| Discussion and conclusion:
Merged with TD S2 160224, TD S2 160237 and TD S2 160186 into TD S2 160576.
TD S2 160186 23.402 CR2929 (Rel 13, 'C'): ePDG selection enhancements for the support of Lawful Interception. (Source: Alcatel-Lucent, Alcatel-Lucent Shanghai Bell).
Abstract: Summary of change: The ePDG selection procedure is enhanced as follows: - The UE considers an indication introduced in 23.401 in NAS from the VPLMN when connecting to it, as to whether an ePDG shall be selected in the visited country or not; - The selection algorithm is modified to consider both the cases in which the UE has received the indication and it has not received the indication - Addition of an optional query to a DNS server, to derive from the known MCC all the PLMNs in the local country (for the case of multiple MCCs in the country). - Enhancements to the ePDG Selection Info (based on the extension of the attributes of each PLMN in the ePDG selection info 'mandatory, preferred' with a new 'not preferred' value) to enable the UE to know all the PLMNs having roaming agreements for untrusted WLAN with the HPLMN when roaming. - The UE can then attempt to establish an IPSec tunnel to an ePDG that is operated by any PLMN listed in the enhanced ePDG Selection Info.
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