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SDCCH Blocking

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  • #59532 Reply
    pridey
    Guest

    what is the syatematic way to deal with SDCCH block in a n/w of Nokia equip.
    pls give a step by step method pls/

    #59533 Reply
    krish
    Guest

    Hi,

    first check ur hardware.

    check the lac boundry

    #59534 Reply
    Bijoy
    Guest

    Pridey.
    You can go by this.
    Check if equipped SDCCH capacity is sufficient to cater the BBH SDCCH Traffic.If YES,
    A)Check for H/W issues
    B)High HR Traffic
    C)LAPD signalling
    D)No. of SDCCH configured/TRX
    E)Change the LAC boundary if SDCCH usage due to LU is very high.
    F)Go for Carrier Augmentation if Cell Utilisation is High

    If NO,
    A)Add SDCCH and check.
    B)Enable Dynamic SDCCH,if disabled.

    #59535 Reply
    pridey
    Guest

    thank u bijay . info is useful.

    #59536 Reply
    pridey
    Guest

    “High HR Traffic” how is it related to SD blk?

    #59537 Reply
    Bijoy
    Guest

    Pridey
    If HR Traffic is high,signalling load will obviously be higher.(but check first if your HR triggering is rational,you should trigger HR only when FR utilisation is >80%).So,cells where HR Traffic is higher,you need to augment the LAPD signalling from 16 KBPS to 32 KBPS.

    #59538 Reply
    guru
    Guest

    bijay can you tell me how 26&51 frame works and how it is transmitted pls

    #59539 Reply
    pawandeep singh
    Guest

    1.Add SDCCH and check.
    2.Enable Dynamic SDCCH,if disabled
    3.Check no. of SDCCH configured/TRX
    4.Change the LAC boundary if SDCCH usage due to Location update is very high.

    #59540 Reply
    Bijoy
    Guest

    Guru
    Try reading this book as this is quite complex–Mobile radio networks: networking, protocols, and traffic performance By Bernhard Walke

    Once you read,then we can discuss and clear your doubts

    #59541 Reply
    mesfer
    Guest

    How we can that book, dou have link for it!!

    Thnaks

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