Abstract: An information communication system which includes a master station and a plurality of slave stations and enables reduction of the processing time of the whole system. When transmitting a response signal to the master station, each slave station generates not only a time slot number but also a time delay number. If a slave station detects a transmission of a response signal by another slave station having been performed prior to the time of the determined time delay number within the same time slot, the slave station does not transmit the response signal.

Abstract: Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system). Each transmitter (e.g., each terminal) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level.

Abstract: A system and method for detecting communication requirements in a network and placing nodes in various stages of activity where conditions allow. The system and method provides an algorithm to detect changes in node activity levels and alter operations, such as update transmissions and route selections, based upon changes detected. In particular, the algorithm determines activity level at a node at each routing update interval based on factors such as a number of new destinations the node can reach, a number of route modifications that the node can implement, a number of routes from the node whose lengths have changed and a number of destinations the node can no longer reach. The node can then increase or decrease the rate that it exchanges its routing information with neighboring nodes based on an increase or decrease in this activity level.

Abstract: A method and system for controlling a plurality of pipes in a computer network, including at least one processor for a switch, the at least one processor having a queue, the plurality of pipes utilizing the queue for transmitting traffic through the switch, wherein each pipe is assigned a priority ranking class, each class has a unique priority rank with respect to each of the other classes, the ranks ranging from a highest priority rank to a lowest priority rank. A transmission probability is calculated for each pipe responsive to its priority rank. If excess bandwidth exists for the queue, the transmission probability of each pipe is linearly increased. Alternatively, if excess bandwidth does not exist, the transmission probability for each pipe is exponentially decreased. Packets are transferred from a pipe to the queue responsive to the pipe transmission probability and priority rank.

Abstract: Improved quality of service management for multiple connections between a sender and a receiver may be achieved by allocating a host-level transmission rate among the multiple connections based on a ratio of a weight associated with each connection and a sum of the weights associated the connections. Data packets associated with the connections may then be selectively transmitted to the receiver such that data packets having a highest difference between the allocated transmission rate and an actual transmission rate are transmitted first. The data packets transmitted to the sender may also be clocked using a transmission timer having period corresponding to the host-level transmission rate.

Abstract: A method and system for performing network address translations for a session in a network is disclosed. The network includes at least one local network domain, and the at least one local network domain includes at least one computer system. Each computer system has a local address and is associated with a global address. The session exchanges packets that travel between the computer system within the local network domain and another computer system which may be outside of the local network domain. Each packet includes source and destination information. The method and system include determining a direction of travel for each packet, inbound or outbound, by searching a global address table for a match of a key for each packet. The key is provided using a portion of the destination information. The global address table includes at least one entry. Each entry corresponds to the global address for a first corresponding computer system.

Abstract: In wireless communication arrangements that utilize a transmission period of time followed by a retransmission period of time, the utilization and effectiveness of retransmission communications can be advantageously increased by dynamically assigning desired communications to respective retransmission time slots of the retransmission period.

Abstract: In a multimedia call center (MMCC) operating through an operating system, a client-specific self-help wizard is provided for active clients and updated periodically with information related to client transaction history with the MMCC. A connected client is presented by the wizard with a selective media function through which the client may a select a media type for interaction and help, and the MMCC will then re-contact the client through the selected media. The client, for example, may select IP or COST telephony, and the MMCC will place a call to the client to a number or IP address listed for the client, and interactivity will then be through an interactive voice response unit. Help information specific to a client is updated in the client's wizard periodically according to ongoing transaction history with the MMCC. The wizard may also monitor client activity with the wizard and make reports available to various persons.

Abstract: Block forming method and apparatus of a digital bit stream, in which such an inconvenience that in spite of the fact that additional data regarding a partial packet to be located at the end of a main data portion exists in an additional data portion, the partial packet becomes a block in which no byte actually exists can be eliminated. When a space area smaller than one packet occurs in the end portion of the main data portion of the data block, partial data of the next packet is stored in the space area, the additional data of the next packet is stored in the additional data portion as additional data of one partial packet and the remaining data of the partial data of the next packet is stored in a start portion of the main data portion of a next data block.

Abstract: A method is described for sending frames of data from at least two sending nodes via one or more forwarding nodes to one receiving node in an ATM network. Each frame of data is partitioned into cells and includes a VPI field and a VCI field. The sending nodes include a first label into the VPI field of each of the cells representing an identification of the routing of the cell. Furthermore, the sending nodes include a second label into the VCI field of each of the cells representing an identification of the source of the cell. The forwarding node swaps the first and the second label according to a swapping table. With respect to the second label, the forwarding node enters the swapping table in the column of the output labels and reads the corresponding input label.

