Handover Failure: N200 Timeout

[chronix_ray]

Hi,

Do you experience a handover failure with N200 timeout reason. I checked in the logs that before the handover failure event, there is a

DL Event report: Datalink Failure: DL Event: N200_Timeout.

Handover failure: Layer 2 Failure

Anyone knows what cause this and how to check.

Thanks.

[shahram]

check your transmission of the site if you see a lot of this reason (T200 expired) in your drive test

[dtvt2]

1. check same BSIC+BCCH
2. Check interference
3. check HW fail
4. if error occur in wide area. and Drop call high. check BSC synchronization

[atlilar]

If handover is not occur n200 time, fails and come back to cell.
bcch and tch interferance check.

[chronix_ray]

That is why intracell handover occurs?

[Ahmed.]

I am not so sure about this N200 HO failure thing but I remember an E******* site that had frequent T200 failures & call drops.

1. The cell was showing excessive 'suddenly lost connection' drops.
2. The site was VSAT, all VSAT were showing a lot of T200 expiry.

[ventinel]

this can also be due to poor C/I at radio end... MS unable to access the channel

Hi,

Do you experience a handover failure with N200 timeout reason. I checked in the logs that before the handover failure event, there is a

DL Event report: Datalink Failure: DL Event: N200_Timeout.

Handover failure: Layer 2 Failure

Anyone knows what cause this and how to check.

Thanks.