Trends in Wireless Systems
This presentation is the property of its rightful owner.
Sponsored Links
1 / 40

Trends in Wireless Systems A subjective view of a rapidly evolving industry PowerPoint PPT Presentation


  • 68 Views
  • Uploaded on
  • Presentation posted in: General

Trends in Wireless Systems A subjective view of a rapidly evolving industry. Richard S. Wolff, Ph. D. [email protected] 406 994 7172 March 17, 2003. Outline. Some user trends The emergence of WiFi (802.11) The evolution of cellular: is there a 4G?

Download Presentation

Trends in Wireless Systems A subjective view of a rapidly evolving industry

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Trends in Wireless Systems

A subjective view of a

rapidly evolving industry

Richard S. Wolff, Ph. D.

[email protected]

406 994 7172

March 17, 2003


Outline

  • Some user trends

  • The emergence of WiFi (802.11)

  • The evolution of cellular: is there a 4G?

  • Some areas for research and innovation


Subscribers worldwide

Millions

Mobile phone

Wireline phone

TV households

PCs

Mobile devices will dominate

Source:

Risto Perttunen,

McKinsey, 9/00


Taiwan

Sw.

Italy

Fin.

Neth.

UK

Den.

Ger.

S. Kor.

Spain

Aus.

Fr.

Japan

USA

Malay.

Canada

Brazil

India


Strong growth in cellular subscribers (US data)

Subscribers Double 97- 00

Source: CTIA, 2000


DoCoMo annual revenue per user

(voice and i-mode)

(JY)

8740

8650

8480

Source: NTT DoCoMo Website, www.nttdocomo.com Investor Relations


1 billion wireless gadgets by 200x (Choose x = 4, 5, ...)

  • Gadgets and technology originally developed for one purpose will be used in new and innovative ways for other purposes

    • WiFi developed for enterprise wireless LANs but can be used as public infrastructure

  • Two parallel, contradictory (or complementary) gadget trends leading to different needs and capabilities

    • Integration:

      • cell phone as pager, organizer, e-wallet, radio, media player ...

    • Specialization:

      • different functionality, form factors, power requirements, connectivity, processing and storage, fashion niches


Example: integration

  • DoCoMo 3G FOMA phone

  • Download 684 kbps, Upload 64 kbps (nominal)

  • Still and video digital camera

    • Add text and frames to pictures or split into a jigsaw puzzle

    • Send as email

    • Share video while talking

  • Remote video monitoring using a second phone

  • i-motion service for multimedia content download (music, movie clips etc)

Source: NTT DoCoMo website


Example: hybrid

  • BlackBerry Wireless Handheld

  • Initially paging, now two-way e-mail

  • Initially text-based, now image and text

  • Cellular voice added

  • Targeted at business users

  • Integrates with office software

  • High level of security

Source: BlackBerry web site


Example: specialization

Designed to do one function very well


Multimedia

Relative Traffic

70 – 80 %

50 %

Voice

20 – 30 %

50 %

2000

2005

2010

Traffic characteristics


Bandwidth Available is Inversely Proportional to Range


Outline

  • Some user trends

  • The emergence of WiFi (802.11)

  • The evolution of cellular: is there a 4G?

  • Some areas for research and innovation


Wireless LANs – Technologies

[1] Frequency Hopping Spread Spectrum

[2] Direct Sequence Spread Spectrum

[3] Orthogonal Frequency Division Multiplexing


Wireless LANs: complement or compete with cellular?

Source: Pyramid research


New Intel chip set:Will this get the ball rolling?


W-LAN Deployment – work in progress

  • Security – older 802.11 standard (WEP) being replaced

    • 802.1x for authentication/password

    • Alternative is access point controller (e.g. Bluesocket or Vernier)

  • Visitor Based Networks (VBNs) or Hot-Spots

    • Boutique ISPs emerging now: Boingo, Joltage, Wayport, EtherLinx, WiFi Metro

    • Larger ISPs waiting for wireless WAN solution to emerge

  • Provisioning and management of W-LANs

    • Enterprise and residential provisioning of subscribers

    • Configuration of security and QoS


Coffee Shop/Hotel/Public Space, etc

Typical Hotspots

  • Architecture commonly deployed in Coffee shops and airports:

Installation (Per Site)

Hardware:$4000

Installation:$500

On-going

Internet Access:$150/month

Access Point(s) are “dumb” & AAA Server Located at Every Site


WiFi and Fries…..

March 11,2003


Convergence?Use of WiFi for fixed Internet access


A peculiar marriage:Cable operator using WiFi for fixed access

March 11,2003


Service Provider’s

Network

Integration of voice and data on WiFi

Note PC

User Premises

Wireless

Access Point

LAN

Voice&Data

PDA

Mobile

Communication

Server and system

  • Features

    • Voice & Data Integration by IP

    • Realtime Mobility

      • Seamless handoff, Voice support

    • Wireless Security

      • AAA and encryption for the access network

    • QoS

      • Admission control, L2 QoS management

Cellular

Handset


The Convergence of Wi-Fi and Cellular…

NY Times, July 15, 2002

  • Talks Weigh Big Project on Wireless Internet Link

  • By JOHN MARKOFF

  • SAN FRANCISCO, July 15 — Several leading computer and telecommunications companies

  • are discussing the joint creation of a wireless data network that would make it possible for users

  • of hand-held and portable computers to have access to the Internet at high speeds nationwide.

  • The Intel Corporation, I.B.M., AT&T Wireless and several other wireless and Internet service

  • providers including Verizon Communications and Cingular are exploring the creation of a

  • company to deploy a network based on the increasingly popular 802.11 wireless data standard,

  • known as WiFi, according to several people close to the talks…….


