5G NSA latching issue in one site

5G NR
, ,
1

Hi Experts,
5G NSA latching issue.
NR 850 Sub6 band Ericsson system.
ENDC traffic can be seen but drive test unable to latch on it .
Acnchoring parameter are F9.
Termpoints are verified.
Drive test is able to latch on NBR 5G but not on my site.
SW: L20.Q2
Any suggestion?

2

Have you checked if UE is reporting B1 measurement or not for this site?

3

Confirm there is no pci conflict

4

No.
It’s not reporting for my site PCIs but reporting for NBR sites.

5

You said ENDC traffic can be seen.
Can you check which plane traffic is this(UP/CP)?
Which KPIs are you getting Data, Trhoughput, etc… Can you confirm?

6

From UE log the following observations:

  • Issue is still the same.
  • UE is moving from Alpha to Gamma sector on LTE layer B-66.
  • UE is getting the eventb1 thresholds from eNB on all LTE cells.
  • UE is also triggering the eventb1 multiple times on LTE cells (PCI 174 and PCI 313).
  • But in b1 threshold, UE is not sending the measurement of any of the co-located gNB PCIs (161, 333, 352). It’s sending b1 measurements for other NR PCIs.
  • And when checking scanner, all three co-located NR PCISs can be seen with very good RSRP (All in the range of Above -68 dBm)
  • So until UE sends b1 measurements for co-located gNB, NR leg addition won’t take place as it’s enabled fo co-located gNB only.

UP Traffic, Data, Trhoughput… all are there.

7

Can you verify once plmnIdlist defined at both UP and CP at gNB side under GNBCUCPFunction & GNBCUUPFunction MO?
(Specially under GNBCUCP)

1 Like
8

Do u have more than one NR band in ur network?

9

In 5G one sector is not latching how to solve