Patents by Inventor Hau Tran

Hau 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: 11770766
    Abstract: Systems and methods are provided for managing the power of a secondary node in an E-Utran/New Radio Dual Connectivity (ENDC) configured wireless communication network. In response to determining that one or more transmission blocking conditions have been met, a master node communicates an instruction to the secondary node via a data connection cable or an X2 logical interface to not transmit downlink signals, reducing overall power network power consumption and inter-nodal inference when ENDC resources are not required.
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: September 26, 2023
    Assignee: T-MOBILE INNOVATIONS LLC
    Inventors: Sanghoon Sung, Tri Duong, Hau Tran, Minho Song
  • Publication number: 20220417848
    Abstract: Systems and methods are provided for managing the power of a secondary node in an E-Utran/New Radio Dual Connectivity (ENDC) configured wireless communication network. In response to determining that one or more transmission blocking conditions have been met, a master node communicates an instruction to the secondary node via a data connection cable or an X2 logical interface to not transmit downlink signals, reducing overall power network power consumption and inter-nodal inference when ENDC resources are not required.
    Type: Application
    Filed: September 6, 2022
    Publication date: December 29, 2022
    Inventors: Sanghoon SUNG, Tri DUONG, Hau TRAN, Minho SONG
  • Patent number: 11463950
    Abstract: Systems and methods are provided for managing the power of a secondary node in an E-Utran/New Radio Dual Connectivity (ENDC)—configured wireless communication network. In response to determining that one or more transmission blocking conditions have been met, a master node communicates an instruction to the secondary node via a data connection cable or an X2 logical interface to not transmit downlink signals, reducing overall power network power consumption and inter-nodal inference when ENDC resources are not required.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: October 4, 2022
    Assignee: T-Mobile Innovations LLC
    Inventors: Sanghoon Sung, Tri Duong, Hau Tran, Minho Song
  • Patent number: 10798660
    Abstract: Device-to-device (D2D) transmissions by a wireless device may interfere with base station reception of other signals. To mitigate this interference, the wireless device estimates the path loss between itself and the base station. The path loss and the current D2D transmission power level are used to estimate the amount of interference the base station is experiencing as a result of the D2D transmissions from the wireless device. Based on the estimated interference experienced by the base station, the wireless device increases the robustness of the MCS being used and decreases the transmission power level by a corresponding amount. By decreasing the D2D transmission power level, less interference will be experienced by the base station. By increasing the robustness of the MCS, the impact of the reduced D2D transmission power level is mitigated.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: October 6, 2020
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Yun Sung Kim
  • Patent number: 10791487
    Abstract: A method for controlling handover of a user equipment device (UE) between (i) a first cell site that provides dual-connectivity service on a first radio access technology (RAT) and a second RAT and (ii) a second cell site that provides standalone first-RAT service, wherein the handover includes transitioning the UE from source first-RAT service to target first-RAT service. The method includes setting a handover threshold to use as a basis to evaluate whether target first-RAT coverage detected by the UE is sufficiently stronger than source first-RAT coverage detected by the UE, where setting the handover threshold includes setting the handover threshold to a value selected based on whether the UE has detected that second-RAT coverage of the first cell site meets a defined threshold measurement threshold. Further, the method includes applying the set handover threshold as a basis to control whether to invoke the handover of the UE.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: September 29, 2020
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Sandeep Mangrulkar
  • Patent number: 10548056
    Abstract: A method for controlling handover of a user equipment device (UE) between (i) a first cell site that provides dual-connectivity service on a first radio access technology (RAT) and a second RAT and (ii) a second cell site that provides standalone first-RAT service, wherein the handover includes transitioning the UE from source first-RAT service to target first-RAT service. The method includes setting a handover threshold to use as a basis to evaluate whether target first-RAT coverage detected by the UE is sufficiently stronger than source first-RAT coverage detected by the UE, where setting the handover threshold includes setting the handover threshold to a value selected based on whether the UE has detected that second-RAT coverage of the first cell site meets a defined threshold measurement threshold. Further, the method includes applying the set handover threshold as a basis to control whether to invoke the handover of the UE.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: January 28, 2020
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Sandeep Mangrulkar
  • Patent number: 10512037
    Abstract: In an wireless communication system, base stations will be set to prioritize serving one type of user equipment device (UE) over another type of UE, and each base station's respective prioritization will be conveyed to UEs to facilitate base station selection. That way, when a UE faces a choice of whether to connect with one base station or another, the UE could determine which base station gives higher priority to the UE's type and could connect with that base station, even if the UE detects stronger coverage of the other base station. And if the UE finds itself in coverage of a base station that gives lower priority to the UE's type than to another UE type, the UE could still connect with that base station unless the UE finds another base station that gives higher priority to the UE's type.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: December 17, 2019
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Yun Sung Kim, Minho Song, Hau Tran
  • Patent number: 9997875
