- This topic has 28 replies, 1 voice, and was last updated 11 years, 5 months ago by jose Lukanda kasongo.
21st July 2009 at 13:08 #58024ashrafGuest
Pls, explain onee thing. as i know paging retransmitts for all cells in bsc. How could it be that number paging commands for bsc/per hour is different from number of paging comands for one cel/per hour in this bsc?
Thank in advance21st July 2009 at 15:20 #58025PixGuest
Are you both looking at hourly values ?? I’m amazed by this number of 3 millions !!
I’m checking it out right now.
One thing : the numbers I have given you are MAXIMUM capacity, not 60%. Sorry for my mistake.21st July 2009 at 15:34 #58026PixGuest
If MC8A is different between cells within same LAC, 3 possibilities:
1/ MC8a have some problems
2/ corrupted BSC database: try changing your LAC ID to another number then back to the initial value (for all cells in the LAC)
3/ wrong CELL / BSC / LAC mapping in the MSC
4/ MSC paging method is done based on CELL LIST IDENTIFIER containing certain cells only, and not the whole LAC.
I can’t really help you more than that, you should ask help from your local ALU support.
Pix2nd August 2009 at 18:39 #58027AbdelGuest
how can i calculate the load of my paging using the below indices.
paging messages=80,000 per hour
Number of AGCH blocks=2
I got this formula from a book
CAPACITY of PAGING CHANNEL
Combined BCCH: YES
Blocks for Access Grant:1
Number of Pages/Block:3
Max. Capacity: 25 pages / sec
91915 Pages per Hour
=============================3rd August 2009 at 09:13 #58028AbdelGuest
I get some info,plz confirm
1. combined bcch has 3 CCCH blocks
2. noncombined bcch has 9 blocks.
3. In our network i have 2 agch blocks and 5 for pch a total of 7 blocks,therefore can increase the PCH from 5 to 7 cuz i have still 2 CCH blocks left for me?
4.This is how i did to calculate the PCH load, (in the cell parameter the load threshold for pch is 60)
paging times per hour=80,000
length of a single frame=235ms
TMSI or IMSI paging: TMSI paging
5 pch blocks X 3 paging messages per block=15 paging messages/235 ms
64 paging messages/second
230,400 messages per hour
60% load X 230,400=138,240 per hour.
I think I still get some paging space for this lac?3rd August 2009 at 12:59 #58029AbdelGuest
In the Paging request message i got both the IMSI and TMSI and in the paging response i got only TMSI, I thought that if TMSI paging is activated at MSC side then in the paging request only the TMSI must include, why there is an IMSI too???!4th August 2009 at 08:21 #58030PanGuest
Paging request may identify several MS. Perphaps these Ids belong to different MS?4th August 2009 at 12:29 #58031AbdelGuest
No i have only two IDs, by the way i thought when TMSI is activated then IMSI can not be traced from A interface is this right. What i have seen it is that i put trace on my imsi and i see a pag_req with both the imsi i am tracing and a a TMSI.5th August 2009 at 05:55 #58032PanGuest
Abdel, sorry – you are saying about A-interface but I am – about radiointrfc. Paging message on A-interface is related only to one MS. This message contains IMSI as mandatory parameter and TMSI if MSC wishes to page on IMSI. IMSI is used by BSS for e.g. paging group calculation in DRX-mode. See Paging message format in 08.08.5th August 2009 at 12:25 #58033PanGuest
mistake:’wishes to page on IMSI’ = ‘wishes to page on TMSI’5th August 2009 at 17:38 #58034AbdelGuest
thanks pan, i traced the radio interface and i got the tmsi paging there is no imsi available.7th August 2009 at 05:48 #58035AskariGuest
For your question of different cells having different Pagings.
Two more possibilities could be (provided you have GPRS enabled).
1. Cells in same LAC are in different RAC as the MS are paged per RAC + LAC basis. or
2. Packet paging is disabled on some cells / BSCs.7th August 2009 at 07:26 #58036AnkitGuest
I want to know that in bts where we use the TSDA.
What is the main difference between TSDA & TSDB.
Please clear my confusion.
Ankit7th August 2009 at 14:10 #58037jose Lukanda kasongoGuest
i have 14 frenquency in my Frequency hopping set.
I want to implement hopping synthsis 1/1
somme one can help me to do the MAIO planning?