- This topic has 10 replies, 1 voice, and was last updated 9 years, 3 months ago by Mike.
2nd January 2009 at 10:45 #55257DesertStormGuest
I wanted to ask: In non combined mode, there are 9 paging blocks in the control multiframe. In our network, one of these blocks is reserved for Access Grant Channel.
there are 51 timeslots in a control multiframe
1 paging block (4 timeslots) is reserved for Access Grant Channel in one multiframe
So How many users can this Access grant Channel support at a time(in 1 paging block)?2nd January 2009 at 17:18 #55258pixGuest
i forgot the number… so i will not answer your question. I will just ask you another question :
your current configuration is 1 AGCH + 8 PCH ( = 9 CCCH), which doesn’t look very good. I suspect your cell is actually configured as dynamic AGCH. The number of AGCH can increase, depending on the demand.14th January 2009 at 13:13 #55259muathGuest
I want to know how to calculate maximum paging commands on Air interface19th January 2009 at 05:49 #55260vivekGuest
it will be like this:
But i am not sure.
total ccch channel=8
in 1000ms it will be (1880/235)*1000
=>8000 per second from one cell…
Am i right..??19th January 2009 at 08:12 #55261MicheleGuest
Hi Vivek,, you are wrong:
into 235 ms there are 9 ccch blocks in case of not combined CCCH or 3 ccch blocks in case of combined CCCH. So, depending on the channel combination we can transmit on air 9/3 Immediate Assignment or Paging Command every 235ms.19th January 2009 at 09:47 #55262vivekGuest
Desert storm has mentioned that he has 1 AGCH reserved so v r left out with only 8 ccch for paging.
I was nt talking of combined or ncomb mode.
& moreover the whole 51 tdms frame will be transmitted as a whole i.e for a time span of 235 ms.19th January 2009 at 18:08 #55263PixGuest
I think Michele missed the 1 AGCH, but otherwise I agree with both of you. Except that… there is more than one paging command in one PCH block, isn’t it?
I think a typical assumption is 3 commands / block (due to a mix of IMSI or TMSI paging method). It has been a long time i didn’t do this kind of stuff, so if you can confirm what I’m saying, that’ll make me feeling less forgetful :))19th January 2009 at 18:13 #55264PixGuest
sorry, i didn’t finish… second part of the post:
vivek, there are 8 PCH blocks per TDMA frame, so that’s 24 paging commands / 235 ms.
That’s 102 paging commands per second.
I don’t know why you multiply by 235. There are 8 PCH / 235ms, that’s all.
>> there is usually a load limit of 60% on the PCH, so usually the PCH limit is dimensioned at 60% x 102 paging commands / sec.19th January 2009 at 22:49 #55265pixGuest
sorry, third part: i didn’t mean “TDMA frame” in the previous post (the second post, if you still follow me…), but “51 multiframe”.19th January 2009 at 22:50 #55266pixGuest
good night!1st November 2011 at 16:24 #55267MikeGuest
How can i get AGCH load?