SoLSA consists of a set of service features that give the operator a basis to offer subscribers different services (e.g. tariffs or access rights) depending on the location of the subscriber (TS 42.043). The following section is only applicable to the support of SoLSA functionality in GERAN.
The standard automatic and manual network selection procedures will be used.
Manual network selection may be required when the PLMN providing the users SoLSA service is not the one on which the user is currently registered.
At manual network selection the UE shall provide the means to present the subscribers LSA(s) for each PLMN presented.
It shall be possible to allow LSA user to access PLMN only within his LSAs. A LSA user is not allowed to receive and/or originate a call outside the allowed LSA area.
When UE is out of the allowed LSA area it shall be registered in PLMN but indicate subscriber/service specific "out of LSA area" notification. It shall be a network-controlled function to prevent terminated or/and originated calls. Emergency calls are however always allowed.
Access to exclusive access cells is restricted to defined LSA subscribers.
Non-LSA subscriber shall consider exclusive access cells as not suitable, only allowing to camp for emergency calls (limited service state TS 23.122).