Abstract: A system and method for managing the data channel usage in a data over cable system having more than one data channel. The system includes network devices, which are cable modems connected in at least a downstream connection to one of the data channels in a cable network. The upstream connection to the cable modem may be to the cable network or to alternative networks such as, the public switched telephone network. During initialization, the cable modems attempt to communicate over a channel designated for it in the configuration parameters provided for the cable modems. If unable to use the channel, or if no channel has yet been defined for it, the cable modem scans the bandwidth for an available data channel. The cable modem may lock on the first found data channel. The cable modems register with the cable network and are assigned to a cluster. The user of a network administrator analyzes channel usage and moves cable modems to different channels in clusters.

Abstract: A method of operating a wireless network comprising a plurality of wireless terminals and optionally a base station uses a transmission frame (300) including an association section (310) for use by wireless terminals wishing to join the network. A variable number of association sections (310) is scheduled in response to operating characteristics such as the load on the network or the presence of a high security application on the network.

Abstract: A local multipoint distribution service base station apparatus for sending and receiving communication signals to and from subscribers includes a base unit having at least one rack which is adapted to receive at least one subrack. At least one communication signal generating unit is also arranged and configured to be received by the subrack. In addition, a transmitting/receiving unit is operationally connected to the base unit for transmitting and/or receiving the communication signals to and from the subscribers.

Abstract: A method and apparatus for providing data communication between a source station having multiple connections to a first switch and a destination station having multiple connections to a second switch. A trunk identifier to each port on the first switch and each port on the second switch. A data frame is encoded with the trunk identifier for an ingress port on the first switch. The data frame is sent to the second switch from the first switch. A list of egress ports for the destination station is obtained from a station list contained in the second switch. An egress port is selected from the list of egress ports based upon the source address, destination address and trunk identifier. The data frame is sent to the destination station through the selected egress port.

Abstract: A reception synchronization circuit for receiving a unique word transmitted in a predetermined digital pattern. A detection circuit detects the reception electric field intensity as received power. A UW correlation judgment circuit detects the unique word (hereinafter referred to as “UW”) and takes a correlation between the unique word thus detected and a predetermined digital pattern. A memory stores two or more threshold values for the movement average. After the two or more threshold values and the movement average are compared with each other, the correlation is taken by the UW correlation judgment circuit when the movement average is larger than the minimum values of the two or more threshold values.

Abstract: A telecommunications system (18) is provided that includes a first controller (20) and a second controller (22) coupled using a packet-switched network (32). The controllers provide a low cost means of coupling isochronous telecommunication devices. The first controller (20) receives one or more isochronous input channels from a common control shelf (24), such as a private branch exchange (PBX), over a circuit-switched network (27). The first controller (20) encapsulates an isochronous frames from the common control shelf (27) into a data frame that is transferrable over the packet-switched network (32). The second controller (22) is configured to receive the data frame and extract the isochronous frame, which is then transmitted to a peripheral shelf (26), such as a line trunk unit (LTU), using an isochronous circuit-switched network (38). The controllers contain identical functionality, permitting bi-directional transmission of data between the common control and peripheral shelves.

Abstract: An address memory structure used in an Ethernet switch, comprising an index memory and an address table memory is disclosed. The index memory is used for storing the vendor code section and the address table memory is used for storing the serial code section. The vendor code index data connects the index memory data to the address table memory data. When comparing the node addresses, the serial code section in the address table memory is compared first. If there is a consistent entry, the corresponding vendor code section is compared through the vendor code index data. When adding a new node address, the corresponding vendor code index data is attained, and the vendor code index data and the serial code of the node address are then written into the address table memory.

Abstract: A method of transmitting a cell between the ATM layer and the physical layer is provided for the ATM matching system, which includes the physical layer divided into a specified number of uniform physical device groups multiplexly polled by the ATM layer. The method comprises the steps of multiplexly polling the physical device groups by the ATM layer, transmitting an enable signal to the polled device upon receipt of a state signal from the physical layer, transmitting the cell to the physical layer, checking the multiplexed polling of the ATM layer by the physical layer, writing a physical port number into the cell with transmitting a state signal to the ATM layer upon receipt of the multiplexed polling, and transmitting the cell to the ATM layer upon receipt of an enable signal from the ATM layer.

Abstract: Bandwidth within a common wireless communication channel used by a number of independent computer networks is allocated by assigning a portion of the total bandwidth of the common wireless communication channel to intra-network communications in each of the independent computer networks. This bandwidth allocation scheme may, from time to time, involve revising existing bandwidth allocations for one or more of the independent computer networks, for example when new networks or new clients in existing networks request bandwidth within the channel. The intra-network communications may occur within a slotted link structure that includes transmission times for master and client devices of the respective network. These transmission times are preferably arranged within a hierarchy that includes transmission times for master and client devices of other networks that share the wireless communication channel.

Abstract: In a digital mobile communication system, a packet radio system has been implemented by employing the radio interface of the mobile communication network. The packet radio system comprises packet radio support nodes (SGSN) connected to the mobile communication network, as well as gateway support nodes for providing an inter-connection to an external packet data network (15). The support nodes (SGSN, GGSN) are connected to an intra-operator packet switched backbone network (13). The serving support nodes and the gateway support nodes collect charging information on usage of the radio interface and the data network (15), respectively. The system is further provided with a billing gateway support node (BGGSN) connected to the internal backbone network (BGGSN) to receive user-specific charging information collected by the other support nodes, and to forward the charging information to a charging system.

