公开(公告)号：US10904821B2

公开(公告)日：2021-01-26

申请号：US16401381

申请日：2019-05-02

Applicant: MEDIATEK INC.

Inventor： Yih-Shen Chen ,  Chun-Fan Tsai ,  Tsang-Wei Yu

IPC: H04W88/02 ,  H04W48/02 ,  H04W84/04

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cell. The controller receives first barring information and second barring information from the cell via the wireless transceiver, and ignores the first barring information in response to the UE supporting network-based Cell-specific Reference Signal (CRS) interference mitigation. Also, the controller allows the UE to access the cell in response to the UE supporting network-based CRS interference mitigation and the second barring information indicating that the cell is not barred.

公开(公告)号：US10420080B2

公开(公告)日：2019-09-17

申请号：US15473628

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Yih-Shen Chen ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04J3/00 ,  H04W72/04 ,  H04W52/14 ,  H04W72/10 ,  H04W72/08 ,  H04L5/00 ,  H04W84/04 ,  H04W52/16 ,  H04W52/28

Abstract: Methods and apparatus are provided for transmission preemption and its indication. In one novel aspect, the UE receives a downlink resource assignment and determines whether an ultra-low latency (ULL) alert signal exists, wherein the ULL alert signal indicates a set of soft bits are overridden. The UE discards the set of soft bits from the overridden resources upon determining the ULL alert signal exists. In one embodiment, the ULL alert signal resides in the assignment subframe, and the overridden soft bits are in the assignment subframe. The alert timing for the ULL alert signal is preconfigured. In another embodiment, the ULL alert signal resides in a subframe that is right after the assignment subframe. The alert signal is enabled through an enabling of an enhanced mobile broadband and ULL service. The alter signal indicates a superset of the overridden soft bits or part of the overridden soft bits.

公开(公告)号：US20190141567A1

公开(公告)日：2019-05-09

申请号：US16178769

申请日：2018-11-02

Applicant: MEDIATEK INC.

Inventor： Yung-Hsiang Liu ,  Chia-Chun Hsu ,  Yih-Shen Chen

IPC: H04W28/06 ,  H04L29/06

Abstract: A method of uplink data compression (UDC) error handling is proposed to handle UDC error and to maintain compression memory synchronization between a transmitter and a receiver. Specifically, UDC checksum operation is proposed to maintain compression memory synchronization between compressor at the transmitter and decompressor at the receiver. The transmitter attaches a checksum to each UDC packet and keeps processed uncompressed data in a compression memory. The receiver decompresses each UDC packet and keeps processed uncompressed data in a compression memory. If the UDC compression memory is unsynchronized and a checksum mismatch is detected, the receiver sends an error indication to the transmitter, which resets its compression memory. The transmitter sends a reset indication to the receiver to reset its compression memory. The UDC compression memory is re-synchronized and UDC is restarted from the beginning.

公开(公告)号：US10212617B2

公开(公告)日：2019-02-19

申请号：US14859604

申请日：2015-09-21

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen

IPC: H04W72/04 ,  H04W24/08 ,  H04W24/10 ,  H04W36/00 ,  H04W64/00 ,  H04W76/19 ,  H04W88/02 ,  H04W88/08

Abstract: A method of throughput and data volume measurement for minimization of drive test (MDT) is proposed. A base station establishes a radio resource control (RRC) connection with a user equipment (UE) in a mobile communication network. The base station or UE measures transmitted or received data volume during a transmission time of a data burst between the base station and the UE. When the data burst spans multiple measurement periods and the data burst is split at each measurement period boundary. For each measurement period, data volume during the measurement period is measured to generate a measurement result. When throughput measurement is performed by the network, the base station receives location information that is available during the transmission time of the data burst. The data volume measurement is logged with time stamp such that each measurement result can correlated with the location information.

公开(公告)号：US20180227824A1

公开(公告)日：2018-08-09

申请号：US15949474

申请日：2018-04-10

Applicant: MEDIATEK INC.

