| 摘要 |
A method and apparatus for use in a communication network. A node receives voice data relating to a voice sample of a subject and an identity of the subject. The voice data is associated with the identity of the subject and stored. A speech sample is subsequently received from a traffic node, the speech sample having been obtained from a telecommunications session. A comparison is made between the stored voice data and the speech sample, and a determination is made to check whether the speech sample is likely to belong to the subject. If so, then a message identifying the subject is sent towards an LEMF node. The LEMF node can then initiate lawful interception of the telecommunications session. The node allows a target subject to be identified by a voice sample, which makes it much more difficult for a target subject to avoid lawful interception by, for example, using a different device to make a call.
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