Abstract: Analog echo cancellation with Digital-to-Analog Converter (DAC) noise suppression may be provided. First, a test signal may be sent through an echo cancelation pathway during a downstream silence period and an upstream silence period. The echo cancelation pathway may comprise an electronic element. Next, a loopback response signal may be received in response to sending the test signal through the echo cancelation pathway. Then a channel response model may be created that characterizes a channel response of the loopback response signal and a non-linear model may be created that characterizes a non-linearity of the electronic element. Next, for a downstream signal, a non-linear component may be generated based on the created non-linear model. The generated non-linear component may be convolved with the created channel response model. The convolved non-linear component may then be subtracted from an upstream signal.

Abstract: Digital pre-distortion may be provided. First, a radio frequency (RF) domain distortion correcting signal and a base band (BB) domain distortion correcting signal may be initialized. Then the RF domain distortion correcting signal may be generated from an input signal. The generated RF domain distortion correcting signal may correspond to an amplifier. Next, the BB domain distortion correcting signal may be generated from the input signal. The generated BB domain distortion correcting signal may correspond to the amplifier. Then the RF domain distortion correcting signal and the BB domain distortion correcting signal may be combined to form a hybrid distortion correcting signal. The hybrid distortion correcting signal may then be provided to input matching circuitry feeding the amplifier.

Abstract: Ringing suppression may be provided. First, a first ringing suppressor in a first branch of an amplifier may cancel interference from a second branch of the amplifier using a transmitted signal from the second branch as a reference. The first ringing suppressor may also cancel echo interference from the first branch of the amplifier using an output of the first ringing suppressor in the first branch as a reference. Furthermore, a second ringing suppressor in the second branch of the amplifier may cancel interference from the first branch of the amplifier using a transmitted signal from the first branch as a reference. Furthermore, the second ringing suppressor may cancel echo interference from the second branch of the amplifier using an output of the second ringing suppressor in the second branch as a reference.

Abstract: Echo cancellation may be provided. First, a feedback signal corresponding to a plurality of downstream paths may be received. Next, during an upstream silence period, a sample of a combination upstream signal may be received comprising a combination of upstream signals from a plurality of upstream paths. An echo correcting signal may then be created using the received feedback signal and the received sample of the combination upstream signal. Downstream echoes may be cancel from the combination upstream signal based on the created echo correcting signal.

Abstract: A quality of service framework for applications may be provided. First, a Bandwidth Report (BWR) message may be received from a first sub-system by a second sub-system. The BWR message may correspond to traffic to be received from the first sub-system by the second sub-system. Next, based on the BWR message, the second sub-system may schedule grants for the traffic to be received from the first sub-system. The second sub-system may then receive, from the first sub-system, the traffic. Then the second sub-system may transmit the traffic based on the scheduled grants.

Abstract: A virtual physical layer may be provided. When providing the virtual physical layer, a remote radio head may be used. The remote radio head may comprise a first interface device, a second interface device, a digital-to-analog converter, and an analog-to-digital converter. The first interface device may be connected to a virtual physical layer instance instantiated in a cloud-based environment. The second interface device may be connected to customer premises equipment. The digital-to-analog converter may be connected between the first interface device and the second interface device and the analog-to-digital converter may also be connected between the first interface device and the second interface device.

Abstract: Designs for a front end for suppressing adjacent channel interference (ACI) and adjacent leakage interference (ALI) in a full duplex cable modem (CM) for a Data Over Cable Service Interface Specification (“DOCSIS”) network are described. The CM includes an upstream (US) signal path receiving a digital US input signal and transmitting an analog-converted US signal in a US frequency range to a cable modem termination system (CMTS); a downstream (DS) signal path receiving an analog DS signal in a DS frequency range and converting the analog DS signal into a digital DS signal; and an echo cancellation (EC) circuit configured to subtract, from at least one of the analog DS signal and the digital DS signal, a correction signal generated from the digital US input signal or a correction signal generated from the analog-converted US signal to generate an echo-cancelled digital DS input signal without ACI and ALI.

Abstract: An example system and method for facilitating virtual cable modem termination system (VCMTS) migration in cable modem network environments is provided and includes spawning, by an orchestration component executing using a processor, a first instance of a virtual network function (VNF) on a first server in a cable modem network, storing state of the first instance as state information in an external database, spawning a second instance of the VNF on a different second server, synchronizing state of the second instance with the state information stored in the external database, and deleting the first instance. In specific embodiments, the VNF comprises a VCMTS.

Abstract: Predictive scheduling may be provided. First, a first device may identify when a service flow is expected to become active. The first device may estimate an initial traffic profile in response to identifying when the service flow is expected to become active. The first device may then grant allocation based on the initial traffic profile of the service flow. Next, the first device may collect feedback to later update the traffic profile estimate. The first device may then update the traffic profile estimate.

Abstract: A method is described and in one embodiment includes providing a physical connection between a node and a user equipment at a subscriber premises via a cable connection, wherein the node comprises a Data Over Cable Service Interface Specification (“DOCSIS”) remote PHY device (“RPD”) collocated with a cellular small cell device; receiving at the node a cellular downlink (“DL”) data signal from a cellular network connected to the cellular small cell device; combining the received cellular DL data signal with a DOCSIS downstream (“DS”) signal from a cellular network connected to the DOCSIS RPD to create a combined DS data signal; and forwarding the combined DS data signal from the node to the user equipment via the cable connection.

