Evaluating IEEE 802.16 Broadband Wireless as a Communications Infrastructure for Public Safety

Activities

J. Martin, M. WestallSchool of Computing Clemson University

jim.martin/westall@cs.clemson.edu

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 Base Station

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Vida BroadbandHardened 4.9 GHz base stationModel MAVM-VMXBD

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)

Campus Deployment

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Surveillance camera

McAdams

Base station

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Surveillance camera

Base station

DL RSS: -89

DL RSS: No signal

DL RSS: -91DL 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. Palmetto101 30 -71 QAM64 2/3 26 -73 QPSK ¾ S. Palmetto102 13 -90 BPSK ½ 6 -96 QPSK ¾ S. Palmetto103 28 -77 QAM64 2/3 23 -76 BPSK ½ Hendrix Rear104 14 -89 BPSK ½ 5 -96 QPSK ¾ Dorm Loop105 15 -90 QPSK ½ No Signal Redfern106 8 -91 BPSK ½ No Signal E-1107 21 -82 QAM16 ¾ 17 -82 QPSK ¾ E-1108 R1-Access109 R1-Lot110 16 -77 QAM64 2/3 21 -79 QPSK ¾ R1-Lot111 14 -90 BPSK ½ 9 -94 BPSK ½ R1-Lot112 22 -84 QAM16 ½ 18 -83 QPSK ¾ Camera114 R1-Lot115 Firestation116 Kite Hill117 Morrison St118 Clemson House119 25 -90 QAM16 ¾ 19 -81 QAM 16 ½ Tillman120 21 -83 QAM16 ½ 16 -84 QPSK ¾ Hardin121 28 -82 QAM16 ¾ 19 -82 QPSK ¾ Riggs122 Sirrine124 Lowry126 Sikes Lot128 Byrnes129 Shiletter