Patents by Inventor Xiaoming Lai

Xiaoming Lai 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: 11937138
    Abstract: A network node, wireless device, method and system are provided. In one or more embodiments, a network node (16) for servicing a plurality of wireless devices (22) using a plurality of carriers is provided. Each carrier of the plurality of carriers is configured with a respective plurality of beams. The network node (16) includes processing circuitry (68) configured to: determine a metric associated with Multiple User-Multiple Input Multiple Output, MU-MEMO, usage with respect to the plurality of carriers, and initiate at least one handover of at least one of the plurality of wireless devices (22) to a different carrier of the plurality of carriers based at least in part on the metric.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: March 19, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xiaoming Lai, Weigang Li, Xixian Chen, Dongsheng Yu
  • Publication number: 20230276416
    Abstract: A method for a network node to adaptively configure bandwidth parts, BWPs, for a wireless device, WD, is provided. The method includes selecting at least one use case to be assigned to at least one BWP, the selecting being based at least in part on a WD context. The method further includes adaptively configuring at least one BWP for the WD based on the selected at least one use case. In addition, a method for a WD supporting communication with a network node is provided. Further, corresponding apparatuses for the network node and the WD are provided.
    Type: Application
    Filed: August 13, 2020
    Publication date: August 31, 2023
    Inventors: Xiaoming LAI, Hatem ABOU-ZEID
  • Publication number: 20220322366
    Abstract: According to certain embodiments, a method for use in a network node for scheduling wireless transmissions using a plurality of multi-user multiple-input multiple-output (MU-MIMO) transmission layers comprises determining a first wireless device is spatially pairable with a second wireless device and that a scheduling priority of the first device is higher than the second device. The method further comprises allocating frequency domain resources of a first transmission layer for the first device according to its scheduling priority and allocating frequency domain resources in a second transmission layer for the second device according to the priority of the first device. The amount of frequency domain resources allocated in the second transmission layer is no larger than that allocated in the first transmission layer. The method further comprises transmitting the data to first wireless device on first transmission layer and to second wireless device on the second transmission layer.
    Type: Application
    Filed: August 9, 2019
    Publication date: October 6, 2022
    Inventors: Dongsheng Yu, Xixian Chen, Xiaoming Lai, Weigang LI
  • Publication number: 20220312432
    Abstract: According to certain embodiments, a method for use in a network node for scheduling wireless transmissions comprises determining a channel quality weight for a first wireless channel based on its number of information bits and a channel quality weight for a second wireless channel based on its number of information bits. The number of information bits is based on a signal to interference plus noise (SINR) measurement and a modulation coding scheme of the wireless channels. The method further comprises determining a scheduling weight for the first wireless device based on the channel quality weight for the first wireless channel, determining a scheduling weight for the second wireless device based on the channel quality weight for the second wireless channel, and scheduling a transmission to one of the first and second wireless devices based on the scheduling weights of the first and second wireless devices.
    Type: Application
    Filed: July 2, 2019
    Publication date: September 29, 2022
    Inventors: Xixian Chen, Dongsheng YU, Xiaoming Lai, Weigang Li
  • Publication number: 20220225269
    Abstract: Methods and apparatuses are provided for network testing. In one embodiment, a method in an unmanned vehicle includes controlling a movement of the unmanned vehicle carrying the UE according to a testing location algorithm, the testing location algorithm comprising moving the unmanned vehicle carrying the UE to at least one candidate testing location, determining at least one measurement value at the at least one candidate testing location and determining a reference location based at least in part on the determined at least one measurement value. In another embodiment, a method in a network node initiating a launch of at least one unmanned vehicle of a plurality the unmanned vehicle carrying the UE to at least one candidate testing of unmanned vehicles, each of the at least one unmanned vehicle moving one of the plurality of UEs to a reference location, each reference location corresponding to a testing location.
