Patents by Inventor Wen Zhao

Wen Zhao 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: 7599687
    Abstract: A test apparatus for conducting a radiated performance test on a wireless device under controlled test conditions, the test apparatus having an anechoic chamber; a test computer; and an interface, the interface adapted to connect the test computer to the wireless device, the test apparatus being adapted to: establish a data connection on the interface between the test computer and the wireless device; initialize and start a timer for a predetermined interval on the wireless device; subject the wireless device to the radiated performance test in the anechoic chamber after the predetermined interval; and analyze test results on the test computer from a test log stored on the wireless device during the radiated performance test, wherein the interface between the test computer and the wireless device is adapted to be removed during the predetermined interval; for conducting a radiated performance test on a wireless device.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: October 6, 2009
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Xin Jin, C. Nicolas Bugnariu, Muhammad Khaledul Islam, Fangyi Luo, Jiansheng Chen
  • Publication number: 20090239487
    Abstract: A method and apparatus for regulating Tx power in a multi-rate mobile device transmitter containing signal dependent gain stages. A data rate and signal format indicator signal corresponding to the transmitted signal, and a desired reference power signal are fed to a mapper that outputs a calibration value based on the desired reference power level at the antenna. The calibration value controls the power amplifier gain characteristics in real time.
    Type: Application
    Filed: June 3, 2009
    Publication date: September 24, 2009
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Xin Jin, Nagula T. Sangary, M. Khaledul Islam, Wen Zhao, Nasserullah Khan, Wen-Yen Chan, Qing Zhong Jiao
  • Patent number: 7593727
    Abstract: A method and apparatus for best service rescan scheduling on a mobile device operating in an EVDO hybrid mode, the method comprising the steps of: blocking a best service rescan on the mobile device if the mobile device in an EVDO traffic state, the mobile device characterized by blocking means, the blocking means enabled to block a best service rescan on the mobile device if the mobile device in an EVDO traffic state.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: September 22, 2009
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Asif Hossain, Shahid Chaudry
  • Publication number: 20090232055
    Abstract: An apparatus and method of controlling unsolicited traffic are disclosed herein. The apparatus and method can be applied to wireless communication networks such as CDMA2000, UMTS, GPRS and the like so that traffic which is not solicited by wireless communication devices operating on those networks is not sent over the air needlessly. The present application provides techniques to block unsolicited traffic based on the identity of a user (for example based on International Mobile Station Identity (IMSI), Network Access Identifier (NAI), Mobile Station Internet Services Digital Network Number (MSISDN), Session Initiation Protocol (SIP) Universal Resource Locator (url)) as opposed to techniques that are based on a session or IP address, such as a traditional firewall. In accordance to this application, user identity based techniques are applied to block unsolicited traffic whenever a user has established a data session.
    Type: Application
    Filed: May 22, 2009
    Publication date: September 17, 2009
    Inventors: Wen Zhao, Thomas Leonard Trevor Plestid, Craig Dunk, Muhammad Khaledul Islam, Luis Pablo Estable, William Daniel Willey
  • Patent number: 7570976
    Abstract: Methods and apparatus for expeditiously releasing network resources for a mobile station based on low battery and lost signal conditions are disclosed. The wireless network (104) receives a power down warning message from the mobile station (102) indicative of a low battery condition. The wireless network (104) then identifies whether a lost signal condition exists with the mobile station (102). In response to receiving the power down warning message and subsequently identifying the lost signal condition, the wireless network (104) causes network resources for the mobile station to be released. The wireless network (104) infers that the mobile station (102) has powered down due to low battery without enough time to send a power down registration to the wireless network (104).