Abstract: Mobile hosts have a direct participation multicast group managing unit for managing a multicast group in which the mobile hosts participate in a form of conducting multicast communication directly from a network out of a plurality of networks in which the mobile hosts themselves currently exist, an indirect participation multicast group managing unit for managing a multicast group in which the mobile hosts participate in a form of conducting multicast communication through nodes for supporting communication with the mobile hosts themselves, and a control unit for transmitting a group report message constructed of only multicast groups managed by the direct participation multicast group managing unit when receiving the group inquiry message.

Abstract: A system and method are disclosed for transparently proxying a connection to a protected machine. The method includes monitoring a communication packet on a network at a proxy machine. The communication packet has a communication packet source address, a communication packet source port number, a communication packet destination address, and a communication packet destination port number. The proxy determines whether to intercept the communication packet based on whether the communication packet destination address and the communication packet destination port number correspond to a protected destination address and a protected destination port number stored in a proxy list. The proxy then determines whether to proxy a proxied connection associated with the communication packet based on the communication packet source address and the communication packet source port number. A protected connection is terminated from the proxy machine to a protected machine.

Abstract: Methods and apparatus for Fiber Channel interconnection is provided between a plurality of private loop devices through a Fiber Channel private loop device interconnect system. In the preferred embodiments, the Fiber Channel private loop device interconnect system is a fabric or an intelligent bridging hub. In one aspect of this invention, a Fiber Channel private loop device is connected to two or more Arbitrated Loops containing, or adapted to contain, one or more private loop devices. Preferably, the interconnect system includes a routing filter to filter incoming Arbitrated Loop physical addresses (ALPAs) to determine which Fiber Channel frames must attempt to be routed through the fabric. Numerous topologies of interconnect systems may be achieved.

Abstract: Improved reliability and reduced delays and packet losses of Internet media transmissions over packet switching networks such as Internet and Intranet is achieved by replicating a sent message/information packet(s) from one or more source computers connected to the network into two or more replicas of one or more of the packets of the sent message. Each of the replicas is then directed through a different route through the network to one or more destination computers. In one embodiment, each of the routes is determined so that the routes have the least number of routers and access points in common. Since the replicas are redundant, losses and delays of some of the replicas is not fatal to assemble the packet sequence at the destination(s). Thus, the destination computer can assemble the sent message/information packet from received replicas in a more complete and faster manner. Redundant replicas that are received can be ignored and/or discarded at the destination computer.

Abstract: Disclosed is a method for all-to-all personalized exchange for a class of multistage interconnecting networks (MINs). The method is based on a Latin square matrix corresponding to a set of admissible permutations of a multistage interconnecting network. Disclosed are first and second methods for constructing a Latin square matrix used in the personalized exchange technique. Also disclosed is a generic method for decomposing all-to-all personalized exchange patterns into admissible permutations to form the Latin square matrix for self-routing networks which are a subclass of the MINs.

Abstract: An asynchronous transfer mode (ATM) interface device includes a router/header conversion unit for adding a routing tag to the header of an input cell and converting the cell header into arbitrary virtual path identifier/virtual channel identifier (VPI/VCI), and a cell switching unit for routing the cell received from the router/header conversion unit according to the routing tag. The ATM interface device also includes a second header conversion unit for converting the cell header received from the cell switching unit into the output VPI/VCI corresponding to the arbitrary VPI/VCI, and a demultiplexing unit for transferring the cell from the second header converter to the output physical link corresponding to the output VPI/VCI.

Abstract: In a communication network having a plurality of terminals, such as packet forwarding apparatus, and a transport network which provides a connection between the terminals, when the transport network performs a state transition associated with a brief disconnection, a brief disconnection begin notification signal is sent to a terminal prior to a state transition operation and a brief disconnection end notification signal is sent to the terminal after the state transition operation. The terminal reroutes communication data to a storage or a redundant transport route during the period between the receipt of the brief disconnection begin notification and the receipt of the brief disconnection end notification. Accordingly, the communication data loss due to the brief disconnection between terminals associated with the state transition of the transport network can be reduced or eliminated.

Abstract: Active and spare circuit cards are each paired with switch cards. Each switch on the switch cards is daisy chained with prior and succeeding switches. A master controller senses a faulty circuit indication signal from each of the active circuit cards. When the faulty circuit indication signal indicates a fault on a particular active circuit card, the controller instructs the switch card that is paired with that circuit card to switch it out and switch in a spare circuit card.

Abstract: A serial interface circuit capable of converting a large volume of data into packets based on a predetermined standard for transmission and reception and capable of performing smooth transmission and reception processing, configured so that, in a reception operation, a request packet generation circuit generates a request packet and calculates the maximum length of data of the response packet with respect to the request packet transmitted and a transaction controller compares the maximum length of data maxpl with the remaining memory amount of the response use FIFO and, when the remaining memory amount is larger than the maximum length of data, transmits the request packet. When the remaining memory amount is smaller than the maximum length of data maxpl, the output of the request packet to the link core, that is, the transmission of the request packet to the other node, is temporarily suspended until the remaining memory amount becomes larger than the maximum length of data maxpl.

Abstract: A device for a radio-communication system, in particular for point-to-multipoint connections, includes components for a supplementary transmission of ATM cells and for dynamically assigning the transmission capacity as a function of the traffic intensity.