Patents by Inventor Guangming Shi

Guangming Shi 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).

  • METHOD AND APPARATUS FOR ENHANCEMENT OF SYNCHRONIZATION FOR TD-SCDMA BATON HANDOVER
    Publication number: 20120184278
    Abstract: A method and apparatus for wireless communication comprising switching an uplink (UL) from a source cell to a target cell; and receiving a Synchronization Shift (SS) command from the source cell, wherein the SS command is generated by the target cell. In one aspect, the method and apparatus further comprise switching a downlink (DL) through the target cell; completing a physical channel reconfiguration; and sending a Physical Channel Reconfiguration Complete message to the Radio Network Controller (RNC) through the target cell.
    Type: Application
    Filed: April 7, 2010
    Publication date: July 19, 2012
    Applicant: Qualcomm Incorporated
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Method and Apparatus for Recovery of Link Failure During Handover in TD-SCDMA Systems
    Publication number: 20120176891
    Abstract: A method and an apparatus for wireless communications comprising determining that a first handover from a source cell to a target cell has failed; and performing a second handover from the source cell to a first neighbor cell different from the source cell and from the target cell. In on aspect, the method and apparatus further comprising performing the second handover by sending a signal to the first neighbor cell and receiving a return signal from the first neighbor cell; and further comprising sending a message to initiate radio resource setup between the first neighbor cell and a radio network controller (RNC); and receiving a connection resetup and a Physical Channel Reconfiguration message from the radio network controller (RNC).
    Type: Application
    Filed: May 8, 2010
    Publication date: July 12, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-chun Lee
  • Method and Apparatus for Returning During a Baton Handover
    Publication number: 20120172043
    Abstract: An apparatus and method enable mobile user equipment to return to a first cell after attempting a baton handover to a second cell. In one aspect of the disclosure, a method of wireless communication in a cellular network including a source cell and a target cell is disclosed. Here, the method includes switching transmission of an uplink from the source cell to the target cell while maintaining a downlink with the source cell, determining to return the transmission of the uplink to the source cell, and returning the transmission of the uplink from the target cell to the source cell. In some aspects, the method may further include switching reception of a downlink from the source cell to the target cell, determining to return the reception of the downlink to the source cell, and returning the reception of the downlink from the target cell to the source cell.
    Type: Application
    Filed: March 31, 2010
    Publication date: July 5, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Method and Apparatus for System Frame Number Synchronization in Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) Networks
    Publication number: 20120170549
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a first signal from a first Node B (NB) using a first system frame number (SFN) is received; and a second signal from a second NB using a second SFN is received, wherein the first SFN and the second SFN are identical.
    Type: Application
    Filed: May 7, 2010
    Publication date: July 5, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Baton Handover From TDD-LTE to TD-SCDMA Systems
    Publication number: 20120163248
    Abstract: Certain aspects of the present disclosure propose techniques for performing a baton handover from TDD-LTE to TD-SCDMA systems. Certain aspects provide a method that generally includes receiving a handover command to handover from a base station (BS) of a first radio access technology (RAT) to a BS of a second RAT, switching uplink (UL) transmission from the BS of the first RAT to the BS of the second RAT, maintaining downlink (DL) transmission with the BS of the first RAT after switching the UL transmission to the BS of the second RAT, and switching the DL transmission from the BS of the first RAT to the BS of the second RAT after switching the UL transmission to the BS of the second RAT.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • System and Method of Improving Redirection in a TD-SCDMA Circuit-Switched Fallback from TDD-LTE Systems
    Publication number: 20120163249
    Abstract: Certain aspects of the present disclosure propose techniques for improving redirection in a TD-SCDMA circuit-switched fallback from TDD-LTE systems. Certain aspects provide a method that generally includes initiating a call setup (CS) procedure for leaving a base station (BS) of a first radio access technology (RAT) for a call on a second RAT, receiving, in response to the CS procedure, a message from the BS of the first RAT comprising a system frame number (SFN) for the BS of the first RAT and an offset number for a BS of the second RAT for setting up the call, and generating an estimated SFN for the BS of the second RAT based on the SFN for the BS of the first RAT and the offset number.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • System Synchronization in TD-SCDMA and TDD-LTE Systems
    Publication number: 20120163250
    Abstract: Certain aspects of the present disclosure propose techniques for synchronizing TD-SCDMA and TDD-LTE systems. Certain aspects provide a method that generally includes obtaining, from a base station (BS) of a first radio access technology (RAT), timing and a system frame number (SFN) for a BS of a second RAT, and performing network acquisition operations with the BS of the second RAT using the timing and the SFN.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • METHOD AND APPARATUS FOR MAINTAINING COMMUNICATION DURING A BATON HANDOVER
    Publication number: 20120163340
    Abstract: A method and apparatus enable high-speed downlink data transmissions to continue while a baton handover is in progress. In an aspect of the disclosure, a method of wireless communication includes switching an uplink from a source cell to a target cell while maintaining a downlink with the source cell, and transmitting over the uplink to the target cell at least one metric of quality of the downlink In one example, the metric of quality may be a CQI. In another example, the metric of quality may be a HARQ ACK/NACK. The metric of quality of the downlink may be transmitted from the target cell to the source cell, directly or by way of a radio network controller.
