scope:

The present document defines the mobility management of interworking at the Inter-System Interface (ISI) for Terrestrial Trunked Radio (TETRA) system supporting Voice plus Data (V+D). The TETRA V+D Inter-working - basic operation part defines the Inter-System Interface (ISI) between the SwMIs as specified in the following sub-parts: - Additional Network Feature - Inter-System Interface General Description (ANF-ISIGD). - Additional Network Feature - Inter-System Interface Individual Call (ANF-ISIIC). - Additional Network Feature - Inter-System Interface Group Call (ANF-ISIGC). - Additional Network Feature - Inter-System Interface Short Data Service (ANF-ISISD). - Additional Network Feature - Inter-System Interface Mobility Management (ANF-ISIMM). NOTE: These ENs are produced in analogy with the ITU-T Recommendation I.130 [8]. The present document contains the ANF-ISIMM part. The ANF-ISIMM part defines additional Mobility Management (MM) services to the SwMIs. If supported, the ANF-ISIMM services complement the intra-SwMI-MM, authentication and key management services. In support of these, the ANF-ISIMM enables the invocation and operation of these services between the SwMIs over the ISI. Thus, ANF-ISIMM offers the following services: - Migration and restricted migration. - Individual subscriber and group profile update. - Profile update. - De-registration. - Group attachment/detachment. - Individual subscriber and group database fault recovery. - Authentication, one-directionally or mutually between the individual subscriber and the home SwMI. - Over-The-Air-Re-keying (OTAR) for Static Cipher Key (SCK) generation and SCK delivery. For the following service only the stage 1 descriptions are included: - Linking/unlinking of groups.