背景

在一对跨地域的机器（美国<->香港），使用TCP（Cubic拥塞控制算法）通信throughput最高2MB/s，丢包率0.02%。使用UDP通信throughput最高能达到140MB/s。

这是一个非常典型的长肥管道（LFN），并且丢包 …

throughput and window size

The wisdom of STUP protocol is all about the window size. The throughput of a TCP communication is limited by two windows: the congestion window and the receive window. The congestion window can determine how many bytes that can be send a simple piece of time …

STUP Packet Structure

Brief Introduction of TCP & UDP Packet Structure

STUP pretend itself as a protocol at the Transmission Layer, but actually it's absolutely an Application Layer protocol. So before we start, I'd like to recall some knowledge of two important Transmission Layer protocol: TCP & UDP.

It is well known …

What is STUP?

STUP is the abbreviation of "Speeded/Secure Tcp-like Udp Protocol", which means that it's another TCP over UDP protocol.

Why TCP over UDP?

TCP is a network protocol for general purpose, and it's one of the most commonly used internet protocol on this planet. It is reliable …