    Abstract: A connector includes separate portions that rotatably couple together and form a connector. The portions include elements for defining cavities and or slots therebetween that accept one or more shear elements, such as shear pins for the purposes of coupling the separate portions together in forming a unitary connector. The connector might be used between a cable and another connector or could form part of the connector on a cable. The shear element is configured for engaging the various portions and spanning across the interface for joining the portions together. The shear element is configured for breaking when a sufficient torque force is applied between the connector portions.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: June 12, 2018
    Inventors: Christopher Roe, Hau Tran
  • Patent number: 9844077
    Abstract: A method of operating a communication system includes communicating data between an access node and a wireless device using carrier aggregation. This carrier aggregation includes communicating using at least a primary carrier and a secondary carrier. The communication system determines that conditions for the secondary carrier meet a beamforming requirement criteria. The communication system determines an angle of arrival of the primary carrier. Based on the angle of arrival determined for the primary carrier, beamforming is applied to the secondary carrier.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: December 12, 2017
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Tri Duong
  • Patent number: 9838978
    Abstract: Device-to-device (D2D) transmissions by a wireless device may interfere with base station reception of other signals. To mitigate this interference, the wireless device estimates the path loss between itself and the base station. The path loss and the current D2D transmission power level are used to estimate the amount of interference the base station is experiencing as a result of the D2D transmissions from the wireless device. Based on the estimated interference experienced by the base station, the wireless device increases the robustness of the MCS being used and decreases the transmission power level by a corresponding amount. By decreasing the D2D transmission power level, less interference will be experienced by the base station. By increasing the robustness of the MCS, the impact of the reduced D2D transmission power level is mitigated.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: December 5, 2017
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Yun Sung Kim
  • Publication number: 20170271825
    Abstract: A connector includes separate portions that rotatably couple together and form a connector. The portions include elements for defining cavities and or slots therebetween that accept one or more shear elements, such as shear pins for the purposes of coupling the separate portions together in forming a unitary connector. The connector might be used between a cable and another connector or could form part of the connector on a cable. The shear element is configured for engaging the various portions and spanning across the interface for joining the portions together. The shear element is configured for breaking when a sufficient torque force is applied between the connector portions.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 21, 2017
    Applicant: Carlisle Interconnect Technologies, Inc.
    Inventors: Christopher Roe, Hau Tran
  • Patent number: 9191858
    Abstract: A system information message is received by a wireless device. The system information message was broadcast from a first access node using a first frequency band. Cell loading information is extracted from the system information message. Based on the cell loading information, it is determined whether to connect the wireless device to the first access node using the first frequency band, or to a second access node using a second frequency band. The second access node is also broadcasting system information messages that include cell loading information.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: November 17, 2015
    Assignee: Sprint Spectrum L.P.
    Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Munawar Uddin
  • Patent number: 8579659
    Abstract: A push-on connector system includes a male push-on bore including a center conductor pin, and a female push-on core including a socket. The male push-on bore receives the female push-on core. A second bore is configured forwardly of the male push-on bore, and a latch track is positioned in the second bore and forms a plurality of inclined latch surfaces. A movable collar is mounted rearwardly of the female push-on core with a plurality of bayonet pins as is configured for engaging the second bore. The bayonet pins slide along the inclined latch surfaces to axially drive the movable collar into the second bore and secure the female push-on core into the male push-on bore. A resilient member is coupled between the movable collar and female push-on core to bias the female push-on core into the male push-on bore.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: November 12, 2013
    Assignee: Carlisle Interconnect Technologies, Inc.
    Inventors: Hau Tran, Mohsin Peeran, Phil Vaccaro
  • Publication number: 20130244467
    Abstract: A push-on connector system includes a male push-on bore including a center conductor pin, and a female push-on core including a socket. The male push-on bore receives the female push-on core. A second bore is configured forwardly of the male push-on bore, and a latch track is positioned in the second bore and forms a plurality of inclined latch surfaces. A movable collar is mounted rearwardly of the female push-on core with a plurality of bayonet pins as is configured for engaging the second bore. The bayonet pins slide along the inclined latch surfaces to axially drive the movable collar into the second bore and secure the female push-on core into the male push-on bore. A resilient member is coupled between the movable collar and female push-on core to bias the female push-on core into the male push-on bore.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 19, 2013
    Inventors: Hau Tran, Mohsin Peeran, Phil Vaccaro
  • Publication number: 20080065961
    Abstract: LDPC (Low Density Parity Check) coded modulation symbol decoding. Symbol decoding is supported by appropriately modifying an LDPC tripartite graph to eliminate the bit nodes thereby generating an LDPC bipartite graph (such that symbol nodes are appropriately mapped directly to check nodes thereby obviating the bit nodes). The edges that communicatively couple the symbol nodes to the check nodes are labeled appropriately to support symbol decoding of the LDPC coded modulation signal. The iterative decoding processing may involve updating the check nodes as well as estimating the symbol sequence and updating the symbol nodes. In some embodiments, an alternative hybrid decoding approach may be performed such that a combination of bit level and symbol level decoding is performed. This LDPC symbol decoding out-performs bit decoding only. In addition, it provides comparable or better performance of bit decoding involving iterative updating of the associated metrics.
