在传输控制模块中，我们应用rtsp来初始化传输，用RTP来传输音视频数据，用TFRC协议来避免拥塞发生。
In transmission control module, we make use of RTSP to initialize transmission, RTP to transmit data, TFRC to avoid congestion.
数据报拥塞控制协议(DCCP)是IETF提出的一种新的传输层协议。
Datagram congestion control protocol (DCCP) is a new transport protocol put forward by IETF.
传统的TCP协议是针对有线网络设计的，它认为数据包的丢失皆是由网络拥塞造成，从而启动拥塞控制过程。
Traditional TCP protocol's design was just concerning about wire network. It contributes the loss of data package to network congestion and employ congestion-control process to solve the problem.
RTP/RTCP协议为网络实时数据提供端到端的传输、时序重构、帧遗失检测、数据安全、拥塞控制等多种服务，支持多播或单播网络。
RTP/RTCP provides end-to-end transmission, timing reconstruction, frame loss detection, data security, congestion control, and other services for real-time data over multicast or unicast network.
RTP/RTCP协议为网络实时数据提供端到端的传输、时序重构、帧遗失检测、数据安全、拥塞控制等多种服务，支持多播或单播网络。
RTP/RTCP provides end-to-end transmission, timing reconstruction, frame loss detection, data security, congestion control, and other services for real-time data over multicast or unicast network.
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