-
Member
Reputation: 255
2G/3G same LAC
Dears,
would you please share your experience in the below points:
1- Is this logic to have same LAC in 2G cells & 3G cells if they are connected to same core?
2- If Q1 answer is yes, will this reduce paging loss "mobile out of service" during 3g<>2G re-selection?
thanks.
regards,
-
2011-03-28 07:05 PM
# ADS
Circuit advertisement
-
Re: 2G/3G same LAC
Originally Posted by
sala70vic
Dears,
would you please share your experience in the below points:
1- Is this logic to have same LAC in 2G cells & 3G cells if they are connected to same core?
2- If Q1 answer is yes, will this reduce paging loss "mobile out of service" during 3g<>2G re-selection?
thanks.
regards,
1. yes
2. yes
it has been talked about:
http://www.finetopix.com/live-optimi...een-2g-3g.html
br
s52d
-
Member
Reputation: 255
Re: 2G/3G same LAC
Originally Posted by
s52d
Hi,
Thanks for your reply, have you any report, test case, KPIs, showing the impact of common LA?
Currently our Paging Success rate around 90% (3G).
thanks.
regards,
-
Re: 2G/3G same LAC
Originally Posted by
sala70vic
Hi,
Thanks for your reply, have you any report, test case, KPIs, showing the impact of common LA?
Currently our Paging Success rate around 90% (3G).
thanks.
regards,
Hi!
To summarize: by having common LA, you:
1. reduce signalling (less LAU, less battery consuption)
2. less missed calls complains
3. huge benefit for small number of terminals where BOTH RANs are very weak
Some prerequisites:
- common VLR
- core people capable of defining it properly ;-). Remember, it is core!
- no silly national roaming agreements preventing it
- no differentiation between users (GSM only SIM, UTRAN only SIM etc)
Test case: do it in small region and test. It is easy to do, if you have common VLR.
Please note: it can not be done on PS domain (no common RA).
test: monitor LAU stats, paging.
paging KPIs: as those cases are rare, you will not notice big change.
It is lost in noise (not statistically significant).
But you will notice less "5 bars and then I got missed call SMS" complains.
We did trial:
Terminal with capability to force RAT change.
At the same time:
- dial number of the terminal
- force terminal into another RAT
When different VLR: 100 % paging failure
When common LA: 100 % paging success
Your 90%? Are you sure? My first guess is: voice pages OK, but aggressive retries with SMSes.
Try to get separate stats for real (voice) MT calls and SMS deliveries.
BR
s52d
Bookmarks