基于TCP友好控制机制的VoIP QoS研究  

Research of VoIP QoS based on TCP-friendly rate control mechanism

作　　者：曹龄兮[1] 李建华[1] 娄悦[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410075

出　　处：《计算机应用》2006年第9期2196-2198,共3页journal of Computer Applications

摘　　要：在基于UDP的VoIP应用中融入流量控制机制是确保其服务质量的重要方式。为了动态适应VoIP中的编码和分组,文中采用一种改进的TCP友好控制机制(TFRC)解决网络拥塞的问题,在端点对UDP语音流采用基于公式的发送速率调整,使之体现对TCP数据流的友好性。经过仿真和分析,该控制机制将公平地处理携带小分组的语音流和其他数据流,进一步保障了VoIP的服务质量(QoS)。It is important to introduce flow control mechanism into UDP（User Datagram Protocol） based VoIP（Video over IP） in order to guarantee its quality service. To get dynamically adapted to both the coding rate and packetization for VoIP Flows, this paper presented an improved TFRC（TCP-friendly rate control） mechanism to solve the congestion of Network, which provided the rate adjustment based on equation at the end host for the UDP streams to show TCP-friendly. By simulation and analysis, it is suggested that this new mechanism can fairly treat VoIP with small packets and other data flows with large packets, and guarantee QoS of VoIP.

关 键 词：IP语音 服务质量 TCP友好控制机制 拥塞 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]