Abstract: A communication network physical monitoring system and method employs a media converter device configured to transport communication/Ethernet data traffic and sense network physical layer conditions and/or events. An event controller device in communication with the media converter device receives transmissions indicating network physical layer conditions and/or events from the media converter device. The event controller is configured to transmit messages indicating the network physical layer conditions and/or events via a Social Media/Networking Service to devices that subscribe to receive messages from the event controller device on the Social Media/Networking Service.

Abstract: A communication network physical monitoring system and method employs a media converter device configured to transport communication/Ethernet data traffic and sense network physical layer conditions and/or events. An event controller device in communication with the media converter device receives transmissions indicating network physical layer conditions and/or events from the media converter device. The event controller is configured to transmit messages indicating the network physical layer conditions and/or events via a Social Media/Networking Service to devices that subscribe to receive messages from the event controller device on the Social Media/Networking Service.

Abstract: An implantable medical device system that senses physiologic processes via multiple sensor signal configurations. The device can further process the sensor configurations to obtain additional processed signal configurations. The device can utilize the processed configurations for ongoing sensing of the physiologic process. The device can also automatically evaluate the multiple sensor configurations as well as the processed configurations and select the configuration offering the best signal discrimination to reduce oversensing or erroneously interpreting secondary characteristics of the physiologic process as corresponding to primary characteristics of the process as in double-counting. The signal discrimination can be evaluated as an absolute margin and/or a ratio between amplitudes of the primary and secondary characteristics. The signal discrimination can also be evaluated based at least in part on a calculated mean and standard deviation according to each configuration.

Abstract: An implantable medical device system that senses physiologic processes via multiple sensor signal configurations. The device can further process the sensor configurations to obtain additional processed signal configurations. The device can utilize the processed configurations for ongoing sensing of the physiologic process. The device can also automatically evaluate the multiple sensor configurations as well as the processed configurations and select the configuration offering the best signal discrimination to reduce oversensing or erroneously interpreting secondary characteristics of the physiologic process as corresponding to primary characteristics of the process as in double-counting. The signal discrimination can be evaluated as an absolute margin and/or a ratio between amplitudes of the primary and secondary characteristics. The signal discrimination can also be evaluated based at least in part on a calculated mean and standard deviation according to each configuration.

Abstract: An implantable medical device system that senses physiologic processes via multiple sensor signal configurations. The device can further process the sensor configurations to obtain additional processed signal configurations. The device can utilize the processed configurations for ongoing sensing of the physiologic process. The device can also automatically evaluate the multiple sensor configurations as well as the processed configurations and select the configuration offering the best signal discrimination to reduce oversensing or erroneously interpreting secondary characteristics of the physiologic process as corresponding to primary characteristics of the process as in double-counting. The signal discrimination can be evaluated as an absolute margin and/or a ratio between amplitudes of the primary and secondary characteristics. The signal discrimination can also be evaluated based at least in part on a calculated mean and standard deviation according to each configuration.

Abstract: Techniques for reestablishing network address associations upon recovery of a passive optical network (PON) disablement rely on storage address association information. A network node stores address association information in non-volatile memory upon detecting a network disablement. Upon recovery of the PON from the disablement, the network node associates network addresses to clients in accordance with the address association information. The network node may further verify the associations by sending ARP queries for the network addresses to the associated clients. Alternatively, the network nodes may reestablish the address associations by tracking the length of time of the network disablement, and updating address association information in accordance with the length of the disablement.

Abstract: The invention is directed to techniques for reducing power consumption by an optical network transmitter (ONT) in a passive optical network (PON). The techniques may be particularly useful in extending the period of battery powered telephone service during a power outage. In particular, the invention provides a hibernation mode in which power is supplied only to a watchdog circuit while the ONT powers down the optical transmitter, the optical receiver, processing circuitry, data circuitry, video circuitry, and telephone circuitry to conserve power. The watchdog circuit wakes up a subset of the deactivated circuitry at service-critical events in order to service such events, but video and data processing circuitry remain deactivated.

Abstract: Techniques are described for converting multicast traffic to unicast traffic at an optical network terminal (ONT) on a passive optical network (PON). A traffic conversion technique, in accordance with the invention, involves formatting a multicast frame of a multicast packet stream transmitted to the ONT to include a MAC destination address of the station requesting the multicast packet stream. By including the MAC destination address of the specific station to which the multicast packet stream is to be transmitted, the multicast packet stream is effectively converted to unicast traffic stream. The traffic conversion techniques are designed to avoid overloading stations on a subscriber Ethernet network that are not participating in a multicast group by sending multicast traffic to the stations requesting the multicast traffic. In this way, the traffic conversion techniques allow common equipment to be used while not overburdening non-participating stations with traffic that needs to be discarded.

Abstract: Techniques are described for managing traffic flow to an optical network terminal (ONT) on a passive optical network (PON) to prevent an individual ONT from being overrun. Specifically, the techniques involve reducing a transmission rate of a unique traffic flow and selectively denying access to a common traffic flow. By reducing the transmission rate of the unique traffic flow, sufficient bandwidth may be released to receive the unique traffic flow and the common traffic flow without overflowing the ONT. For example, the ONT or, alternatively, the OLT may send the requested common traffic flow without reducing the transmission rate of the unique traffic flow when sufficient bandwidth is available, send the common traffic flow but reduce the transmission rate of unique traffic flow by an appropriate amount, or deny access to the common traffic flow altogether without reducing the transmission rate of the unique traffic flow.

Abstract: Techniques are described for managing traffic flow to an optical network terminal (ONT) on a passive optical network (PON) to prevent an individual ONT from being overrun. Specifically, the techniques involve reducing a transmission rate of a unique traffic flow and selectively denying access to a common traffic flow. By reducing the transmission rate of the unique traffic flow, sufficient bandwidth may be released to receive the unique traffic flow and the common traffic flow without overflowing the ONT. For example, the ONT or, alternatively, the OLT may send the requested common traffic flow without reducing the transmission rate of the unique traffic flow when sufficient bandwidth is available, send the common traffic flow but reduce the transmission rate of unique traffic flow by an appropriate amount, or deny access to the common traffic flow altogether without reducing the transmission rate of the unique traffic flow.

Abstract: The disclosure is directed to techniques for merging multiple data flows in a Passive Optical Network (PON). The PON comprises an interface module and a plurality of network nodes connected to the interface module via an optical fiber link. Each of the network nodes further serves client devices. The client devices request multiple data flows, requiring the interface module to serve multiple data flows to a network node for delivery to the devices. The interface module merges received data flows to permit multiple flows to be processed by a single segmentation and reassembly (SAR) engine, reducing hardware cost and complexity within the node. However, subunits associated with different data flows within a merged data flow are not interleaved with one another. Instead, the subunits associated with an original unit of information are transmitted contiguously within the merged data flow, facilitating identification and reassembly of the subunits for a particular microflow.

Abstract: Assignment of network addresses, e.g., IP addresses, to network nodes in a passive optical network (PON) may involve assignment of IP addresses within a common subnet scope to network nodes coupled to different optical fiber links and different interface modules in the PON. In this manner, excessive waste of IP addresses can be avoided. Instead of assigning an entire subnet scope of addresses to the nodes coupled to a single optical fiber link, a common subnet can be allocated across a PON having multiple, independent interfaces, increasing the number of subnet IP addresses that are actually used. Accordingly, the IP address space within a subnet scope can be distributed more efficiently. In addition to conserving IP addresses, the number of subnets allocated by ISPs can be reduced, along with the significant expense incurred by ISPs in reserving and maintaining multiple class C subnets.