    Type: Application
    Filed: June 21, 2019
    Publication date: July 14, 2022
    Inventors: Xiaoming LAI, Weigang LI, Xixian CHEN, Dongsheng YU
  • Patent number: 11272398
    Abstract: A method and base station for distributing wireless device traffic load in a wireless communication system having a plurality of base stations are provided. A method includes determining a wireless device traffic load on a serving base station of the plurality of base stations. The method also includes determining a priority for each of a plurality of target base stations of the plurality of base stations, the priority being based at least in part on a number of wireless devices being served by the serving base station that receive a signal from a corresponding target base station that exceeds a threshold. The method further includes determining whether to change the load of the serving base station and sending a load change request to a target base station having a highest priority based on a comparison of the load on the serving base station to a load change threshold.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: March 8, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xiaoming Lai, Xixian Chen, Weigang Li
  • Publication number: 20210400551
    Abstract: A network node, wireless device, method and system are provided. In one or more embodiments, a network node (16) for servicing a plurality of wireless devices (22) using a plurality of carriers is provided. Each carrier of the plurality of carriers is configured with a respective plurality of beams. The network node (16) includes processing circuitry (68) configured to: determine a metric associated with Multiple User-Multiple Input Multiple Output, MU-MEMO, usage with respect to the plurality of carriers, and initiate at least one handover of at least one of the plurality of wireless devices (22) to a different carrier of the plurality of carriers based at least in part on the metric.
    Type: Application
    Filed: November 12, 2018
    Publication date: December 23, 2021
    Inventors: Xiaoming LAI, Weigang LI, Xixian CHEN, Dongsheng YU
  • Patent number: 10651885
    Abstract: A wireless communication device is provided. The wireless communication device comprises a transceiver; an antenna connected to the transceiver through a transmission path; and a compensation circuit configured to or operative to compensate for a passive intermodulation (PIM) interference on the transmission path, the compensation circuit generating a PIM estimate signal based on a transmit signal and a PIM error signal.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: May 12, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xiaoming Lai, Renyuan Li
  • Patent number: 10555234
    Abstract: Methods and apparatus are disclosed for handing over of a high-speed mobile terminal or user equipment from a source network node to a target network node. Reliable methods for measuring the speed of a moving user equipment are disclosed. Parameters used in a handover procedure are also adjusted in accordance with the speed of the user equipment. For handing over a high-speed user equipment, the present application discloses that the source network node can coordinate with the target network node and other candidate network nodes in transmitting a handover command to prevent handover failures.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: February 4, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xiaoming Lai, Xixian Chen, Weigang Li
  • Publication number: 20190363750
    Abstract: A wireless communication device is provided. The wireless communication device comprises a transceiver; an antenna connected to the transceiver through a transmission path; and a compensation circuit configured to or operative to compensate for a passive intermodulation (PIM) interference on the transmission path, the compensation circuit generating a PIM estimate signal based on a transmit signal and a PIM error signal.
    Type: Application
    Filed: September 21, 2016
    Publication date: November 28, 2019
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xiaoming LAI, Renyuan LI
  • Publication number: 20190274066
    Abstract: A method and base station for distributing wireless device traffic load in a wireless communication system having a plurality of base stations are provided. A method includes determining a wireless device traffic load on a serving base station of the plurality of base stations. The method also includes determining a priority for each of a plurality of target base stations of the plurality of base stations, the priority being based at least in part on a number of wireless devices being served by the serving base station that receive a signal from a corresponding target base station that exceeds a threshold. The method further includes determining whether to change the load of the serving base station and sending a load change request to a target base station having a highest priority based on a comparison of the load on the serving base station to a load change threshold.
    Type: Application
    Filed: July 25, 2016
    Publication date: September 5, 2019
    Inventors: Xiaoming LAI, Xixian CHEN, Weigang LI
  • Patent number: 10015218
    Abstract: According to certain embodiments, methods and systems for providing broadcast multicast service include transmitting, by a network node, a first transmission of multicast content data to wireless devices at a first quality of service level and a second transmission of multicast content data to the wireless devices at a second quality of service level. The second quality of service level may be of a higher quality of service than the first quality of service. Feedback may be received from at least one wireless device in the broadcast service area. In response to the feedback from the wireless devices, one or more transmission parameters associated with a subsequent transmission of the multicast content data may be adjusted.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: July 3, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xixian Chen, Xiaoming Lai, Weigang Li
  • Patent number: 9907111
    Abstract: A mobile phone network node may determine traffic load associated with a mobile phone network and initiate discontinuous transmission at a frame level, based at least in part upon, determining that the traffic load is less than a first threshold. The mobile phone network node may further initiate discontinuous transmission at a subframe level, based at least in part upon, determining that the traffic load is greater than the first threshold and less than a second threshold and initiate discontinuous transmission at a symbol level, based at least in part upon, determining that the traffic load is greater than the second threshold.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: February 27, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Weigang Li, Xiaoming Lai, Xixian Chen
  • Patent number: 9578583
    Abstract: Methods and apparatus are disclosed for handing over of a high-speed mobile terminal or user equipment from a source network node to a target network node. Reliable methods for measuring the speed of a moving user equipment are disclosed. Parameters used in a handover procedure are also adjusted in accordance with the speed of the user equipment. For handing over a high-speed user equipment, the present application discloses that the source network node can coordinate with the target network node and other candidate network nodes in transmitting a handover command to prevent handover failures.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: February 21, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xiaoming Lai, Xixian Chen, Weigang Li
  • Publication number: 20170034758
    Abstract: Methods and apparatus are disclosed for handing over of a high-speed mobile terminal or user equipment from a source network node to a target network node. Reliable methods for measuring the speed of a moving user equipment are disclosed. Parameters used in a handover procedure are also adjusted in accordance with the speed of the user equipment. For handing over a high-speed user equipment, the present application discloses that the source network node can coordinate with the target network node and other candidate network nodes in transmitting a handover command to prevent handover failures.
