Apparatus and method for communication monitoring in a mobile radio network

摘要

The present invention relates to an apparatus for communication monitoring in a mobile radio network, in which the data is transferred in the form of data packets, with each mobile radio subscriber being allocated to a radio access entity (20) which can exchange data with said subscriber via radio, which allocation may change with the movement of said subscriber, each said radio access entity (20) being connected to a serving switching entity (12) via a first link (26), each said serving switching entity (12) exchanging data between plural radio access entities allocated to it or with a higher instance to which plural serving switching entities are allocated, each said serving switching entity (12) being connected to a subscriber database entity (14) via a second link (28), said subscriber database entity (14) containing subscriber-oriented data of the mobile radio subscribers allocated to it, said data exchanged between a radio access entity (20) and its allocated serving switching entity (12) being ciphered data, whereby at least first and second ciphering parameters are used for ciphering a first link (26), which first ciphering parameter is provided by said subscriber database entity (14) and which second ciphering parameter is obtained, especially dynamically recovered, from the data exchange between said radio access entity (20) and its allocated serving switching entity (12), comprising least one processing device (32) which may be connected to plural first and/or second links (26; 28), each said processing device (32) being designed to determine, from the data transferred via the respectively connected first and second links (26; 28), the current at least first and second ciphering parameters, and to decipher the data on the first links (26) using the respective at least first and second deciphering parameters; at least one deciphering parameter providing device (34) in which the current at least first and second ciphering parameters can be filed by the at least one allocated processing device (32) and may be made available to it upon request by a processing device (32), in particular a processing device (32) other than the one which filed said at least first and second ciphering parameters in said deciphering parameter providing device (34) and at least one deciphered data providing device (36) for providing at least a partial amount of said deciphered data, wherein said at least one processing device (32), said at least one deciphering parameter providing device (34) as well as said at least one deciphered data providing device (36) can be located independently of each other. The invention moreover relates to a corresponding method.