Patents by Inventor Yutao Sui

Yutao Sui 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: 20200374083
    Abstract: According to certain embodiments, a method performed by a network node comprises transmitting a transmission of system information. The transmission comprises coded bits obtained by reading from a circular buffer. The transmission is transmitted in a first set of subframes corresponding to subframes #4 of a plurality of radio frames. The method further comprises transmitting an additional transmission of the system information. The additional transmission comprises additional coded bits obtained by continuing reading from the circular buffer. The additional transmission is transmitted in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4.
    Type: Application
    Filed: November 16, 2018
    Publication date: November 26, 2020
    Inventors: Yi-Pin Eric WANG, Magnus ÂSTRÖM, Yutao SUI
  • Publication number: 20200374099
    Abstract: According to certain embodiments, a method (500) by a wireless device (110) includes receiving information relating to a Narrowband Secondary Synchronization Signal (NSSS) transmit diversity scheme. The information indicates a number of NSSS occasions that use different NSSS transmit diversity configurations. Based on the NSSS transmit diversity scheme, at least one measurement is performed across NSSS occasions.
    Type: Application
    Filed: November 23, 2018
    Publication date: November 26, 2020
    Inventors: Olof Liberg, Joakim AXMON, Mats FOLKE, Andreas HÖGLUND, Yutao SUI, Martin VAN DER ZEE, Yi-Pin Eric WANG
  • Publication number: 20200367147
    Abstract: A wireless device (14) is configured for use in a wireless communication network (10). The wireless device (14) is configured to receive, from the wireless communication network (10), information (22) that configures the wireless device (14) to restrict uplink access by the wireless device (14) to the wireless communication network (10), unless and until the wireless device (14) is configured otherwise by other information from the wireless communication network (10). The information (22) may for example indicate that uplink access by the wireless device (14) to the wireless communication network (10) is not allowed. Regardless, the wireless device (14) is configured to restrict uplink access by the wireless device (14) to the wireless communication network (10) in accordance with the received information (22).
    Type: Application
    Filed: December 11, 2018
    Publication date: November 19, 2020
    Inventors: Andreas Höglund, Johan Bergman, Magnus Karlsson, Olof Liberg, Yutao Sui, Emre Yavuz
  • Publication number: 20200359419
    Abstract: Techniques for performing random access in a wireless communications system are presented. For instance, the present disclosure includes which the UE (102) is to transmit a random access preamble while operating within a certain coverage enhancement level. In some examples, the transmission power is determined as a function of a target receive power with which the random access preamble transmission is targeted to be received by a network node (106), and a path loss between the UE (102) and a network node (106). In addition, the method includes transmitting the random access preamble using the determined transmission power while operating within the certain coverage enhancement level. The method also includes determining another transmission power with which the UE (102) is to transmit a connection request in the random access procedure, where the other transmission power is determined as a function of the target receive power with which the random access preamble transmission was targeted to be received.
    Type: Application
    Filed: May 31, 2018
    Publication date: November 12, 2020
    Inventors: Olof Liberg, Andreas Höglund, Yutao Sui
  • Patent number: 10834695
    Abstract: According to certain embodiments, a method is disclosed for use in a wireless device that is configured as a Narrowband Internet-of-Things (NB-IoT) device or a machine-type-communication (MTC) device. The method comprises determining at least one parameter related to positioning. The at least one parameter is based on a capability of the wireless device that relates to observed time difference of arrival (OTDOA) positioning with NB-IoT or MTC. The method further comprises using the determined at least one parameter related to positioning.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 10, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Sara Modarres Razavi, Johan Bergman, Fredrik Gunnarsson, Olof Liberg, Xingqin Lin, Henrik Rydén, Iana Siomina, Yutao Sui
  • Publication number: 20200343938
    Abstract: Methods and apparatus for random access in a TDD NB-IoT system are provided to enable frequency errors at the user equipment and/ or base station to be accounted for, e.g., when determining time alignment or timing advance. In one embodiment, for example, the frequency hopping between symbol groups comprising the preamble enables the recipient of the random access preamble to cancel, nullify, or otherwise mitigate phase errors attributable to such frequency errors.
    Type: Application
    Filed: February 6, 2019
    Publication date: October 29, 2020
    Inventors: Gerardo Agni Medina Acosta, Talha Khan, Olof Liberg, Yutao Sui
  • Publication number: 20200344818
    Abstract: A base station (110) enables a wireless device (120) (e.g., user equipment) to transmit user data on an uplink (130) during random access. The base station (110) transmits a resource grant indicating a plurality of options from which the wireless device (120) is permitted to select for use in transmitting the user data on the uplink (130) during random access. Each respective option comprises a transport block size; and a number of resource units and/or physical resource blocks. The wireless device (120) receives the resource grant, and transmits the user data on the uplink (130) during random access to the base station (110) according to at least one of the options.