    Type: Application
    Filed: March 31, 2010
    Publication date: June 28, 2012
    Applicant: Qualcomm Incorporated
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Scheduling TDD-LTE Measurement in TD-SCDMA Systems
    Publication number: 20120163198
    Abstract: Certain aspects of the present disclosure propose techniques for performing a time division duplex-long term evolution (TDD-LTE) measurement in a time division synchronous code division multiple access (TD-SCDMA) system. Certain aspects provide a method that generally includes obtaining measurements of downlink (DL) transmission from a base station (BS) of a second radio access technology (RAT), maintaining uplink (UL) transmission with a BS of a first RAT while obtaining the measurements, and performing network acquisition operations with the BS of the second RAT based on the measurements.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • TDD-LTE Measurement Gap for Performing TD-SCDMA Measurement
    Publication number: 20120163346
    Abstract: Certain aspects of the present disclosure propose techniques for enhancing a measurement gap for TD-SCDMA measurement. Certain aspects provide a method that generally includes receiving, from a base station (BS) of a first radio access technology (RAT), a message indicating a measurement gap in which a user equipment (UE) is to take a measurement in a second RAT, the message comprising an indication of a start position of the measurement gap and a duration of the measurement gap; and taking a measurement during the measurement gap.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Virtual SIM card for mobile handsets
    Patent number: 8200736
    Abstract: A system and method for providing a capability to backup cellular telephone provisioning information and personal data from a mobile handset on a server. A user initializes an account with a service provider with authentication credentials and backs up provisioning information and personal data stored within a mobile handset to server for safe keeping. The provisioning information and personal data can be accessed via the cellular telephone network so that the provisioning and personal data can be transferred among mobile handsets. This allows a user to restore personal data quickly and easily if a mobile handset replaced, lost or destroyed. The system and method further provide the capability to remotely provision new mobile handsets.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: June 12, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Guangming Shi, Venkat Tangirala, Julian Durand, Ajay Dudani
  • SELECTING NETWORK SERVICE PROVIDERS FOR MULTI-MODE MOBILE DEVICES
    Publication number: 20120122514
    Abstract: A method for facilitating dynamic service-based network selection and determination may be implemented by a communications device. A device may choose a network and/or network access provider (NAP) based on a type of service desired by a user. For the service, the system may determine which NAP provides the most desired service level for a particular network service provider (NSP). The desired service level may include such factors as power consumption, communication performance, past performance, cost, reward availability, etc. Thus, a user chooses a particular service and the system chooses the network that will provide the service at a desired level to the user.
    Type: Application
    Filed: January 17, 2012
    Publication date: May 17, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Steven D. Cheng, Tom Chin, Guangming Shi, Kuo-Chin Lee
  • Method and Apparatus to Support HSUPA During Baton Handover in TD-SCDMA Systems
    Publication number: 20120113960
    Abstract: Certain aspects of the present disclosure propose techniques for continuing high-speed packet access (HSPA) during the baton handover in Target Cell Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems. In an aspect of the disclosure, a technique for performing a baton handover from a source node B (NB) to a target NB by a user equipment (UE) is provided. The technique generally includes receiving a first signal instructing the UE to perform the baton handover from the source NB to the target NB, transmitting data in uplink transmissions to the target NB during the baton handover, and receiving, from the source NB, information regarding the uplink transmissions.
    Type: Application
    Filed: May 8, 2010
    Publication date: May 10, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • USING QUALITY OF SERVICE TO CONTROL HARDWARE FOR LOW BATTERY SCENARIOS
    Publication number: 20120108224
    Abstract: Certain embodiments of the present disclosure relate to methods for reducing power consumption of a mobile device while maintaining QoS of communication links. If the available battery power is below a predefined threshold, then several power-saving techniques may be triggered that increase an air time of the mobile device by shutting down one or more modem hardware components.
