What is MPDCCH (MTC physical downlink control channel)?

MTC physical downlink control channel intended for data transmission decreased activity. MPDCCH can be sent a single time or communicated with repetition. MPDCCH conveys common and UE-specific signalling. MPDCCHs are formed by aggregation of enhanced control channel elements(eCCE), each eCCE comprises a bunch of resource components. An MPDCCH can utilize either localized or distributed transmission.