Patents by Inventor Shiang-Jiun Lin

Shiang-Jiun Lin 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: 10405355
    Abstract: Methods and apparatus are provided for Msg3 collision resolutions. In one embodiment, the UE obtains a set of DMRS seeds and randomly selecting one to generate a DMRS sequence for the Msg3. The set of DMRS seeds is either generated based on a received cell-specific parameter or are received from the network. In another embodiment, the eNB, upon detecting the collision in Msg3, indicates a lowered MCS level for the Msg3 transmission in the RAR after the preamble detection. In another embodiment, the early termination of Msg3 transmission is used upon determining the collision of Msg3. In one embodiment, the eNB responds an ACK to a failed Msg3 to suspend the re-transmission of the Msg3. In another embodiment, the eNB sends a flag to cancel the mac-ContentionResolutionTimer and terminate the Msg3 transmission. The termination indication is either embedded in the acknowledgement signaling or sent through PDCCH signaling.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: September 3, 2019
    Assignee: HFI Innovation INC.
    Inventors: Shiang-Jiun Lin, Pei-Kai Liao, Chien-Hwa Hwang
  • Publication number: 20190223221
    Abstract: A method of high reliability and early data transmission (EDT) is proposed. EDT allows one uplink transmission (optionally) followed by one downlink data transmission during a random-access channel (RACH) procedure, which can reduce the signaling overhead and save UE power. To improve reliability, for uplink EDT, there would be different set of RACH reattempt parameters in the UE for different types of access. For downlink EDT, there would be an indication in the paging message to trigger whether the UE would use legacy RACH or not. Further, the configuration for PRACH resource for EDT can be independent to legacy PRACH resource configuration. Under certain conditions, UE can fallback to legacy RACH procedure for high reliability.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 18, 2019
    Inventors: Per Johan Mikael Johansson, Shiang Jiun Lin, Li-Chuan Tseng, Gilles Charbit
  • Publication number: 20190159260
    Abstract: Various examples and schemes pertaining to NB-IoT physical random access channel (PRACH) resource partitioning and multiple grants in random access response (RAR) for early data transmission (EDT are described. A network node schedules multiple grants for EDT during a random access (RA) procedure with a user equipment (UE). The network node transmits to the UE a message indicating the multiple grants mapped to a maximum broadcast transport block size (TBS) configured for each of one or more preamble resource of a plurality of preamble resources. The UE calculates a TBS that fits an uplink (UL) data packet of the UE. The UE selects one or more PRACH resources for EDT for the TBS based on a wireless communication coverage of the UE by the network node. The UE transmits to the network node in the RA procedure a first message (Msg1) indicating the selected one or more PRACH resources.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 23, 2019
    Inventors: Gilles Charbit, Shiang-Jiun Lin, Li-Chuan Tseng, Per Johan Mikael Johansson
  • Patent number: 10257723
    Abstract: A method of reporting UE measurement state information in RLF report is provided. A UE performs radio measurements of a serving cell and neighbor cells in a mobile communication network. The UE evaluates a measurement reporting criteria and attempts to access the network to deliver a measurement report if the criteria is met. The UE then detects a radio link failure or a handover failure event and reconnects to the network by performing RRC reestablishment or RRC establishment. Finally, the UE transmits a failure event report to the network. The failure event report comprises UE measurement state information corresponds to the failure event. The UE measurement state information helps the network to determine whether to apply corrective actions to mitigate the failure.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 9, 2019
    Assignee: HFI Innovation INC.
