Abstract: A method and system are provided for fail-safe renaming of logical circuit identifiers for rerouted logical circuits in a data network. A network management module is provided for accessing a network device provisioned for routing data over a first logical circuit in the data network. The network management module is further utilized for deleting the first logical circuit in the network device upon detecting a failure in the first logical circuit and provisioning a second logical circuit in the network device for rerouting the data from the first logical circuit. In provisioning the second logical circuit, the network management module is utilized to assign a second logical circuit identifier to identify the second logical circuit.

Abstract: An apparatus and method for managing QoS in an integrated network system are provided. The apparatus includes: an information provider, a condition calculator, a policy deciding unit, and a resource allocator. The information provider is for providing policy information based on a network equipment control algorithm, a user profile and network information. The condition calculator is for calculating conditions that are used for selecting a policy based on the user profile and the network information received from the information provider. The policy deciding unit is for deciding a network equipment control algorithm in accordance with the conditions, receiving the policy information corresponding to the decided network equipment control algorithm from the information provider, and requesting resource allocation. The resource allocator is for receiving the request of resource allocation from the policy deciding unit and allocating resources.

Abstract: Various embodiments are disclosed relating to multicast address signaling for power save delivery in a wireless network. According to an example embodiment, a wireless node may transmit a management frame (e.g., a PSMP frame) to identify a scheduled data transmission time for one or more receiver nodes in a wireless network. The management frame, for example, may include a number of fields relating to a multicast transmission, such as one or more of a first field set to a value indicating a multicast transmission, a second field identifying a multicast address, a third field identifying a time for the multicast transmission, and a fourth field identifying a duration for the multicast transmission.

Abstract: A network device for processing packets. The network device includes a memory management unit for storing packets and performing resource checks on each packet and an egress module for performing packet modification and transmitting the packet to a destination port. The memory management unit includes a timer for indicating that a free space should be created on a bus slot between the memory management unit and the egress module, wherein the free space is used for transmitting CPU instructions from the memory management unit to the egress module.

Abstract: The disclosed techniques provide for eliminating real-time transport protocol, RTP, sequence number information and/or user data protocol, UDP, checksum information from the header of a packet for transmission.

Abstract: A system and method are disclosed for reliable communications in a packet network. A system that incorporates teachings of the present disclosure may include, for example, a network management system (NMS) having a controller programmed to establish between first and second customer edge (CE) routers in a full mesh packet network first and second logical data tunnels conforming to an isolation protocol, synchronize packet data in the first and second logical data tunnels, enable packet data exchanges between the first and second CE routers over the first logical data tunnel, direct the first and second CE routers to duplicate the packet data exchanged between them over the second logical data tunnel, and direct the first and second CE routers to synchronously switch to the second logical data tunnel upon detecting a fault in the first logical data tunnel.

Abstract: A method and apparatus that controls a Voice over Internet Protocol (VoIP) decoder in a communication device is disclosed. The method may include determining if a packet has been received, and if a packet has been received, determining if a receive error has occurred, and if a receive error has not occurred, setting a counter that counts a number of sequential bad frames to a value of zero, decoding the received packet, and sending the decoded packet to an audio queue for presentation to a user of the communication device.

Abstract: A method for processing data packets in an interception proxy server without using a Network Address Translation module. A TCP packet received at a router is encapsulated using generic routing encapsulation (GRE). The TCP packet is redirected to a proxy server through a GRE tunnel which includes a redirection rule comprising a local destination IP address and port to be used for traffic passed through the tunnel. When the proxy server receives the TCP packet, the TCP packet is decapsulated. If a flag is set in the payload header of the TCP packet indicating that a redirection rule has been configured for traffic passed through the tunnel, the payload header of the TCP packet is modified according to the redirection rule. The modified TCP packet is then passed to a transmission control protocol of the proxy server.

Abstract: A method of supporting a unidirectional link from a first router to a second router, the first and second routers existing in an area of a communication network, the method comprising: the second router receiving a hello packet from the first router; the second router determining that its topology information for the communication network is incomplete; the second router encapsulating an open shortest path first (OSPF) packet into an Opaque link state advertisement (LSA); and the second router flooding the Opaque LSA over the area.

Abstract: In a telecommunication system comprising a multicast group (110) and a base station (200), a signal performance value (304) is received from at least two members of the multicast group (110) to generate a set of signal performance values (306). A group leader (310) of the multicast group (110) is selected as a function of the set of signal performance values (306) to acknowledge multicast transmissions from the base station (200) to the multicast group (110).

