Abstract: A method is disclosed for creating and storing troubleshooting information for diagnosing one or more problems experienced in one or more completed voice calls that are carried by a packet-switched data network. After completion of a voice-over IP call, for example, first information representing a Layer 3 path of a packet flow of a completed call that has passed through the data network is created and stored. Second information representing a Layer 2 path of a packet flow of a completed call that has passed through the data network is also created and stored. From a phone call detail record database, one or more selected phone call detail records are retrieved, which are associated with the completed call from a database of phone call detail records for a large plurality of completed calls. Thus, the likely path of a troubled call is determined, and phone call detail records associated with key points in the path are located.

Abstract: A method of providing wireless Internet service in a gateway system having a conversation function according to short messages includes storing and managing the latest URL web contents in a URL memory using the TTL, expire time and last modification time for URL web contents. Web contents corresponding to URL information requested by a mobile terminal are parsed and stored in a cache, and then transmitted to the mobile terminal through I-SMSC. The service method stores and manages the latest URL web contents in the URL memory using the TTL, expire time and last modification time for URL web contents to directly access the Internet. Thus, the service method provides the URL web contents to the mobile terminal when there is a request for URL information from a mobile terminal supporting no WAP standard for URL information which does not exist in the URL memory.

Abstract: An improved technique reduces unnecessary routing area updates, while ensuring that the location of a mobile terminal is known when the mobile terminal starts data communication after being in a standby state. Routing area updates are controlled in a packet radio access network architecture having a common routing area controlled by a core network and supported by a first wireless access system and a second wireless access system. The first radio access system provides a mode of operation in which a radio link is maintained between a mobile terminal and the first radio access system after completion of a data transmission. A routing area update takes place if the mobile is located in the second radio access system routing area when the next data transmission is initiated.

Abstract: A cell buffer use rate monitoring method allowing a memory required for detecting the currently used amount of a cell buffer to be reduced. A monitoring time and a plurality of cell buffer thresholds are previously set in a setting data memory. A cell buffer use rate is calculated based on the number of cells received within the monitoring time and the number of times a currently used cell buffer amount has exceeded each of the cell buffer thresholds.

Abstract: A method and apparatus for pre-establishing and managing Switched Virtual Circuits (SVCs) and Switch Cross-Connects (XCs) to support rapid setup of real-time services in Asynchronous Transfer Mode (ATM) networks are described. SVCs and XCs are pre-established and cached in accordance with communications application-specific rules and maintenance algorithms for each destination and service characteristics in the backbone network. The intelligent management of cached SVCs and XCs permits the backbone network to meet the tight delay budget of delay-sensitive communication applications. With proper management of cached resources, connection setup can be rapidly effected even during periods of high demand. The advantage is a connection setup mechanism having adequate granularity to ensure both efficient network usage and rapid response to service requests.

Abstract: A network node includes a serial physical sublayer (PHY) chip, a parallel PHY chip, and a media access control (MAC) chip. The serial physical sublayer chip, includes a single bit transmit data input, a single bit receive data output, and serial PHY control signal input/output (I/O) lines. The parallel PHY chip includes a multi-bit transmit data input, a multi-bit receive data output, and parallel PHY control signal I/O lines. The MAC chip includes a multi-bit transmit data output, a multi-bit receive data input and parallel control signal I/O lines. The multi-bit transmit data output is connected to the multi-bit transmit data input. One bit of the multi-bit transmit data output is connected to the single bit transmit data input. The multi-bit receive data input is connected to the multi-bit receive data output. One bit of the multi-bit receive data input is connected to the single bit receive data output. The parallel control signal I/O lines are connected to the parallel PHY control signal I/O lines.

Abstract: There is provided a method for assigning a pilot PN(PseudoNoise) offset to a base station in a digital mobile telecommunications system. In the pilot PN offset assigning method, a single cluster is divided into a plurality of subclusters, and a plurality of general base stations and reserved base stations, each having a plurality of sectors, are arranged in each of the subclusters.

