Basic functionality for Local IP Access (LIPA) has been specified in TS 22.220
LIPA signifies the capability of a UE to obtain access to a local residential/enterprise IP network (subsequently called a local network) that is connected to one or more H(e)NBs. LIPA allows a UE to connect to devices in the local network - e.g. printers, video cameras, or a local web-server.
If the local network offers services that enable exchange of digital content (e.g. UPnP) LIPA also allows the UE to discover supporting devices and to be discovered.
Additionally to LIPA an operator may, e.g. as a chargeable user service, also wish to provide access to the local network when a UE is under coverage of the macro network or a H(e)NB that is not connected to that local network. Access to the local network when a UE is under coverage of the macro network or a H(e)NB that is not connected to that local network has been described in TS 22.220
section 5.8 under the name of "Managed Remote Access to home based network" (MRA).
From user's perspective LIPA and MRA describe the same service, namely access to a local network. The only difference is whether the UE is under coverage of a H(e)NB in that local network or not. Therefore an ongoing data session between the UE and the local network should continue when the UE changes access :
between H(e)NB in that local network and (e)NB/H(e)NB that is not connected to that local network;
between (e)NBs and H(e)NBs that are not connected to that local network.
SA2 is currently investigating solutions for LIPA (and SIPTO) mobility which should be enabled in Rel-11.
In the context of this TR "Continuity of service" signifies continuity of UE access to the local IP network