Hello to the LTE experts.
I would like to ask a question.
I have a problem due to the ping-pong handover process.
The process of ping pong handover between the two sectors is running normally, but my question is why I find 4 dB difference between the two sectors with the same eNodeB even though I am in the same position when the ping pong handover process was done.
It’s because of radio conditions and propagation. Sectors Sidelobes are weaker then main lobes and signals may fluctuate. Difference in db may vary.
Hello All.
Some 4G users move from LTE to 2G in connected mode.
When the user open data on mobile immediately go to 2G.
And back again to 4G.
And frequently go to 2G again - like ping pong handover.
How can I prevent this issue?
I tried A1 A2 threshold but still happen.
Now the area no have 3G network just 4G and 2G.
Did you try to check the signal strength of nearby cells in the measurement report reported by UE?
Yes good coverage.
Between -70 to -80 dBm.
This happens for MT call UE when it does not get paging or INVITE in DL then later it gets CS service notification to go to 2G cell and pick-up the MT call there.
CSFB.
You can disable data when user goes to 2G due to CS notification.
We observed similar issue long time ago where users would go to 2G due to CS fallback, whilst they are in 2G apps on the phone continue sending small data packets, which made the UE stuck in 2G.
Solution we came up was to disable data completely in 2G.
This would make user go into to idle mode quickly once CS call finishes and respect 4G.
Can you not do that with FastReturnToLTE parameter?
I’ve always seen a UE returning to LTE from 2G or 3G as soon as the call ends when this parameter was on.
Data is off (disable), but if the user is using VoLTE it doesn’t make any sense of ON / OFF data because we can use VoLTE service without enabling data in the phone.
Here situation is when user is using VoLTE service and making a call at that time first users is going to 2G then come back on VoLTE. Why?
Why it is going to 2G?
How VoLTE without data bearer?
LTE is always on bearer.
VoLTE is possible without data enable?
This is the difference between VoLTE and VoIP.
VoLTE you can make calls when mobile data is OFF.
While VoIP will not work.
Disable your mobile data and make a VoLTE call.
Can we also make HD calls without data enabled?
In my opinion, HD calls are dependent on codecs enabled on Core.
So if IMS supports, why not?
Hi, All expert, in this topic I would like to ask about handover pingpong between 4G and 3G becouse in my dally jobs always faced this issue in Network optimization.
Thnx
Ping-pong handover is one of the most common mobility issues in mobile networks.
It happens when a UE keeps switching between two cells again and again in a short distance or short time.
Cell A → Cell B → Cell A → Cell B
This usually means the mobility boundary is unstable.
The UE hands over from one cell to another.
Then it quickly returns to the previous cell.
This often happens near cell borders where two cells have similar signal strength.
Too many handovers create unstable mobility.
Common reasons:
In drive test logs, ping-pong handover appears as frequent serving cell changes.
Typical signs:
Ping-pong handover can cause:
The user may feel this as unstable internet even when signal bars look okay.
Before:
After:
Quick takeaway:
Ping-pong handover is a mobility stability problem.
It usually means the network boundary is too sensitive, too messy, or poorly optimized.
Good mobility is not just about strong signal.
It is about clean cell borders, correct thresholds, proper neighbors, and stable RF planning.
LinkedIn: 
A 4 dB RSRP difference between two sectors of the same eNodeB is generally normal. Although both sectors belong to the same site, they have different antenna azimuths, downtilts, and radiation patterns, so the UE can receive different signal strengths at the same location.
Additionally, radio propagation effects such as multipath fading, reflections, shadowing, and LTE measurement filtering can easily introduce a few dB variation, even when the UE is stationary.
If the 4 dB difference is leading to frequent ping-pong handovers, I would focus less on the RSRP gap itself and more on the mobility parameters. Checking the A3 offset, hysteresis, Time-to-Trigger (TTT), antenna alignment, and sector overlap will usually provide more insight into why the UE keeps switching between the two sectors.
