LTE : Data Transmission in DL In Long-Term Evolution (LTE), data transmission in the Downlink (DL) involves the transfer of user data from the Evolved NodeB (eNB) to the User Equipment (UE). The LTE DL is designed to provide high data rates, low latency, and efficient spectrum utilization. Here’s an overview of the key aspects … Read more
How Downlink Control Information or DCI in LTE? DCI serves as a means of communication from the network infrastructure (eNodeB) to the user equipment (UE), providing essential instructions and information for efficient downlink data transmission. This information includes details about resource allocation, modulation schemes, transmission power control, and more, enabling UEs to accurately decode and … 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
The DL scheduler is spit into 3 functional parts: 1.The Static Scheduler: Which assigns a fixed amount of Transport Blocks as well as PDCCH and PDSCH resources for the BCCH over the DL-SCH Transport Channel.Those resources are permanently allocated. 2.The Semi-static Scheduler: Which assigns Transport Blocks as well as PDCCH and PDSCH resources for PCCH … Read more
The PDCCH, Physical Downlink Control Channel, allocates the DL and UL resources. There is one PDCCH per sub-frame. It helps the UE retrieve the transport blocks from the PDSCH: Allocated RB Modulation and Coding Scheme (MCS) Multi-antenna transmission PDCCH Shared between all UE of the cell Each TTI contains an aggregation of PDCCH allowing … Read more
These UE categories are often referred to as UE classes. The low end UE does not support MIMO but the high end UE will support 4×4 MIMO Whatever category a UE belongs to, it has to be capable of receiving transmissions from up to four antenna ports. This is because the system information can be … Read more