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Multiple access (e.g., TDMA)

Subclass of:

370 - Multiplex communications

370310000 - COMMUNICATION OVER FREE SPACE

370345000 - Combining or distributing information via time channels

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Class / Patent application numberDescriptionNumber of patent applications / Date published
370348000 Channel reservation scheme 20
Entries
DocumentTitleDate
20080205373Method to determine timeslot duration in a TDMA-based MAC protocol for VOIP over wireless - What is described is an approach to assigning timeslots of appropriate duration when using a TDMA based MAC protocol for forwarding VOIP traffic. It is known that a typical user speaks only 35% of the time in a voice session. Existing VOIP systems exploit this fact and reduce the amount of data generated by employing Voice Activity Detection (VAD) algorithms. The packets generated when a user is silent are shorter than the packets generated when a user is speaking. Hence there is a need to assign timeslots of different duration based on user speech activity. When the user is speaking we assign an Active Speech Timeslot (AST). When the user is listening a Silent Speech Timeslot (SST) that is long enough to transmit packets generated by a Comfort Noise Generator is assigned.08-28-2008
20120163366WIRELESS DEVICE HAVING FAST-RECEIVE MODE FOR MEASURING RECEIVED SIGNAL STRENGTH (RSSI) FOR HIGHER TIME DIVISION MULTIPLE ACCESS (TDMA) MULTISLOT CLASSES - A wireless communications device having a fast-receive mode for measuring received signal strength indication (RSSI) enables the device to handle higher time division multiple access (TDMA) multislot classes without requiring that the device include either a second receiver or a receiver with a more advanced and expensive phase-locked loop (PLL) design. The time to complete an RSSI measurement is reduced by initiating the sampling of signal strength before the radio transceiver is fully stabilized in the downlink mode. By initiating sampling before PLL stabilization is complete, the overall time to complete an RSSI measurement is reduced sufficiently to enable scheduling of an RSSI measurement in each GSM frame.06-28-2012
20090175258METHOD AND DEVICE OF GENERATING TIME-VARYING PREAMBLE SEQUENCE AND PSEUDORANDOM NOISE (PN) BINARY SEQUENCE IN DIRECT SEQUENCE SPREAD SPECTRUM (DSSS) COMMUNICATIONS - Embodiments of the disclosure provide methods, apparatus, and articles allowing two nodes to communicate in a slot-based direct sequencing spreading communication system. Both a preamble sequence and a payload data spreading PN sequence are generated from the Time of Day and a given user code. Generated sequences are synchronized between two communicating nodes to allow slot-based DSSS communication to take place. Generated sequences also change dynamically from slot to slot to provide waveform security.07-09-2009
20100040041SWITCHING ROLE OF APPARATUSES BETWEEN CONTROLLER (HOST) AND PARTICIPANT (DEVICE) TO SCHEDULE BI-DIRECTIONAL DATA - A method involving: sending from a first apparatus to a second apparatus a first message identifying the first apparatus and a second message scheduling a time period for reply; receiving at the first apparatus during the time period scheduled by the second message a third message sent by the second apparatus; and in response to receiving the third message, changing a role of the first apparatus so that it is operable to schedule bi-directional data transfer between the first apparatus and the second apparatus.02-18-2010
20100040040WIRELESS DEVICE HAVING FAST-RECEIVE MODE FOR MEASURING RECEIVED SIGNAL STRENGTH (RSSI) FOR HIGHER TIME DIVISION MULTIPLE ACCESS (TDMA) MULTISLOT CLASSES - A wireless communications device having a fast-receive mode for measuring received signal strength indication (RSSI) enables the device to handle higher time division multiple access (TDMA) multislot classes without requiring that the device include either a second receiver or a receiver with a more advanced and expensive phase-locked loop (PLL) design. The time to complete an RSSI measurement is reduced by initiating the sampling of signal strength before the radio transceiver is fully stabilized in the downlink mode. By initiating sampling before PLL stabilization is complete, the overall time to complete an RSSI measurement is reduced sufficiently to enable scheduling of an RSSI measurement in each GSM frame.02-18-2010
20130083788Delay-Induced Scattering with Phase Randomization and Partitioned Frequency Hopping - A method includes generating multiple copies of a signal that comprises a plurality of time division multiple access frames. The multiple copies of the signal includes a first copy and one or more other copies of the signal. Each of the one or more other copies of the signal having a respective fixed delay and a respective phase relative to the first copy of the signal. The method also includes transmitting the multiple copies of the signal using hopping carrier frequencies. The hopping carrier frequencies associated with a consecutive pair of the plurality of time division multiple access frames are separated by an odd multiple of a separation value representing a frequency separation between two adjacent carrier signals. The respective fixed delay is proportional to the separation value for each of the one or more other copies of the signal.04-04-2013
20090073954Techniques for Wireless Personal Area Network Communications with Efficient Spatial Reuse - An embodiment of the present invention provides a method for communicating in a wireless personal area network (WPAN), comprising using Spatial Division Multiple Access (SDMA) in said WPAN network by exploiting directional antennas.03-19-2009
20090303980APPARATUS AND METHOD FOR ERROR CONCEALMENT FOR A DIGITAL WIRELESS PHONE - A method and system to conceal transmission errors in a digital wireless system is disclosed. The system is used in the uplink or the downlink of a cordless or wireless TDMA system. When there are unused data slots available, the system allocates redundant slots in a data frame to a single mobile unit. The receiving device calculates a quality of slot (QoS) score for each slot that it receives data for. After the QoS score is calculated, the system calculates a Quality of Audio Segment (QoAS) score for each individual segment. It does so by comparing the individual audio segments that were received. Segments that are identical are assigned a positive score, while segments that differ get no score. The QoAS for each segment is added to the QoS for the slot the segment was transmitted in to generate the total score. The system then chooses the segment with the highest total score. If the total score is above a specified threshold, the system outputs the segment to the next component. Otherwise, it outputs a mute segment.12-10-2009
