Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 14: Transport layer independent Additional Network Feature Short Data Service (ANF-ISISDS) (V1.1.1)
The TETRA V+D interworking - at the Inter-System Interface (ISI) part defines the interworking between TETRA networks over the corresponding interface: the Inter-System Interface (ISI). It comprises the following sub-parts: Transport layer independent General design [3]; General Design@ PSS1 over E.1 [i.2]; General Design@ SIP/IP [i.3]; Transport layer independent Additional Network Feature - ISI Individual Call (ANF-ISIIC) [i.4]; Transport layer independent Additional Network Feature - ISI Group Call (ANF-ISIGC) [2]; Transport layer independent Additional Network Feature - ISI Short Data service (ANF-ISISDS) (the present document); Transport layer independent Additional Network Feature - ISI Mobility Management (ANF-ISIMM) [i.5]; Generic Speech Format Implementation [i.6]. The present document specifies the Additional Network Function (ANF) - Inter-System Interface (ISI) Short Data service (ANF-ISISDS) which is part of the Interworking at the Inter-System Interface (ISI) of the Terrestrial Trunked Radio system (TETRA) supporting Voice and Data (V+D). This service comprises of: TETRA short message transmission over the ISI to individual and group addresses; TETRA pre-defined status message transmission over the ISI to individual and group addresses. ANF-ISISDS enables short data and status messages to be transferred between a user registered in one TETRA network to another user registered in another TETRA network@ operating at the ISI of both SwMIs. Like all other Additional Network Feature (ANF) specifications@ those of ANF-ISISDS are produced in three stages@ according to the method described in Recommendation ITU-T I.130 [4]. The present document contains the stage 1 and 2 descriptions of ANF-ISIIC@ and stage 3 description. The stage 1 description specifies the ANF as seen by its users@ which are essentially the CMCE SDS entities in both TETRA networks. The stage 2 description identifies the functional entities involved in the ANF and the information flows between them. The stage 3 description of ANF-ISISDS specifies its protocol.