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