Patents by Inventor Lei Du

Lei Du 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: 20140089300
    Abstract: The present disclosure discloses a method and system for inputting information in mobile terminal as well as terminal. The method includes: the mobile terminal sending a request (101) for acquiring listening list to a server; the mobile terminal receiving user information in the listening list returned by the server; the mobile terminal receiving and storing the user information, matching a character input by a user with the user information, displaying a matching result, and determining input information (103) according to selection of the user. By applying the present disclosure, the traffic of mobile communication can be saved and the success rate of information transmission can be increased.
    Type: Application
    Filed: May 11, 2012
    Publication date: March 27, 2014
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Chuan Peng, Jun Zhang, Difei Chen, Junfeng Zhao, Yaohui Yu, Xu Zhang, Lei Du
  • Patent number: 8681724
    Abstract: A communication system is presented, which is capable of sending a transmission over an interface having at least two aggregated component carriers including a primary component carrier and at least one secondary component carrier, wherein the primary component carrier has a physical downlink control channel (PDCCH) associated therewith and wherein the PDCCH is capable of signaling allocations for the primary component carrier and the at least one secondary component carrier. A method of operating a network element including sending to a user equipment a transmission indication indicative of the transmission in the PDCCH of the primary component carrier. A method of operating a user equipment includes monitoring downlink control signaling for a transmission indication indicative of a transmission to the user equipment only on the PDCCH of the primary component carrier.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: March 25, 2014
    Assignee: Nokia Siemens Networks Oy
    Inventors: Lei Du, Min Huang, Yong Teng
  • Publication number: 20140080531
    Abstract: Methods, apparatuses and a computer program product for Extended Access Barring for machine type communications defining first access class barring parameters, a first scaling factor and a second scaling factor, and transmitting, by a base station, the first access class barring parameters, the first scaling factor and the second scaling factor to user equipment.
    Type: Application
    Filed: May 9, 2011
    Publication date: March 20, 2014
    Applicant: Nokia Siemens Networks Oy
    Inventors: Lei Du, Benoist Pierre Sebire
  • Publication number: 20140080468
    Abstract: There are provided measures for a cell reconfiguration, more specifically a cell reconfiguration in a relay-enhanced network environment. Such measures exemplarily include recognizing a decision on a change of a configuration of a base station, informing a user equipment served by the base station in view of a forthcoming change of the configuration before the configuration of the base station is changed, and providing the user equipment being served by the base station with a synchronization signal indicating a new configuration after the configuration of the base station is changed from an old configuration to the new configuration.
    Type: Application
    Filed: March 31, 2011
    Publication date: March 20, 2014
    Applicant: Nokia Siemens Networks Oy
    Inventors: Shun Liang Zhang, Simone Redana, Bernhard Raaf, Lei Du
  • Publication number: 20140038647
    Abstract: A method and an apparatus for controlling paging for a plurality of devices capable of wireless communication are disclosed in the invention. The method includes the following steps: paging locations in frames are determined for at least one device of the plurality of devices and a paging type indication indicative of a group paging or a dedicated paging is communicated to the at least one device to control calculation of paging locations according to the group paging mode or the dedicated paging mode in a predetermined manner. The device receives the paging type indication and in response thereto calculates the paging locations in received frames according to the group paging mode or the dedicated paging mode.