    Type: Application
    Filed: October 5, 2011
    Publication date: May 3, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Steven D. Cheng, Guangming Shi, Tom Chin
  • METHOD AND APPARATUS FOR TRANSMISSION FAILURE DETECTION IN TIME DIVISION SYNCHRONOUS CODE DIVISION MULTIPLE ACCESS (TD-SCDMA) NETWORKS
    Publication number: 20120099535
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided, wherein a first synchronization signal is transmitted to request access to a Node B; an acknowledgement transmitted from the Node B is detected, wherein the acknowledgment comprises an indication that a second synchronization signal was transmitted after the first synchronization signal; and the first synchronization signal is retransmitted based on the acknowledgment.
    Type: Application
    Filed: March 26, 2010
    Publication date: April 26, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • METHOD AND APPARATUS FOR EFFICIENT IDLE OPERATION IN A DUAL-SIM WCDMA MOBILE STATION
    Publication number: 20120088502
    Abstract: Methods and apparatus are provided for selecting identifying numbers associated with a mobile station (MS) having multiple subscriber identity modules (SIMs) such that the paging intervals for both identifying numbers are aligned. The MS having multiple SIMs may operate in a network via a particular radio access technology (RAT), such as Wideband Code Division Multiple Access (W-CDMA). By having aligned paging intervals, the MS may wake up only once during the paging cycles for the various identifying numbers rather than waking up multiple times, thereby reducing power consumption of the MS during idle mode compared to a conventional MS with multiple SIMs, and thus multiple identifying numbers.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 12, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • TD-SCDMA MEASUREMENT IN A DUAL TD-SCDMA AND GSM MOBILE STATION
    Publication number: 20120088499
    Abstract: Certain aspects of the present disclosure provide techniques and apparatus for performing cell reselection based on neighbor cell measurements. For certain aspects, a method of wireless communication generally includes, while actively served in a first Radio Access Technology (RAT) network, obtaining neighbor cell measurements for a second RAT network, and making a decision on whether to perform a cell reselection to the second RAT network based on the neighbor cell measurements.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 12, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • METHOD AND APPARATUS FOR EFFICIENT IDLE OPERATION IN A DUAL-SIM CDMA 1X MOBILE STATION
    Publication number: 20120088501
    Abstract: Methods and apparatus are provided for selecting identifying numbers associated with a mobile station (MS) having multiple subscriber identity modules (SIMs) such that the paging intervals for both identifying numbers are aligned. The MS having multiple SIMs may operate in a network via a particular radio access technology (RAT), such as Code Division Multiple Access (CDMA) 1×RTT (1 times Radio Transmission Technology). By having aligned paging intervals, the MS may wake up only once during the paging cycles for the various identifying numbers rather than waking up multiple times, thereby reducing power consumption of the MS during idle mode compared to a conventional MS with multiple SIMs, and thus multiple identifying numbers.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 12, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Network Selection for User Equipment With Multiple Universal Subscriber Identity Modules
    Publication number: 20120052911
    Abstract: Wireless communication in a radio access network may be implemented in a manner where a user equipment (UE) with multiple Universal Subscriber Identity Modules (USIMs) selects a system based on the system's preference status among the USIMs of the UE. A system that is home to all the UE's USIMs is selected over one that is home to some USIMs but roaming for others. A system that is home to some USIMs but not provisioned for other USIMs is selected over one that is roaming to all USIMs. A system that is roaming to all USIMs is selected over one that is roaming to some USIMs but not provisioned for other USIMs. Ranking of systems may be done independently by USIM or may be done using a combined ranking method that considers other USIMs prior to an individual USIM indicating a system priority. Manual system selection may also be used.
    Type: Application
    Filed: December 9, 2010
    Publication date: March 1, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
  • Uplink Synchronization of TD-SCDMA Multiple USIM Mobile Terminal During Handover
    Publication number: 20120040672
    Abstract: Certain aspects of the present disclosure provide techniques and apparatus for uplink synchronization of a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) multiple Universal Subscriber Identity Module (USIM) mobile terminal during a handover. For certain aspects, a method of wireless communication generally includes transmitting, to a Node B, at least one uplink synchronization code from a UE comprising at least a first subscriber identity and a second subscriber identity, receiving timing information for uplink synchronization to the Node B, wherein the timing information is measured based on the at least one uplink synchronization code, and applying the timing information to calls for both of the first and second subscriber identities to synchronize uplink transmissions to the Node B.
    Type: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Inventors: Tom Chin, Guangming Shi, Kuo-Chun Lee