Government of the District of Columbia Office of the Chief Technology Officer Public Safety Wireless Communications Wireless Accelerated Responder Network (WARN)

1
Government of the District of ColumbiaOffice of
the Chief Technology Officer Public
Safety Wireless Communications Wireless
Accelerated Responder Network (WARN)
2
DC Wireless PS Communications
3
WARN Overview

• Dedicated to public safety
• 2 x 1.25 MHz channels in 700 MHz whitespace with
  experimental license
• N1 (same frequency use at three sectors per
  site)
• Flash-OFDM
• 12 sites (3 sectored)
• Secure network within District WAN
• On separate SONET ring no intermediate
  electronics
• Uses same sites as LMR net using existing
  redundant infrastructure
• PC Card and PAD Access
• App and user QoS
• 19 Agencies, including three Federal, and over
  200 users

4
WARN Results

• Average throughput of 1 Mbps and 300 kbps on
  downlink and uplink (respectively)
• 200 kbps at 95th percentile outdoor coverage - 68
  mi2 total
• High Reliability 99.997 availability in 2006
• Low latency (30 50 mS)
• Main use around significant events, driven by
  streaming video (up to 10 Gbytes in day with 56
  active users)

5
WARN Results (Cont.)

• First use January 20, 2005
• Six users streamed 5 GBytes during the
  Presidential Inauguration in 2005
• Motion JPG video application caused overloading
  condition on downtown cells
• Average more than 25 Gbytes per month
• Applications
• GIS (3D imagery)
• Streaming Video
• Web
• E-Mail
• Desktop Extension

6
WARN Lessons Learned

• Video
• Tradeoff in codecs between flexibility and
  efficiency
• 100 kbps is adequate for most video applications
  using advanced codecs
• Need dymanic codecs and blocking to properly
  manage access and QoS
• Applications
• Need to plan now for interoperable data (esp.
  video)

• Bandwidth control is critical Much different
  than voice
• Hundreds of times different load between users.
• Managing capacity real-time will be crucial.
• Throughput
• Cell edge throughput critical, especially for
  streaming video
• Devices need PDAs, embedded modems, AVL modems,
  small form factors in addition to PC Cards

7
National Capital Region Interoperability Program

• NCR is a UASI designated Metropolitan Washington,
  DC area 18 jurisdictions over 3 states with
  state and local governance
• NCR Interoperability Program Fixed Broadband,
  Regional Wireless Broadband Network (RWBN), Data
  Exchange Hub

• RWBN Regional broadband network(s) with
  seamless interoperability
• Waiver for broadband operations ongoing (11/14
  reply comment) in advance of Eighth NPRM,
  overwhelming national support
• Working with Region 20 broadband allowance in
  R20 plan
• Clear TV spectrum due to LP-TV
• RFP out to build network, contract expected end
  of year
• First phase build-out in 1H07
• Projecting 100 sites to cover 2,500 square
  miles, delivering peak speed of more than 930
  Mbps with only one 1.25 MHz channel region-wide
• Seeking PC Cards, AVL Modems, PDAs, and embedded
  modems
• Contract rider requested for CA, AZ, MD, and VA

8
Final Thoughts

• 700 MHz vs. 4.9 GHz
• 700 leverages LMR infrastructure
• Is a national solution (not just urban)
• Provides in-building coverage
• COTS broadband standards should be leveraged to
  tap in to exponential improvements in spectral
  efficiency, features as well as cost effective
  for infrastructure based communications
• How can MESA help?
• 100 communications
• Develop cost-effective means to deliver the last
  5 and a solution in the absence of
  infrastructure
• Augment broadband coverage to match LMR link
  budget while maintaining low power solutions
• PC Cards, PDAs, embedded modems
• Push for global solutions that further drive cost
  model down (esp. for features that differentiate
  public safety and COTS)

9
(No Transcript)