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1. 发明公开

EP1290457A1 SPECTRUM MANAGEMENT METHOD FOR A CABLE DATA SYSTEM 审中-公开
标题翻译：有线数据系统的谱管理方法
公开(公告)号：EP1290457A1
公开(公告)日：2003-03-12
申请号：EP01922882.4
申请日：2001-03-30
申请人： MOTOROLA, INC.
发明人： COOPER, Michael, Jaimie , MORAN, John, L., III , MINER, Mark
IPC分类号： G01R31/08 , G06F11/00 , G08C15/00 , H04B17/00 , H04N17/00
CPC分类号： H04N7/17354 , H04H20/42 , H04H60/97 , H04L12/2801 , H04L43/10 , H04N21/42676 , H04N21/437 , H04N21/44245
摘要： In a cable modem system a method is provided for continuously monitoring the upstream channel to assess what unused upstream channels will better support data communication in the event that an active upstream channel degrades, with monitoring of the upstream path by using passive or unused channels not impacting active data transfer. In one embodiment, a single spectrum assessment receiver (20) polls cable modems (24) at various taps (16) and has the selected modem retune itself to an unused channel and transmit a reference signal back to the spectrum assessment receiver (20). An analysis is made and an impaired active channel is identified to ascertain if it has degraded to an unacceptable level. If so, it is switched or hopped to this unused channel if by switching an improvement can be realized. Polling selects the modem at the worst performing tap and ascertaining after one or more retunes which unused channel is best.
摘要翻译：在电缆调制解调器系统中，提供了一种用于连续监视上游信道以评估在活动上游信道降级的情况下哪些未使用的上游信道将更好地支持数据通信，以及通过使用不影响的被动或未使用信道来监测上游路径主动数据传输。在一个实施例中，单个频谱评估接收器（20）在各个分接头（16）处轮询电缆调制解调器（24），并使所选调制解调器自己重新调谐到未使用的信道并将参考信号发送回频谱评估接收器（20）。进行分析并确定受损的活动频道以确定其是否已降级到不可接受的水平。如果是这样，如果通过切换可以实现改进，则切换或跳转到这个未使用的信道。轮询选择调制解调器在性能最差的水龙头，并确定一个或多个重播后未使用的频道是最好的。

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