Abstract: A method for providing lawful interception, LI, in a radio communication system (500) with network slices, NSs, (520, 530, 540). The method comprises: providing a broker LI provisioning function, bLIPF (508) connected to an LI centralized function, LICF, (506), and to at least one slice LI provisioning function, sLIPF, (528, 538, 548) implemented on one of the NSs; receiving an LI target identity, if the LICF determines that a party of a network service provided using a network function, NF, (522, 524, 526, 532, 534, 536, 542, 544, 546) running on the one of the NSs has the LI target identity; and conveying the LI target identity from the bLIPF to the at least one sLIPF, wherein the at least one sLIPF activates a point of interception, POI, (522p, 524p, 526p, 532p, 534p, 536p, 542p, 544p, 546p) associated with or embedded in the NF to intercept data.

Abstract: Methods and devices provide lawful interception (LI) using slice-based mediation and delivery functions (sMDFs) and providing network slices configured for performing LI functionality as required. A network slice of a radio communication system is selected if configured to execute an sMDF. If a party to a service delivered using a network function (NF) implemented on the selected slice is indicated as being an LI target, then LI data intercepted from the NF is forwarded to the sMDF within the selected slice. The sMDF then reformats and transmits the LI data outside the network slice.

Abstract: Methods and apparatuses start lawful interception of an ongoing communication process in an after-handover network environment prior to completing an international handover of a user device. The user device is party of the ongoing communication process and an LI target. The user device being an LI target is determined based on the user device's identity, which is retrieved if the international handover is initiated.