20130058322POWER AMPLIFIER FOR TIME DIVISION MULTIPLE ACCESS - Disclosed herein is a power amplifier for time division multiple access. The power amplifier for time division multiple access includes: power amplifiers power-amplifying input transmission signals and outputting the amplified signals; a power control unit using a time division multiple access type to control amplification of the power amplifiers; a switching unit formed at output terminals of the power amplifiers and the power control unit and outputting the amplified signals to an antenna based on a switching pass determined by the power control unit; and a timing control unit formed at an input terminal of the power control unit and determining turn-on time of a second signal by a level of an output signal generated by comparing a first signal with reference voltage.03-07-2013
20090268708FLOW CONTROL MECHANISMS ON SYNCHRONOUS SERIAL TDMA BUS - A method of transmitting data allows flow control information to be transmitted with the user data over a synchronous bus. A channel is defined, identifying the source and at least one sink, and this includes the definition of a transport profile, indicating a flow control requirement for the data. Data is then transmitted from the source over the bus in at least one data time slot (10-29-2009
20090097468WIRELESS NETWORKS FOR HIGHLY DEPENDABLE APPLICATIONS - A wireless communication system comprises one or more control units operable to transmit control signals, a plurality of actuators responsive to the control signals, and a plurality of sensors operable to transmit sensor data used by the one or more control units in generating the control signals. Each of the sensors, actuators, and one or more control units are located at a fixed position in the system relative to one another. Each of the plurality of sensors and each of the plurality of actuators are coupled to at least one of the one or more control units via a plurality of wireless paths. Each of the plurality of sensors are operable to transmit the sensor data in an assigned time slot to at least one of the one or more control units over a plurality of wireless channels in each of the plurality of wireless paths. The number of channels in each of the plurality of wireless paths is determined based, at least in part, on a worst-case estimate of potential interference, and each of the plurality of sensors is operable to pseudo-randomly switch the plurality of channels over which the sensor data is transmitted.04-16-2009
20090046696DTMF SIGNALING IN WIRELESS COMMUNICATIONS NETWORKS - Techniques for transmitting DTMF symbols in wireless communications networks are disclosed. For instance, an apparatus may include a dual-tone multi-frequency (DTMF) messaging module and a transceiver. The DTMF messaging module generates a layer 3 (L3) DTMF message that represents two or more DTMF digits. The transceiver sends the DTMF message across a wireless communications network, such as a GSM network or a UMTS network. In addition, the transceiver receives, from the wireless communications network, an acknowledgment of the DTMF message. This acknowledgment is a DTMF-specific L3 signaling message.02-19-2009
20120230322METHODS AND APPARATUS FOR DIFFUSING CHANNEL TIMING AMONG SUBSCRIBER UNITS IN TDMA DIRECT MODE - A method for diffusing channel timing among a plurality of subscriber units operating in TDMA Direct Mode, wherein the method includes: receiving, from a second one of the subscriber units operating in the TDMA Direct Mode, a first message; determining first channel timing from the received message; determining whether the received first channel timing is correct, wherein the determining is based at least on comparing a generation of the first subscriber unit with a generation of the second subscriber unit; when the received first channel timing is correct, starting a random delay; upon expiration of the random delay, transmitting a first forced propagation message to propagate the first channel timing to at least a third one of the subscriber units operating in the TDMA Direct Mode and having a higher generation than the generations of the first and the second subscriber units.09-13-2012
20110280238ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) COMMUNICATION SLOT STRUCTURES AND METHODS - Improved orthogonal frequency-division multiplexing (OFDM) communication slot structures and method are described. One example method includes converting a first portion of a set of bits to a first orthogonal frequency-division multiplexing symbol to be transmitted during a first portion of a time-division multiple access time slot, and converting a second portion of the set of bits to a second orthogonal frequency-division multiplexing symbol to be transmitted during a second portion of the time-division multiple access time slot. Other embodiments are shown and described.11-17-2011
20120287917Common Channel Configuration to Facilitate Measurement for Handover in TD-SCDMA Systems - A method of wireless communication includes communicating information with a neighbor Node B in a subframe. The information is associated with uplink timing. The method includes communicating with a serving Node B in the subframe.11-15-2012
20100290451Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance - Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance. A common backbone (either wired or wireless) is employed that provides a common CLK (clock signal) to all of the various PNCs (piconet coordinators) of various piconets that may operate within a sufficiently close region such that interference could undesirably occur. By providing a very reliable CLK signal from a common backbone to all of the PNCs of the various piconets operating within a substantially close proximity to one another, very precise synchronization may be ensured for all of the communications performed therein. The various piconets may then even operate using TDMA (Time Division Multiple Access)—whose performance would be substantially compromised without effective synchronization. In addition, combined TFC (time frequency code) and TDMA may also be employed to support the communications therein thereby providing even another degree of orthogonality that provided by TDMA alone.11-18-2010
