Posts

Showing posts from September, 2022

Ran Protocol Stack Overview (Part-1)

Image
 Lets have a look on Ran Protocol Stack. NOTE : This Part only give the overview of RAN Protocol Stack and we will go deep in the subsequents parts. We have seen from the above image that there are two types of RAN Protocol Stack: User-Plane Protocol Stack Control-Plane Protocol Stack Each layer which are shown in the diagram uses the information from the below layer and provides services to the above layer. (Both in User Plane and Control Plane Protocol Stack). In User Plane Protocol Stack information is communicate between the User Equipment (UE) and gNB( 5G RAN). RAN-Random Access Network. In Control Plane Protocol Stack information is communicate between the User Equipment and gNB and the Core-network. First Discuss about the layers of User-Plane Protocol Stack   SDAP ( Service Data Adaptation Protocol ) - This layer is responsible for QoS (Quality Of Service) Flow Handling . PDCP ( Packet Data Convergence Protocol ) - This layer is responsible for Header Compression,In Sequen

5G NR Frame Structure

Image
 Let's Have a look on 5g NR(New Radio) Frame Structure. Introduction In   5G NR , each frames has a time durations of 10 ms and frame are nothing but one segment of the data which is intend to send from sender(source) to receiver(destination). Now , each frame compromises of 10 subframes , which gives us the duration of each subframe which is about 1 ms. After frame are divided into subframe , now each subframe are divided into slots , whose number is depend on the numerology formula (2^ µ ) and  µ  has a range from zero to four . Lets have a look what does it really mean. As slots number are depend on the 2^ µ  and if we take  µ 's value as zero, we get 2^ µ  as 1, this means here each subframe divided into one  slot . Similarly for  µ's  value as 1, we get 2^ µ  as 2,now each subframe divided into two slots . Same procedure for the rest  µ's  value. Below image give you a diagrammatic overview about what we have discussed above. For the sake, only see the first