Uplink data transmission in LTE The mapping of transport channels and UL control information (UCI) to physical channels is a task of the physical layer (PHY). Furthermore reference signals are provided by the physical layer which do not transfer any higher layer information. Logical channel mapping is provided by the MAC layer. Physical channel for … Read more
Physical Channel Types of LTE The physical layer uses resource blocks to transmit binary coded information in QPKS, 16QAM or 64QAM or OOK modulation form. Physical channels determine how data is processed and then mapped via dynamical scheduling onto resource blocks. Thus physical channels also in EUTRAN represent the available physical resources. Like transport channels, … Read more
In UL, the UE has no dedicated resources to transmit directly when new data arrived in the buffer from higher layer. It requests resources to transmit them. It receives radio resources. It transmits them. The scheduling request is sent on the Physical Uplink Control Channel (PUCCH). This channel carries radio signaling in uplink: Scheduling … Read more