A method of identifying and extracting functional parallelism from a PLC program has been developed that results in the ability of the extracted program fragments to be executed in parallel across a plurality of separate resources, and a compiler configured to perform the functional parallelism (i.e., identification and extraction processes) and perform the scheduling of the separate fragments within a given set of resources. The inventive functional parallelism creates a larger number of separable elements than was possible with prior dataflow analysis methodologies.

Parallelization of plc programs for operation in multi-processor environments

Methods and apparatus for hierarchical routing in communication networks are disclosed. An example hierarchical routing method for a communication network disclosed herein comprises determining a plurality of constrained weighted paths to connect pairs of border nodes of a cluster in the communication network, each constrained weighted path having a respective bandwidth and a respective weight, a constrained weighted path for a pair of border nodes of the cluster being selected, based on a bandwidth threshold, from a set of possible paths capable of connecting the pair of border nodes, and advertising the plurality of constrained weighted paths determined for the cluster.

Methods and apparatus for hierarchical routing in communication networks

A method and an apparatus for advertising border connection information of autonomous system are disclosed. Moreover, the method includes: establishing and maintaining, by a border node of the autonomous system, the border connection information of the autonomous system; flooding the border connection information within the autonomous system; and receiving, by nodes of the autonomous system, the border connection information. The method and the apparatus for advertising border connection information of autonomous system of embodiments of the present invention may adapt to dynamic change of network topology, and dynamically advertise the border connection information of the autonomous system within the system in time, so as to optimize networks and improve quality of service of the networks.

Method and apparatus for advertising border connection information of autonomous system

A first cluster includes first switching devices that are compatible with a software-defined networking (SDN) protocol. A second cluster includes second switching devices within or partially overlapping the first cluster. Each second switching device is compatible with a protocol for an open systems interconnection (OSI) model layer. The first switching devices include one or more border switching devices located at a boundary between the first cluster and the second cluster. Each border switching device is also compatible with the protocol for the OSI model layer. The first switching devices effect first multipathing through the network except through the second cluster, and the second switching devices effect second multipathing just through the second cluster of the network. As such, the first switching devices and the second switching devices together effect end-to-end multipathing through both the first cluster and the second cluster of the network.

End-to-end multipathing through network having switching devices compatible with different protocols

An Autonomous System domain comprising a topology transparent zone comprising a plurality of topology transparent zone nodes at least some of which are topology transparent zone edge nodes, wherein the topology transparent zone nodes are interconnected with one another via a plurality of internal links, and a plurality of neighboring external nodes connected to the topology transparent zone edge nodes via a plurality of external links, wherein no link state advertisements (LSAs) describing the internal links are distributed to the neighboring external nodes.

System and method for topology transparent zoning in network communications

The method comprises: creating and maintaining the edge connection information on the edge router supporting OSPF protocol in autonomous system; using link state advertisement (LSA) message to carry the edge connection message, and flood-broadcasting said message; the router in system receives the LSA message and extracts the edge connection message from said message. The invention also reveals an apparatus for advertizing an autonomous system edge information comprising a edge connection information collecting module, an edge connection information database, a message generating module for packing the edge connection information into RI LSA message, and a message advertisement module for flood-broadcasting the RI LSA message in the autonomous system.

Method and device for notifying boundary connection information of autonomous system

Method and device for notifying autonomic system boundary linkage information

The invention discloses a method for announcing boundary connecting information of an autonomous system and boundary nodes. The method comprises the following steps that: the boundary nodes of the autonomous system establish and maintain the boundary connecting information of the autonomous system; the boundary connecting information is widely broadcasted in the autonomous system; and the nodes of the autonomous system receive the boundary connecting information. The method for the announcing the boundary connecting information of the autonomous system and the boundary nodes disclosed by the invention can adapt to the dynamic change of network topology, and dynamically announce the boundary connecting information of the autonomous system to the inside of the system in time, thereby realizing network optimization and improving the service quality of the network.

Method for announcing border connecting information of autonomous system and boundary nodes

A method and a border node for advertising border connection information of autonomous system are disclosed. Moreover, the method includes: establishing and maintaining, by a border node of the autonomous system, the border connection information of the autonomous system; flooding the border connection information within the autonomous system; and receiving, by nodes of the autonomous system, the border connection information. The method and the border node for advertising border connection information of autonomous system of embodiments of the present invention may adapt to dynamic change of network topology, and dynamically advertise the border connection information of the autonomous system within the system in time, so as to optimize networks and improve quality of service of the networks.

Guoyi Chen

Papers

Method and apparatus for advertising border connection information of autonomous system

Method and device for notifying boundary connection information of autonomous system

Method and device for notifying autonomic system boundary linkage information

Method for announcing border connecting information of autonomous system and boundary nodes

Method and border node for advertising border connection information of autonomous system