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Dialling, Numbering & Addressing

Dialling, Numbering & Addressing. Pieter de Kruyff R&S BICK Mobilfunk GmbH. Agenda. Definition of terms Dialling & Man Machine Interface (MMI) Addresses and Identities Numbering and Addressing Call Scenarios. DIALLING - Identity exchange mechanism between User and Terminal.

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Dialling, Numbering & Addressing

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  1. Dialling, Numbering & Addressing Pieter de Kruyff R&S BICK Mobilfunk GmbH

  2. Agenda • Definition of terms • Dialling & Man Machine Interface (MMI) • Addresses and Identities • Numbering and Addressing • Call Scenarios

  3. DIALLING - Identity exchange mechanism between User and Terminal NUMBERING - decimal representation of air-interface addresses as seen by the user i.e. user visible numbering ADDRESSING - Identity exchange mechanism over air- interface, provides the routing information for the network Definition of terms(as used in this presentation)

  4. TETRA Dialling & MMI ID exchange between user and terminal TR 102 300-5: Leading Digit dialling Relative and Shortened dialling Display scrolling Soft keys Number presentation (CLI & TPI) Special numbers e.g. 999/ 112 Mode keys Full dialling Man-Machine Interface MMI - ETR 294

  5. MOBILE NETWORK ID SHORT SUBSCRIBER ID 24 BINARY BITS 24 BINARY BITS MOBILE COUNTRY CODE (MCC) SHORT SUBSCRIBER IDENTITY (SSI) MOBILE NETWORK CODE (MNC) 10 BITS 3/4 DIGITS 14 BITS 4/5 DIGITS 24 BINARY BITS 7/8 DECIMAL DIGITS TETRA Identity

  6. Family of TETRA Addresses HOME NETWORK (ITSI) INDIVIDUAL TETRA SUBSCRIBER IDENTITY (GTSIs) GROUP TETRA SUBSCRIBER IDENTITIES (ATSI) ALIAS TETRA SUBSCRIBER IDENTITY VISITING NETWORK (V)ATSI VISITING ALIAS TETRA SUBSCRIBER IDENTITY (V)GTSIs VISITING GROUP TETRA SUBSCRIBER IDENTITIES

  7. How many numbers for a TETRA Terminal? • One Family of Home Network TSIs • One Individual TETRA Number ITSI • One Alias of individual Number ATSI • One or more TETRA Group Numbers GTSIs • One or more Families of Visiting Network TSIs • Unassigned SSI (USSI) • One Visiting Alias (V)ATSI • One or more Visiting Group Numbers (V)GTSIs • One telephone number (E.164)

  8. Numbering & Addressing • Numbering and Addressing Plans • Basic Numbering • Enhanced Numbering • Leading Digit Dialling • Call Scenarios • Home & Foreign Network • PABX & E.164

  9. MOBILE COUNTRY CODE (MCC) SHORT SUBSCRIBER IDENTITY (SSI) MOBILE NETWORK CODE (MNC) 3/4 DIGITS 4/5 DIGITS 7 / 8 DECIMAL DIGITS Linking TETRA Addressing & Numbering TETRA NUMBER TETRA ADDRESS

  10. Basic TETRA Number SSI • Communication within home TETRA Network • No need for algorithm selection • Home dialling algorithm applies • decimal value range from 0 to 16,777,215 (224) • User may dial between 1 and 8 digits • 7 digit with max value 9 999 999 recommended • Decimal digits are converted to binary SSI

  11. Enhanced TETRA Numbering • Communication beyond home TETRA Network e.g. another TETRA, PABX, PSTN, ISDN • Need for algorithm selection • Selection of Dialling Plan • Direct number entry via keypad, Mode selection buttons, Soft key menu selection, Leading Digit Dialling • DTMF can be used to access services outside TETRA networks during a call.

  12. Leading Digit Dialling • Leading Digit Dialling is the only dialling algorithm selection defined in TR 102 300-5 • Recommended way to achieve commonality between manufacturers’ implementations • Predefined value for E.164 gateway access is 16,777,184 • Predefined value for ISDN gateway access is 16,777,185 • 14 more values reserved for future use.

