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

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

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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 – PowerPoint PPT presentation

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


1
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/westall_at_cs.clemson.edu

2
Overview
  • Summary of current research and project status
  • Demo the M/A-COM gear
  • Next steps
  • Proposal for year 2

3
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
4
Summary of Current Research WiMAX
  • Participating with the WiMAX Forums Application
    Working Group to develop WiMAX simulation models.
  • Research interests involve
  • Performance analysis
  • Protocol improvement
  • Security vulnerabilities

5
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 lt40mph
  • 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

6
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
7
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

8
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?

9
Year 1 Work Items
  • 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
  • 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

10
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)
11
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

12
Testbed Lab Network
Best effort traffic
192.168.90.254 Internet Gateway
Linux host 192.168.90.2
Wireless channel
100/1000 Switch
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 Mac000874c99933
Linux host 192.168.90.10 Mac000874c9971b
13
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

14
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

15
Testbed Trial Scenarios
  • Deployment 1 campus-wide/city coverage
  • Deployment 2 event coverage

16
Deployment 1 Area Coverage
  • Broadband wireless coverage of portions of campus

17
Deployment 2 Event Coverage
  • Broadband wireless coverage setup for football
    game day

18
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

19
Mobile WiMAX Testbed
20
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
21
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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