Patents by Inventor Yufei Wu

Yufei Wu 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: 9801166
    Abstract: Uplink control channel resource allocation for an enhanced downlink control channel is disclosed. A first example method disclosed herein includes receiving, at a user equipment (UE), a downlink control channel carrying a physical uplink control channel (PUCCH) resource indicator, mapping the PUCCH resource indicator to a first offset, mapping a position of the downlink control channel to a second offset, and mapping a linear combination of the first and second offsets to an index identifying a first PUCCH resource. A second example method disclosed herein includes, in response to receiving, at a UE, an indication of a dynamic resource offset in an enhanced physical downlink control channel (ePDCCH) transmitted in a first ePDCCH set, determining a position of the ePDCCH and a subframe offset, and processing the indication of the dynamic resource offset, the position and the subframe offset to determine an allocated uplink control channel resource for the UE.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: October 24, 2017
    Assignee: BlackBerry Limited
    Inventors: Robert Mark Harrison, Shiwei Gao, Yufei Wu Blankenship
  • Patent number: 9775187
    Abstract: A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: September 26, 2017
    Assignee: BlackBerry Limited
    Inventors: Nam Nguyen, Yufei Wu Blankenship, Sagar Dhakal
  • Patent number: 9763110
    Abstract: A method and relay node for managing a plurality of relay nodes that is moving relative to a source network node, the method comprising: selecting a lead node; connecting the plurality of relay nodes to the lead node; and transmitting a signal to manage mobility of the plurality of relay nodes from the lead node to a network node.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: September 12, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Publication number: 20170245252
    Abstract: A method at a first wireless network element, the method receiving, from a second wireless network element, a plurality of packet data units (PDUs) for a user equipment; transmitting the PDUs to the user equipment (UE); compiling a PDU delivery status report in response to the transmitting of the PDUs; and sending the compiled PDU delivery status report to the second wireless network element.
    Type: Application
    Filed: May 8, 2017
    Publication date: August 24, 2017
    Applicant: BlackBerry Limited
    Inventors: Shiwei GAO, Yufei Wu BLANKENSHIP, Zhijun CAI
  • Patent number: 9742516
    Abstract: A user equipment having a first mechanism to obtain a control region size of a sub-frame of a cell, the user equipment having a processor; and a communications subsystem, wherein the processor and communications subsystem are configured to cooperate to: determine having a first mechanism to obtain a control region size of a sub-frame of the first cell, second cell, or both, whether the user equipment is within an area of the second cell; and utilize, a second mechanism to obtain a control region size of a sub-frame of the second cell while the user equipment is within the area of the second cell.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: August 22, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Song, Chandra Sekhar Bontu, Youn Hyoung Heo, Yufei Wu Blankenship, Yi Yu, Zhijun Cai
  • Publication number: 20170181035
    Abstract: A first wireless access network node receives feedback information from a second wireless access network node that performs data offload for the first wireless access node, the feedback information identifying a user equipment (UE) and including information relating to a buffer condition of a data buffer in the second wireless access network node. In response to the feedback information, performing, by the first wireless access network node, control of the data offload that includes controlling an offload of at least one radio bearer of the UE identified by the feedback information.
    Type: Application
    Filed: February 28, 2017
    Publication date: June 22, 2017
    Inventors: Shiwei Gao, Yufei Wu Blankenship, Rene Waraputra Purnadi, Zhijun Cai, Yi Song, Changhoi Koo
  • Publication number: 20170156132
    Abstract: A method is provided for communication in a cell in a wireless telecommunication system. The method comprises, in a region that would otherwise carry a PDSCH, the region being defined by a number of resource blocks and a number of OFDM symbols, instead transmitting at least one of an uplink grant and a downlink assignment in a plurality of OFDM symbols within a first slot, a second slot, or both slots of the region, wherein the region can use either localized or distributed resources, and wherein the region contains one of: a transmission point-specific reference signal; a UE-specific reference signal; and a cell-specific reference signal.
    Type: Application
    Filed: February 10, 2017
    Publication date: June 1, 2017
    Inventors: Yufei Wu Blankenship, Shiwei Gao, Sophie Vrzic, Hua Xu, Dongsheng Yu
  • Patent number: 9648514
    Abstract: A method at a first wireless network element, the method receiving, from a second wireless network element, a plurality of packet data units (PDUs) for a user equipment; transmitting the PDUs to the user equipment (UE); compiling a PDU delivery status report in response to the transmitting of the PDUs; and sending the compiled PDU delivery status report to the second wireless network element.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: May 9, 2017
    Assignee: BlackBerry Limited
    Inventors: Yufei Wu Blankenship, Zhijun Cai, Shiwei Gao
  • Patent number: 9629025
    Abstract: A first wireless access network node receives feedback information from a second wireless access network node that performs data offload for the first wireless access node. The feedback information relates to one or more of a radio resource usage, a buffer condition, a hardware resource usage or a link quality. In response to the feedback information, the first wireless access network node performs control of the data offload.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: April 18, 2017
    Assignee: BlackBerry Limited
    Inventors: Shiwei Gao, Yufei Wu Blankenship, Rene Waraputra Purnadi, Zhijun Cai, Yi Song, Changhoi Koo
  • Publication number: 20170070915
    Abstract: A first wireless access network node sets a data rate for communication of data between a second wireless access network node and a user equipment (UE) that is concurrently connected to the first wireless access network node and the second wireless access network node. The first wireless access network node sends information relating to the data rate to the second wireless access network node for use by the second wireless access network node in controlling data communication between the second wireless access network node and the UE.
