Patents by Inventor Fengjun Xi

Fengjun Xi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10341992
    Abstract: A method and apparatus for transmitting using beam are disclosed. A wireless transmit/receive unit (WTRU) may transmit a first physical random access channel (PRACH) preamble to a base station using a first beam at a first power level. The WTRU may receive an indication that the first PRACH preamble was received by the base station. If the indication was received, the WTRU may transmit data. If the indication was not received, the WTRU may select the first beam or a second beam to use for a second PRACH preamble. Further, the first and second beams may be different beams. If the first beam is selected, the WTRU may increase a transmission power level of the second PRACH preamble by a first power ramp step. If the second beam is selected, the WTRU may not increase the transmission power level of the second PRACH preamble by the first power ramp step.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: July 2, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Benoit Pelletier, Lujing Cai, Hong O. Zhang, Fengjun Xi, Joseph S. Levy
  • Patent number: 10334475
    Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: June 25, 2019
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Fengjun Xi, Hanqing Lou, Oghenekome Oteri, Nirav B. Shah, Robert L. Olesen, Yuan Sheng Jin, Pengfei Xia, Frank La Sita, Guodong Zhang
  • Publication number: 20190191397
    Abstract: Systems, procedures, and instrumentalities are disclosed for synchronization in beamformed systems such as new Radio (NR). A common SYNC channel may be provided for single and multi-beam systems. A SYNC burst structure may be provided for beam-based systems. Procedures enabling or supporting single and multi-beam deployment may provide, for example, a common SYNC for TDD and FDD, a common SYNC for mixed numerologies, SYNC for larger bandwidth and SYNC transmission and reception for single and multiple TRPs.
    Type: Application
    Filed: September 28, 2017
    Publication date: June 20, 2019
    Applicant: Sony Corporation
    Inventors: Kyle Jung-Lin PAN, Chunxuan YE, Fengjun XI, Robert L. OLESEN, Steven FERRANTE
  • Publication number: 20190190655
    Abstract: Systems, methods, and instrumentalities are disclosed for priority-based channel coding for control information. A wireless transmit/receive unit (WTRU) may sort control information associated with a first control information type into a first control information group and the control information associated with a second control information type into a second control information group, for example, based on respective priorities associated with the first and second control information types. The WTRU may group one or more bits of the first control information group into a first bit level control information group and a second bit level control information group based on priority. The WTRU may selectively apply a cyclic redundancy check (CRC) to the first control information group, the second control information group, the first bit level control information group, and/or the second bit level control information group.
    Type: Application
    Filed: August 10, 2017
    Publication date: June 20, 2019
    Applicant: IDAC Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye
  • Publication number: 20190181928
    Abstract: Digital and hybrid spatial modulation are disclosed. A transmitting entity may be configured to perform digital or hybrid spatial modulation. In case of a digital spatial modulation, a transmitting entity may split a plurality of encoded data bits into amplitude phase modulation (APM) bits and virtual antenna index bits. The transmitting entity may modulate the APM bits into modulated data symbols. The transmitting entity may determine a virtual antenna port based on the split virtual antenna index bits and one precoding vector of a set of precoding vectors. The transmitting entity may map the modulated data symbols to a transmission layer based on the virtual antenna port. The transmitting entity may transmit the mapped modulated data symbols. In case of hybrid spatial modulation, the encoded data may be split into physical antenna index bits, and the mapped modulated data symbols may be transmitted via the physical antenna port.
    Type: Application
    Filed: August 10, 2017
    Publication date: June 13, 2019
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Robert L Olesen, Hanqing Lou, Chunxuan Ye
  • Publication number: 20190181983
    Abstract: Systems, methods, and instrumentalities may be disclosed for polar coding. For example, a wireless transmit/receive unit (WTRU) may identify a coding rate and/or an information block length. The WTRU may determine a codeword length, for example, based on the coding rate and/or the information block length. The WTRU may identify a channel condition and/or decoding error statistics. The WTRU may determine a polar code construction type, for example, based on the channel condition and/or the decoding error statistics. The WTRU may determine a design signal to noise ratio (SNR) based on the channel condition and/or the decoding error statistics. The WTRU may determine a polar code based on the information block length, the codeword length, the polar code construction type, and/or the design SNR. The WTRU may encode source bits based on the polar code.
    Type: Application
    Filed: August 10, 2017
    Publication date: June 13, 2019
    Inventors: Chunxuan Ye, Fengjun Xi, Kyle Jung-Lin Pan, Nirav B Shah
  • Patent number: 10312950
    Abstract: Methods, systems, and apparatuses are disclosed for transmitting a plurality of bits to an access point (AP) and receiving constellation symbol from the AP. A constellation symbol may include a plurality of indications of bits. Each indication of the plurality of indications of bits may be associated with a respective wireless transmit/receive unit (WTRU) of a plurality of WTRUs. The plurality of indications of bits may include indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: June 4, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Yuan Sheng Jin, Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Robert L. Olesen
  • Publication number: 20190165906
    Abstract: Systems, methods, and instrumentalities are disclosed for physical (PHY) layer multiplexing of different types of traffic in 5G systems. A device may receive a communication. The communication may include a first traffic type. The device may monitor the communication for an indication that the communication includes a second traffic type that is multiplexed with and/or punctures the first traffic type. An indicator received in the communication and detected by the monitoring may indicate where the second traffic type is located in the communication. The first traffic type and the second traffic type may be multiplexed at a resource element (RE) level. For example, a first traffic type may be punctured by a second traffic type at the RE level. The device may de code one or more of the first or second traffic types in the communication based on the indication.
