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Introduction To Wireless World. Speaker: Jerry Gao Ph.D. San Jose State University email: jerrygao@email.sjsu.edu URL: http://www.engr.sjsu.edu/gaojerry. Topic: Introduction To Wireless World. Presentation Outline.

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introduction to wireless world
Introduction To Wireless World

Speaker: Jerry Gao Ph.D.San Jose State Universityemail: jerrygao@email.sjsu.eduURL: http://www.engr.sjsu.edu/gaojerry

topic introduction to wireless world
Topic: Introduction To Wireless World

Presentation Outline

  • Needs and Trends - Wireless Market- Technology Trends- History of Wireless Data and Network- Major Benefits and Advantages- Wireless Spectrum- Wireless Frequency Bands- Wireless Technologies- Issues and Challenges

Jerry Gao Ph.D. 8/20000

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slide3

Topic: Introduction To Wireless World

Demand of Wireless Internet Access

Source: http://www.eurotechnology.com/imode/faq-wap.html

Figure 1: The World’s Wireless Internet Users

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wireless market

Topic: Introduction To Wireless World

Wireless Market

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needs of mobile access

Topic: Introduction To Wireless World

Needs of Mobile Access
  • The Yankee Group projects that by 2004 more than 40% of wireless users in the United States will have direct Internet access from their mobile devices
  • Robinson Humphrey (an investment group) predicts that by 2004 in the United States, 50% of internet hits will originate from wireless devices.
  • According to eTForecasts1 and Global Mobile2, in the year of 2000, there are 468 million mobile users. This number is much higher than the number, 365 million, of Internet users in 2000.
  • The Kelsey Group estimated that the U.S. wireless advertising market would be $35 million in 20003.
  • Jupiter Media Metrix predicted that the market would be 600 million by 20034.

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what are the diving force in the wireless world

Topic: Introduction To Wireless World

What are the diving force in the wireless world?
  • Technology drivers:
    • Emergence of standards
    • Network ubiquity and interconnection
    • Emergence of affordable and powerful terminal devices
  • Business drivers:
    • Explosive growth of the Internet
    • Opportunity for new revenue models
    • Need to differentiate services and improve customer retention
    • Need to expand reach to new customers
  • Usage drivers:
    • Mobility needs among business professionals, such as access to intranet information while at a customer site.
    • Need for people to be in touch with friends and family all the time; need for people to access information as part of an “on-the-go” life style

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technology trends

Topic: Introduction To Wireless World

Technology Trends

Millions

Source: Ericsson Radio Systems, Inc.

Mobile Telephone Users

Internet Users

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technology trends8

Topic: Introduction To Wireless World

Technology Trends

% of main lines

that are mobile

phones

By Year 2002:

  • One in three telephones will be mobile
  • Mobility becomes a lifestyle

Source: Economist, 4 May 2000

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e commerce market

Topic: Introduction To Wireless World

E-Commerce Market

Unit: Billion Dollars

Source: Jupiter Research

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the mobile internet value chain

Topic: Introduction To Wireless World

The Mobile Internet Value Chain

User

Device Manufacturer

Mobile Internet Access Provider

(Network Provider)

Infrastructure Vendor

Content Aggregator (Portal)

Application Service Provider

Content Provider

Content Creator

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history of today s wireless data

Topic: Introduction To Wireless World

History of Today’s Wireless Data
  • By the early 1940s, several thousand police cars equipped with two-way mobile radios had established the important of wireless communications Using Point-to-Point Communication from a central location.
  • In 1946, the first public mobile telephone systems were introduced in 25 U.S. cities, providing businesses and individuals with the ability to make calls to destinations 30 miles or more away, while the users were in transit.
    • Limited coverage and reassigned channels
    • Limited number of subscribers
    • No connection to the public telephone system

The early mobile networks expanded slowly due to the major issues:

- frequency limitations and technological shortcomings.

  • During 1950s and 1960s, telephone companies around the world worked to address these limitations by developing the theories behind cellular radio technology.

