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Chapter 8 Notes

by: Dalia Szkolnik

Chapter 8 Notes BTE 210

Dalia Szkolnik
GPA 3.8

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About this Document

These notes include information about wireless, mobile computing, and mobile commerce.
Fundamentals of Business Technology & Innovation
Geraldine Perez
Class Notes
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This 4 page Class Notes was uploaded by Dalia Szkolnik on Monday February 22, 2016. The Class Notes belongs to BTE 210 at University of Miami taught by Geraldine Perez in Winter 2016. Since its upload, it has received 51 views. For similar materials see Fundamentals of Business Technology & Innovation in Information System at University of Miami.


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Date Created: 02/22/16
Chapter 8 Wireless, Mobile Computing and Mobile Commerce 8.1 Wireless Technologies Not all wireless networks are mobile Wireless devices • Advantages for users o Small enough to carry around or to wear o Computing power to perform tasks (battery life) o Communicate wirelessly to Internet or other devices • Disadvantage for business o Workers can capture and transmit sensitive proprietary information Wireless transmission media (WTM) • Wireless media (broadcast media) o Transmit signals without wires • 4 major types below Channel Advantages Disadvantages Microwave High bandwidth, relatively Open to environmental inexpensive interference, must have unobstructed line of sight Satellite High bandwidth, large Expensive, has to have coverage area unobstructed line of sight, signals experience propagation delay (long duration) Radio High bandwidth, signal pass Creates electrical through walls, inexpensive, interference problems, easy to install susceptible to snooping unless encrypted Infrared Low to medium bandwidth, Must have unobstructed line used only for short of sight distances Types of Telecommunication Satellites • GEO  stationary elative to point on earth, few needed for global coverage, most expensive, longest orbital life • MEO  move relative to point on earth (GPS systems), moderate number needed for global coverage, less expensive, moderate orbital life • LEO  move rapidly relative to point on earth, large number needed for global coverage, least expensive, shortest orbital life Internet over Satellite • Advantages  provides internet services to remote areas on Earth • Disadvantages  broadcast delay, disrupted by environmental conditions (ex: Hurricanes damage satellite poles) Global Positioning System (GPS) • A wireless system that utilizes satellite to enable users to determine their position anywhere on Earth • Supported by 24 MEO Satellites • Use of GPS o Navigating, mapping, surveying, 911 location 8.2 Wireless Computer Networks and Internet Access Short-range wireless networks • Range of 100 feet or less • Bluetooth  link up to eight devices within a 30-foot area, used in PANs, transmit up to 2.1 mbps • Ultra-wideband  high bandwidth wireless technology with transmission speeds in excess of 100 mbps, faster streaming data and imaging, shortest range of any wireless network o Example: Healthcare  remote monitoring of home patients • Near-field communications  shortest range of any wireless network, embedded in mobile devices such as cell phones and credit cards Medium-range wireless networks • Wireless fidelity (Wi-Fi) o Wireless local area networks (WLAN) o Wi-Fi direct: support peer-to-peer communications similar to Bluetooth o MiFi: small, portable wireless device that provides users with a permanent Wi-Fi hotspot wherever they go o Super Wi-Fi: wireless network proposal that creates long-distance wireless Internet connections • Wireless Mesh Networks o Use multiple Wi-Fi access points to create a wide area network o Example: University of Miami has a mesh of wireless networks (it has many routers under Secure Canes network) • Wide-Area Wireless Networks o Connect users to each other and to the Internet over geographically dispersed distances  Cellular radio (cellular telephones)  two-way radio communications over a cellular network of base stations with seamless handoffs  Wireless broadband  Worldwide Interoperability for Microwave Access (WiMax), provides wireless access range of up to 31 miles 8.3 Mobile Computing and Mobile Commerce • Mobile Computing  refers to a real-time connection between a mobile device and other computing environments, such as the Internet or Intranet • Mobile Commerce  electronic commerce (EC) transactions conducted in a wireless environment, especially via the Internet Mobile Computing • Mobility  users can initiate a real-time contact with other systems from anywhere using a mobile device • Broad reach  users with a mobile device can be reached instantly o Mobility and Broad Reach create 5 value-added attributes  Ubiquity  connect anywhere regardless of user’s location  Convenient and Instant Connectivity  easy and fast to access the web, intranets, and other mobile devices  Personalization  information can be customized and send to individual consumers  Localization of products and services  knowing a user’s location helps companies advertise their products and services Mobile Commerce • Factors that enable m-commerce o Widespread availability of mobile devices o Declining prices of wireless devices o Bandwidth improvement • Location-based applications and services (L-Commerce  Location based commerce) o Location-based advertising  sending user-specific advertising messages concerning nearby shops, malls, and restaurant’s to consumers’ wireless devices (Example: NAVTEQ) o Location-based services  provide information that is specific to a given location (Example: CM-map) • Financial services o Mobile banking  access to financial and account information o Wireless payments  make payments for products and services o Micropayments  electronic payments for small purchase amounts (generally less than $10) o Wireless wallets  make purchases with single click from mobile device o Bill payments services  allows users to pay bills directly from their cell phones • Accessing information o Mobile portal  aggregates and provides content and services for mobile users (Example: Yahoo! Mobile) o Voice portal  web site with an audio interface that can also be accessed through a standard phone or cell phone (Example: iPing) • Telemetry o Wireless transmission and receipt of data gathered from remote sensors (Example: Find my iPhone) 8.4 The Internet of Things (IoT) Internet of Things in Use • Healthcare, Supply Chain Management, Automotive, Transportation, Agriculture Radio Frequency Identification • Use tags with microchips containing data and antenna to transmit radio signals over a short distance to RFID reader Wireless Sensor Networks • Networks of interconnected, batter-powered, wireless sensors that are placed into the physical environment • Each sensor activates shortly to transmit data to the nearest neighbor sensor until reaching central computer for processing 8.5 Wireless Security Four Major Threats • Rouge access points  an unauthorized access point connected to a wireless network o Evil twin attack: user connects to a malicious access point where attacker could intercept confidential information • War driving  locating WLANs while driving around a city or elsewhere • Eavesdropping  efforts by unauthorized users to try to access data traveling over wireless networks • Radio-frequency jamming  a person or a device intentionally or unintentionally interferes with your wireless network transmissions


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