公开(公告)号：US20200351881A1

公开(公告)日：2020-11-05

申请号：US16932952

申请日：2020-07-20

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Tao Chen ,  Chien-Chang Li

IPC: H04W72/04 ,  H04W56/00 ,  H04W48/10 ,  H04W48/16

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.

公开(公告)号：US11533118B2

公开(公告)日：2022-12-20

申请号：US17096382

申请日：2020-11-12

Applicant: MediaTek Inc.

Inventor： Mingchun Chiang ,  Fucheng Wang ,  Tsang-Wei Yu ,  Jun Ma ,  Tao Chen ,  Wen Yang Chou

IPC: H04J11/00 ,  H04W48/16

Abstract: Various examples with respect to synchronization signal block (SSB) raster shift in mobile communications are described. A processor of a user equipment (UE) performs an initial cell search to identify a cell among one or more cells of a wireless communication system. The processor then camps on the identified cell. In performing the initial cell search, the processor scans through a plurality of SSB entries for frequency bands below 3 GHz with a SSB raster spacing and a SSB raster offset frequency that support sub-carrier spacing (SCS) spaced channel raster and 100 kHz channel raster for both 15 kHz SCS and 30 kHz SCS. A minimum channel bandwidth at 5 MHz or higher for 15 kHz SCS or at 10 MHz or higher for 30 kHz SCS is supported. The SSB raster spacing is a common multiple of 15 kHz and 100 kHz. The SSB raster offset frequency for 100 kHz channel raster is a multiple of 30 kHz plus/minus 10 kHz.

公开(公告)号：US20210067262A1

公开(公告)日：2021-03-04

申请号：US17096382

申请日：2020-11-12

Applicant: MediaTek Inc.

Inventor： Mingchun Chiang ,  Fucheng Wang ,  Tsang-Wei Yu ,  Jun Ma ,  Tao Chen ,  Wen Yang Chou

IPC: H04J11/00 ,  H04W48/16

Abstract: Various examples with respect to synchronization signal block (SSB) raster shift in mobile communications are described. A processor of a user equipment (UE) performs an initial cell search to identify a cell among one or more cells of a wireless communication system. The processor then camps on the identified cell. In performing the initial cell search, the processor scans through a plurality of SSB entries for frequency bands below 3 GHz with a SSB raster spacing and a SSB raster offset frequency that support sub-carrier spacing (SCS) spaced channel raster and 100 kHz channel raster for both 15 kHz SCS and 30 kHz SCS. A minimum channel bandwidth at 5 MHz or higher for 15 kHz SCS or at 10 MHz or higher for 30 kHz SCS is supported. The SSB raster spacing is a common multiple of 15 kHz and 100 kHz. The SSB raster offset frequency for 100 kHz channel raster is a multiple of 30 kHz plus/minus 10 kHz.

公开(公告)号：US10764892B2

公开(公告)日：2020-09-01

申请号：US15868015

申请日：2018-01-11

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Tao Chen ,  Chien-Chang Li

IPC: H04W72/04 ,  H04W56/00 ,  H04W48/10 ,  H04W48/16 ,  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, wherein 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, wherein 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.

公开(公告)号：US20190014576A1

公开(公告)日：2019-01-10

申请号：US16127533

申请日：2018-09-11

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Tao Chen ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04L1/18 ,  H04L27/26

Abstract: A flexible radio frame structure for both FDD and TDD is proposed. Under the flexible frame structure, each radio frame consists of a plurality of slots, and each slot within a radio frame has a flexible slot type. As a basic scheduling unit, each slot can be configured by the base station via physical layer signaling. The slot type can be changed dynamically based on current system needs to support different DL/UL ratios and latency requirements. With the support of different slot types and asynchronous DL/UL HARQ operation, HARQ operation for DL/UL can share the same HARQ timing to simplify the system design and reduce implementation complexity.

公开(公告)号：US20170347268A1

公开(公告)日：2017-11-30

申请号：US15681740

申请日：2017-08-21

Applicant: MEDIATEK INC.