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 4, 2009
    Assignee: Research In Motion Limited
    Inventors: Xin Jin, Muhammad Khaledul Islam, Wen Zhao
  • Patent number: 7570966
    Abstract: In instant communications over a wireless network, a user from a private organization sends the request for instant communications communication through a private server controlled by the private organization. The private server sets up a private account with the wireless carrier and the user communicates via the private account.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: August 4, 2009
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Xin Jin
  • Patent number: 7558540
    Abstract: A method and apparatus for regulating Tx power in a multi-rate mobile device transmitter containing signal dependent gain stages. A data rate and signal format indicator signal corresponding to the transmitted signal, and a desired reference power signal are fed to a mapper that outputs a calibration value based on the desired reference power level at the antenna. The calibration value controls the power amplifier gain characteristics in real time.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: July 7, 2009
    Assignee: Research In Motion Limited
    Inventors: Xin Jin, Nagula T. Sangary, M. Khaledul Islam, Wen Zhao, Nasserullah Khan, Wen-Yen Chan, Qing Zhong Jiao
  • Patent number: 7545767
    Abstract: An apparatus and method of controlling unsolicited traffic are disclosed herein. The apparatus and method can be applied to wireless communication networks such as CDMA2000, UMTS, GPRS and the like so that traffic which is not solicited by wireless communication devices operating on those networks is not sent over the air needlessly. The present application provides techniques to block unsolicited traffic based on the identity of a user (for example based on International Mobile Station Identity (IMSI), Network Access Identifier (NAI), Mobile Station Internet Services Digital Network Number (MSISDN), Session Initiation Protocol (SIP) Universal Resource Locator (url)) as opposed to techniques that are based on a session or IP address, such as a traditional firewall. In accordance to this application, user identity based techniques are applied to block unsolicited traffic whenever a user has established a data session.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 9, 2009
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Thomas Leonard Trevor Plestio, Craig Dunk, Muhammad Khaledul Islam, Luis Pablo Estable, William Daniel Willey
  • Publication number: 20090140937
    Abstract: An antenna unit is used in a desktop computer (100) having a metal shell (1). The antenna unit includes a slot (110) defining on the metal shell, a coaxial cable (3) having an inner conductor (32) connected to a first side (111) of the slot and an outer braiding (33) connected to a second side (112) of the slot, and a fastening member (34) extending across the coaxial cable and securing the coaxial cable on the metal shell.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 4, 2009
    Inventors: John Chow, Li-Chun Wu, Der-Chung Hwang, Yun-Cheng Hou, Wen-Zhao Huang
  • Publication number: 20090109871
    Abstract: Techniques for configuring wireless communications devices are disclosed. For instance, an apparatus may include a storage medium to store one or more configuration files, and a configuration module. Each of the one or more configuration files may correspond to a network carrier. The configuration module selects one of the configuration files and to extract one or more operational parameters from it. This selected configuration file and the one or more operational parameters correspond to a designated network carrier.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Alex Ho, Isabel Mahe, Wen Zhao, Edmond Leung, Gurunath Ramaswamy, Richard Curtis Scott
  • Publication number: 20090092102
    Abstract: A method and apparatus for user data traffic handling for an EVDO enabled hybrid mode mobile device, the method having the steps of: blocking a system selection at the mobile device until no EVDO traffic state exists, the blocking step includes either monitoring whether a user changes a scan mode on the mobile device; and if the user changes the scan mode, checking whether the mobile device is in an EVDO traffic state; and if yes delaying a system selection until the EVDO traffic state is ended, or monitoring whether a user is in an EVDO traffic state, and if yes, preventing a user from accessing a scan mode menu on the mobile device.
    Type: Application
    Filed: October 20, 2008
    Publication date: April 9, 2009
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Asif HOSSAIN, Hao XUE, Shahid CHAUDRY, Wen ZHAO
  • Publication number: 20090088162
    Abstract: Provided is a method and system for supporting IMS VCC based on an MIH. In a method of supporting a multimedia service for an MIH-based VCC, neighbor network information is obtained from an MIH server periodically or according to an event trigger and scanning the neighbor network. The capacity of at least one more candidate networks is detected from the scanning results to prepare a handover. A target network is determined among the candidate networks to reserve resources and a handover command event is generated to perform a domain transfer. The handover is completed after the performing of the domain transfer.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Zheng Wen Zhao, Jeong-Jae Won, Young-Seok Kim, Eui-Seok Hwang, Peng Lei
  • Publication number: 20090059826
    Abstract: Techniques for managing power consumption are disclosed. For instance, an apparatus may include a first network interface module, a second network interface module, and a power management module. The first network interface module may communicate with wireless networks of a first network type, and the second network interface module may communicate with wireless networks of a second network type. Examples of first and second network types are EVDO and CDMA2000, respectively. The power management module may suspend one or more operations of the first network interface module when a number of first network type outages exceeds a predetermined outage threshold within a predetermined time interval.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: Wen Zhao, Isabel Mahe
  • Publication number: 20090040118
    Abstract: An electronic device (100) includes a metal shell (1) having a number of walls (11,12) and an antenna unit (3). The metal wall has an interior space (17) defined therebetween, at least one recess (110) defined on one of the wall (11), and a mating member (111) disposed around the recess and extending into the interior space. The antenna unit is received in the recess and has a locating portion (36) extending from a side portion thereof and pivotably engaging with the mating member. When the antenna unit is rotated from a closed position to an opening position, another side portion of the antenna unit extends outward from the recess.
