RS
Reference Signals
In the LTE E-UTRA there are various types of reference signals used in the uplink and downlink directions. In the uplink there are two types namely the Demodulation reference signal and the Sounding reference signal. In the downlink, there are three main types: Cell Specific (non-MBSFN), MBFSN (Multimedia Broadcast Multicast Service Single Frequency Network) and UE Specific.