Abstract: This document describes tools that forward data packets having tags conforming to different formats. In one embodiment, the tools receive a data packet on each of a plurality of ports, each data packet comprising a tag conforming to a different format. The tools relay the data packets to a port capable of transmitting tags conforming to a plurality of formats. In another embodiment, the tools receive a plurality of data packets on a source port comprising a plurality of logical source ports, each of which is associated with a unique tag. At least one data packet is received on each logical source port. Each data packet includes the tag associated with the logical source port on which the data packet is received. The tools map each data packet to one of a plurality of virtual switches based on the logical source port on which the data packet is received.

Abstract: A Join message load control system in a network using a Protocol Independent Multicast-Source Specific Multicast (PIM-SSM) protocol, the Join message load control system including a source access hop router creating a SOURCE-INACTIVE message and transmitting the created SOURCE-INACTIVE message when a multicast traffic is not received from the multicast server during a set Keep-Alive Time (KAT), and the SOURCE-INACTIVE message including information on an update set time of a PIM Join message; and a group access hop router resetting the update set time of the PIM Join message when the SOURCE-INACTIVE message is received from the source access hop router. Accordingly, it is possible to reduce the periodical transmission of unnecessary Join(S, G) messages and thereby reduce traffic load in a network by adjusting a JP timer of the Join(S, G) message depending on whether a channel(S, G) is active or inactive.

Abstract: A method for classifying a data packet containing a header is provided. The method may comprise parsing the header of a data packet into header elements. Rules in secondary lookup tables generated from a primary lookup table may be accessed. The respective header elements of the data packet may be compared to the respective fields of each of the secondary lookup tables, and rule results for each of the secondary lookup tables in a combinable format may be generated. In another embodiment, a method for generating secondary lookup tables from a primary lookup table is provided. The method may comprise accessing a primary lookup table defining packet classification rules and generating multiple secondary lookup tables from the primary lookup table. For each secondary lookup table, a selection of classification rules and a selection of fields of the multiple fields based on a rule set identifying predefined entries may be extracted.

Abstract: In one embodiment, correlating label switched paths of a pseudowire includes receiving a first message at a second label switching router. The first message is sent from a first label switching router and includes a pseudowire identifier and a first label switched path identifier. The pseudowire identifier identifies a pseudowire, and the first label switched path identifier identifies a first label switched path that implements the pseudowire. A second message is sent from the second label switching router to the first label switching router. The second message comprises the pseudowire identifier and a second label switched path identifier. The second label switched path identifier identifies a second label switched path that implements the pseudowire.

Abstract: Methods and systems for maintaining a connection between a first node and a second node communicating via a connection within a communication network. Data is communicated between the nodes on the basis of addresses assigned to the respective nodes. The addresses are managed by an address management node of the communication network. The system includes a detector unit, at the first node, configured to detect an outage of the existing connection between the nodes, a consulting unit, at the first node, configured to consult after detecting the outage of the connection, the address management node to verify the address assigned to the second node, a transceiver unit, at the address management node, configured to return a current address assigned to the second node, and a connection re-establisher unit, at the first node, configured to re-establish the connection based on the current address assigned to the second node.

Abstract: Described are techniques for prioritizing messaging traffic. A first message having a second message encapsulated in a payload of the first message is received. It is determined whether the first message meets one or more prioritization criteria in accordance with one or more portions of a payload of the second message.

Abstract: In general, the invention relates to a method for routing a packet. The method includes receiving the packet in a network interface card (NIC), classifying the packet, placing the packet in a receive ring of the NIC, sending the packet to a virtual NIC associated with the receive ring, sending the packet to a first container associated with the virtual NIC, and routing the packet to a packet destination using the first container.

Abstract: A method and apparatus for receiving burst data in an OLT of an EPON are provided. The method includes the steps of: a) receiving burst data from the plurality of ONUs; b) generating a multipoint control protocol (MPCP) LOS signal for reducing a synch time of the burst data; c) reducing the synch time in response to generation of the MPCP LOS signal; and d) recovering the received burst data by performing a code-group sort in a period where the MPCP LOS signal is not generated.

Abstract: A method of simulating a telecommunications network may include providing a database including status information for a plurality of virtual network elements. More particularly, the status information for each of the plurality of virtual network elements may include a respective network element identifier. A communication including a received network element identifier may be received. If the received network element identifier does not correspond to a network element identifier included in the database, status information for a new virtual network element may be added to the database and the status information for the new virtual network element may include the received network element identifier. After adding the status information for the new virtual network element, a communication regarding the new virtual network element may be transmitted. Related systems and computer program products are also discussed.

Abstract: Provided are an Ethernet line card and a method of providing various services using the same. The Ethernet line card includes: a priority allocation unit setting a priority of a received Ethernet packet according to a pre-set control standard based on header information of the Ethernet packet; a quality of service (QoS) guarantee unit defining a capacity per class based on a pre-set QoS standard, inserting the Ethernet packet into a relevant class, and dropping and managing the Ethernet packet based on the priority if the Ethernet packet exceeds a capacity of the relevant class; and a signal processing unit managing and updating the pre-set control standard and the pre-set QoS standard, receiving results of processing the Ethernet packet from the priority allocation unit and the QoS guarantee unit, and storing the received results.