    Type: Application
    Filed: October 14, 2016
    Publication date: February 2, 2017
    Inventors: Xiaoming Lai, Xixian Chen, Weigang Li
  • Patent number: 9496939
    Abstract: A node (28) of a radio access network (20) communicates over a radio interface (32) with a wireless terminal (30). The node (28) comprises a transmitter (34) and a controller (40). The transmitter (34) selectively operates in plural multiple input multiple output (MIMO) modes for downlink transmission over the radio interface (32). The controller (40) uses both a terminal speed value and a throughput value to make a determination when to switch between the plural multiple input multiple output (MIMO) modes for communicating with the wireless terminal. The plural MIMO modes comprise a first mode and a second mode. In the first mode open loop MIMO operates with cyclical diversity delay. In the second mode open loop MIMO operates without cyclical diversity delay. Although operating in open loop MIMO, advantages such as those of closed loop MIMO are realized.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: November 15, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xixian Chen, Peter Deane, Xiaoming Lai
  • Publication number: 20160241615
    Abstract: According to certain embodiments, methods and systems for providing broadcast multicast service include transmitting, by a network node, a first transmission of multicast content data to wireless devices at a first quality of service level and a second transmission of multicast content data to the wireless devices at a second quality of service level. The second quality of service level may be of a higher quality of service than the first quality of service. Feedback may be received from at least one wireless device in the broadcast service area. In response to the feedback from the wireless devices, one or more transmission parameters associated with a subsequent transmission of the multicast content data may be adjusted.
    Type: Application
    Filed: October 20, 2014
    Publication date: August 18, 2016
    Inventors: Xixian Chen, Xiaoming LAI, Weigang LI
  • Patent number: 9380576
    Abstract: An apparatus for allocating radio resources shared among a plurality of network operators is provided. Each network operator has at least one scheduling entity, SE, and a respective resource allocation, RA, probability for being selected for radio resource allocation during a transmission time interval, TTI. The apparatus includes a processor and a memory. The memory contains instructions executable by the processor that are configured to cause the apparatus, within a TTI, to select a network operator of the plurality of network operators for resource allocation within the TTI based at least in part on the RA probability of the network operator, allocate radio resources to an SE of the selected network operator within the TTI and update the RA probability of selecting each of the plurality of network operators for a next selection of resource allocation.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: June 28, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Weigang Li, Xiaoming Lai, Xixian Chen
  • Publication number: 20160157294
    Abstract: A mobile phone network node may determine traffic load associated with a mobile phone network and initiate discontinuous transmission at a frame level, based at least in part upon, determining that the traffic load is less than a first threshold. The mobile phone network node may further initiate discontinuous transmission at a subframe level, based at least in part upon, determining that the traffic load is greater than the first threshold and less than a second threshold and initiate discontinuous transmission at a symbol level, based at least in part upon, determining that the traffic load is greater than the second threshold.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 2, 2016
    Inventors: Weigang Li, Xiaoming Lai, Xixian Chen
  • Patent number: 9215744
    Abstract: A mobile phone network node may determine traffic load associated with a mobile phone network and initiate discontinuous transmission at a frame level, based at least in part upon, determining that the traffic load is less than a first threshold. The mobile phone network node may further initiate discontinuous transmission at a subframe level, based at least in part upon, determining that the traffic load is greater than the first threshold and less than a second threshold and initiate discontinuous transmission at a symbol level, based at least in part upon, determining that the traffic load is greater than the second threshold.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: December 15, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Weigang Li, Xiaoming Lai, Xixian Chen