A Metric Model for Access Network Management
Jian Wei Gong · 2008
Network metric is the foundation of network measurement and plays a significant role in the research of net- work behavior.Both TCP layer oriented metrics and IP layer oriented metrics have advantages and disadvantages. Therefore,to take advantage of both is a meaningful subject.This paper gives quantitative balance metrics of bidirec- tional packets for both TCP connection and IP access network based on the direction of packet delivery.By the analysis of TCP protocol specification,the formula to calculate the former is presented and how to map the former to the latter is discussed.Then thehelthrange of the quantitative balance metric for access network is given based on real trace and by referring to the method in the research of medical metrics,as well.In addtion,the selection of time bin to calcu- late the metric is also discussed,thus makes it a utility index to evaluate the running state of the network.So,a com- plete model is established which can be applied directly to access network management.