Abstract: A method and apparatus for establishing a requested communication session between two terminals (A, B) over a given physical channel, wherein the session requires the determination of session parameters before the session can be executed. It is determined (402) by means of at least one session key, whether any session parameters for a previous session between the terminals have been stored in the terminals. If so, the stored session parameters are retrieved (408), such that the requested session can be executed (410) based on the retrieved session parameters. In this way, delays involved with the establishment of sessions requiring the determination of parameters, e.g. in multimedia calls, can be reduced.

Abstract: A differential STBC transmitting/receiving apparatus in a multiple antenna system using eight or less transmit antennas is provided. In the differential STBC transmitting apparatus, a symbol mapper receives binary data and generates a number of symbols from the binary data, each symbol having a number of bits. A space-time block encoder generates an STBC by encoding the symbols. A differential processor differentially encodes the STBC through feedback and delay. A distribution matrix processor substitutes the differentially coded STBC into a distribution matrix preset according to the number of transmit antennas, and outputs the differential STBC code of the distribution matrix to the transmit antennas.

Abstract: An optical access network system capable of transmitting and receiving high-speed signals and which allows the number of subscribers to be increased without increasing the number of wavelengths used is provided. An optical line terminal and an optical network unit are joined via an optical fiber transmitting line, a star coupler, and a plurality of branching optical fiber transmitting lines. The optical line terminal and optical network unit are constituted comprising an optical processing section and an electrical processing section. The optical processing section comprises a light-emitting element and a light-receiving element.

Abstract: System and method for signaling control information in a multi-carrier communications system to transmit data. A preferred embodiment comprises demodulating a first carrier that is used for transmitting a control channel transmission, determining a second carrier that is used for transmitting a data channel transmission based upon the demodulated control channel transmission, and demodulating the second carrier to obtain the data channel transmission. Additionally, designs for multi-carrier receivers are provided.

Abstract: Wireless communications transceivers include a transmitter that is configured to selectively frequency shift and transmit portions of broadband information over multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the broadband information. A receiver also is configured to receive and selectively frequency shift portions of broadband information from multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the second broadband information. Broadband information thereby may be transmitted and received in a regulated communications environment, even though a given provider may only be assigned discontinuous frequency bands/segments, none of which is wide enough to carry the entire broadband information.

Abstract: A method of transmitting a control signal in a wireless communication system includes allocating a first sequence to spread a first control signal in a radio resource, allocating a second sequence to spread a second control signal in the radio resource, selecting one of the first control signal and the second control signal, generating a spread control signal by spreading the selected control signal, and transmitting the spread control signal in the radio resource, wherein the first sequence and the second sequence use different cyclic shifts of a base sequence.

Abstract: A network node may have a transmitter, a receiver and a controller. The controller may be configured to automatically and repeatedly cause the network node to cycle back and forth between transmitting information on a network with the transmitter and receiving information with the receiver from the network, wherein the lengths of at least some of the transmissions and receptions vary in accordance with a predetermined pattern.

Abstract: A base station configured to communicate with a mobile station includes a controlling-information transmitting unit and a receiving unit. The controlling-information transmitting unit is configured to transmit to the mobile station as a set of controlling information, an information set indicating an environment of a cell which is resided by the mobile station, or an information set indicating power of interference from surrounding cells, or an information set indicating a condition of propagation channel. The receiving unit is configured to receive a signal transmitted from the mobile station, based on said set of controlling information, via a variably-controlling process of a spreading factor and a number of chip repetitions.

Abstract: In a method for estimating a frequency deviation between a received spread-spectrum code signal and a local frequency signal, the received spread-spectrum code signal is despread using a local spread-spectrum code. The despread signal is integrated over a particular integration period. From at least two successively obtained integration values, a phase change value characteristic of the phase change between the two integration values is calculated. From this, the frequency deviation is determined.

