Patent application number | Description | Published |
20080225693 | METHOD AND APPARATUS FOR UPLINK SCHEDULING SIGNALING IN A WIRELESS COMMUNICATION - A method and apparatus for efficient uplink scheduling grant and scheduling request signaling for evolved universal terrestrial radio access (E-UTRA) are disclosed. A wireless transmit/receive unit sends an uplink scheduling request to a Node-B, whereby the Node-B sends the uplink scheduling grant in response to the uplink scheduling request. The uplink scheduling request includes a data buffer occupancy value that indicates the amount of data that needs to be transmitted in the uplink. The amount of data is quantized to integer factors of the number of bits that may be supported by one RB, and mapped to an index value with N-bit mapping having less than full resolution. The uplink scheduling grant assigns a number of resource blocks to the WTRU for uplink transmission. The number of RBs allocated is mapped to an index value using N-bit mapping having less than full resolution. | 09-18-2008 |
20090202029 | OPTIMIZED PRIMARY SYNCHRONIZATION SEQUENCES FOR DEDICATED MULTIMEDIA BROADCAST/ MULTICAST SERVICE - A method optimizes a selection of primary synchronization channel (P-SCH) sequences from an available set of P-SCH indices for a dedicated Multimedia Broadcast/Multicast Service (MBMS). The criteria for selecting P-SCH indices include coprimeness, frequency offset sensitivity, multipath sensitivity, cross-correlation property in the time domain, auto-correlation property in the time domain and computation complexity at the receiver. | 08-13-2009 |
20100098012 | UPLINK CONTROL INFORMATION TRANSMISSION METHODS FOR CARRIER AGGREGATION - A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed. | 04-22-2010 |
20100272048 | METHOD AND APPARATUS FOR SENDING HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK FOR COMPONENT CARRIER AGGREGATION - Techniques for sending hybrid automatic repeat request (HARQ) feedback for transmissions received via a plurality of aggregated component carriers are disclosed. A wireless transmit/receive unit (WTRU) receive a plurality of codewords via a plurality of component carriers and decodes the codewords. The component carriers are grouped into a plurality of groups, and the WTRU may generate a bundled positive/negative acknowledgement (ACK/NACK) for each group of component carriers. The WTRU may be assigned a plurality of uplink control channel resources and may implement a channel selection scheme for indicating the ACK/NACKs. The WTRU selects one of the uplink control channel resources, and sets the HARQ feedback based the ACK/NACKs or bundled ACK/NACKs in a way that a different uplink control channel resource is selected and HARQ feedback bits are set differently based on the ACK/NACKs or bundled ACK/NACKs. Each physical uplink control channel (PUCCHs) may be mapped to a particular antenna. | 10-28-2010 |
20110170499 | METHOD AND APPARATUS FOR CHANNEL RESOURCE MAPPING IN CARRIER AGGREGATION - Methods and apparatus for preventing physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) ambiguities or collisions, for example, in a multi-carrier system or when transmitting multiple streams over multiple antennas, are described. Methods may include dividing resources or groups among multiple component carriers (CCs), using and assigning unused or vacant resources to CCs, forcing usage of adaptive HARQ processes in specified scenarios, setting a value for the cyclic shift of the corresponding uplink demodulation reference signals (DMRS) to a previous value for semi-persistent scheduling, and assigning a different first resource block for semi-persistent scheduling uplink resources and random access response grants for multiple CCs. | 07-14-2011 |
20110243066 | Uplink Control Data Transmission - Methods and systems for transmitting uplink control information and feedback are disclosed for carrier aggregation systems. A user equipment device may be configured to transmit uplink control information and other feedback for several downlink component carriers using one or more uplink component carriers. The user equipment device may be configured to transmit such data using a physical uplink control channel rather than a physical uplink shared channel. The user equipment device may be configured to determine the uplink control information and feedback data that is to be transmitted, the physical uplink control channel resources to be used to transmit the uplink control information and feedback data, and how the uplink control information and feedback data may be transmitted over the physical uplink control channel. | 10-06-2011 |
