2033results about "Star/tree networks" patented technology

Multicast routing in ad-hoc networks by exchange of multicast group update information and routing tree information among neighboring routers is disclosed. A router propagates multicast group update information based on the update information and the routing tree information. A router also determines whether to forward multicast data packets based on control information in the multicast data packets and the routing tree information.

A method of filtering data packets in a network device is disclosed. An incoming packet is received from a port and the incoming packet is inspected and packet fields are extracted. The incoming packet is classified based on the extracted packet fields and action instructions are generated. The incoming packet is then modified based on the action instructions. Further, the inspection and extraction includes applying inspection mask windows to any portion of the incoming packet to extract programmable packet fields.

A system for providing power over data lines, particularly Ethernet data lines, comprises a network switch including a multiplicity of ports each of which is capable of supplying power in addition to data packets, a controllable power source which is coupled to said ports for supplying power thereto and a processor which is coupled to control the supply of power by the power source. The processor is programmed to guarantee the supply of power to selected ports and to allow or inhibit the supply of power to ports other than the selected ports, having regard to a specified limit on the supply of power by the controllable power source and the total guaranteed power to the selected ports.

A method of storing collected data on a wireless device. User interaction with a wireless device and/or the performance of the wireless device is monitored and data related thereto collected. The collected data may be structured into a tagged hierarchical structure comprising a plurality of events that are separate and independent from one another. Each event may describe a specific application with a plurality of attributes. The tagged hierarchical structure formed as a tree structure is translated into a syntax generic language. The result may be formed into a compact format using a zipped format and/or a binary-equivalent format and then stored and transmitted to a central location (e.g., a server) for statistical analysis processing. The server transforms the received data into expanded format and forms a hierarchical tree structure for each event and its attributes. The result is processed for producing a statistical analysis of the collected data.

A mobile backhaul inter-mesh communication point forms an interface between a wireless mesh network on a first level and a wireless mesh network on a second, higher bandwidth, level. The two wireless networks are differentiated, e.g., by causing the mesh networks to be formed using different spectra, protocols or coding, or antennae. The mobile intra-mesh communication point functions as an access point in the lower level mesh network and as a relay point in the upper level mesh network. Utilizing mobile inter-mesh communication points facilitates deployment of wireless network access points while enabling the location of access points to follow the concentration of network users. Mobile inter-mesh communication points may be deployed in personal vehicles such as cars, trucks, and motorcycles, public transportation vehicles such as busses, trains, and aircraft, emergency vehicles such as fire trucks and ambulances, and many other types of vehicles.

A network element is configured to provide a distributed data center architecture between at least two data center locations. The network element includes a plurality of ports configured to switch packets between one another; wherein a first port of the plurality of ports is connected to an intra-data center network of a first data center location and a second port of the plurality of ports is connected to a second data center location that is remote from the first data center location over a Wide Area Network (WAN), and wherein the intra-data center network of the first data center location, the WAN, and an intra-data center network of the second data center location utilize an ordered label structure between one another to form the distributed data center architecture.

A supervisor entity comprises an entity status module for maintaining status of its subordinate entities and updating the supervisor entity with status updates for itself and the subordinate entities. The entity status module comprises an entity status controller for receiving a status message from a first subordinate entity, a subordinate determination module for determining a second subordinate entity that is subordinate to the first subordinate entity, a status update module for updating the status of the second subordinate entity based on the received status message from the first subordinate entity, a status reporting module for reporting the updated status of the second subordinate entity to a supervisor entity and a status storage for storing the status of the second subordinate entity.

The invention refers to one of a number of nodes of a communication system. The nodes are connected to a communication media for transmitting data among the nodes. Said one node comprises a communication controller, across which the node is connected to the communication media, and a bus guardian for controlling access of the communication controller to the communication media. In order to provide a cheap but nevertheless reliable way for monitoring the synchronized clock signal of a node of a communication system and in particular for detecting deviations of the synchronized clock signal it is suggested that a synchronized clock signal from the communication controller is made available to the bus guardian, and that the bus guardian comprises means for monitoring the synchronized clock signal using a bus guardian internal clock signal, which is generated by means of an electronic circuit and which is less accurate than the synchronized clock signal to be monitored.

A switching hub is provided with a control unit for setting, for a port, a VLAN-ID comprising a subgroup ID of a subgroup constituting a VLAN, and a sub-ID of a group contained in the subgroup ID, and a switching processing unit for relaying a frame, which contains the VLAN-ID, via the port, which matches the VLAN-ID

A point-to-multipoint passive optical network transmits downstream data from an optical line terminal (OLT) to multiple optical network units (ONUs) in variable-length packets and upstream data from the ONUs to the OLT in variable-length packets utilizing time division multiplexing to avoid transmission collisions. In an embodiment, the variable-length downstream packets and the variable-length upstream packets are formatted according to IEEE 802.3. In an embodiment, the length of the variable-length downstream and upstream packets is related to the length of Internet protocol (IP) datagrams carried within the packets.

An Fibre Channel Switch which enables end devices in different Fabrics to communicate with one another while retaining their unique Fibre Channel Domain_IDs. The Switch is coupled to a first fabric having a first set of end devices and a second fabric having a second set of end devices. The Switch is configured to enable communication by the first set of end devices associated with the first fabric with the second set of end devices associated with the second set of end devices using the unique Domain_IDs of each of the first set and the second set of end devices. In one embodiment of the invention, the first and second fabrics are first and second Virtual Storage Array Networks (VSANs) respectively. In an alternative embodiment, the first fabric and the second fabric are separate physical fabrics.

A method, apparatus, and computer program device enabling a computer network switching device to inform an attached requesting device of switch ports affected by configuration changes during the period of time since the last query by the particular requesting device. The switch device is initialized with a change index and data vector, the latter indicative of an initial port configuration. The switch increments the index in response to subsequent port configuration change events, and stores in association with the incremented index a data vector indicating the ports changed during the corresponding event. The switch stores an array of associated index and vector values. The switch responds to a query from an attached requesting device by informing the requesting device of specific ports affected by one or more configuration changes since the index value held by the requesting device was the current index value in the switch.

A method for preventing a control packet loop in a network realizing node redundancy or circuit redundancy based on a rapid spanning tree protocol or a multiple spanning tree protocol is disclosed. The method includes the steps of: detecting a loop of a control packet of the rapid spanning tree protocol or the multiple spanning tree protocol; and discarding the control packet by which the loop is detected so as to prevent occurrence of the loop of the control packet.