Abstract: Disclosed are an apparatus and method for removing noise contained within a usable frequency band of a mobile communication terminal. The apparatus includes a multiplier for multiplying a main clock of the mobile communication terminal by a predetermined integer to generate a reference signal; a multiplexer for multiplexing parallel signals, the parallel signals being transmitted to a peripheral device inside the mobile communication terminal, using the reference signal, and converting the parallel signals into serial signals; a demultiplexer for demultiplexing the serial signals to convert the serial signals into parallel signals; and a frequency divider for recovering the reference signal of the serial signals transmitted from the demultiplexer into the main clock.

Abstract: A method and system is disclosed for triggered operation of a variable auxiliary pilot based on RF conditions. An access terminal operating in a wireless communication system may switch on its auxiliary pilot in response to receiving a first threshold number of power-up commands from a serving base station. Responsive to thereafter receiving each of a second threshold number of power-up commands, the access terminal may increment the gain of its auxiliary pilot while holding the gain of its primary pilot fixed. The access terminal thereby sets its auxiliary pilot gain independently of its primary pilot gain for a select number of power-control commands. The access terminal may respond to subsequent power-control commands by responsively adjusting the gain of it primary pilot, and linking the gain of its auxiliary pilot to the gain of its primary pilot. Upon receiving a third threshold number of power-down commands, the access terminal may switch off its auxiliary pilot.

Abstract: A communications device capable of simultaneously operating in a dual-band CDMA communications system having a cellular and a PCS CDMA communications systems and a dual-band GSM communications system having a GSM 900 and a GSM 1800 communications systems includes a radio signal transceiver module, a CDMA module, a GSM module, a first CDMA filtering unit, a second CDMA filtering unit, a first GSM filtering unit, and a second GSM filtering unit. The first CDMA filtering unit, the second CDMA filtering unit, the first GSM filtering unit, and the second GSM filtering unit are utilized for discarding signals in an overlapping frequency band between the dual-band CDMA and the dual-band GSM communications systems.

Abstract: The invention provides a Code Division Multiple Access (CDMA) receiver for sampling a received CDMA signal into a plurality of samples. The CDMA receiver comprises a sampling control module, a code generator, and a plurality of despreaders. The sampling control module delays the samples for a plurality of different delay lengths to obtain a plurality of delayed samples respectively corresponding to each of the delay lengths, and adjusts timing of a sampling trigger signal and a code generation trigger signal according to a sampling timing adjustment signal. The code generator generates a despreading code according to the code generation trigger signal. Each of the despreaders is configured for decimating the delayed samples corresponding to each delay lengths according to the sampling trigger signal to obtain a plurality of decimated delayed samples, and despreads the decimated delayed samples with the despreading code to obtain a plurality of output signals.

Abstract: Performing approximate diagonalization of a correlation metric by user permutation to improve Multiuser Detector (MUD) processing. The system reorders the entries in the S-Matrix in order to move the bit decisions closer together in the decision tree. In one embodiment the reordering is a sequential pairwise correlation.

Abstract: A cellular communication system and method supporting both a time division duplexing (TDD) scheme and a frequency division duplexing (FDD) scheme. The apparatus includes a plurality of mobile stations, at least three first fixed stations communicate with the mobile station based on the FDD scheme, the first fixed station defining respective macro cells that are contiguous and form a virtual cell, and a cluster including at least one second fixed station communicating with the mobile stations based on the TDD scheme, the second fixed station defining a micro cell in the virtual cell.

Abstract: An apparatus and method for adjusting transmission phasing in a point-to-point communication link is disclosed. The relative phases of the transmissions from each antenna are adjusted before transmission to give optimum gain when received by two or more antenna elements and a signal combining element. The signal includes a data component, consisting of a subset of the subcarriers modulated with the input data, which is common to transmissions from all antenna elements; and a phase reference component consisting of a subset of the subcarriers that are modulated with a predetermined phase. The signal combining element is operable to receive the components and extract phase information.