20080310390TDMA COMMUNICATIONS SYSTEM WITH CONFIGURATION BEACON AND ASSOCIATED METHOD - A communications system includes a plurality of nodes forming a time division multiple access (TDMA) communications network. Each node within the TDMA communications network includes a controller and wireless communications device allowing the nodes to communicate with each other using respective timeslots in a TDMA frame, also sometimes referred to as an epoch. Each node is operative for transmitting and receiving a beacon positioned in time at the front of a frame to carry configuration information about the nodes in the TDMA communications network.12-18-2008
20090196276Internal data structure of mobile terminal for qos-based uplink data transmission, and operational methods thereof - A recording medium having an internal data structure for uplink data transmission based on QoS in a mobile terminal of an OFDMA/TDMA-based high-speed portable Internet system, the internal data structure comprising a connection identifier index indicating a predetermined connection of the mobile terminal; a service class index indicating QoS classes of uplink data; a control channel index indicating a type of a control channel for transmission of a management message of the mobile terminal; an access type index indicating a type of access for a bandwidth request of the mobile terminal; a user packet list having IP packets linked to each other through a linked list; a management message list having the management messages linked to each other through a linked list; and a bandwidth request list having informative elements that are linked to each other for the bandwidth request through a linked list.08-06-2009
20090086705APPARATUS AND METHOD FOR SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM - A method of scheduling an uplink (UL) data packet on a packet data network (PDN) connection of at least one radio bearer by a wireless communication unit comprises receiving, by the wireless communication unit, a signalling message comprising at least one scheduling priority parameter assigned to at least one uplink radio bearer, wherein the at least one scheduling priority parameter is based on at least one characteristic of the PDN connection that the radio bearer belongs to. The method further comprises determining, from the at least one scheduling priority parameter, at least one user transmission priority level associated with at least one PDN connection of at least one radio bearer; and scheduling at least one uplink data packet transmission in response to the at least one user transmission priority level.04-02-2009
20100091759MEDIA ACCESS CONTROL PROTOCOL DATA UNIT AGGREGATION IN A TIME DIVISION MULTIPLE ACCESS MEDIA ACCESS CONTROL LAYER - A method and apparatus are described for creating a multi-media stream (e.g., video, voice, audio, etc. . . . ) Super-MAC frame in a physical protocol data unit, including inserting a physical layer header into a channel time allocation and generating the multi-media stream SuperMAC frame further including, appending a media access control header after the physical layer header, calculating a header correction code, appending the header correction code after the media access control header, appending a media access control multi-media stream payload from a transmit queue, calculating a frame check sequence, appending the frame check sequence after the media access control multi-media stream payload and repeating the above acts, after inserting the physical layer header, until one of the channel time allocation is full or all transmit queues are empty.04-15-2010
20090147766SYSTEM AND METHOD FOR SETTING A DATA RATE IN TDMA COMMUNICATIONS - A mobile ad-hoc network includes a plurality of N mobile nodes and wireless communication links connecting the mobile nodes, which each include a communications device for transmitting and routing data packets wirelessly to other mobile nodes via the wireless communication links in accordance with a time division multiple access (TDMA) data transmission protocol using a TDMA epoch that is divided into a beacon interval, digital voice interval and digital data interval. The mobile nodes monitor channel conditions using the beacon, digital voice and digital data intervals and provide a network conductivity performance as valid receptions occur within mobile nodes. A data rate is calculated and set for other N−1 mobile nodes using monitored channel conditions for the beacon, digital voice and digital data intervals.06-11-2009
20100054229METHOD AND DEVICE FOR ANTENNA TRACKING - In a mesh network using a TDMA protocol: determination is made of a first set of antenna angles to be used by a receiving antenna of a recipient node to capture data respectively sent by a plurality of sending nodes; reception is made of data sent by the sending nodes using the respective antenna angle of the first set; at least one correlation operation is made between the various redundant copies of the same item of data, received by the recipient node; at least one copy not necessary for the decoding of the received data is deduced determination is made of at least one time slot during which the copy not necessary for the decoding is received; and during that time slot, the antenna angle used by the receiving antenna to receive data sent by the sending node allocated to that time slot is updated.03-04-2010
20090310592Techniques for spatial reuse in wireless personal area networks based on virtual time divisional multiple access - An embodiment of the present invention provides a method, comprising configuring a transceiver for special reuse using a virtual time division multiple access (TDMA) technique in a wireless personal area network that allows additional non-interfering transceivers to perform concurrent transmissions with said transceiver.12-17-2009
20100124215TRANSMITTER, REMOTE CONTROLLER AND TRANSMISSION METHOD - A transmitter includes a power measurement unit, a carrier sense unit, and a transmission unit. A first frequency band is allocated to a TDMA system. The power measurement unit measures a receiving power over a part of a first frequency band and a second frequency band. The carrier sense unit continues to check for a certain duration whether the receiving power is smaller than a threshold. The transmission unit generates a transmission signal including a dummy signal and a data signal when the receiving power has been smaller than the threshold for the certain duration. Moreover, the transmission unit transmits the transmission signal using the second frequency band.05-20-2010