20120113831 | Determination of Carriers and Multiplexing for Uplink Control Information Transmission - Embodiments contemplate methods and devices that may select uplink (UL) transmission resources for transmitting uplink control information (UCI). A determination may be made that UCI should be transmitted. A physical channel resource for transmission of the UCI may be selected and a wireless transmit/receive unit (WRTU) may transmit the UCI over a physical uplink channel capable of supporting multiple component carriers using the selected physical channel resource. The selection of the physical channel resource may include at least one of: selecting a pre-determined UL component carrier (CC) for uplink transmission on a physical uplink control shared channel (PUSCH) upon a PUSCH resource being available in a subframe, or, selecting a pre-determined UL CC for uplink transmission on a physical uplink control channel (PUCCH) capable of UCI transmission in the subframe upon a PUSCH resource not being available in the subframe. | 05-10-2012 |
20120176884 | METHOD, SYSTEM AND APPARATUS FOR DOWNLINK SHARED CHANNEL RECEPTION IN COOPERATIVE MULTIPOINT TRANSMISSIONS - A method and apparatus may be used to enable reception of a downlink (DL) shared channel in a cooperative multipoint transmission (CoMP). The method and apparatus may determine whether CoMP is applied to a transmission. The method and apparatus may acquire other CoMP related information. The method and apparatus may apply to non-transparent CoMP scenarios. | 07-12-2012 |
20130003788 | COMMUNICATING CHANNEL STATE INFORMATION (CSI) OF MULTIPLE TRANSMISSION POINTS - Embodiments contemplate methods and systems for determining and communicating channel state information (CSI) for one or more transmission points (or CSI reference signal resources). Embodiments further contemplate determining transmission states may include applying at least one transmission state parameter to channel state information (CSI). Embodiments also contemplate reporting CSI based on the transmission state and/or at least one transmission state parameter applied thereto. | 01-03-2013 |
20130083753 | DEVICE COMMUNICATION USING A REDUCED CHANNEL BANDWIDTH - Systems and/or methods for supporting communications at a reduced bandwidth with a full bandwidth network such as a long-term evolution (LTE) network may be disclosed. For example, inband assignments such as downlink assignments and/or uplink grants may be provided and/or received and transmissions may be monitored and/or decoded based on the inband assignment. Additionally, information (e.g. a definition or configuration) associated with an ePDCCH may be provided and/or received and ePDCCH resources may be monitored and/or decoded based on such information. An indication for support of a reduced bandwidth by the full bandwidth network may also be provided and/or received and control channels in the reduced or narrow bandwidth may be monitored and/or decoded based on the indication. A PRACH preamble and/or a multi-type subframe definition may also be provided and/or used for support of such a reduced bandwidth. | 04-04-2013 |
20130176952 | Flexible Bandwidth Operation In Wireless Systems - Systems, methods, and instrumentalities are disclosed for downlink resource allocation associated with a shared frequency band. A WTRU may receive resource allocation information associated with a component carrier and at least one carrier segment. The component carrier and the least one carrier segment may each comprise a plurality of resource block groups (RBG). At least two bitmaps may be associated with the resource allocation information. A size of a resource block group (RBG) of the component carrier and the at least one carrier segment may be based on a combined number of resource blocks (RB) of the component carrier and the one or more carrier segments divided by a 3GPP Rel-8/Rel-10 RBG size of the component carrier. The WTRU may determine at least one RBG allocated to the WTRU using the resource allocation information and may receive and decode the at least one RBG allocated to the WTRU. | 07-11-2013 |
20130208604 | Interference Measurement In Wireless Networks - Embodiments contemplate methods, systems, and apparatuses for interference measurement in a wireless communication network, including wireless communication networks the employ MIMO in uplink and/or downlink communication. Embodiments contemplate identifying one or more interference measurement resource elements that may be received from one or more transmission points. Embodiments also contemplate performing interference measurement estimation based at least in part on the identified one or more interference measurement resource elements. Channel state information (CSI) perhaps in the form of reports may be generated based at least in part on the one or more interference measurement estimation. Embodiments also contemplate that the CSI report may be transmitted to one or more nodes. In some embodiments, the one or more interference measurement resource elements may be received as part of a set of resource elements. | 08-15-2013 |
