Abstract: The invention includes a method and apparatus for distributing flooding labels within a Multiprotocol Label Switching (MPLS) infrastructure supporting Border Gateway Protocol (BGP) Media Access Control (MAC) Virtual Private Networking (VPN).

Abstract: An apparatus and a method are described for zero packet loss task migration in an network switch in a computer network. The invention relates to active or programmable networks, i.e. networks based on packet switching algorithms and switch configurations which are subject to change. A well-defined protocol enables an intelligent switch to migrate tasks from one forwarding engine to another without any packet loss. This enables the algorithms and configurations of the switch to be updated or modified arbitrarily.

Abstract: Method for detecting interactions on a forwarding element in a network, the element adapted to forward data according to rules, a rule set installed on the element, and including a match set and corresponding action set, the match set including at least one match field and the action set including one or more actions wherein action set to be performed when matching a match set and a priority assigned to each rule, includes: determining one or more relations between match sets based on match field relations; determining one or more relations between action sets; determining one or more interactions between rules based on determined relations between match sets and action sets, each rule being tested against another rule for determining the interaction; and reducing the rule set to an actual rule set according to determined interactions so that the actual rule set includes only rules with no interactions among them.

Abstract: A method, apparatus, and computer program product are provided for preserving a signaling connection after a network has indicated that the signaling connection can be closed, such as by selection of a no follow on proceed mode during routing area updates or attach procedures. By preserving the signaling connection, subsequent communications between the network and the user equipment can be completed without closing and then subsequently reopening the signaling connection.

Abstract: Techniques are disclosed for providing fast convergence on Autonomous System Border Routers (ASBRs). In an embodiment, an ASBR receives first Virtual Private Network (VPN) route information including a first route target, a first route distinguisher, and a first network prefix and second VPN route information including a second route target, a second route distinguisher and a second network prefix. The second route distinguisher received by the ASBR is different than the first route distinguisher. The ASBR compares the first route target to the second route target and the first network prefix with the second network prefix. In response to determining that the first route target matches the second route target and the first network prefix matches the second network prefix, the ASBR associates, in a routing table, a first path based on the first VPN route information with a second path based on the second VPN route information.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for improved multi-switch link aggregation group (MLAG) convergence. According to one aspect of the subject matter described herein, a system for improved multi-switch link aggregation group (MLAG) convergence is provided. The system includes a packet forwarding device. The packet forwarding device includes a packet processor for receiving a packet and determining that the packet is destined for a port of the packet forwarding device associated with an MLAG group. The packet forwarding device further includes an MLAG module associated with the packet processor for determining that the port is inactive, and in response to determining that the port is inactive, performing a convergence operation, wherein the convergence operation includes redirecting, using a redirection filter, the received packet towards an active port associated with the MLAG group.

Abstract: A network switching device includes at least two stacking ports, each stacking port being connectable via a stacking cable to a stack including at least one external network switching device. The device further includes an internal communication medium coupled to the stacking ports and capable of transmitting a frequency division multiplexed signal between the stacking ports. The device further includes a network switch and an interface to enable communication between the network switch and the internal communication medium. The interface includes a parallel coupling to the internal communication medium such that a signal with one carrier frequency being communicated between the network switch and the internal communication medium does not interfere with transmission between the two stacking ports of a signal with a different carrier frequency.

Abstract: Within an access services network (ASN) operable for providing wireless access services to an access terminal and including a base station communicatively coupled to an ASN gateway, a new management protocol is provided for managing the R6 communications. The protocol includes a common set of message types that may be used for data plane, control plane, and individual peer applications communicating over the control plane. In one embodiment, a keepalive procedure or process is used to manage the R6 interface between the ASN gateway and the base station by sending keepalive messages through an established data path tunnel and maintaining one or more keepalive timers.

Abstract: An information handling system is provided. The information handling system includes systems and methods for expanding the port count in a single Fibre Channel domain by adding modular Fibre Channel switches. Such a system includes a system enclosure that contains a plurality of Fibre Channel modules configured to send and receive Fibre Channel packets, the Fibre Channel modules providing a plurality of Fibre Channel ports and a switch processor coupled to the plurality of Fibre Channel ports and to a plurality of Ethernet ports. The switch processor is configured to apply a stacking header to Fibre Channel packets for transmission from one of the plurality of Ethernet ports over a stacking link to another switch processor in another system enclosure.

