Category: Cellular Communication
-
Dual connectivity is a 5G feature that lets your phone connect to two cell towers at the same time. Dual connectivity makes 5G rollout smoother and easier.
-
Your phone needs to check CSI-RS signal regularly to keep track of the channel conditions. Just like a train schedule tells you exactly when your train arrives, a smart timing offset tells your phone when to check the CSI-RS signal. Let us explore that concept a bit.
-
Your phone locates PDCCH in the vast ocean of Time and Frequency using Search Space and CORESET. Welcome to the world of treasure hunt.
-
Uplink Power Control adjusts your phone’s transmit power so that the base station receives signals at just the right strength. Think of it like adjusting your voice in a conversation—if you’re close, you speak softly; if you’re far away or in a noisy room, you speak louder. Let’s try to understand this concept in a…
-
Link adaptation is how a 4G or 5G tower resizes each data packet to fit your signal: the phone reports a CQI, the tower picks an MCS. With delivery trucks.
-
RACH (Random Access Channel) is the four-message handshake your phone uses to get a 5G tower’s attention and get online. Explained with a party analogy.
-
In this post I will explain the major physical entities in cellular communication, in an easy to understand way. Understanding it helps you appreciate how these systems work together to keep you connected.