Patents by Inventor Yi-Pin Eric Wang

Yi-Pin Eric Wang 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).

  • Publication number: 20190222302
    Abstract: Systems and methods relating to correction of a Doppler/frequency offset in a wireless communication system are disclosed. In some embodiments, a method of operation of a node comprises estimating a Doppler/frequency offset for a wireless device based on an uplink signal received from the wireless device and providing a frequency adjustment to the wireless device that corrects for the Doppler/frequency offset. In this manner, the Doppler/frequency offset for a wireless device is determined and corrected.
    Type: Application
    Filed: September 19, 2017
    Publication date: July 18, 2019
    Inventors: Xingqin Lin, Ansuman Adhikary, Ali S. Khayrallah, Yi-Pin Eric Wang
  • Patent number: 10356806
    Abstract: A method, in a network node, for transmitting data in a heterogeneous network cellular communication system comprises transmitting of a SFN pilot signal (262). A SFN pilot signal is a pilot signal transmitted by all radio units of a heterogeneous network cell. Optionally, configuration information about non-SFN pilot signals in a cell of the network node is transmitted (260). Non-SFN pilot signals are pilot signals transmitted by less than all radio units of a heterogeneous network cell. The non-SFN pilot signal is transmitted (264). A control channel signal is transmitted (270) on a control channel and a data channel signal associated with the transmitted control channel signal is transmitted (280) on a data channel. A network node operable therefore is also presented. A method for receiving data in a heterogeneous network cellular communication system and a wireless device operable therefore are also presented.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: July 16, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Yi-Pin Eric Wang, Patrik Karlsson, Sairamesh Nammi, Fredrik Ovesjö
  • Publication number: 20190215811
    Abstract: According to some embodiments, a method for use in a frequency-hopping wireless transmitter for transmitting in unlicensed spectrum comprises: obtaining a configuration for a plurality of frequency channels in unlicensed spectrum; and transmitting a data transmission according to a frequency-hopping pattern across the plurality of frequency channels. The configuration for the plurality of frequency channels comprises a first subset of frequency channels for downlink transmission and a second subset of frequency channels for uplink transmission. The frequency channels in the first and second subsets are mutually exclusive. In some embodiments the first and second subset of frequency channels each comprise 160 frequency channels in the 2.4 GHz band, or 50 frequency channels in the 915 MHz band.
    Type: Application
    Filed: August 31, 2017
    Publication date: July 11, 2019
    Inventors: Amitav Mukherjee, Xingqin Lin, Yi-Pin Eric Wang, Cagatay Capar, Jung-Fu Cheng, Havish Koorapaty
  • Publication number: 20190215121
    Abstract: A user equipment (16) is configured for operation in a narrowband wireless communication system (10). The user equipment (16) is configured to detect receipt of a narrowband positioning reference signal (20) that comprises a narrowband reference signal sequence. The narrowband reference signal sequence is a subsequence of a wideband reference signal sequence. The wideband reference signal sequence is configured for a wideband frequency bandwidth that is wider than a maximum frequency bandwidth defined for the narrowband wireless communication system (10). The user equipment (16) is also configured to perform a positioning measurement using the narrowband positioning reference signal (20).