Abstract: In a high data rate communication system, a method and apparatus for improved throughput while transmitting data packets within multiple time slots. In order to avoid unnecessary retransmissions of a packet, a subscriber station sends a Stop-Repeat signal to a base station, causing the base station to cease further transmissions of the packet. In order to enable successful decoding of a packet, a subscriber station sends a Continue-Repeat signal to a base station, causing the base station to send retransmissions of the packet during time slots beyond a predetermined default number of time slots.

Abstract: A radio access network (20) comprises plural radio network controllers (24) including a first radio network controller. The plural radio network controllers are situated to establish one or more overlapping routing areas (URAs), each overlapping routing area comprising a cell controlled by the first radio network controller and at least one cell controlled by another of the plural radio network controllers. For signaling purposes over a signaling network (30), the first radio network controller need only store network addresses for: (1) any of the plural radio network controllers which controls a cell in any overlapping routing area; and, (2) any of the plural radio network controllers which functions as a serving radio network controller for a connection for which the first radio network controller functions as a drift radio network controller.

Abstract: The present invention involves the passing of clock information from a point where a tributary payload is mapped into a carrier to a point where a tributary payload is de-mapped from the carrier. A synchronization signal is generated at the mapping end. Rather than sending clock phase information implicitly by means of the data, as is normally the case, a value of the synchronization signal at a given time, is sent explicitly, independent from the payload data.

Abstract: A method and apparatus are disclosed for scheduling arriving data packets for input to a switch having a plurality of input channels, and a plurality of output channels, the scheduling method is performed in successive scheduling phases where each scheduling phase further comprises at least log N scheduling iterations. The method is a parallelized weight-driven input queued switch scheduling algorithm which possesses good bandwidth and delay properties, is stable, and can be configured to offer various delay and quality of service (QoS) guarantees. The scheduling method utilizes envelope scheduling techniques and considers partially filled envelopes for scheduling.

Abstract: A system and method establish an Internet protocol (IP) connection between an originating end-system and a limited access destination end-system through a switched transport network. An originating interworking function (IWF) device inserts its switched transport network address into a data field of an RSVP path message, which is forwarded through routers in an IP network by default routing, without modifying the data field. A destination IWF device retrieves the switched transport network address from the path message, which is forwarded to the destination end-system. The destination IWF device receives a new IP address assigned to the originating end-system by the destination end-system. The destination IWF device forwards a setup message to the originating IWF device, through switches in the switched transport network, based on the switched transport network address from the path message and the newly assigned IP address. The IP connection is established in response to the setup message.

Abstract: A code division multiple access communication system has a plurality of base stations. Each base station transmits a primary synchronization code (PSC) in a primary synchronization channel (PSCH). A user equipment monitors the PSCH and correlates the PSCH with the PSC. Using a result of the PSC correlation, PSCH locations are identified having a PSC peak. For each identified PSCH location, a quality factor comprising a shape factor associated with that location's PSC peak is determined. For each identified PSCH location, that identified PSCH location and the quality factor is stored. The PSCH locations and quality factors are accumulated over a number of frames and are processed using logic at algorithms to produce a reliable PSC detection.

Abstract: A cross point switch is configured to select from one of a first stream of ATM cells and a second stream of ATM cells, the first stream and the second stream being identical, and is further configured to select and substitute the second stream for the first stream upon detection of an error condition in the working circuitry operation on the first stream. The working circuitry, which is located on an interface module, is configured to receive and operate on the first stream of ATM cells. The protection circuitry, which is located on a redundant interface module, is configured to receive and operate on the second stream of cells. The protection circuitry and the working circuitry are functionally identical and synchronized to each other so that switching occurs from one stream to the other without interruption of network service.

Abstract: A network processor (12) for a voice over Internet protocol phone integrates a universal serial bus port (56), a pair of IEEE 802.3 MACs (70a), a repeater (70b), and a pair of pulse code modulation (PCM) ports (24) such that the network processor can be combined with other peripherals to transmit both voice and data over an Internet protocol network (13).

Abstract: A method and system for implementing weighted fair flow control on a metropolitan area network. Weighted fair flow control is implemented using a plurality of metro packet switches (MPS), each including a respective plurality of virtual queues and a respective plurality of per flow queues. Each MPS accepts data from a respective plurality of local input flows. Each local input flow has a respective quality of service (QoS) associated therewith. The data of the local input flows are queued using the per flow queues, with each input flow having its respective per flow queue. Each virtual queue maintains a track of the flow rate of its respective local input flow. Data is transmitted from the local input flows of each MPS across a communications channel of the network and the bandwidth of the communications channel is allocated in accordance with the QoS of each local input flow. The QoS is used to determine the rate of transmission of the local input flow from the per flow queue to the communications channel.

Abstract: A header conversion device allowing reduced amount of hardware and memory and high-speed line switching is disclosed. In an ATM switching device having redundant incoming line systems, a header conversion table stores a set of header conversion information for one of the redundant incoming line systems. A header converter converts the header of an ATM cell received from each of the redundant incoming line systems by referring the same set of header conversion information.