Abstract: A method and system for communicating satellite digital radio program information for multiple satellite channels is provided. The method includes the steps of providing multiple satellite signals, and providing multiple data frames in each of the satellite signals. The method also includes the steps of providing frame synchronization symbols in each of the data frames, such that the frame synchronization symbols occurring in the satellite signals do not overlap in time with each other. The method also includes the steps of providing multiple data slots within each of the data frames, and providing satellite program information in at least one of the data slots in each data frame. The multiple data slots are positioned within each data frame relative to the frame synchronization symbol of that data frame, such that the data slots containing satellite program information in the multiple satellite signals do not overlap in time with each other.

Abstract: A carrier sense multiple access method capable of improving throughput in a wireless network is disclosed. This method is implemented in a wireless network—for example, a wireless LAN (100)—having an AP (110) that is equipped with a multi-beam antenna (111) that forms a directional beam and that is capable of SDMA, and a STA (120, 130, 140) that communicate with the AP (110). With this method, the AP (110) allots the STA (120 to 140) to a beam group defined by a coverage area of the directional beam, according to the location of the STA (120 to 140). Then, the allocated STA (120 to 140) is assigned a signature signal for group identification, the signature signal being unique to the group.

Abstract: The present invention provides methods of improving GNSS receivers' satellite signal acquisition and TIFF performances by taking advantage of SBAS signals. Due to a SBAS satellite's geostationary position and typically strong signal, the SBAS satellite signal can be acquired more quickly than a GPS satellite signal. Once a SBAS satellite signal is acquired the Doppler frequency search uncertainty may be reduced for remaining GNSS satellites which are to be acquired. Furthermore, a satellite search list may be optimized to search for satellites close to the line of sight (LOS) of the SBAS satellite for which a signal has been acquired, in receiver “warm” and “hot” start modes. Moreover, since a SBAS signal sub-frame is only one second long, which is shorter than six seconds for a GPS signal sub-frame, synchronization of the SBAS signal sub-frame may be achieved faster than for GPS signals.

Abstract: A Virtual Device is described which is composed of at least one Open device, e.g. a PDA, laptop or mobile phone that can be programmed, at least one Closed device, e.g. a camcorder or digital camera with a closed inner structure, and a number of Primitive devices, e.g. a head-set or microphone. A middleware installed on one or more Open Devices or on an external server will act as an operation system getting the devices to cooperate as one Virtual Device.

Abstract: Techniques for scheduling measurements for cells in multiple (e.g., GSM and W-CDMA) wireless communication systems are described. GSM neighbor cells are categorized based on a number of states. The states are prioritized in a manner to achieve good performance. The GSM neighbor cells are thus assigned different priorities depending on their states. W-CDMA neighbor cells are prioritized relative to the states for GSM cells. All W-CDMA neighbor cells can be assigned the same state, given the same priority, and considered as “one” W-CDMA cell in the scheduling. A cell in the GSM or W-CDMA system is selected based on the priorities of the neighbor cells, and the selected cell is scheduled for measurement in the next available frame. The highest-ranking GSM or W-CDMA cell for each idle frame is thus granted use of that idle frame for measurement.

Abstract: At a base station receiver in a CDMA wireless communications system, in order to reduce reliance on the parameter values transmitted on a packet data control channel (PDCCH) to properly detect the high speed packet data transmitted on a packet data channel (PDCH) with which the PDCCH is code-division-multiplexed, data detection is performed using different possible values for at least one of the parameters and determining if a data packet derived from the PDCH detected under the different values produces a detected data packet that passes a CRC check. If a data packet derived from the received PDCH using a possible parameter value passes the CRC check, then the data packet is delivered to the output and an ACK is transmitted back to the transmitting mobile terminal.

Abstract: A channel estimation circuit (12) of an individual CH path demodulation unit (1A-1L) performs a channel estimation from an individual CH. A channel estimation value correction circuit (22) of a shared CH path demodulation unit (2A-2L) then corrects a reception power fluctuation due to uplink transmission power control which is caused by the timing offset between the individual CH and the shared CH. The resultant data is used for the demodulation by a shared CH demodulation circuit (23).

