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公开(公告)号：US11902063B2
公开(公告)日：2024-02-13
申请号：US17324397
申请日：2021-05-19
Applicant: Mediatek Inc.
Inventor： Yiju Liao , Chien Hwa Hwang , Chien-Chang Li
CPC classification number: H04L27/14 , H04L5/0048 , H04L5/0051 , H04L5/0053 , H04L5/0094 , H04L25/0202 , H04W76/27 , H04L5/001 , H04L5/0007 , H04W80/02
Abstract: A UE determines a first DCCH resource candidate in a first CORESET on a carrier, the first DCCH resource candidate including a first set of RBs. The UE also determines a first sequence of DMRSs that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first DCCH resource candidate in the frequency domain. The UE further determines a first reference location of the first set of RBs. The UE determines, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs. The UE obtains a channel estimation based on the first set of DMRSs; and The UE performs blind decoding of the first DCCH resource candidate based on the channel estimation.
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公开(公告)号：US11770811B2
公开(公告)日：2023-09-26
申请号：US17743320
申请日：2022-05-12
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Tao Chen , Chien-Chang Li
CPC classification number: H04W72/0453 , H04W48/10 , H04W48/16 , H04W56/0005 , H04W48/14
Abstract: In one novel aspect, a plurality of synchronization signal (SS) anchors within a block of a contiguous spectrum is configured in a wireless network. Each SS anchor is a primary SS anchor or a secondary SS anchor. The UE performs an initial access by detecting a first primary SS anchor and receives one or more virtual carrier configurations with corresponding SS anchors within the block of the contiguous spectrum. In another novel aspect, the UE performs an initial access through a first RF band with a first bandwidth and a first center frequency, receives a switching signal to switch from the first RF band to a second RF band with a second bandwidth and a second center frequency, the second bandwidth is different from the first bandwidth, and performs a RF bandwidth adaptation from the first RF band to the second RF band based on the adaptation signal.
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公开(公告)号：US20230209366A1
公开(公告)日：2023-06-29
申请号：US18117387
申请日：2023-03-03
Applicant: MEDIATEK INC.
Inventor： Chien-Hwa Hwang , Chien-Chang Li , Yi-Ju Liao , Pei-Kai Liao , Weidong Yang
IPC: H04W16/28 , H04W72/044 , H04L5/00 , H04W72/23 , H04L1/1829 , H04W74/08
CPC classification number: H04W16/28 , H04W72/046 , H04L5/0053 , H04W72/23 , H04L1/1861 , H04W74/08 , H04L5/0037 , H04B7/0617
Abstract: A new design for physical downlink control channel (PDCCH) is proposed for the next generation 5G new radio systems. A UE receives the configuration of a default control resource set (CORESET) in MIB/SIB from its serving base station. The default CORESET contains both common search space and UE-specific search space for candidate PDCCH transmission. A PDCCH in a default CORESET is mapped to physical resource in a distributed or localized manner. Specifically, various REG-to-CCE mapping rules are proposed to improve frequency diversity gain, or frequency selectivity gain, or to reduce latency of PDCCH processing. Further, to facilitate analog beamforming in mmWave systems, the default CORESET is transmitted in a synchronization signal (SS) block associated with a corresponding analog beam direction.
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4.发明授权公开(公告)号：US10827468B2
公开(公告)日：2020-11-03
申请号：US16202306
申请日：2018-11-28
Applicant: Mediatek Inc.
Inventor： Yiju Liao , Chien Hwa Hwang , Chien-Chang Li
Abstract: A method of wireless communication of a UE is provided. The UE receives a semi-static assignment from a network, indicating each of a plurality of symbol periods in a slot being assigned as one of: a downlink symbol period, a semi-static unknown symbol period, and an uplink symbol period. The UE receives a dynamic slot format indicator (SFI), the dynamic SFI indicating M of the plurality of symbol periods being reassigned dynamically from semi-static unknown symbol periods to symbol periods not being monitored by the UE for PDCCH data. The UE determines that a CORESET of Y symbol periods contains N of the M reassigned symbol periods. The UE (1) refrains from decoding data carried in the Y symbol periods of the CORESET or (2) decodes data carried in (Y-N) symbol periods of the CORESET with exclusion of data carried in the N reassigned symbol periods of the CORESET.
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公开(公告)号：US10440697B2
公开(公告)日：2019-10-08
申请号：US15852143
申请日：2017-12-22
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Bo-Si Chen , Chien-Chang Li
Abstract: Various solutions for coordination information transmission with respect to user equipment (UE) and network apparatus in mobile communications are described. A UE may receive downlink control information comprising coordination information from a first node of a wireless network. The coordination information may comprise interference management information. The UE may copy the coordination information and embed the coordination information in uplink control information. The UE may further transmit the uplink control information to a second node of the wireless network.
