Abstract: In communications networks, network elements require knowledge of other network elements such as when they are added to or deleted from the network configuration and the resources they have available. The protocol allows network elements to communicate resource information dynamically and directly. The protocol also allows direct exchange of network configuration information between network elements for determining wireless communications network paging areas.

Abstract: An apparatus having an interface connectable to a network. The interface may be configured to transmit information via a frame in the network. The frame may have a packet envelope carrying a plurality of packets. A first packet may have one or more labels configured to control routing of the first packet through the network and a payload to carry the information.

Abstract: A switching system for a data stream utilizing striping with a parity stripe, so if a fabric of the system fails, the data stream can still be reconstructed with the parity stripe. The system uses receive and transmit interfaces which implement space division, and fabrics which implement hybrid space/time division.

Abstract: A method for using network address translation in switches and routers to define a virtual host as the source of a multicast channel within a single-source multicast model and to translate packet addresses from different multicast sources so that the packets appear to be originating from the virtual host. Address-translated packets are thus forwarded through a single-source multicast channel and received by the subscribing host(s)/clients as though the packets came from a single “virtual” source. This methodology can be used to map two or more sources simultaneously onto the same multicast channel. Such a mapping is useful, for example, to present multiple views of a sporting event video broadcast, provide advertisement insertion capability, or to support transparent fail-over to a backup video source in a critical multicast application. Subscribing client hosts in the multicast reception group simply subscribe to the single virtual host as the source of a multicast channel.

Abstract: A method and system for providing a customer network with high speed access to a carrier network is provided. The system comprises an access device for providing a communication path for the customer network, a first concentrator device that is operable to establish a communication path with the carrier network, and a second concentrator device that is operable to establish a communication path with the carrier network. The access device is operable to receive data traffic from the customer network and to forward the data traffic within the system. The access device and the first concentrator device cooperate to form a first virtual channel for allowing data traffic to flow from the customer network to the carrier network and from the carrier network to the customer network and wherein the first virtual channel is the primary communication channel for the customer network.

Abstract: A module, and associated method, is engageable with a data terminal. The module includes a storage element for storing an identifier address, used to identify the origin of a packet of data. The module can be released out of positioning at a first data terminal and thereafter utilized at a second data terminal. Thereby, mobility of communications is increased as a user of successive data terminals can identify each successive data terminal with the same identifier.

Abstract: Base station generates a mobile station identifier which indicates a mobile station that a data signal is addressed thereto, and a head slot having a data signal when there is a data signal that has a length to be able to transmitted using one slot of a TDMA radio channel. When there is a data signal that has a length to be not able to transmitted using one slot, base station generates a head slot and continuous slots which contain at least a part of data signal. Base station transmits the head slot by using the starting slot which located at predetermined position every mobile station on the TDMA radio channel, and transmits the continuous slots by using slots which follow the starting slot. Mobile station receives the starting slot, and stops reception if the starting slot is not the head slot. If the starting slot is the head slot, the mobile station judges the mobile station identifier.

Abstract: The fractional E1 link device between a base station and a base station controller, in a link interface between the base station and the base station controller for a mobile communication system, includes: a clock converter for receiving a frame sync clock and a system clock, and converting the system clock to a clock corresponding to the number of subscribers; a processor in synchronism with the output clock of the clock converter, for interfacing transmission/reception data of the base station; a framer/transceiver in synchronism with the frame sync clock and the system clock, for framing the output data of the processor to specific time slots in conformity with a fractional E1 link, and transmitting data received on the fractional E1 link to the processor; and a multiplexer/demultiplexer for multiplexing data received from a different base station from that of the framer/transceiver, transmitting the multiplexed data on a E1/T1 link, demultiplexing data received on the E1/T1 link, and transmitting the demu

Abstract: A device that automatically configures the high speed (100 Mbps) port of a switch both physically and logically is provided. For physical configuration, the device determines the transmit pair conductor and the receive pair conductor interconnecting a switch port and Data Terminal Equipment (DTE). The switch port can be termed “Primary” while the connected DTE is termed “Secondary” or vice versa. For logical configurations, the device makes the determination. The device includes a switching relay, a controller and impedance matching transformers. The controller switches the connections between the relay and the transformer so that the impedance is substantially constant even though the output from the high speed port is feeding different resistive transmission lines.

Abstract: An Ethernet-to-ATM and ATM-to-Ethernet converter is coupled between an Ethernet physical layer and an ATM physical layer. In an Ethernet-to-ATM communication path, the converter includes a start frame delimiter unit coupled to an output of an Ethernet physical interface. The start frame delimiter unit is coupled to a first buffer and to a cell separation and threshold logic unit. The first buffer is in turn coupled to an ATM physical interface. Software in a personal computer can format a frame that is sent along the Ethernet-to-ATM communication path. The frame is prepared as an Ethernet-type frame with a data field having one or more cells formatted similarly to ATM cells. In an ATM-to-Ethernet communication path of the converter, a second buffer is coupled to the ATM physical interface. A preamble generation logic unit is coupled to the second buffer and to the Ethernet physical interface.

