Telefonaktiebolaget Lm Ericsson (publ)

Gerasimos Dimitriadis

Volker Kleinfeld

Kurt Essigmann

Sven Steinacker

Kostas Vlachopoulos

A technique for hiding topological information in a message that leaves a trusted network-domain is presented. The message pertains to a subscriber session and comprises a Fully Qualified Domain Name (FQDN) of a message originator. The originator is located in a first network domain, and the message is directed towards a destination in a second network domain. A method aspect comprises the steps of receiving the message, determining the FQDN comprised in the message and determining an identifier associated with the message. The identifier comprises at least one of a subscriber identifier, a session identifier and a destination identifier. Further, the method comprises applying a cryptographic operation on the FQDN and the identifier, or on information derived therefrom, to generate a cryptographic value. The message is then processed by substituting at least a portion of the FQDN with the cryptographic value prior to forwarding the message towards the second network domain.

Message processing for subscriber sessions which stretch over different network domains

The invention relates to a method, by a diameter routing unit (), to route diameter commands of a data packet session using a diameter protocol in a mobile communications network, the diameter routing unit comprising a storage unit () storing information which policy and charging control unit is handling which data packet session and storing information about a presence of at least one additional diameter routing unit () which routes diameter commands of the diameter protocol to the same pool of policy and charging control units () as the diameter routing unit. The method comprises the steps of receiving a diameter command for a data packet session; checking whether information is present in the storage unit () which policy and charging control unit is handling the session to which the received diameter command belongs, wherein, if information is present in the storage unit (), the received diameter command is forwarded to one of the policy and charging control units () in accordance with the stored information, wherein, if no information can be found in the storage unit () for the received diameter command, the diameter command is forwarded to the at least one additional diameter routing unit.

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Salonika, Greece

Gerasimos Dimitriadis