Abstract: An information providing system (SYS), which provides information with a vehicle to assist driving the vehicle via a road-to-vehicle communication, comprises an information providing center (R) which has version-controlled first static information (R20) and transmits service information including version information of matching static information, the service information being generated by using the first static information (R20); and an on-vehicle device (V) which has version-controlled second static information (V20) corresponding to the first static information (R20), implements a drive assist service by using the second static information (V20) and service information received from the information providing center (R), and determines content of the drive assist service to be implemented, based on version information included in the service information and version information of the second static information (V20).

Abstract: Multicast transmission in an optical network includes receiving a primary token at a root node of the optical network authorizing the point-to-multipoint data transmission from the root node to a plurality of branch nodes of the optical network. It is determined whether the root node comprises a virtual output queue associated specifically with the branch nodes included on the point-to-multipoint transmission. The virtual output queue is created that is associated specifically with the branch nodes included in the point-to-multipoint transmission if it is determined the root node does not comprise such a queue. The data is placed in the virtual output queue for transmission to the branch nodes.

Abstract: An information providing system (SYS), which provides information with a vehicle to assist driving the vehicle via a road-to-vehicle communication, comprises an information providing center (R) which has version-controlled first static information (R20) and transmits service information including version information of matching static information, the service information being generated by using the first static information (R20); and an on-vehicle device (V) which has version-controlled second static information (V20) corresponding to the first static information (R20), implements a drive assist service by using the second static information (V20) and service information received from the information providing center (R), and determines content of the drive assist service to be implemented, based on version information included in the service information and version information of the second static information (V20).

Abstract: A network includes multiple nodes interconnected to form a ring topology. These nodes support data transmissions over the network using tokens. To send and receive data over the network, nodes may process control messages. A node can receive a token authorizing transmission on one of multiple data channels, determine a transmission allocation, which represents an amount of time that the authorized data channel may be utilized to transmit data, and determine a destination allocation, which represents a proportion of the transmission allocation that may be utilized to transmit the data to a particular destination. The node can also transmit the data on the authorized data channel in accordance with the transmission allocation and the destination allocation.

Abstract: An optical node for optical burst transport includes optical components operable to transmit and receive optical signals over an optical transmission medium. The optical components include a demultiplexer that is operable to receive a wavelength division multiplexed (WDM) optical signal at an input port and to separate the WDM optical signal into two or more constituent wavelength signals, and a switching matrix that includes one or more electro-optic switches. Each electro-optic switch is operable to receive a wavelength signal and switch the signal to one of two outputs, and the outputs include an output port of the optical node and one or more drop output ports of the optical node.

Abstract: A network provides fault tolerant network routing by identifying root nodes that provide cover against a particular type of fault. Nodes then route copies of packets through these root nodes such that an occurrence of the particular type of fault will not disrupt delivery of the packets.

Abstract: A method for assigning channels in a wireless network includes receiving from each of a plurality of a first type of wireless components a total average data rate. Each total average data rate is based on an average data rate for each of a first plurality of a second type of wireless components coupled to the respective first type of wireless component. The method also includes determining at least one channel parameter for a first wireless component of the plurality of the first type of wireless components based on a ratio of the total average data rate associated with the respective first wireless component to the total average data rate associated with the plurality of the first type of wireless components. The method further includes allocating a channel to the first wireless component based on the determined at least one channel parameter.

Abstract: A network includes multiple nodes interconnected to form a ring topology. These nodes support data transmissions over the network using tokens. To send and receive data over the network, nodes may process control messages. A node can receive a token authorizing transmission on one of multiple data channels, generate a transmission control message identifying a destination node and the authorized data channel, and communicate the transmission control message for receipt by the destination node. The node can also transmit data on the authorized data channel after communicating the transmission control message and communicate the token to a next node.

Abstract: A network includes multiple nodes interconnected to form a ring topology. These nodes support data transmissions over the network using tokens. To send and receive data over the network, nodes may process control messages. A node can receive a first token authorizing transmission on one of multiple data channels, generate a transmission control message identifying a destination node and the authorized data channel, and communicate the transmission control message to a next node. The node can also communicate a second token to the next node authorizing secondary transmissions on the authorized data channel, transmit data on the authorized data channel after communicating the transmission control message, and communicate the first token to the next node after communicating the second token to the next node.

