At present, various methods of estimating Quality of Service (QoS) of path transmission are in use, but they have following problems.
Firstly, the problem to estimate transmission QoS of multi-path must be settled. Multi-path transmission mode can be used at the time of transmitting real-time media based on Internet Protocol (IP) network. Most of the existing methods deal with the states of delay, jitter and packet loss between two ends, and it is unknown which path such parameters are from. Hence, estimation of QoS of multi-path transmission is important.
Secondly, instruments for QoS dynamic estimation should be prepared. When there is a change in path QoS, the existing statistical analysis instruments cannot estimate transmission QoS in real-time. Hence, QoS dynamic estimation instruments are needed.
Thirdly, path QoS must be comprehensively estimated. Indexes of QoS estimation include delay, jitter, band, packet loss rate, etc., which need comprehensive estimation.
On the basis of recent research on QoS estimation of transmission path, Han Ryong Ho, a researcher at the Faculty of Communications, has proposed a method for QoS estimation in multi-path transmission, and conducted a dynamic estimation analysis for real-time estimation to verify its effectiveness.
The proposed method is effective for dynamically and comprehensively evaluating the QoS of multi-paths between stages in an IP network.
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