计算机网络 自顶向下方法 第六章(英文版)

Chapter 6Wireless and Mobile Networks;Chapter 6: Wireless and Mobile Networks;Chapter 6 outline;Elements of a wireless network;Elements of a wireless network;Elements of a wireless network;Characteristics of selected wireless link standards;Elements of a wireless network;Elements of a wireless network;Wireless Link Characteristics;Wireless network characteristics;Code Division Multiple Access (CDMA);CDMA Encode/Decode;CDMA: two-sender interference;Chapter 6 outline;IEEE 802.11 Wireless LAN;802.11 LAN architecture;802.11: Channels, association;IEEE 802.11: multiple access;IEEE 802.11 MAC Protocol: CSMA/CA;Avoiding collisions (more);Collision Avoidance: RTS-CTS exchange;framecontrol;Internet;framecontrol;;;Chapter 6 outline;;Cellular networks: the first hop;Cellular standards: brief survey;Cellular standards: brief survey;Cellular standards: brief survey;Chapter 6 outline;What is mobility?;;;How do you contact a mobile friend:;Mobility: approaches;Mobility: approaches;;;Indirect Routing: comments;Indirect Routing: moving between networks;;Mobility via Direct Routing: comments;;Chapter 6 outline;Mobile IP;Mobile IP: indirect routing;Mobile IP: agent discovery;Mobile IP: registration example;Components of cellular network architecture;Handling mobility in cellular networks;Public switched telephonenetwork ;;;home network;home network;Mobility: GSM versus Mobile IP;Wireless, mobility: impact on higher layer protocols;Chapter 6 Summary