Abstract: A pipelined linecard architecture for receiving, modifying, switching, buffering, queuing and dequeuing packets for transmission in a communications network. The linecard has two paths: the receive path, which carries packets into the switch device from the network, and the transmit path, which carries packets from the switch to the network. In the receive path, received packets are processed and switched in an asynchronous, multi-stage pipeline utilizing programmable data structures for fast table lookup and linked list traversal. The pipelined switch operates on several packets in parallel while determining each packet's routing destination. Once that determination is made, each packet is modified to contain new routing information as well as additional header data to help speed it through the switch. Each packet is then buffered and enqueued for transmission over the switching fabric to the linecard attached to the proper destination port.

Abstract: A method for detecting a congestion state in an ATM network without modifying the ATM network. A transmitter-side endsystem sends. to a receiver-side endsystem an amount of transmission data transmitted to a logical connection in the ATM network. The receiver-side endsystem counts an actually received amount of reception data, and compares the amount of transmission data with the actually received amount of reception data to detect the congestion state. Instead of the amount of the transmission data, a notification of completion of transmission of a predetermined amount of data may be sent to the receiver-side endsystem. In this case, the predetermined amount is stored in advance in both the transmitter-side and receiver-side endsystems, and receiver-side endsystem compares the predetermined amount with the actually received amount of reception data to detect the congestion state until the notification is received after a previous notification.

Abstract: A wireless hybrid network consisting at least one satellite 118 and a plurality mobile ad hoc nodes 104. The nodes 104 are assumed to be clustered into mobile groups 102 within the footprint of the satellite 118, and the objective is to enable reliable communications between the various nodes 104. At least one relatively powerful gateway 110, also mobile, is deployed for each cluster 102 of nodes to facilitate communication with a LEO or GEO satellite 118. The environment is characterized by the presence of terrestrial barriers 100 or other severe channel impairments. One of the goals of the invention is to provide a mechanism by which a mobile gateway 112 can change its position or define its trajectory based on the position and loading of the nodes 104 in an ad hoc network, so as to optimize certain pre-defined performance criterion, such as power, overhead, throughput.

Abstract: A method for transmitting data frames with compressed headers in a multiprotocol data transmission network comprising at least one ingress node transmitting data to egress nodes. Each frame of data includes data bytes and a header which defines the transmission protocols.

Abstract: A switching node for transferring addressed packets in a network includes a plurality of input port modules, a plurality of output port modules and a switching fabric, including a packet meta-data processor and a packet switch. Each input port module, upon receiving a packet, buffers the packet and generates a meta-data packet identifying an output port module that is to transmit the packet and packet identifier information, and provides it to the packet meta-data processor. The packet meta-data processor processes the meta-data packets received from all of the input port modules in connection with operational status information to determine whether the packet should be passed or dropped. If to be dropped, the packet is dropped at the input, otherwise enqueued for the proper output port.

Abstract: Systems and techniques for communications wherein a data packet is transmitted over at least one time slot from a transmission site, a value is computed from an initial value and information, the initial value being a function of the number of time slots of the data packet transmission, the value and the information is transmitted from the transmission site, the transmitted value and the information is received at a receiving site, the value from the received information is recalculated, and the number of time slots of the data packet transmission is determined from the calculated and recalculated values.

Abstract: The present invention builds on the implications of variability in flow durations on the stability of load-sensitive routing. In accordance with an embodiment of the present invention, long-lived flows of packets are routed dynamically while short-lived flows are forwarded on pre-provisioned static paths. This hybrid approach can exploit flow-classification hardware at the edge of backbone networks and known techniques for flow-pinning, as well as basic insights from earlier work on QoS routing. This approach of separating short-lived and long-lived flows can dramatically improve the stability of dynamic routing.

Abstract: A variable rate transmission system transmits a variable rate data packet including an accompanying rate indication signal indicative of the transmission rate of the variable data packet. The data packet can be spread using a long pseudonoise (PN) code, the mask of which can be selected in accordance with the transmission rate of the variable rate data packet. A preamble, providing the transmission rate, can be punctured into an outgoing pilot signal. The rate indication signal can be encoded in accordance with a set of orthogonal functions that are part of the indication of the transmission rate of the data packet.

Abstract: A mobile terminal for communicating with a base station in a packet radio services network. The terminal has a processor for determining one of a plurality of channels for communication between the mobile terminal and the base station; for digitally coding speech to provide speech information; for assembling speech information into speech packets; and for generating channel allocation requests for a channel in which to send speech packets. A radio transmitter is provided for transmitting the requests and the packets to a base station in the network. A radio receiver receives identities of channels allocated by the base station for the mobile terminal to transmit on. The processor is responsive to each received channel allocation to determine that packets are sent on the allocated channel. In the GPRS since a channel is released when there is no packet to transmit, higher traffic levels can be obtained using the same number of radio channels.

Abstract: This document describes a way to extend Mobile IP Authentication Authorization and Accounting (AAA) signaling to enable a node to request from a network operator combinations of home and local service capabilities (when roaming) in an efficient and scalable manner. It also enables the home and foreign service providers to constrain and account for actual services provided based on a combination of the foreign and home operator policy.