Hi NR Experts.
Anyone having idea What is conditional pscell change?
What are criteria for it?
It’s part of r16.
CPC change executed by UE when execution condition met.
UE start evaluating execution condition upon receiving CPC configuration and stop evaluating the execution condition once PScell change is triggered.
Only intra SN CPC is supported.
An execution condition consist if one or 2 triggering condition (CPC event A3 or A5).
Thanks. Is it different from A3/A5 based PScell change?
A5 corresponds to ‘SpCell becomes worse than threshold1 and neighbour becomes better than threshold2
A3 corresponds to ‘Neighbour becomes Offset better than Special Cell’
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Hi NSA/NR Experts.
In what conditions srb3 is established?
And what are details of conditional pscell change feature? How it works?
If UE supports, it establishes, (ofc at gnb it has to be enabled).
Enabling it improves HOSR due to reduced latency.
Some phones might have compatibility issues, still.
You can understand that if UE repeatedly make conn attemps.
In UE capability: srb3 supported under generalParameterSMRDC.
Srb3 is not a mandatory feature?
No.
5G devices sends and received RRC msg from anchoring 4G.
4G sends to gNB.
Thanks.
Is it parameter controlled only?
I mean only switch to turn it on?
Not dependent on any condition like UE buffer data, gNB buffer data etc.?
Nope, it’s for signalling.
Just a switch and UE support is needed.
Thanks. What about split srb1, is it mandatory?
Could you please tell if srb3 is a commonly supported feature or it is supported only in some of the high end smartphones?
No.
srb3 can work without srb1/2 split.
It is supported mainly at Qualcomm chipsets.
I checked before Iphone UE cap but never really drilled down in signalling for it.
I agree. Just wanted to understand about split srb1.
Thanks for your response. Much appreciated.
One last question: have you ever seen any device supporting cross carrier scheduling?
No, but I guess it is for SA devices.
In the link there is pretty good info I might say.