Scheduler-directed source multiplexing for return path noise mitigation
AssigneeARRIS Enterprises LLC
InventorsFrancis J. O'KEEFFE, Thomas J. CLOONAN, Chris R. ZETTINGER, Zoran MARICEVIC, Michael B. HARRINGTON, Oleksandr VOLKOV
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Abstract
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.
Claims20
A node configured to receive respective scheduled upstream data signals from each of a plurality of modems and propagate received signals further upstream, each modem connected to the node by a respective one of at least two RF legs, the node comprising a steering subsystem configured to control a switch to selectively isolate the respective scheduled upstream data signals from noise present on any said RF leg not propagating a scheduled upstream data signal.
A method of operating a node configured to receive respective scheduled upstream data signals from each of a plurality of modems and propagate received signals further upstream, each modem connected to the node by a respective one of at least two RF legs, the method comprising:
- receiving scheduling information associating a time slot with respective cable modems scheduled to provide upstream data signals to the node;
- and
- operating a switch in the node to isolate any said RF leg from the scheduled upstream data signals during said time slot not scheduled to propagate a signal during said time slot.
A node configured to receive respective scheduled upstream data signals from each of a plurality of modems and propagate received signals further upstream, each modem connected to the node by a respective one of at least two RF legs, the node configured to associate upstream transmission schedule information for a cable modem with location information for a cable modem.
Dependencies are inferred from the claim text.