    Inventors: Per Johan Mikael Johansson, Shiang-Jiun Lin, Yih-Shen Chen, William Plumb
  • Publication number: 20190104553
    Abstract: A method of high reliability and early data transmission (EDT) is proposed. EDT allows one uplink transmission (optionally) followed by one downlink data transmission during a random-access channel (RACH) procedure, which can reduce the signaling overhead and save UE power. To improve reliability, for uplink EDT, there would be different set of RACH reattempt parameters in the UE for different types of access. For downlink EDT, there would be an indication in the paging message to trigger whether the UE would use legacy RACH or not. Further, the configuration for PRACH resource for EDT can be independent to legacy PRACH resource configuration. Under certain conditions, UE can fallback to legacy RACH procedure for high reliability.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Inventors: Per Johan Mikael Johansson, Shiang Jiun Lin, Li-Chuan Tseng, Gilles Charbit
  • Publication number: 20190104564
    Abstract: Various examples and schemes pertaining to conditional radio resource control (RRC) confirm messaging are described. A user equipment (UE) communicates with a network node of a wireless network. In communicating with the network node, the UE transmits a first message to the network node and receives a second message from the network node responsive to the transmitting of the first message. The UE also determines whether to transmit a third message to the network node acknowledging receipt of the second message. That is, transmission of the third message as a confirmation of receipt of the second message is conditional or otherwise optional so as to reduce signaling overhead.
    Type: Application
    Filed: September 27, 2018
    Publication date: April 4, 2019
    Inventors: Per Johan Mikael Johansson, Shiang-Jiun Lin, Li-Chuan Tseng, Gilles Charbit
  • Publication number: 20190104470
    Abstract: Various examples and schemes pertaining machine-to-machine (M2M) semi-persistent scheduling (SPS) in wireless communications are described. A user equipment (UE) receives a control signal from a network node of a wireless network. The UE applies, based on the control signal, an SPS configuration such that the UE enters one of one or more low-power modes between two adjacent SPS occasions.
    Type: Application
    Filed: September 27, 2018
    Publication date: April 4, 2019
    Inventors: Per Johan Mikael Johansson, Shiang-Jiun Lin, Li-Chuan Tseng, Gilles Charbit
  • Patent number: 10219255
    Abstract: Apparatus and methods are provided for TDM uplink transmission on multiple serving cells with single transmitter. In one novel aspect, the UE selects a serving cell for an UL transmission subframe based on a TDM selection rule. In one embodiment, the switching rule involves identifying one or more serving cells with a highest UL transmission priority and a serving-cell priority rule. In another novel aspect, the UE drops a selected part of the UL transmission within the overlap region based on one or more switching rules, which include dropping a last OFDM symbol, dropping a portion of a last OFDM symbol of the SRS with combing structure, dropping a partial CP of a first OFDM symbol of the second serving cell, and dropping a partial tail of a last OFDM symbol of the first serving cell and partial CP of a first OFDM symbol of the second serving cell.
    Type: Grant
    Filed: January 21, 2018
    Date of Patent: February 26, 2019
    Assignee: HFI Innovation Inc.
    Inventors: Min Wu, Xiangyang Zhuang, Chien-Hwa Hwang, Shiang-Jiun Lin
  • Publication number: 20190053157
    Abstract: Various examples and schemes pertaining to differentiation of user equipment (UE) in narrowband IoT (NB-IoT) are described. A processor of a UE generates a signal containing UE-specific information that is specific to the UE. The processor transmits the signal to a network node of a wireless network. The processor then receives a response from the network node, the response comprising an access stratum (AS) configuration created by the network node based on the UE-specific information. The processor also applies the AS configuration which reduces power consumption of the UE.
    Type: Application
    Filed: August 9, 2018
    Publication date: February 14, 2019
    Inventors: Shiang-Jiun Lin, Per Johan Mikael Johansson, Li-Chuan Tseng, Gilles Charbit
  • Patent number: 10206176
    Abstract: Concepts and examples pertaining to efficient coding switching and modem resource utilization in wireless communication systems are described. A processor of a modem of a user equipment (UE), configured with at least a first-capacity decoder and at least a second-capacity decoder, receives a common virtual carrier (CVC), a dedicated virtual carrier (DVC), or both. The CVC contains common information shared by multiple UEs, control information for the UE, and/or data information related to first data destined for the UE. The DVC contains control information for the UE, the first data, or a combination thereof. The first-capacity decoder decodes data of a small size up to a low data rate. The second-capacity decoder decodes data of a large size up to a high data rate. The processor determines whether to decode the first data using the first-capacity decoder or the second-capacity decoder based on the data information in the CVC.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 12, 2019
    Assignee: MEDIATEK INC.
