Wireless Communication Fixed services: Bluetooth WiFi WIMAX RFID Mobile services: Limited Mobility (Flexi) Cellular (GSM, CDMA, 3G) Type of Wireless Technology Degree of mobility Standing Walking Driving User data rate 10 Mbps IEEE 802.16a,d 1 100 HSDPA IEEE 802.16e WLAN (IEEE 802.11x) GSM GPR...
通信工程专业导论(Introductiontocommunicationengineering)PptdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ord..
《计算机专业英语》 课件 Unit 01 Introduction to Computers.ppt,2. Simulated Writing: Uncovering the Secrets of Clear Writing (I) Clear Writing 简要介绍 好的作者不是天生的。他们通过不断地练习和对细节的关注来培养自己的技能。我们也可以通过同样的方式来成为
文档标题《Introduction to Data Communications[引入到数据通信]》,总页数为145页,主要介绍了与Introduction to Data Communications[引入到数据通信]相关的资料,希望对大家有用,欢迎大家浏览! 文档格式: .ppt 文档大小: 654.5K 文档页数: 145页 顶/踩数: ...
chapter1 Introduction to e-business课件.ppt,Contents 1.e-Business vs e-Commerce 2.What makes e-Business different from business? 3.The rise and fall of the economy 4.Characters of e-business 5.Types of e-business 6.Evolution of e-business 7. benefits for
Examples of channels: copper wires, optical fibbers or wireless communication channels. Data Communication Channels The following is a discussion on the THREE main types of transmission circuits (channels), simplex, half duplex and full duplex. Simplex Data in a simplex channel is always one way. ...
IEEE 802.11 in OSI Model Wireless 802.11 – Architecture of an ad-hoc network Direct communication within a limited range – Station (STA): terminal with access mechanisms to the wireless medium – [Independent] Basic Service Set group of stations using the same radio frequency • You may use...
security 1.7 History Computer network-Introduction */88 A closer look at network structure: network edge: applications and hosts access networks, physical media: wired, wireless communication links network core: interconnected routers network of networks Computer network-Introduction */88 The network edge...
Used for automatic device or service detection. Examples include Dynamic Host Configuration Protocol (DHCP) for IP address allocation services, and Domain Name System (DNS) for name-to-IP address translation. protocol suite a group of inter-related protocols necessary to perform a communication functi...
What is Mobile Communication ? Entails transmission of data to and from handheld devices Two or more communicating devices At least one is handheld or mobile Location of the device can vary either locally or globally Communication takes place through a wireless, distributed, or diversified network ...