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Dialling, Numbering & Addressing

Dialling, Numbering & Addressing. Pieter der 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 der 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 Definition of terms(as used in this presentation)

  4. TETRA Dialling & MMI ID exchange between user and terminal Leading Digit dialling - ETR 300-5 Display scrolling Number presentation (CLI & TPI) with mnemonics Soft keys 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 Addressing

  6. 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

  7. X.121 ITU Recommendation X.121 Numbering Plan for Data Networks E.212 ITU Recommendation E.212 Numbering Plan for Public Land Mobile Terminals, e.g. GSM TETRA Addressing Plan

  8. Numbering & Addressing • Numbering and Addressing Plans • Basic Numbering • Enhanced Numbering • Leading Digit Dialling • 4 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. 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.

  11. Basic TETRA Number • 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 • Incorrect numbers are rejected.

  12. 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.

  13. Leading Digit Dialling • Leading Digit Dialling is the only dialling algorithm selection defined in ETR 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.

  14. 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!)

  15. 9 2 MCC MNC SSI 1 MNC SSI MCC Scenario 1 - Home Network TETRA

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

  17. 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

  18. 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)

  19. 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

  20. 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

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