    Type: Application
    Filed: April 7, 2017
    Publication date: May 30, 2019
    Applicant: IDAC Holdings, Inc.
    Inventors: Erdem Bala, Alphan Sahin, Moon-il Lee, Mihaela C. Beluri, Rui Yang, Janet A. Stern-Berkowitz, Fengjun Xi, Afshin Haghighat
  • Patent number: 10298431
    Abstract: A wireless transmit/receive unit (WTRU) may generate a first signal that utilizes a tail suppression signal generated from data and utilizes a first unique word. Elements of the data and the first signal may be mapped to one or more discrete Fourier transform spread (DFT-S) functions. An inverse DFT on symbols generated by the one or more DFT-S functions may be performed to generate a second signal for transmission.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: May 21, 2019
    Assignee: IDAC Holdings, Inc.
    Inventors: Alphan Sahin, Rui Yang, Fengjun Xi, Oghenekome Oteri, Hanqing Lou, Robert L. Olesen
  • Patent number: 10299227
    Abstract: A method for dynamically controlling the transmit power of transmission streams transmitted via multiple antennas is disclosed. A transmit power level for multiple streams is determined based on a first reference channel. The difference of signal to interface ratios (SIRs) between two reference channels may represent a power offset. The power offset may be used to determine gain factors used to transmit data channels on the secondary stream with reference to the gain factor of the first reference channel. The power offset may be used to determine other parameters, such a serving grant or transport block sizes of channels carried on the secondary stream. The power offset may allow transmission parameters of channels on the secondary stream to be determined based on the transmit power level of the primary stream and a gain factor for a reference channel transmitted via the primary stream.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: May 21, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Lujing Cai, Benoit Pelletier, Hong O. Zhang, Fengjun Xi
  • Publication number: 20190149199
    Abstract: Methods are described for performing joint coded spatial and/or antenna based modulation. A first device may receive, from a second device, one or more pilot signals associated with one or more transmit antennas, antenna patterns, and/or antenna polarizations. The first device may determine channel related information associated with an antenna pair based on the pilot signals. The channel related information may include one or more channel cross correlation coefficients. The first device may determine a set-partition, for example, based on the channel related information. The first device may configure a dynamically configurable Trellis Coded Modulation (TCM) decoder based on the determined set-partition.
    Type: Application
    Filed: May 9, 2017
    Publication date: May 16, 2019
    Inventors: Steven Ferrante, Robert L Olesen, Kyle Jung-Lin Pan, Fengjun Xi, Hanqing Lou
  • Publication number: 20190150117
    Abstract: Modulating millimeter waves may be embodied via a plurality of means. In at least one embodiment of the process disclosed herein, the process includes receiving, at a transmitter, a set of bits. The process also includes generating at least two complex-valued symbols based on the set of bits using a pipelined modulation at least in part by (i) mapping the set of bits to a first symbol using a first constellation mapping and (ii) mapping the set of bits to a second symbol using a second constellation mapping. The process also includes selecting a first data communication resource in a first single carrier channel for the first symbol and selecting a second data communication resource in a second single carrier channel for the second symbol. The process also includes transmitting, via the transmitter, the first and second symbols using the respective selected data communication resources.
    Type: Application
    Filed: May 11, 2017
    Publication date: May 16, 2019
    Inventors: Hanqing Lou, Rui Yang, Fengjun Xi, Nirav B Shah
  • Publication number: 20190140784
    Abstract: Communication devices, systems and methods for performing multi-layer packet coding (MLPC) in a wireless system are provided. The MLPC includes segmenting a data stream into a plurality of data segments, encoding each of the plurality of data segments into a plurality of forward error correction (FEC) codewords, performing a first exclusive OR (XOR) operation on the plurality of FEC codewords to generate a plurality of first layer parity codewords, performing a second XOR operation on the plurality of first layer parity codewords to generate at least one second layer parity codeword, and transmitting at least one of: the plurality of FEC codewords, the plurality of first layer parity codewords, or the at least one second layer parity codeword.
    Type: Application
    Filed: May 9, 2017
    Publication date: May 9, 2019
    Applicant: IDAC HOLDINGS, INC.
