SCTP（Stream Control Transmission Protocol，流控制传输协议）是IETF（Internet Engineering Task Force，因特网工程任务组）在2000年定义的一个传输层（Transport Layer）协议，是提供基于不可靠传输业务的协议之上的可靠的数据报传输协议。SCTP的设计用于通过IP网传输SCN（Signaling Communication Network，信令通信网）窄带信令消息。后期广泛用于EPC网络中的S6a/S1/Sgs/Sv等接口中(SCTP (Stream Control Transmission Protocol) is a Transport Layer protocol defined by the IETF (Internet Engineering Task Force) in 2000, which provides a protocol based on unreliable transmission services Reliable datagram transmission protocol. SCTP is designed to transmit SCN (Signaling Communication Network) narrowband signaling messages over IP networks. Late for the EPC network in the S6a / S1 / Sgs / Sv and other interfaces)