Presented by: The Project 25 Technology Interest Group ... · The RFSS or Radio Frequency...

Copyright Project 25 Technology Interest Group

Project 25 Update

Presented by:The

Project 25 Technology Interest Group

http://www.project25.org

As presented at:

Copyright Project 25 Technology Interest Group Slide 2

Project 25/TIA Standards Process Map

APIC: TIA-P25 Interface via MoU

• Develops user requirements into standards proposals

• Serves as venues for needed clarifications

• Manages documents• All organizations get

a vote

APIC: APCO Project 25 Interface CommitteeTIA: Telecommunications Industry Association

Joint Participation

P25 Steering Committee

P25 User Needs

Committee

User Needs Task Groups

User voice

• Define requirements for standardization;

• Adopt or reject TIA work

• Only Users vote• Develops concept

documents for P25

TIA TR-8 Committee

TR-8 CommitteeSubcommittees

Subcommittee Working Groups

Industry voice

• Develop consensus standards with guidance from APIC and users

• Only TR-8 members vote

APICWorking Groups

APICTask Groups


Project 25 Proposal Process

TIA Bulletin

Requires 2/3 approval

among votingmembers. Reviewed

every 5 years.

ANSI Standard

ANSI approved.

All interestedparties vote. Reviewed every 5 years.

Proposalsubmitted

to P25Steering

Committee

WorkingDocument

onproposal

developed in

APCO P25

InterfaceCommittee

or TaskGroup

P25Steering

CommitteeVotes to

moveWorking

DocumentForward toTIA (TR-8)

P25Steering

Committeeaccepts,

rejects, orrequests

modifications to proposalUser Needsassists with

requirementsclarifications

Process is Iterative

Input

Output

TIA Standard

TIA approved.

All interestedparties vote.Reviewed every 5 years.

TR8Subcommittee

TIA Standards can be upgraded to ANSI Standards via ANSI/TIA processes


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


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.


Project 25 System Interfaces

Inter RF Inter RF SubSystemSubSystem

Interface Interface (ISSI)(ISSI)

Telephone Telephone Interconnect Interconnect

(PSTN)(PSTN)

Subscriber Data Subscriber Data Peripheral Peripheral Interface Interface e.g. MDTe.g. MDT

Data InterfaceData Interfacee.g. Databasese.g. Databases

Other P25Systems

Gateway

NetworkManager

Consoles

SubscriberUnits

Repeaters

PSTN

System

Common Air Common Air Interface Interface

(CAI)(CAI)

ConsoleConsoleSubSystemSubSystem

Interface Interface (CSSI)(CSSI)

Fixed Fixed SystemSystem

Interface Interface (FSI)(FSI)

P25 RFSubSystem

(RFSS)


Project 25 RF SubSystemThe 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


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.


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 (E d) – describes the data interface between the Project 25 radio system and the external data network including connections to computers, data networks, external datasources, etc.

• Telephone interconnect interface (E t) – 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 (E n) – describes the interface to the radio system that allows administrators to control and monitor network fault management and network performance management. (Future work)


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


Project 25 Activity…Work In Progress


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

• Wireline Intefaces- ISSI (Inter Sub-System Interface)

- Station, Console, and other subsystem interfaces


TDMA


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


P25 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

• Support for FDMA subscriber units in TDMA systems- Interoperability & 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 efficiency- Compatible and interoperable vocoders- Encryption interoperability (DES or AES)

• Vocoders- Dual rate for FDMA interoperability- Accommodate enhanced vocoders for improved voice quality


Wireline InterfacesISSI, Fixed Station Subsystem Interface and Console SubSystem Interfaces


RFSS 1

HLR/VLR

ISSI, Fixed Station Subsystem Interface and Console SubSystem Interfaces

SYSTEM 1

Console SubSystem

CSSIAdditional

Conventional Coverage Area

FSSI

RFSS 1

HLR/VLR

SYSTEM 2

ISSI

ISSI Inter Sub System InterfaceFSSI 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


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.


Wireline Standards Documentation

Compliance Assessment Plan

FSI

Scope 2

FSI Scope 1

CSSI

Scope 2

CSSI Scope 1

ISSI

Scope 2

ISSI Scope 1

TBD

TBD

TBD

Interop testing

ConformancePerformanceMethods of Measure

Messages and

Procedures

Overview

Next In Line

DevelopingBallotingTIA Published


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


ISSI – Interconnecting Networks

NETWORK BNETWORK A

Users from Network A and B

communicate using ISSI

ISSI

Talk Group A

The ISSI is an all-IP system interface using SIP and RTP to achieve voice communications between Project 25 radio

networksSIP = Session Initiation Protocol (call setup and tear down)

RTP = Real Time Transport Protocol (traffic bearer)


NETWORK B

ISSI - Coverage Extension

NETWORK A

Users from Network A roam into B and

communicate using ISSI

ISSI

Talk Group B


NETWORK B

NETWORK A

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 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

ISSI Agency Interoperability - Roaming

ISSI


Thank You! PTIG Commercial Members:Aeroflex, Inc.Avtec, Inc.BearCom Wireless WorldwideBechtel CorporationCatalyst Communications TechnologiesCTA Communications ConsultingDaniels Electronics Ltd.Datron World Communications Inc.Digital Voice Systems, Inc.EADS Public Safety Inc.EFJohnson CompanyEtherstack Ltd.Federal Engineering, Inc.General DynamicsGenesis GroupHoneywell Batteries, Global Technology Systems, Inc .Icom AmericaKenwoodMidland Radio CorporationMotorola, Inc.Pantel International Inc.RELM Wireless CorporationTait Electronics - Radio CommunicationsTechnisonic Industries Ltd.Thales Communications Inc.TMC Radio Pty LtdTyco Electronics - M/A-COMVertex Standard, Inc.Westel RF Technology CorporationWireless PacificWulfsberg ElectronicsZetron, Inc.

Presented by: The Project 25 Technology Interest Group ... · The RFSS or Radio Frequency...

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