Abstract: In some examples, an apparatus may be usable in a first network and configurable to operate within a proximity of a second network that communicates traffic that interferes with data communication in the first network. The apparatus may include a calculation module configured to calculate a packet loss rate. The apparatus may include a determination module coupled to the calculation module and configured to determine whether the packet loss rate exceeds a particular threshold level. The apparatus may include a preamble module coupled to the determination module and configured to dynamically adjust a number of protective bytes included in a packet preamble in response to a determination by the determination module that the packet loss rate exceeds the particular threshold level. The protective bytes may be effective to reduce packet corruption due to turnaround time collisions between packets communicated in the first network and traffic communicated in the second network.

Abstract: In some examples, a method may include determining whether a data packet is correctly received. In response to the data packet being correctly received, the method may include reading a received signal strength indication (RSSI) value, and based on the RSSI value, determining whether to transmit an acknowledgement (ACK) packet.

Abstract: In some examples, an apparatus may be usable in a first network and configurable to operate within a proximity of a second network that communicates traffic that interferes with data communication in the first network. The apparatus may include a calculation module configured to calculate a packet loss rate. The apparatus may include a determination module coupled to the calculation module and configured to determine whether the packet loss rate exceeds a particular threshold level. The apparatus may include a preamble module coupled to the determination module and configured to dynamically adjust a number of protective bytes included in a packet preamble in response to a determination by the determination module that the packet loss rate exceeds the particular threshold level. The protective bytes may be effective to reduce packet corruption due to turnaround time collisions between packets communicated in the first network and traffic communicated in the second network.

Abstract: In some examples, a method may include determining whether a data packet is correctly received. In response to the data packet being correctly received, the method may include reading a received signal strength indication (RSSI) value, and based on the RSSI value, determining whether to transmit an acknowledgement (ACK) packet.

Abstract: The inventive Limited perimeter Vector Matching fault localization method and system is launched when alarming sinks are identified. Each alarming sink broadcasts its node ID and path length, and all nodes compare their paths to identify an executive sink, which creates an Affected Link Vector consisting of the links in its lightpath, for multicast within a limited perimeter thereabout, the perimeter comprising all nodes within a neighborhood size. Each recipient returns an outcome vector corresponding to the ALV, together with a status, which indicate if the corresponding lightpath is healthy. For failed lightpaths, corresponding cells of the binary vector are set and cleared otherwise. For healthy lightpaths, bits are inverted. The vectors are ANDed by the executive sink to identify the disconnection. The exercise could be repeated for a progressively larger limited perimeter. The affected path is restored by link restoration. Multiple fault localization exercises may be simultaneously performed.

Abstract: A microprocessor based, digital to digital converting, full duplex time division multiplexing data set operating in burst mode transmission interfaces a data terminal to a communication path for communicating with another data terminal. The data set includes a transmitter, a receiver, a controlled transmit/receive switch, digital logic control circuitry, and a microprocessor for communicating with and controlling the other elements thereof. Communication is based on a bipolar code, and bipolar violation encoding is used to signal special messages. Control words, indicated by bipolar violations, are generated within one data set and transmitted to another data set as a preamble to a bipolar violation for communicating information to, and controlling operation of, the other data set. Special start and stop bits are generated by the data set before and after each fixed length data block for clock synchronization and DC balancing, and are stripped from the data clock by the receiving data set.