This post describes the operation of the MTC Physical Downlink Control Channel (MPDCCH) for sending downlink assignments and uplink grants to the client device. Purpose of the MPDCCH In LTE-M, radio resources assignments (the times and frequencies when a device is expected to receive or transmit) are dynamic, for both downlink (“DL”, network to device) and uplink (“UL”, device to network). Every bandwidth allocation covers a period of one subframe (which is 1 millisecond) and every bandwidth allocation is assigned independently. We need a special control channel to carry this control information that is moving in the downlink direction, which …

The MPDCCH in LTE-M Read More »