• Chap 10: Introduction to Network Coding • Chap 11: Network Coding in Wireless Networks • Chap 12: A Practical Network Coding System

• Introduction to Traffic Engineering • Historical and Present Traffic Engineering Approaches • Recommendations for Internet Traffic Engineering • Contemporary TE Practices in Operational IP Networks

• Introduction • Economic principles • Traffic classes • Time scales • Mechanisms • Some open problems on traffic management

• Overview of QoS in IP networks • Integrated Service model (IntServ) • Resource Reservation Protocol (RSVP) • Differentiated Services model (DiffServ)

• Why Scheduling? • Problem Definition • Metrics and Requirements of Scheduling Discipline • Mechanisms to Create a Scheduling Discipline • Scheduling Disciplines for Best Effort Connections • Scheduling Disciplines for Guaranteed-service Connections • QoS Service curve model

• Why packet drop • Classification of drop strategies • IP Active Queue Management(AQM) - RED - FRED - BLUE - RIO • Case study: Performance of Selective Discard

• Review of TCP • TCP flow control and congestion control • TCP over wireless • Case study: New Snoop for TCP in Wireless networks Roadmap

 What and why is traffic shaping and traffic policing  Leaky Bucket  Token Bucket Traffic  Generic Cell Rate Algorithm (GCRA) -Virtual scheduling algorithm implementati - Leaky bucket algorithm implementation

电子科技大学：《先进计算机网络技术》课程教学资源（课件讲稿）Introduction（冯钢）

一、什么是多径效应? 移动通信电波传播最具特色的现象是多径 衰落,或称多径效应。无线电波在传输过程中会 受到地形、地物的影响而产生反射、绕射、散射 等,从而使电波沿着各种不同的路径传播,这称 为多径传播。由于多径传播使得部分电波不能到 达接收端,而接收端接收到的信号也是在幅度、 相位、频率和到达时间上都不尽相同的多条路径 上信号的合成信号,因而会产生信号的频率选择 性衰落和时延扩展等现象,这些被称为多径衰落 或多径效应