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history of today s wireless data12

Topic: Introduction To Wireless World

History of Today’s Wireless Data
  • The Cellular Systems:
    • In the late 1960s, when ATAT proposed a cellular telephone network to the Federal Communications Commission (FCC), the principles of cellular communication were known, but the technology to implement them would not be available until more than a decade later.
    • In 1979, the Japanese firm Nippon Telegraph and Telephone Company deployed the first cellular system. It was followed in 1981 by the deployment of a cellular system that covered much of Europe.
    • In 1983, the FCC finally allocated enough radio spectrum to support the first domestic cellular telephone network. It is called the Advanced Mobile Phone System (AMPS), remains in place today, providing what is typically called analog cellular service by wireless providers.

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history of today s wireless data13

Topic: Introduction To Wireless World

History of Today’s Wireless Data
  • Industry Partnerships:

The past 20 y ears have brought a series of revolutionary movements in both

Wireless telephony and wireless data.

    • In 1980, IBM and Motorola joined forces to form ARDIS, a separate entity responsible for providing wireless data to mobile workers, such as field service technicians. The ARDIS network was rapidly adopted by outside clients such as Otis Elevator. This network is still operating today.
    • In 1986, Ericsson developed Mobitex, the foundation of the RAM Mobile Data network. The network initially was set up in Europe and U.S. to provide wireless data to vertical markets. BellSouth acquired RAM Mobile Data limited in June 1998, and deployed 13 networks worldwide.
    • More recently, Cingular Wireless took control of domestic Mobitex network which provides the backbone for the first generation Palm.Net service, used by the successful Palm m705 – and Paml VIIx – connected organizers.

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history of today s wireless data14

Topic: Introduction To Wireless World

History of Today’s Wireless Data
  • Recent Advances:
    • In the early 1990s, advancements in cellular voice technology allowed the use of existing cellular networks for data transmission by employing Cellular Digital Package Data (CDPD). CDPD works with existing first – and second – generation AMPS cellular systems ->
      • Simple and easy installation
      • Cheap to upgrade
      • Larger coverage and more capacity
    • More recently, the advent of digital cellular networks, including Global Service for Mobile (GSM) in Europe and North America along with the various Personal Communication Services (PCS) networks in U.S. has provided an even broader range of services for wireless data.
    • By 2005, there will be as many wireless subscribers as there are wired service subscribers.

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benefits and advantages

Topic: Introduction To Wireless World

Benefits and Advantages
  • Provide people with a new life style with mobility
    • Mobility to search and receive real-time dynamic information from the wireless network anywhere, anytime, and location.
    • Mobility to conduct business workflow, trading transactions, and events.
    • Mobility to connect to services for customers.
    • Mobility to learn, work, play, and communicate with each other.
  • For network vendors and organizations:
    • A complex, costly, and degradation-prone wiring infrastructure is no longer needed.
    • Ease of installation -

With no wires to configure users can be added very quickly without the traditional waiting period associated with a wired network.

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slide16

Topic: Introduction To Wireless World

Wireless Benefits and Advantages

  • For businesses:
    • Provide an end-to-end, flexible, mobile and personal channel to interact with customers.
    • Support all types of end-to-end application services to their customers in anytime, anywhere, and any device.
    • Provide new wireless solutions enable users to access information whenever and however they want.
    • Improve e-CRM (customer relationship management) in a mobile way – that is “any device, anytime, anywhere”.

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needed technologies and solutions

Topic: Introduction To Wireless World

Needed Technologies and Solutions
  • Bluetooth Networks and Technology
  • Wireless LAN
  • Cellular Network Systems
  • Mobile Data Network Systems
  • WAP (Wireless Application Protocol)-based Network
  • Wireless Web or Wireless Internet (such as iMode)
  • Technologies for mobile terminal device
    • Web phones, Handhelds, Pagers, PDAs, Pocket PCs.
  • Solutions and technologies for M-commerce

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slide18

Topic: Introduction To Wireless World

What Wireless? What Spectrum?

