scope:

There are several types of virtual private network (VPN) services such as remote access VPN (or client-to-server VPN), site-to-site VPN, community-based VPN, etc. This Recommendation focuses on the mobile VPN framework in NGN based on the host-based mobility framework in which mobile UEs are directly involved in the VPN. The mobile VPN framework is based on the mobility-related ITU-T Recommendations [ITU-T Q.1706], [ITU-T Q.1707], [ITU-T Q.1708], [ITU-T Q.1709] and [ITU-T Y.2018], as well as on the VPN requirements described in [ITU-T Y.2215]. This Recommendation covers the following:

- requirements of mobile VPN;

- mobile VPN architecture in terms of high-level functions, functional architecture and reference points;

- high-level mobile VPN procedures based on host-based mobility.