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    Test signalling
    1.
    发明授权
    Test signalling 有权
    测试信号

    公开(公告)号：US07050924B2

    公开(公告)日：2006-05-23

    申请号：US10276711

    申请日：2001-05-25

    申请人： Antony W Rix ,  Philip Gray ,  Richard J B Reynolds ,  Michael P Hollier

    发明人： Antony W Rix ,  Philip Gray ,  Richard J B Reynolds ,  Michael P Hollier

    IPC分类号： H04B17/00

    CPC分类号： H04W24/00 ,  H04M3/22

    摘要： The perceptibility of degradations caused to signals transmitted over a transmission medium is measured by generating one or more predetermined transmission degradation conditions (et) and subjecting a test signal (St) to the transmission degradation conditions (et) in a network simulation device. The degree M(e) to which the or each transmission degradation condition (et) is perceptible to the human perceptual system is measured and a data set is generated and stored for converting one or more transmission degradation conditions (et) to respective values of perceptibility M(e). The data set may be a look-up table or an empirically determined formula. The data set may then be used on live traffic (S′), by identifying objectively measured transmission degradation conditions (e) in the received signal (S′) and retrieving from the data set in the data storage means (7) a value of perceptibility (M) associated with the transmission degradation conditions (e) so identified. In this way a measure of the subjective significance of degradation in the signal (S′) can be derived from objective measures of degradation.

    摘要翻译： 通过产生一个或多个预定的传输劣化条件（e> t）并对测试信号（S SUB）进行测量，来测量对通过传输介质传输的信号造成的劣化的可感知性， 到网络仿真设备中的传输劣化条件（e> t）。 测量对人感知系统感知到或每个传输劣化条件（e t）的程度M（e），并且生成并存储用于转换一个或多个传输劣化条件的数据集 （e /）相应的感知度值M（e）。 数据集可以是查找表或经验确定的公式。 然后可以通过在接收到的信号（S'）中识别客观测量的传输劣化条件（e）并且从数据存储装置（7）中的数据集中检索数据集，从而可以在实时业务（S'）上使用数据集 与所识别的传输降解条件（e）相关的感知度（M）。 以这种方式，信号（S'）退化的主观意义的度量可以从客观的降解测量得出。

    Measurement of signal quality
    4.
    发明授权
    Measurement of signal quality 有权
    信号质量测量

    公开(公告)号：US06718296B1

    公开(公告)日：2004-04-06

    申请号：US09786885

    申请日：2001-03-09

    申请人： Richard J B Reynolds ,  Antony W Rix ,  Michael P Hollier ,  Gray Philip ,  Eleanor J Beamond

    发明人： Richard J B Reynolds ,  Antony W Rix ,  Michael P Hollier ,  Gray Philip ,  Eleanor J Beamond

    IPC分类号： G10L1900

    CPC分类号： H04M3/2236

    摘要： Apparatus for assessing the performance of telecommunications systems by comparison of a reference signal with the same signal as degraded by the system under test tends to give unreliable results when used to test connectionless packet-switching equipment. This is because variable delay in delivery of the individual packets can result in the test signal and reference signal becoming unsynchronised. This may lead to the apparatus recording a poorer performance than a human tester would have recorded. To overcome this problem, the invention separates the test signal into a series of individual sections, which are synchgronised and analysed separately, and a quality value, aggregated over all the sections, is derived.

    摘要翻译： 通过比较参考信号与被被测系统劣化的相同信号来评估电信系统的性能的装置在用于测试无连接分组交换设备时趋于给出不可靠的结果。 这是因为单个分组的传送中的可变延迟可导致测试信号和参考信号变得不同步。 这可能导致设备记录比人类测试人员记录的更差的性能。 为了克服这个问题，本发明将测试信号分成一系列单独的部分，这些部分被同步化并分开分析，得出了在所有部分上聚集的质量值。