RE: High call setup time compared to our competitor

[leelio]

Greetings experts,

in our network, we have been facing problem of having long (high) call setup time when we are initiating a call (2g) as to compared to our competitor network. if the problem could be on bss side, what might be a problem? and if is on core side, what should we be looking for?

thnx&rgds,
Leelio.

[leelio]

Hello experts,
can someone assist on this?

[awacs]

Greetings experts,

in our network, we have been facing problem of having long (high) call setup time when we are initiating a call (2g) as to compared to our competitor network. if the problem could be on bss side, what might be a problem? and if is on core side, what should we be looking for?

thnx&rgds,
Leelio.


Authentication is allowed?Check your paging parameters

[Shakeel_15]

Hi,

Check also your SDCCH mean holding time.


BR

Hello experts,
can someone assist on this?

[RF engineer]

Greetings experts,

in our network, we have been facing problem of having long (high) call setup time when we are initiating a call (2g) as to compared to our competitor network. if the problem could be on bss side, what might be a problem? and if is on core side, what should we be looking for?

thnx&rgds,
Leelio.

which vendor u using
BR
RF

[kb.jayadev]

Is this for a single site or for the whole area? If this is for a sinle sector, please check the SDCCH block %, drop% for the sector. If it is high, then there may be high setup time required.

[leelio]

thanks guys,
this problem appear to the whole network,our vendor-********

[zhanglw268]

To compare the different vendors for call setup time.

1). you have to have same procedures at the MSC side for ciphering, authentication etc.
2). Similar processor at MSC etc. handling similar traffic
3). At the Radio side, you need to have similar transmissions for E1s etc. to the BTS side, the retransmission time at the E1s will also add the call setup times
4). Same BTS configurations and features, like you shall NOT have TCH queueing (Mobile stays on SDCCH waiting for TCH) but the live network may use queueing feature
5). Similar Radio environment, the retransmission at the air interface will also add the time to the call setup time
6). No SDCCH and TCH congestion/block etc. in the network, if there are these facors, you can't compare it easily

You can see that it is a very difficult and complicated comparison from the above in the live network.

The comparison can be done in a lab environment which is controllable. If you have see a huge different, I'd suggest that you open a trouble ticket with vendor's support organization to see whether it is a real product issue.

[wolverine]

I would also suggest you take some traces (using TEMS, Nemo or similar) and see at which stage in the call setup the delay is introduced by looking at the delta between messages (see call flow below). This will help you eliminate a number of areas.

If you also take a trace from your competitor(s) you can then benchmark the deltas from your network to theirs.

[RF engineer]

thanks guys,
this problem appear to the whole network,our vendor-********

dear through drive test ligfile you can export layer 3 and see which part take long time on the basis of parts you can decide what to do .
Check attachment.

[taomomteling]

Hello experts,
can someone assist on this?

Hello,

The delay can be from BSS or from NSS,

Check if the queening is activated if yes check the timer T11?
High SDCCH/TCH Congestion will cause long call setup time,
Check if the Directed Retry is activated,

from NSS, also check the delay caused by the time between the first request and paging command!

Anyway, You can find in the attached file, a trial to improve the Call Setup Time,

It's for ALU but it can be useful :-)

Cheers,

[leelio]

Thanks for this great support guys, i will try to work on it...and later-on to provide f/b to you if things go well /not..

[wirelessgsmguy]

Hi,
I dont have sufficient credits to download the useful enclosure. Can you please send it to my mail id- wirelessgsmguy@yahoo.in

regards,
wireless

[titoe80]

To reduce call setup time,

Could experts suggess any remove proceudures such as: ciphering, authenticaion, and any paramters?

My network also faced the same issue and call setup time takes longer than competitor's netowrks.

[justdream]

Hello,

The delay can be from BSS or from NSS,

Check if the queening is activated if yes check the timer T11?
High SDCCH/TCH Congestion will cause long call setup time,
Check if the Directed Retry is activated,

from NSS, also check the delay caused by the time between the first request and paging command!

Anyway, You can find in the attached file, a trial to improve the Call Setup Time,

It's for ALU but it can be useful :-)

Cheers,

Thanks a lot Dear for sharing this your smart trial
Please share more 2G trials for any main KPIs improvement if you have..

[peanut]

Gents,

There is a feature in ******** called Fast Call Setup (that allow immediate assignment on TCH)

This will improve significantly the Call Setup Time

regards,

[peanut]

More details on the feature: Fast Call Setup

1 Feature Description
2 Configuration
3 New or Modified Elements
4 Using the Feature with Datagen
5 NPI LAB SPECIFIC INFORMATION
6 FIELD DEPLOYMENT SPECIFIC INFORMATION
7 Feature implementation plans
8 Troubleshooting Information

BR,

[peanut]

Report results after enabling the feature:

1 Executive Summary
2 Feature Implementation Plan Summary
. Signalling On The Air-Interface
. Call Setup Time Comparison
3 Measurement Criteria
4 Results
. Signalling On The Air-Interface
. Call Setup Time Comparison.
. PM Gui Screen Shots
. Graphs To Display The Statistics
5 Issues Found And Outstanding Actions

BR,