TCP-Like Threshold Window (TCP-like TW) is a new congestion control mechanism for Datagram Congestion Control Protocol (DCCP) over long delay link network, and it is designed to ease the problem in DCCP, such as longer time taken for achieving maximum throughput, and throughput fluctuation during congestion avoidance phase, that can degrade the network performance. As TCP-like TW is based on the TCP-like, one of the congestion control mechanism for DCCP, it is for the transmission of abruptly changes and bursty streaming multimedia data traffic over the network. However, TCP-like causes problems when delivering multimedia data over long delay link. Two approaches have been used for TCP-like TW, i.e. setting of appropriate slow-start threshold size and congestion window manipulation during congestion avoidance phase. It has been developed and implemented in Network Simulator 2 (ns-2) and has proven to enhance the performance of DCCP when delivering multimedia data over long delay link networks, as well as over short delay. For long delay link, TCP-like TW congestion control algorithm is able to minimize the time taken to archive maximum throughput and can smooth the fluctuate throughput after achieving the maximum throughput, whereas for short delay link, the maximum throughput will increase while maintaining the friendliness towards other congestion-controlled protocols.