    Type: Application
    Filed: September 12, 2016
    Publication date: March 9, 2017
    Inventors: Yufei Wu Blankenship, Shiwei Gao, Zhijun Cai, Yi Song
  • Patent number: 9590828
    Abstract: A blind spectrum sensing method and device based on fast Fourier transform. The method comprises: the spectrum sensing device receives a signal on an authorized spectrum band, calculates an autocorrelation coefficient of the received signal after sampling and filtering same, then performs a fast Fourier transform of the autocorrelation coefficient, acquires the modulus of the transform result, constructs determination variables on the basis of the modulus, and determine whether or not a signal of an authorized user is present. The method and device have the advantages of low calculation complexity, obviated need for authorization information characteristic, and insensitivity towards noise uncertainty, and are of great performance.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: March 7, 2017
    Assignee: Southeast University
    Inventors: Dongming Wang, Yufei Wu, Ruixun Liu, Xiangyang Wang, Wenrui Tang, Yuqi Huang
  • Publication number: 20170064590
    Abstract: In some examples, a source wireless access network node generates, for a user equipment (UE), a plurality of security configurations, wherein each security configuration of the plurality of security configurations is associated with a different respective candidate target wireless network node in a set of candidate target wireless access network nodes. The source wireless access network node sends each security configuration of the plurality of security configurations to the respective candidate target wireless network node, and sends security information of the plurality of security configurations to the UE.
    Type: Application
    Filed: November 14, 2016
    Publication date: March 2, 2017
    Inventors: Yufei Wu Blankenship, Shiwei Gao
  • Patent number: 9578671
    Abstract: A control plane connection is established between a user equipment (UE) and a first wireless access network node. Signaling in the control plane connection is used for establishing a plurality of connections between the UE and corresponding additional plurality of wireless access network nodes, to communicate user plane data between the UE and the additional wireless access network nodes.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 21, 2017
    Assignee: BlackBerry Limited
    Inventors: Yufei Wu Blankenship, Shiwei Gao, Hua Xu, Zhijun Cai
  • Publication number: 20170041982
    Abstract: Systems, methods, and apparatuses for radio resource control (RRC) signaling in wireless communication networks with data offload are provided. The radio configuration messages from a small cell to a dual connection UE may be sent by an overlay macro E-UTRAN node-B (eNB). The small cell may send the RRC messages to the macro-eNB first via a backhaul link, and the macro-eNB then transmits the messages to the UE. In some implementations, the radio configuration messages from a small cell to a dual connection UE may be sent directly from the small cell. In some other implementations, some of the RRC messages may be sent selectively to/from either the macro-cell or the small cell, or to/from both the macro-cell and the small cell. The type of RRC messages sent over the small cell and/or the macro-cell may be preconfigured or predetermined.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Applicant: BlackBerry Limited
    Inventors: Shiwei GAO, Yufei Wu BLANKENSHIP, Zhijun Cai
  • Publication number: 20160373980
    Abstract: A method and relay node for managing a relay node that is moving relative to a source network node, the method receiving parameters of a target network node from a source network node at the relay node; initiating a direct attachment of the relay node to the target network node; and detaching the relay node from the source network node. Also, a method and network node for managing a relay node that is moving relative to a source network node, the method sending a handover request of a relay node from the source network node to a target network node; performing handover of a plurality of user equipments (UEs) from the source network node to the target network node, wherein the plurality of UEs are attached to the relay node, and establishing an interface between the relay node and the target network node.
    Type: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Patent number: 9497673
    Abstract: A first radio connection is established between a first cell and a user equipment (UE). A network identity of a second cell is determined based on a first set of at least one network identity associated with the first cell, where the second cell is associated with a second set of at least one network identity. The determined network identity is useable for establishing a second radio connection between the second cell and the UE.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: November 15, 2016
    Assignee: BlackBerry Limited
    Inventors: Yufei Wu Blankenship, Shiwei Gao
  • Publication number: 20160323924
    Abstract: A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.
    Type: Application
    Filed: July 7, 2016
    Publication date: November 3, 2016
    Applicant: BlackBerry Limited
    Inventors: Nam NGUYEN, Yufei Wu BLANKENSHIP, Sagar Dhakal
  • Patent number: 9479230
    Abstract: Systems, methods, and apparatuses for radio resource control (RRC) signaling in wireless communication networks with data offload are provided. The radio configuration messages from a small cell to a dual connection UE may be sent by an overlay macro E-UTRAN node-B (eNB). The small cell may send the RRC messages to the macro-eNB first via a backhaul link, and the macro-eNB then transmits the messages to the UE. In some implementations, the radio configuration messages from a small cell to a dual connection UE may be sent directly from the small cell. In some other implementations, some of the RRC messages may be sent selectively to/from either the macro-cell or the small cell, or to/from both the macro-cell and the small cell. The type of RRC messages sent over the small cell and/or the macro-cell may be preconfigured or predetermined.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: October 25, 2016
    Assignee: BlackBerry Limited
    Inventors: Shiwei Gao, Yufei Wu Blankenship, Zhijun Cai
  • Patent number: 9473952
    Abstract: A method and relay node for managing a relay node that is moving relative to a source network node, the method receiving parameters of a target network node from a source network node at the relay node; initiating a direct attachment of the relay node to the target network node; and detaching the relay node from the source network node. Also, a method and network node for managing a relay node that is moving relative to a source network node, the method sending a handover request of a relay node from the source network node to a target network node; performing handover of a plurality of user equipments (UEs) from the source network node to the target network node, wherein the plurality of UEs are attached to the relay node, and establishing an interface between the relay node and the target network node.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: October 18, 2016
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Patent number: 9473279
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises transmitting, by a first access node, an indicator to a second access node over an interface between the first access node and the second access node, wherein the indicator provides information on a transmission of a control channel by the first access node.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: October 18, 2016
    Assignee: BlackBerry Limited
    Inventors: Yufei Wu Blankenship, Shiwei Gao, Hua Xu