evaluating ieee 802.16 broadband wireless as a communications infrastructure for public safety...
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Evaluating IEEE 802.16 Broadband Wireless as a Communications Infrastructure for Public Safety
Activities
J. Martin, M. WestallSchool of Computing Clemson University
jim.martin/[email protected]
Status Update and Demo
10/1/2007
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WiMAX Project at Clemson Year 1: 10/1/2006 – 9/30/2007
Build a testbed with first generation WiMAX equipment at Clemson University
University, city, and state public safety organizations participate in the test and evaluation
Develop ‘best practices’ document for deploying, managing, and using WiMAX networks for public safety operations
Results available online at: http://people.clemson.edu/~jmarty/publicsafety/PublicSafety.html
Project description (done) WiMAX performance paper: general discussion of how to
map a real WiMAX deployment to actual performance numbers (ongoing)
Testbed measurement results (ongoing) WiMAX best practices: advice on designing and deploying a
WiMAX network (ongoing)
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WiMAX Project at Clemson Year 2: 10/1/2007 – 9/30/2008
Extend the Clemson testbed to include mobile WiMAX devices
Evaluate the performance of a core set of voice, video and data applications in mobile scenarios
Focus on the particular problem of transporting large amounts of video data (e.g., video surveillance and in-car video)
Extend our involvement with the WiMAX Forum
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Project Motivations PI’s Research in broadband access Public safety communications technology
Agency/City owned networks 802.11 mesh WiMAX
State-wide or nation-wide networks 700 MHz by public safety
Public safety applications Middleware, process automation Access data in real-time from the field Video:
Video surveillance Video pulled from vehicles
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802.16e WiMAX Rollout
802.16e (formerly 802.16d) : ‘fixed’, ‘portable’, ‘nomadic’
Single Base Station, point-to-multipoint
Roaming supported by layer 2 or layer 3
Can support a slow moving vehicle
802.16e : ‘mobile’ Sectors – cell-based system, point-to-
multipoint Roaming supported by WiMAX Can support a vehicle moving <70mph
802.16e mesh mode Not on the radar scope
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WiMAX Spectrum Issues WiMAX Forum dictates the product profiles
Initial Mobile WiMAX products will operate at 2.3-2.4 GHz, 2.496-2.69 GHz, 3.3-3.4 GHz and 3.4-3.8 GHz
Fixed WiMAX profiles at 3.5 GHz and 5.8 GHz A number of vendors are lobbying for a 4.9 GHz fixed and
mobile profile (available in 2008 ?) Sprint (and others?) likely to develop offerings for public safety However, at least for the next several years, 4.9 GHz is the best
choice for agency use
700 MHz spectrum is possibly in the future (>5 years out )
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M/A-COM Equipment Airlink:
IEEE 802.16e ‘nomadic’ 5MHz channels at 4.9GHz OFDM 256 FFT Output power:
BS: 27dBm output power Low power client: +20dBm High power client: +27dBm
TDD operation, 10ms frame time, variable US/DS split Supported modulation methods: BPSK (1/2, 3/4), 16
QAM(1/2,3/4), 64QAM(1/2,3/4) Interfaces:
RJ-45 Ethernet 24 V DC Power 4.9 GHz RF and GPS Antenna
Managed by M/A-COM UAS Admin software
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Campus Deployment
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Outdoor Pelco analog PTZ camera (SpectraIV) with IndigoVision 9000E Encoder (with analytics and video mgt software)
DL RSS: -89
DL RSS: No signal
DL RSS: -91
DL RSS: -77
DL RSS: -82
DL RSS: -84
DL RSS: No signal
Surveillance camera
Base station
Subscriber Station Base Station
Waypt SNR Rx Power Modulation SNR Rx Power Modulation
100 13 -91 BPSK ½ 9 -93 QPSK ¾ S. Palmetto
101 30 -71 QAM64 2/3 26 -73 QPSK ¾ S. Palmetto
102 13 -90 BPSK ½ 6 -96 QPSK ¾ S. Palmetto
103 28 -77 QAM64 2/3 23 -76 BPSK ½ Hendrix Rear
104 14 -89 BPSK ½ 5 -96 QPSK ¾ Dorm Loop
105 15 -90 QPSK ½ No Signal Redfern
106 8 -91 BPSK ½ No Signal E-1
107 21 -82 QAM16 ¾ 17 -82 QPSK ¾ E-1
108 R1-Access
109 R1-Lot
110 16 -77 QAM64 2/3 21 -79 QPSK ¾ R1-Lot
111 14 -90 BPSK ½ 9 -94 BPSK ½ R1-Lot
112 22 -84 QAM16 ½ 18 -83 QPSK ¾ Camera
114 R1-Lot
115 Firestation
116 Kite Hill
117 Morrison St
118 Clemson House
119 25 -90 QAM16 ¾ 19 -81 QAM 16 ½ Tillman
120 21 -83 QAM16 ½ 16 -84 QPSK ¾ Hardin
121 28 -82 QAM16 ¾ 19 -82 QPSK ¾ Riggs
122 Sirrine
124 Lowry
126 Sikes Lot
128 Byrnes
129 Shiletter