20120106536METHOD AND APPARATUS FOR ACHIEVING SYNCHRONIZATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for synchronizing a communication device in a communication system includes receiving a transmission from another communication device. The transmission comprises a plurality of time slots and a plurality of signaling fields inserted between the time slots. The plurality of signaling fields include a set of signaling fields of a first information type and a set of signaling fields of a second information type. The method includes detecting at least two consecutive signaling fields of the first information type, recovering a received pattern contained in a n05-03-2012
20090168743GSM MOBILE TERMINAL AND NOISE SUPPRESSION METHOD FOR THE SAME - A TDMA mobile terminal and noise suppression method for the same are provided. The mobile terminal includes a storage unit for storing a gain control table. The gain control table contains gain control values used for controlling gains of at least one of an outgoing audio signal and an incoming audio signal in order to suppress frequency dependent noise in the at least one signal. The mobile terminal also includes an audio processing unit for processing an audio signal by amplifying the audio signal according to applied gain control values. The mobile terminal further includes a control unit for measuring, during call processing, at least one of a transmit power level and a receive power level, determining corresponding gain control values from the gain control table, and applying the determined gain control values to the audio processing unit.07-02-2009
20080304469Radiocommunication System Mobile Station Which Can Communicate Directly with Another Mobile Station - The present invention relates to a mobile station of a mobile radiocommunication system of the type comprising means for receiving synchronisation channels transmitted on at least one carrier so as to be able to synchronise with a base station and transmit data in a traffic channel defined with respect to said synchronisation channels.12-11-2008
20120069835WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE, AND METHOD - A wireless communication system includes wireless terminals. Each of the wireless terminals includes an SDM transmitting unit that includes antennas and generates directional radio signals to be transmitted to other terminals, each of which is obtained by superimposing radio signals at the antennas, each of which is composed of modulated data for each of the other terminals; a single-system receiving unit; and a TDMA control unit that controls a transmission of the SDM transmitting unit and a reception of the receiving unit in a time division manner. Using a TDMA scheme, the wireless terminals are controlled such that one of the wireless terminals acquires a transmission right for a predetermined time period to simultaneously transmit the generated directional radio signals from the SDM transmitting unit, while during the predetermined time period, the receiving units of the other wireless terminals having no transmission right simultaneously receive their corresponding directional radio signals.03-22-2012
20110222526METHOD FOR FREQUENCY DIVISION DUPLEX COMMUNICATIONS - The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a user's available bandwidth on demand by assigning additional TDMA slots during the user's session.09-15-2011
20090219916METHOD TO SCAN FOR CRITICAL TRANSMISSIONS WHILE TRANSMITTING ON A CONVENTIONAL TIME DIVISION MULTIPLE ACCESS CHANNEL - A method allowing wireless communications devices to scan for critical transmissions while transmitting on a conventional time division multiple access channel (TDMA) is disclosed. The TDMA channel is divided into a plurality of slots, each slot capable of carrying audio, video, control, and/or data transmissions. A first slot is used by a first communication device, while a second slot is used by a second communication device. The first communication device transmits at least one burst of information from a first transmission in a first slot. The first communication device switches to a second slot and reads at least one signaling information segment embedded in a second transmission that is being transmitted in the second slot. The first communication device determines to terminate the first transmission in order to receive the second transmission, or to switch back to the first slot and repeat the steps of transmitting, switching, reading and determining.09-03-2009
20090245226Communication System and Method for Improving Efficiency and Linearity - A communication system and method is provided that modifies a signal for transmission at a transmitter to reduce peaks associated with the signal. The signal can be modified employing signal shaping, signal clipping, signal decomposition or other techniques to remove peaks associated with the signal. The communication system can also correct the modified signal at a receiver to reconstruct the originally wanted signal.10-01-2009
20100260166Communication Node, Communication System And Ad Hoc Communication Method In Accordance With Time Division Multiple Access Scheme - A communication node, which performs ad hoc communication by occupying at least one time slot and transmitting a data block to one or a plurality of other nodes via the occupied at least one time slot through broadcasting, comprises a determination unit that determines an occupation time slot to be occupied by an own node in a frame used for transmitting the data block, based on occupation state data, a data block generating unit that generates the data block storing, in a control field, control data containing new occupation state data obtained by updating the occupation state data based on an occupation state of the occupation time slot, the data block being to be transmitted by the own node through the broadcasting, and a transmission unit that transmits the data block generated through the broadcasting via the occupation time slot.10-14-2010
20080232343Apparatus and method for estimating uplink frequency offset in wireless communication system - Provided is an apparatus and method for estimating an uplink frequency offset in a wireless communication system. In a receiving apparatus of a wireless communication system using a random access channel composed of two equivalent sequences, the apparatus includes a channel receiver which extracts samples corresponding to the two sequences from an input random access channel signal; a correlator which computes first and second correlation values by correlating preceding and trailing samples among the samples output from the channel receiver with a predetermined sequence; and a frequency offset estimator which estimates a frequency offset by using a ratio of the second correlation value to the first correlation value output from the correlator.09-25-2008