Abstract: In a telecommunications network that employs a CDMA scheme, the amplitude associated with each independent CDMA carrier is digitally limited, thereby limiting the peak-to-average power ratio. This, in turn, is accomplished by measuring the instantaneous amplitude for the in-phase and quadrature signals that make up each CDMA carrier, deriving a maximum amplitude based on the instantaneous amplitude measurements, and then deriving one or more scaling factors based, in-part, on maximum amplitude. The one or more scaling factors are then applied to the in-phase and quadrature signals, which are subsequently filtered, combined and modulated by a corresponding CDMA carrier frequency.

Abstract: A method is disclosed for operating a mobile station (10). The method includes a first step of receiving a message from a base station (30), the message being descriptive of an assigned forward digital channel and including an information element that specifies an order of occurrence of time slot synchronizing word sequences within a frame. A next step receives a forward channel from the base station, the forward channel being transmitted to contain repeating frames each having N time slots, individual ones of the time slots including a synchronization word. A further step correlates the received forward channel in accordance with the received information element so as to obtain a plurality of frame synchronization indications within one frame, thereby decreasing the frame synchronization time.

Abstract: A method and apparatus for inserting sequence number and timestamp information into a network data packet in a manner which is checksum neutral with respect to a checksum precalculated in the network protocol portion of the data packet. The checksum neutral addition of sequence number and timestamp is accomplished by in addition to adding to the payload portion a sequence number and timestamp, also adding a value which is a modified version of the sequence number and of the time stamp such as an inverse value.

Abstract: An adapter is provided with intelligence that allows it to separate the header parts of a packet being received from the payload it carries, and in most cases move the payload directly into a destination buffer at the application layer or file system layer. Copies by the intermediate layers of the protocol stack are bypassed, reducing the number of times that the payload of a communication must be copied by the host system. At the network interface, a plurality of packets is received, and the payload of each is bypassed directly into the target destination buffer. The network interface device identifies the packets which are in the sequence of packets carrying payload to be stored in the target buffer by the flow specification carried with such packets. Also, the packets carrying data payload for the file include a sequence number or other identifier by which the network interface is able to determine the offset within the target buffer to which the packet is to be stored.

Abstract: The present invention relates to a parallel combinatory CDMA (PC-CDMA) system that transmits and receives data by applying a predetermined pseudo number (PN) code corresponding to a plurality of bits, and more particularly relates to a multi-carrier PC-CDMA system, enhancing its efficiency by mixing the PN codes corresponding to the plurality of bits with respective orthogonal frequencies. The transmitting part includes a plurality of mixers 331 to 33n for mixing respective PN codes outputted from a plurality of mappers 321 to 32n with frequency signals having an orthogonal feature and a receiving part including a plurality of mixers 411 to 41n for mixing received signals with the same frequency signals mixed at the transmitting part. Accordingly, it is possible to decrease the number of PN codes needed in a PC-CDMA system by correlating the mappers 321 to 32n of the transmitting part and correlator 421 to 42n and data detectors 431 to 43n of the receiving part through the mixers 33 and 41 independently.

Abstract: A multi node network communications protocol which provides high information throughput at high efficiency, while also maximizing low probability of detection and interception characteristics by optimizing use of transmitting power and other characteristics including but not limited to modulation method, FEC rate and spread spectrum processing gain. The network is optimized by dividing into sub-networks and optimizing the sub-networks to consider local conditions, thus optimizing the overall network to a level of efficiency not possible from a central control point. A protocol which periodically adapts to changing conditions and allows silent entry and exit of nodes as well as providing locations of all nodes within the network.

