Koninklijke Kpn N.v.

Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Maurice Hiep

Annemieke Kips

Elena Mancevska

The invention relates to a method and telecommunications node for controlling an attach state of a user equipment in an attach control node of a telecommunications system further comprising a subscriber database containing subscription data of the user equipment. The method comprises receiving authentication data in the attach control node if an authentication step is required. Following the authentication step, if any, receiving in a first transfer stage a first set of subscription data from the subscriber database and storing the first set of subscription data in the attach control node, wherein the first set of subscription data is insufficient for enabling establishing a communication session between the user equipment and the telecommunications system. If establishing a communication session is required between the user equipment and the telecommunications network, receiving in a second transfer stage following the first transfer stage a second set of subscription data from the subscriber database in the attach control node, and storing the second set of subscription data in the attach control node, wherein the combination of the first set of subscription data and the second set of subscription data is sufficient for enabling establishing a communication session between the user equipment and the telecommunications network.

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Wassenaar, Netherlands

Maurice Hiep