PUCCH resource determination for EPDCCH

摘要

Methods, systems, and devices are described for indexing control channel elements to determine uplink channel resources. Downlink control messages may be monitored in a set of downlink subframes. The monitoring may include monitoring physical downlink control channel (PDCCH) messages in at least one of the subframes and monitoring enhanced physical downlink control channel (EPDCCH) messages in at least one of the subframes. A downlink control message may be received in at least one subframe. The downlink control message may include an EPDCCH message. An index for enhanced control channel elements (ECCEs) may be determined based at least in part on the set of downlink subframes. The determined index of the ECCEs may be used to identify uplink control channel resources. The ECCEs may be indexed in a manner that is specific to a cell in a wireless communication system, or which is configured for a particular mobile device.

主权项

1. A method of indexing control channel elements in wireless communications, comprising:
monitoring for downlink control messages in a set of downlink subframes, wherein at least one subframe in the set of downlink subframes is configured for physical downlink control channel (PDCCH) messages and at least one subframe in the set of downlink subframes is configured for enhanced physical downlink control channel (EPDCCH) messages; indexing enhanced control channel elements (ECCEs) across each subframe in the set of downlink subframes, wherein the ECCEs are indexed in a continuous manner across each subframe in the set of downlink subframes including subframes for which PDCCH is monitored and subframes for which EPDCCH is monitored, and wherein the ECCE indexing is based on a total number of subframes in the set of downlink subframes; receiving a downlink control message in at least one subframe in the set of downlink subframes, the downlink control message comprising an EPDCCH message; determining an ECCE index associated with the received downlink control message comprising the EPDCCH message; identifying uplink control channel resources based at least in part on the determined ECCE index; and transmitting an acknowledgement/negative acknowledgement (ACK/NACK) indication associated with the received downlink control message comprising the EPDCCH message on the identified uplink control channel resources.