20130242824 | METHOD FOR HALF-DUPLEX FDD OPERATION IN LTE FDD NETWORK - A method and apparatus for half-duplex (HD) frequency division duplex (FDD) (HD-FDD) operation are disclosed. The method in a wireless transmit/receive unit (WTRU) includes monitoring a first frequency for all downlink sub-frames for downlink communication except during a cell specific uplink frame, retuning to a second frequency and transmitting a scheduling request (SR) during a WTRU specific period of the cell specific uplink frame, wherein the WTRU specific period is based on a duty cycle, and retuning to the first frequency and receiving an uplink grant in a subsequent sub-frame. | 09-19-2013 |
20130322386 | METHOD AND APPARATUS FOR ACCESSING AN UPLINK RANDOM ACCESS CHANNEL IN A SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble. | 12-05-2013 |
20130329678 | METHOD AND APPARATUS FOR SENDING HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK FOR COMPONENT CARRIER AGGREGATION - Techniques for sending hybrid automatic repeat request (HARQ) feedback for transmissions received via a plurality of aggregated component carriers are disclosed. A wireless transmit/receive unit (WTRU) receive a plurality of codewords via a plurality of component carriers and decodes the codewords. The component carriers are grouped into a plurality of groups, and the WTRU may generate a bundled positive/negative acknowledgement (ACK/NACK) for each group of component carriers. The WTRU may be assigned a plurality of uplink control channel resources and may implement a channel selection scheme for indicating the ACK/NACKs. The WTRU selects one of the uplink control channel resources, and sets the HARQ feedback based the ACK/NACKs or bundled ACK/NACKs in a way that a different uplink control channel resource is selected and HARQ feedback bits are set differently based on the ACK/NACKs or bundled ACK/NACKs. Each physical uplink control channel (PUCCHs) may be mapped to a particular antenna. | 12-12-2013 |
20140036655 | MIMO BEAMFORMING-BASED SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. At a receiver, an FFT is performed on the received data to generate frequency domain received data. Subcarrier demapping is performed to extract data mapped on the assigned subcarriers. A channel estimator generates a channel matrix which is decomposed into U, D and V | 02-06-2014 |
20140098689 | WIRELESS COMMUNICATION USING MULTI-DIMENSIONAL ANTENNA CONFIGURATION - Communications may be performed in a communications system using multi-dimensional antenna configurations. A WTRU may receive communications from a base station via one or more channels. The communications may be performed using multiple component codebooks. The WTRU may send channel state information (CSI) feedback for each component codebook to the base station for consideration when performing communications with the WTRU. The WTRU may determine the CSI feedback for each component codebook based on channel measurements. The component codebooks may include a horizontal component codebook and/or a vertical component codebook. The WTRU may send the CSI feedback for each component codebook to the base station independently or in the form of a composite codebook. The WTRU may determine a composite codebook a function of the component codebooks. | 04-10-2014 |
20140314169 | METHOD AND APPARATUS FOR PROCESSING FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted. | 10-23-2014 |
20150036637 | METHOD AND APPARATUS FOR CHANNEL RESOURCE MAPPING IN CARRIER AGGREGATION - Methods and apparatus for preventing physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) ambiguities or collisions, for example, in a multi-carrier system or when transmitting multiple streams over multiple antennas, are described. Methods may include dividing resources or groups among multiple component carriers (CCs), using and assigning unused or vacant resources to CCs, forcing usage of adaptive HARQ processes in specified scenarios, setting a value for the cyclic shift of the corresponding uplink demodulation reference signals (DMRS) to a previous value for semi-persistent scheduling, and assigning a different first resource block for semi-persistent scheduling uplink resources and random access response grants for multiple CCs. | 02-05-2015 |
20150036645 | FLEXIBLE BANDWIDTH OPERATION IN WIRELESS SYSTEMS - Systems, methods, and instrumentalities are disclosed for downlink resource allocation associated with a shared frequency band. A WTRU may receive resource allocation information associated with a component carrier and at least one carrier segment. The component carrier and the least one carrier segment may each comprise a plurality of resource block groups (RBG). At least two bitmaps may be associated with the resource allocation information. A size of a resource block group (RBG) of the component carrier and the at least one carrier segment may be based on a combined number of resource blocks (RB) of the component carrier and the one or more carrier segments divided by a 3GPP Rel-8/Rel-10 RBG size of the component carrier. The WTRU may determine at least one RBG allocated to the WTRU using the resource allocation information and may receive and decode the at least one RBG allocated to the WTRU. | 02-05-2015 |