Abstract: The present invention monitors call signaling events stemming from a circuit-switched call between a caller and a called party and controls a packet-session between user agents on respective endpoints associated with the caller and called party. The endpoints may include any type of computational device capable of facilitating the packet-session over a packet-switched network. Control of the user agents may be provided via a proxy for the user agents and may use the session initiation protocol (SIP), or like session control protocol for communications.

Abstract: A method includes receiving flits forwarded from an upstream router into a first input virtual channel (VC) associated with an input port. The flits are associated with packets originated from a first Intellectual Property (IP) core and forwarded to a second IP core. The flits are stored in a VC storage associated with the first input VC. The method further includes performing link width conversion based on a width of the flits being different from a width of an output port. Link width conversion includes accumulation of the flits when the width of the output port is wider and unpacking of the flits when the width of the output port is narrower. Credits are generated based on the flits being forwarded from the first input VC to the output port. The credits are sent to the upstream router to enable receiving more flits from the upstream router.

Abstract: A method and apparatus for diagnosing and isolating label-switched-path impairments in a network are disclosed. For example, the present method receives an impairment notification indicating a potential impairment for at least one label switched path between a source device and a destination device. The method then identifies all routers along each of the at least one label switched path. The method then determines automatically whether each of the routers along each of the at least one label switched path is enabled for exchanging label mapping information. Finally, the method identifies at least one of the at least one label switched path as being impaired if at least one of the routers on the switched path is deemed not enabled for exchanging label mapping information.

Abstract: A system and method for providing multimedia communication between a firewall protected, LAN based endpoint and an endpoint that is external to the LAN. A logical port of a multimedia communications control unit is attached to the LAN behind the firewall. Another logical port of the multimedia communications control unit is attached to the external endpoint. Multimedia communication data, consisting of call management data and media data, can be exchanged between the endpoints via the multimedia communications control unit. The multimedia communications control unit allows only multimedia communication data that strictly adheres to a particular communications protocol to pass through. Thus, the security afforded by the firewall is not compromised.

Abstract: A communication system includes: a plurality of forwarding nodes that process a packet transmitted from a user terminal, in accordance with a processing rule that has been set, and a control device that selects a forwarding node in which a processing rule is to be set, from among the plurality of forwarding nodes, such that processing rules are set so as not to be concentrated in a specific forwarding node, based on the number of processing rules that are set in each of the forwarding nodes.

Abstract: An access network is described in which a centralized controller provides seamless end-to-end service from a core-facing edge of a service provider network through aggregation and access infrastructure out to access nodes located proximate to the subscriber devices. The controller operates to provide a central configuration point for configuring aggregation nodes (AGs) of a network of the service provider so as to provide transport services to transport traffic between access nodes (AXs) and edge routers on opposite borders of the network.

Abstract: When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for a limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

Abstract: A communication technique facilitates transmission of low rate traffic over communication nodes. The nodes may be, for example, MoCA nodes. The communication happens while keeping the nodes in ultra low power mode. Accordingly, the technique increases the communication capabilities and coverage of networked nodes without impacting the overall power consumption budget. In one implementation, the technique includes encapsulating a datagram into a datagram information element, appending the datagram information element to a discovery request message, and sending the discovery request message to a network controller. The network controller extracts the datagram information element and forwards it (e.g., by broadcasting) to ultra low powered nodes, for example in an admission control frame.

Abstract: Certain aspects of the present disclosure support techniques for collecting system information in a network on a chip (NoC). A dedicated packet may be transmitted from a source node to a destination node. As it traverses through the NoC, the dedicated packet may collect information from various nodes, which may be made available by the destination node. The collected information may be used in an effort to detect failures and collect statistics regarding the NoC.

