A method for a secure detach procedure in a radio...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/38 (2006.01)

Patent

CA 2320464

The present invention proposes a method for performing a detach of a terminal (MS) registered to a telecommunication network (NW) by associating an identification (TMSI) for said terminal (MS), deriving a signature (TMSI_SIG) for said identification (TMSI), and allocating a pair consisting of said identification (TMSI) and said signature (TMSI_SIG) to said terminal (MS), said method comprising the steps of: sending a detach request (DET_REQ) including said identification (TMSI) and said identification signature (TMSI_SIG) from said registered terminal (MS) to said network (NW); receiving said detach request (DET_REQ) at the network (NW) side; comparing said received detach request (DET_REQ) with a record of registration data of said terminal (MS) kept at the network side; and detaching said terminal (MS) from said network (NW), if said received detach request (DET_REQ) coincides with said record of registration data. Also, the present invention relates to a corresponding registration method and proposes a new format for a detach request message transmitted from a mobile station (MS) as a terminal to a network (NW) controlling device like an MSC, and also relates to correspondingly adapted devices.

La présente invention concerne un procédé permettant d'effectuer le détachement d'un terminal (MS) enregistré auprès d'un réseau de télécommunications (NW) au moyen de l'association d'une identification (TMSI) propre audit terminal (MS), de la dérivation d'une signature (TMSI_SIG) relative à ladite identification (TMSI) et de l'attribution d'une paire formée de ladite identification (TMSI) et de ladite signature (TMSI_SIG) audit terminal (MS). Le procédé comprend les étapes suivantes: l'envoi au réseau (NW) par le terminal enregistré (MS) d'une demande de détachement (DET_REQ) comprenant ladite identification (TMSI) et ladite signature d'identification (TMSI_SIG); la réception de ladite demande de détachement (DET_REQ) par le côté réseau (NW); la comparaison de ladite demande de détachement (DET_REQ) à un dossier de données d'enregistrement dudit terminal (MS) conservé côté réseau; et le détachement dudit terminal (MS) du réseau (NW), si ladite demande de détachement (DET_REQ) coïncide avec ledit dossier de données d'enregistrement. La présente invention concerne également un procédé d'enregistrement correspondant et propose un nouveau format pour le message de demande de détachement envoyé par une station mobile (MS) telle qu'un terminal à un dispositif de commande de réseau (NW) tel qu'un centre de commutation pour les services mobiles (MSC) ainsi que des dispositifs associés adaptés.

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