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1、9,Chapter,The Wireless Revolution,Identify the principal wireless transmission media and devices, cellular network standards and generations, and standards for mobile Web access Describe the major standards for wireless networks and for wireless Internet access Evaluate the role of m-commerce in bus
2、iness and describe the most important m-commerce applications,Management Information Systems Chapter 9 The Wireless Revolution,OBJECTIVES,Assess the business value of wireless technology and describe important wireless applications in business Identify and describe the challenges posed by wireless t
3、echnology and management solutions,OBJECTIVES (Continued),Management Information Systems Chapter 9 The Wireless Revolution,Challenge: provide Internet access and services to thousands of patrons in an historic one million square foot building Solution: Develop 802.11b (Wi-Fi) network with 70 access
4、points providing Internet access to patrons using wireless laptops and PDAs Extend wireless network to adjacent park and to library staff to enhance service levels Illustrates the importance of wireless networking to service customers at reasonable costs,Management Information Systems Chapter 9 The
5、Wireless Revolution,Boston Public Library Case,The Wireless Revolution,Mobile phones have become mobile platforms for delivering digital data, used for recording and downloading photos, video and music, Internet access, and transmitting payments. An array of technologies provides high-speed wireless
6、 access to the Internet for PCs and other wireless handheld devices and cell phones. Businesses increasingly use wireless to cut costs, increase flexibility, and create new products and services.,THE WIRELESS COMPUTING LANDSCAPE,Management Information Systems Chapter 9 The Wireless Revolution,Mobile
7、 Versus Fixed-line Subscribers Worldwide,Figure 9-1,THE WIRELESS COMPUTING LANDSCAPE,Management Information Systems Chapter 9 The Wireless Revolution,Source: International Telecommunications Union, 2002 and 2003, and authors.,Wireless communication helps businesses easily stay in touch with customer
8、s, suppliers, and employees. Wireless networking increases worker productivity and output, as workers take less time to establish contact with people and to access information.,THE WIRELESS COMPUTING LANDSCAPE,Business Value of Wireless Networking,Management Information Systems Chapter 9 The Wireles
9、s Revolution,THE WIRELESS COMPUTING LANDSCAPE,Companies can save on wiring offices, moving, and making network changes by using wireless networks. Wireless technology has also been the source of new products, services, and sales channels in a variety of industries, e.g. OnStar, Starbucks “hot spots”
10、.,Management Information Systems Chapter 9 The Wireless Revolution,Business Value of Wireless Networking (Continued),All wireless media rely on various parts of the electromagnetic spectrum.所有无线介质依靠电磁频谱的不同部分 Microwave systems transmit high-frequency radio signals through the atmosphere.微波系统通过大气传输的高频
11、无线电信号 Communication satellites are used for geographically dispersed organizations.通信卫星是用于地理上分散的组织,THE WIRELESS COMPUTING LANDSCAPE,Wireless Transmission Media and Devices,Management Information Systems Chapter 9 The Wireless Revolution,Frequency Ranges for Communications Media and Devices,THE WIREL
12、ESS COMPUTING LANDSCAPE,Figure 9-2,Management Information Systems Chapter 9 The Wireless Revolution,Amocos Satellite Transmission System,THE WIRELESS COMPUTING LANDSCAPE,Figure 9-3,Management Information Systems Chapter 9 The Wireless Revolution,THE WIRELESS COMPUTING LANDSCAPE,Devices for Wireless
13、Transmission:设备的无线传输,Paging systems寻呼系统 E-mail handhelds电子邮件的掌上电脑 Cellular telephones移动电话 Personal Digital Assistants (PDAs)个人数字助理 Smart phones智能手机,Management Information Systems Chapter 9 The Wireless Revolution,THE WIRELESS COMPUTING LANDSCAPE,Standards:,Global System for Mobile Communication (GSM
14、) 移动通信（ GSM全球系统 Code Division Multiple Access (CDMA) 码分多址（CDMA）,Cellular Network Standards蜂窝网络标准 and Generations,Management Information Systems Chapter 9 The Wireless Revolution,THE WIRELESS COMPUTING LANDSCAPE,Cellular Generations:,1G: Analog cellular networks for voice communication 2G: Digital wi
15、reless networks, primarily for voice communication; limited data transmission capability,Management Information Systems Chapter 9 The Wireless Revolution,THE WIRELESS COMPUTING LANDSCAPE,2.5G: Interim step toward 3G in the United States 3G: High-speed; mobile; supports video and other rich media; al
16、ways-on transmission for e-mail, Web browsing, instant messaging,Management Information Systems Chapter 9 The Wireless Revolution,Cellular Generations: (Continued),THE WIRELESS COMPUTING LANDSCAPE,Mobile Wireless Standards for Web Access,Wireless Application Protocol (WAP): Uses Wireless Markup Language (WML) and microbrowsers 无线应用协议（WAP ）：使用无线标记语言（WML ）和微浏览 I-mode: Uses compact HTML and allows for continuous connection我模式：使用紧凑的HTML ，并允许持续连接,Management Information Systems Chapter 9 The Wireless
