public safety communications research program overview · public safety communications research...
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Public Safety Communications Research Program Overview
Department of Commerce – Boulder Labs
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Agenda
• PSCR Overview• Key PSCR Efforts
– Project 25 Compliance Assessment Program– ISSI Simulation and Modeling Tool– 700MHz Broadband Demonstration Network– Voice over Internet Protocol (VoIP)– Audio Quality Testing– Video Quality Testing
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Public Safety Communications Research Program
Located at the Department of CommerceBoulder Labs in Colorado
The PSCR Program is a joint
effort between:
NIST’sOffice of Law
Enforcement Standards(OLES)
and
NTIA’sInstitute for
Telecommunication
Sciences (ITS)
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PSCR Vision and Mission
VISIONThe response community
nationwide can exchange voice and data seamlessly to
effectively respond to any incident or emergency.
Seamless voice and data exchange refers
to the ability of the response
community to interoperate with each
other on demand, in real time, when
needed, and when authorized.
MISSIONTo fulfill this vision, PSCR will act
as an objective technical advisor and laboratory to OIC
and public safety to accelerate the adoption and
implementation of only the most critical public safety
communication standards and technologies.
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PSCR PortfolioPSCR Portfolio
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Project 25 Compliance Assessment Program
(P25 CAP)
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Project 25
Project 25 Standards are Focused on Achieving Goals that Benefit the Public Safety Community
P25 Goals Impact on Public Safety Community
Graceful Migration Allows an agency to move from a legacy system to a new system easily
Competition in System Life-Cycle Procurements
Users can select from multiple vendors that build innovative products to the same standards
Interoperability Supports the sharing of information via voice and data signals on demand, in real time, when needed, and as authorized
Practitioner Driven Approach
Vendors develop public safety communications products that are driven by practitioner needs and requirements
User Friendly Equipment Radio systems operate in consistent and familiar ways requiring the least mental and physical interaction by the operator
Spectrum Efficiency Takes advantage of finite spectrum resources so more users can operate within limited bandwidths
Robust Compliance Assessment Program
A comprehensive P25 assessment program will ensure that vendor products are tested and can be trusted to be P25-compliant
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Project 25
There are eight P25 interfaces to be standardized, however…
Console Subsystem Interface (CSSI)
Telephone Interconnect
Interface
Data Network Interface
NetworkMgmt.Interface Inter-RF
Subsystem Interface (ISSI)
RF Subsystem ARF Subsystem A
RF Subsystem B
Base Station or Fixed Station Radio Mobile Radio
Subscriber Data
Peripheral Interface
Common Air Interface
(CAI)
Portable Radios
(CAI)(CAI)
(FSSI)
Dispatch Console
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Project 25
…there are four P25 interfaces that we are focusing on right now.
• The interfaces that are key to interoperability– The Common Air Interface (CAI)– The Inter‐subsystem Interface (ISSI)
• Two other important interfaces– The Console Subsystem Interface (CSSI)– The Fixed Station Subsystem Interface (FSSI)
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Key P25 CAP Program Features
• Program will review 1st, 2nd, or 3rd
party labs who will participate in the P25 CAP program
• Manufacturers must use approved laboratory to participate in the program
• Participating manufacturers must publish a Suppliers Declaration of Compliance (SDoC) and a
Summary Test Report (STR)– SDOCs/STRs
will be housed on a common website
(www.rkb.us), and DHS grantees are expected to purchase equipment with approved SDOCs/STRs
• Initial phase of the program is focused on the Common Air Interface (CAI) and the Inter‐RF
SubSystem
Interface (ISSI)
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Documentation
• Supplier’s Declaration of Compliance• A formal declaration of compliance created for a
particular set of P25 compliance tests defined by the P25 CAP.
• Summary Test Report• A predefined format for manufacturers to
present results to a subset of tests.
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• In May 2009, DHS OIC recognized 8 laboratories that can now perform compliance testing as part of the P25 CAP:
• Labs were recognized for Performance and Interoperability testing for products implementing the P25 CAI.
• SDOCs/STRs
are required for CAI purchases using Federal grant money as of November 6, 2009
• In January 2010, the first Supplier’s Declaration of Compliance and Summary Test Reports were posted on the DHS Responders
Knowledgebase Website –
www.rkb.us• Five manufacturers have posted their SDoCs
and STRs
on the
publicly available website.
Status of the P25 CAP
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Inter‐RF Subsystem Interface (ISSI) Simulation and Modeling Tool
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• Provides the public
safety community with
the performance
analysis tools needed to
better understand
emerging network
technologies in order to
make decisions on
planning and purchasing
of equipment related to
the ISSI.
The tool is available for free download at:
http://www‐x.antd.nist.gov/p25_issi/
ISSI Modeling and Simulation
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ISSI Test Tool (ITT)
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ITT
• Allows public safety users to ensure that systems they purchase will meet their
requirements and satisfy the applicable standards developed for the ISSI, a key interface for interoperability.
• Since these types of test tools are highly specialized, the market for selling them is extremely narrow and limited.
The tool is available for free download at:
http://www.pscr.gov/outreach/itt/itt_downloads.php
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700MHz Broadband Demonstration Network
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Why a Demo Network for Public Safety?