20090316679Broadcast-only distributed wireless network - Communication in a broadcast-only distributed wireless network of nodes is provided. Each of the nodes of the network uses a repeated communication frame with an idle period and a TDMA schedule for active communication. The active TDMA schedule of at least some of the nodes in the network are aligned and synchronized. The distributed network does not require a central node for coordinating the TDMA schedules of another node or for synchronizing the communication frames. TDMA slots of the TDMA schedule are used for broadcasting and receiving messages. A node broadcasts a message without the use of an address of the receiving node. Communication frames having dynamic properties, such as communication frame length and start time, TDMA schedule position and length, and idle period position and length, are provided. Distributed functions for nodes to search for and synchronize with other nodes are also provided.12-24-2009
20130215879WIRELESS NETWORK FOR AIRCRAFT CABIN - The invention relates to a method for activating and maintaining a plurality of separate and distanced functional units in an aircraft cabin. According to the invention, a wireless network comprising a plurality of nodes is initialized, wherein each node is associated with a device wherein said initializing comprises associating each node a sending time slot within a time frame using a TDMA synchronization scheme, wherein each node is active to send signals during its sending time slot and is active to receive signals during a first set of time slots comprising a number of time slots of said frame, wherein the sending time slot of a node is different from the sending time slots of at least a plurality of its neighbored nodes.08-22-2013
20100128713BEAM STEERING IN A MESH NETWORK WITH REPETITIONS - The device for steering a beamforming antenna (05-27-2010
20130128876CONCEPT FOR COMBINING CODED DATA PACKETS - Concept for transmitting payload data from a transmitter to a receiver via a communication channel within a time interval, wherein channel-coded data packets are generated from the payload data, wherein each of the channel-coded data packets has packet core data corresponding to a packet identification of the respective channel-coded data packet, and wherein the packet core data is coded with a channel code of higher redundancy than the payload data. The channel-coded data packets are sent without any return channel to the receiver, which decodes packet core data of a first received channel-coded data packet of the time interval. If error-free decoding of the first channel-coded data packet fails, packet core data of at least one second received channel-coded data packet of the time interval are decoded to determine a suitable further channel-coded data packet for combination with the first channel-coded data packet to acquire, on account of the combination, an increased code gain for decoding of the payload data.05-23-2013
20080279172Radio Communication Device, Demodulation Method, and Frequency Deflection Correction Circuit - A demodulation section 11-13-2008
20090129366Multiple Power-Multiple Access in Wireless Networks for Interference Cancellation - A method and network communicate packets by assigning, in each one of a set of multiple transmitters, a power level to a packet to be transmitted during a time interval. The power level is selected from a set of power levels available for the set of multiple transmitters. The power levels in the set range from highest to lowest. There is one packet for each transmitter such that there is a set of packets to be transmitted during the time interval. The set of packets is transmitted concurrently during the time interval to enable decoding of at least one of the packets in the set of packets during the time interval.05-21-2009
20110019659Method and Device for Service Time Division Multiplexing - A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes: selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of service transmitted in broadcast or multicast mode.01-27-2011
20110128952METHOD AND APPARATUS FOR RESOURCE ALLOCATION USING DIRECTIONAL BEAM IN WIRELESS NETWORK - A method and apparatus for allocating resources using a directional beam in a wireless communication network is provided. A coordinator device calculates the number of flows able to be concurrently transmitted with each flow that is generated between the nodes and a transmission time of the each flow, and groups together the flows based on the calculation result. In addition, the coordinator device allocates resources to the respective nodes such that the nodes which generate the flows belonging to the same group can transmit the flows concurrently. Thus, the amount of the overall concurrent transmission can be maximized.06-02-2011
20100008349DYNAMIC POWER MANAGEMENT FOR TIME DIVISION MULTIPLEXING DEVICES - A method of dynamic power management in a time division multiple access (TDMA) system. The method comprising comparing each of a plurality of streams; grouping each of the plurality of streams into a plurality of powergroups, wherein each of the plurality of powergroups may comprise multiple streams, scheduling a burst transmission based on the plurality of powergroups; and adjusting the power stage based on the plurality of powergroups, wherein the system is configured to turn off selected components based on the power stage and the scheduled burst transmissions.01-14-2010
20090310591VoIP multimode WLAN, Wi-Fi, GSM, EDGE, TDMA, spread spectrum, CDMA systems - Voice over Internet Protocol (VoIP) voice signal processed into Orthogonal Frequency Division Multiplexed (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) signal. Processor and transmit filter for processing and filtering a signal and for providing a Time Division Multiple Access (TDMA) signal. Processing and filtering a signal and providing cross-correlated in-phase and quadrature-phase filtered baseband signal. Modulator and a transmitter for modulation and transmission of selected or combined signal. A two antenna receiver for receiving transmitted signal, a demodulator, receiver filter and receiver processor for demodulation, filtering and processing of received TDMA signal. Receive filter for filtering of the TDMA signal is mismatched to the transmit filter for filtering of the TDMA signal and receive processor for processing provides processed received baseband mis-match filtered cross-correlated in-phase and quadrature-phase TDMA signal. Processor and transmit baseband filter for processing and filtering a signal and for providing cross-correlated in-phase and quadrature-phase filtered baseband signal including a location finder signal. VoIP multimode Wireless Local Area Network (WLAN), wireless fidelity (Wi-Fi), Global Mobile System (GSM) cellular network, spread spectrum and CDMA systems. Transmitter operated as a linearly amplified or linearized amplifier transmitter and a second transmitter operated as a Non-Linearly Amplified (NLA) transmitter.12-17-2009
