Patents by Inventor Phat Hong Tran

Phat Hong Tran 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: 8897818
    Abstract: A method for reducing energy consumption of mobile devices using a phase-continuous early paging indicator (EPI) is provided. For each of at least one paging occasion either A) an EPI indicative that a page is present in the paging occasion is transmitted during an EPI occasion in advance of the paging occasion, the EPI comprising at least one phase-continuous tone for the EPI occasion, and a page is transmitted during the paging occasion, or B) an EPI indicative that a page is not present in the paging occasion is transmitted during an EPI occasion in advance of the paging occasion, the EPI comprising at least one phase-continuous tone for the EPI occasion. A mobile device is configured to monitor for an EPI that comprises at least one phase-continuous tone for an EPI occasion in advance of its paging occasion in order to determine if a page is potentially present.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: November 25, 2014
    Assignee: BlackBerry Limited
    Inventors: Jianfeng Weng, Mark Earnshaw, Xin Jin, Phat Hong Tran
  • Patent number: 8843792
    Abstract: A control channel may be used to transmit control information, such as Downlink Control Information (DCI), to a mobile device from a network component, such as a base station or a base node. The mobile device may use a blind decoding scheme to detect DCIs. A DCI may be falsely detected by the mobile device. According to some embodiments, data that has been decoded by a blind decoder, from buffer data for a candidate control channel, is re-encoded. The re-encoded data is compared to buffer data for the control channel. The decoded data is treated as control information dependent on the comparison of the re-encoded data with the buffer data. In some embodiments, comparing the re-encoded data to the buffer data includes generating a metric as a function of a degree of similarity between the re-encoded data and the buffer data. The metric may be compared to a threshold.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: September 23, 2014
    Assignee: BlackBerry Limited
    Inventors: Xing Qian, Yangwen Liang, Jonathan Otto Swoboda, Phat Hong Tran
  • Publication number: 20130205176
    Abstract: A control channel may be used to transmit control information, such as Downlink Control Information (DCI), to a mobile device from a network component, such as a base station or a base node. The mobile device may use a blind decoding scheme to detect DCIs. A DCI may be falsely detected by the mobile device. According to some embodiments, data that has been decoded by a blind decoder, from buffer data for a candidate control channel, is re-encoded. The re-encoded data is compared to buffer data for the control channel. The decoded data is treated as control information dependent on the comparison of the re-encoded data with the buffer data. In some embodiments, comparing the re-encoded data to the buffer data includes generating a metric as a function of a degree of similarity between the re-encoded data and the buffer data. The metric may be compared to a threshold.
    Type: Application
    Filed: June 15, 2012
    Publication date: August 8, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: XING QIAN, YANGWEN LIANG, JONATHAN OTTO SWOBODA, PHAT HONG TRAN
  • Patent number: 8452237
    Abstract: A method and apparatus for automatic frequency control in a receiver of a wireless device, the method determining a channel estimation for a received signal; calculating a signal to noise ratio for the channel estimation; applying a weighting factor determined based on the calculated signal to noise ratio for the channel estimation to the channel estimation to create a weighted channel estimation; and supplying the weighted channel estimation to a voltage controlled oscillator.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: May 28, 2013
    Assignee: Research In Motion Limited
    Inventors: Zahir Raza, Phat Hong Tran
  • Publication number: 20120163366
    Abstract: A wireless communications device having a fast-receive mode for measuring received signal strength indication (RSSI) enables the device to handle higher time division multiple access (TDMA) multislot classes without requiring that the device include either a second receiver or a receiver with a more advanced and expensive phase-locked loop (PLL) design. The time to complete an RSSI measurement is reduced by initiating the sampling of signal strength before the radio transceiver is fully stabilized in the downlink mode. By initiating sampling before PLL stabilization is complete, the overall time to complete an RSSI measurement is reduced sufficiently to enable scheduling of an RSSI measurement in each GSM frame.
    Type: Application
    Filed: March 1, 2012
    Publication date: June 28, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Phat Hong TRAN, Oleksiy KRAVETS
  • Publication number: 20120122495
    Abstract: A method for reducing energy consumption of mobile devices using a phase-continuous early paging indicator (EPI) is provided. For each of at least one paging occasion either A) an EPI indicative that a page is present in the paging occasion is transmitted during an EPI occasion in advance of the paging occasion, the EPI comprising at least one phase-continuous tone for the EPI occasion, and a page is transmitted during the paging occasion, or B) an EPI indicative that a page is not present in the paging occasion is transmitted during an EPI occasion in advance of the paging occasion, the EPI comprising at least one phase-continuous tone for the EPI occasion. A mobile device is configured to monitor for an EPI that comprises at least one phase-continuous tone for an EPI occasion in advance of its paging occasion in order to determine if a page is potentially present.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 17, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Jianfeng Weng, Mark Earnshaw, Xin Jin, Phat Hong Tran
  • Patent number: 8149813
    Abstract: A wireless communications device having a fast-receive mode for measuring received signal strength indication (RSSI) enables the device to handle higher time division multiple access (TDMA) multislot classes without requiring that the device include either a second receiver or a receiver with a more advanced and expensive phase-locked loop (PLL) design. The time to complete an RSSI measurement is reduced by initiating the sampling of signal strength before the radio transceiver is fully stabilized in the downlink mode. By initiating sampling before PLL stabilization is complete, the overall time to complete an RSSI measurement is reduced sufficiently to enable scheduling of an RSSI measurement in each GSM frame.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: April 3, 2012
    Assignee: Research In Motion Limited
    Inventors: Phat Hong Tran, Oleksiy Kravets
  • Patent number: 7856051
    Abstract: Apparatus, and an associated method, for determining whether to accept as valid a data segment, such as a radio block communicated pursuant to an EDGE communication session. A bit error rate measurer measures the bit error rate of a header part of a received radio block. The measured bit error rate is compared against a selected threshold. Results of the comparison are determinative of whether the radio block is accepted as valid or rejected as corrupted.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: December 21, 2010
    Assignee: Research In Motion Limited
    Inventors: Phat Hong Tran, Xing Qian
  • Publication number: 20100040040
    Abstract: A wireless communications device having a fast-receive mode for measuring received signal strength indication (RSSI) enables the device to handle higher time division multiple access (TDMA) multislot classes without requiring that the device include either a second receiver or a receiver with a more advanced and expensive phase-locked loop (PLL) design. The time to complete an RSSI measurement is reduced by initiating the sampling of signal strength before the radio transceiver is fully stabilized in the downlink mode. By initiating sampling before PLL stabilization is complete, the overall time to complete an RSSI measurement is reduced sufficiently to enable scheduling of an RSSI measurement in each GSM frame.
    Type: Application
    Filed: August 13, 2008
    Publication date: February 18, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Phat Hong TRAN, Oleksiy KRAVETS
  • Publication number: 20080171543
    Abstract: Apparatus, and an associated method, for determining whether to accept as valid a data segment, such as a radio block communicated pursuant to an EDGE communication session. A bit error rate measurer measures the bit error rate of a header part of a received radio block. The measured bit error rate is compared against a selected threshold. Results of the comparison are determinative of whether the radio block is accepted as valid or rejected as corrupted.
    Type: Application
    Filed: January 25, 2007
    Publication date: July 17, 2008
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: PHAT HONG TRAN, XING QIAN