Optimizing UE Registration Time on Private 5G SA Network with RG501Q-EU

IoT Modules 5G Module
1

Hi

We are working with the Quectel RG501Q-EU module in a private 5G SA network environment where we have full control and knowledge of the network parameters, including:

  • PLMN ID
  • APN
  • Operating band (n40)
  • SSB ARFCNs
  • Cell IDs and PCI

Our goal is to minimize the time it takes for the UE to register on the network. So far, we have applied the following AT command configurations to streamline the registration process:

  1. Limit to 5G SA band n40 only:
    AT+QNWPREFCFG="nr5g_band",40
  2. Disable all other RATs (UMTS, LTE, 5G NSA):
AT+QNWPREFCFG="gw_band",0  
AT+QNWPREFCFG="lte_band",0  
AT+QNWPREFCFG="nsa_nr5g_band",0
  1. Set 5G as preferred mode:
    AT+QNWPREFCFG="mode_pref",NR5G
  2. Restrict preferred frequency list to known SSB ARFCNs:
    AT+QNWCFG="nr5g_pref_freq_list",<list>
  3. Lock to specific ARFCNs (EARFCN lock):
    AT+QNWCFG="nr5g_earfcn_lock",<list>

These changes have significantly reduced the registration time. However, we are looking to optimize it even further.

Questions:

  • Are there any additional AT commands or configurations that could help reduce registration time even more?
  • Is there a way to preload or prioritize known cell IDs or PCI values to speed up cell selection?
  • Are there any Quectel-specific optimizations or undocumented features that could assist in this use case?

Any insights or shared experiences would be greatly appreciated!

2

Dear @palfaro
If SA network, you can disable NSA mode.
Actually, for your configurations, it used for testing.
We have a test AT command to lock, just for testing. I will send to you via Message, please note it can’t use for commercial.