Techniques for routing a communication in a
roaming scenario in a communication
system to the responsible core for which the communication is subscribed, wherein the communication
system comprises a first core of a home network, a second core of the home network and a third core of a visited network, wherein the subscription was issued by an operator of the first core, but the subscription is assigned to the second core, the method comprising the following steps: • Sending a message within the visited network, wherein the message is assigned to a service of the second core, wherein the message has a first destination information pointing to the second core of the home network, wherein the first destination information comprises an identifier of the subscription, in particular a SUPI, and / or a
routing indicator RI; • Receiving the message by a vSEPP of the visited network, whereby routing information for the first target information is stored in the vSEPP, in particular in the form of a table, whereby the vSEPP routes the message to a mSEPP of the second core based on the identifier of the subscription and / or the
routing indicator RI.