Abstract: With the object of efficiently transmitting a variety of different information signals by utilizing the multi-carrier characteristics of Multi-carrier/DS-CDMA, the present invention is characterized in that, when, in an uplink transmission from a plurality of mobile stations to a base station, the mobile stations transmit a preamble to the base station before transmitting an information symbol sequence, the mobile stations individually select a carrier from among a plurality of carriers, and, up until receiving a preamble receipt confirmation signal from the base station with a prescribed maximum number of preamble transmissions serving as an upper limit number; the mobile stations repeatedly transmit a preamble by means of the selected carrier and vary the transmission power used for the transmissions of each carrier.

Abstract: A cargo, containerized cargo, high value asset monitoring and tracking communication system including a local area network (LAN) transmitter that transmits a first message having a first frequency spectrum, and a wide area network (WAN) uplink device that receives the first message from the local area network radio transmitter, whereby both WAN and LAN share the same spectrum. Further, the WAN uplink device transmits a second message having a second frequency spectrum overlapping the first frequency spectrum to a WAN receiver using an orbital satellite. At least one of the LAN transmitter and the WAN uplink device transmits with a transmission characteristic different from a transmission characteristic of the other. A communication device and method include similar features.

Abstract: A method of obtaining a relative indicator for use in scheduling uplink transmissions from a plurality of source user equipments to a base station is disclosed. The relative indicator indicates the status of a user equipment in comparison to the status of the other user equipments, therefore allowing a user equipment to make more efficient scheduling decisions. The method comprises the steps of determining, for each user equipment, a first indicator which is indicative of a status of that user equipment, determining at least one second indicator from the first indicators obtained for all user equipments and broadcasting the or each second indicator to all user equipments. In this way, a significant reduction the downlink signaling load can be achieved.

Abstract: A system and method for improving efficiency of satellite communications is described. In one embodiment, multiple return links are associated with a single forward link to reduce communications costs.

Abstract: A method of wired connection measuring the standby time of a CDMA mobile terminal, connects the CDMA mobile terminal with network emulator, and places them in the network test environment, then measures the standby current, voltage and electric quantity at standby time of the mobile terminal, thereby calculates the standby time of the mobile terminal. This method needs low test environment, and testing is simple and rapidly.

Abstract: A method for allocating a physical hybrid ARQ indicator channel (PHICH) includes allocating a CDM group according to a cyclic prefix type in consideration of a ratio of the numbers of necessary CDM groups according to spreading factors, and allocating a PHICH to the allocated CDM group. The PHICH includes an ACK/NACK signal multiplexed by code division multiplexing (CDM). Therefore, resources for PHICH transmission are efficiently allocated and a transmission structure can be maintained irrespective of a spreading factor.

Abstract: A inter-station transmission method of extending time allocated for a transmission path delay of an inter-station transmission path within a predetermined turnaround time, and increasing an inter-station transmission distance. A radio base station reproduces a clock synchronized with a BSU transmission clock DCLK used when transmitting downlink transmission data from a communication control station. The radio base station processes the downlink transmission data. The clock synchronization eliminates a necessity of data format conversion between the communication control station and the radio base station, a buffer accumulating transmission data in preparation for the conversion is not necessary. This reduces a turnaround time of a mobile communication system.

Abstract: Methods and apparatus enable a femto radio base station (28f) to be connected to an appropriate radio network controller node (26) of a radio access network (24) for use as an active radio network controller node for the femto radio base station. The connection is accomplished the femto radio base station (28f) preparing a node address inquiry and for using the node address inquiry for obtaining an internet protocol (IP) address of an appropriate radio network controller node. The femto radio base station (28f) further uses the internet protocol (IP) address of an appropriate radio network controller node for connecting to the appropriate radio network controller node as its active radio network controller node.

Abstract: A method and apparatus for changing a Transmit Time Interval (TTI) based on a Hybrid Automatic Repeat Request (HARQ) process in a code division multiple access (CDMA) communication system that supports a packet data service through an Enhanced Uplink Dedicated transport Channel (E-DCH). According to the method and apparatus, a data transmission/reception is performed in a manner that a TTI change signal is received, the actual time point of TTI change is calculated based on the TTI change signal and the HARQ process of the previous TTI, and the TTI is changed at the calculated time point of TTI change.