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Patent Agency Ranking
公开(公告)号：US10348431B2
公开(公告)日：2019-07-09
申请号：US15657430
申请日：2017-07-24
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Hsiao-Lan Chiang , Chien-Chang Li , Xiangyang Zhuang
Abstract: A method of small cell discovery and RSRP/RSRQ measurements in OFDM/OFDMA systems is proposed. A discovery reference signal (DRS) with low transmission frequency is introduced to support small cell detection within a short time, multiple small cell discovery, and accurate measurement of multiple small cells. The DRS consists of one or multiple reference signal types with the functionalities including timing and frequency synchronization, cell detection, RSRP/RSSI/RSRQ measurements, and interference mitigation. RE muting is configured for the DRS to reduce interference level from data to DRS for discovery and RSRP/RSRQ measurements for small cells.
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公开(公告)号：US20190158326A1
公开(公告)日：2019-05-23
申请号：US16191640
申请日：2018-11-15
Applicant: Mediatek, Inc.
Inventor： Yiju LIAO , Chien Hwa HWANG , Chien-Chang Li
Abstract: A UE determines a first DCCH resource candidate in a first CORESET on a carrier, the first DCCH resource candidate including a first set of RBs. The UE also determines a first sequence of DMRSs that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first DCCH resource candidate in the frequency domain. The UE further determines a first reference location of the first set of RBs. The UE determines, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs. The UE obtains a channel estimation based on the first set of DMRSs; and The UE performs blind decoding of the first DCCH resource candidate based on the channel estimation.
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公开(公告)号：US20180270835A1
公开(公告)日：2018-09-20
申请号：US15923326
申请日：2018-03-16
Applicant: Mediatek Inc.
Inventor： Bo-Si Chen , Weidong Yang , Chien-Chang Li
CPC classification number: H04W72/082 , H04W72/0446 , H04W72/10
Abstract: A first base station on a first cell determines to communicate in a first direction with one or more UEs on the first cell in a first time slot and a second time slot, the first time slot and the second time slot being consecutive, the one or more UEs including a first UE. The first base station further determines that communication with the first UE on the first cell in the first direction interferes with communication between a second base station and a second UE on a second cell in a second direction. Communication in the second direction having a priority higher that a priority of communication in the first direction. The first base station determines, in the first time slot, to communicate with the one or more UEs on the first cell in the second direction in the second time slot.
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公开(公告)号：US20170331606A1
公开(公告)日：2017-11-16
申请号：US15593091
申请日：2017-05-11
Applicant: MEDIATEK INC.
Inventor： Bo-Si Chen , Chien-Chang Li , Weidong Yang , Yih-Shen Chen
CPC classification number: H04L5/0048 , H04L5/0007 , H04L5/0091 , H04L27/0006 , H04W76/27
Abstract: A method of supporting uplink aperiodic sounding reference signal (SRS) transmission in licensed assisted access (LAA) wireless communication networks is provided. In one novel aspect, a base station can configure each UE with a group ID by RRC signaling, and then use DCI to signal the group to transmit SRS in the corresponding SC-FDMA symbol. A new cell specific RNTI is introduced for the group DCI. In a first embodiment, the DCI comprises a list of group IDs, each indicating a group ID for SRS transmission in the corresponding SC-FDMA symbol in the UpPTS. In a second embodiment, the DCI comprises a number of SC-FDMA symbols in the UpPTS and an offset value of the group ID for SRS transmission. The proposed method can trigger different groups of UEs in multiple SC-FDMA symbols in a flexible way.
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公开(公告)号：US20170302493A1
公开(公告)日：2017-10-19
申请号：US15474125
申请日：2017-03-30
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Chien-Chang Li , Bo-Si Chen , Yih-Shen Chen
CPC classification number: H04L27/2666 , H04L1/0029 , H04L1/0031 , H04L1/0038 , H04L1/1819 , H04L1/1822 , H04L1/1896 , H04L5/0007 , H04W48/16 , H04W72/0413 , H04W72/0473
Abstract: A flexible and efficient physical downlink control channel (PDCCH) signaling scheme that schedules physical uplink shared channel (PUSCH) transmission over multiple subframes with Hybrid Automatic Retransmission (HARQ) support is proposed. The PDCCH has a downlink control information (DCI) format that schedules PUSCH transmission over multiple subframes. The PUSCH transmission is associated with multiple HARQ processes with non-consecutive HARQ process IDs. Furthermore, the DCI format uses joint signaling to combine HARQ process indexes, new data indication (NDI), and redundancy version (RV) to reduce signaling overhead.
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