    Type: Application
    Filed: October 5, 2006
    Publication date: March 13, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
  • Publication number: 20080043878
    Abstract: A method for parallel concatenated (Turbo) encoding and decoding. Turbo encoders receive a sequence of input data tuples and encode them. The input sequence may correspond to a sequence of an original data source, or to an already coded data sequence such as provided by a Reed-Solomon encoder. A turbo encoder generally comprises two or more encoders separated by one or more interleavers. The input data tuples may be interleaved using a modulo scheme in which the interleaving is according to some method (such as block or random interleaving) with the added stipulation that the input tuples may be interleaved only to interleaved positions having the same modulo-N (where N is an integer) as they have in the input data sequence. If all the input tuples are encoded by all encoders then output tuples can be chosen sequentially from the encoders and no tuples will be missed.
    Type: Application
    Filed: March 26, 2007
    Publication date: February 21, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Kelly Cameron, Ba-Zhong Shen, Hau Tran, Christopher Jones, Thomas Hughes
  • Publication number: 20080005650
    Abstract: LDPC (Low Density Parity Check) coded modulation hybrid decoding. A novel approach is presented wherein a combination of bit decoding and symbol level decoding (e.g., hybrid decoding) is performed for LDPC coded signals. Check node updating and symbol node updating are successively and alternatively performed on bit edge messages for a predetermined number of decoding iterations or until a sufficient degree of precision is achieved. The symbol node updating of the bit edge messages involves using symbol metrics corresponding to the symbol being decoded as well as the bit edge messages most recently updated by check node updating. The check node updating of the bit edge messages involves using the bit edge messages most recently updated by symbol node updating. The symbol node updating also involves computing possible soft symbol estimates for the symbol during each decoding iteration.
    Type: Application
    Filed: February 1, 2007
    Publication date: January 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
  • Publication number: 20070260944
    Abstract: Decoding LDPC (Low Density Parity Check) code and graphs using multiplication (or addition in log-domain) on both sides of bipartite graph. A means for decoding LDPC coded signals is presented whereby edge messages may be updated using only multiplication (or log domain addition). By appropriate modification of the various calculations that need to be performed when updating edge messages, the calculations may be reduced to only performing product of terms functions. When implementing such functionality in hardware within a communication device that is operable to decode LDPC coded signals, this reduction in processing complexity greatly eases the actual hardware's complexity as well. A significant savings in processing resources, memory, memory management concerns, and other performance driving parameters may be made.
    Type: Application
    Filed: May 29, 2007
    Publication date: November 8, 2007
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Kelly Cameron, Ba-Zhong Shen, Hau Tran
  • Publication number: 20070162818
    Abstract: Bandwidth efficient coded modulation scheme based on MLC (Multi-Level Code) signals having multiple maps. The use of multiple maps is adapted to various types of coded signals including multi-level LDPC coded modulation signals and other MLC signals to provide for a significant performance gain in the continual effort trying to reach towards Shannon's limit. In the instance of LDPC coded signals, various level LDPC codewords are generated from individual corresponding LDPC encoders. These various level LDPC codewords are arranged into a number of sub-blocks. Encoded bits from multiple level LDPC codewords within each of the sub-blocks are arranged to form symbols that are mapped according to at least two modulations. Each modulation includes a constellation shape and a corresponding mapping. This use of multiple mappings provides for improved performance when compared to encoders that employ only a single mapping.
    Type: Application
    Filed: February 1, 2007
    Publication date: July 12, 2007
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
  • Publication number: 20070157061
    Abstract: Sub-matrix-based implementation of LDPC (Low Density Parity Check) decoder. A novel approach is presented by which an LDPC coded signal is decoded by processing 1 sub-matrix at a time. A low density parity check matrix corresponding to the LDPC code includes rows and columns of sub-matrices. For example, when performing bit node processing, 1 or more sub-matrices in a column are processed; when performing check node processing, 1 or more sub-matrices in a row are processed. If desired, when performing bit node processing, the sub-matrices in each column are successively processed together (e.g., all column 1 sub-matrices, all column 2 sub-matrices, etc.). Analogously, when performing check node processing, the sub-matrices in each row can be successively processed together (e.g., all row 1 sub-matrices, all row 2 sub-matrices in row 2, etc.).
    Type: Application
    Filed: February 23, 2006
    Publication date: July 5, 2007
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Tak Lee, Hau Tran, Ba-Zhong Shen, Kelly Cameron