IRATHO Fail du to Physical Channel Failure

[dah.]

hi,

can you help me ( Idea or Documents ...) to solve the problem of high IRATHO fail ( 3G to 2G) caused by physical Channel Failure.
which parametr, Timer ... must be optimised

[Muhammad Imran Rafique]

Can you please dig out up to worst cells, we doubt you have some Co-BCCH/BSIC issues mainly.

BR/
Imran

[mobilink999]

Hi, Can you kindly furnish some more detail of problem you are facing. You can tune InterRatPhyChFailNum and penalty timer. Feel free to carry this discussion further and share your findings.

[Matulpagla]

Hi,
HO fail due to Physical channel failure could happen due to different reason. Most improtantly you are requested to do the following-

1. Check the thresholds value/trigger timers for 3G to 2G HO based on the eqipment vendor.
2. Neighbor 2G BCCH/BSIC, LAC & quality.


Thanks

[javierinfante]

hi:
I also has the same problem, but I have checked everything and I cant find a reason.
Question: does anyone knows how to find which is the 2G cell where the handover fail??. I have checked the performance of all the 2G neighbors of the 3G cell and the counters for fail incomming handover from 3G are 0, the 3G cell has a ISHO to 2G failure rate around 25% but the 2G neighbors counters are perfect.

[rfnubs]

check the source 3G cell if its no resource available to HO 2G sites

[ironheart]

Hi,

IRATHO fail here is RT or NRT? and fail from 2G -> 3G or 3G -> 2G?

hi:
I also has the same problem, but I have checked everything and I cant find a reason.
Question: does anyone knows how to find which is the 2G cell where the handover fail??. I have checked the performance of all the 2G neighbors of the 3G cell and the counters for fail incomming handover from 3G are 0, the 3G cell has a ISHO to 2G failure rate around 25% but the 2G neighbors counters are perfect.

[vivero]

Hi guys!

Here's a document that instruct how to optimize IRAT HO.
Because of the volume limitation, so I must divide it to 2 parts.
I hope it can help you. Please remember thanks and reps!
IRAT Optimization and Troubleshooting.part1.rarIRAT Optimization and Troubleshooting.part2.rar

Regards!

[faithhund]

@ Vivero!
Can you send me the doc?
My email is faithhund@yahoo.com.
@ Javier!
You can check IRAT HO cell2cell. Which vendor do you work with? If the target 2G neighbors don't have incoming fail HO, maybe your source cell HO to a fake neighbor, because you declare wrong some fake neighbors.
Thanks!

[rfsupp]

Javier,

To check the HO failures from 3G to 2G, you have to ways: By tracing (very easy at Huawei - webLMT) or counters (usually the counters cell2cell at Huawei is a little bit to query)

And if you are checked the neighbor relation issues(BCCH,LAC,BSIC and etc) try to talk to Core Team, because there exist some problem there as I already faced.
With a lot of rehoming some times they forgot to declare that a LAC e etc.