Radio link time out

[plannerguy]

Hi

Enginners/experts


I would like to change the Radio link time out of Both MS and BTS end,Is there any standard value to be kept ?
Also while changing this is there any other parameter to be changed?


for kind infmtn -i am working with seimens network.


Regards
Plannerguy

[RF engineer]

inside city put low radio link timeout let say 15 sec and outside put 25 and also there is T3109 for inide put 18 and outside 26.
BR
RF

[plannerguy]

thanks for reply , i have small doubt

I s there any seperate parameters for AMR ?


Regards
Plannerguy

[electron]

inside city put low radio link timeout let say 15 sec and outside put 25 and also there is T3109 for inide put 18 and outside 26.
BR
RF

Dear,

It's depend to your LAPDm delay in layer 2 and core transmission but please pay attention if you configure it to less value you will earn more call drop rate in your network in my point of my idea for a network that is using all transmission interfaces(Radio,PCM,Optical fiber,...) it's much better assign 32.

BR
Reza

[atese]

thanks for reply , i have small doubt

I s there any seperate parameters for AMR ?


Regards
Plannerguy

Hi plannerguy.

if your net is NSN you also have radio link time out for AMR, it´s calles AMR-RLT you can find it in the NED.

I´m sure the most of the vendors have this parameters also

Regards

[plannerguy]

hi atese


My network is siemens and i cant see any parameter as mentioned above.

I checked EDOC which is similar to that of NED in NOKIA .

Current setting in network is RLT MS -24 and RLT BS-28.

Reagrds
Plannerguy

[RF engineer]

thanks for reply , i have small doubt

I s there any seperate parameters for AMR ?


Regards
Plannerguy

Yes there is different if you use AMR it will be longer than non AMR
For FR AMR inside city mostly 25 and AMR HR will be 18.
BR
RF

[justdream]

can you guys kindly give us short description about the benefits of changing Radio link time out

and what's the meaning of these vlaues 'inside city put low radio link timeout let say 15 sec and outside put 25 '?

[RF engineer]

can you guys kindly give us short description about the benefits of changing Radio link time out

and what's the meaning of these vlaues 'inside city put low radio link timeout let say 15 sec and outside put 25 '?

Radio link timeout is the parameter which supervise the radio link condition on the basis of SACCH frame which this logical channel send to system and include ( RX level,Rx quality,TA ,,,,,,,) so when there are problem in the cell then the system can not read the MR so this indicate the connection is not good so in order not to directly after bad condition system release my channel it will try to keep monitoring until the connection come to be dropped there fore there will be no more any physical connection. and the seeting for this parameter is different for inside city and outside city because of the site density .
and for more check the link
http://www.finetopix.com/showthread....ght=radio+link

[ghostmixmax]

default value is 25