5G NR RACH procedure

Hello,

Is RACH procedure implemented in the toolbox? If so, what are the classes that defines random access functionality? Does it support 4-way handshake or/and 2-way RACH enhancement in R16?

Answer 1

[Animesh]

Hi Sachitha,

I understand that you want to know how RACH is implemented in the MATLAB’s 5G Toolbox.

There are different RACH formats available. The RACH procedure here supports a 4-way handshake as briefly described below:

1. The UE makes its presence known to the network by sending a RACH.
2. The gNodeB replies by sending a RACH access response carried by the PDSCH.
3. The response to the RACH access response is a contention resolution message. It is sent via the PUSCH or data-carrying channel.
4. In the final step, the gNodeB acknowledges the contention resolution message by sending back the device identity.

Please refer to 5G_NR_webinar for more information on Initial Acquisition procedures in 5G NR.

Please refer to RACH documentation for future reference.

Please refer to 5G NR PRACH for an example implementation of 5G NR PRACH.

Please refer to 5G Toolbox for further assistance.