20150063252 | METHOD, SYSTEM AND APPARATUS FOR DOWNLINK SHARED CHANNEL RECEPTION IN COOPERATIVE MULTIPOINT TRANSMISSIONS - A method and apparatus may be used to enable reception of a downlink (DL) shared channel in a cooperative multipoint transmission (CoMP). The method and apparatus may determine whether CoMP is applied to a transmission. The method and apparatus may acquire other CoMP related information. The method and apparatus may apply to non-transparent CoMP scenarios. | 03-05-2015 |
Patent application number | Description | Published |
20090203925 | SYNTHESIS OF HIMBACINE ANALOGS - The present invention relates to an improved process for preparing himbacine analogs. The compounds are useful as thrombin receptor antagonists. The improved process may allow for at least one of easier purification by crystallization, easier scalability, and improved process yield on the desired enantiomer. | 08-13-2009 |
20090240063 | Process For The Preparation Of 6,6-Dimethyl-3-Azabicyclo-[3.1.0]-Hexane Compounds ... - The present invention provides for a process for preparing racemic methyl 6,6-dimethyl-3-azabicyclo[3,1,0]hexane-2-carboxylate, its corresponding salt: (2S, 3R, 4S)-methyl 6,6-dimethyl-3-azabicyclo[3,1,0]hexane-2-carboxylate di-p-toluoyl-D-tartaric acid (“D-DTTA”) salt or a (2R, 3S, 4R)-methyl 6,6-dimethyl-3-azabicyclo[3,1,0]hexane-2-carboxylate di-p-toluoyl-L-tartaric acid salt (“L-DTTA”) in a high enantiomeric excess. This invention also provides for a process for preparing a (2S, 3R, 4S)-methyl 6,6-dimethyl-3-azabicyclo[3,1,0]hexane-2-carboxylate dibenzoyl-D-tartaric acid (“D-DBTA”) salt or a (2R, 3S, 4R)-methyl 6,6-dimethyl-3-azabicyclo[3,1,0]hexane-2-carboxylate L-tartaric acid (“L-DBTA”) salt in a high enantiomeric excess. Further, this invention provides a process for preparing intermediates II, IIB, III, IV, IV salt, V, VI, and VII. | 09-24-2009 |
20090326241 | PROCESS FOR PREPARING SUBSTITUTED 5-AMINO-PYRAZOLO-[4,3-e]-1,2,4-TRIAZOLO[1,5-c]PYRIMIDINES - A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent. | 12-31-2009 |
20100029939 | PREPARATION OF KETONE AMIDES - The present invention discloses a novel process to prepare ketone amides, which are useful intermediates for the preparation of antagonists of CCR5 receptor and therefore useful for the treatment of HIV virus infected mammals. It specifically discloses a novel process to synthesize 1-(2,4-dimethylpyrimidine-5-carbonyl)-4-piperidone, 1-[(2,4-dimethyl-3-pyridinyl)carbonyl]-4-piperidone and related compounds. A salient feature of the invention is the use of a three-phase reaction medium with an organic phase and a buffer salt slurry. | 02-04-2010 |
20120065397 | PREPARATION OF KETONE AMIDES - The present invention discloses a novel process to prepare ketone amides, which are useful intermediates for the preparation of antagonists of CCR5 receptor and therefore useful for the treatment of HIV virus infected mammals. It specifically discloses a novel process to synthesize 1-(2,4-dimethylpyrimidine-5-carbonyl)-4-piperidone, 1-[(2,4-dimethyl-3-pyridinyl)carbonyl]-4-piperidone and related compounds. A salient feature of the invention is the use of a three-phase reaction medium with an organic phase and a buffer salt slurry. | 03-15-2012 |
Patent application number | Description | Published |
20100211029 | ASPIRATION SYSTEM FOR REMOVING LIQUID OTHER THAN URINE DISCHARGED BY THE HUMAN BODY - An aspiration system for removing liquid other than urine, which liquid is discharged from the human body, comprises a disposable body interface device having a liquid collection chamber. A liquid sensor detects the presence of liquid within the chamber, and controls application of aspiration suction to remove liquid from the liquid collection region. The body interface device may be a wound dressing, and the liquid wound exudate. The aspiration suction is controlled to remove only excess wound exudate. | 08-19-2010 |
20100211032 | ASPIRATION SYSTEM FOR REMOVING URINE DISCHARGED BY THE HUMAN BODY, AND LIQUID SENSOR THEREFOR - An aspiration system for removing urine from the human body comprises a disposable body interface device having a liquid collection chamber. A detachable or permanently attached non-contact liquid sensor disposed outside the liquid collection chamber detects the presence of urine within the chamber. The non-contact sensor is selected from: a capacitance sensor; an ultrasonic sensor; a piezo-resonant sensor; and a temperature sensor. | 08-19-2010 |