Abstract: Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.

Abstract: An audio network system allows any two nodes among a plurality of nodes to transmit and receive audio data to and from each other. The plurality of the nodes are connected in loop so as to allow transmission of the audio data in loop manner through the plurality of the nodes, and the transmission of the audio data is performed in one direction from an upstream node to a downstream node. One of the plurality of the nodes is set as a master node and the other nodes are set as slave nodes. The master node periodically transmits a packet of frame data containing the audio data every sampling period, such that the packet transmitted from the master node circulates through the plurality of the nodes to return to the master node within one or more sampling period. The packet has a specific data length and includes an audio data storage region divided into a plurality of blocks corresponding to a plurality of channels, such that each of the blocks stores audio data of the corresponding channel.

Abstract: A system and method are disclosed for routing packet traffic. A system that incorporates teachings of the present disclosure may include, for example, a Provider Edge (PE) router having a routing element that routes packet traffic between a plurality of autonomous systems according to one or more Virtual Routing and Forwarding (VRF) tables each having a plurality of Enhanced Interior Gateway Routing Protocol (EIGRP) Autonomous System (AS) numbers. Other embodiments are disclosed.

Abstract: A method for providing support for multiple control channels includes establishing an indirect data connection with a first network entity in an optical network. The method also includes establishing a first control channel with the first network entity. The first control channel has at least one unique source IP address. The method additionally includes transmitting a first control message to the first network entity via the first control channel. The first control message comprises a first unique source IP address.

Abstract: In an audio network system connecting a plurality of nodes in a ring form, a master node transmits a packet of frame data regularly every sampling cycle, such that the packet circulates through the nodes during the sampling cycle. The packet is provided with a plurality of regions for containing audio sample data in correspondence to a plurality of channels. A first node reads audio sample data from a particular region of the packet, which corresponds to a particular channel allocated to the first node, and stores the read audio sample data in a buffer. The first node acquires positional information indicating whether a second node which has written the audio sample data into the particular region is located upstream or downstream of the first node. The first node reads and outputs a previous one of the audio sample data from the buffer if the second node is located upstream of the first node, and outputs a current one of the audio sample data if the second node is located downstream of the first node.

Abstract: Apparatus and methods for system multiplexing and program element identification is disclosed. A multiplexer generates a sequence of transport packets and associated program element information tables (PEIT). The header of a transport packet carrying the PEIT includes a unique PEIT indicator. A de-multiplexer first locates the PEIT by the unique PEIT indicator in the transport packet header. The de-multiplexer utilizes the corresponding program element identifier (PEID) of the program specific information (PSI) to search for the required transport packet that contains the PSI. The de-multiplexer then locates and extracts the needed elementary streams by searching for the associated PEID in the PEIT. The elementary streams are then sent to decoders for further processing.

Abstract: Embodiments of the present invention provide a method and a system for implementing multicast using a slave block in DSL access technique. Several slave blocks are cascaded with a master block accessed to the DSL. The master block and slave block are respectively connected with DSL users via RTUs, and access an uplink via a network interface of the master block. The slave block is configured to support the IGMP proxy or the IGMP snooping so as to implement multicast function independently. This invention overcomes the shortcomings including the heavy burden on the master block, low efficiency and serious waste in bandwidth resulting from the fact that the operation of the slave block multicast member is implemented in the master block, thus increasing the efficiency of multicast and saving bandwidth of the master block.

Abstract: A method for verifying interoperability of an implementation of a communication standard includes monitoring a symbol comprising a set of subcarrier symbols in a communication stream, in which some of the subcarrier symbols of the symbol are generated from pilot symbols, transmitted on subcarriers in accordance with the standard. For a given implementation and a given symbol, it is known which subcarriers will be pilot symbols, and what their pilot symbol values will be. A communication stream, generated by an implementation that is interoperable with the standard, will contain expected pilot information. Using the implementation to be verified, a communication stream is generated, containing pilot information. The generated pilot information is compared with the expected pilot information, and interoperability is determined based on the result of the comparing.

Abstract: A method for routing a packet. The method includes receiving the packet from a first network into a network interface card (NIC), where the NIC is operatively connected to a host and the host includes a first virtual network stack and a second virtual network stack. The method further includes sending the packet to a first virtual network stack, where the first virtual network stack includes a first filter, a first network layer, and a first transport layer. In addition, the first filter, the first network layer, and the first transport layer are isolated from the second virtual network stack. If the packet is permitted through the first filter in the first virtual network stack, then the packet is sent to a first virtual NIC.

Abstract: A system and method for routing packet traffic is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a router having a routing element that routes packet traffic according to Internal Gateway Protocol (IGP) weights that prevent multicast packet traffic and unicast packet traffic from occupying a common unidirectional link. Other embodiments are disclosed.