wireless video surveillance – - bicsi video surveillance – challenge or opportunity? mike intag,...
TRANSCRIPT
Wireless Video Surveillance –Challenge or Opportunity?
Mike Intag, RCDDRegional Systems Engineer,
Firetide
Agenda• Why wireless?• Understanding wireless and RF• Wireless mesh• Case studies
• Construction site security – Burj Dubai Tower, UAE• Mass transit security – MBTA, Boston• Special event security – Super Bowl XLII• Municipal public safety – Dallas PD
• Critical success factors
Why Wireless?
• Cost savings/feasibility
• Mobility and flexibility
• Install quickly
• Extend or back-up cable and
fiber infrastructure
• Deploy virtually anywhere
Industrial TransportationPublic Safety
Hospitality HealthcareRetail Government Utilities
Who Needs Wireless Security & Surveillance?
Education
Wireless Options
Radio Frequency Technology• RF – Information is created using
electromagnetic waves• Frequency is measured in Hertz – cycles
per second
Wireless Frequency BandsLicensed? Line of site Advantage Disadvantage
900 MHz Unlicensed Not required Penetrates trees, drywall
Lower throughput for video compared to other bands
2.4 GHz Unlicensed Required Better penetration compared to 5 GHz
Interference from consumer devices
4.9 GH Licensed Required Reserved for public safety; less interference
Requires frequency coordination with other agencies
5 GHz Unlicensed Required Better range and less interference compared to 2.4 GHz
Lower penetration than 2.4 GHz
Network Topologies
• Point to Point
• Point to Multi-Point(Hub and Spoke, or “Star”)
• Multi-Point to Multi-Point (Mesh)
Understanding Wireless Mesh
Imagine a Traditional Wired Switch
(Wired Ethernet infrastructure)
Now, Give Each Port Wireless Capability
(Wired Ethernet infrastructure)
Separate the Ports – Bingo, a Virtual Switch!
(Wired Ethernet infrastructure)
Wireless Mesh Infrastructure
Self-Forming, Self-Healing
Permanent ObstructionTemporary Obstruction• Wireless mesh is self-healing for resiliency
• Redundant links eliminate single points of failure associated with conventional wireless
• Multiple paths overcome line-of-sight
Why Mesh for Security and Surveillance?
Used along railways and transportation corridors
Mesh in Linear Mode
Case Studies
Public Safety and Security
City of Dallas
Wireless Surveillance – Dallas PD• Goals: Crime deterrence and
investigation
• How used• Fixed camera placement• Overt surveillance • 24/7 monitoring at police
headquarters
• Funding• Grant from a private
foundation• Donations from local
businesses
Project Timeline
• 2005 – 2006 – Pilot at 3 sites in Deep Ellum neighborhood
• March 2006 – issued RFP for downtown project
• Dec 2006 – Feb 2007 – Deployment
• March 2007 – Phase 1 complete ~40 cameras
• Sept 2007 – “Satellite” network in Jubilee Park neighborhood, 14 cameras
• Nov 2008 – Phase 2 in progress ~ 60 cameras
Monitoring at Police HQ• 24/7 monitoring
• Staffed by experienced officers
• Coordinated with patrol to respond to incidents
• Evidence recorded for investigation and prosecution
Jubilee Park Surveillance
24
Software View
"We were pleasantly surprised at the speed of implementation. The mesh enables quick setup of the network without a complete overhaul, while providing excellent bandwidth and security for video streams."
Deputy Police Chief Tom Lawrence, Dallas PD
Key Takeaways• Single backhaul radio solutions are only
good for 3 hops• 10 to 15 cameras per mesh is a good rule
of thumb• Obtaining power on the poles is most
difficult aspect of a municipal deployment• Poles on alternating sides of the street
provide the clearest pathways• Crime cameras really do reduce crime
Commercial and Industrial Security
WI-FI Coverage
Internet
Dubai Tower – Security, VoIP
Transportation Security
InternetGateway
Internet
Security Monitors
MBTA, Boston – Mobile Video
MBTA, Boston – Mobile Video• 300+ busses, 8 cameras
each• Mobile-to-mobile
surveillance• Passenger and operator
safety; liability protection
Security for Special Events
Public Park
Super Bowl 2008
Phoenix PD Glendale PD
Critical Success Factors
Clear Line-of-Sight• Clear line of site between antennas is critical for wireless
communications in the 2.4, 4.9, and 5GHz frequencies
Fresnel Zone
60 % Fresnel ZonePath clearance
Planning a Wireless System
Applications
Requirements
Site survey
Network design
RF engineering
Future growth
Set the Right Expectations• Understand requirements vs ‘nice-haves’• Conduct a formal site survey• Design mesh network for reliable
performance• Specify proper equipment • Optimize as you go• Take advantage of existing fiber assets
Technical Considerations for Video
• Dual radios nodes with minimal latency are required for multiple hops
• Wireless does not like multicasting –multicast groups required
• Panel antennas and 30 degree sectors are ideal for street pole deployments
Technical Considerations, Cont’d
• Mix of 4.9GHz and 5GHz is the optimal solution for citywide public safety deployments
• Make sure you have RF expertise in-house… Or hire a sub for that first wireless deployment
Wireless Saves Time, Money
Buffalo, NY
Dallas, TX
Downtown Chicago
Rockford, IL
NASA Dryden
Denver / DNC ‘08LA County Sheriff’s Dept.
Yuma Intl Airport
