摘要:
Methodologies for determining one or more staged topologies for a communication network, communication networks implementing one or more staged topologies, and systems for determining one or more staged topologies for a communication network are provided. In one embodiment, a method of determining a staged topology for a wireless communication network including a plurality of nodes, wherein the nodes are capable of transmitting and receiving signals on a plurality of frequencies, includes identifying a plurality of topologies comprising different subsets of available communication links among the nodes, associating a connection matrix with each identified topology, establishing one or more sequences of topologies using the identified topologies, multiplying the connection matrices associated with the topologies in each sequence of topologies to obtain a sequenced connection matrix corresponding with each sequence of topologies, multiplying each sequenced connection matrix by a weighting matrix to obtain a total cost matrix corresponding with each sequence of topologies, selecting one of the sequences of topologies as the staged topology based on the total cost matrices corresponding with each sequence of topologies, and assigning each topology included in the sequence of topologies selected as the staged topology to one of the frequencies, wherein at least two of the topologies are assigned different frequencies allowing concurrent in time stages.
摘要:
A system and/or method for relaying messages in a network (e.g. a mobile network) are provided. Certain portable communications nodes are instrumented with omni-directional antennas. Certain static communications nodes are network cluster-head nodes with directional antennas, and, for example, achieve much of the gain possible when all nodes have directional antennas. Cluster-head communications preferably are used when the nodes are separable by the directional antennas. Preferably, there is a transition to mesh communications when the nodes cannot take advantage of the directional antennas. One feature of certain exemplary embodiments is that only one side of a communication link requires a directional antennal to enable spatial frequency reuse.
摘要:
Methodologies for determining one or more staged topologies for a communication network, communication networks implementing one or more staged topologies, and systems for determining one or more staged topologies for a communication network are provided. In one embodiment, a method of determining a staged topology for a wireless communication network including a plurality of nodes, wherein the nodes are capable of transmitting and receiving signals on a plurality of frequencies, includes identifying a plurality of topologies comprising different subsets of available communication links among the nodes, associating a connection matrix with each identified topology, establishing one or more sequences of topologies using the identified topologies, multiplying the connection matrices associated with the topologies in each sequence of topologies to obtain a sequenced connection matrix corresponding with each sequence of topologies, multiplying each sequenced connection matrix by a weighting matrix to obtain a total cost matrix corresponding with each sequence of topologies, selecting one of the sequences of topologies as the staged topology based on the total cost matrices corresponding with each sequence of topologies, and assigning each topology included in the sequence of topologies selected as the staged topology to one of the frequencies, wherein at least two of the topologies are assigned different frequencies allowing concurrent in time stages.
摘要:
A system and method for electrical charging is disclosed. The electrical charging system comprises a first charging coil and an energy storage device coupled to the first charging coil. The energy charging system further comprises an energy charging station comprising a second charging coil disposed on a movable positioner, wherein the second charging coil is coupleable to an electrical energy source, at least one drive mechanism configured to translate the movable positioned, and a system controller. The system controller is configured to detect an event indicative of a proximity of the first charging coil to the energy charging station, translate the movable positioner such that the second charging coil is substantially aligned with, and closely spaced apart from, the first charging coil to form an electrical transformer, and initiate a charging cycle configured to transfer electrical energy to the at least one energy storage device via the electrical transformer.
摘要:
A spread spectrum protocol in a power line communication (PLC) system uses Harmonic Modulation (HM) as true spread spectrum modulation made up of a plurality of modulated tones spaced in frequency with equal distance between adjacent tones. The protocol incorporates the following modes:"Conventional"--Master/Slave relation of meters to a common hub."Leap Frog"--performing data relay through locally elected/designated meters for relay to a central hub or a distributed set of concentrators."Alarm Channel"--reserving an HM signal set for meters to telemeter their configuration in a subnetwork after a power distribution network reconfiguration."Probing"--using HM polling to diagnose the location of a feeder fault."Derived Timing"--master derived timing for inbound message framing."Rate Adapting"--allocating a mix of number of HM channels to the outbound/inbound ratio according to message traffic control requirements and power line distribution topology."Priority/Noise Based Adapting"--allocating a different mix of number of HM channels to the outbound/inbound ratio based on message priority or noise conditions.
摘要:
System, device and methods that provide proximate environmental and security intelligence to a guard making a security tour or round in an installation, as well as that provide for certifying that the guard has visited designated and known checkpoints on or about the times at which the guard is expected at those checkpoints.
摘要:
A method of prioritizing messages on a Local Area Network comprises receiving a digitized incoming message, comparing a message signature of the incoming message with a stored priority message signature, passing non-priority messages to a standard Ethernet protocol stack for processing, storing priority messages temporarily, preventing priority messages from being processed in the standard Ethernet protocol stack, and handling priority messages using a simplified protocol stack designed to process a specific data packet type. This method may be performed by an Application Specific Integrated Circuit (ASIC) inserted between an Ethernet PHY layer and Ethernet MAC layer on a Network Interface Card of a host device. In particular, automated machinery control systems using the Ethernet protocol for networking are intended to benefit from the prioritizing method and implementation.
摘要:
System, device and methods that provide proximate environmental and security intelligence to a guard making a security tour or round in an installation, as well as that provide for certifying that the guard has visited designated and known checkpoints on or about the times at which the guard is expected at those checkpoints.
摘要:
A technique is provided for providing information to a customer within a store. A mobile phone is provided that is adapted to communicate with Near Field Communication (NFC) devices and wireless Internet Protocol (IP) based network, or Internet system, as well as operate as a cellular phone. The mobile phone is configured to bridge information between the various protocols used to enable the mobile phone to communicate with an NFC device, a wireless Internet system, and a cellular phone system. For example, information obtained by the mobile phone from a NFC device may be transferred to the portion of the mobile phone that is used to connect the mobile phone to a wireless Internet system to enable the mobile phone to provide the proper authentication to access the wireless Internet system. In addition, the mobile phone may be adapted to communicate using a Bluetooth communication system. Similarly, information from the Bluetooth portion of the mobile phone is shared with the other portions of the phone that communicate using other data protocols.
摘要:
A method and system for routing traffic in a communication network is disclosed that may include assigning each node in a network a first subset of route repository nodes and a second subset of route repository nodes, querying the second subset of route repository nodes in order to obtain route information that is stored in the second subset of route repository nodes, computing route information by applying a route computation algorithm to the first subset of route repository nodes, and routing traffic in the communication network based on the route information obtained from the second subset of route repository nodes and the route information computed using the first subset of route repository nodes.