How to check if a 5G log is DSS or not?

RFSpecialist · December 12, 2020, 3:00am

Hi 5G Experts,
Question: how do I verify if a 5G log is DSS or not?
What RRC layer 3 messages do I need to check?

sadanandk2 · March 13, 2021, 9:49am

From LTE only UE log or ENDC UE log?

RFSpecialist · March 13, 2021, 9:50am

EN-DC UE log.
Is it “lte-CRS-ToMatchAround:setup” to be present in NR RadioBearerConfig in case of DSS=true?

sadanandk2 · March 13, 2021, 9:51am

I think this is it.

Yes and also mbsfn subframe configuration.

Ameen · March 13, 2021, 9:51am

Check Sib2 & rrcConnectionReconfiguration message, you will get this.

sadanandk2 · March 13, 2021, 9:53am

Though it is not mandatory, most of DSS implementer would use it.

RFSpecialist · March 13, 2021, 9:55am

There are three different DSS use cases:

NR is in MBSFN
NR is in MBSFN
a. Subframes without PSS/SSS/PBCH
b. Subframes with PSS/SSS/PBCH (0 and 5)

RFSpecialist · March 13, 2021, 9:55am

SIB2 in LTE you mean?

Ameen · March 13, 2021, 9:56am

Yes.
And SCellToAddMod IE in RRCconnectionreconfiguration message before this check UE capability to verify UE supports ESS or not.

sadanandk2 · March 13, 2021, 10:01am

Case 2b cannot be used.

sadanandk2 · March 13, 2021, 10:05am

This IE is for CA.

Ameen · March 13, 2021, 10:08am

Yes, normal.

RFSpecialist · March 13, 2021, 10:09am

Another IE that indicates that DSS=true is presence of “frequencyShift7p5KHz” in the NR messages.

Ameen · March 13, 2021, 10:09am

Yes but its not mandatory for all NR bands right.

RFSpecialist · March 13, 2021, 10:09am

DSS is well explained in “5G in Bullets”, starting page 574.

Mayur_Dhakan · May 22, 2021, 12:57am

If you have any screen shot then can you please share with me I didn’t found this DSS message in my UE, ( But my UE capability show device support DSS ).

pradeep · May 22, 2021, 9:57am

This should cover your needs.

NR_Engr · August 15, 2021, 2:50pm

i can’t find in NR signaling using Nemo. please help.