89results about How to "Efficient forwarding" patented technology

This invention is directed to a parallel, control-information generation, distribution and processing system. This scalable, pipelined control and switching system efficiently and fairly manages a plurality of incoming data streams, and applies class and quality of service requirements. The present invention also uses scalable MLML switch fabrics to control a data packet switch, including a request-processing switch used to control the data-packet switch. Also included is a request processor for each output port, which manages and approves all data flow to that output port, and an answer switch which transmits answer packets from request processors back to requesting input ports.

A method and apparatus for building a packet grooming and aggregation engine is disclosed. The grooming and aggregation engine can be applied to the network for providing flexible aggregation and service multiplexing functions. A method and apparatus achieves the intended function that is easy to implement and easy for the network operator to manage, yet provides enough flexibility to mix and match various services at the edge node of the network. One specific embodiment of the patent is an Ethernet over SONET mapping system where user traffic is aggregated and groomed into SONET transport virtual concatenation channels.

The present invention intends to provide a polishing pad and a multi-layer polishing pad that can particularly effectively suppress scratch from occurring. The polishing pad of the invention comprises at least one part selected from a groove (a) having at least one kind of shape selected from annular, lattice-like and spiral form on a polishing surface side, a concave portion (b) and a through hole (c). In the above, surface roughness of an inner surface of the part is 20 mum or less and the polishing pad is used for chemical mechanical polishing.

For each high-level protocol, a respective mesh of Transmission Control Protocol (TCP) connections is set up for a cluster of server computers for the forwarding of client requests. Each mesh has a respective pair of TCP connections in opposite directions between each pair of server computers in the cluster. The high-level protocols, for example, include the Network File System (NFS) protocol, and the Common Internet File System (CIFS) protocol. Each mesh can be shared among multiple clients because there is no need for maintenance of separate TCP connection state for each client. The server computers may use Remote Procedure Call (RPC) semantics for the forwarding of the client requests, and prior to the forwarding of a client request, a new unique transaction ID can substituted for an original transaction ID in the client request so that forwarded requests have unique transaction IDs.

There is disclosed a manner of managing the active topology, that is the scheme for forwarding data, in a computer network such as an Ethernet local area network. A root bridge is selected from a plurality of bridges in the network; the root bridge calculating at least one spanning tree from a topology database that has been populated by bridge neighbor information gleaned from link state advertising messages. The root bridge may also calculate an alternate topology for implementation in the event a failure condition that affects the primary spanning tree is detected. The root bridge then advertises the spanning tree and remotely configures the port states of the bridges in the spanning tree through tree advertising messages that the bridges are arranged to process and set their ports accordingly.

An intermediate network node is configured to forward a plurality of packets concurrently, e.g., as a vector, rather than one packet at a time. As such, the node can load a single sequence of forwarding instructions that may be repeatedly executed for packets in the vector. In addition, the intermediate network node adaptively controls the rate at which it processes data packets through a directed forwarding graph. To that end, the intermediate node is configured to dynamically select the number of packets per vector, i.e., vector size, processed at each node of the forwarding graph. Further, the intermediate node also may be configured to dynamically select timing intervals for one or more “node timers” used to control the rate at which packets traverse through the graph. Illustratively, the vector size and node-timer intervals are selected so that the average latency through the forwarding graph is less than a predetermined target latency, e.g., 50 microseconds (μs).

The invention relates to a named data network comprehensive routing method based on position information and content pushing, and belongs to the technical field of computer network routing optimization. The method comprises: arranging a network management server, determining the link state of each node and starting a link state timer; establishing an NDN whole network topological structure chart and starting a network topological timer; establishing a network topology application record table; establishing a matching list of the whole network data name and the content source name and startinga statistical interval timer; the user sending a position request interest packet and the network management server replying the position data packet; a user calculating a forwarding path and sendinga data request interest packet and a content source reply content data packet, a network management server evaluating data popularity and a content source pushing data name to supplement an FIB tableof an NDN node, and regularly detecting a link state to update a network topology and pushing a high popularity data name. The method is relatively low in complexity and relatively low in bandwidth overhead, and can realize rapid establishment of the FIB table and efficient forwarding of the interest packet.