Abstract: An example apparatus comprises a processor, a memory element, and a media access control (MAC) scheduler. The MAC scheduler is configured to implement a transmission-reception (T-R) coordination scheme among a plurality of cable modems in a cable network, wherein the cable modems are categorized into interference groups. The MAC scheduler is further configured to assign one or more of the interference groups to at least one transmission group based upon predetermined criteria; and determine an upstream bandwidth constraint and downstream bandwidth constraint for the at least one transmission group, wherein the upstream bandwidth constraint and downstream bandwidth constraint is implemented by proportionally modifying an allocated upstream bandwidth and an allocated downstream bandwidth for the at least one transmission group to require that the sum of the allocated upstream bandwidth and the allocated downstream bandwidth does not exceed a spectrum capacity for the at least one transmission group.

Abstract: Radio Frequency (RF) Ethernet trunking may be provided. A networking system may comprise a first data pathway, a second data pathway, and a third data pathway. The first data pathway may be between a headend and a first node and may comprise a fiber optic channel using a first data transport protocol. The second data pathway may be between the first node and a second node and may comprise a first coaxial cable channel using the first data transport protocol over a first radio frequency spectrum. The third data pathway may be between the second node and a third node and may comprise a second coaxial cable channel using the first data transport protocol over the first radio frequency spectrum. The second data pathway and the third data pathway may comprise a data trunk using the first data transport protocol for data to and from the first node.

Abstract: A method is provided in one example and includes receiving a data signal, receiving an interference signal, wherein the interference signal is copied to create a reference data interference signal, combining the data signal and the interference signal to create a combined signal, using an analog echo cancellation engine on the combined signal to create an analog echo cancellation signal, and using a digital echo cancellation engine on the analog echo cancellation signal to create a data with echo cancellation signal. The data with echo cancellation signal can be communicated using a coaxial cable.

Abstract: Waterfall granting may be provided. First, a plurality of grants may be received for a service flow. Then a first plurality of packets may be placed in a first queue associated with the service flow in response to determining that the first plurality of packets corresponding to the service flow are associated with a first quality of service level. Next, a second plurality of packets may be placed in a second queue associated with the service flow in response to determining that the second plurality of packets corresponding to the service flow are associated with a second quality of service level. The first plurality of packets in the first queue may then be serviced from the plurality of grants until all the first plurality of packets in the first queue are serviced before servicing any of the second plurality of packets in the second queue with remaining ones of the plurality of grants.

Abstract: An example apparatus comprises a processor, and a memory element in communication with the processor. The processor configured to send a first message to at least a first cable modem of a plurality of cable modems. The first message indicates an upstream test signal to be generated by the first cable modem within a predetermined portion of a frequency spectrum allocated for downstream communication. The processor is further configured to send a second message to at least a second cable modem of the plurality of cable modems. The second message indicates a downstream interference measurement to be performed on the upstream test signal by the second cable modem. The processor is further configured to receive at least one interference measurement result indicative of the downstream interference measurement, and determine at least one interference group for the plurality of cable modems based upon the at least one interference measurement result.

Abstract: An example apparatus comprises a processor, and a memory element in communication with the processor. The processor configured to send a first message to at least a first cable modem of a plurality of cable modems. The first message indicates an upstream test signal to be generated by the first cable modem within a predetermined portion of a frequency spectrum allocated for downstream communication. The processor is further configured to send a second message to at least a second cable modem of the plurality of cable modems. The second message indicates a downstream interference measurement to be performed on the upstream test signal by the second cable modem. The processor is further configured to receive at least one interference measurement result indicative of the downstream interference measurement, and determine at least one interference group for the plurality of cable modems based upon the at least one interference measurement result.

Abstract: An example apparatus comprises a processor, a memory element, and a media access control (MAC) scheduler. The MAC scheduler is configured to implement a transmission-reception (T-R) coordination scheme among a plurality of cable modems in a cable network, wherein the cable modems are categorized into interference groups. The MAC scheduler is further configured to assign one or more of the interference groups to at least one transmission group based upon predetermined criteria; and determine an upstream bandwidth constraint and downstream bandwidth constraint for the at least one transmission group, wherein the upstream bandwidth constraint and downstream bandwidth constraint is implemented by proportionally modifying an allocated upstream bandwidth and an allocated downstream bandwidth for the at least one transmission group to require that the sum of the allocated upstream bandwidth and the allocated downstream bandwidth does not exceed a spectrum capacity for the at least one transmission group.

Abstract: An example system and method for facilitating virtual cable modem termination system VCMTS redundancy in cable modem network environments is provided and includes spawning a first instance of a virtual network function (VNF) on a first server in a cable modem network, spawning a second instance of the VNF on a different second server, configuring the second instance to be communicatively coupled to the first instance in a same subnet of the network, and synchronizing (e.g., copying, coordinating, matching, etc.) state between the first instance and the second instance. In specific embodiments, the VNF comprises a VCMTS.

Abstract: One embodiment is a method and includes receiving at a termination element of a first network a bandwidth report (“BWR”), in which the BWR includes information regarding a data transmission opportunity over a second network for at least one endpoint data; scheduling a first network transmission opportunity for the at least one endpoint data using information derived from the received BWR; and receiving from a 5 first network forwarding device the at least one endpoint data in accordance with the scheduled first network transmission opportunity.

Abstract: A method is provided in one example and includes receiving a data signal, receiving an interference signal, wherein the interference signal is copied to create a reference data interference signal, combining the data signal and the interference signal to create a combined signal, using an analog echo cancellation engine on the combined signal to create an analog echo cancellation signal, and using a digital echo cancellation engine on the analog echo cancellation signal to create a data with echo cancellation signal.