1 / 25

Introduction To Wireless World

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.

Olivia
Download Presentation

Introduction To Wireless World

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. 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 All Rights Reserved

  3. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  4. Topic: Introduction To Wireless World Wireless Market Jerry Gao Ph.D. 8/20000 All Rights Reserved

  5. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  6. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  7. Topic: Introduction To Wireless World Technology Trends Millions Source: Ericsson Radio Systems, Inc. Mobile Telephone Users Internet Users Jerry Gao Ph.D. 8/20000 All Rights Reserved

  8. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  9. Topic: Introduction To Wireless World E-Commerce Market Unit: Billion Dollars Source: Jupiter Research Jerry Gao Ph.D. 8/20000 All Rights Reserved

  10. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  11. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  12. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  13. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  14. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  15. 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. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  16. 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”. Jerry Gao Ph.D. 8/20000 All Rights Reserved

  17. 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 Jerry Gao Ph.D. 8/20002 All Rights Reserved

  18. 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) Jerry Gao Ph.D. 8/20000 All Rights Reserved

  19. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  20. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved Wireless Technologies

  21. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  22. 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 Jerry Gao Ph.D. 8/20000 All Rights Reserved

  23. 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? Jerry Gao Ph.D. 8/20000 All Rights Reserved

  24. 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? Jerry Gao Ph.D. 8/20000 All Rights Reserved

  25. 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? Jerry Gao Ph.D. 8/20000 All Rights Reserved

More Related