Abstract: A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.

Abstract: A system and method for efficient transmission of electronic information comprises providing a controller 10 being capable of receiving and transmitting electronic information, providing a plurality of access points 20, each access point having a plurality of receivers 30 capable of receiving electronic information, one of said plurality of receivers being designated a primary receiver 40, the rest being designated secondary receivers 50.

Abstract: A method for removing selected signals from a received signal prior to decoding begins by receiving communication signals from a transmitter over a CDMA air interface. The received communication signals are input to a traffic signal cancellation system for canceling unwanted traffic signals, thereby producing an output (O). The received communication signals are input to a pilot signal cancellation system for removing a global pilot signal, thereby producing an output (Oadd). The output (Oadd) of the pilot signal cancellation system is subtracted from the output (O) of the traffic signal cancellation system to provide a cancellation system output.

Abstract: Disclosed are a method, information processing system and wireless communications device for suppressing interference. The method includes receiving a transmission from each of a target (104) and interfering device (106). A set of pilot sequences (604) for an interfering device (106) and the target device (104) are determined. A channel estimate (608) for the target device (104) and the interfering device (106) is determined. A set of combining weights (610) associated with each pilot sequence for the interfering device (106) is determined as a function of the determined channel estimates (608) of the target device (104) and the interfering device (106). At least one pilot symbol estimate (612) for each pilot sequence in the set of pilot sequences for the interfering device is determined as a function of the received transmission and the determined set of combining weights (610).

Abstract: GERAN Cell Capability indicated in a bit of an Information Element is modified to indicate whether a neighbor GERAN cell belonging to a radio access technology (GSM) supports packet switched (PS) handover or not so that the serving radio network controller can be in possession of such information before deciding whether to attempt PS handover to the cell of the GSM network and thereby avoid unnecessary signaling in case such a handover is not possible and to thereby allow the serving radio network controller to consider some other target cell or some other solution than triggering PS handover toward that GSM cell.

Abstract: The present invention provides for a method of receiving a signal spread over a frequency range, and in particular a direct sequence spread spectrum signals including the step of employing a Fast Fourier Transform (FFT) in the Doppler search. In particular, the invention relates to the receipt of spread spectrum signals such as those transmitted as part of a GPS system.

Abstract: A method for scheduling transmissions to a plurality of users in a communication network determines a satisfaction metric and a dissatisfaction metric for each user in a given timeslot that is to be used for a next scheduled transmission to one of the users. Each user is assigned a weight based on a value of at least one of the user's satisfaction metric, the user's dissatisfaction metric and a rate requested by the user. The use having the highest weight is selected to be served the next scheduled transmission in the given timeslot.

Abstract: An apparatus and method for adjusting a desired expression section according to input bit values in a mobile communication system that expresses only a defined partial section of the input bit values in order to make the number of output bits be less than the number of the input bits, and maps bit values included in unexpressed sections to a specific value is provided. In the apparatus and method, a measurer divides possible output bit values into at least three sections, and measures output frequencies of output bits for the respective sections for a predetermined time. A controller adjusts the desired expression section, when an output frequency for a specific section is greater than output frequencies for other sections.

Abstract: Methods and apparatuses for generating an OVSF code are disclosed. A proposed method for generating a current code chip of an OVSF code includes: determining a correlation factor between the current code chip and a preceding code chip of the OVSF code; and generating the current code chip according to the preceding code chip and the correlation factor.

Abstract: Methods and systems for implementing trunking techniques in CDMA systems for handling group calls and push-to-talk services and roaming of group calls.

