Dynamic segmentation of network traffic through the use of Pre-Shared Keys (PSKs). Each defined network segment uses a different pre-shared key and a message authentication code (MAC)-signing algorithm to sign data packets with segment-specific MACs. As such, only those computer hosts/nodes that are in the network segment (i.e., have been assigned the same pre-shared key for generating and decoding the MAC signed data packets) are capable or reading the segment's network traffic. By implementing segment-specific MAC signed data packets, the present invention allows for confidential data transmission absent the need to encrypt the actual contents/data being transmitted.

Dynamic segmentation of network traffic through the use of Pre-Shared Keys (PSKs). Each defined network segment uses a different pre-shared key and a message authentication code (MAC)-signing algorithm to sign data packets with segment-specific MACs. As such, only those computer hosts/nodes that are in the network segment (i.e., have been assigned the same pre-shared key for generating and decoding the MAC signed data packets) are capable or reading the segment's network traffic. By implementing segment-specific MAC signed data packets, the present invention allows for confidential data transmission absent the need to encrypt the actual contents/data being transmitted.

Embodiments include processing commands on multiprocessor chip having a plurality of nodes that are interconnected via a clockwise ring network and a counterclockwise ring network. Aspects include receiving a command for execution and based at least in part on a determination that the clockwise ring network and the counterclockwise ring network are both available for transmission, performing a bidirectional execution of the command. The bidirectional execution includes transmitting a first warning signal on the clockwise ring network and a second warning signal on the counterclockwise ring network, transmitting the command on the clockwise ring network a first number of clock cycles after the first warning signal, and transmitting the command on the counterclockwise ring network a second number of clock cycles after the second warning signal.

A ring interconnect system comprises a plurality of nodes. Each node is connected to two other nodes to form a ring interconnect. Every pair of nodes is connected by an inter-node path for that pair of nodes distinct from the ring interconnect. Each of the nodes comprises a message buffer to buffer messages received from at least one device associated with the node. Each of the nodes also comprises activity level circuitry to transmit an activity indication, when a number of the messages in the message buffer is equal to or above a threshold, to each other node of the plurality of nodes via the respective inter-node paths. Each of the nodes also comprises arbitrator circuitry to receive the activity indications from each other node and from the activity level circuitry, and to allow ingress of a message from the message buffer onto the ring interconnect in dependence on the activity indications. Also provided is a method of operating a node of a ring interconnect system.

In accordance with embodiments disclosed herein, there are provided methods, systems, mechanisms, techniques, and apparatuses for traffic aggregation on multiple Wide Area Network (WAN) backhauls and multiple distinct Local Area Network (LAN) networks; for traffic load balancing on multiple WAN backhauls and multiple distinct LAN networks; and for performing self-healing operations utilizing multiple WAN backhauls serving multiple distinct LAN networks. For example, in one embodiment, a first Local Area Network LAN access device is to establish a first LAN; a second LAN access device is to establish a second LAN; a first Wide Area Network WAN backhaul connection is to provide the first LAN access device with WAN connectivity; a second WAN backhaul connection to provide the second LAN access device with WAN connectivity; a management device is communicatively interfaced with each of the first LAN access device, the second LAN access device, the first WAN backhaul connection, and the second WAN backhaul connection; and the management device routes a first portion of traffic originating from the first LAN over the first WAN backhaul connection and routes a second portion of the traffic originating from the first LAN over the second WAN backhaul connection.

At this time, a communication line load transmission interval deciding unit selects a transmission interval from the load of the bus. An instrument load transmission interval deciding unit selects a transmission interval from the processing loads of at least one of the vehicle on-board instrument and the gateway. A delivery control unit compares the transmission interval selected by the communication line load transmission interval deciding unit with the transmission interval selected by the instrument load transmission interval deciding unit, and performs control so that the divided updating data is delivered at transmission intervals which are equal to or greater than the longer of these transmission intervals.

In one embodiment, an apparatus includes n electrical communication channels, m optical communication media interfaces, and a plurality of muxes. The plurality of muxes are configured to receive an information stream. The information stream is carried over the n electrical communication channels and the m optical communication media interfaces. The plurality of muxes are further configured to transform the information stream from v virtual lanes. Each virtual lane includes a plurality of data blocks from the information stream and an alignment block, wherein v is a positive integer multiple of the least common multiple of m and n, v is greater than n, and n is equal to m.

Methods and apparatus are disclosed for processing local area network (LAN) diagnostic data obtained in respect of a LAN, the LAN having at least one user-device located therein operable to communicate via a LAN gateway device with one or more remote devices in a communications network outside the LAN, the LAN gateway device having a wireless interface associated therewith in the LAN, the LAN diagnostic data including data packets received via the wireless interface at least some of which carry performance data relating to one or more predetermined performance characteristics of the LAN.

The present invention relates to an avionic communication system that comprises a plurality of switches and a plurality of equipment units. Each equipment unit is capable of generating digital data that are present in the form of a plurality of frames of the first type that are in compliance with a first protocol, or of the second type that are in compliance with a second protocol. Each switch and each receiving equipment unit are configured so as to determine the type of each frame received and, as a function of the determined type, to process this frame in accordance with the corresponding protocol, each frame of the first type being processed on a prioritised basis in relation to each frame of the second type. The first protocol is of the type ARINC 664 P7 and the second protocol is of the type Ethernet with predetermined routing.

The present invention relates to an end system comprising at least one input port adapted to receive frames, and a configuration table comprising, for each identification value, a received frame of parameters for processing that frame.

The end system is adapted to determine a processing protocol between an ARINC 664 P7 type protocol and an IEEE 802 type protocol of each frame received via the input port exclusively from the processing parameters corresponding to the identification value of that frame in the configuration table, independently of the type of this frame.