Patent ID: 9252918
Filing Date: 2016-02-02
CPC Classification: H04L

Claim Text:
1. A method in a user equipment (UE) for receiving control information, the method comprising: monitoring control channel candidates using common reference signals (CRS) and monitoring enhanced control channel candidates using demodulation reference signals (DMRS) when the UE is configured in a first transmission mode for receiving a downlink shared traffic channel based on DMRS; monitoring control channel candidates only using CRS when the UE is configured in a second transmission mode for receiving a downlink shared traffic channel based on CRS; and receiving downlink control information (DCI) in a subframe in one of the monitored control channel candidates or enhanced control channel candidates in the subframe, wherein monitoring control channel candidates using CRS further comprises monitoring Physical Downlink Control Channel (PDCCH) candidates, wherein monitoring enhanced control channel candidates using DMRS further comprises monitoring Enhanced Physical Downlink Control Channel (EPDCCH) candidates, and wherein the downlink shared traffic channel is a Physical Downlink Shared Channel (PDSCH), and wherein monitoring the EPDCCH candidates comprises: monitoring a set of EPDCCH candidates in the subframe; monitoring a first subset of the set of EPDCCH candidates at a first set of aggregation levels in a first slot of the subframe; and monitoring a second subset of the set of EPDCCH candidates at a second set of aggregation levels in a second slot of the subframe, wherein the second set of aggregation levels is different from the first set of aggregation levels.