Abstract: A proposed spread spectrum signal receiver includes a radio front-end unit and a processing unit. The radio front-end unit, in turn, has an antenna, a digitizing circuit and a primary buffer unit. The antenna is adapted to receive radio signals (SHF) from a plurality of signal sources, and the digitizing circuit is adapted to downconvert and filter the received signals (SHF), and generate sample values (SBP-D) thereof. The primary buffer unit is adapted to temporarily store the sample values (SBP-D) from the digitizing circuit and allow the processing unit to read out a first set of stored sample values (SBP-D) contemporaneously with the storing of a second set of sample values (SBP-D) in the primary buffer unit. The processing unit is adapted to receive the sample values (SBP-D) from the primary buffer unit, and based thereon, produce position/time related data (DPT).

Abstract: A method and apparatus for maximizing the use of available capacity in a communication system having a base station and a plurality of mobile stations. The forward link includes a plurality of traffic streams sent on at least one channel from the base station to the mobile stations. The forward link is subject to a maximum power ceiling. A first output power level associated with simultaneously transmitting a first set of one or more traffic streams on the forward link is initially determined. Next, the first output power level is compared to the maximum power ceiling; and at least one time frame in the forward link having available capacity for transmitting a portion of at least one further traffic stream is identified. The first set of traffic streams and the portion of the at least one further traffic stream are then transmitted simultaneously during the at least one frame on the forward link.

Abstract: Method and apparatus for determining a transmission configuration for a dedicated channel in a wireless communication system. In one embodiment, an optimum configuration is determined based on minimizing Peak-to-Average Ratio (PAR) of the channel. The configuration is defined as a transmission pair of transmission branch and spreading code. The transmission branch may be the In-Phase (I) branch or the Quadrature (Q) branch. PAR analysis may be performed off-line to determine the optimum configuration. In operation, if the spreading code of the optimum configuration is used by another channel, the next best optimum code is used.

Abstract: A wireless telecommunication device, a method of frequency calibrating a wireless telecommunication device, and a computer program are provided. The method comprises: receiving a reference radio signal of the wireless telecommunications system; frequency synchronizing the wireless telecommunication device with the reference radio signal by adjusting a control parameter controlling a reference frequency generated by a reference frequency generator; measuring a temperature parameter characterizing the temperature of the reference frequency generator; and generating calibration information for calibrating the wireless telecommunication device on the basis of the control parameter and the temperature parameter.

Abstract: Multipath components of signals transmitted through time-varying digital radio channels are received with individual delays, and signals through a given channel comprise a code identifying that channel. A delay profile indicating a magnitude (Y) for delay values in a search window is calculated repetitively for known channels; the delays of multipath components for known channels estimated; a signal strength indicator calculated; and a search for new multipath components not already estimated performed at regular time intervals. When a new multipath component is found, its identification code is compared to the codes of the known channels. If the code of the new component is identical to the code of a known channel, a delay profile and a signal strength indicator is calculated for a window transposed to include the new multipath component. In this way as many multipath components as possible are included in the search window for a new cell.

Abstract: A radio terminal switches between a compressed transmission mode and a normal transmission mode based on the current transmit power level of the radio terminal. The radio terminal periodically compares its current transmit power level to a power threshold. The radio terminal transmits in the compressed transmission mode when the current transmit power level is below the threshold, and transmits in the normal transmission mode when the current transmission power level is greater than the threshold. The radio terminal may also operate in a compressed receiving mode.

Abstract: A craft-mounted repeater system processes signal properties (e.g., signal strength) between terrestrial (ground-based) wireless networks and mobile users that are aboard crafts (e.g., airplanes and/or ships) equipped to allow the user's mobile communications device to communicate at departure and at arrival of the craft. An onboard craft-mounted non-translating in-band only repeater system is a provided that increases the terrestrial mobile network signal levels inside the aircraft or ship to allow passengers to communicate with a terrestrial cellular communications system.

Abstract: Methods and apparatuses for acquiring and demodulating a data stream transmitted in a communication system. A method in accordance with the present invention comprises finding a boundary of a physical layer frame (PLFrame) in the data stream, finding a first 26 bits of a Unique Word (UW) associated with the data stream, finding a scrambling code utilizing the UW, and using a decoding procedure to determine a modulation type and code rate used for desired signals within the data stream.