TCP Congestion Control

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TCP Congestion Control Congestion occurs when total arrival rate from all packet flows exceeds R over a sustained(维持) period of time Buffers(缓冲) at multiplexer will fill and packets will be lost Phases of Congestion Behavior Light traffic Arrival Rat…

Network | TCP congestion control

拥塞控制算法:1. 加性增.乘性减:2. 慢启动:3. 对超时事件作出反应: 整体过程如下: 慢启动->到达阈值->加性增(窗口+1个MSS), 这个阶段叫拥塞避免(CA)->3个冗余ack丢包(事件)->阈值和窗口都缩小为一半(乘性减), 然后加性增(CA)->快速重传,并等待确认,这个阶段叫快速恢复,如果没有确认,就当作超时事件处理了: ->超时(事件)->快速重传->tcp会重新回为原始状态,进入慢启动: 在发生丢包和超时时,tcp都会执行快速重传:…

TCP Flow Control and Data Transfer

TCP Flow Control TCP Data Transfer Selective Repeat ARQ with Positive ACK Window slides a byte basis instead packet basis Dynamically advertising the window size TCP Window Flow Control TCP Connection Management Select initial sequence numbers (ISN)…

Google Congestion Control介绍

随着网络带宽的日益增加和便携式设备,如智能手机或平板电脑处理能力的增强,基于互联网的实时通信已经成为热点. 虽然视频会议已商用了多年,特别是SKYPE这样的视频应用在互联网上已有10年时间,但针对实时音视流高效传输的内部控制标准却是空白.所以标准化组织IETF和W3C准备解决这个问题(2011-2013年). IETF的RTCWeb 想法是把用于实时媒体流的网络拥塞控制算法标准化成协议. W3C的WebRTC想法是标准化一套HTML5的API用于网络浏览器的实时流媒体. CISCO向IETF提出…

java基础 UDP通信 user datagram protocol 用户数据豆协议 TCP transmission control protocol 传输控制协议多线程TCP

无连接通信 UDP 客户端 package com.swift.test; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.util.Scanner; /*使用UDP通信编写一个Java程序.要求:获取键盘输入的内容.发送到服务端.服务端接收后.在控制台上打印接收到的内容客戶端…

Congestion Avoidance in TCP

Congestion Avoidance in TCP Consequence of lack of congestion control When a popular resource is shared without regulation the result is always over-utilization With the introduction of TCP in 1983, users can write networking applications that requir…

Internet History,Technology,and Security -Transport Control Protocol(TCP)（Week6）

Week6 Technology: Transport Control Protocol(TCP) Welcome to Week 6 of IHTS. We are in our second week of the more technical bits of the course. I try to keep the technical bits interesting and not go into too much detail.This week, we’ll be covering…