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IWCE 2010: Wireless Video Surveillance 101
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IWCE 2010: Wireless Video Surveillance 101


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Presentation from IWCE 2010 "Wireless Surveillance 101" workshop, focused on high-bandwidth wireless infrastructure for fixed and mobile real-time video surveillance. Read notes on the workshop here: …

Presentation from IWCE 2010 "Wireless Surveillance 101" workshop, focused on high-bandwidth wireless infrastructure for fixed and mobile real-time video surveillance. Read notes on the workshop here:

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  • 1. Wireless Infrastructure for Security & Surveillance Ksenia Coffman, Firetide IWCE 2010: Wireless Surveillance 101 March 9, 2010 1
  • 2. Agenda Why wireless? Wireless options Considerations for wireless video systems Case studies Municipal public safety; Industrial operations; Transportation security Planning a successful wireless system 2
  • 3. Why Wireless? Cost savings Deploy virtually anywhere Mobility and flexibility Extend or back-up wired infrastructure 3
  • 4. Who Needs Wireless Surveillance? Public Safety Education Industrial Transportation Government Utilities Telecom 4
  • 5. Wireless Challenges Availability of channels & spectrum RF interference Dynamic RF & physical environment “Trust but verify” attitude required 5
  • 6. Wireless Options 6
  • 7. Wireless Frequency Bands Licensed? Line of site Advantage Disadvantage 900 MHz Unlicensed Not required Improved street-level Lower throughput penetration for video compared to other bands 2.4 GHz Unlicensed Required Better penetration Interference from compared to 5 GHz consumer devices 4.9 GH Licensed Required Reserved for public Requires frequency safety; less coordination with interference other agencies 5 GHz Unlicensed Required Better range and less Lower penetration interference than 2.4 GHz compared to 2.4 GHz 7
  • 8. Point to Point Pros Dedicated connection Highest bandwidth for backhaul Cons Does not scale; no flexibility Single point of failure 8
  • 9. Point to Multi-Point Pros Simplicity of design Cost effective when tall assets are available Cons Limited scalability: bandwidth divided by # of subscribers LOS required to each subscriber unit Base station creates a single point of failure 9
  • 10. Multi-Point to Multi-Point (Mesh) Pros Reach & scalability with multi-hop connections Flexibility – can be deployed a PtP, PtMP or mesh Cons Variable performance from different vendors More complex design vs PtP or PtMP 10
  • 11. What About Throughput? Point to point Up to 1 Gig+ Point to multi-point 20-30 Mbps total capacity typical (divided by # of subscribers) Wireless mesh Can deliver up to 250-300 Mbps in PtP mode or 100-150 Mbps sustained over multiple hops Varies greatly by vendor: from 10-15 Mbps to 100-150 Mbps per radio Numbers listed are usable throughput, not theoretical data rate 11
  • 12. Deployment Scenario: Mesh & PtP 12
  • 13. Deployment Scenario: PtMP 13
  • 14. Deployment Scenario: Linear Mesh District 5 District 4 District 3 District1 District 2 14
  • 15. Not All ‘Wireless Mesh’ Created Equal 15
  • 16. Imagine a Traditional Wired Switch Most efficient mesh utilizes L2 distributed wireless switch architecture (Wired Ethernet infrastructure) 16
  • 17. Now, Give Each Port Wireless Capability (Wired Ethernet infrastructure) 17
  • 18. Separate the Ports… Bingo, a Virtual Ethernet Switch! (Wired Ethernet infrastructure) 18
  • 19. Key Requirements for Video High throughput Low latency < 1.5 ms per hop Low packet jitter (variation in latency) Support for multicast traffic End-to-end QoS & traffic prioritization Specialized infrastructure required APs not suitable for professional video surveillance 19
  • 20. Wi-Fi Access Can Be Useful Live video in Wi-Fi ‘hot spots’ Laptops, PDAs Local and remote viewing Wi-Fi enabled Radio, AP & Camera patrol car 20
  • 21. Mistakes You Can Make 21
  • 22. ERROR: undefined OFFENDING COMMAND: ‘~ STACK: