Abstract: The present invention provides a method and system for assuring H.323 alias address portability to an H.323 user in real-time H.323 multimedia communications where the H.323 user is registered with a home gatekeeper for the home zone of the H.323 user. Alias address portability may be obtained using a central database that is known to the administrative zones and is used for alias address mapping, or alternatively, may be obtained by using a distributed database. The method may be implemented by: sending, by the H.323 user, a message with a called H.323 entity's alias address, to the home gatekeeper to originate a call to the called H.323 entity; confirming that the alias address, services, and service providers are portable; converting the alias address to a called routable alias address for the called H.323 entity and sending the alias address to the H.323 user; and placing the call to the called H.323 entity.

Abstract: A communication scheme capable of realizing operations to supplement the resource shortage or the poor environment of the portable terminal device. At the radio portable terminal device, whether a specific processing of the data packets received from a correspondent device connected to the computer network or the telephone network is to be carried out using resources of the radio portable terminal device or not is determined according to an attribute of the data packets or data contained in the data packets, and a part or whole of the data contained in the data packets are transferred to another portable computer/device connected to a local network or another computer connected to the computer network, such that the specific processing of the data packets determined not to be carried out using the resources of the radio portable terminal device is carried out at another portable computer/device or another computer.

Abstract: A network processor for processing information elements is described. Each information element is associated with a flow and comprises at least one information element segment. A policy controller stores an information element into at least one information segment storage unit within a memory, and determines whether an information element segment conforms to a predetermined quality of service (“QoS”). A traffic processor selects the information element segment for forwarding based on at least one QoS parameter. A forwarding processor forwards the selected information element segment to an egress port.

Abstract: A system and method are provided for configuring interface bandwidths in a packet communications switch fabric. The method comprises: interfacing data links with a first plurality of traffic managers (TMs); differentiating port card interface ports into a first plurality of subchannels associated with the first plurality of TMs; and, communicating packets information with the TMs at a first plurality of data rates corresponding to the first plurality of subchannels. More specifically, differentiating port card interface ports into a first plurality of subchannels associated with the first plurality of TMs includes: differentiating a second plurality of ingress data links into a third plurality of ingress subchannels associated with a third plurality of ingress traffic managers (iTMs); and, differentiating a fourth plurality of egress data links into a fifth plurality of egress subchannels associated with a fifth plurality of egress TMs (eTMs).

Abstract: A normalizing signaling gateway (NSG) routing node receives a first signaling message formatted according to a first variant of a common or standard signaling protocol, such as ISUP, and creates a second signaling message based on the first message. The second signaling message includes a normalized component and a variant component. The second signaling message may then be routed to a second NSG routing node or to a media gateway controller. Because the NSG routing node converts messages to and from variants of a standard signaling protocol, the media gateway controller is not required to support all of the variants of the standard signaling protocol, and its complexity is reduced.

Abstract: The ATM transmitting apparatus for transmitting messages, such as frame relay packets, associated with a plurality of connections comprises ATM layer transmission equipment for receiving multiple messages, segmenting each received message into a plurality of smaller data units, such as 48 byte AAL SAR protocol data units, and multiplexing such data units into a single stream for transport over a physical interface. A scheduler receives messages from each of the connections and transfers the messages to the transmission equipment. The scheduler can dynamically set a transmission rate for any connection, and allocates each connection whose message is transferred to the transmission equipment a substantially maximal amount of bandwidth at any given time during the transmission of the message, to thereby minimize interleaving of data units from the various connections and reduce the average latency (per unit of message) in transmitting the messages across a network.

Abstract: A storage router includes an IP network interface with IP network ports and data path processors. Each of the data path processors may control one of the IP network ports. High speed communication links couple the data path processors with a fiber channel switch. The storage router may route IP datagrams between the data path processors using the fiber channel switch. The fiber channel switch switches fiber channel packets between the data path processors and a plurality of fiber channel switch ports. The fiber channel packets may be encapsulated IP datagrams. Fiber channel packets received at a data path processor may be re-encapsulated and sent back through the fiber channel switch to another data path processor when the packets are destined for IP addresses associated with IP network ports controlled by other data path processors. Among other things, asymmetric data paths, and multiple and redundant communication paths with host systems are supported.

Abstract: A traffic shaping apparatus calculates a minimum transmission interval, an allowed transmission frame rate of a user frame, and a reference transmission interval for each user according to a minimum transmission frame rate and a peak transmission frame rate specified for each user. The traffic shaping apparatus also calculates a first estimated transmission time according to the reference transmission interval, and a second estimated transmission time according to the minimum transmission interval for each user. The traffic shaping apparatus determines the user having the earliest first estimated transmission time, and determines according to the second estimated transmission time of the user whether a user frame is to be transmitted.

Abstract: In a SONET apparatus, the data flow differences between OC-768 and OC-192 can be exploited to effectuate conversion between OC-768 and OC-192 using as little as 256 bytes of memory.

Abstract: A system and method permits the creation of very-large metropolitan area networks (MANs) using Layer 2 (L2) switching technology. Different groups of L2 switches are logically organized into Islands. Connected to each Island are a plurality of customers sites, and an interconnect fabric couples the Islands together. The Islands cooperate to provide a Virtual Ethernet Connection (VEC) to each set of customer sites being coupled together. Customers identify their traffic that corresponds to a VEC by labeling or tagging it with a Customer-Equipment VLAN Identifier (CE-VLAN ID). Within each Island, the CE-VLAN ID specified by the customer's traffic (and hence the corresponding VEC) is mapped to a unique MAN Provider-Equipment VLAN ID (PE-VLAN ID). To prevent the formation of loops, the Islands run the Inter-MAN Control Protocol (IMCP), which represents a modified version of the Multiple Spanning Tree Protocol (MSTP).

Abstract: A method and a Network Element (NE) for manifesting alarms by forming a so called combined Data Quality Byte (DQB) for a particular SDH/SONET data transmission stream. The DQB indicates status of alarms at a particular location of the telecommunication network, via which the stream is transmitted. The DQB can be formed by arranging a plurality of alarm signals, currently actual for the particular data transmission stream, in a predetermined byte associated with the stream frame. The NE, upon receiving from an upstream network element a data transmission stream with its DQB1 formed upstream, creates an updated DQB2 and compares DQB1 with DQB2 to manifest an alarm status change ?DQB for estimating quality of transmission via the network section.

Abstract: A method for preventing information losses due to network node failure is disclosed. The method comprises the steps of operatively connecting at least one backup node to a primary node, followed by synchronizing the at least one backup node and the primary node. Next, the method comprises receiving, from a first endpoint, ingress traffic in the primary node and replicating the ingress traffic to the at least one backup node. Next, the method outputs, from the primary mode, primary egress traffic and outputs, from the at least one backup node, backup egress traffic. The method then determines if the primary node has failed. Then, the method transmits, to a second endpoint, the primary egress traffic if it is determined that the primary node has not failed, and transmits, to the second endpoint, the backup egress traffic from a selected one of the at least one backup nodes if it is determined that the primary node has failed.

Abstract: The available delay budget for a full-duplex communication is distributed between the links depending on their activity, present and near history. By keeping track on if a link in a full-duplex communication system is active or inactive, i.e. Knowing the information value of the transferred data, coding procedures having larger coding delays than normally accepted can be used for active links, if the opposite link simultaneously is inactive. Since the user sensibility for delays is as largest at the moment a link becomes active, coding procedures having smaller coding delays than normally used are assigned at the moment a link becomes active. The coding delay is subsequently increased. Preferably, the round-trip delay is controlled to be kept smaller than a requested maximum value.

Abstract: To determine the transmission efficiency of a data communication network in order to raise the data throughput, the transmission-time, that means the time actually used for user data transmission, is determined. By building the ratio of the transmission-time and the duration of the respective user data transfer session the network operator can measure the transmission efficiency. Depending on the transmission efficiency he then can improve the data throughput by either raising the transmission efficiency or by adding more transmission capacity.

Abstract: The present invention provides systems and methods for providing on-demand datacasting. A system according to an exemplary embodiment of the present invention comprises a rate generator for controlling the rate at which data signals are combined with audio/video signals. The system may also include a system controller for controlling the rate of the rate generator. The system controller may also monitor the complexity of the audio/video signals, calculate an average complexity of the audio/video signals, calculate an average complexity of the audio/video signals and determine whether the average complexity is greater than the typical complexity of audio/video signals. The system controller may adjust the rate of the rate generator based on the determination of whether the average complexity of the audio/video signals is greater than the typical complexity of audio/video signals.

Abstract: The link round trip delay between two switches in a Fibre Channel network may be determined by sending a particular timing signal value from an originating switch to a responding switch. The responding switch may store the timing signal value in an “echo” register for comparison to subsequently received timing signals. The originating switch may then send the pre-selected timing signal to the responding switch while simultaneously starting a timer. When the responding switch receives the timing signal, it may compare the value of the received signal to that stored in its echo register. If the value, is the same, the responding switch may retransmit—i.e., echo—the timing signal to the originating switch. When the originating switch receives the echoed timing signal, it may stop its timer and compute the link round trip delay time. The computed link round trip delay time between the originating switch and the responding switch may be advantageously used in fabric routing algorithms.

Abstract: A system and method is provided for traffic management and regulation in a packet-based communication network, the system and method facilitating proactive, discriminating congestion control on a per flow basis of packets traversing the Internet via use of a Weighted Random Early Detection (WRED) algorithm that monitors the incoming packet queue and optimizes enqueuing or discard of incoming packets to stabilize queue length and promote efficient packet processing. During optimized discard conditions, the system and method discern a relative priority among incoming packets, distribute packets with a relatively high priority and discard packets with a relatively low priority. Additionally, packet traffic are policed and discarded according to packet type, quantity or other predetermined criteria. The present invention performs in periodic mode, demand mode or both, and can be implemented as a hardware solution, a software solution, or a combination thereof.

Abstract: A routing system provides for transparent routing system failover by checkpointing route prefixes during normal operation by maintaining a route prefix table. After failure of a primary routing processor, routing with peer routing systems is synchronized through the use of this prefix table. The prefix table is managed by the primary routing processor and is accessible by a backup routing processor at least after failure of the primary routing processor. Upon the detection of a failure, a backup routing processor solicits routes from peer routing systems in response to the failure and generates a backup routing database from the routes received from peer routing systems. The backup routing processor also compares prefixes of routes in the backup routing database with prefixes in the prefix table, and sends route withdraw messages to the peer routing systems for routes having prefixes listed in the prefix table and not identified in the backup routing database.

Abstract: A method for resetting a MAC-hs (Medium Access Control-high speed) layer entity in a communication system using HSDPA (High Speed Downlink Packet Access). When an RLC (Radio Link Control) layer entity is reset due to occurrence a protocol error, the system resets both a MAC-hs layer entity of the RLC layer entity and its counterpart RLC, thus preventing unnecessary data transmission.

Abstract: In a communication system for carrying out satellite communication through a satellite among users, a satellite communication center is located in a terrestrial network, such as an internet, and has a program table accessible through the terrestrial network and representative of a time schedule of each program to be broadcast through the satellite. The program table can be reserved to broadcast contents by a sender through the internet when an empty time zone is left on the program table. When the reservation is accepted, the contents are sent from the sender through the internet to the satellite communication center and are broadcast at a reserved time through the satellite to other users in accordance with the program table. The contents may be stored in advance in an information storage of the satellite communication center once before they are broadcast or be directly broadcast to the satellite at the reserved time.

Abstract: The present invention provides curable gel compositions and also cured gel compositions which possess unexpectedly superior combinations of physical properties and aging resistance. These compositions are particularly useful for environmentally protecting substrates especially electrical conductors, connectors and splices and for sealing around jacketed cables, for example, where they enter splice cases.