equipment specific search space or a common search space. 
     
     
       19. An apparatus for wireless communications, comprising:
 means for determining whether a first decoding candidate for a first enhanced control channel resource set is a same decoding candidate as a second decoding candidate for a second enhanced control channel resource set, the first decoding candidate and the second decoding candidate being decoding candidates from a plurality of decoding candidates; 
 means for determining uplink resources based at least in part on a predefined rule when the decoding candidate is the same for the first enhanced control channel resource set and the second enhanced control channel resource set, the predefined rule indicating that the uplink resources are determined based at least in part on:
 an initial uplink offset, an initial enhanced control channel element (ECCE) index, or a combination thereof of the first enhanced control channel resource set; or 
 an initial uplink offset, an initial ECCE index, or a combination thereof of the second enhanced control channel resource set; and 
 
 means for transmitting at least an acknowledgement (ACK) or a negative acknowledgement (NAK), via the determined uplink resources, for downlink transmissions associated with one of the enhanced control channel resource sets. 
 
     
     
       20. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:
 program code to determine whether a first decoding candidate for a first enhanced control channel resource set is a same decoding candidate as a second decoding candidate for a second enhanced control channel resource set, the first decoding candidate and the second decoding candidate being decoding candidates from a plurality of decoding candidates; 
 program code to determine uplink resources based at least in part on a predefined rule when the decoding candidate is the same for the first enhanced control channel resource set and the second enhanced control channel resource set, the predefined rule indicating that the uplink resources are determined based at least in part on: 
 an initial uplink offset, an initial enhanced control channel element (ECCE) index, or a combination thereof of the first enhanced control channel resource set; or 
 an initial uplink offset, an initial ECCE index, or a combination thereof of the second enhanced control channel resource set; and 
 program code to transmit at least an acknowledgement (ACK) or a negative acknowledgement (NAK), via the determined uplink resources, for downlink transmissions associated with one of the enhanced control channel resource sets.