Lawful identification of unknown terminals

摘要

The present invention relates to methods and arrangements to establish an identity of a target T. The method comprises the following steps:—Collecting geographical location points A, B, C, D indicating presence of the target.—Interrogating at least one mobile network to fetch lists of identities of users located in defined areas C1-C3, each area covering a collected geographical location point.—Crosschecking between the fetched lists.—Identifying a single identity that is common to the fetched lists.

主权项

1. A method for establishing a subscriber identity of a target in a mobile network, comprising:
receiving by a monitoring unit comprising a microprocessor, first and second geographical location points indicating presence of the target at the first and second geographical location points at respective first and second times; identifying one or more access points in the mobile network that serve first and second defined areas encompassing the first and second geographical location points, respectively; sending from the monitoring unit to the one or more access points, a request to monitor users present in the first and second defined areas; receiving by the monitoring unit, a first list of subscriber identities for users located in the first defined area at the first time; receiving by the monitoring unit, a second list of subscriber identities for users located in the second defined area at the second time; crosschecking by the monitoring unit between the first and second lists; and identifying by the monitoring unit from the first and second lists a subscriber identity that is common to the first and second lists.