According to examples, a system for measuring and analyzing data to generate recommendations associated with a digital subscription line (DSL). Data associated with a DSL is measured according to one or more performance counters. The data is analyzed with respect to one or more thresholds and an anomalous performance event is determined. Also, a recommendation with respect to an performance issue associated with the anomalous performance event is provided.

Methods and systems are provided for power management in communication devices, particularly based on cable connectivity. A power management component in a system may be configured to obtain measurements associated with a signal path used for communication by the system via a communication port, and manage power use in the system based on the obtained measurement. Managing the power use may include determining, based on the obtained measurements, connectivity related information associated with connectivity of the system via the communication port, and applying based on the information one or more power use reduction measures, with the one or more power use reduction measures including at least transitioning between different power related states.

Methods and systems are provided for power management in communication devices, particularly based on cable connectivity. A power management component in a system may be configured to obtain measurements associated with a signal path used for communication by the system via a communication port, and manage power use in the system based on the obtained measurement. Managing the power use may include determining, based on the obtained measurements, connectivity related information associated with connectivity of the system via the communication port, and applying based on the information one or more power use reduction measures, with the one or more power use reduction measures including at least transitioning between different power related states.

Techniques for testing a networked system using simulated abnormal node failure are disclosed. In some embodiments, a computer system performs operations comprising: repeatedly transmitting simulated requests to a networked system on which a software application is implemented using a plurality of nodes, the networked system being configured to respond to the simulated requests using the plurality of nodes; randomly selecting one or more nodes from the plurality of nodes; terminating the randomly selected one or more nodes; restarting the terminated randomly selected one or more nodes; repeating the randomly selecting one or more nodes, the terminating the randomly selected one or more nodes, and the restarting the terminated randomly selected one or more nodes until each one of the plurality of nodes has been terminated and restarted at least once during the first period of time; and determining response times of the networked system in responding to the simulated requests.

An EVM measurement value is appropriately determined while CPE/ICI correction is taken into account. In a measurement apparatus (300), an EVM measurer (305) measures a modulation quality of a signal transmitted from a transmission apparatus. An EVM determiner (306) determines whether or not the measurement value of the modulation quality is equal to or less than a first requirement value, in a case where correction relating to a phase noise of the transmission apparatus is necessary in a reception apparatus. The first requirement value herein is higher than a second requirement value used in the determination of the measurement value in a case where the correction relating to the phase noise of the transmission apparatus is unnecessary in the reception apparatus.

An EVM measurement value is appropriately determined while CPE/ICI correction is taken into account. In a measurement apparatus (300), an EVM measurer (305) measures a modulation quality of a signal transmitted from a transmission apparatus. An EVM determiner (306) determines whether or not the measurement value of the modulation quality is equal to or less than a first requirement value, in a case where correction relating to a phase noise of the transmission apparatus is necessary in a reception apparatus. The first requirement value herein is higher than a second requirement value used in the determination of the measurement value in a case where the correction relating to the phase noise of the transmission apparatus is unnecessary in the reception apparatus.

A gear shifting technique has been developed in which modulation and equalization are shifted to achieve optional performance. In one form, two or more equalizers, each associated with a demodulator and message decoder, determine if the modulation being used can be increased in complexity in order to increase the channel throughput or determine if the modulation method should be reduced in complexity in order to improve the receiver error performance. The quality metrics can based on which equalizer-demodulator-decoder is set to first detect a valid message. Other factors can be considered with this technique such as a packet-error ratio and a signal-to-noise ratio. In a financial trading system, message erasures can be favored over errored messages by limiting the number of bit or symbol corrections permitted per message to less than the maximum possible for the selected decoding schemes.

A communication system intended for use in a motor vehicle includes a plurality of devices (26, 28), a transmission channel (32) that connects the plurality of devices (26, 28) to one another, and a signal source (30) coupled to the transmission channel (32). Each of the devices (26, 28) includes a control unit (36) configured for evaluating signals of the transmission channel (32), and at least two coupling units (38, 40) configured for connecting and disconnecting the particular device (26, 28) to/from the transmission channel (32). The control units (36) of the devices (26, 28) are configured for causing the coupling units (38, 40), at a certain point in time, in each case to connect no more than one of the devices (26, 28) to the transmission channel (32), and to disconnect the other of the devices (26, 28) from the transmission channel (32).

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

Disclosed are a method and apparatus for measuring wireless performance of a receiver of a wireless terminal, and a non-transitory computer readable storage medium. The method includes the following. A measured signal of a receiver to be measured is determined. Measured signals of other receivers except the receiver to be measured are zero. Multiple transmitted signals are determined based on the measured signals. The multiple transmitted signals are transmitted through multiple measurement antennas. When a bit error rate of the receiver to be measured does not equal a preset bit error rate, the measured signal is adjusted, determining the multiple transmitted signals based on the updated measured signal. When the bit error rate equals the preset error rate, a power of the measured signal is determined as the radiant sensitivity of the receiver to be measured.