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Wireless Past, Present and Future.

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Wireless Past, Present and Future. University of Auckland Robert Beattie – PowerPoint PPT presentation

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Title: Wireless Past, Present and Future.


1
Wireless Past, Present and Future.
  • University of Auckland
  • Robert Beattie

2
Campus Environment
  • We are a small town in the Auckland area.
  • 4,000 plus staff.
  • 30,000 plus students.
  • 4 main campus sites
  • 300 plus building and structures.

3
Infrastructure
  • Telecommunications
  • HVAC
  • Water
  • Sewage
  • Power

4
Telecommunications
  • The University of Auckland has a history of
    investment in infrastructure technology.
  • VM (virtual machines)
  • EVF (virtual firewalls)
  • Metro Area Networks.(10Gb)
  • Wired Networks.
  • Wireless Networks.

5
Wireless is not new
  • Telemetry.
  • Point to Point links.
  • Wireless access points.
  • Special projects.

6
Why is Wireless so popular?
  • Freedom
  • New way to deliver information
  • Students
  • Faculties
  • New devices are wireless capable.
  • Potential cost savings

7
Over the past few years
  • Explosion in Wireless equipment.
  • Seen as new by the general public
  • User awareness of wireless.
  • AD HOC installations.
  • No Security.
  • Chaos

8
Bringing order to chaos
  • Working group
  • Technology choice
  • We chose thick AP
  • Web site
  • User, client documentation
  • Standards and Security

9
Where we installed Wireless
  • Common areas
  • Library
  • Lecture theatres
  • Meeting rooms
  • Office areas

10
Lessons learned from the project
  • Client set up is not user friendly.
  • Issues with end user devices.
  • Network Access Points (AP) are easy to steal.
  • Communication with the community is vital.
  • Wireless is largely about where we put the Access
    Points and how we physically secure them.

11
Lessons learned from the project
  • Limited channel capacity.
  • Bandwidth will be a challenge.
  • Manual site survey and deployment are labour
    intensive.
  • Need to cost effectively increase AP density and
    find a way to load balance traffic.

12
User feedback
  • General satisfaction with the system
  • They want more
  • No issues with throughput
  • Too expensive
  • Connecting to network could be improved.
  • Easy access for guests needed.
  • Some lectures believe it is disruptive
    technology.

13
Users want some changes
  • Implement a guest system.
  • More throughput
  • More coverage
  • Make it all free
  • Ease of use for authentication and encryption
  • Self service model

14
When planning to deploy Wireless ensure that you
know
  • How much bandwidth is available.
  • How secure is wireless
  • Who are the users
  • What equipment is needed
  • How you will manage the Wireless System

15
Radio Spectrum
  • Radio Spectrum is a limited resource.

ISM Band 2.4Ghz
UNNI Band 5.8Ghz
Microwave band
16
Current Wireless Standards
  • 802.11b (2.4Ghz).
  • Highly prevalent (Most laptops used to ship with
    a b card)
  • Many devices operate in this spectrum
  • Approximately 6-7 Mbps throughput.
  • 802.11g (2.4Ghz).
  • Highly prevalent (Most Laptops now ship with a G
    card)
  • Many devices operate in this spectrum
  • Approximately 22-27 Mbps throughput, but default
    to b if a legacy 802.11b client associates.

17
Emerging Wireless Standards
  • 802.11a (5.8Ghz).
  • Less prevalent (A cards usually have to be
    selected)
  • Less crowded air space, higher number of clear
    channels
  • Approximately 22-27 Mbps throughput.
  • 802.11n
  • Not a ratified standard. Proprietary solutions
    predominate
  • Promises longer range, and higher data rates (480
    Mbps of throughput) Not always a reality
  • 802.16 WiMAX
  • Very new technology
  • Designed for last mile access.
  • Has no support for Roaming at this point. In
    draft form.

18
How secure is Wireless
  • Security
  • Rotating 128bit WEP keys with TKIP and LEAP/EAP.
  • Wireless network has its own VLAN
  • Authentication
  • 802.1x for authorisation.
  • LDAP for access to Net Account

19
Securing your Wireless
  • What is your goal with security?
  • Keep non-university users off the network
  • Prevent users from seeing each others traffic
  • Prevent users connecting to each other over
    wireless.
  • Access control on a user basis
  • Keep viruses off the network
  • The answers to those questions determine what
    type of security you should implement
  • The more security you implement, the more steps
    you require your users to follow, the less user
    friendly more it becomes

20
Who are the users
  • Students
  • Staff
  • Guests

21
Traffic Planning
Low traffic Many users
Coverage based
Heavy traffic Few users
Traffic Based
22
Wireless Architectures
Thick APs Each AP is a complete autonomous unit.
It operates and is managed individually
Present
Thin APs Each AP connects Physically or
logically to a central controller. The
controller manages the APs as a complete group.
Under development
Blanket coverage Using large gain APs or
Multi-radios APs to cover spaces
Future
23
An example
  • Average throughput of a 802.11g AP is 22-27Mbps.
  • Average Class size is 30 Students
  • Assuming every student is downloading a file at
    the same time, it works out to about /-1Mbps per
    student.
  • So you would deploy 1 AP for this classroom.

24
Site Survey
  • Site Surveys are essential for any well planned
    deployment.
  • Software can be purchased that will perform a
    theoretical survey. However, software does not
    provide all the answers.
  • Time spent in undertaking a physical survey is
    time you dont have to spend diagnosing problems.
  • Get it right the first time

25
Installation
  • Wireless AP are attractive items
  • Discrete installs
  • External aerials
  • Aesthetics
  • Accessibility

26
Centralised Technical Management
  • For successful wireless systems you must.
  • Centrally manage the technology platform
  • Security
  • Coverage
  • Forward provisioning
  • Manage the air space
  • Proactively management of the network

27
Decentralised Service Management
  • For successful wireless systems you must enable
    the user to manage the service layer.
  • Self service
  • Enable the faculties
  • Enable conference organisers
  • Visiting guests
  • Meeting rooms
  • Contractors

28
Wireless Vision
  • Provide wireless access with simple plug play
    capabilities that require no laptop or device
    re-configuration and no IT skills or resources to
    establish the connection.
  • Its got to be easy to use

29
Wireless Architecture
Thanks to Cisco Systems
DMZ
Central controller
Enterprise Network
Wired Guest
Wireless Guest
Wired Employee
Wireless Employee
30
Guest client connection process
Thanks to Cisco Systems
1. Guest starts web browser
2. Controller redirects to self service portal
screen
Self Service Just click on the services you want
3. User enters choice and authentication
information
Wired or Wireless Network
Central controller
4. controller authorizes the user, establishes
connection, and accounts for usage
5. End user free to browse the Internet, E-mail,
VPN, etc.
31
Eduroam
  • International Education inter-institutional
    roaming.
  • A guest access mechanism.
  • Allows visitors to use their own credentials to
    access agreed services from your network.
  • In the process of being configured.

32
Challenges
  • Predictable wireless performance.
  • Cost effective deployment model
  • Robust multilayered security
  • Technology churn.
  • Can the existing investment grow to meet future
    service demands?

33
Future trends
  • New technology will replace or supplement current
    802.11 types.
  • There will be many more highly portable device
    types on the campus, possibly in the thousands
  • Some areas will be totally wireless.
  • There will be wireless telephones in use.
  • Roaming will be important.
  • The PABX, WLAN and Mobile Networks will converge.

34
The end
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