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Project 25 Update

Project 25 Update. Presented by: The Project 25 Technology Interest Group http://www.project25.org. Presentation Agenda. Project 25 Overview Wireline Interfaces Project 25 Work In Progress. Project 25 Overview. Project 25/TIA Standards Process Map. Industry voice. User voice.

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Project 25 Update

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  1. Project 25 Update Presented by: The Project 25 Technology Interest Group http://www.project25.org

  2. Presentation Agenda • Project 25 Overview • Wireline Interfaces • Project 25 Work In Progress

  3. Project 25 Overview

  4. Project 25/TIA Standards Process Map Industry voice User voice Joint Participation APIC: TIA-P25 Interface via MoU TIA TR-8 Committee P25 Steering Committee APIC Task Groups P25 User Needs Committee TR-8 Committee Subcommittees APIC Working Groups Subcommittee Working Groups User Needs Task Groups • Develops user requirements into standards proposals • Serves as venues for needed clarifications • Manages documents • All organizations get a vote • Define requirements for standardization; • Adopt or reject TIA work • Only Users vote • Develops concept documents for P25 • Develop consensus standards with guidance from APIC and users • Only TR-8 members vote APIC: APCO Project 25 Interface Committee TIA: Telecommunications Industry Association

  5. Project 25 Proposal Process TR8 Subcommittee Output Input Process is Iterative ANSI Standard ANSI approved. All interested parties vote. Reviewed every 5 years. TIA Bulletin Requires 2/3 approval among voting members. Reviewed every 5 years. TIA Standard TIA approved. All interested parties vote. Reviewed every 5 years. Proposal submitted to P25 Steering Committee P25 Steering Committee accepts, rejects, or requests modifications to proposal User Needs assists with requirements clarifications Working Document on proposal developed in APCO P25 Interface Committee or Task Group P25 Steering Committee Votes to move Working Document Forward to TIA (TR-8) TIA Standards can be upgraded to ANSI Standards via ANSI/TIA processes

  6. Project 25 Document Designation • All Project 25 documents will carry a designation of TSB102XYYZ or TIA102XYYZ • Some documents are a TSB (Telecommunications System Bulletin) • Others are TIA (Telecommunications Industry Association) Standards • The four alpha characters following the 102 are designated: • By the left most alpha character (X) • A Services Conventional, Trunked, Encrypted • B Systems Interface Standards • C Equipment Measurements and Specifications • The next 2 alpha characters (YY) designate a particular feature within a category • The last alpha character (Z) designates a particular standards document dealing with a feature • i.e. TIA102BACA ISSI Messages and Procedures

  7. Benefits of Project 25 Standard • Project 25 Standard documents define seven specific interfaces, or connection points, of digital wireless systems. • Enables competing manufacturers to build products that interoperate across those interfaces • Enables agencies to procure interoperable Project 25 products, sub-systems, and systems from competing manufacturers.

  8. System PSTN Project 25 System Interfaces Fixed SystemInterface (FSI) Subscriber Data Peripheral Interface e.g. MDT Subscriber Units Data Interface e.g. Databases Gateway Telephone Interconnect (PSTN) Network Manager Common Air Interface (CAI) Repeaters Consoles Console SubSystem Interface (CSSI) P25 RF SubSystem (RFSS) Inter RF SubSystemInterface (ISSI) Other P25 Systems

  9. Project 25 RF SubSystem The RFSS or Radio Frequency Sub-System • is the heart of the system • provides for processing all calls • group, individual, PSTN • sets up command and control messages • routes voice and data packets • manages subscriber (group) databases • six of the seven standard interfaces connect to the RFSS

  10. Project 25 Interfaces • Common Air Interface - CAI - (Um) –describes the wireless/over-the-air radio access among subscriber radios and between the subscriber radios and the fixed or base station radios • Inter RF Subsystem Interface – ISSI - (G) – describes the interface between systems, permitting users in one system to communicate with users in a different system for expanded coverage. • Fixed Station Interface – FSI - (Ef) –describes the conventional signaling and messages between the radio system and the fixed station by defining the voice and data packets and the command and control messages. • Console Subsystem Interface – CSSI - (Ec) –describes the signaling and messages between the radio system and the console, the position that a dispatcher or a supervisor would occupy to provide commands and support to the personnel in the field. The trunked console interface is part of the ISSI interface.

