UMTS 900 Refarming questions

[djordjebeg]

Dear Colleagues ,
I would ask if you could share with me in case you are using UMTS900 what is spectrum allocation for GSM900 and 1800 Mhz?
I mean if you use UMTS900 do you use 4.2 or 4.4 or 4.6 Mhz transmission bandwidth of UMTS?Do you use UMTS900 in urban or rural and suburban areas? How many GSM channels remains on 900 and how many channels u are using on 1800 Mhz bad?

Kind Regads and Thanx is advance!

[Philippe]

Hi,
You can certainly already find some UMTS 900 guidelines in the forum. In particular, there was a good guidelines document from Qualcomm summarizing the main recommendations from 3GPP (minimum bandwidth for UMTS, sandwich concept, minimum separation between UMTS and GSM, isolation zone between areas with UMTS 900 and areas without UMTS 900). Here is the link as it has already been posted (see chapter 3):
http://www.finetopix.com/showthread....ent-Guidelines

You should minimize the bandwidth for UMTS -depending on the capability of your vendor NodeB equipment (check with them), do not use the 200kHz first channels around this bandwidth- and maximize your bandwidth for GSM 900 enabling a minimum TRX capacity per site (use of frequency hopping can be needed and having 1800MHz bandwidth (and so a good layer of 1800MHz) will enable you to have enough capacity if needed in the area where you are deploying 900MHz).

[djordjebeg]

Thank you very much Philippe! Nice and very useful info!

Kind Regards,