Abstract: A technique for implementing a sublayer of a protocol suitable for data transfer in a multichannel environment where each channel is assumed to be prone to a significant bit error rate such as in a wireless communication system. The invention may be used to provide a high speed data transfer such as at 128 kilobits per second or higher with a bit error rate of 10−6 or better using multiple channels. By keeping track of the number of frames received in error, the sender dynamically adjusts the subframe size for each channel to optimize the effective overall throughput. The subframes each carry preferably two types of sequence numbers including a position number related to an index into a larger frame to be transmitted as a single data entity. The second sequence number is related to the subchannel used so that the receiver can detect missing subframes.

Abstract: A data communication protocol is implemented to control data flow between a transport layer and a data link layer. The protocol provides two manners of data flow control. (1) In the first control manner, when the occupancy of packet buffers of the data link layer is smaller than a first threshold, the data link layer informs of the transport layer that the packet transport should be suspended, and thereafter when the occupancy is smaller than a second threshold smaller than the first one, the data link layer requests the transport layer to resume the packet transfer. (2) In the second control manner, when the amount of packets is smaller than a value determined based on the transfer rate and maximum burst size, the transport layer transfers a packet to a lower layer, and when the packet amount is larger than the value, a packet is transferred after a predetermined time passes to control the transfer rate to a predetermined one.

Abstract: A receiving circuit of a cellular telephone set comprises an intermediate frequency amplifier including an amplifying transistor shared for use in both code division multiple access mode and frequency division multiple access mode. A collector bias current of the transistor is switched to a large current in the code division multiple access mode and to a small current in the frequency division multiple access mode.

Abstract: A wireless telecommunications system is disclosed that mitigates multipath fading through an improvement in transmit diversity. Furthermore, embodiments of the present invention are well-suited for use with all forward channel multiplexing schemes (e.g., frequency-division multiplexing, time-division multiplexing, code-division multiplexing, etc.) and all modulation techniques (e.g., amplitude modulation, frequency modulation, phase modulation, etc.). An illustrative embodiment of the present invention comprises: a signal inverter for inverting and alternately not-inverting a first signal in accordance with a schedule to create a second signal; a first antenna for transmitting the first signal; and a second antenna for transmitting the second signal.

Abstract: There is disclosed, for use in a processing network containing a first node operable to transmit and receive frame relay data and a second node operable to transmit and receive asynchronous transfer mode (ATM) data, a network interface for converting the frame relay data to ATM data comprising: 1) a frame relay interface circuit operable to receive the frame relay data from the first node; 2) an ATM interface circuit operable to transmit the ATM data to the second node; 3) a data bus for coupling the frame relay interface circuit and the ATM interface circuit, the data bus operable to transfer frame payload data from the frame relay interface circuit to the ATM interface circuit; 4) a data traffic controller operable to receive frame header data from the frame relay interface circuit and control transfers of the frame payload data from the frame relay interface circuit to the ATM interface circuit; and 5) a bridge for coupling the data traffic controller to the data bus, the bridge isolating the data traffic

Abstract: A translation table apparatus used to perform both forward and backward bitmap vector translations. The translation table is used with bit vectors where it is desired to displace one or more bits to different bit positions in accordance with a configurable bitmap translation table. The translation of one bit vector to another is performed in real time and any number of bits can be moved simultaneously. In addition, both the bit vectors and the contents of the translation table can be changed on the fly. Translations are performed on multiple bits simultaneously wherein several bits can be displaced at the same time in accordance with the translation table. The same hardware used to implement the translation table is used for backward translations as well.

Abstract: A startup protocol is provided for use in a communications system having a plurality of transceivers, one transceiver acting as a master and another transceiver acting as a slave, each transceiver having a noise reduction system, a timing recovery system and at least one equalizer. The operation of the startup protocol is partitioned into three stages. During the first stage the timing recovery system and the equalizer of the slave are trained and the noise reduction system of the master is trained. During the second stage the timing recovery system of the master is trained in both frequency and phase, the equalizer of the master is trained and the noise reduction system of the slave is trained. During the third stage the noise reduction system of the master is retrained, the timing recovery system of the master is retrained in phase and the timing recovery system of the slave is retrained in both frequency and phase.