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    • 1. 发明授权
    • Performance customization system and process for optimizing XDSL performance
    • 性能定制系统和优化XDSL性能的流程
    • US06647058B1
    • 2003-11-11
    • US09102176
    • 1998-06-22
    • Gordon BremerCraig Matthews
    • Gordon BremerCraig Matthews
    • H04B138
    • H04B3/46H04L1/0002H04L1/002H04L5/143H04L5/1438H04L5/16Y02D50/10
    • A system and process for customizing the performance of an xDSL communication system in which a transmitting modem and a receiving modem will negotiate a performance parameter for adjustment. The receiving modem measures the signal to noise ratio on the xDSL loop and, based on that measurement, sends a request to the transmitting modem to make a specific adjustment to the selected performance parameter. The transmitting modem will make the adjustment upon receipt of the request from the receiving modem. In a preferred embodiment, the modems will choose either the data rate or the transmission power level as the performance parameter for adjustment. In a multiple xDSL system in which the xDSLs affect each others' performance through crosstalk, the present invention allows a first modem pair to instigate a transmission power reduction, which will in turn allow a second modem pair to either increase its present data rate or decrease its transmission power. Through this combination of transmission power adaptation and data rate adaptation, it is possible to reduce the performance variance between the individual communication sessions or customize the performance profile according to specific customer requirements.
    • 用于定制xDSL通信系统的性能的系统和过程,其中发射调制解调器和接收调制解调器将协商用于调整的性能参数。 接收调制解调器测量xDSL回路上的信噪比,并且基于该测量,向发送调制解调器发送请求以对所选择的性能参数进行特定调整。 发送调制解调器将在接收到来自调制解调器的请求时进行调整。 在优选实施例中,调制解调器将选择数据速率或发送功率电平作为用于调整的性能参数。 在其中xDSL通过串扰影响彼此的性能的多xDSL系统中,本发明允许第一调制解调器对来发起传输功率降低,这进而允许第二调制解调器对增加其当前数据速率或减小 其传输功率。 通过传输功率适配和数据速率适配的组合,可以减少各个通信会话之间的性能差异,或根据特定的客户要求定制性能特征。