    Type: Application
    Filed: January 3, 2019
    Publication date: October 29, 2020
    Inventors: Andreas Höglund, Johan Bergman, Olof Liberg, Dung Pham Van, Yutao Sui, Tuomas Tirronen, Emre Yavuz
  • Publication number: 20200322985
    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 preamble sequence transmission.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Inventors: Xingqin Lin, Ansuman Adhikary, Johan Mikael Bergman, Yufei Blankenship, Asbjörn Grövlen, Hazhir Shokri Razaghi, Yutao Sui, Yi-Pin Eric Wang
  • Patent number: 10798674
    Abstract: Methods and device for use in a wireless device of reporting positioning measurements comprises receiving network assistance information from a network node. The network assistance information is for assisting the wireless device in performing Observed Time Difference Of Arrival (OTDOA), and comprises: a list of reference cells; a list of neighbor cells; and a rule for terminating Reference Signal Time Difference (RSTD) measurements. The method further comprises performing RSTD measurement between a cell in the reference cell list and a cell in the neighbor cell list. Upon determining the RSTD measurement satisfies the rule for terminating RSTD measurements, the method includes reporting the RSTD measurements to the network node. Upon determining the RSTD measurement does not satisfy the rule for terminating RSTD measurements, performing another RSTD measurement between the cell in the reference cell list and a cell in the neighbor cell list.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: October 6, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Sara Modarres Razavi, Johan Bergman, Åke Busin, Fredrik Gunnarsson, Olof Liberg, Xingqin Lin, Henrik Rydèn, Yutao Sui, Martin Van Der Zee
  • Publication number: 20200314910
    Abstract: The load on Random Access channels (N)PRACH (i.e., Msg1) is temporally distributed, to better handle synchronized access peaks from machine type devices. Access attempts by wireless devices are distributed in time, based on their identities (e.g., IMSI, which is used for the distribution of paging load) or random draw. The distribution restricts when 5 wireless devices can access the network, either based on System Frame Number or on random access occurrence. The method is implicit, i.e., after the initial System Information (SI) acquisition, wireless devices will automatically apply temporal network access load distribution according to the configuration provided in SI without any need for explicit signaling or re-acquisition of SI. Embodiments of the invention may be advantageously applied to any wireless 10 communication network supporting machine type communications, such as GPRS/EGPRS/ECGSM-IoT and UMTS/HSPA, as well as non-3GPP radio access technologies such as LoRa, Sigfox, and Ingenu.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 1, 2020
    Inventors: Andreas Höglund, Johan Mikael Bergman, Olof Liberg, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20200267769
    Abstract: Embodiments include methods for a user equipment (UE) to provide downlink (DL) channel-quality reports during a random-access (RA) procedure in a cell provided by a network node in a radio access network (RAN). Such embodiments include receiving, from the network node, a first indicator indicating that the UE may have to report DL channel quality in a particular message of the RA procedure; and initiating the RA procedure. The UE may be configured to operate in a coverage-enhancement (CE) mode. Such embodiments can also include initiating DL channel quality measurements based on the first indicator, wherein the DL channel quality measurements can be initiated before receiving a RA response from the network node. Other embodiments include complementary methods performed by a network node, as well as UEs and network nodes configured to perform the respective methods.
    Type: Application
    Filed: July 29, 2019
    Publication date: August 20, 2020
    Inventors: Johan Bergman, Yutao Sui, Tuomas Tirronen, Emre Yavuz
  • Patent number: 10750504
    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: Grant
    Filed: February 6, 2017
    Date of Patent: August 18, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Spendim Dalipi, Dominique Everaere, Asbjörn Grövlen, Kenneth Sandberg, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20200260502
    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: May 1, 2020
    Publication date: August 13, 2020
    Inventors: Xingqin Lin, Ansuman Adhikary, Asbjörn Grövlen, Dennis Hui, Niklas Johansson, Yutao Sui, Mårten Sundberg, Yi-Pin Eric Wang
  • Publication number: 20200260429
    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: February 19, 2020
    Publication date: August 13, 2020
    Inventors: Yufei Blankenship, Yutao Sui, Yi-Pin Eric Wang, Asbjörn Grövlen, Hazhir Shokri Razaghi, Xingqin Lin, Ansuman Adhikary, Johan Bergman
  • Patent number: 10743186
    Abstract: Embodiments herein relate for example to a method performed by a wireless device in a first wireless communication system that is deployed on a frequency resource. The wireless device receives information indicating a PRB offset and a corresponding channel raster offset. The channel raster offset is an offset in frequency between a channel raster, used by the wireless device (105) in a cell search process, and the frequency resource. The PRB offset indicates an offset between the frequency resource and an inner frequency resource on which a second wireless communication system is deployed. In the frequency domain, the second wireless communication system is deployed on at least one higher frequency resource above the inner frequency resource and at least one lower frequency resource below the inner frequency resource. The wireless device determines, based on the received information, an adjustment in frequency applicable for the frequency resource on which the first wireless communication system is deployed.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 11, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Yutao Sui, Ansuman Adhikary, Johan Bergman, Yufei Blankenship, Asbjörn Grövlen, Xingqin Lin, Hazhir Shokri Razaghi, Yi-Pin Eric Wang
  • Publication number: 20200252858
    Abstract: Enabling a UE to determine whether the UE can skip the acquisition of SIB1-BR. An indication (e.g., a one bit flag) in the MIB is provided, which indication is set to a particular value if the UE needs to read SIB1-BR, otherwise the indication is set to a different value indicating that the UE can skip reading SIB1-BR assuming other conditions are met (e.g., assuming that the UE has previously read SIB1-BR within a MIB indication time period).