    Type: Application
    Filed: September 29, 2017
    Publication date: July 11, 2019
    Inventors: Xingqin Lin, Johan Bergman, Fredrik Gunnarsson, Olof Liberg, Sara Modarres Razavi, Henrik Rydén, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20190215815
    Abstract: A method performed by a user equipment (UE) in idle mode, for determining common search space (CSS) for NB-IoT paging is disclosed. The method comprises determining a set of periodic subframes as a Paging Occasion (PO) subframe pattern. The method further comprises monitoring a starting subframe of paging CSS for a Radio Network Temporary Identifier (RNTI). The starting subframe of paging CSS is determined as follows: a first subframe (SF0) defined by the Paging Occasion subframe pattern, is used when SF0 is determined to be a valid downlink subframe. A next valid downlink subframe after SF0 is used when SF0 is determined to be an invalid downlink subframe.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 11, 2019
    Inventors: Yufei Blankenship, Yutao Sui, Yi-Pin Eric Wang, Asbjörn Grövlen, Hazhir Shokri Razaghi, Xingqin Lin, Ansuman Adhikary, Johan Bergman
  • Patent number: 10341077
    Abstract: The present invention relates to a method for transmitting channel quality indicators, the method being performed in a wireless device served by a first radio network node of a wireless communication network. The wireless device receives a reference signal from the first radio network node and information relating to an interfering transmission of a second radio network node. It estimates a first channel quality based on the reference signal, and a second channel quality based on the reference signal and on the information relating to the interfering transmission, wherein the second channel quality indicates a channel quality for which the information relating to the interfering transmission, wherein the second channel quality indicates a channel quality for which the interfering transmission has been cancelled. Corresponding first and second channel quality indicators are determined and transmitted to the first radio network node.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: July 2, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Sairamesh Nammi, Andres Reial, Yi-Pin Eric Wang
  • Publication number: 20190200340
    Abstract: A method in a network node includes communicating, over a narrowband Internet of Things downlink, a first message to a first wireless device during repetition periods of at least a first time frame and a second time frame of a plurality of time frames of a transmission time of a narrowband physical downlink control channel (NB-PDCCH) or a narrowband physical downlink shared channel (NB-PDSCH). Each time frame of the plurality of time frames includes a repetition period and a gap. The method also includes communicating a second message to a second wireless device during a gap of the first time frame.
    Type: Application
    Filed: February 14, 2019
    Publication date: June 27, 2019
    Inventors: Hazhir Shokri Razaghi, Ansuman Adhikary, Johan Bergman, Yufei Blankenship, Asbjörn Grövlen, Xingqin Lin, Yutao Sui, Yi-Pin Eric Wang
  • Patent number: 10333754
    Abstract: A user equipment (12) is configured to determine a length-6 phase coefficient sequence that is one of multiple unique length-6 phase coefficient sequences in a defined set (18). The length-6 phase coefficient sequences in the defined set (18) include at least: {1, 1, 1, 1, 3, ?3} and {?3, 3, ?3, 1, 1, ?3}; or {?1, ?1, ?1, 3, ?3, ?1} and either {3, ?3, 3, ?1, 3, 3} or {1, 3, 1, ?1, ?1, 3}. The user equipment (12) is also configured to generate a quadrature phase shift keying, QPSK-based sequence that comprises a sequence of QPSK symbols whose respective phases are based on the determined phase coefficient sequence. The user equipment (12) is further configured to generate a reference signal (16) using the generated QPSK-based sequence, and transmit the generated reference signal (16) to a network node (14) in a wireless communication system (10).
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: June 25, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ansuman Adhikary, Yufei Blankenship, Asbjörn Grövlen, Xingqin Lin, Vidit Saxena, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20190182764
    Abstract: A radio network node may operate in a normal or restricted operating state. In the restricted operating state, the radio network node may have just enough activity to enable UEs to detect the cell. The radio access node may transition to the normal operating state in response to messaging from a wireless communication device, such as reception of a random access preamble.
