Umts900?

huwdw · 24-07-2008, 00:41

Does anyone know when UMTS900 will be used in this country? It seems that it has been approved for use and rollout has begun in some other EU states.

Thanks

agent_c · 24-07-2008, 00:47

That band is still being used for GSM. So I doubt it will be for some time.

huwdw · 24-07-2008, 01:32

Quote:

Originally Posted by agent_c

That band is still being used for GSM. So I doubt it will be for some time.

I know it is, in other countries some of it has been allocated off for umts, I think the eu passed some bill or somthing saying that it didn't have to be exclsivly used for gsm anymore?

agent_c · 24-07-2008, 12:50

The EU did pass such a law, but its all moot if those frequencies are being used. The GSM networks running on the 900Mhz band would either have to shut down, broadcast only in the 1800Mhz band, or work out a way of sharing those channels so they dont clash... That kinda stuff takes time. Cant have two different transmissions on the same frequency because they'll interfere with each other.

Wikipedia recons here that most EU deployments wont be for 1-3 years

http://en.wikipedia.org/wiki/Univers...cations_System

huwdw · 24-07-2008, 12:54

Hi
Thanks for the link. I looked everywhere except there!

Yeah most of the documents seem to suggest that umts would be sandwitched in the middle of the 900mhz band, im not sure how this would avoid interferance between the outer rage of umts and gsm.

If 900mhz were to be deployed would a 900mhz umts cell has similar coverage to a 900mhz gsm cell? I seem to recall that certain limitations of umts like cell breathing meants it would be smaller?

thanks!

agent_c · 24-07-2008, 13:00

Quote:

Originally Posted by huwdw

Hi
Thanks for the link. I looked everywhere except there!

Yeah most of the documents seem to suggest that umts would be sandwitched in the middle of the 900mhz band, im not sure how this would avoid interferance between the outer rage of umts and gsm.

If 900mhz were to be deployed would a 900mhz umts cell has similar coverage to a 900mhz gsm cell? I seem to recall that certain limitations of umts like cell breathing meants it would be smaller?

thanks!

UMTS IIRC has higher power output requirements (hence why 3g drains the battery more). During my time looking at network maps in T-Mobile, The transmission range of a UMTS 2100 cell was nowhere near a GSM 1800 Cell.

Cell Breathing will also mean when that cell site is busy, range may be reduced... Thats just the way UMTS is designed to work to save power.

However, the 900Mhz band is better at penetrating buildings, so there will be some reception improvements.

24-07-2008, 00:41	#1
huwdw Forum Member Join Date: Mar 2000 Location: St Albans Posts: 638	Umts900? Does anyone know when UMTS900 will be used in this country? It seems that it has been approved for use and rollout has begun in some other EU states. Thanks

24-07-2008, 00:47	#2
agent_c Forum Member Join Date: Feb 2008 Location: This side of the screen. Posts: 910	That band is still being used for GSM. So I doubt it will be for some time.

24-07-2008, 01:32	#3
huwdw Forum Member Join Date: Mar 2000 Location: St Albans Posts: 638	Quote: Originally Posted by agent_c That band is still being used for GSM. So I doubt it will be for some time. I know it is, in other countries some of it has been allocated off for umts, I think the eu passed some bill or somthing saying that it didn't have to be exclsivly used for gsm anymore?

24-07-2008, 12:50	#4
agent_c Forum Member Join Date: Feb 2008 Location: This side of the screen. Posts: 910	The EU did pass such a law, but its all moot if those frequencies are being used. The GSM networks running on the 900Mhz band would either have to shut down, broadcast only in the 1800Mhz band, or work out a way of sharing those channels so they dont clash... That kinda stuff takes time. Cant have two different transmissions on the same frequency because they'll interfere with each other. Wikipedia recons here that most EU deployments wont be for 1-3 years http://en.wikipedia.org/wiki/Univers...cations_System

24-07-2008, 12:54	#5
huwdw Forum Member Join Date: Mar 2000 Location: St Albans Posts: 638	Hi Thanks for the link. I looked everywhere except there! Yeah most of the documents seem to suggest that umts would be sandwitched in the middle of the 900mhz band, im not sure how this would avoid interferance between the outer rage of umts and gsm. If 900mhz were to be deployed would a 900mhz umts cell has similar coverage to a 900mhz gsm cell? I seem to recall that certain limitations of umts like cell breathing meants it would be smaller? thanks!

24-07-2008, 13:00	#6
agent_c Forum Member Join Date: Feb 2008 Location: This side of the screen. Posts: 910	Quote: Originally Posted by huwdw Hi Thanks for the link. I looked everywhere except there! Yeah most of the documents seem to suggest that umts would be sandwitched in the middle of the 900mhz band, im not sure how this would avoid interferance between the outer rage of umts and gsm. If 900mhz were to be deployed would a 900mhz umts cell has similar coverage to a 900mhz gsm cell? I seem to recall that certain limitations of umts like cell breathing meants it would be smaller? thanks! UMTS IIRC has higher power output requirements (hence why 3g drains the battery more). During my time looking at network maps in T-Mobile, The transmission range of a UMTS 2100 cell was nowhere near a GSM 1800 Cell. Cell Breathing will also mean when that cell site is busy, range may be reduced... Thats just the way UMTS is designed to work to save power. However, the 900Mhz band is better at penetrating buildings, so there will be some reception improvements.

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Umts900?