20100234820 | ASPIRATION SYSTEM AND BODY INTERFACE DEVICE FOR REMOVING URINE DISCHARGED BY THE HUMAN BODY - A body interface device for a urine aspiration system comprises a skin contact pad with gel adhesive for adhering to the skin, and a flexible cover attached to the pad. The pad includes at least one aperture for admitting urine through the pad into the body interface device. The flexible cover has a bulged form projecting away from the gasket. The flexible cover defines a urine receiving chamber facing towards the gasket, and recess facing away from the chamber for receiving at least a portion of a non-contact liquid sensor. The recess and chamber have a wall portion in common that separates the recess and the chamber. A liquid acquisition material in the chamber receives and transports urine for rapid sensing by the non-contact sensor. An aspiration unit is responsive to the non-contact liquid sensor to apply aspiration suction to the body interface device, upon detection of urine. | 09-16-2010 |
20100241092 | OSTOMY APPLIANCE - An ostomy appliance comprises a pouch having first and second walls, with an inlet aperture in the first wall. A stoma seal is carried by the second wall, and is disposed generally in register with the inlet aperture for sealing against a stoma in use. An outer coupling element is coupled to the first wall and surrounds the inlet aperture. An inner coupling element for supporting the stoma seal, is coupled to the second wall and/or to the stoma seal. The outer coupling element surrounds a periphery of the inner coupling element. The stoma seal may be of an inflatable type or an insertable type. Manipulation tabs may be provided associated with the inner and outer coupling elements. | 09-23-2010 |
20110060300 | ASPIRATION SYSTEM FOR REMOVING LIQUID DISCHARGED BY THE BODY, AND LIQUID SENSOR THEREFOR - An aspiration system is disclosed for removing body liquid (e.g. urine or a secretion) discharged by the human body. The aspiration system comprises a body interface device with a liquid sensor, and an aspiration unit coupled to the body interface device. The liquid sensor comprises a temperature sensor and/or a resistance bridge. The aspiration unit includes: a vacuum chamber; a pump for pre-charging the vacuum chamber with a vacuum; a valve coupled between the vacuum chamber and the body interface device; and a control circuit for controlling the valve to apply aspiration suction from the vacuum chamber to the body interface device in response to detection of body liquid at the liquid sensor. | 03-10-2011 |
20120109086 | CONTROLLED DISCHARGE OSTOMY APPLIANCE AND MOLDABLE ADHESIVE WAFER - A controlled discharge ostomy appliance is described for use with an adhesive body fitment. The body fitment comprises an adhesive wafer having a stomal aperture that is manually shapeable by folding or rolling back a rim portion of the adhesive around the stomal aperture. | 05-03-2012 |
20120283678 | CONTROLLED EVACUATION OSTOMY APPLIANCE - A controlled evacuation ostomy appliance comprises a pouch having a non-entrant stoma seal and a retainer for retaining the lower portion of the pouch in the folded-up condition. The appliance optionally includes a body fitment that may include a region of manually moldable adhesive for forming a custom fit at the stoma. | 11-08-2012 |
20130085463 | OSTOMY POUCH WITH FILTERING SYSTEM - An ostomy appliance including an ostomy pouch with a filter and a center pleated panel to protect the filter, facilitate deodorization and deter ballooning. | 04-04-2013 |
20140288517 | HIGH BARRIER ELASTOMER FECAL CATHETER OR OSTOMY POUCH - A fecal catheter or ostomy pouch made of an odor barrier material including a thermoplastic elastomer, odor barrier modifier and an antiblocking agent. | 09-25-2014 |
20150059901 | SELF-CLOSING BAG CONNECTOR - A bag connector system includes a first coupling element, with a self-closing seal and a housing having a fluid inlet port and a fluid outlet port, and a second coupling element, with a housing having a fluid inlet end and a fluid outlet end. The fluid inlet end is configured to displace the self-closing seal when inserted into the fluid outlet port of the first coupling element. A bag connector system optionally includes a locking mechanism to maintain the first coupling element and second coupling element in a coupled state. Uncoupling of the first and second coupling elements results in minimal fluid contamination on the outer surfaces of the coupling elements. The bag connector systems provided herein are included in medical appliances for waste management. | 03-05-2015 |
Patent application number | Description | Published |