    Type: Application
    Filed: May 3, 2018
    Publication date: August 6, 2020
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Yi-Pin Eric WANG, Johan BERGMAN, Andreas HÖGLUND, Olof LIBERG, Antti RATILAINEN, Yutao SUI, Tuomas TIRRONEN, Anders WALLÉN, Emre YAVUZ
  • Publication number: 20200245365
    Abstract: Random Access (RA) formats are defined for NB-IoT operation in TDD mode. The formats are defined to allow use of in the legacy LTE subframe configurations for TDD. The formats specify a predetermined, even number P of symbol groups composing a RA preamble, wherein each symbol group comprises a Cyclic Prefix (CP) and a number X of symbols. The P symbol groups are divided into symbol group sets fitting into 1, or 2, or 3 contiguous uplink subframes, each comprising at least two symbol groups transmitted back-to-back (i.e., contiguously in time), and at least two symbol group sets are transmitted non-contiguously in time across a number of uplink subframes over which the RA preamble is transmitted. The number of symbol groups in a set can be two or three, and the number of symbol groups is four or six, respectively. Symbol groups within a set are transmitted on adjacent uplink subframes. Five format options are defined, which map to various of the LTE TDD configurations.
    Type: Application
    Filed: September 26, 2018
    Publication date: July 30, 2020
    Inventors: Xingqin Lin, Johan Mikael Bergman, Andreas Höglund, Gerardo Agni Medina Acosta, Hazhir Shokri Razaghi, Yutao Sui, Yi-Pin Eric Wang
  • Patent number: 10728930
    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 preamble sequence transmission.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: July 28, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xingqin Lin, Ansuman Adhikary, Johan Mikael Bergman, Yufei Blankenship, Asbjörn Grövlen, Hazhir Shokri Razaghi, Yutao Sui, Yi-Pin Eric Wang
  • Publication number: 20200221442
    Abstract: A method performed by a network node, for planning radio resources for transmissions is provided. The network node establishes (301) that a wireless device is fixed, wherein fixed comprises always being served by the same one or more access points. The network node obtains (302) a configuration comprising an identity of the wireless device and associated parameters to be used for transmissions between the network node and the wireless device. The parameters comprise an identity of the one or more access points serving the wireless device. The parameters further comprise any one or more out of: Time and periodicity, for transmissions between the network node and the wireless device. Based on the configuration, the network node plans (303) radio resources available in the network node for upcoming transmissions between the network node and any wireless device.
    Type: Application
    Filed: June 28, 2018
    Publication date: July 9, 2020
    Inventors: Ritesh Shreevastav, Sofia Brismar, Andreas Höglund, Yutao Sui
  • Publication number: 20200205106
    Abstract: A method performed by a network node for establishing a connection for data transmission between the network node and the wireless device in a wireless communications network is provided. The network node establishes (301) that the wireless device is fixed. Fixed comprises always being served by the same one or more access points. The network node obtains (302) a Timing Advance (TA) for transmissions between the network node and the wireless device, based on the distance between the network node and the wireless device. The obtaining of the TA is performed without UpLink (UL) transmission. The network node sends (303) an indication to the wireless device, which indication indicates the obtained TA. The network node then establishes (304) a connection for data transmission between the network node and the wireless device based on the sent TA in Radio Resource Control, RRC, signaling.
    Type: Application
    Filed: August 8, 2018
    Publication date: June 25, 2020
    Inventors: Ritesh Shreevastav, Sofia Brismar, Andreas Höglund, Yutao Sui