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Behavior of MS when changing LAC Cell ID

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  • 18th October 2012 at 18:39 #68658
    PIS
    Guest

    Hi,
    What MS requests to BSS and MSC when changing LAC Cell ID :
    LU Request, TMSI change, etc…

    18th October 2012 at 18:47 #68659
    pix
    Guest

    hi pis,

    upon changing LAC, the MS intiates a Location Area update (CH REQ -> IMM ASSIGNMENT -> SDCCH)

    During the LAU process, the MSC may request a TMSI reallocation (optional, but often done), and will perform all the usual checks : ciphering, authentication)

    regards
    pix

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