Depending on the modulation technique, each symbol stands for bits and each data point represents a different bit pattern.   QPSK, 16QAM, and 64QAM are used by LTE devices to modulate data and control information. The eNodeB supports all of these modulation techniques for the Down Link direction. However, 64QAM is optional in the Uplink direction. […]

During RRC_CONNECTED mode, if the eNodeB decides that the UE needs to perform LTE inter-frequency and inter-RAT monitoring activities, it will provide the UE with a measurement configuration which includes a monitoring gap pattern sequence. Similar mechanisms exist in UMTS (known as ‘Compressed Mode gaps’ and ‘FACH Measurement Occasions’ depending on the state and capabilities […]

Different channels are used for data to be transported through the LTE radio interface. These channels are used to separate the various types of data and allow the data to be transported across the radio network in an organized manner. Effectively the different channels provide interfaces to the higher layers within the LTE protocol structure […]