    Type: Application
    Filed: February 14, 2011
    Publication date: February 6, 2014
    Inventors: Yi Zhang, Lei Du, De Shan Miao, Johanna Katariina Pekonen
  • Patent number: 8604710
    Abstract: The present disclosure discloses a multi-mode dimming circuit configurable to operate in a first dimming mode, a second dimming mode and a third dimming mode. The present disclosure also discloses separate dimming circuits for respectively realize the three dimming modes. In one embodiment the multi-mode dimming circuit may comprise a first input terminal, a second input terminal, a third input terminal, an output terminal, a resistive device, an oscillation circuit and a pulse width modulation (PWM) circuit. Users may flexibly configure the multi-mode dimming circuit to operate in one of the three different dimming modes by varying the external devices and/or signals coupled to each of the first, second and third input terminals.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: December 10, 2013
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Bo Yu, Yuancheng Ren, Lei Du, Naixing Kuang, Zhijiang Yang
  • Patent number: 8598802
    Abstract: The present technology is generally related to Triac dimmer compatible driving circuits and methods thereof. The present technology also provides an electronic transformer that is integrated in the Traic dimmer compatible driving circuit. In one embodiment, the electronic transformer detects the conduction angles of an output AC voltage from the Triac dimmer and converts said output AC voltage into a PWM DC voltage having a duty cycle regulated by said conduction angles. Said PWM DC voltage is then applied to a WLED driver for driving a WLED.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: December 3, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Yong Huang, Lei Du
  • Patent number: 8581518
    Abstract: Triac dimmer compatible switching mode power supplies used as LED drivers are disclosed herein. A PFC controller is configured in the switching mode power supplies. With the PFC controller, the current keeping the triac in the on-state is supplied by the DC/DC converter, and the LC resonance is reduced.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: November 12, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Naixing Kuang, Lei Du, Junming Zhang, Yuancheng Ren
  • Publication number: 20130295950
    Abstract: In accordance with an example embodiment of the present invention, apparatus including a transmitter configured to output information, a processing core configured to obtain information concerning in-device multiradio interference, the processing core being configured to assign at least one priority to at least one channel of a first radio access technology in dependence of the information concerning in-device multiradio interference, and the processing core being configured to cause the transmitter to output channel information including an indication of the at least one priority for transmission to a base station of the first radio access technology.
    Type: Application
    Filed: January 18, 2011
    Publication date: November 7, 2013
    Applicant: Nokia Siemens Networks Oy
    Inventors: Paivi Ruuska, Antti Piipponen, Lei Du
  • Patent number: 8576588
    Abstract: The present technology are directed to switching mode power supplies with primary side control. In one embodiment, the switching mode power supply provides an equivalent current signal which represents a load current. The equivalent current signal is then used to control a switching circuit in the switching mode power supply.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: November 5, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Naixing Kuang, Lei Du, Junming Zhang, Yuancheng Ren
  • Publication number: 20130272190
    Abstract: An access node of a radio access network of a cellular communication system obtains first configuration information for at least one relay node which is capable of being wirelessly connected to the radio access network via the access node and is associated with the access node, wherein the first configuration information includes information on an interface between the access node and the at least one relay node, and transmits the first configuration information to at least one other access node of the radio access network.
    Type: Application
    Filed: December 17, 2010
    Publication date: October 17, 2013
    Applicant: Nokia Siemens Networks Oy
    Inventors: Lei Du, Shun Liang Zhang, Simone Redana
  • Publication number: 20130273890
    Abstract: A method and an apparatus for handling closed subscriber groups in a relay-enhanced system are provided in the invention. The method includes: retrieving setting information relating to closed subscriber groups of a donor base station and a relay node of a relay-enhanced cellular system; acquiring a whitelist defining one or more closed subscriber groups in which a terminal is a member, the terminal requesting access to the relay-enhanced cellular system via the relay node; and verifying (i.e. checking and/or validating) a membership of the terminal for both closed subscriber groups of the donor base station and the relay node based on the retrieved setting information and the acquired whitelist. With the method and apparatus of the invention, user access control via the relay node in the relay-enhanced access networks can be improved.