Abstract: A massively parallel computer system contains an inter-nodal communications network of node-to-node links. Each node implements a respective routing strategy for routing data through the network, the routing strategies not necessarily being the same in every node. The routing strategies implemented in the nodes are dynamically adjusted during application execution to shift network workload as required. Preferably, adjustment of routing policies in selective nodes is performed at synchronization points. The network may be dynamically monitored, and routing strategies adjusted according to detected network conditions.

Abstract: A plurality of data signals are separated into parallel bit streams with each parallel stream having a bandwidth characteristic such that the combined cumulative effect of all the individual bandwidths produces a spectral characteristic of the data signals that match the spectral high speed data characteristic of a twisted pair.

Abstract: A method of topology discovery and identification of switches enables a user to determine the topology of a N-stage switch network. The method includes ascertaining an intended topology of the N-stage switch network, creating a list of switch boards present in the N-stage switch network, and determining a switch board connection pattern. The method further includes classifying each of the switch boards as an outer switch board, or an inner switch board, and creating a list for each type of switch board, classifying each of the switch boards on the OB list as stage 1, stage 2, or unknown, classifying each of the switch boards on the IB list as stage 3 to stage N, grouping the stage 2 and stage 1 switch boards into sectors, and numbering each type of switch board, thereby obtaining a determined topology, and validating the determined topology by comparing it to the intended topology.

Abstract: A data transmission system and method and a method of selecting a communication path for a dual-controller system are provided, which are applied in a first controller and a second controller of the dual-controller system. First of all, a corresponding transmission medium is selected according to a feature of a data request issued by a controller, then the data request is converted into a data format compatible with a medium interface corresponding to the selected transmission medium and is sent to a corresponding medium driving portion connected with the medium interface, and the data request is sent to another controller through the medium driving portion and a connected corresponding medium controller, so as to select a path of the highest transmission performance, and realize the data transmission between the two controllers.

Abstract: In a network for forwarding user packets by a tunneling protocol, an egress edge node to which tunnels concentrate from a plurality of ingress edge nodes allocates a bandwidth to each of sessions multiplexed through each of the tunnels and notifies each of the ingress edge nodes of the allocated bandwidth, and the ingress node notifies private routers or terminal devices of the allocated bandwidth.

Abstract: A switching interface comprising a switch having an input and a plurality of outputs, and a memory associated with the switch. The switch is adapted to receive a packet from the input, the packet to be forwarded to a destination device coupled to a one of the plurality of outputs. The switch is responsive to store the packet in the associated memory. The switch is further responsive to a signal from the destination device to forward the packet from the associated memory to the destination device through the one of the plurality of outputs. Optionally, the switching interface may further comprise a packet encryption engine coupled between the input and the associated memory. Typically, the output devices coupled to the plurality of outputs will each have its own separate encryption process; in these scenarios the encryption engine will have logic for determining the appropriate encryption for the output device.

Abstract: A method for analyzing a network environment, is provided. First acquiring a plurality of connection data of all network cards of a terminal device is performed. Then, according to connection data, determining whether or not a terminal device uses a PPPoE connection to connect to a network system. Finally, determining whether or not an IP address of the terminal device is a public IP address and determining whether or not the terminal device uses DHCP to acquire a target IP address.

Abstract: The variable latency associated with standard network forwarding devices is eliminated by forwarding timing packets through a network forwarding device with a constant delay. The network forwarding device of the invention time stamps timing packets that are received by the input ports with a predefined future time, and then outputs the timing packets from the output ports at the predefined time so that the transmission delay through the network forwarding device is the same from any port to any other port.

Abstract: Bounding cell reorder depth is disclosed. It is determined whether a reorder buffer that is associated with a switch fabric exceeds a depth limit. In the event that the reorder buffer exceeds the depth limit, backpressure with respect to a source associated with the reorder buffer is sent. In such cases source based back pressure information is included in a reserved field in a cell that is being sent into the switch fabric. In the event that the reorder buffer does not exceed the depth limit, the cell is sent to the switch fabric. In such cases the reserved field is present in the cell but is unused.

Abstract: Rules in NAT and firewall devices are updated only when a packet flow is verified as genuine through transport-layer message acknowledgment sequences. When a device receives a packet indicating initiation of a new association, the device stores an internal source tag, an internal destination tag, an external source tag, and an external destination tag. Only after receiving a completion acknowledgment message from the destination node, the device sets the internal source tag equal to the external source tag, and sets the internal destination tag equal to the external destination tag. The rules are then updated based on the internal tags. As a result, the approach thwarts denial of service (DOS) attacks that seek to modify rules of NAT and firewall devices to permit harmful traffic.