    Inventors: Wei-De Wu, Pei-Kai Liao, Hsuan-Li Lin, Shiang-Jiun Lin, Wei-Jen Chen, Li-Chuan Tseng
  • Patent number: 10159092
    Abstract: Methods and apparatus are provided contention based uplink data transmission. In one novel aspect, the contention-based uplink data channel is used to transmit the data directly to the network. In one embodiment, the UE selects an UL data channel from a set of preconfigured uplink contention based data channels and sends the UL data transmission on the selected UL data channel. In one embodiment, the contention based UL data has a narrow bandwidth with a long CP such that the TA is not needed from the base station. In another embodiment, a small signaling payload is included in the CB UL data transmission if the size of the data contents cannot be fit in the UL data channel. In one embodiment, the signaling payload is the BSR. The UE, subsequently, receives an UL grant and sends the remaining data contents using the allocated data channel in the UL grant.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: December 18, 2018
    Assignee: HFI Innovation INC.
    Inventors: Shiang-Jiun Lin, Gilles Charbit, I-Kang Fu
  • Patent number: 10057018
    Abstract: A method of DRX operation enhancement in adaptive TDD systems is proposed. A UE configures and enters DRX operation in an LTE/LTE-A mobile communication network. The UE obtains adaptive TDD configuration information from a base station. The adaptive TDD configuration information comprises an actual TDD configuration and a reference TDD configuration. The UE performs DRX timer counting and HARQ timer counting based on the reference TDD configuration. The UE also synchronizes DRX status with the base station. With the reference TDD configuration, it can avoid the potential misunderstanding between eNB and UE regarding DRX and HARQ RTT timing when TDD configuration changes.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: August 21, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shiang-Jiun Lin, Min Wu, Chien-Hwa Hwang, Xiangyang Zhuang
  • Patent number: 10045351
    Abstract: Systems and Methods for supporting carrier aggregation with different TDD configurations are proposed. In a first novel aspect, corresponding apparatus structure is described. In a second novel aspect, aggregation constraint is discussed. In a third novel aspect, transceiving mechanisms over multiple component carriers in DL/UL overlapped subframes are proposed. For simultaneous DL/UL transceiving, band combination indication methods are proposed, and HARQ feedback mechanisms are proposed. For non-simultaneous DL/UL transceiving, transceiving configuration methods are proposed, and the same HARQ feedback mechanisms are proposed. In a fourth novel aspect, CQI/RLM/RRM measurement mechanisms are proposed. In a fifth novel aspect, UE capability signaling mechanisms are proposed. The objective is to support flexible aggregation, to enhance DL data throughout, and to improve UL transmit power efficiency.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: August 7, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shiang-Jiun Lin, Pei-Kai Liao, Meng-Ying Tsai, Yih-Shen Chen
  • Publication number: 20180146470
    Abstract: Apparatus and methods are provided for TDM uplink transmission on multiple serving cells with single transmitter. In one novel aspect, the UE selects a serving cell for an UL transmission subframe based on a TDM selection rule. In one embodiment, the switching rule involves identifying one or more serving cells with a highest UL transmission priority and a serving-cell priority rule. In another novel aspect, the UE drops a selected part of the UL transmission within the overlap region based on one or more switching rules, which include dropping a last OFDM symbol, dropping a portion of a last OFDM symbol of the SRS with combing structure, dropping a partial CP of a first OFDM symbol of the second serving cell, and dropping a partial tail of a last OFDM symbol of the first serving cell and partial CP of a first OFDM symbol of the second serving cell.