    Type: Application
    Filed: November 11, 2010
    Publication date: October 17, 2013
    Applicant: Nokia Siemens Networks Oy
    Inventors: Lei Du, Wei Hua Zhou, Bernhard Raaf, Maciej Pakulski
  • Patent number: 8553665
    Abstract: A method for accessing a hybrid network and a gateway communication system are disclosed. The method comprises: sensing by a gateway apparatus a relay request slot on a downlink common control channel of the wide area network; transmitting by a wireless terminal a relay request signal requesting to relay a data packet to be transmitted, in the relay request slot on the downlink common control channel; and if the relay request signal from the wireless terminal is sensed in the relay request slot, establishing by the gateway apparatus a connection with the wireless terminal in a distributed network environment. As such, the gateway apparatus accesses the wireless distributed network only when the surrounding wireless terminals require data relay, without sensing signals on both networks simultaneously.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: October 8, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Lei Du, Yong Bai, Lan Chen, Hidetoshi Kayama
  • Patent number: 8525423
    Abstract: Circuitry and methods for driving a plurality of LED strings are disclosed herein. In one embodiment, the circuitry comprises a plurality of current regulating circuits electrically coupled to the LED strings and are configured to regulate a current flowing through the LED strings. At least two control circuits are coupled to the current regulating circuits and are configured to generate a control signal according to terminal voltages of the corresponding current regulating circuits. A voltage converter is electrically coupled to the LED strings and to the at least two control circuits, and is configured to regulate the DC driving voltage according to the at least two control signals.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: September 3, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Bo Yu, Yuancheng Ren, Lei Du, Naixing Kuang, Zhishun Li
  • Patent number: 8446907
    Abstract: A pair scheduling medium access control method used in a wireless network, comprises the steps of: checking, by a receiving node, whether a transmitting node has data packets to be subsequently sent, according to data packets received from the transmitting node; when the transmitting node has no data packets to be subsequently sent, checking whether the receiving node has data packets to be sent to the transmitting node or not; if the receiving node has data packets to be sent to the transmitting node, then adding a time period required for sending the data packets of the receiving node into an acknowledgement packet to be sent to the transmitting node; after the receiving node receives a Clear to Send packet sent from the transmitting node, sending the data packets in the receiving node to the transmitting node.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: May 21, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Lei Du, Lan Chen, Akira Yamada, Atsushi Fujiwara
  • Publication number: 20130115977
    Abstract: A method includes transmitting a paging indicator indicating to user equipment assigned to one or more groups that the user equipment are to attempt to receive paging messages including paging information targeted to at least one of the one or more groups; and transmitting in a channel the paging information in the paging messages. Another method includes receiving a paging indicator indicating a user equipment is to attempt to receive paging messages including paging information targeted to at least one of one or more groups; and receiving from a channel the paging information in the paging messages. A method includes sending a request message to user equipment assigned to one or more groups, the request message comprising an indication to cause the user equipment to read device trigger information in a system broadcast message; and sending the device trigger information in the system broadcast message.
    Type: Application
    Filed: November 7, 2011
    Publication date: May 9, 2013
    Inventors: Devaki Chandramouli, Guillaume Decarreau, Henri Markus Koskinen, Lei Du, Woonhee Hwang, Xiao Tang Xie
  • Publication number: 20130040605
    Abstract: Improved systems and techniques for controlling access to network resources. A base station broadcasts extended access barring (EAB) and access class barring (ACB) information. Upon a determination by a user equipment that the user equipment requires service from the base station, the user equipment determines its EAB category and call type. The user equipment receives the EAB and ACB information broadcast by the base station and determines if it is subject to EAB based on its EAB category. If the user equipment is not subject to EAB, the user equipment determines if its call type is subject to ACB and, if the call type is subject to ACB, applies access class barring based on its call type.
    Type: Application
    Filed: August 10, 2011
    Publication date: February 14, 2013
    Inventors: Yi Zhang, Robert Zaus, Woonhee Hwang, Lei Du, Devaki Chandramouli
  • Patent number: 8373349
    Abstract: A circuit for controlling the switch frequency of an inverter that strikes and drives fluorescent lamps is disclosed. The circuit comprises a frequency generator and an offset circuit. The offset circuit provides a current signal in response to the lamp status. The frequency generator provides a frequency control signal in respond to the current signal so as to control the switch frequency of the inverter. When the lamp is open, the switch frequency of the inverter is higher; when the lamp is lighted, the switch frequency of the inverter is lower.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: February 12, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junming Zhang, Jiali Cai, Lei Du, Yuancheng Ren, Eric Yang
  • Patent number: 8368320
    Abstract: Methods and circuits for CCFL driving circuit control are disclosed according to various embodiments of the present disclosure. In certain embodiments, the methods and circuits for CCFL driving circuit control provide a control signal for regulating both the duty ratio and frequency of the switching control signal that controls the CCFL driving circuit. External components for control loop compensation and frequency sweeping rate, and/or striking frequency setting may also be utilized.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: February 5, 2013
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Naixing Kuang, Lei Du, Yuancheng Ren
  • Publication number: 20120287790
    Abstract: A method including determining traffic adjustment information for traffic from a base station to a relay node in dependence on a quantity of data intended for each user equipment at a first quality of service level on a first radio bearer; and causing said traffic adjustment information to be sent to a network element.
    Type: Application
    Filed: January 11, 2010
    Publication date: November 15, 2012
    Inventors: Min Huang, Wei Hua Zhou, Zhu Yan Zhao, Lei Du