Wireless Infrastructure for Security & Surveillance
               Ksenia Coffman, Firetide
         IWCE 2010: Wireless S...
Agenda
Why wireless?
Wireless options
Considerations for wireless video systems
Case studies
   Municipal public safety; I...
Why Wireless?


Cost savings
Deploy virtually anywhere
Mobility and flexibility
Extend or back-up wired
infrastructure



...
Who Needs Wireless Surveillance?




Public Safety       Education               Industrial        Transportation




    ...
Wireless Challenges


Availability of channels & spectrum
RF interference
Dynamic RF & physical environment
“Trust but ver...
Wireless Options




                   6
Wireless Frequency Bands

          Licensed?    Line of site       Advantage           Disadvantage
900 MHz Unlicensed   ...
Point to Point




Pros
   Dedicated connection
   Highest bandwidth for backhaul
Cons
   Does not scale; no flexibility
 ...
Point to Multi-Point




Pros
   Simplicity of design
   Cost effective when tall assets are available
Cons
   Limited sca...
Multi-Point to Multi-Point (Mesh)




Pros
   Reach & scalability with multi-hop connections
   Flexibility – can be deplo...
What About Throughput?

   Point to point
        Up to 1 Gig+
   Point to multi-point
        20-30 Mbps total capacity t...
Deployment Scenario: Mesh & PtP




                                  12
Deployment Scenario: PtMP




                            13
Deployment Scenario: Linear Mesh



                                                   District 5




                    ...
Not All ‘Wireless Mesh’
    Created Equal




                          15
Imagine a Traditional Wired Switch
Most efficient mesh utilizes L2 distributed wireless switch architecture




          ...
Now, Give Each Port Wireless Capability




          (Wired Ethernet infrastructure)




                                ...
Separate the Ports…
           Bingo, a Virtual Ethernet Switch!




(Wired Ethernet infrastructure)




                 ...
Key Requirements for Video

High throughput
Low latency < 1.5 ms per hop
Low packet jitter (variation in latency)
Support ...
Wi-Fi Access Can Be Useful

Live video in Wi-Fi ‘hot spots’
Laptops, PDAs
Local and remote viewing




                  W...
Mistakes You Can Make




                        21
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OFFENDING COMMAND: ‘~
STACK:
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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: http://kseniacoffman.wordpress.com/2010/03/11/definitions-of-wireless-mesh/

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IWCE 2010: Wireless Video Surveillance 101

  1. 1. Wireless Infrastructure for Security & Surveillance Ksenia Coffman, Firetide IWCE 2010: Wireless Surveillance 101 March 9, 2010 1
  2. 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. 3. Why Wireless? Cost savings Deploy virtually anywhere Mobility and flexibility Extend or back-up wired infrastructure 3
  4. 4. Who Needs Wireless Surveillance? Public Safety Education Industrial Transportation Government Utilities Telecom 4
  5. 5. Wireless Challenges Availability of channels & spectrum RF interference Dynamic RF & physical environment “Trust but verify” attitude required 5
  6. 6. Wireless Options 6
  7. 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. 8. Point to Point Pros Dedicated connection Highest bandwidth for backhaul Cons Does not scale; no flexibility Single point of failure 8
  9. 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. 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. 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. 12. Deployment Scenario: Mesh & PtP 12
  13. 13. Deployment Scenario: PtMP 13
  14. 14. Deployment Scenario: Linear Mesh District 5 District 4 District 3 District1 District 2 14
  15. 15. Not All ‘Wireless Mesh’ Created Equal 15
  16. 16. Imagine a Traditional Wired Switch Most efficient mesh utilizes L2 distributed wireless switch architecture (Wired Ethernet infrastructure) 16
  17. 17. Now, Give Each Port Wireless Capability (Wired Ethernet infrastructure) 17
  18. 18. Separate the Ports… Bingo, a Virtual Ethernet Switch! (Wired Ethernet infrastructure) 18
  19. 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. 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. 21. Mistakes You Can Make 21
  22. 22. ERROR: undefined OFFENDING COMMAND: ‘~ STACK:
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