Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 4: Additional Network Feature Short Data Service (ANF-ISISDS) (V1.3.1)
The present document defines the Terrestrial Trunked Radio system (TETRA) supporting Voice plus Data (V+D). It specifies: - general design aspects (e.g. reference points@ numbering and addressing@ or protocol architecture); - the system bearer and mobility management services@ and the corresponding air interface protocols; - the interworking between TETRA networks; - the interworking of TETRA networks with other networks@ via gateways; - the peripheral equipment interface on the mobile station; - the security protocols and mechanisms applicable to TETRA networks and to TETRA terminal equipment; - the supplementary services applicable to the basic TETRA tele- or bearer services. The TETRA V+D interworking - basic operation part defines the interworking between TETRA networks over the corresponding interface: the Inter-System Interface (ISI). It comprises the following subparts: - ISI general design; - Additional Network Feature - ISI Individual Call (ANF-ISIIC); - Additional Network Feature - ISI Group Call (ANF-ISIGC); - Additional Network Feature - ISI Short Data service (ANF-ISISDS); - Additional Network Feature - ISI Mobility Management (ANF-ISIMM); - 8 kbit/s encoding of user information at the ISI. The present document specifies the Additional Network Function (ANF) - Inter-System Interface (ISI) Short Data service (ANF-ISISDS) which is part of the Interworking Basic Operation of the Terrestrial Trunked Radio system (TETRA) supporting Voice and Data (V+D). Specifically the present document details the stage 1@ 2 and 3 aspects of the ANF-ISISDS as seen from the TETRA Switching and Maintenance Infrastructure (SwMI) point of view at the Inter System Interface (ISI). This service comprises of: - TETRA user defined short message transmission over the ISI to individual and group addresses; - TETRA pre-defined short message transmission over the ISI to individual and group addresses. ANF-ISISDS enables short data and status messages to be set-up and 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 ITU-T Recommendation I.130 [4]. The present document contains the stage 1 and 2 descriptions of ANF-ISIIC@ and its partial stage 3 description. The stage 1 description specifies the ANF as seen by its users@ which are essentially the individual call control entities in both TETRA networks. The stage 2 description identifies the functional entities involved in the ANF and the information flows between them. The partial stage 3 description of ANF-ISISDS specifies its protocol.