  • Seamless Mobility/Transparent operations: Cellular to WiFi

    ITSUMO testbed

    Telcordia/Toshiba research project


    Fixed Network

    WiFi Network

    The car as the next internet appliance

    Content

    • Seamless mobility

    • Fast handoffs

    • Content adapts to available bandwidth

    IGW

    IGW

    IGW

    IGW

    IGW

    Hot Spot

    ...

    Cellular Network

    Current solutions are limited in scope and functionality


    Summary– Wireless LAN applications

    • W-LAN solutions converging on WiFi (802.11b -> 802.11a)

      • Enterprise & residential WiFi LAN network opportunity exists today

      • Hot-Spot & Visitor Based Nets (VBNs) coming?

      • W-LAN obstacles to mitigate: QoS, mobility, scaling,security

      • Interworking with cellular- coming soon


    Outline

    • Some user trends

    • The emergence of WiFi (802.11)

    • The evolution of cellular: is there a 4G?

    • Some areas for research and innovation


    Speed bps

    BT = Bluetooth

    H2 = Hiperlan 2

    PDC = Personal Digital Cellular

    100 M

    H2

    802.11

    PBCC

    10 M

    802.11b

    5.5/11 Mb

    802.11

    BT

    WCDMA

    1 M

    EDGE

    cdmaOne

    1X EV-DC, 3X

    GPRS

    100 K

    PDC

    cdma2000

    1X

    10 K

    GSM

    TDMA

    AMPS

    cdmaOne

    2G

    1G

    2.5G

    3G

    4G

    3.5G

    1990

    2010

    2000

    1985

    Cellular networks- is there a 4G coming?The bandwidth perspective

    ??

    ?


    Wireless generations: User’s view


    This is just the beginning!

    Source:

    Rainer Malaka, EML

    ICDE 2001


    4G Imperatives(1 of 3)

    • Innovative applications, not voice, will be the key revenue generator

      • Programmability and open interfaces

        while maintaining security, QoS, and bill-ability

      • Foster a 3rd-party app developer community

        Build on work centered on fixed networks

      • The search for the killer app should never end

        Any static portfolio of applications and services will eventually become a commodity

      • Radical personalization and niche applications

        Applications with a market size of 1


    4G Imperatives(2 of 3)

    • True convergence with the Internet is critical

      • IP must be supported efficiently

      • Remove discontinuities at the wired/wireless interface and the data/voice interface

      • The Internet must also evolve to support wireless mobility and ubiquity efficiently

        Example: Fundamental addressing issues dictate IPv6

        Example: Fundamental inefficiencies in supporting mobility must be removed


    4G Imperatives(3 of 3)

    • Spectrum will remain the vital resource

      • Integrate with unlicensed spectrum

        • Allow creative technology and business models for seamless inclusion of hotspots and multi-hop WLAN and other technologies

      • Manage licensed spectrum efficiently

        • Consider dynamic and market-based mechanisms for on-demand spectrum allocation


    4G: The Basic Model

    3rd-party

    Applications

    Native

    Applications

    Voice

    OPEN INTERFACE

    Middleware

    OPEN INTERFACE

    IP-Based Core Network

    OPEN INTERFACE

    PAN, CAN, AAN etc.

    Native

    WLAN

    Hotspot

    3rd-party

    WLAN

    Hotspot

    3G / Native Access

    3G / 3rd-party Access

    4G Access Network

    Emerging

    Access


    Evolution towards 4G

    • 3.5G: An All-IP network (i.e., with Wireless IP) integrating all our current favorite IETF protocols (MIP, FMIP, HMIP, CARD, PANA, etc )

    • 4G: A programmable, flexible, application-oriented Web-based architecture suitable for fundamentally supporting

      • mobility

      • WWW

      • ubiquitous computing

      • semantics-aware applications


    Outline

    • Some user trends

    • The emergence of WiFi (802.11)

    • The evolution of cellular: is there a 4G?

    • Some areas for research and innovation


    What are some of the missing pieces – areas for research and innovation (1 of 3)

    • Spectrum use

      • Ultra-wideband

      • Dynamic spectrum reuse

      • What about free space optical?

    • Software defined radios

      • Flexible modulation and coding

      • Software downloads of middleware and applications

    • Array antennas

      • Dynamic beam formation

      • Interference rejection

      • Further exploit signal processing and active feed back and control


    What are some of the missing pieces – areas for research and innovation (2 of 3)

    • Ad hoc networks

      • Use the clients as fixed network infrastructure

      • Use alternate routing to mitigate congestion, dead spots

      • What about the third dimension: incorporate satellites

      • Dynamic binding: car-to-car, car-to-roadside

    • Applications designed for wireless: exploit programmable host platforms (BREW, J2ME, Pocket PC, etc.)

      • Location awareness – exploit it

      • Advances in user interfaces – accommodate for mobile use, hands free operation

      • Mobile code (agents) for mobile users


    What are some of the missing pieces – areas for research and innovation (3 of 3)

    • Economic models

      • Innovative business models Cost/benefit analyses

      • Life cycle cost studies

      • Impacts of technology trends

      • Assessments of policy and regulatory changes

      • Regional deployment scenarios


    Summary

    • Wireless systems should be defined in terms of applications and services

      • Not purely by air interface protocol

      • Coming: Gazillions of wireless gadgets

      • Need for massive mobile data management

    • Rapid service introduction and heterogeneous technologies (air interface, terminal device, backbone)

      => programmability and open interface at all levels of the system

      => applications with market size of 1

      A very fertile area for research and innovation


  • Login