  11. Project 25 Interfaces (cont.) • Subscriber data peripheral interface (A)–describes the data interface between the Project 25 radio and a data device • Data network interface (Ed)– describes the data interface between the Project 25 radio system and the external data network including connections to computers, data networks, external data sources, etc. • Telephone interconnect interface (Et)– describes the interface between the subscriber and the Public Switched Telephone Network (PSTN) to allow field personnel to make telephone calls. The use of this interface is dwindling due to (1) the availability of commercial cellular networks, and (2) the potential loading impact to the radio system if over used. (Future work) • Network Management Interface (En)– describes the interface to the radio system that allows administrators to control and monitor network fault management and network performance management. (Future work)

  12. Common Air Interface Elements The Common Air Interface CAI integrates and combines all other aspects of the radio system such as Conventional & Trunking control, Encryption, Data, and Over-The-Air-Rekeying. • Encryption • Multi-algorithm • Multi-key • Encrypted Voice, Data, & Control • Trunking • Control Channel • Trunking Signal Blocks • Unit & Group Addressing • CAI FDMA • 12.5 kHz channels • 9.6 kbps • QPSK-c modulation • FDMA channel access • Error correction codes • IMBE vocoder • Conventional • Talk Around • Conventional Signal Blocks • Unit & Group Addressing Over the Air Rekeying OTAR • Data • IP packets • Integrated with Voice and Control

  13. Project 25 FDMA Air InterfaceAggregate Data Rate • Digital voice, 4400 bits/sec • Channel signaling, 2400 bits/sec • Error correction, 2800 bits/sec • Composite signal, 9600 b/s

  14. P25 Features (1)(per APCO P25 System and Standards Definition)

  15. P25 Features (2)(per APCO P25 System and Standards Definition)

  16. Project 25 “Phases” • “Phase 1” defines digital Common Air Interface FDMA work, using a 12.5 kHz channel • “Phase 2” defines additional digital Interfaces, TDMA or FDMA work, achieving 6.25 kHz channel equivalent efficiency • Note: Phase 2 also refers to P25 requirements developed supporting both Phase 1 and Phase 2 systems, such as the ISSI, Fixed Station, and Console interfaces

  17. Wireline InterfacesSignificant Progress in 2006-7

  18. ISSI, Fixed Station Subsystem Interface and Console SubSystem Interfaces SYSTEM 2 SYSTEM 1 RFSS 1 HLR/VLR ISSI RFSS 1 Additional Conventional Coverage Area CSSI HLR/VLR Console SubSystem FSSI ISSI Inter Sub System Interface FSSI Fixed Station Subsystem Interface (conventional interface) CSSI Console Sub System Interface HLR Home Location Register (manages home subscribers) VLR Visitor Location Register (manages visitor subscribers) RFSS Radio Frequency Sub System

  19. Wireline Interface Scope definitions • ISSI • Scope 1 • Trunked Talkgroup call, Unit to Unit call (Individual), Mobility (Subscriber roaming) and Authentication • Scope 2 • Conventional, Data, OTAR (Over The Air Rekeying), Console across ISSI, Supplementary data (call alert, etc.) • Fixed Station Interface • Scope 1 • Voice & Station control for analog/P25 air interface supported over 4-wire (analog) and Ethernet (digital) transport between console and single fixed station. • Console Subsystem Interface • Scope 1 • Uses the Trunked ISSI features and incorporates Conventional ISSI features.