Abstract: A system that facilitate broadcast of a device discovery beacon by a dynamic physical device wishing to bind to one or more control systems are provided. If the dynamic physical device comprises of server that is configured to bind to multiple master controllers, the dynamic physical device may include a device Type Flag and set the value of the device Type Flag to indicate the dynamic physical device comprises a server. On detection of the beacon, a master controller evaluates the device Type Flag if it is present in the device discovery beacon. If the device Type Flag is present and indicates the dynamic physical device comprise a server which may bind to multiple master controllers, the master controller may automatically load a device Module for the dynamic physical device and commence commutations with the dynamic physical device with no manual intervention.

Abstract: According to some wireless network standards the size of a neighbor cell list is restricted to a maximum size. The limited size of a neighbor cell list may not reflect the realities of a wireless network deployment, especially for deployments including numerous femto cells clustered in close proximity. Accordingly, as the concentration of macro cells and/or femto cells in an area increases, there lies a challenge to identify and communicate neighbor lists to user devices that reflect the arrangement of a particular portion of the deployment and the needs of the user devices. Various systems, methods and apparatus described herein are configured to provide a user device or a group of user devices a neighbor cell list that includes neighbor cell identifiers chosen from a candidate list.

Abstract: A method, apparatus, and machine readable storage medium is disclosed for establishing a test protocol processor which autonomously intercepts success path protocol messages at a network element port buffer and substitutes a corresponding failure path messages to simulate the introduction of unexpected protocol messages into the protocol message flow from an external source to the network element under test. Subsequent to intercepting messages, the test protocol processor may perform one or more of several actions according to the results of statistical calculations. These actions include allowing the message to drop, replacing the message after a delay, replacing the message after altering the payload of the message, and replacing the message after altering the message type. The disclosed autonomous self disrupting network element is particularly useful for providing a means to perform in situ field testing of network performance indicators under desired statistical conditions.

Abstract: A communication system providing a multimedia service which enables requesting a communication network to cancel a registration for a calling terminal as a bad terminal in the communication network. Typically, the calling terminal is connected to a calling-side communication network; and if the calling terminal is registered as a bad terminal in a called-side communication network, the calling-side communication network requests the called-side communication network to cancel the registration. The calling terminal may be informed that reception of a communication in the communication system has been restricted.

Abstract: A method for facilitating a sequenced, anonymous communications session in a communications environment is provided in one example that includes receiving, from a first endpoint, an anonymous, sequenced request for a communication session involving a second endpoint. The communication session is sequenced to occur at designated periods provided by the end user(s) and/or an administrator, while maintaining end user(s) anonymity.

Abstract: Techniques are provided for establishment of multiple concurrent virtual networks. In one example, there is provided a method operable by a virtual network controller (VNC) or the like. The method may involve establishing communication links with a plurality of virtual network interfaces (VNIs) operatively coupled to a plurality of virtual networks. The method may involve establishing a single port communication link with an operating system. The method may involve allowing the virtual networks to be transported on top of a physical network, and facilitating communication between the operating system and the virtual networks via the single port communication link.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a server having a controller to receive presence information from each presence source of a plurality of presence sources, wherein the presence information is associated with a user, receive a Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) which identifies the user, wherein identification information associated with the user from each presence source is mapped to the SIP URI, select at least a portion of the received presence information to be utilized in determining a presence status of the user, determine the presence status of the user based on the selected presence information, and transmit the presence status and the SIP URI to a computing device operably coupled to an Internet Protocol Multimedia Subsystem (IMS) network. Other embodiments are disclosed.

Abstract: A system for processing calls with a time division multiplexing (TDM) network and routing the calls via an internet protocol network is disclosed. The system may receive a call from a call originating device. The call may then be routed to a time division multiplexing switch at which call processing is performed to determine routing information for the call. The routing information may then be received at a first VoIP media gateway, and the call may then be routed by the first VoIP media gateway. Once the call is answered, the connection between the time division multiplexing switch and the VoIP media gateway may be terminated to enable the total number of terminations to be reduced, thereby creating a more efficient system.

Abstract: The present application provides a packet processing method, device and system. With the present application, timely processing can be performed on a received packet according to an added first flow table entry, so that the timely processing can be implemented for a flow whose importance is high, and the problem in the prior art that a forwarding device cannot add a new flow table entry to a flow table because all flow table entry resources are in use can be relieved, thereby improving the reliability of packet processing.

