Arris Enterprises LLC

Arris Group, Inc.

Michael B Harrington

Thomas J Cloonan

Chris R Zettinger

Oleksandr Volkov

Frank O'Keeffe

Francis J O'keeffe

Zoran Maricevic

Francis Joseph O'Keeffe

Yury Kharkunou

Denis Downey

Alex Volkov

Patricia Tessier

Darrick Wilson

Dermot Lucey

Devices, systems and methods that reduce funneling noise in upstream data transmissions from modems providing the transmissions through respective RF legs connected to the node. Preferred devices and systems may include a node that is configured to selectively isolate respectively scheduled upstream data signals from noise present on any RF leg not propagating a scheduled upstream data signal.

Scheduler-directed source multiplexing for return path noise mitigation

Systems and methods for permitting DOCSIS 3.1 equipment to operate at higher frequencies than specified in the DOCSIS 3.1 standard. Exemplary systems may be capable of alternating between a first mode of operation that provides DOCSIS 3.1 compatible services and a second mode of operation providing a higher level of service than DOCSIS 3.1.

Systems and methods for upstream and downstream CATV plant capacity expansion

Systems and methods can provide for Edge-QAM and M-CMTS timing lock. In some implementations, an Edge-QAM can provide for timing lock with an M-CMTS core by observing DOCSIS-SYNC MAC messages. In other implementations, an Edge-QAM can provide for timing lock with an M-CMTS core by observing per-modem ranging MAC messages. In other implementations, an EQAM can provide for timing lock with an M-CMTS core by performing timing lock check and adjustment. Using existing protocol messages defined in the M-CMTS architecture, the EQAM can intercept, snoop, and extract timing values from the M-CMTS core thereby reducing or even eliminating the need for a DTI server.

Edge-QAM and M-CMTS core timing lock

Methods, systems, and apparatuses can provide a plurality of RF channels and outputs using digital modulation and combining. In various examples, generation of digital IQ packetized data in combination with digital switching can increase the number of RF modulated channels, optimize broadcast transmission and/or provide transmission resiliency.

Resilient channel and broadcast modulation

Methods, systems, and apparatus can provide a plurality of RF outputs using a single digital to analog convertor (DAC) for digitally modulated data. In various examples, an intermediate frequency (IF) containing one or more digitally modulated channels is frequency down converted to meet the radio frequency (RF) specifications of a communication system.

Generation of radio frequency outputs

The clocks of one or more edgeQAM devices are synchronized with a master clock at the remotely located CMTS. A master clock signal may be transmitted via a dedicated gigabit Ethernet link. Alternatively, master clock information contained in a time synchronization message may be transmitted for use in adjusting local oscillators that drive local clocks at respective edgeQAM devices.

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Cork, Ireland

Michael B Harrington