CMTS has played the key role in HFC's cable-data system, and its port resources are the key factors that manage a operational group of subscribers. Usually a port is provisioned to manage a cell which covers the geographically grouped subscribers in HFC network. Since each upstream or downstream port has got a certain capacity. too many subscribers assigned on a CMTS port make all the subscribers suffer from bandwidth contention. That's why service providers put a limit on per-cell subscribers(ie. 200 subscribers per cell). However, putting equal limit on the number of subscribers among ports has been proved not useful any longer.In my previous researchll I , I have discussed the issue of upstream bandwidth contention. This time, the paper will discuss how to maximize the port utilization from the service provider's viewpoint, especially by traffic load balancing. The method suggested is highly dynamical, economical, and has been implemented, field-tested. The paper will show not only the traffic engineering mechanism, but also the result of the test applying the mechanism.
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