20100014505METHOD AND DEVICE FOR SERVICE TIME DIVISION MULTIPLEXING - A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes: selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of service transmitted in broadcast or multicast mode.01-21-2010
20100098049METHOD AND DEVICE FOR CHANNEL INSPECTION IN A COMMUNICATION SYSTEM - To perform channel inspection, a wireless communication device conducts a full inspection on a first channel carrying a first signal that includes: determining a location of a first synchronization message; and determining whether the first signal is of interest. Upon determining that the first signal is not of interest, the first channel is marked, wherein the marking includes remembering the location of the first synchronization message. The device leaves the first channel and determines an expected location of a second synchronization message on the first channel based on the location of the first synchronization message. Upon returning to the first channel which carries a second signal, the communication device conduct a partial inspection that includes: detecting whether the second synchronization message is present at the expected location, wherein the presence of the second synchronization message indicates that the second signal is not of interest.04-22-2010
20080298339METHOD FOR FREQUENCY DIVISION DUPLEX COMMUNICATIONS - The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a user's available bandwidth on demand by assigning additional TDMA slots during the user's session.12-04-2008
20080267161SIGNALING OF RANDOM ACCESS PREAMBLE TIME-FREQUENCY LOCATION IN WIRELESS NETWORKS - Embodiments of the present disclosure provide a base station sub-system, a method of allocating random access configurations and a method of downlink signaling of random access configurations. In one embodiment, the base station sub-system is for use in a wireless communication system and includes an allocator configured to allocate random access configurations having a plurality of time slots that use a single frequency resource. Additionally, the base station sub-system also includes a transmitter configured to signal at least one index of the random access configurations and a random access receiver balancing in time the processing load of the random access detection of different cells served by the base station.10-30-2008
20080267162Method and Apparatus Performing Express Forwarding Bypass for Time-Critical Frames - A method, apparatus and computer program product for the express forwarding bypass are presented. A timer (NAV) is maintained at each respective node of a wireless LAN, the timer (NAV) set to a corresponding time period during which the respective node must refrain from transmitting on a channel. The first node of said plurality of nodes has a time-critical (TC) frame. The first node detects a frame to be express-forwarded by a second node. The first node decrements the duration field by a first predetermined time increment (DT10-30-2008
20110164605WIRELESS COMMUNICATION SYSTEM - A wireless communication system includes a coordinator (07-07-2011
20080253353MIMO Polar, Non-Quadrature, Cross-Correlated Quadrature GSM, TDMA, Spread Spectrum, CDMA, OFDM, OFDMA and Bluetooth Systems - Multiple Input Multiple Output (MIMO) system for receiving signals received from multiple inputs and transmitting signals to multiple output signal transmitters and multiple receivers for receiving transmitted signals. Processor for processing received location finder signals and for providing location finder processed baseband signals to a polar modulator for polar modulation of processed baseband signal. Processors for providing processed baseband signals to a non-quadrature or a quadrature modulator for modulation of processed baseband signal. Processor for processing and providing Orthogonal Frequency Division Multiplex Access (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) signals for modulation and to multiple output transmitters. Processor for processing received signals and for providing processed baseband signals to a cross-correlator for cross-correlating and filtering in-phase and quadrature-phase baseband signals and for providing cross-correlated quadrature signals to a quadrature modulator for modulation of cross-correlated filtered baseband signal. Spread spectrum processor and cross-correlator for spread spectrum processing and cross-correlating in-phase and quadrature-phase baseband signals. Time Division Multiple Access (TDMA), Global Mobile System (GSM) processors and baseband filters for providing TDMA, Bluetooth, spread spectrum and GSM system signals used in MIMO systems. Receiver system comprising two receivers for reception and demodulation of the transmitted signal.10-16-2008
20080205374Pilot signal enhancements for a wireless communication system - In a method and apparatus suitable to convey timely information for facilitating accurate reception of transmitted data, a pilot signal is modulated to convey information. The information may facilitate efficient interpretation of an associated traffic signal. Modulation of a pilot signal frame may be limited to ensure early detection, and/or to minimize impairment of pilot functionality. In one embodiment, a Secondary Pilot Channel (SPICH) is transmitted at one of several selectable power levels to boost effectiveness of a phase reference, and is modulated to indicate the selected level. Such timely information enables prompt optimal combining of the SPICH with a primary Pilot Channel (PICH), and/or permits processing efficiencies for an associated traffic channel. Pilot signal frames may be transmitted at a predetermined level during a detection preamble portion of a frame to ensure accurate and early detection, and at a more optimal level thereafter.08-28-2008
