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Unformatted text preview: reless The Wireless Revolution • Radio frequency identification (RFID) • • Tags transmit radio signals over short distances to special RFID readers, which send data over network to computer for processing • Active RFID: Tags have batteries, data can be rewritten, range is hundreds of feet, more expensive • 6.41 Use tiny tags with embedded microchips containing data about an item and location Passive RFID: Range is shorter, also smaller, less expensive, powered by radio frequency energy Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless The Wireless Revolution • Radio frequency identification (RFID) • Common uses: • Automated toll-collection • Tracking goods in a supply chain • • 6.42 Requires companies to have special hardware and software Reduction in cost of tags making RFID viable for many firms Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless The Wireless Revolution How RFID Works RFID uses low-powered radio transmitters to read data stored in a tag at distances ranging from 1 inch to 100 feet. The reader captures the data from the tag and sends them over a network to a host computer for processing. 6.43 Figure 6-17 Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless The Wireless Revolution Interactive Session: Organizations Wal-Mart Grapples with RFID • Read the Interactive Session and then discuss the following questions: • How is RFID technology related to Wal-Mart’s business model? How does it benefit suppliers? • What people, organization and technology factors explain why Wal-Mart suppliers have had trouble implementing RFID systems? • What conditions would make adopting RFID more favorable for suppliers? • Should Wal-Mart require all its suppliers to use RFID? Why or why not? Explain your answer. 6.44 Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless The Wireless Revolution • Wireless sensor networks • Networks of hundreds or thousands of interconnected wireless devices embedded into physical environment to provide measurements of many points over large spaces • Used to monitor building security, detect hazardous substances in air, monitor environmental changes, traffic, or military activity • Devices have built-in processing, storage, and radio frequency sensors and antennas • Require low-power, long-lasting batteries and ability to endure in the field without maintenance 6.45 Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless The Wireless Revolution A Wireless Sensor Network Figure 6-18 The small circles represent lower-level nodes and the larger circles represent high-end nodes. Lower-level nodes forward data to each other or to higher-level nodes, which transmit data more rapidly and speed up network performance. 6.46...
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