Hi experts,
Can anyone please tell about Inter Site CA feature from which specifications we can get details or if we are using anywhere?
What you mean by specification?
Means wheather we can get details about it from any 3gpp reference.
As far as I know ca is possible only between different layers of same sector.
So in that case no operator now using inter site ca?
Maybe is for the case when you have 2 enodeb installed in same physical location.
Related conversation: Inter-site LTE Carrier Aggregation feature 
Thanks @eta004.
Actually in am not getting this kind of reference but want to if any vendor using it or like if from any 3gpp reference we can get any further details.
Many network have inter site CA.
Including my Network.
What is eNB type? DU or Baseband?
But shouldn’t be any issue.
Just make sure both eNB Baseband and GPS installated in it.
Other it can’t work properly.
Rest just follow the feature guideline.
It’s same like Intra eNb CA.
Nothing special in terms of functionality.
Only 2 possible way:
- relaxed backhual
- coordinator like centralized BBU.
You need less than 8 ms or 16 ms delay between 2 enb based on DL UL ca and DL ca only respectively.
If Tx networking can ensure support, it can implement easily on radio (feature and parameter setting).
We are using Inter eNB Carrier aggregation.
CA between 2 physically separated eNBs.
Can you please, write name or MML command for inter site CA activation?
Also which of them has better performance Co sector or inter site?
Hi All,
Does anyone know how we can check the performance of Inter eNodeB CA?
- How we can differentiate the Inter eNB CA with Intra eNB?
- How we can check the overall impact of this feature on network? (how much improvement or reduction)
- Can we compare the KPI results with related counters?
equipment is E/// , I have created related KPI but I need a way to check the performance of this feature in terms of KPI results.
I would say you should have an increasing on SCell attempts and % of time in CA.
With a DT that would be easy to test and compare DL thrp pre and post and see better throughput on the post with more CA % of samples.
I am not an Expert insights Ericsson, so I can’t tell you which counters to check.
I am sorry for that.
You should also have more A6 being reported and more SCell HOs, I would say.
Inter-eNB CA brings throughput improvement if the X2 delay betwen sites are lower than 15-20 ms in general.
And A6 event for scell change did not bring us any benefit so we disabled it.
So do you prefer to drop the scell and add it again later on?
Yes, correct.
Interesting.
Especially with this Inter-eNB CA I would expect A6 to provide better benefits.
But apparently not.
Thanks for the info.
Inter-site CA need time synchronization with GPS.
It is costly, and effectivess of scheduling 2 carriers in overlapping area is small.
So very few inter site CA deployed