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    • 1. 发明公开
    • SPECTRUM MANAGEMENT METHOD FOR A CABLE DATA SYSTEM
    • 有线数据系统的谱管理方法
    • EP1290457A1
    • 2003-03-12
    • EP01922882.4
    • 2001-03-30
    • MOTOROLA, INC.
    • COOPER, Michael, JaimieMORAN, John, L., IIIMINER, Mark
    • G01R31/08G06F11/00G08C15/00H04B17/00H04N17/00
    • H04N7/17354H04H20/42H04H60/97H04L12/2801H04L43/10H04N21/42676H04N21/437H04N21/44245
    • 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.
    • 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。
    • 4. 发明公开
    • SWITCH MATRIX PACKAGING FOR HIGH AVAILABLITY
    • 切换矩阵包装以实现高可用性
    • EP1330921A1
    • 2003-07-30
    • EP01981431.8
    • 2001-10-09
    • MOTOROLA, INC.
    • SIMOES, Michael, J.MORAN, John, L., IIIIVAS, Stanley
    • H04N7/173
    • H04N21/6118H04N7/104H04N7/17309H04N21/6168
    • A cable interface system for a high availability, high frequency cable network. An example embodiment includes a Radio Frequency Matrix Switch (10) which connects N cable head ends with N + 1 Cable Modem Termination Systems (14) by a set of coaxial cables (12) having 75 ohm BNC connectors in the forward path and 75 ohm connectors in the return path. Push-on type connectors along with reduced size connectors and cables provide increased access to connection points on interface panels. Angled interface panels (24, 26) on the Radio Frequency Matrix Switch provide increased connector space. Grouping of connection points on a the Radio Frequency Matrix Switch simplifies installation and replacement of cables. The Radio Frequency Matrix Switch can immediately switch a spare Cable Modem Termination System into service as necessary to avoid down time.
    • 用于高可用性,高频率电缆网络的电缆接口系统。 示例实施例包括射频矩阵开关(10),其通过一组同轴电缆(12)将N个电缆头端与N + 1个电缆调制解调器终端系统(14)连接,所述同轴电缆具有在正向路径中的75欧姆BNC连接器和75欧姆 连接器在返回路径中。 推入式连接器以及尺寸减小的连接器和电缆提供了对接口面板上连接点的更多访问。 射频矩阵式开关上的角度接口面板(24,26)提供增加的连接器空间。 射频矩阵开关上的连接点分组简化了电缆的安装和更换。 射频矩阵交换机可以根据需要立即将备用电缆调制解调器终端系统切换到服务状态,以避免停机时间。