• Public Safety has been licensed to use 700MHz spectrum but there are currently no government or
independent laboratory facilities in the United States to test and demonstrate the public safety
specific LTE implementation requirements– PSCR is creating this network to provide manufacturers
with a site for early deployment of their systems, an opportunity to evaluate them in a multi‐vendor
environment, and create integration opportunities for commercial service providers.
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PSCR Demo Network Project Plan
• Generate interest from broadband vendors to develop a 700 MHz broadband equipment ecosystem
– Band Class 14 (D Block & Public Safety Block), Long Term Evolution (LTE)
– Stimulate early development for public safety systems (e.g. Waiver Orders)
– Support the commercial 3GPP standards process with public safety requirements
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PSCR Demo Network Project Plan (cont.)
• Demonstrate broadband air‐interface and core network capabilities
– Proof of concept, Improve quality for future systems, Create new technology and requirement benchmarks
– Evaluate broadcast capabilities for wide area, simultaneous data delivery
• Interoperability with existing cellular, broadband and LMR technology
– Roaming functionality with LTE and non‐LTE systems– How QoS, billing, priority, pre‐emption and applications
work when roaming• Validation of key public safety functionalities and
requirements
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Demo Project Stakeholders
NOTE: This is a partial stakeholder list
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Working Groups
• Four Working Groups– Evaluation Test Working Group– Application Demonstration Working Group– Network Architecture Working Group– Waiver Recipient Working Group
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Demonstration Network Outcomes
• Stakeholders will be able to deploy their equipment in a neutral host network.
• Inform public safety on how this new technology can meet their requirements.
– They do not have to potentially waste capital expenditures for evaluating a network technology.
• Information gleaned can inform standards bodies.
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Voice over Internet Protocol (VoIP)
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•
PSCR, with sponsorship from DHS OIC, developed and published the Bridging Systems Interface (BSI) Core Profile
with key features that can be implemented quickly.–
A collection of existing standards, parameters, and values
necessary for VoIP‐based devices to connect with one another.
–
Supports group voice communications across multiple‐ vendors’
bridging solutions.
–
Brought together six of the leading VoIP vendors to demonstrate interoperability using the specification.
•
Developed and Published BSI Best Practices Document–
Administrative information for contracting officials, chiefs,
etc.–
Technical guidance for system managers, system planners,
etc.
VoIP Outcomes
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Audio Quality Testing
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Audio Quality TestingAudio Quality TestingAudio Quality Testing
• Firefighter reports showed that some background noises
created by firefighting equipment can interfere with
digital communication. • PSCR worked with practitioners
to develop and implement tests that measure the operation of
digital radios, and also tested mitigation techniques for the problems.
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AnalogAnalog (no background noise)(no background noise)
P25P25(no background noise)(no background noise)
AnalogAnalog (low air alarm)(low air alarm)
P25P25 (low air alarm)(low air alarm)
Example of the Audio Quality IssueExample of the Audio Quality IssueExample of the Audio Quality Issue
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Audio Quality Project Outcomes
• A technical report was published in June 2008 describing the testing and results.
– Supplemented by a July 2008 report from the International Association of Fire Chiefs, which recommends operational changes for fire agencies using
digital radios.
• Scientifically documenting public safety’s audio issues provided the opportunity to make
improvements to remedy audio quality problems.
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Current Testing Effort
• Intelligibility Test Underway– Measures improvements since 2008 test
• Improvements include vocoder
updates and IAFC Best Practices updates
• Includes law enforcement background noise
– 28 of 32 subjects have completed test• Disciplines include law enforcement, fire, EMS, and
dispatchers
– Results expected to be presented at October P25 meeting
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Video Quality Testing
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PSCR Video Quality Project
• Develop network performance
specifications for public safety video applications
– Bandwidth• Compression• Resolution• Frame rates
– Data (packet) loss– Latency
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Approach
• Develop subjective testing methods for task‐ based video
– ITU‐T Recommendation P.912
• Form a working group of stakeholders: Video Quality in Public Safety (VQiPS)
• Create an classification system to group applications into a manageable number of
cases• Conduct experiments to determine network
specifications for each group
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VQiPS
Working Group
• Provides a central location for organizing video quality specifications (new or existing) for
Public Safety (and supporting) applications• Members:
– Practitioners• Law enforcement, fire, EMS, transportation, etc.• Local, state, Federal
– Government and academic researchers– Industry (manufacturers and integrators)
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Current Video Quality Testing Efforts
• Test parameters:– Target size– Motion in the scene– Scene lighting– Compression (reduced bandwidth)
• Test subjects so far: 37
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Target Size Large, Medium Motion, Good Lighting 512kbps –
100% recognition
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Target Size Large, Medium Motion, Good Lighting 128kbps – 85% recognition
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Target Size Small, Medium Motion, Good Lighting 512kbps – 78% recognition
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Target Size Small, Medium Motion, Good Lighting 128kbps – 59% recognition
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Contact Information
Dereck
OrrProgram Manager for Public Safety CommunicationsNIST Office of Law Enforcement Standards303‐497‐[email protected]
www.pscr.gov