Abstract: Synchronization of traffic multiplexing in link aggregation is described. In an embodiment, a first link aggregator and a second link aggregator are associated with a plurality of links. The first link aggregator maintains an identifier for each link indicating at least a state of enabled or disabled. A synchronized clock is established between the first link aggregator and the second link aggregator. A particular link of the plurality of links is transitioned. Wherein, the transitioning is performed by the first link aggregator sending, to the second link aggregator, a first message identifying a particular time to transition the particular link. The first link aggregator receives, from the second link aggregator, a second message indicating that the particular time is acceptable. In response to a determination that the second message indicates that the particular time is acceptable and that the synchronized clock has reached the particular time, transitioning the link.

Abstract: Systems, methods and apparatus for pseudo-link creation. In some embodiments, a network device operates in a network comprising a first switch device and a second switch device. The switch device may receive a control message from the first switch device and selectively forward the control message to the second switch device so as to create a pseudo-link between the first switch device and the second switch device.

Abstract: Aspects describe spectrum authorization, access control, and configuration parameters validation. Devices in an ad-hoc or peer-to-peer configuration can utilize a licensed spectrum if the devices are authorized to use the spectrum, which can be determined automatically. Aspects relate to distribution of authorization tickets by an authorization server as a result of validating a device's credentials and services to which the device is entitled. An exchange and verification of authorization tickets can be performed by devices as a condition for enabling a validated wireless link using the spectrum.

Abstract: In one embodiment, a source device determines a source route from itself to a destination device in a computer network, and forwards a first packet on the source route with the source route included within the first packet. In addition, the source device generates a second packet with the source route included within the second packet, the second packet also including an indication to cause one or more of a plurality of transit devices to forward the second packet to a reachable 1-hop neighbor of a device in the source route two hops away from the respective transit device. The source device may then forward the second packet itself, as do one the one or more transit devices on a diverse path based on the source route, to a particular reachable 1-hop neighbor of a particular device in the source route two hops away from the source (or transit) device.

Abstract: A variable-frequency network connection establishing method is adapted for establishing a connection between a local network device and a remote network device. The variable-frequency network connection establishing method includes the steps of: providing a plurality of local communications protocols including a local standard communications protocol and a local variable-frequency communications protocol to the remote network device; receiving a remote communications protocol provided by the remote network device; generating an indicator signal in accordance with the remote communications protocol and the plurality of local communications protocols; and operating in one of a standard mode and variable-frequency mode according to the indicator signal.

Abstract: A mechanism for securely and dynamically reconfiguring reconfigurable logic is provided. A state machine within a data processing system establishes a hardware boundary to the reconfigurable logic within the data processing system thereby forming isolated reconfigurable logic. The state machine clears any prior state existing within the isolated reconfigurable logic. The state machine authenticates a new configuration to be loaded into the isolated reconfigurable logic. The state machine determines whether the authentication of the new configuration is successful. Responsive to the authentication of the new configuration being successful, the state machine loads the new configuration into the isolated reconfigurable logic. The state machine then starts operation of the isolated reconfigurable logic.

Abstract: A method for implementing an IP Multimedia Subsystem (IMS) registration, includes: a Home Subscriber Server (HSS) recording a current registration state of a User Equipment (UE) in response to receiving a Multimedia Authentication Request (MAR) initiated by a Service Call Session Control Function (S-CSCF) selected for the UE when a first Register request is sent by the UE; in response to receiving a second Register request initiated by an Interrogating Call Session Control Function (I-CSCF), the HSS sends the S-CSCF Name to the I-CSCF when the current registration state of the UE is an assigned S-CSCF state. By the scheme, a same S-CSCF is ensured to be used in the two User Authentication Request/User Authentication Answer (UAR/UAA) procedures of the initial IMS registration procedure, and the initial IMS registration of the UE is implemented successfully.