Inventor： Hua-Min Chen ,  Tao Chen ,  Min Wu

IPC: H04W16/02 ,  H04W72/04 ,  H04B1/7143 ,  H04W72/12 ,  H04W4/00

CPC classification number: H04W16/02 ,  H04B1/7143 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0053 ,  H04W4/70 ,  H04W72/0453 ,  H04W72/1289

Abstract: Methods and apparatus of resource allocation (RA) for low cost machine communication type (LC-MTC) user equipments (UEs) are provided. A UE obtains one or multiple sets of resources in a mobile communication network. Each set of resources belongs to a narrow sub-band in a wider channel bandwidth, wherein the narrow sub-band comprises a plurality of contiguous physical resource blocks (PRBs). The UE determines a first set of resources from the one or multiple sets of resources based on a physical layer control signaling and transmits or receives radio signals using the first set of resources within a predefined duration. In a coverage extension mode, the UE determines a second set of resources according to a hopping pattern, while the first and the second sets of resources are occupied for transmission at different radio subframes. The UE then transmits or receives radio signals using the second set of resources.

公开(公告)号：US11689317B2

公开(公告)日：2023-06-27

申请号：US17368575

申请日：2021-07-06

Applicant: MediaTek Inc.

Inventor： Tun-Ping Huang ,  Mao-Ching Chiu ,  Wei-De Wu ,  Chia-Wei Tai ,  Tien-Yu Lin ,  Tao Chen

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/13 ,  H04L1/1607 ,  H04L1/1812

CPC classification number: H04L1/0061 ,  H03M13/13 ,  H04L1/1614 ,  H04L1/1812

Abstract: Examples pertaining to re-transmission cyclic redundancy check (CRC) for polar coding incremental-redundancy hybrid automatic repeat request (IR-HARQ) are described. An apparatus (e.g., UE) encodes a plurality of information bits using a polar code to generate a polar code block (CB). The apparatus performs one or more transmissions of the polar CB using hybrid automatic repeat request (HARQ) by performing an initial transmission of the polar CB and performing a re-transmission of the polar CB with a re-transmission cyclic redundancy check (ReTX CRC).

公开(公告)号：US11601944B2

公开(公告)日：2023-03-07

申请号：US17847571

申请日：2022-06-23

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Chia-Chun Hsu ,  Tao Chen

IPC: H04W72/04 ,  H04W72/0453 ,  H04W76/27 ,  H04L5/00 ,  H04W80/02

Abstract: Apparatus and methods are provided for virtual carrier operation in wireless systems with large carrier bandwidth. In one novel aspect, virtual carrier (VC) with a block of physically contiguous radio resources within a component carrier is configured. In one embodiment, the UE configures a downlink (DL) common virtual carrier (CVC) and an uplink (UL) CVC, which carry control information for the UE, and one or more DL/UL dedicated VCs (DVCs), which carry data services. In one embodiment, the UE obtains the CVC configuration information including the channel bandwidth and the physical location through system information. In another embodiment, the UE obtains DVC configuration through an RRC-layer signaling. In another novel aspect, the UE obtains a VC configuration switch command through either a MAC signal or a PHY signal, and subsequently reconfigures one or more configured VCs based on the received switch command.

公开(公告)号：US20220330248A1

公开(公告)日：2022-10-13

申请号：US17847571

申请日：2022-06-23

Applicant: MEDIATEK INC.

Inventor： Pei-kai Liao ,  Chia-Chun Hsu ,  Tao Chen

IPC: H04W72/04 ,  H04W76/27 ,  H04L5/00

Abstract: Apparatus and methods are provided for virtual carrier operation in wireless systems with large carrier bandwidth. In one novel aspect, virtual carrier (VC) with a block of physically contiguous radio resources within a component carrier is configured. In one embodiment, the UE configures a downlink (DL) common virtual carrier (CVC) and an uplink (UL) CVC, which carry control information for the UE, and one or more DL/UL dedicated VCs (DVCs), which carry data services. In one embodiment, the UE obtains the CVC configuration information including the channel bandwidth and the physical location through system information. In another embodiment, the UE obtains DVC configuration through an RRC-layer signaling. In another novel aspect, the UE obtains a VC configuration switch command through either a MAC signal or a PHY signal, and subsequently reconfigures one or more configured VCs based on the received switch command.

公开(公告)号：US20220272705A1

公开(公告)日：2022-08-25

申请号：US17743320

申请日：2022-05-12

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Tao Chen ,  Chien-Chang Li

IPC: H04W72/04 ,  H04W56/00 ,  H04W48/10 ,  H04W48/16

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.