There is disclosed a method and apparatus for facilitating a network, such as an Ethernet LAN, for efficient forwarding of data traffic by collecting neighbor information, generating and distributing link state advertisements, populating a topology database for the network, and calculating trees for each bridge serving as a root bridge. In a preferred embodiment the method and system also prepare one or more backup topologies, and store them for use if they are needed due to a failure condition detected in the network. In a particularly preferred embodiment, probabilities are assigned to various potential failure conditions, and the probability values are used to decide which backup topologies to calculate, store, or use.

The invention provides a network traffic refined screening device and method, which are realized based on Cavium equipment and are applied to the technical field of internet network traffic filtering.The device comprises a message capturing module, a rule receiving and analyzing module, a traffic restoring module, a rule matching module, a message packaging module and a message forwarding module.According to the method, a traffic capture core is used for capturing a network traffic packet from an active optical port, a service processing core is used for carrying out rule matching on the network traffic packet, and through flexible combination of rules such as quintuple matching, multimode and regular matching, the network traffic hitting a matching rule is searched for and forwarded. According to the invention, high-performance refined screening and multi-port message forwarding of multi-user traffic can be realized for large-scale network traffic, and the operation and maintenancecost of network traffic screening is reduced.

The invention discloses a named data network transmission method for a smart building. The named data network transmission method comprises the following steps: a transmission mode is judged; after the intermediate node receives the interest packet, if the intermediate node is in a Pull mode, CS, PIT and FIB are inquired in sequence, a forwarding interface is determined, and the interest packet issent to bottom-layer equipment; if the mode is a Push mode, CS and FIB are inquired in sequence, a forwarding interface is determined, and the interest packet is sent to a control center; the provider returns a matched data packet after receiving the interest packet; and after receiving the data packet, the intermediate node queries CS and PIT in sequence to complete a forwarding decision, completes data aggregation according to the name mark, and completes a caching decision by using a caching strategy. According to the invention, the named data network is adopted to carry out data transmission in a smart building scene, so that the transmission requirements of massive devices are met, and the data security is improved; on the basis, the two modes can cover all types of applications, andthe related naming mode, transmission process and caching strategy can effectively improve the data transmission efficiency and reduce the overhead.

The invention provides a method and a device for realizing traverse of an IPv6 message to an IPv4 network. The method comprises the following steps: when receiving the IPv6 message sent by a client, judging whether an IPv6 session table has a session table item corresponding to the IPv6 message or not, so as to obtain a first judging result; if the first judging result is yes, increasing an IPv4 masthead to the IPv6 message to obtain an IPv4 message, and sending the IPv4 message to a BR device through an IPv6-in-IPv4 channel in the IPv4 network; and when the first judging result is no, increasing an IPv4 masthead to the IPv6 to obtain the IPv4 message according to the IPv4 addresses of the CE and BR devices, and sending the IPv4 message to the BR device through the IPv6-in-IPv4 channel and adding a session table item corresponding to the IPv6 message in the IPv6 session table as well as adding the session table item corresponding to the IPv4 in the IPv4 session table. According to the invention, the message processing efficiency in 6rd can be improved.

The invention discloses a multi-mode switching type Internet of Vehicles routing method. The method comprises the following steps that: an RSU node performs switching judgment according to the sendingcondition of a data packet of the RSU node and the use condition of a cache stack, and performs switching among a V2I2V greedy forwarding mode, a prediction+copy transmission mode and a load balancing mode. According to the invention, the RSU wired network is utilized to assist in delivering the inter-vehicle multi-hop message. The load balancing according to the residual survival time of the data packet in combination with the estimated waiting time in the RSU message waiting queue, the data packets originally gathered in the heavy-load RSUs are shared to each light-load RSU, so that the network pressure of the heavy-load RSUs is reduced. The overtime packet loss caused by long-time waiting of the data packets in a message waiting queue of the heavy-load RSUs is avoided. Meanwhile, threeworking modes are designed for the RSU, so that the routing protocol can adapt to working environments with low vehicle node density and high vehicle node density. The end-to-end time delay of Internet of Vehicles routing is reduced, and the delivery rate is improved.