Abstract: In one embodiment, an apparatus includes a passive element including one or more first waveguides and one or more second waveguides. The apparatus also includes an active element integrated into the passive element. The active element includes one or more third waveguides that actively guide light from the first waveguides to the second waveguides. The third waveguides include polarization-independent electro-optical (EO) thin film.

Abstract: Network traffic may be estimated using samples of network activities to identify traffic parameters. A model of the network may be generated using the traffic parameters, and the model can be used to simulate the network using a modified set of parameters. Network traffic may be managed using the results of the simulation. Network traffic can also be managed by intercepting and modifying a control message on a peer-to-peer network.

Abstract: An optical node for optical burst transport includes optical components operable to transmit and receive optical signals over an optical transmission medium. The optical components include a demultiplexer that is operable to receive a wavelength division multiplexed (WDM) optical signal at an input port and to separate the WDM optical signal into two or more constituent wavelength signals, and a switching matrix that includes one or more electro-optic switches. Each electro-optic switch is operable to receive a wavelength signal and switch the signal to one of two outputs, and the outputs include an output port of the optical node and one or more drop output ports of the optical node.

Abstract: A predictive scheduling technique in a communication network having a plurality of nodes, the network utilizing tokens to authorize data burst transmissions between the plurality of nodes, includes receiving a control message from a first node at a second node, wherein the control message comprises information regarding a data burst transmission from the first node to the second node. The information in the control message is determined, and a position of the second node with respect to the first node is determined. A prediction algorithm is implemented to predict a token arrival time at the second node from the first node using the information in the control message and the position of the second node with respect to the first node.

Abstract: Multicast transmission in an optical network includes receiving a primary token at a root node of the optical network authorizing the point-to-multipoint data transmission from the root node to a plurality of branch nodes of the optical network. It is determined whether the root node comprises a virtual output queue associated specifically with the branch nodes included on the point-to-multipoint transmission. The virtual output queue is created that is associated specifically with the branch nodes included in the point-to-multipoint transmission if it is determined the root node does not comprise such a queue. The data is placed in the virtual output queue for transmission to the branch nodes.

Abstract: In one embodiment, an apparatus includes a passive element including one or more first waveguides and one or more second waveguides. The apparatus also includes an active element integrated into the passive element. The active element includes one or more third waveguides that actively guide light from the first waveguides to the second waveguides. The third waveguides include polarization-independent electro-optical (EO) thin film.

Abstract: A method for assigning channels in a wireless network includes receiving from each of a plurality of a first type of wireless components a total average data rate. Each total average data rate is based on an average data rate for each of a first plurality of a second type of wireless components coupled to the respective first type of wireless component. The method also includes determining at least one channel parameter for a first wireless component of the plurality of the first type of wireless components based on a ratio of the total average data rate associated with the respective first wireless component to the total average data rate associated with the plurality of the first type of wireless components. The method further includes allocating a channel to the first wireless component based on the determined at least one channel parameter.

Abstract: Detecting anomalies includes receiving acceptable traffic from a network associated with a network party. The acceptable traffic is received at an anomaly detector associated with a monitoring party, where the anomaly detector is external to the network. The acceptable traffic is affected by an influencing interaction with anomalous traffic having anomalies. The influencing interaction yields an effect on the acceptable traffic, where the effect indicates the presence of the anomalies. Features of the acceptable traffic are monitored, where a monitored feature is operable to detect the effect. The anomalies are detected in response to the monitoring.

Abstract: Detecting anomalies includes receiving acceptable traffic affected by an influencing interaction with anomalous traffic having anomalies. The influencing interaction yields an effect on the acceptable traffic, where the effect indicates the presence of the anomalies. Features of the acceptable traffic are monitored, where a monitored feature is operable to detect the effect. The anomalies are detected in response to the monitoring.