Abstract: The present invention provides methods and systems for managing matrices of connections within digital switching fabrics. The methods and systems include means for defining one or more of sources and sinks in a matrix of connections as one or more of unidirectional connection termination points and novel unidirectional virtual connection points, where each of the unidirectional virtual connection points is a logical object that is maintained in software that defines connections between one or more of network resources and logical objects.

Abstract: A notification method, an access point (AP), a station (STA), and a wireless system are disclosed. The notification method includes checking whether a power event occurs, and notifying the power event to an STA if the power event occurs. According to the present invention, the STA can learn about the power event, which helps the STA to decide on the subsequent action according to the power event.

Abstract: A system and method are disclosed for the repair of IP multicast sessions. A repair server polls multiple transmit servers to accumulate as many of the packets missing from the multicast session as possible. A network includes a source of multicast packets in a multicast session and a plurality of multicast recipients in that session. A repair server in the network provides the packets it receives to the recipients. The repair server includes a missing packet detector. There is a plurality of retransmit servers in the network buffering portions of the packets they respectively receive during the session. The repair server maintains an ordered list of the retransmit servers that are most likely to have buffered copies of packets missing from the session. When the repair server detects that there are packets missing from the session it has received, it uses the ordered list to sequentially request the missing packets from respective ones of the plurality of retransmit servers.

Abstract: The invention provides a method and network communication equipment for low latency loss-free burst switching. Burst-transfer schedules are determined by controllers of bufferless core nodes according to specified bitrate allocations and distributed to respective edge nodes. In a composite-star network, burst schedules are initiated by any core node. Burst formation takes place at source edge nodes and a permissible burst size is determined according to an allocated bitrate of a burst stream to which the burst belongs. The permissible burst size is subject to constraints such as permissible burst-formation delay, a minimum guard-time requirement, and permissible delay jitter. A method of control-burst exchange between each edge node and each bufferless core node enables burst scheduling, time coordination, and loss-free burst switching. Both the payload bursts and control bursts are carried by optical channels connecting the edge nodes and the core notes.

Abstract: A Content-Centric Network and a method of performing routing between domains therefor are provided. The method includes identifying a route from an anchor hub in a first domain to one or more hubs in the first domain, the anchor hub being configured to store routing information between a first border hub of the hubs in the first domain and a second border hub in a second domain, detecting, by each of the hubs in the first domain, a neighboring hub based on a sync direction corresponding to the identified route, and sharing the routing information with the neighboring hub, the sharing of the routing information including performing a sync operation between the neighboring hub and each of the hubs in the first domain.

Abstract: An intelligent policy server provides multiple service features and controls bandwidth usage in an ATM network. Signaling messages generated at an edge switch prior to establishing an end-to-end switched virtual circuit are intercepted by a signaling intercept processor for effectuating policy features or permissions by executing appropriate service logic at the policy server associated with the edge switch. A return message from the policy server determines whether a call connection can be made through the network. Profile arrays are provided which define feature authorizations and provisioning for subscribers and Customer Logical Ports served by the edge switches.

Abstract: In one embodiment, a method includes receiving at a protocol translator a first message from a first endpoint to a second endpoint. The first message includes a list of media capabilities of the first endpoint. The method also includes transmitting from the protocol translator a second message to the second endpoint including a media capabilities request header and receiving at the protocol translator a response message from the second endpoint. The response message includes a response header including a list of the media capabilities of the second endpoint.

Abstract: In a network, some data are transmitted between stations during time slots in contention free periods. Selecting the time slots includes collecting timing information at some stations in the network. The timing information indicates the times of existing time slots used by stations whose transmissions can be reliably received by the station collecting the timing information. The timing information is distributed to other stations in the network. A new time slot for transmission between a first and a second station is selected based at least on timing information indicating the times of existing time slots used by stations whose transmissions can be reliably received by at least one of the first and second station.

Abstract: A MAC address management method for use in a computer system having a disk device to store a MAC address and assigns the MAC address to an open network adaptor (ONA) printed board, which has a memory retaining a MAC address and an open network adaptor, mounted into the computer system. The METHOD includes: reading, when an ONA printed board is mounted into the computer system for the first time, the MAC address from the memory on the ONA printed board and storing the MAC address in the disk device and invalidating the MAC address; and validating, if a migration instruction is inputted, the MAC address stored in the memory of the ONA printed board mounted in the computer system.

