Abstract: Analysis on the QoS distribution monitoring approach proposed by Yuming Jiang, Chen-Khong Tham, and Chi-Chung Ko is presented. Based on this, a definition of KNS has been given. Two approaches that could be used to locate KNS were proposed, analyzed, and compared. Having located the KNS, resources could be tuned to guarantee the contracted QOS.

Key words:  quality of service ( QoS), QoS management, QoS monitoring, key network segment ( KNS) locating