Sorry, i would ask something 1. Why repeater could not be used on CDMA? I found this statement a long ago 2. In my country some operator could do roaming in other area instantly, but some other needs registration, how does these difference? Thank You
Repeaters can be used with CDMA, there are several repeaters on the market that are large enough to cover an average sized home. Maybe the particular repeater you were looking at was not compatible with CDMA? -Jay
Hmm i see, Yes i read it on old paper, but now i see everywhere in the net selling CDMA's repeaters. With repeaters it will so much increase capacity also coverage, but is it still considering "cell breathing", if it's true, than these repeaters would not be too far from origin tower isn't it?
Actually i work on GSM Operator, but want to know either about CDMA, i had spare time to share knowledge about cellular network to other, that doesn't work at all on cellular engineering. Just want to discuss.
Hi Erwin, You can use repeaters in CDMA and WCDMA networks, but it's more complicated compared to GSM. Here are some interesting things you can read that explain it a little better: http://www.cs.tut.fi/tlt/RNG/publications/docs/topology/RepHotspot.pdf http://www.3gpp.org/ftp/Specs/2008-03/Rel-7/25_series/25956-710.zip Regarding roaming, I think it all depeneds on what kind of agreements each operator has with each other. Registration is normally not necessary, but maybe the Indonesian operators made it like this for some reason. They can be funny guys sometimes . A friend of mine was helping to drive-test a new Indonesian network, but they would only give him a pre-paid card, so he would have to stop the car every hour and change the SIM card....Then when he presented reports of the dropped calls, management asked him why there were so many, he had to explain those were from when the time on the pre-paid card expired! :lmao: Ok, time for some kopi luwak....
Thank You RadioRiders, i'll download and soon read it all to get it clearer and share others. About CDMA's registration, Yes sometimes i didn't now what's happen and why is it, there are 3 big service provider here and some newbie, two of them always do registration everytime entering new area (that's wasn't his HLR number), but rest of it, and actually it was the first provider in Indonesian CDMA business doesn't do registration. Yes i think it's just a matter of policy, and policy was far beyond there Ha..ha, they should give Your friend more reliable cards other time, or reliable networks Thanks again Greetings, if You had any time, go to Sukabumi and i serve You with warm "bubur ayam" and "Moci" cakes PS : We had "bandrek" instead of kopi luwak, it's good for Your health
He asked for a post-paid card, but they wouldn't give him one. Again, matter of policy Thank you for the invite! I almost went to Jakarta 2 years ago, but then got sent instead to Australia. If I ever come there I'll look you up. (Altho how far are you from Jakarta?) Bandrek sounds better. I don't know about that kopi luwak. I work with some Indonesians (former Excelcom guys) and they told me it's the most expensive coffee in the world. Then they told me how it's "processed" I asked them how it tastes, they said "Oh no, we never drank it, it's for tourists"....:lmao: :lmao:
Ha..ha, be patient on it By the way i had read Your reference and seems like more complicated to apply repeater on W-CDMA network, there are some additional link budget parameters. It's all right at least i know repeater were applied too on W-CDMA network, wait it's W-CDMA network, what about pure CDMA? Well from jakarta You can ride Your vehicle or many other choices bus, it;s about 150 km and 3 hours trip, it's nice to take "Puncak" route, You can see wide green tea field and mountain cold. I'll wellcome You well About kopi luwak, yeah i've heard those story too, but never try it till now, if You were seriously comes here, i'll get You one, oh one for me too
Sorry, my references wre only to WCDMA as I only work on GSM and WCDMA networks, I have no experience with CDMA :O However, I think the properties of CDMA and WCDMA are similar, especially in terms of repeaters, since they both have a 1/1 frequency re-use and rely on orthogonal codes (PN codes or SC codes) to differentiate the connections. GSM has 1/3 or 1/4 reuse as it gives users their own frequencies...ok, 8 users (ie: timeslots) get 1 frequency actually.....some Indian operators use MAIO with GSM that gives 1/1 reuse with freq hopping, but that is something really crazy! I'm not sure repeaters can be used for that or not..... But repeaters for GSM are generally easier, because if you amplify/repeat only 1 GSM frequency you can do it without disturbing the neighbors. But if you amplify a CDMA or WCDMA signal too much you will kill the neighbors since they are using the same frequency as the signal you are repeating. Everything with CDMA/WCDMA is always more complicated compared to GSM. If I ever make it down to Indonesia, we'll have that coffee and discuss it deeper
Okey never mind, Yep, except for it's working band, WCDMA should had less loss than CDMA had but least coverage too. With this application did You means neighbors BTS would had same frequency carriers? That would be awfull and risk on interference. Agree with You We'll wait for it Thanks
