Abstract: Combining network and client based adaptive streaming approaches enable a distributed and adaptive resource management system for carrier quality video transmission over cable Wi-Fi systems. The adaptive resource management over cable Wi-Fi heterogeneous networks includes a network based approach using client based feedback. The resource management of a video stream is performed on a service provider's network, for example in a cable modem termination system, by evaluating a margin and a fairness index. In embodiments, the rate of a video stream to a requesting client is adjusted and, in embodiments, the rate of a video stream for non-requesting clients is adjusted. Embodiments include mechanisms for call admission control and adaptive streaming based on adjustable resource margins and fairness indices for DOCSIS and Wi-Fi hetnet systems.

Abstract: Combining network and client based adaptive streaming approaches enable a distributed and adaptive resource management system for carrier quality video transmission over cable Wi-Fi systems. The adaptive resource management over cable Wi-Fi heterogeneous networks includes a network based approach using client based feedback. The resource management of a video stream is performed on a service provider's network, for example in a cable modem termination system, by evaluating a margin and a fairness index. In embodiments, the rate of a video stream to a requesting client is adjusted and, in embodiments, the rate of a video stream for non-requesting clients is adjusted. Embodiments include mechanisms for call admission control and adaptive streaming based on adjustable resource margins and fairness indices for DOCSIS and Wi-Fi hetnet systems.

Abstract: A device for stacking signals in an expanded frequency range includes an upconverter and a multiplexer. The upconverter is configured to receive upstream signals that are in a first frequency range, upconvert some of the upstream signals that are in a first frequency sub-range of the first frequency range and pass some of the upstream signals that are in a second frequency sub-range of the first frequency range. The multiplexer is configured to stack the upconverted upstream signals and the upstream signals in the second frequency sub-range and output the stacked upstream signals.

Abstract: Provided is a device for use with a headend, a household and an amplifier. The headend is able to provide signals within a high-frequency band fH. The household is able to provide signals within a low-frequency band fL, and to provide signals within a super-high-frequency band fR, where fL<fH<fR. The device includes a splitter, a diplexer and a combiner. The splitter is arranged to receive the signals within the high-frequency band fH and to split the signals within the high-frequency band fH into a first signal portion within the high-frequency band fH and a second signal portion within the high-frequency band fH. The diplexer is operable to pass the second signal portion within the high-frequency band fH to the household, to pass the signals within the low-frequency band fL to the splitter and to pass the signals within the super-high-frequency band fR.

Abstract: Provided is a device for use with a headend, a household and an amplifier. The headend is able to provide signals within a high-frequency band fH. The household is able to provide signals within a low-frequency band fL, and to provide signals within a super-high-frequency band fR, where fL<fH<fR. The device includes a splitter, a diplexer and a combiner. The splitter is arranged to receive the signals within the high-frequency band fH and to split the signals within the high-frequency band fH into a first signal portion within the high-frequency band fH and a second signal portion within the high-frequency band fH. The diplexer is operable to pass the second signal portion within the high-frequency band fH to the household, to pass the signals within the low-frequency band fL to the splitter and to pass the signals within the super-high-frequency band fR.

Abstract: A device for stacking signals in an expanded frequency range includes an upconverter and a multiplexer. The upconverter is configured to receive upstream signals that are in a first frequency range, upconvert some of the upstream signals that are in a first frequency sub-range of the first frequency range and pass some of the upstream signals that are in a second frequency sub-range of the first frequency range. The multiplexer is configured to stack the upconverted upstream signals and the upstream signals in the second frequency sub-range and output the stacked upstream signals.

Abstract: An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.

Abstract: A method and system for multi-port aggregation in a digital return path CATV system digitizes each of a plurality of return path signals, splits each of the plurality of return path signals into a low band and an upper band (41), combines each of the plurality of low band signals to form a combined low band signal (43), downconverts each of the plurality of upper band signals from an original frequency range into a new downconverted frequency range (45) and time division multiplexes the plurality of downconverted upper band signals with the combined low band signal to form an aggregate data stream (46).

Abstract: In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified ?-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this bit reduction when compared to current transmission methods without this technique.

Abstract: A system and method are provided for performing wireless diversity processing in a data-over-cable network. A diversity controller is provided which, based on signal-to-noise ratio, chooses an optimal path for receiving and transmitting data to and from a subscriber location. A stand-mounted access point enables wireless communication with subscriber locations. Diversity processing includes selection diversity, maximal rate combining, and equal gain combining.

Abstract: In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified &mgr;-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this bit reduction when compared to current transmission methods without this technique.

Abstract: An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.

Abstract: Docket: D2459 A system and method for increasing the performance of a digital return path in a hybrid-fiber-coax television system using baseband serial optical transport, receives an analog composite return path waveform at a comparator input to a digital return transmitter that includes an A/D converter and a first nonlinear processor. A first processing function is applied to a signal output from the comparator at the first nonlinear processor and the processed signal is forwarded to the A/D converter which converts the processed signal to generate a quantized output signal of a sequence of digital words whose value represent analog signal samples. The quantized digital signal is output to an output of the digital return transmitter and to a feedback loop including a D/A converter, which converts the quantized digital signal to an analog feedback signal and forwards the analog feedback signal to a second processor.

Abstract: An HFC return path system for digital communication signals using a sampled RF word interface to headend demodulators, provides higher performance equipment at an equivalent or lower cost and more flexible and efficient interfacing and traffic multiplexing. The return path signal from the fiber optic node to the headend/hub is represented ones and zeroes, and the digital return receiver at the headend/hub includes an optical receiver for receiving the serial stream of optical ones and zeroes and converting the optical digital signal to an electrical digital signal, a deserializer for deserializing the serial stream of digital words and synchronization information into parallel digital words, a digital filter for processing the deserialized digital words to interface digitally to an application receiver and a digital interface for interfacing and forwarding the processed parallel digital words to the application receiver.