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7623445 Multiple ring support within a single network element  
A network element receives frames from multiple ring networks. Each ring network linked to the network element is supported by a designated support program. The received frames are monitored for...
7620861 Method and apparatus for testing integrated circuits by employing test vector patterns that satisfy passband requirements imposed by communication channels  
Embodiments of an apparatus and method for high-speed testing of a device under test are described herein, where the device under test is coupled to a tester via a limited passband communication...
7619967 Method for protection of ethernet traffic in optical ring networks  
A method for protecting Ethernet data packets transmitted over SDH/SONET traffic in a ring-like optical network formed by a number of nodes, the method includes utilizing MS-SPRING/BLSR system for...
7613108 Redundant supervisory control system, and redundancy switching method of the same  
An object is to provide a redundant supervisory control system and a redundancy switching method thereof. In the redundant supervisory control system, remote I/O apparatuses are less likely to be...
7606144 Ring-connected surveillance system with real-time backup monitoring  
A real-time ring-loop surveillance network system is provided. By using digital communication network, multiple channels of media data and control data are transmitted in a ring-loop. The media...
7602706 Inter-ring protection for shared packet rings  
A method for providing inter-ring protection in shared packet rings includes identifying an active node which is connected to a ring interconnect node on the same ring as the active node and...
7586843 Communication network having wireless access to a service center  
A communication network has an open-ended communication loop coupled to a communication ring at separate points on the ring. The communication network has wireless access points that are coupled to...
7570600 Overlay network with efficient routing and recovery  
A network having a plurality of nodes interconnected by links (virtual communication channels) is disclosed. In one embodiment, the nodes may communicate with each other in a decentralized or...
7545735 Scalable protection mechanism for hierarchical multicast service in ring based networks  
A novel fast and scalable protection mechanism for protecting hierarchical multicast service in ring based networks. The mechanism of the present invention is especially suitable for use in...
7522662 Electronic device including image forming apparatus  
When a plurality of sub-processors are daisy chained in a loop, for example, to a main processor by a one-way bus, a command packet from the main processor addressed to itself is transmitted to the...
7522532 Layer 2/layer 3 interworking via physical loopback  
A layer three enabled layer two network includes a multi service platform. The platform includes a layer two switching component and a layer three switching component and has a physical loopback...
7519293 Optical communication system having ring-based restoration using shared protect links  
In an optical communication system, optical communications are transferred over a first ring and a second ring. A fault is detected on the first ring or the second ring. If the fault is detected on...
7518988 Ring switchover method  
A fast ring switchover is enabled in packet level processing at the time of ring configuration, and as a result, a system switchover function can be implemented in an Ethernet switch or the like by...
7518982 System and method of communicating status and protection information between cards in a communications system  
Described are a system and method of communicating status and protection information between cards in a communications system. The system has a plurality of cards connected to a backplane. The...
7515530 Detecting loops between network devices by monitoring MAC moves  
A technique for detecting a loop between network devices such as customer and carrier edge devices involves counting the number of media access control (MAC) address moves that occur at a device...
7512147 Method of reserving network bandwidth resources, and communications system and network device using the same  
A communications system whose bandwidth resources can be used more efficiently by reserving them on an individual path basis. Upon receipt of a bandwidth reservation message, a path setup initiator...
7512140 Inter-ring connection method and device  
In an inter-ring connection method and device interconnecting a plurality of RPR rings, an inter-ring connecting device (interconnecting station) determines whether or not an RPR frame received...
7496030 Managing loops between network devices by monitoring MAC moves  
A technique for managing loops between network devices such as customer and carrier edge devices involves monitoring the MAC moves that occur at a device to detect the existence of a loop and...
7493524 Network with redundancy properties, a branching unit for a user device in a network, redundancy manager for a network with redundancy properties and method for operating a network with redundancy properties  
The invention relates to a network, in particular a PA PROFIBUS network having redundant properties and a linear topology. Two line ends are connected to a redundancy manager which disconnects said...
7486613 Protection-switching apparatus and method in asynchronous transfer mode system with ring topology  
The present invention discloses a protection-switching apparatus and method in an asynchronous transfer mode (ATM) system with ring topology. In the invention, the ONU detects a trouble, or...
7483398 Method and system for detecting ring link provisioning mismatch  
A method for automatically detecting bi-directional link switched ring link provisioning errors. The method includes receiving an opaque link state advertisement containing bi-directional link...
7477847 Optical and electrical channel feedback in optical transceiver module  
Optical transceivers have loopback and pass-through paths for diagnosing transceiver components and optical networks connected to the optical transceiver or for routing data out of the transceiver...
7471624 Loop connection detecting method and device  
In an access portion of a LAN, traffic of a received packet is detected, whether or not the traffic exceeds a predetermined threshold is determined, packet information specific to the received...
7466688 Routing and design in K-shared network  
Techniques for network routing and design are provided. A technique for determining a route for a demand in a network, wherein the network comprises primary paths and secondary paths, and at least...
7466647 Efficient muxing scheme to allow for bypass and array access  
A method and apparatus for using a 2:1 MUX to control read access, data bypass, and page size bypass in a memory array. The mechanism of the present invention reduces the 3:1 MUX normally required...