20110255527METHOD FOR SYNCHRONIZING DIRECT MODE TIME DIVISION MULTIPLE ACCESS (TDMA) TRANSMISSIONS - A method for synchronizing the direct mode TDMA transmission of a set of radios by following a selected radio as the leader includes: receiving, by a radio, a communication from an other radio; identifying, by the radio, a leader according to a leadership election rule using the received communication from the other radio and a current leader information; setting, by the radio, the identified leader as its leader; and synchronizing, by the radio, a time slot boundary with a time slot boundary defined by the leader.10-20-2011
20100020784APPARATUS, NETWORK AND METHOD FOR IMPLEMENTING TDM CHANNELS OVER A CSMA SHARED MEDIA NETWORK - A carrier sense multiple access network comprises communication nodes which communicate with other nodes over the network using carrier sense multiple access (CSMA). The nodes further comprise channel support capability to set up multiplex channel connections between specific nodes over the CSMA based network. The network thus may reduce conflict issues raised by CSMA and at the same time improve bandwidth utilization.01-28-2010
20100054228MULTI-TIER AD-HOC NETWORK COMMUNICATIONS - Ad-hoc wireless network which operates in accordance with a time division multiple access (TDMA) channel scheme. The network includes a plurality of nodes configured for wireless ad-hoc network communications using at least a first tier waveform and a second tier waveform.03-04-2010
20100329234FRONT END FOR RF TRANSMITTING-RECEIVING SYSTEMS WITH IMPLICIT DIRECTIONAL CONTROL AND TIME-MULTIPLEXING METHOD IN SUBMICRON TECHNOLOGY - 2.1. A new design configuration of an RF-transceiver front end is proposed.12-30-2010
20090052427SINGLE CARRIER TRANSMISSION SYSTEM, COMMUNICATION DEVICE, AND SINGLE CARRIER TRANSMISSION METHOD USING FOR THEM02-26-2009
20120014370EQUIPMENT, SYSTEM AND METHODOLOGIES FOR TIME SYNCHRONIZATION BETWEEN MULTIPLE RF FREQUENCIES, RF POWER, AND ANTENNA SELECTION OF BOOSTERS IN A SEGMENTED LISTENING AREA DELIVERING LOCALIZED AUXILIARY INFORMATION - Radio broadcasting equipment is provided that enables targeted radio broadcast advertisement delivery in an radio broadcast area wherein a plurality of radio auxiliary or booster transmitters are used to transmit localized auxiliary information to supplement broadcast area wide content transmitted on the same frequency. Moreover, these auxiliary or booster transmitters are configured to transmit different localized auxiliary information to supplement a plurality of main transmitters transmitted on corresponding specified transmission frequencies using Time Division Multiple Access frame structure.01-19-2012
20120014369SYSTEMS AND METHODS FOR ASSIGNMENT AND ALLOCATION OF MIXED-TYPE COMBINATIONS OF SLOTS - Methods and systems for performing allocation of mixed-type combinations of slots are provided. Specifically, in a single assignment message, an allocation of slots over two frames and slots over four frames is performed. These can be RTTI and BTTI blocks for example.01-19-2012
20120063445APPARATUS AND METHOD FOR REDUCING TDMA NOISE OF PORTABLE TERMINAL - An apparatus and a method for reducing a time division multiple access noise of a portable terminal are provided. The apparatus includes an interface unit to which an earphone is electrically connected, an audio processing unit including a virtual ground for transmitting and receiving an audio signal through the interface unit, a switch unit located electrically between the interface unit and the audio processing unit for electrically connecting a ground terminal of the interface unit with one of a real ground and the virtual ground of the audio processing unit, and a controller for controlling the switch unit to electrically connect the ground terminal of the interface unit with the virtual ground of the audio processing unit when a call function using the earphone is activated, and to electrically connect the ground terminal of the interface unit with the real ground when the call function using the earphone is deactivated.03-15-2012
20120134352Systems and Methods for Web-Based Push-To-Talk Communications - A method of enabling a push-to-talk (PTT) connection between a first user on a first network and a second user on a second network is provided. According to the method, a web application registration server on the first network receives and authenticates login information from the first user, forwards the login information to a PTT server, and assigns a temporary network identity from a pre-allocated pool of network identities to a client of the first user. After the PTT registration has been authenticated, a PTT call may be conducted between the first user and the second user. The first network may be an internet protocol-based network. The second network is a multiple-access network for cellular devices, such as a Time Division Multiple Access (TDMA) network or any other wireless network.05-31-2012
20090016317METHODS AND APPARATUS FOR SUPPORTING GROUP COMMUNICATIONS UTILIZING DEVICE IDENTIFIERS - Methods and apparatus related to group communications in a wireless communications system, e.g., a peer to peer wireless communications system, are described. Methods and apparatus directed to closed groups, e.g., where the number of group members are fixed at a given time and known to one or more members of the group, are described. Various embodiments are well suited to decentralized peer to peer wireless networks including a plurality of individual traffic resources, e.g., traffic slots and/or traffic segments, which may be independently scheduled in a decentralized manner. Various features and/or aspects are directed to associating group transmission request resources and/or request response resources with device identifiers as opposed to associating such resources with connection identifiers. This approach is well suited for large size groups of N members, where the number of the number of connections between members of the group is approximately N01-15-2009
20090016318SYNCHRONIZED UWB PICONETS FOR SOP (SIMULTANEOUSLY OPERATING PICONET) PERFORMANCE - Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance. A common backbone (either wired or wireless) is employed that provides a common CLK (clock signal) to all of the various PNCs (piconet coordinators) of various piconets that may operate within a sufficiently close region such that interference could undesirably occur. By providing a very reliable CLK signal from a common backbone to all of the PNCs of the various piconets operating within a substantially close proximity to one another, very precise synchronization may be ensured for all of the communications performed therein. The various piconets may then even operate using TDMA (Time Division Multiple Access)—whose performance would be substantially compromised without effective synchronization. In addition, combined TFC (time frequency code) and TDMA may also be employed to support the communications therein thereby providing even another degree of orthogonality that provided by TDMA alone.01-15-2009
