Abstract: A method for sharing internal excess bandwidth between output and input termination modules of a switching network including a switch core fabric (FC) via which a plurality of input termination modules (ITM1 to ITMn) communicate with a plurality of output termination modules (OTM1 to OTMm) through at least a point-to-point transmission channels considered as corresponding each to a virtual ingress-to-egress pipe (VIEP). Sharing of internal excess bandwidth is obtained by successive steps including a minimum bandwidth request calculation step, each request being transmitted to an output termination module for obtaining a minimum bandwidth grant in return. The minimum bandwidth request and grant related to an input termination module linked by an ingress-to-egress pipe to an output termination module are both calculated for a determined number K of relative administrative weights corresponding each to a different quality of service, with a different request and a corresponding grant for every weight.

Abstract: A method and protocol for providing direct, per-call address information exchange (216, 218) between two distinct IP media gateways, including establishment of a first termination point (128) in an originating media gateway (120), transferring address information for the first termination point (204, 206, 214) to a receiving media gateway (124), establishing (220) of a second termination point (130) in the receiving media gateway, and using the address information to establish direct communication between the first and second termination points.

Abstract: In accordance with the present invention, a portion of a packetized data stream is copied from a data network without interfering with the flow of the data in the network. A known test signal is then substituted for the information contained in each copied packet to prepare a pseudo-media packet stream. The known test signal is encoded and packetized using the same methods used for the copied data stream. The pseudo-media signal is then recovered from the pseudo-media stream using the same depacketizing and decoding methods to be used on the copied packetized data stream. The recovered signal is an accurate representation of the state of the media stream since it has gone through the same packetization/depacketization and encoding/decoding procedures and includes all of the same faults of the copied data stream. The subjective quality of the recovered signal is then measured providing an accurate measure of the subjective quality of the copied media stream.

Abstract: A technique for enhanced frequency domain equalization in an OFDM communication receiver enables derivation of a more accurate estimate of channel gain fluctuation by adding an additional frequency tone observation to the estimate. For example, the technique may involve estimation of an unknown, complex, channel-induced gain A based on observation of complex amplitude values for first and second preamble symbols transmitted in an OFDM frame, plus the complex amplitude value for a signal field in the OFDM frame. The enhanced frequency domain equalization technique may be especially useful in a network conforming to the IEEE 802.11a standard.

Abstract: The invention relates to a method and a device for digital data radiotransmission between a fixed station (1) and at least one mobile station (2, 3) at one or several carrier frequencies (F1, F2 . . . ), wherein the data is transmitted in several time slots (Z1, Z2 . . . ) according to the time-multiplex technique. A specific amount of time is required to change from one carrier frequency to another carrier frequency using a slow-hopping HF module. The data is transmitted in an active followed by an inactive time slot during which no data is transmitted and which is sufficient for the HF module to program the frequency for the following active time slot. According to the invention, an inactive time slot is shorter than an active time slot.

Abstract: A method for the exchange of data in messages between at least two users which are connected by a bus system, the messages containing the data being transmitted by the users via the bus system, and each user containing a predefinable and/or ascertainable timing mark; a first user, in a function as timer, controls the messages as a function of time in such a way that it repeatedly transmits a reference message, which contains time information of the first user, via the bus at a specifiable time interval, and if the timing mark of the second user is reached without a reference message of the first user reaching the second user, the at least second user takes over the function of timer by transmitting its own reference message with its own time information via the bus system.

Abstract: In a generic, end-to-end address resolution methodology, destination addresses in one format are translated into local addresses of different formats for purposes of routing calls across a plurality of interconnected networks which use different address formats. Translation of addresses is accomplished through either database query or by conversion algorithm. To facilitate routing across a particular network, the signaling message of the call is repacked with the local address as the routing address. The original destination address is preserved and carried transparently across that network. The signaling message is then repacked with the destination address as the routing address. Bi-level addressing schemes are supported, so that a network-level destination address and user-level destination address may both be carried transparently across a particular network.

Abstract: Determining a predetermined number of paths from a source node to a destination node in a network with nodes interconnected by links having metric values. A path between the source node and a current node is determined and expanded using selected links connected to the current node. The expanded paths are evaluated based on a value for a selected metric to determine those expanded paths having desirable selected metric values. The expanded paths with desirable selected metric values are evaluated to determine the path having the highest available bandwidth for all distinct segments.

Abstract: A method and apparatus is described which pertains to load sharing/trunking in a communication device used in unicast and/or multicasting interchange of information. A plurality of available ports in the interface cards of the device is identified. More than one port is selected to be configured as a Multi-Link Trunk (MLT) even through the ports may be located on different interface cards.

Abstract: A cell search determination circuit is provided which is capable of reducing misdetections in the identification of a scramble code number. A mobile station in W-CDMA cellular communications confirms a scramble code identified by cell search.

Abstract: A method and system for providing a path for a new flow between a source node and a destination node in a network is disclosed. The network has a plurality of nodes and a plurality of links between the nodes. The nodes include the source node and the destination node. Each of the links is capable of including a plurality of existing flows and has a capacity. Each of the existing flows has a minimum guaranteed bandwidth. The method and system include determining a benefit for each link of a portion of the plurality of links coupled with a node of the plurality of nodes. The benefit is determined based on the capacity of the link and the minimum guaranteed bandwidth for a portion of the plurality of existing flows that is through the link, the node being a part of the path. The method and system also include selecting a link of the portion of the plurality of links to be part of the path.

