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Member
Reputation: 144
UE behavior in Idle mode related to S_intrasearch, S_intersearch...
Hello experts,
In my 3G NSN system, I set "Qqualmin = -18 dB,
Sintrasearch = 10dB,
Sintersearch = 8dB,
Ssearch_RAT = 4dB"
Take Sx = Q_qualmeas - Qqualmin, and in theory, we have :
•Intra-Frequency measurement thresholdSintrasearch
•If this parameter is not sent in the serving cell, the UE must always perform intra-frequency measurements. If it is transmitted and Sx > Sintrasearch, the UE does not perform intra-frequency measurements. If Sx <= Sintrasearch, it performs intra-frequency measurements.
•Inter-Frequency measurement thresholdSintersearch
•If this parameter is not sent in the serving cell, the UE must always perform inter-frequency measurements. If it is transmitted and Sx <= Sintersearch, it must perform inter-frequency measurements, but if Sx > Sintersearch, there is no need to perform this type of measurement.
•Inter-RAT measurement thresholdSsearchRAT m
•If this parameter is not sent in the serving cell, the UE must always perform inter-system measurements. If it is transmitted and Sx > SsearchRAT m, it won‘t conduct measurements on cells of radio access technology “m”. But if Sx <= SsearchRAT m, it has to do these measurements.
In driving test, I found that S_intrasearch, S_intersearch and S_searchRAT are signaled by UTRAN. (In signaling window of TEMS Investigations by E*******, I found these parameters) and Q_qualmeas = -5dB, so Sx = -5 - (-18) = 13 dB > S_intrasearch. So, in theory, MS does not measure all neighboring cells. However, I find that MS keeps measuring intra-frequency neighbor cells. It makes me confused
.
I raised this issue to an expert, he said that it is a feature of RAN NSN. I tried to dig this feature but no light until now.
Any one in this 4rum could tell me why or any docs relating to this feature ? Apprecite ![:hug:](http://www.finetopix.net/vbb/images/smilies/hug.gif)
Thank you so much for your consideration. Hope get feedback, bros.
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2010-07-08 03:47 PM
# ADS
Circuit advertisement
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Member
Reputation: 119
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
your theoretical analyze part is correct.
I need the log file for further investigation with Actix.
Regards
eritelecom
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Member
Reputation: 53
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
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Member
Reputation: 119
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
![Quote](images/misc/quote_icon.png)
Originally Posted by
johnsonsem
Qqualmin should be 18
min Ec/No 18 db ???????????
this will prevent cell selection for Ec/No less than 18 db
since sx = Qmeas - Qqualmin > 0 to select the cell
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Member
Reputation: 34
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
Some interesting stuff, I am anxious to see what will come out of it
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Member
Reputation: 143
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
![Quote](images/misc/quote_icon.png)
Originally Posted by
leteo
Hello experts,
In my 3G NSN system, I set "Qqualmin = -18 dB,
Sintrasearch = 10dB,
Sintersearch = 8dB,
Ssearch_RAT = 4dB"
Take Sx = Q_qualmeas - Qqualmin, and in theory, we have :
•Intra-Frequency measurement thresholdSintrasearch
•If this parameter is not sent in the serving cell, the UE must always perform intra-frequency measurements. If it is transmitted and Sx > Sintrasearch, the UE does not perform intra-frequency measurements. If Sx <= Sintrasearch, it performs intra-frequency measurements.
•Inter-Frequency measurement thresholdSintersearch
•If this parameter is not sent in the serving cell, the UE must always perform inter-frequency measurements. If it is transmitted and Sx <= Sintersearch, it must perform inter-frequency measurements, but if Sx > Sintersearch, there is no need to perform this type of measurement.
•Inter-RAT measurement thresholdSsearchRAT m
•If this parameter is not sent in the serving cell, the UE must always perform inter-system measurements. If it is transmitted and Sx > SsearchRAT m, it won‘t conduct measurements on cells of radio access technology “m”. But if Sx <= SsearchRAT m, it has to do these measurements.
In driving test, I found that S_intrasearch, S_intersearch and S_searchRAT are signaled by UTRAN. (In signaling window of TEMS Investigations by E*******, I found these parameters) and Q_qualmeas = -5dB, so Sx = -5 - (-18) = 13 dB > S_intrasearch. So, in theory, MS does not measure all neighboring cells. However, I find that MS keeps measuring intra-frequency neighbor cells. It makes me confused
.
I raised this issue to an expert, he said that it is a feature of RAN NSN. I tried to dig this feature but no light until now.
Any one in this 4rum could tell me why or any docs relating to this feature ? Apprecite ![:hug:](http://www.finetopix.net/vbb/images/smilies/hug.gif)
Thank you so much for your consideration. Hope get feedback, bros.
Hi leteo,
Just one question, how would know if the UE is performing intra-freq measurements?
The SIB messages are continually sent from BCCH, these are not all read by the UE depending on the RRC sub-states.
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Member
Reputation: 144
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
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Member
Reputation: 33
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
![Quote](images/misc/quote_icon.png)
Originally Posted by
leteo
Some pictures are for your info.
Logfile is too large, I can not post on 4rum
![:(](http://www.finetopix.net/images/smilies/sad.gif)
Hi,
I think its better for you to upload the log file in rapid share or any free downloading site.Its better to see the log file to assess properly. ![:)](http://www.finetopix.net/images/smilies/smile.png)
The thing is intrafrequency measurements will only be triggered when the reselection parameters were attained so its very interesting to see your experience.
Br,
Sen
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Member
Reputation: 53
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
![Quote](images/misc/quote_icon.png)
Originally Posted by
banisha
Some interesting stuff, I am anxious to see what will come out of it
![:)](http://www.finetopix.net/images/smilies/smile.png)
it's true... let's waiting to see
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VIP Member
Reputation: 1593
Re: UE behavior in Idle mode related to S_intrasearch, S_intersearch...
![Quote](images/misc/quote_icon.png)
Originally Posted by
leteo
Some pictures are for your info.
Logfile is too large, I can not post on 4rum
![:(](http://www.finetopix.net/images/smilies/sad.gif)
Dear leteo!
Can you upload to another link such as ifile, rapidshare, mediafire...
I think that it is better than the description through pictures.
Waiting for the uploaded logfiles for this issue.
ptt3i.
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