20090219915DISTRIBUTED REQUEST QUEUE FOR A DATA COMMUNICATION SYSTEM, AND RELATED OPERATING METHODS - A user equipment (UE) device and associated operating techniques can be utilized to manage the queuing of network service requests in a distributed manner throughout a data communication system. The request queuing methodology leverages request queues maintained at UE devices within the system. An embodiment of a UE device that supports such request queuing includes a processor and a request queue coupled to the processor. The request queue is configured to queue one or more requests for network resources as instructed by the processor, resulting in one or more held requests. The UE device also includes a receiver element coupled to the processor. The receiver element is configured to receive a notification from the network communication component, where, in response to receiving the notification, the processor prepares the one or more held requests for transmission to the network communication component at different times.09-03-2009
20120320901USE OF ORTHOGONAL OR NEAR ORTHOGONAL CODES IN REVERSE LINK - An apparatus and method for use with a shared access communication channel is disclosed. A wireless network device receives signals and recovers data from a first plurality of subscriber units and a second plurality of subscriber units in a time interval. Received signals from the first plurality of subscriber units are distinguishable by having unique pseudo noise (PN) sequence with respect to others of the first plurality of subscriber units. Received signals the second plurality of subscriber units are distinguishable by a unique orthogonal sequence with respect to others of the second plurality of subscriber units. Received signals are distinguished between the first and second plurality of subscriber units based on detection of an orthogonal sequence present only in the received signals from the second plurality of subscriber units.12-20-2012
20100232414METHOD FOR SHARING WIRELESS CHANNEL RESOURCE IN COMMUNICATION SYSTEM - A method for sharing a channel in a communication system is disclosed. The method includes receiving scheduling information including information about a channel time reserved by other user devices, and transmitting data through the reserved channel time if a result of performing scanning in the reserved channel time indicates that no interference occurs, wherein the communication system performs communication using beam signals which are directional. If the signals are highly directional, the channel sharing method enables a plurality of user devices to share a channel, thereby increasing the efficiency of channel use.09-16-2010
20120327927Method of Efficiently Synchronizing to a Desired Timeslot in a Time Division Multiple Access Communication System - The time required for the receiving device to synchronize to a desired timeslot is reduced. In operation, a transmitting device selects a synchronization pattern associated with the desired timeslot that is at least mutually exclusive from synchronization patterns associated with other timeslots on the same frequency in the system. Once selected, the transmitting device transmits a burst embedding the synchronization pattern that was selected, where appropriate. If the receiving device detects the synchronization pattern, it immediately synchronizes with the timeslot with confidence that it is synchronizing to the desired timeslot. Using synchronization pattern associated with the desired timeslot that is at least mutually exclusive from synchronization patterns associated with the other timeslots on the same frequency also improves spectral efficiency in direct-mode transmissions, thus allowing more than one subscriber unit to simultaneously transmit in direct mode on a frequency without interfering with other transmissions on the frequency.12-27-2012
20130016713PRECISE INTERVAL TIMER FOR SOFTWARE DEFINED RADIO - A precise digital fractional interval timer for software defined radios which vary their waveform on a packet-by-packet basis. The timer allows for variable length in the preamble of the RF packet and allows to adjust boundaries of the TDMA (Time Division Multiple Access) Slots of the receiver of an SDR based on the reception of the RF packet of interest.01-17-2013
20080240070Fingerprint Identification, Location Finder Communication System - Fingerprint signal, location and navigation signal and user generated signal processing and transmission. Global Positioning System (GPS) signals processed with fingerprint signals and Global Mobile System (GSM), Enhanced Digital GSM Evolution (EDGE) signals. Processors and filters for processing and filtering received user signal into processed cross-correlated in-phase and quadrature-phase filtered signal, into processed Orthogonal Frequency Division Multiplex (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) signals. Wireless Fidelity (Wi-Fi), Wireless Local Area Network (WLAN), Wide Area Network signals processed with fingerprint signal, location finder and navigation signal.10-02-2008
20080225825H-ARQ THROUGHPUT OPTIMIZATION BY PRIORITIZED DECODING - Systems and methodologies are described that facilitate data throughput optimization in a receiver through prioritized decoding of data transmissions. In particular, mechanisms are provided that assign priorities to obtained packets and/or sub-packets of a data transmission. The priorities can be assigned based at least upon prioritization rules that identify packets and/or sub-packets most likely to successfully decode. The obtained packets and/or sub-packets are decoded based upon the assigned priorities.09-18-2008
20080219236CONTROL SIGNALING RESOURCE ASSIGNMENT IN WIRELESS COMMUNICATION NETWORKS - A method in a wireless communication network scheduling entity (09-11-2008
20130094493ESTABLISHING FAIRNESS AND REDUCING DELAY IN BROADCAST BASED VEHICLE TO VEHICLE COMMUNICATION USING APPLICATION-LEVEL PHASE ADJUSTMENTS - A method for a station to periodically broadcast messages over a wireless channel to communicate to multiple other stations who transmit on the same channel, the station becomes ready to broadcast at successive message activation times, at a message activation time the station performing a Multiple Access mechanism (04-18-2013

Patent applications in class Multiple access (e.g., TDMA)

Patent applications in all subclasses Multiple access (e.g., TDMA)