20100122085 | SYSTEM AND METHOD FOR PROVIDING VARIABLE SECURITY LEVEL IN A WIRELESS COMMUNICATION SYSTEM - A system and method for providing variable security levels in a wireless communication network. The present invention optimizes the often conflicting demands of highly secure wireless communications and high speed wireless communications. According to a preferred embodiment of the present invention, various security sensors are scanned to determine the likely presence of an intruder within a predetermined trust zone. If an intruder is likely present, the security level is changed to the highest setting, and consequently a lower data rate, while the intruder is identified. If the identified intruder is in fact a trusted node, the security level is returned to a lower setting. If the identified intruder is not a trusted node, the security level is maintained at an elevated state while the intruder is within the trust zone. | 05-13-2010 |
20100220684 | HYBRID ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS WTRU AND METHOD - A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data. | 09-02-2010 |
20100246377 | MIMO BEAMFORMING-BASED SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. At a receiver, an FFT is performed on the received data to generate frequency domain received data. Subcarrier demapping is performed to extract data mapped on the assigned subcarriers. A channel estimator generates a channel matrix which is decomposed into U, D and V | 09-30-2010 |
20110142094 | ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING-CODE DIVISION MULTIPLE ACCESS SYSTEM - An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data. | 06-16-2011 |
20110280210 | METHOD AND APPARATUS FOR ACCESSING AN UPLINK RANDOM ACCESS CHANNEL IN A SINGULAR CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble. | 11-17-2011 |
20120008617 | HYBRID ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS WTRU AND METHOD - A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data. | 01-12-2012 |
20120128158 | SYSTEM AND METHOD FOR PROVIDING VARIABLE SECURITY LEVEL IN A WIRELESS COMMUNICATION SYSTEM - A system and method for providing variable security levels in a wireless communication network. The present invention optimizes the often conflicting demands of highly secure wireless communications and high speed wireless communications. According to a preferred embodiment of the present invention, various security sensors are scanned to determine the likely presence of an intruder within a predetermined trust zone. If an intruder is likely present, the security level is changed to the highest setting, and consequently a lower data rate, while the intruder is identified. If the identified intruder is in fact a trusted node, the security level is returned to a lower setting. If the identified intruder is not a trusted node, the security level is maintained at an elevated state while the intruder is within the trust zone. | 05-24-2012 |
20130100995 | HYBRID ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS WTRU AND METHOD - A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data. | 04-25-2013 |
20130129092 | SYSTEM AND METHOD FOR PROVIDING VARIABLE SECURITY LEVEL IN A WIRELESS COMMUNICATION SYSTEM - A system and method for providing variable security levels in a wireless communication network. The present invention optimizes the often conflicting demands of highly secure wireless communications and high speed wireless communications. According to a preferred embodiment of the present invention, various security sensors are scanned to determine the likely presence of an intruder within a predetermined trust zone. If an intruder is likely present, the security level is changed to the highest setting, and consequently a lower data rate, while the intruder is identified. If the identified intruder is in fact a trusted node, the security level is returned to a lower setting. If the identified intruder is not a trusted node, the security level is maintained at an elevated state while the intruder is within the trust zone. | 05-23-2013 |
20140185654 | ORTHOGONAL FREEQUENCY DIVISION MULTIPLEXING-CODE DIVISION MULTIPLE ACCESS SYSTEM - An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data. | 07-03-2014 |
20140204899 | HYBRID ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS WTRU AND METHOD - A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data. | 07-24-2014 |
20150044994 | SYSTEM AND METHOD FOR PROVIDING VARIABLE SECURITY LEVEL IN A WIRELESS COMMUNICATION SYSTEM - A system and method for providing variable security levels in a wireless communication network. The present invention optimizes the often conflicting demands of highly secure wireless communications and high speed wireless communications. According to a preferred embodiment of the present invention, various security sensors are scanned to determine the likely presence of an intruder within a predetermined trust zone. If an intruder is likely present, the security level is changed to the highest setting, and consequently a lower data rate, while the intruder is identified. If the identified intruder is in fact a trusted node, the security level is returned to a lower setting. If the identified intruder is not a trusted node, the security level is maintained at an elevated state while the intruder is within the trust zone. | 02-12-2015 |