Traffic quality monitoring system between different network providers

In this paper, we propose a network performance monitoring method which can measure delay of each network using the RTCP(Real-time Transport Control Protocol) timestamp fields to detect a trouble section in interworking environment. According to the increment of real-time multimedia service provision, network performance monitoring method is necessarily needed for QoS management of real-time services in the interworking environment between different networks. Multimedia services such as video conference, VoIP (Voice over IP) service and IPTV service are sensitive to the network performance(e.g. delay, delay variance and packet loss etc). In this case, it is very important to detect a trouble section when service quality degradation occurs in the interworking environment. So, we propose the network monitoring method for multimedia services through delay measurement using RTCP in each network. Also, with this method, we can detect and define which network has generated a poor network performance.