7463580 Resource sharing among network tunnels  
A method for communication includes defining a resource-sharing group including two or more communication paths that traverse at least two different routes through a communication network, the...
7460471 System for motion control, method of using the system for motion control, and computer readable instructions for use with the system for motion control  
A motion control system and method that includes a central controller configured to generate first and second demand control signals to be used to define actuation motion of respective first and...
7454218 Method of band multiplexing to improve system capacity for a multi-band communication system  
A control method of synchronizing communications between or among a plurality of devices in a communication system includes detecting beacons from the plurality of devices in the communication...
7450493 System and method of forwarding K-bytes between optical cards in a communications system  
Described are a system and method for forwarding K-bytes between optical cards in a communication system. The system includes a first card and second card each connected to a backplane. The second...
7443788 Method and apparatus for improving performance of a loop network  
A method and apparatus for improving performance of a loop network, in particular a Fiber Channel Arbitrated Loop. The loop network has two loops and a plurality of dual-ported devices each with...
7440397 Protection that automatic and speedily restore of Ethernet ring network  
A data relay apparatus stores identification information for identifying itself. A blocking unit blocks a port to avoid an occurrence of a loop path if the data relay apparatus is a master node,...
7440396 Determining the position of a bad link  
A system for determining a bad link in a ring includes a start-up controller that transmits a link command having a position field holding initial value. Each device in the ring increments the...
7434106 Reference clock failure detection on serial interfaces  
The present invention is a system and method for determining clock rate failure in a serial communication interface. A complete clock rate failure can be detected. Alternatively, or in addition,...
7430166 Provisioning Ethernet dual working mode  
A method and system provides the capability to provision Dual Working mode service in a SONET network, while maintaining compatibility with existing SONET provisioning systems. In one embodiment of...
7426179 Method and apparatus for signaling path restoration information in a mesh network  
A method and apparatus are disclosed for monitoring and signaling a path restoration using pre-computed restoration paths following a detected fault on a primary service path in a communications...
7421203 Method for transmitting packet in wireless access network based on wavelength identification code scheme  
A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network...
7420986 Method and apparatus for the detection and classification of collisions on a shared RF network  
The present invention is directed toward a method and apparatus for detecting collisions on a shared access network. In accordance with the present invention, two or more RF modulated signals...
7418203 Diagnosis method for standby system of optical ring network  
An object of the invention is to provide a diagnosis method for standby systems in an optical ring network having a redundant configuration, which can confirm normal states of standby systems in...
7400574 Method and apparatus for managing a loop network  
A method and apparatus for managing a loop network, the loop network ( 200 ) including at least one loop ( 206, 208 ), a plurality of devices ( 210 ) connected to the at least one loop ( 206, 208 )...
7397760 Transmission apparatus  
A transmission apparatus including: a plurality of asynchronous network interface units each having an asynchronous network termination unit for inputting/outputting a packet from/to an...
7388830 Automatic side selection in double-ring topologies  
Connecting a new node to a double ring network or establishing a new network having a double ring network is greatly simplified by automatic mapping of logical interfaces to physical interfaces to...
7388828 Method for rerouting MPLS traffic in ring networks  
A method is described for fast rerouting, in case of a fault, packets of MPLS traffic in a ring-like network configuration, where the MPLS traffic is formed by one or more Label Switched Paths...
7385919 Local network, particularly Ethernet network having redundancy properties, and coupling device for such a network  
A local network, particularly an Ethernet network having redundancy properties, in which coupling devices (K 1 , K 2 , K 3 ) and a redundancy manager (RM) are interconnected in a ring-shaped...
7385918 Packet protection method and transmission device in ring network, and program therefor  
Two transmission devices connected to a link in which a failure occurs turn back a ring. Other transmission device changes a transmission ring of an NNI packet which is a UNI packet whose...
7372805 Traffic grooming methods for undersea trunk and branch architectures  
In a network architecture, selective grooming is performed. In selective grooming, a low traffic node is coupled (a) directly to an other low traffic node via a high capacity trunk, and (b) to a...
7369769 Ethernet passive optical network ring and its method of authorization and collision detection  
An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical...
7363362 Method and apparatus for automatically establishing bi-directional line-switched rings in telecommunication networks  
A method of automatically provisioning a network-wide function using a plurality of network elements in a service provider network and using a sub-network level approach is provided. In one...
7362699 Data distribution network and method for managing a breakdown in said network  
A device for distributing information and its fault management process which improves the robustness of a network, such as in an aircraft, a boat, or a train. The device or process includes one or...
7349329 Network system, data transmitter-receiver and failure location/compensation method  
A data transmitter-receiver 30 arranged on a ring network to form a node includes a normal-direction data transmit/receive unit 19 , a reverse-direction data transmit/receive unit 20 , a buffer...
7345993 Communication network with a ring topology  
Connections between communication nodes are established along a ring, with nodes at successive positions along the ring and two-way point to point communication connections between pairs of the...
Matches 1 - 50 out of 306 1 2 3 4 5 6 7 >