Abstract: A communication session between a user of a communication network and a communication system is controlled. The communication network comprises a first network and a second network. The communication system operates on the first network. A session request packet is transmitted from a device of the user to a first node in the first network. The session is initiated with the communication system at the first node responsive to receiving the session request. During the session, a calling identity is provided from the first node to the device and used by the device during a communication event between the user and an entity. The calling identity is used to establish a connection between the device and a second node in the second network. The calling identity is associated with an address of the entity. Upon termination of the session, the calling identity is disassociated from the address of the entity.

Abstract: A bit sequence, which is contained in a signalling message and which is known to a network unit and to a communications terminal which receives the signalling message from the network unit, informs the communications terminal that a test value is contained in a signalling message. The test value received by the communications terminal is compared with a test value computed by the communications terminal, and the communications terminal defines a signalling message as being unmodified only in the event that the bit sequence contained in a signalling message has been received and the comparison of both test values yields a positive result.

Abstract: A method and an apparatus for performing a distributed control of end-to-end media on packet networks such as Voice over Internet Protocol (VoIP) and Service over Internet Protocol (SoIP) networks are disclosed. The method first receives a request from a first media endpoint device for opening at least one media channel to a second media endpoint device wherein said request contains a descriptor of said first media endpoint device. The method then updates one or more slot states and link states in response to said request and records the current state of each slot for supporting said media channel. The method also records the most recently received descriptor of said media endpoint device as a most recent descriptor for said slot supporting said media channel. The method executes one or more link objects in response to said request for controlling said at least one media channel.

Abstract: A solution for establishing a session of a real-time media communication service in a communication system comprising at least two separately administered subsystems. The session establishment comprises receiving a request for session initiation, querying subscriber information related to the requested session, and initiating the session according to the queried subscriber information. The invented method comprises detecting that the terminating subscriber does not belong to the same subsystem as the originating subscriber, determining a defined transit server associated with the terminating subscriber, said transit server having access to a subscriber database of the subsystem of the terminating subscriber, and querying subscriber information related to the requested session with a first control message comprising parameters of the requested session to the transit server.

Abstract: Not Mobile IP (NMIP) comprises methods for implementing macro-mobility in an IP network, wherein macro-mobility means the ability of a node to change its network-layer, e.g., IP, address without disturbing existing transport-layer and application-layer sessions, e.g., conversations. When two NMIP nodes establish a new NMIP session, they exchange pseudo-random numbers, or nonces, and store the nonces in a session table. When a first node changes its IP address, the first node sends to the second node an address-update message that contains the new IP address and the first node's nonce. If the received nonce matches a nonce in the session table, then the second node updates its protocol control blocks with the new IP address, and sends an address-update reply message to the first node. Internet Protocol Security (IPsec) can be used to secure or replace the exchange of nonces.

Abstract: Method for use in updating a routing information base of a node of a network, said routing information base comprising for each destination node of a number of destination nodes in said network a number of paths; wherein an update message with routing information is sent in said network from a first node to a peer of the first node, said first node having a first routing information base; wherein the update message comprises: a selected path for a first destination node of said number of destination nodes, said selected path comprising a next hop node adjacent the first node; at least one routing topology variable derived from the number of paths available for said first destination; said at least one routing topology variable being a measure for the risk on bottlenecks in the selected path.

Abstract: A method of controlling and delivering media content from a media server (MS) to a media renderer (MR) utilizing a wide area IMS network for control. The method involves: provisioning a serving node in the IMS network with control point (CP) logic that includes logic to negotiate media content delivery with a least one of an MS and an MR; provisioning a user endpoint (UE) device of the IMS network with control point proxy (CPP) logic that includes logic to negotiate media content delivery and VCR controls to control media presentation; in response to a media content delivery request, invoking the CPP logic and the CP logic to cooperatively negotiate media content delivery between an MS and an MR that uses local wireless or land line connections when possible in order to minimize wide area bandwidth usage.