  20. Next In Line TIA Published Developing Balloting Wireline Standards Documentation

  21. ISSI Features • Authentication of roaming radios • Tracking current location of roaming radios • subscriber database management • Voice transport • Project 25 addressing scheme • Unit/Group Call setup & teardown • Home-based PTT services to roaming radios • PTT communications management among roaming and home-based radios

  22. ISSI – Interconnecting Networks Users from Network A and B communicate using ISSI ISSI Talk Group A NETWORK A NETWORK B The ISSI is an all-IP system interface using SIP and RTP to achieve voice communications between Project 25 radio networks SIP = Session Initiation Protocol (call setup and tear down) RTP = Real Time Transport Protocol (traffic bearer)

  23. ISSI - Coverage Extension Users from Network A roam into B and communicate using ISSI ISSI Talk Group B NETWORK A NETWORK B

  24. ISSI Agency Interoperability - Roaming Network A user roams into Network B and using the ISSI communicates with Network B users or Network A Network A user can join talk groups with Network B users NETWORK A ISSI NETWORK B Network B users roam into Network A and using the ISSI communicates with Network A users Network B user can join talk groups with Network A users or Network B

  25. Project 25 Activity…Work In Progress

  26. Project 25 Work In Progress • User Requirements • Project 25 Statement Of Requirements (SOR) updates • Project 25 Interoperability • Document Updates - Trunking • Planning for Project 25 Compliance Assessment Program • Encryption • Document Updates - OTAR • Inter KMF Key Sharing • TDMA • Air Interface • Project 25 FDMA and TDMA Interoperability

  27. Drivers for TDMA • FCC - Spectral Efficiency • 6.25 kHz efficiency ruling • 2-slot in 12.5kHz for 6.25 kHz efficiency • 4-slot in 25kHz for 6.25 kHz efficiency • Additional capacity needed, particularly in urban areas • Smooth migration from FDMA to TDMA • Backwards compatibility with FDMA • TDMA coverage same as FDMA • Improved audio quality

  28. Project 25 TDMA – Attributes • Enhanced FDMA Control Channel • Updates to FDMA CCH to accommodate TDMA traffic channel control and assignment • Controls FDMA and TDMA subscriber units • Interoperability with FDMA for joint operations and migration • Preservation of FDMA subscriber investments • FDMA Conventional Direct mode • Option for TDMA subscribers when outside of coverage area • Two channels in 12.5 kHz or four channels in 25 kHz • Achieves FCC 6.25 kHz channel equivalent efficiency • Encryption interoperability (DES or AES) • Vocoders • Dual rate for FDMA interoperability • Accommodate enhanced vocoders for improved voice quality

  29. TDMA Harmonization Work in process • 9.6 to 12 kbps air link rate for 2-slot TDMA • Modulation • Simulcast improvements for downlink modulation • Dual Rate Vocoder • Baseline Full Rate IMBE & Enhanced Half Rate IMBE • 30 msec slot size • Frame structures defined • Signaling improvements • Bidirectional for transmitting unit takeover • 4-slot TDMA work to follow

  30. Thank You! PTIG Commercial Members: Aeroflex, Inc. BearCom Wireless Worldwide Bechtel Corporation Catalyst Communications Technologies CTA Communications Consulting Daniels Electronics Ltd. Datron World Communications Inc. Digital Voice Systems, Inc. EADS Public Safety Inc. EFJohnson Company Etherstack Ltd. Federal Engineering, Inc. General Dynamics Genesis Group Honeywell Batteries, Global Technology Systems, Inc. Icom America Kenwood Midland Radio Corporation Motorola, Inc. Pantel International Inc. RELM Wireless Corporation Tait Electronics - Radio Communications Technisonic Industries Ltd. Thales Communications Inc. TMC Radio Pty Ltd Tyco Electronics - M/A-COM Vertex Standard, Inc. Westel RF Technology Corporation Wireless Pacific Wulfsberg Electronics Zetron, Inc.

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