  13. Dialling methods • Relative dialling • Shortened dialling The last digits of the own SSI are replaced with the dialled digits to form the identity of the subscriber to be called The last digits of a predefined base address (SSI) are replaced with the dialled digits to form the identity of the subscriber to be called

  14. Private Numbering Plans • A private numbering plan uses a number space which is independent of TETRA SSI or E.164 numbering. • The TETRA MoU has prepared two specifications for private numbering: • Fleet Specific Short Number (FSSN, TTR001- 7) • Radio User Number (RUN, TTR001 - 18) • The TETRA Standard describes Short Number Addressing (SS-SNA, ETS 300 392-10-7), which provides a private numbering space of 256 addresses.

  15. Fleet Specific Short Number FSSN uses one million addresses from the SSI addressing space with a base address of 15.000.000. The calling user may dial the FSSN of up to 6 digits, which are added to the base address. The Air Interface provides the transposed number (15.nnn.nnn) to the infrastructure where the number is translated to the real SSI of the called subscriber. The calling subscribers identity is translated to the associated FSSN number and presented as CLI at the called terminal. The FSSN numbering space may be re-used by several user organisations.

  16. Radio User Number The RUN identifies the user rather than the radio terminal. When the user authenticates himself (RUA, TTR001-17), part of the process is entering his RUN, which is mapped by the system to the ITSI of the used radio terminal. The infrastructure resolves the called ITSI from the called RUN for the routing of the call as well as the calling RUN from the calling ITSI for display as the CLI at the called terminal. The call setup message is addressed to the SSI identifying the RUN application. The RUN is carried in the ESN field in the same way as an E.164 number.

  17. Call Scenarios • Call originating and terminating on same Network, • Call originating and terminating on different Networks • Calls between TETRA and PABX • Calls between TETRA and E.164 (PSTN, GSM, TETRA!)

  18. 9 2 MCC MNC SSI 1 MNC SSI MCC Scenario 1- Home Network 1 2 3 4 5 6 TETRA 1 2 3 4 5 6 7 Calling Subscriber

  19. ISI MCC MNC SSI ISI ISI MNC SSI MCC Scenario 2 - Foreign TETRA Net TETRA (UK) TETRA (UK) TETRA (France)

  20. PABX GW MNI PABX GW SSI PABX Subscriber Number (24 digits) PABX GW PABX GW PABX (A) PABX (B) Scenario 3 - PABX TETRA (A) TETRA (B ) ISI

  21. E.164 GW MNI E.164 GW SSI E.164 Subscriber Number (24 digits) ISI E.164 GW E.164 GW E.164 GW MNI E.164 GW SSI External Subscriber Number (24 digits) UK Phone German Phone Scenario 4 - E.164 (PSTN, GSM) TETRA (UK) TETRA (Germany) E.164 (PSTN, GSM)

  22. TETRA IP • TETRA uses IP numbers in the same way as any other IP network • Individual TETRA user can have a fixed IP number or the number can be allocated dynamically • In order to do the air interface signalling, TETRA IP numbers need to be mapped to TETRA ITSIs

  23. Conclusions • TETRA dialling plans provide the benefits of flexibility and interoperability to meet the huge variety of needs of professional users • TETRA numbering plans have flexibility to efficiently deal both with simple fleet numbers & full E.164 international numbers • TETRA addressing alignment allows for future interoperability/ roaming with GSM

  24. Family of TETRA Addresses (ITSI) INDIVIDUAL TETRA SUBSCRIBER IDENTITY (GTSIs) GROUP TETRA SUBSCRIBER IDENTITIES (ATSI) ALIAS TETRA SUBSCRIBER IDENTITY HOME NETWORK (V)ATSI VISITING ALIAS TETRA SUBSCRIBER IDENTITY (V)GTSIs VISITING GROUP TETRA SUBSCRIBER IDENTITIES VISITING NETWORK

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