    Inventors: Fengjun Xi, Chunxuan Ye, Kyle Jung-Lin Pan, Hanqing Lou, Nirav B. Shah
  • Publication number: 20190103883
    Abstract: Systems, methods, and instrumentalities are disclosed for joint source and polar coding. Source bits may be received and/or ordered based on the priorities of the source bits. The ordered source bits may be grouped. For example, the source bits may be grouped into one or more blocks. The ordered source bits may be distributed among the one or more blocks. For example, the ordered source bits may be distributed among the one or more blocks based on priorities of the ordered source bits. The ordered source bits may be mapped to polar coder ports. For example, the ordered source bits may be mapped to the polar coder ports based on a reliability of the polar codes of the ordered source bits. The transmitter may transmit the mapped ordered source bits of the one or more blocks. Polar encoding of the respective mapped ordered source bits may be performed.
    Type: Application
    Filed: March 28, 2017
    Publication date: April 4, 2019
    Applicant: IDAC Holdings, Inc.
    Inventors: Chunxuan Ye, Fengjun Xi, Kyle Jung-Lin Pan
  • Publication number: 20190090259
    Abstract: Method, apparatuses, and systems for multi-user (MU) transmission is provided, including scheduling, by an access point (AP), an uplink (UL) MU transmission for a group of wireless transmit/receive units (WTRUs) in which there is an indication that at least one resource unit (RU) of a plurality of RUs is silenced. The silencing may be based on coordinating with one or more overlapping APs or by analyzing conditions of channels associated with an AP.
    Type: Application
    Filed: March 9, 2017
    Publication date: March 21, 2019
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome Oteri, Hanqing Lou, Fengjun Xi, Rui Yang
  • Publication number: 20190068425
    Abstract: A wireless transmit/receive unit (WTRU) may generate a first signal that utilizes a tail suppression signal generated from data and utilizes a first unique word. Elements of the data and the first signal may be mapped to one or more discrete Fourier transform spread (DFT-S) functions. An inverse DFT on symbols generated by the one or more DFT-S functions may be performed to generate a second signal for transmission.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Applicant: IDAC Holdings, Inc.
    Inventors: Alphan Sahin, Rui Yang, Fengjun Xi, Oghenekome Oteri, Hanqing Lou, Robert L. Olesen
  • Publication number: 20190028237
    Abstract: A wireless transmit/receive unit (WTRU) may receive a unique word-error check (UW-EC) encoded signal. A pre-decoder data check entity may check for errors based on EC bits and systematic and parity bits from the UW-EC encoded signal. If an error is not detected at the pre-decoder data check entity, data without an error may be signaled to a source decoder without channel decoding.
    Type: Application
    Filed: December 30, 2016
    Publication date: January 24, 2019
    Applicant: IDAC HOLDINGS, INC.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Byung K. Yi, Robert L. Olesen
  • Publication number: 20190021106
    Abstract: Systems, methods, and instrumentalities are disclosed for range extension, basic service set (BSS) color labeling, and multi-user (MU) fragmentation and control in WLANs. A range extension notification/enablement scheme, a clear channel assessment (CCA), a headroom indication, and/or power scaling may be provided for a range extension mode. BSS color may be provided for multiple-BSSs under an access point (AP). Uplink (UL) transmission may be provided with different fragmentation capabilities. A high-efficiency (HE) trigger-based UL NDP physical layer convergence protocol (PLCP) protocol data unit (PPDU) frame may be provided. A station (STA) may receive a trigger frame comprising a null data packet (NDP) indication and a trigger type. The STA may determine that the STA is an intended recipient of the trigger frame. The STA may prepare an NDP PPDU for a control frame and/or a management frame based on the trigger type.
    Type: Application
    Filed: January 13, 2017
    Publication date: January 17, 2019
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome OTERI, Hanqing LOU, Frank LA SITA, Fengjun XI
  • Publication number: 20190013881
    Abstract: Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology, RAT, and/or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.
    Type: Application
    Filed: December 29, 2016
    Publication date: January 10, 2019
    Applicant: IDAC HOLDINGS, INC.
    Inventors: Robert L. Olesen, Rui Yang, Moon-il Lee, Alphan Sahin, Hanqing Lou, Fengjun Xi, Frank La Sita, Byung K. Yi, Janet A. Stern-Berkowitz
  • Publication number: 20180343647
    Abstract: A method and apparatus for transmitting using beam are disclosed. A wireless transmit/receive unit (WTRU) may transmit a first physical random access channel (PRACH) preamble to a base station using a first beam at a first power level. The WTRU may receive an indication that the first PRACH preamble was received by the base station. If the indication was received, the WTRU may transmit data. If the indication was not received, the WTRU may select the first beam or a second beam to use for a second PRACH preamble. Further, the first and second beams may be different beams. If the first beam is selected, the WTRU may increase a transmission power level of the second PRACH preamble by a first power ramp step. If the second beam is selected, the WTRU may not increase the transmission power level of the second PRACH preamble by the first power ramp step.
    Type: Application
    Filed: May 7, 2018
    Publication date: November 29, 2018
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Benoit Pelletier, Lujing Cai, Hong O. ZHANG, Fengjun Xi, Joseph S. Levy