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3G optimization.

Viewing 15 posts - 1 through 15 (of 21 total)
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  • 14th January 2006 at 15:19 #43840
    bob
    Guest

    Hi,
    i am a 2G optimizer. And i am assigned the job of 3G optimization. Can all suggest how to go about. We have installed many 3G sites motorola & other. and vendors did drive tests. Now we the in house team have to do the optimization , drive test. Can i use the same TEMS for 3g.

    Discussions, suggestions & questions needed

    Regards,

    Bob,
    t mob

    17th January 2006 at 06:59 #43841
    jood
    Guest

    yes TEMS can investigate the 3G. & the main basic radio is the same excluding that the coverage & capacity in 3G is linked to each other (capacity increase=> coverage decrease & vise versa).
    3G planning is tooooo easy comapred with GSM, but the fine tuning & optimization issue is more complex).
    this is general but im ready to replay if any specific query.

    17th January 2006 at 11:00 #43842
    Nitin Kh,
    Guest

    Hi Jood & Bob,

    Operators are yet to launch 3G here in India..So I wud like to built up some prior knowledge about Optimizing & planning 3G networks. Plss mail me the documents if u have any at my id catchnitinkhurana@yahoo.com

    Regards
    Nitin

    17th January 2006 at 15:21 #43843
    Boko
    Guest

    Hi Jood,

    Do you know if Ericsson 3G have “Rescue” handover from 3G to 2G predefined cell for voice?

    regards,
    Boko

    18th January 2006 at 06:37 #43844
    jood
    Guest

    Hi boko
    there is allways availability to make inter system HO in 3G standard system.
    Ericsson have hard HO to GSM for CS (speech)& GPRS, some vendors call it blind HO Cuz RNC dont control it (just measurement indication & release aknowledgement).

    18th January 2006 at 11:23 #43845
    Boko
    Guest

    Hi Jood,

    As far as I know under certain Ec/No the connection goes into compress mode in order to optain measurements from different frequencies for inter-frequency or inter-RAT handover. And after the decision process in RNC it is decided to perform the measurements.
    By blind/rescue etc. I meen that you can perform a handover without entering compressed mode thus without measurement reports from the GSM network. Which is very usefull if you have colocated GSM/DCS sites with UMTS sites. Do you mean that this one is possible in Ericsson let’s say in P4?

    Regards,
    Boicho

    18th January 2006 at 13:58 #43846
    jood
    Guest

    Boko You generally right:
    The HO you said (compression mode) controlled by RNC is (inter frequ-intra system HO) depending on CPICH RSCP, Ec/Io is 1st type hardHO (within UMTS) FDD>TDD or FDD>diff Carrier FDD.
    For 2nd type hardHO (Inter system) to GSM, there is no compressed mode measurement, the measurement I said is based on CPICH power & outage threshold to send release indication toward RNC, & according to GSM neighbors list Planned on inter system HO window the UE measure & handoff to defined GSM cell.

    18th January 2006 at 15:25 #43847
    Boko
    Guest

    Hi Jood,
    I didn’t understand that very well. Can you be more clear about 3G to 2G hard handover. Is there a compressed mode for measuring 2G cells or not? In my doc’s it’s not very clear as both hard HO are in the same place.

    Tnx
    boko

    19th January 2006 at 07:08 #43848
    jood
    Guest

    OK boko:
    Firstly its high sophisticated algorithm & yet under evolution progress world widely, for that they call it (blind) Cuz lack of control due to probable conflicting decision between source/target RRM entities(potential ping/pong).
    2ndly the UE use the compressed mode just for same RAT, & so Inter Rat HO need multi-mode-device UE,
    #Basically to perform such HO the UE need to switch to target technology (RX different tuning), & this make interruption time to measure the diff (radio, access tech, diff controller).
    #the RAT/source decide the HO to UE & after that UE make the measurement on target RAT ?????,but UE make the interruption time used to (switch on & measure)on target RAT, by individually compression on source (UMTS band) to obtain such interruption space for target technology. So it’s not the compression mode under discussion.
    But may there UE with separated RX processor & control the diff path simultaneously(I read about it but not much).

    22nd January 2006 at 06:32 #43849
    corfou
    Guest

    what is the pilot ch 3G.

    23rd January 2006 at 12:13 #43850
    Boko
    Guest

    Primary Common Pilot Channel – physical channel with null data which actually sends the scrambling code of the cell. It is used for cell celection/reselection and HO.

    26th January 2006 at 18:06 #43851
    Bob
    Guest

    Thank you all for your input. We have now 300 sites(more to be added) in our n/w of 3g , soon to be released for customers. It’s good learning experience.

    27th January 2006 at 14:28 #43852
    Boko
    Guest

    Hi Bob,

    I think soon you will give the input

    Good luck

    31st January 2006 at 08:07 #43853
    Vijay
    Guest

    Hi Boko,

    Can u plz focus on differant between WCDMA & 3G network?

    Waiting 4 yr reply plz???????????/

    and also how many hw change if we change 2G sites to 3G and which one?

    31st January 2006 at 08:21 #43854
    Vijay
    Guest

    Hi BOKO,JOOD

    I want yr yahoo id plz \……..

    so i can talk with u when u r free??

    plz

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