    Type: Application
    Filed: August 11, 2008
    Publication date: February 12, 2009
    Inventors: John Chow, Li-chun Wu, Der-Chung Hwang, Yun-Cheng Hou, Fang-Chi Huang, Wen-Zhao Huang
  • Publication number: 20090007006
    Abstract: Techniques for scrolling through displayed information are disclosed. For instance, an apparatus includes a scrolling management module to set one or more automatic scrolling preferences, and an application to output a content item in accordance with the one or more automatic scrolling preferences. Examples of such scrolling preferences include scrolling speeds, designated input mechanism(s) to adjust scrolling, and the activation/deactivation of orientation-based scrolling.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: PALM, INC.
    Inventors: Tong Liu, Wen Zhao, Janell L. Paulson, Isabel Mahe
  • Patent number: 7454208
    Abstract: A method and apparatus for user data traffic handling for an EVDO enabled hybrid mode mobile device, the method having the steps of: blocking a system selection at the mobile device until no EVDO traffic state exists, the blocking step includes either monitoring whether a user changes a scan mode on the mobile device; and if the user changes the scan mode, checking whether the mobile device is in an EVDO traffic state; and if yes delaying a system selection until the EVDO traffic state is ended, or monitoring whether a user is in an EVDO traffic state, and if yes, preventing a user from accessing a scan mode menu on the mobile device.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: November 18, 2008
    Assignee: Research In Motion Limited
    Inventors: Asif Hossain, Hao Xue, Shahid Chaudry, Wen Zhao
  • Publication number: 20080214117
    Abstract: A test apparatus for conducting a radiated performance test on a wireless device under controlled test conditions, the test apparatus having an anechoic chamber; a test computer; and an interface, the interface adapted to connect the test computer to the wireless device, the test apparatus being adapted to: establish a data connection on the interface between the test computer and the wireless device; initialize and start a timer for a predetermined interval on the wireless device; subject the wireless device to the radiated performance test in the anechoic chamber after the predetermined interval; and analyze test results on the test computer from a test log stored on the wireless device during the radiated performance test, wherein the interface between the test computer and the wireless device is adapted to be removed during the predetermined interval; for conducting a radiated performance test on a wireless device
    Type: Application
    Filed: March 7, 2008
    Publication date: September 4, 2008
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Wen ZHAO, Xin JIN, C. Nicolas BUGNARIU, Muhammad Khaledul ISLAM, Fangyi LUO, Jiansheng CHEN
  • Publication number: 20080153500
    Abstract: A method and system of reachability indication between a wireless device and at least one push server, the method comprising the steps of: sending device status information from the wireless device to the at least one push server; and receiving the status information at the at least one push server; wherein the at least one push server is enabled to selectively start and stop serving the wireless device on the basis of the status information. The method further comprises sending status information to a packet data serving node that stores a list of push servers associated with a wireless device, and having the packet data serving node forward the status information to the push server. The system and method further includes selectively starting and stopping the serving of the wireless device by the push server during a voice call.
    Type: Application
    Filed: March 12, 2008
    Publication date: June 26, 2008
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Wen ZHAO, Xin JIN, Muhammad Khaledul ISLAM, Haining ZHANG
  • Publication number: 20080143694
    Abstract: Techniques involving the management of display parameters are disclosed. For example, an apparatus may include a display, a radio module, and a control module. The display employs various operational parameters, which can take on different values. Exemplary parameters include refresh rate and/or pixel clock rate. The radio module may receive a wireless signal at one or more reception frequencies. The control module may select values for these operational parameters of the display. This selection may be made according to characteristics of interference that would be emitted from the display at the one or more reception frequencies. Upon making this selection, the control module may direct the display to employ the selected parameter values.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 19, 2008
    Inventors: Jerome C. Tu, Olivier Boireau, Isabel Mahe, Wen Zhao, Yury Fomin, Jianxiong Shi, Alexander Fertelmeister
  • Publication number: 20080139130
    Abstract: Systems and methods are provided for a cellular network to receive and decode access probes. A wireless device transmits an access probe spread with a PN code to a cellular network. The transceiver to which the wireless device is associated with can receive and decode the access probe. Additionally, other transceivers can receive and decode the access probe. In some implementations, each transceiver listens for access probes spread with their respective transceiver-specific PN code or other PN codes associated with neighbouring transceivers. In other implementations, each transceiver listens for access probes spread with a common access code. There may be more than one common access code in which each transceiver listens for access probes spread with any one of the common access codes.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 12, 2008
    Inventors: Wen Zhao, Xin Jin