    Type: Application
    Filed: January 21, 2018
    Publication date: May 24, 2018
    Inventors: Min Wu, Xiangyang Zhuang, Chien-Hwa Hwang, Shiang-Jiun Lin
  • Patent number: 9924412
    Abstract: A method of handling buffer status report for a mobile device capable of UL MIMO and/or capable of receiving and/or transmitting on a plurality of component carriers in a wireless communication system is disclosed. The method comprises generating at least a buffer size table each including a plurality of indexes according to the maximum uplink data transmission rate, wherein some of the plurality of indexes each is used for indicating a data amount in an uplink buffer of the mobile device for the buffer status report.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 20, 2018
    Assignee: ACER INCORPORATED
    Inventors: Shiang-Jiun Lin, Chun-Chia Chen, Tzu-Ming Lin, Chun-Yen Wang
  • Publication number: 20180070302
    Abstract: Concepts and examples pertaining to efficient coding switching and modem resource utilization in wireless communication systems are described. A processor of a modem of a user equipment (UE), configured with at least a first-capacity decoder and at least a second-capacity decoder, receives a common virtual carrier (CVC), a dedicated virtual carrier (DVC), or both. The CVC contains common information shared by multiple UEs, control information for the UE, and/or data information related to first data destined for the UE. The DVC contains control information for the UE, the first data, or a combination thereof. The first-capacity decoder decodes data of a small size up to a low data rate. The second-capacity decoder decodes data of a large size up to a high data rate. The processor determines whether to decode the first data using the first-capacity decoder or the second-capacity decoder based on the data information in the CVC.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Inventors: Wei-De Wu, Pei-Kai Liao, Hsuan-Li Lin, Shiang-Jiun Lin, Wei-Jen Chen, Li-Chuan Tseng
  • Patent number: 9913255
    Abstract: Apparatus and methods are provided for TDM uplink transmission on multiple serving cells with single transmitter. In one novel aspect, the UE selects a serving cell for an UL transmission subframe based on a TDM selection rule. In one embodiment, the switching rule involves identifying one or more serving cells with a highest UL transmission priority and a serving-cell priority rule. In another novel aspect, the UE drops a selected part of the UL transmission within the overlap region based on one or more switching rules, which include dropping a last OFDM symbol, dropping a portion of a last OFDM symbol of the SRS with combing structure, dropping a partial CP of a first OFDM symbol of the second serving cell, and dropping a partial tail of a last OFDM symbol of the first serving cell and partial CP of a first OFDM symbol of the second serving cell.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 6, 2018
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Min Wu, Xiangyang Zhuang, Chien-Hwa Hwang, Shiang-Jiun Lin
  • Publication number: 20170303148
    Abstract: A method of reporting UE measurement state information in RLF report is provided. A UE performs radio measurements of a serving cell and neighbor cells in a mobile communication network. The UE evaluates a measurement reporting criteria and attempts to access the network to deliver a measurement report if the criteria is met. The UE then detects a radio link failure or a handover failure event and reconnects to the network by performing RRC reestablishment or RRC establishment. Finally, the UE transmits a failure event report to the network. The failure event report comprises UE measurement state information corresponds to the failure event. The UE measurement state information helps the network to determine whether to apply corrective actions to mitigate the failure.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: Per Johan Mikael Johansson, Shiang-Jiun Lin, Yih-Shen Chen, William Plumb
  • Patent number: 9794839
    Abstract: A method of radio link monitoring (RLM) and radio link failure (RLF) handling over a small cell network is proposed. In a wireless network, a user equipment (UE) establishes a radio resource control (RRC) connection with a base station (eNB), which is UE anchor. The UE applies carrier aggregation for multiple component carriers (CCs) configured as multiple serving cells. The aggregated serving cells are served by the anchor eNB and other drift eNB(s). The UE performs RLM/RLF over PCELL and SCELL belonging to corresponding cell groups. When RLF happens in a serving cell, the UE and the eNB apply certain actions over the serving cell or all serving cells in the group. RLF procedures in anchor eNB and in drift eNB are proposed. Both UE side and network side behaviors are included.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: October 17, 2017
    Assignee: MEDIATEK INC.
    Inventors: Shiang-Jiun Lin, Yuanyuan Zhang, Per Johan Mikael Johansson
  • Patent number: 9794803
    Abstract: Solutions to support the coexistence of legacy UEs and new released UEs in adaptive TDD systems are proposed. Methods of TDD grouping, RACH (random access channel) resource allocation, and DL/UL data transmission and HARQ (Hybrid Automatic Repeat Request) process to serve legacy UEs without interfering the operation of new released UEs are proposed. With the methods proposed in this invention, both the legacy UEs and the new released UEs can be served in the adaptive TDD systems and the data transmission from the legacy UEs would not interfere the data reception of the new released UEs.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: October 17, 2017
    Assignee: MEDIATEK INC.
    Inventors: Shiang-Jiun Lin, Chien-Hwa Hwang, Xiangyang Zhuang