Creating pipes in C using “popen()” and “pclose()” system call in Linux
Using popen() and pclose() system calls, it is fairy easy to create pipes. Function prototype for popen() FILE *popen ( char *command, char…
Creating pipes in C using pipe() system call in Linux
In this chapter we shall use “pipe()” system call. Syntax for “pipe()” int pipe(int fd[2]); Here: pipe() returns 0 on…
Half duplex Linux/Unix pipes Introduction
* A pipe is a method of connecting standard output of one process to a standard input of another process. * Pipes are one of the oldest IPC…
5G NR RACH process – Msg3/4 and Contention Resolution
Msg3 and Msg4 are used for contention resolution. The uplink time synchronization are completed in Msg1 and Msg2. The purpose of Msg3 and Msg4…
5G NR RACH process – Msg2
This is the 2nd step in RACH procedure. In this chapter we shall understand below 2 points: 1. How does a UE receive Msg2 ? 2. What are the…
5G NR RACH process – Msg1 – RA-RNTI calculation and Power control
Once the RACH configuration and preambles are selected, it is to be sent out to the available PRACH occasion. For that RA-RNTI is to be…
5G NR RACH process – Msg1 – Generation PRACH Preamble
In previous 2 chapters, we had a a brief of RACH procedure. In the next chapters we shall have indepth understanding of all the messages. In…
5G NR Random Access Resource Selection
In this chapter we shall see where the UE can get the resources for PRACH transmission. Before UE can send a PRACH, it needs to select an SSB…
5G NR 4 step RACH procedure in brief
In this chapter we will look into Rel-15 RACH procedure in brief. In upcoming chapters we shall have a look indetail about the message…
5G NR: Different Types of RACH procedures and triggers for RACH procedure
RACH: Random Access procedure is used for uplink synchronization and RRC Connection. UE will get downlink synchronization after successfully…