    Type: Application
    Filed: March 1, 2017
    Publication date: June 13, 2019
    Inventors: Ali NADER, Yi-Pin Eric WANG, Ansuman ADHIKARY
  • Publication number: 20190159232
    Abstract: A user equipment is configured for use in a wireless communication system. The user equipment in particular is configured to receive from a base station one or more configuration messages that indicate a pattern of downlink transmission gaps in time. The user equipment is further configured to receive from the base station a scheduled downlink transmission that comprises a downlink data block and one or more repetitions of the downlink data block. The scheduled downlink transmission is received with downlink transmission gaps therein according to the indicated pattern. Alternatively or additionally, the user equipment is configured to transmit a scheduled uplink transmission that comprises an uplink data block and one or more repetitions of the uplink data block. In this case, the scheduled uplink transmission is transmitted with uplink transmission gaps therein according to an uplink transmission gap pattern that specifies a pattern of uplink transmission gaps in time.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 23, 2019
    Inventors: Ali Nader, Andreas Höglund, Béla Rathonyi, Yi-Pin Eric Wang
  • Patent number: 10298373
    Abstract: A radio base station, user equipment (UE), and method of control signaling in wireless communication systems. Control information is transferred from a base station to at least one UE, via a plurality of common pilot channels. A set of unique pilot sequences is predefined, and the base station assigns specific pilot sequences from the set of pilot sequences to specific common pilot channels, forming a pilot sequence assignment pattern representing specific control information. The UE, having knowledge of the relations between pilot sequence assignment patterns and control information, interprets the received pilot sequence assignment pattern as specific control information. The method is particularly well suited for broadcast type control information.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: May 21, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Yi-Pin Eric Wang, Jung-Fu Cheng, Stephen Grant, Karl J. Molnar, Leonid Krasny
  • Publication number: 20190149204
    Abstract: A block coding method and system for improving the reliability of Channel Quality Indicators (CQI) and Antenna Weight Indicators (AWI) reporting, A user terminal first generates 8-bit CQI and 2-bit AWI. A codeword generator produces a codeword responsive to these 10 CQI/AWI bits using a codebook or a generator matrix of a (20,10,6) code. The (20,10,6) code has a minimum Hamming distance of 6. The encoded codeword is transmitted to a receiver for decoding utilizing an identical (20,10,6) codebook.
    Type: Application
    Filed: January 9, 2019
    Publication date: May 16, 2019
    Inventors: Jung-Fu Cheng, Yi-Pin Eric Wang, Stephen Grant
  • Publication number: 20190150109
    Abstract: Systems and methods relating to a narrowband Primary Synchronization Signal (NB-PSS) and a narrowband Secondary Synchronization Signal (NB-SSS) are disclosed. In some embodiments, a base station in a wireless network comprises a processor and storage that stores instructions executable by the processor whereby the base station is operable to transmit a NB-PSS and a NB-SSS in a narrowband portion of a downlink system bandwidth. The NB-PSS and the NB-SSS are transmitted such that more than two occurrences of the NB-PSS and more than two occurrences of the NB-SSS are transmitted over a defined time interval, each occurrence of the NB-PSS is transmitted over multiple contiguous Orthogonal Frequency Division Multiplexing (OFDM) symbols and each occurrence of the NB-SSS is transmitted over multiple contiguous OFDM symbols, and each occurrence of the NB-SSS provides an indication of a location of the occurrence of the NB-SSS within the defined time interval.
    Type: Application
    Filed: January 8, 2019
    Publication date: May 16, 2019
    Inventors: Xingqin Lin, Ansuman Adhikary, Niklas Johansson, Yi-Pin Eric Wang
  • Publication number: 20190141705
    Abstract: A wideband carrier (e.g., LTE carrier) is shifted up or down in frequency, within an allocated frequency band, by an integer multiple of the channel raster spacing (e.g., 100 KHz). This reduces the size of the guard band on one side of the carrier, and expands the guard band on the other side. A narrowband carrier (e.g., NB-IoT carrier) is then deployed within the expanded guard band, at or near a frequency such that the transmission is orthogonal to the wideband carrier transmissions, such as by using a shared N frequency grid spacing (e.g. at 100 KHz spacing, and using 15 KHz subcarriers). The narrowband carrier thus maintains orthogonality with the wideband carrier, but has “room” within the expanded guard band to both transmit on a frequency close to the frequency grid spacing, and to boost transmit power (e.g., by 6 dB), while remaining within the spectral mask. The shifted wideband carrier is transparent to wideband UEs, as the frequency shift is an integer multiple of the channel raster spacing.
    Type: Application
    Filed: February 6, 2017
    Publication date: May 9, 2019
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Spendim DALIPI, Dominique EVERAERE, Asbjörn GRÖVLEN, Kenneth SANDBERG, Yutao SUI, Yi-Pin Eric WANG
  • Publication number: 20190141751
    Abstract: A wireless communication device (14) (e.g., a user equipment) in a wireless communication system (10) is configured for transmitting a random access preamble signal (16). The wireless communication device (14) in particular is configured to generate a random access preamble signal (16) that comprises multiple symbol groups (18), with each symbol group (18) on a single tone during a different time resource, according to a frequency hopping pattern that hops the random access preamble signal (16) a fixed frequency distance at one or more symbol groups (18) and hops the random access preamble signal (16) a pseudo random frequency distance at one or more other symbol groups (18). Each symbol group (18) comprises one or more symbols. The wireless communication device (14) is also configured to transmit the random access preamble signal (16).