Abstract: A method for data transmission over first and second media that overlaps in frequency includes computing one or more time division multiple access (TDMA) time-slot channels to be shared between the first and second media for data transmission; allocating one or more time-slot channels to the first medium for data transmission; allocating one or more of the remaining time-slot channels to the second medium for data transmission; and instructing transceivers for the first and second media to communicate only in their allocated time-slot channels.

Abstract: The hybrid type telephony system capable of establishing a connection between conventional type telephone sets contained in an exchange unit and LAN type telephone sets contained in an IP network, the system comprising: a gateway circuit connected between the exchange unit and the IP network and performing voice data format conversion, and a central control unit connected to the LAN of the IP network for establishing a communication path to the exchange unit via a control bus, controlling switching of IP packets of the IP network, managing IP address information of the LAN type telephone sets and the gateway circuit via the LAN, and controlling connection between the LAN type telephone sets and connection between the LAN type telephone sets and the gateway circuit.

Abstract: Packets are scheduled for transmission over a communication link in a network, using a Largest Weighted Delay First (LWDF) scheduling policy. A delay measure Wi, i=1, 2, . . . N, is computed for each of N packets, each associated with a corresponding one of N data flows and located in a head position in a corresponding one of N data flow queues. The computed delay measures are then weighted using a set of positive weights ?1, ?2, . . . , ?N. The packet having the largest weighted delay Wi/?i associated therewith is then selected for transmission. In an embodiment configured to meet a quality of service (QoS) requirement specified in terms of a deadline Ti and an allowed deadline violation probability ?i, e.g., a requirement specified by P(Wi>Ti)??i, the weights ?i in the set of positive weights ?1, ?2, . . . , ?N may be given by ?i=?Ti/log ?i. The invention can also be used to meet other types of QoS requirements, including, e.g., requirements based on packet loss probabilities.

Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

Abstract: A transmitting device including an encoder for receiving an information bit stream in a frame and outputting an information symbol, a first parity symbol, and a second parity symbol by encoding each information bit. An interleaver sequentially arranges the information symbols and the first and second parity symbols by rows in an array with an integer number of rows and an integer number of columns. The interleaver further outputs a plurality of radio frames in a stream, by reading the symbols by going down each column, starting at the leftmost column and proceeding right. Each radio frame has a predetermined size. A demultiplexer demultiplexes the radio frames received from the interleaver into streams of information, first parity symbols, and second parity symbols. A rate matcher bypasses the stream of information symbols and punctures the streams of the first and second parity symbols for rate matching.

Abstract: A DC-offset eliminating circuit changes a coefficient ? for determining a DC-offset follow-up speed. The coefficient ? is changed to a smaller value or 0 in a case where a signal showing a detection that a reception is ceased, is received from a signal-end detecting circuit, or in a case where a signal for partly turning off the circuits for the reduction of power consumption is received from a control circuit, if the received frame is not destined for the receiver itself. The circuit remains the coefficient ? to a smaller value immediately after the reception is resumed. Additionally, the circuit returns the coefficient ? to the normal value in response to the reception of a signal showing that an alignment signal is detected immediately after a preamble portion. The circuit then reduces the DC-offset follow-up speed as much as possible at the time when the preamble portion is received, thereby avoiding the DC-offset deviation caused by the preamble patterns.

Abstract: The present invention pertains to an apparatus for manipulating ATM cells. The apparatus comprises a memory array in which an entire ATM cell can be read or written in one read or write cycle. The apparatus is also comprised of a mechanism for reading or writing the entire ATM cell from or into the memory array. The present invention pertains to a method for switching an ATM cell. The method comprises the steps of receiving the ATM cell at a first input port of a switch from the ATM network. Then there can be the step of storing the ATM cell in one clock cycle in a memory array of the switch. Next there is the step of reading the ATM cell in the memory array in one clock cycle. Next there is the step of transferring the ATM cell from the memory array to a first output port of the switch. Next there is the step of transmitting the ATM cell from the first output port to the ATM network. The present invention pertains to a switch for an ATM cell.

Abstract: The key of the invention is to introduce an interoperability device in a communication system which integrates an IEEE 802.11 transceiver and a Bluetooth transceiver. The device prevents that one transceiver is transmitting while the other is receiving, which would cause interference at the receiving transceiver. In addition, the device preferably prevents that both systems are transmitting at the same time to avoid interference at the receiving device(s). Optionally the device prohibits simultaneous reception of both transceivers. In that way the radio receiver can be shared between the devices, allowing a cheaper and smaller hardware design.

Abstract: A method and system are provided for the transmission and reception of an In-band On-channel (IBOC) FM-band digital audio broadcast (DAB) signal. The IBOC DAB signal is generated in the transmitter to substantially occupy the upper and lower sideband frequency regions in the RF emission mask for the conventional broadcast analog FM-band. Redundant source bit information is transmitted in both the upper and lower sidebands so that the loss of information in either one but not both sidebands due to large amounts of interference or distortion, caused by, for example, first-adjacent interference, does not deleteriously affect the IBOC DAB receiver performance. The system exhibits both frequency-diversity and time-diversity. The receiver determines which codeword bit estimate, corresponding to either upper or lower sideband signals, is less likely to be erroneous.