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).
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Patent number: 11770766Abstract: 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: GrantFiled: September 6, 2022Date of Patent: September 26, 2023Assignee: T-MOBILE INNOVATIONS LLCInventors: Sanghoon Sung, Tri Duong, Hau Tran, Minho Song
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Publication number: 20220417848Abstract: 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: ApplicationFiled: September 6, 2022Publication date: December 29, 2022Inventors: Sanghoon SUNG, Tri DUONG, Hau TRAN, Minho SONG
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Patent number: 11463950Abstract: 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: GrantFiled: February 18, 2020Date of Patent: October 4, 2022Assignee: T-Mobile Innovations LLCInventors: Sanghoon Sung, Tri Duong, Hau Tran, Minho Song
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Patent number: 10798660Abstract: 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: GrantFiled: November 1, 2017Date of Patent: October 6, 2020Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Yun Sung Kim
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Patent number: 10791487Abstract: 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: GrantFiled: December 5, 2019Date of Patent: September 29, 2020Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Sandeep Mangrulkar
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Patent number: 10548056Abstract: 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: GrantFiled: February 8, 2019Date of Patent: January 28, 2020Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Sandeep Mangrulkar
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Patent number: 10512037Abstract: 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: GrantFiled: March 7, 2019Date of Patent: December 17, 2019Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Yun Sung Kim, Minho Song, Hau Tran
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Patent number: 9997875Abstract: 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: GrantFiled: March 15, 2016Date of Patent: June 12, 2018Inventors: Christopher Roe, Hau Tran
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Patent number: 9844077Abstract: 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: GrantFiled: March 19, 2015Date of Patent: December 12, 2017Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Tri Duong
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Patent number: 9838978Abstract: 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: GrantFiled: December 16, 2015Date of Patent: December 5, 2017Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Udit Thakore, Hau Tran, Yun Sung Kim
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Publication number: 20170271825Abstract: 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: ApplicationFiled: March 15, 2016Publication date: September 21, 2017Applicant: Carlisle Interconnect Technologies, Inc.Inventors: Christopher Roe, Hau Tran
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Patent number: 9191858Abstract: 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: GrantFiled: May 22, 2014Date of Patent: November 17, 2015Assignee: Sprint Spectrum L.P.Inventors: Sanghoon Sung, Yun Sung Kim, Hau Tran, Munawar Uddin
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Patent number: 8579659Abstract: 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: GrantFiled: March 13, 2012Date of Patent: November 12, 2013Assignee: Carlisle Interconnect Technologies, Inc.Inventors: Hau Tran, Mohsin Peeran, Phil Vaccaro
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Publication number: 20130244467Abstract: 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: ApplicationFiled: March 13, 2012Publication date: September 19, 2013Inventors: Hau Tran, Mohsin Peeran, Phil Vaccaro
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Publication number: 20080065961Abstract: 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: ApplicationFiled: October 5, 2006Publication date: March 13, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
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Publication number: 20080043878Abstract: 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: ApplicationFiled: March 26, 2007Publication date: February 21, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Kelly Cameron, Ba-Zhong Shen, Hau Tran, Christopher Jones, Thomas Hughes
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Publication number: 20080005650Abstract: 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: ApplicationFiled: February 1, 2007Publication date: January 3, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
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Publication number: 20070260944Abstract: 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: ApplicationFiled: May 29, 2007Publication date: November 8, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Kelly Cameron, Ba-Zhong Shen, Hau Tran
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Publication number: 20070162818Abstract: 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: ApplicationFiled: February 1, 2007Publication date: July 12, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Ba-Zhong Shen, Hau Tran, Kelly Cameron
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Publication number: 20070157061Abstract: 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: ApplicationFiled: February 23, 2006Publication date: July 5, 2007Applicant: Broadcom Corporation, a California CorporationInventors: Tak Lee, Hau Tran, Ba-Zhong Shen, Kelly Cameron