    Type: Application
    Filed: January 27, 2017
    Publication date: May 9, 2019
    Inventors: Xingqin Lin, Ansuman Adhikary, Johan Bergman, Yufei Blankenship, Asbjörn Grövlen, Hazhir Shokri Razaghi, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20190116066
    Abstract: A receiver baseband processor and method for performing preamble detection and Time-of-Arrival, ToA, estimation for a single-tone frequency hopping random access preamble. The processor FFT processes a received signal and identifies logical tones. For each logical tone, the processor reads received symbols; determines a ToA estimate; forms a statistic based on the ToA estimate; compares the statistic to a preamble threshold; and when the statistic is greater than or equal to the threshold, determines a preamble is present and utilizes the ToA estimate for a timing advance command.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 18, 2019
    Inventors: Xingqin LIN, Yi-Pin Eric WANG, Ansuman ADHIKARY
  • Patent number: 10251180
    Abstract: A method in a network node includes communicating, over a narrowband Internet of Things downlink, a first message to a first wireless device during repetition periods of at least a first time frame and a second time frame of a plurality of time frames of a transmission time of a narrowband physical downlink control channel (NB-PDCCH) or a narrowband physical downlink shared channel (NB-PDSCH). Each time frame of the plurality of time frames includes a repetition period and a gap. The method also includes communicating a second message to a second wireless device during a gap of the first time frame.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: April 2, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Hazhir Shokri Razaghi, Ansuman Adhikary, Johan Bergman, Yufei Blankenship, Asbjörn Grövlen, Xingqin Lin, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20190098671
    Abstract: An example method in a user equipment comprises generating a random access preamble signal and transmitting the random access preamble signal. This generating of the random access preamble signal comprises generating a random access preamble signal comprising two or more consecutive preamble symbol groups, each preamble symbol group comprising a cyclic prefix portion and a plurality of identical symbols occupying a single subcarrier of the random access preamble signal. The single subcarrier for at least one of the preamble symbol groups corresponds to a first subcarrier frequency and the single subcarrier for an immediately subsequent one of the preamble symbol groups corresponds to a second subcarrier frequency.
    Type: Application
    Filed: November 28, 2018
    Publication date: March 28, 2019
    Inventors: Xingqin Lin, Ansuman Adhikary, Asbjörn Grövlen, Dennis Hui, Niklas Johansson, Yutao Sui, Mårten Sundberg, Yi-Pin Eric Wang
  • Patent number: 10244346
    Abstract: Systems and method of determining a position of a wireless device are presented. In one exemplary embodiment, a method is performed by a network node (201, 207, 300, 400, 500, 700, 800, 900) for determining a position of a wireless device (209) in a wireless communication system (200). Further, the method may include determining (601) a set (221) of one or more radio resources on which positioning measurements are to be performed by a group (210) of cells (211, 213, 215) on a device-unique reference signal (217) transmitted by the wireless device. Further, the method may include assigning (603) the set or individual radio resources in the set to the group of cells.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: March 26, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xingqin Lin, Olof Liberg, Sara Modarres Razavi, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20190075594
    Abstract: A communications network is being accessed by a wireless device associated with a coverage class selected from a set of coverage classes. The wireless device performs a method comprising initiating network access to the communications network by transmitting a preamble sequence for random access on a physical random access channel during a starting opportunity defined by the coverage class of the wireless device. Each coverage class may be associated with a unique number of repetitions of the pre-amble sequence transmission.
    Type: Application
    Filed: March 10, 2017
    Publication date: March 7, 2019
    Inventors: Xingqin Lin, Ansuman Adhikary, Johan Mikael Bergman, Yufei Blankenship, Asbjörn Grövlen, Hazhir Shokri Razaghi, Yutao Sui, Yi-Pin Eric Wang