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Evaluating IEEE 802.16 Broadband Wireless as a Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007. J. Martin, M. Westall Department of Computer Science Clemson University [email protected] Overview.

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Evaluating IEEE 802.16 Broadband Wireless as a Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

J. Martin, M. Westall

Department of Computer Science

Clemson University

[email protected]


Overview
Overview Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Summary of current research and project status

  • Demo the M/A-COM gear

  • Next steps

  • Proposal for year 2


Summary of current research docsis cable systems
Summary of Current Research: DOCSIS Cable Systems Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • We have developed a simulation model and analytic models.

  • Cisco has ‘donated’ equipment allowing us to build a DOCSIS cable testbed

  • Research objectives:

    • Explore current limitations of DOCSIS

    • Propose and evaluate enhancements

    • Example: problem is that a small number of high bandwidth subscribers can seriously impact the call quality of best effort VoIP (e.g., Vonage style telephony)

    • Problem: DOCSIS favors high bandwidth flows

Toll quality


Summary of current research wimax
Summary of Current Research: WiMAX Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Participating with the WiMAX Forum’s Application Working Group to develop WiMAX simulation models.

  • Research interests involve:

    • Performance analysis

    • Protocol improvement

    • Security vulnerabilities


Wimax tutorial
WiMAX Tutorial Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Specifications

    • 802.16d : ‘fixed’ WiMAX

      • Single Base Station, point-to-multipoint

      • Roaming supported by layer 2 or layer 3

      • Can support a slow moving vehicle if in range

    • 802.16e : ‘mobile’ WiMAX

      • Sectors – like cell based system, point-to-multipoint

      • Roaming supported by WiMAX

      • Can support a vehicle moving <40mph

    • Both modes combined in a single IEEE standard 802.16e-2005 published 2/28/2006

  • Performance (assuming low volume of competing traffic)

    • 20 Mbps over 10 miles if clear line of sight

    • 2 Mbps over 1 mile in city areas


WiMAX Tutorial Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

Our Preference: 4.9 GHz

2.5/3.5 GHz

licensed

5.8GHz

unlicensed

Possible WiMAX Bands for Public Safety

Possible WiMAX Bands for Commercial Use


The clemson proposal year 1
The Clemson Proposal: Year 1 Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Build a testbed with ‘first’ generation WiMAX equipment at Clemson University

  • University, city, and state public safety organizations will participate in the evaluation

  • Develop ‘best practices’ document for deploying and managing WiMAX networks for public safety operations


Critical questions
Critical Questions Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • How can WiMAX best help public safety organizations?

  • Guidance towards spectrum and equipment choices

  • What are the applications to be studied?

  • Any tools that can help with deployment issues?


Year 1 work items
Year 1 Work Items Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Task 1: Testbed

    • Design network, select equipment

    • Deploy network and establish baseline validation

  • Task 2: Evaluation

    • Working with local fire and police organizations, select applications

    • Develop our own test applications

    • Perform evaluation

  • Task 3: Disseminate results

    • Develop guidebook that identifies WiMAX network best practices for public safety missions

    • Present project at a public safety conference

  • Timeline:

  • Task 1

    • Complete end of July

  • Task 2

    • Scenarios loosely defined in the Workshop held March 2007

    • Test applications deployed in Task 1

    • Evaluation complete end of August

  • Task 3

    • Guidebook complete by 9/30/2007


Equipment 1 bs 4 sss
Equipment: 1 BS, 4 SSs Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

Base station : 4.9 GHz Hardened BS (MAVM-VMXDB)

Client station: 4.9 GHz Low Power Hardened Client (MAVM-VMCLH)


M a com equipment
M/A-COM Equipment Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Airlink:

    • IEEE 802.16e function – although just supports Fixed/Nomadic clients

    • 5MHz channels at 4.9GHz

    • 27dBm output power

    • TDD operation, 10ms frame time, variable US/DS split

  • Interfaces:

    • RJ-45 Ethernet

    • 24 V DC Power

    • 4.9 GHz RF and GPS Antenna

  • Managed by M/A-COM UAS Admin software


Testbed lab network
Testbed: Lab Network Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

Best effort traffic

192.168.90.254

Internet Gateway

Linux host

192.168.90.2

100/1000

Switch

Wireless channel

100/1000

Switch

Subscriber Station

192.168.90.251

Base Station

192.168.90.252

192.168.90.1

UAS laptop

UGS-based flow

Linux host

192.168.90.11

Mac:00:08:74:c9:99:33

Linux host

192.168.90.10

Mac:00:08:74:c9:97:1b


Validation
Validation Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Applications

    • TCP/UDP network performance test tools

    • VoIP using Asterisk

    • Video streaming

      • IndigoVision surveillance camera

        • Plan to order high end, rugged Pelco analog PTZ camera (SpectraIV) with IndigoVision 9000E Encoder (with analytics and video mgt software)

      • Camcorder

      • Web Cams


Validation1
Validation Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Metrics (beyond the lab)

    • External statistics from performance tools (RTT, jitter, loss, throughput)

    • Extract SNMP statistics from the BS and SS

    • Application specific metrics:

      • VoIP stats

      • Streaming stats

  • Methodology (beyond the lab)

    • For a given deployment, create a MAP that correlates performance (application performance, power levels) to location

    • Develop a 4.9 GHz channel model and contribute this to the WiMAX Forum


Testbed trial scenarios
Testbed Trial Scenarios Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Deployment #1: campus-wide/city coverage

  • Deployment #2: event coverage


Deployment 1 area coverage
Deployment #1: Area Coverage Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Broadband wireless coverage of portions of campus


Deployment #2: Event Coverage Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Broadband wireless coverage setup for football game day


Year 2 plan
Year 2 Plan Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

  • Task 1: Extend the testbed with mobile WiMAX

  • Task 2: Validate impact of mobility on public safety applications

  • Task 3: Address the issue of handling large amounts of video during public safety events

  • Task 4: Further our involvement with the WiMAX Forum

  • Task 5: Disseminate results and lessons learned


Mobile wimax testbed
Mobile WiMAX Testbed Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007


Year 2 proposed schedule
Year 2 Proposed Schedule Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

10/07

11/07

12/07

1/08

2/08

3/08

4/08

5/08

6/08

7/08

8/08

9/08

10/08

task 1.1

task 1.2

task 1.3

task 2.1

task 2.2

task 2.3

task 3.1

task 3.2

task 4.1

task 5.1

task 5.2


Year 2 Proposed Schedule Communications Infrastructure for Public Safety Activities Demonstration 7/2/2007

Task 1 - Design and deploy the testbed upgrade

1.1 select equipment

1.2 design network

1.3 deploy and test network

Task 2 – Application analysis

2.1 VoIP

2.2 video streaming

2.3 other select applications for trial use by Clemson fire and police

Task 3 –Video stream management

3.1 build high load video scenario

3.2 develop and validate distributed control capability

Task 4 - WiMAX Forum participation

4.1 – contribute a white paper on public safety application requirements

4.2 - attend meetings (throughout the year)

Task 5 - Dissemination

5.1 – update the ‘best practices’ guide

5.2 - update project web site

5.3 - public safety technology conferences (throughout the year)


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