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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 jim.martin/[email protected] Overview.

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slide1

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

jim.martin/[email protected]

overview
Overview
  • 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
  • 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
  • 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
  • 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
slide6

WiMAX Tutorial

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
  • 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
  • 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
  • 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

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
  • 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

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
  • 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
  • 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
  • Deployment #1: campus-wide/city coverage
  • Deployment #2: event coverage
deployment 1 area coverage
Deployment #1: Area Coverage
  • Broadband wireless coverage of portions of campus
slide17

Deployment #2: Event Coverage

  • Broadband wireless coverage setup for football game day
year 2 plan
Year 2 Plan
  • 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
year 2 proposed schedule
Year 2 Proposed Schedule

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

slide21

Year 2 Proposed Schedule

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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