  • Frequencies For Exclusive Purchase
    • 2.4 GHz Industrial/Scientific/Medical(ISM)
      • not sold but reserved for free use
    • 2.5 GHz Multichannel Multipoint Distribution Services(MMDS)
    • 5.7 GHz (U-NII) - not sold but reserved for free use
    • 28 GHz Local Multipoint Distribution Services(LMDS)
  • Frequencies Segregated into Bands
    • 200 MHz at 2.5 GHz (MMDS)
    • 100 MHz at 5.7 GHz (U-NII)
    • 1.3 GHz at 28 GHz (LMDS)

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slide19

902-928 MHz

26 MHz

2.4 – 2.4835 GHz

83.5 MHz

(IEEE 802.11)

5 GHz

(IEEE 802.11)

HyperLAN

HyperLAN2

Topic: Introduction To Wireless World

Wireless Frequency Bands

Short Wave Radio

FM Broadcast

Infrared wireless LAN

AM Broadcast

Television

Audio

Cellular (840MHz)

NPCS (1.9GHz)

Extremely

Low

Very

Low

Low

Medium

High

Very

High

Ultra

High

Super

High

Infrared

Visible

Light

Ultra-

violet

X-Rays

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slide20

Cellular GPS

INTERNET

Fixed Wireless

Wireless LAN

  • PDAs, Cell Phones
  • CORE Networks
  • “Last Mile” Access
  • IEEE 802.11/b
  • DATA/Voice integration
  • ISP providers
  • Central Office Cellular
  • 28GHz –LMDS vs. 5.7GHz U-NII
  • 5 miles @ 45 Mbps P2MP
  • 5 miles @ 155 Mbps P2P LMDS
  • 2.4 GHz DSSS vs. FHSS
  • “Wireless Anywhere”
  • 840Mhz @ 15Kbps to 36Kbps
  • 200m@10Mbps
  • FCC certified

Core

Web Servers

ISPs

Cellular

Operator

CO

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Wireless Technologies

slide21

Topic: Introduction To Wireless World

Challenges in Wireless Implementation

  • On the equipment side
    • Less powerful CPUs
    • Less memory (ROM and RAM)
    • Restricted power consumption
    • Smaller displays
    • Different input devices (e.g., a phone keypad, voice input, etc.)
  • On the network side
    • Less bandwidth
    • More latency
    • Less connection stability
    • Less predictable availability

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slide22

Topic: Introduction To Wireless World

Engineering Wireless-Based Software Systems

Common Features of Wireless-Based Software Systems:

  • Wireless accessibility
  • Profile-based services
  • Location-based applications
  • Inter-operation ability
  • Platform independence
  • Scalable and efficient performance
  • Reliable transactions and processing

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slide23

Topic: Introduction To Wireless World

Engineering Wireless-Based Software Systems

System Analysis of Wireless-Based Software Systems:

  • How to analyze and specify the functions and infrastructure of wireless-based software systems?
  • How to analyze and understand the required wireless networking infrastructures and air-interfaces and protocols based on customer requirements?
  • How to analyze and understand mobile customers’ needs a given domain application? (including security, functions, …and so on)
  • How to analyze, understand, and specify the interoperations between mobile users and wireless-based systems?
  • How to analyze and understand the interactions between mobile client software and wireless-based/wireless Internet-based software?
  • How to analyze, understand, and specify the state behaviors of mobile client software?

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slide24

Topic: Introduction To Wireless World

Engineering Wireless-Based Software Systems

Design of Wireless-Based Software Systems

  • What are the major design challenges and issues?
  • How to select or develop wireless network infrastructures, protocols, and frameworks as well as components?
  • How to select and define an appropriate system infrastructure and architecture?
  • How to support diverse mobile client devices?
  • How to achieve good performance, scalability, portability, interoperation ability?
  • How to design efficient and effective mobile client software?
  • How to select mobile technologies, security solutions, mobile platforms?

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slide25

Topic: Introduction To Wireless World

Engineering Wireless-Based Software Systems

  • Testing and Quality Assurance of Wireless-Based Software Systems
    • What are the issues in testing of wireless-based software systems?
    • What are the major quality assurance challenges and issues in wireless-based software systems in a cost-effective and systematic way?
    • How to test system mobility, performance, scalability, and throughput of wireless-based software systems?
    • Where are the testing tools for wireless-based application systems?
    • What are the deployment issues of wireless-based software systems?

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