Inventor： Yih-Shen Chen ,  Chia-Chun Hsu ,  Per Johan Mikael Johansson

IPC: H04W36/32 ,  H04W36/00

CPC classification number: H04W36/32 ,  H04W36/0083 ,  H04W36/0094 ,  H04W36/04 ,  H04W36/245

Abstract: Methods for enhanced heterogeneous network mobility are proposed. In a first novel aspect, the cell size of a target cell is considered when determining the TTT value. In one embodiment, pico-specific Time-to-Trigger (TTT) value is configured. When the target cell to be measured is a picocell, pico-specific TTT value is applied. In a second novel aspect, precise mobility state estimation (MSE) is achieved by considering the effect of cell size. In one embodiment, when counting cell changes, a cell change to/from a small cell would be counted to lesser extent than a cell change between large cells. UE uses effective parameters for measurement evaluation, by applying better speed state estimation with speed scaling and by applying parameter differentiation that can be dependent on cell size.

公开(公告)号：US10028109B2

公开(公告)日：2018-07-17

申请号：US15172258

申请日：2016-06-03

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Chia-Chun Hsu ,  Yih-Shen Chen ,  Chien-Chun Huang-Fu ,  Yu-Syuan Jheng ,  Chia-Hung Tsai

IPC: H04B7/00 ,  H04W4/08 ,  H04W4/10 ,  H04W76/40 ,  H04W36/32 ,  H04W4/06 ,  H04W72/00 ,  H04W36/08 ,  H04W76/00 ,  H04W74/00 ,  H04L5/00 ,  H04L12/18 ,  H04W24/08 ,  H04W36/00 ,  H04W36/30 ,  H04W72/12

CPC classification number: H04W4/08 ,  H04L5/0037 ,  H04L12/185 ,  H04L12/1886 ,  H04W4/06 ,  H04W4/10 ,  H04W24/08 ,  H04W36/0007 ,  H04W36/0083 ,  H04W36/08 ,  H04W36/30 ,  H04W36/32 ,  H04W72/00 ,  H04W72/005 ,  H04W72/121 ,  H04W74/006 ,  H04W76/40

Abstract: A method of supporting group communication over LTE MBMS is provided. A UE first establishes a unicast Evolved Packet Service (EPS) bearer in an LTE network for group communication. The UE belongs to a communication group having a communication group ID. The UE receives access information from the network for monitoring downlink (DL) multicast traffic of the DL group communication based on a multicast decision. The UE is then ready for monitoring a multicast Multimedia Broadcast Multicast Service (MBMS) bearer for receiving the DL multicast traffic. The multicast MBMS bearer is associated with a Temporary Mobile Group Identifier (TMGI), and wherein the TMGI is associated with the communication group ID. In one embodiment, the access information comprises mapping information between the TMGI and the communication group ID.

公开(公告)号：US09807659B2

公开(公告)日：2017-10-31

申请号：US14753840

申请日：2015-06-29

Applicant: MEDIATEK INC.

Inventor： I-Kang Fu ,  Yih-Shen Chen ,  William Plumb ,  Per Johan Mikael Johansson

IPC: H04Q7/10 ,  H04W36/20 ,  H04W24/10 ,  H04W88/06

CPC classification number: H04W36/20 ,  H04W24/10 ,  H04W88/06

Abstract: A method of implicit signaling to support In-Device coexistence interference avoidance is provided. A UE sends an IDC interference indication to an eNB. The indication indicates that a serving frequency becomes unusable due to a coexistence interference problem. The indication does not explicitly indicate a frequency index or a frequency location of the unusable serving frequency. The eNB determines the serving frequency as unusable in an implicit manner. The eNB also determines an implied unusable frequency region based on the received IDC indication. The implied unusable frequency region is between the serving frequency and the ISM band. In one advantageous aspect, the eNB configures a condition for the UE, such that the UE is refrained from sending IDC interference indications unless the condition is satisfied.

公开(公告)号：US20170238284A1

公开(公告)日：2017-08-17

申请号：US15423982

申请日：2017-02-03

Applicant: MEDIATEK INC.

Inventor： Li-Chuan Tseng ,  Per Johan Mikael Johansson ,  Yih-Shen Chen

IPC: H04W72/04 ,  H04W24/08 ,  H04W76/02 ,  H04W74/08

CPC classification number: H04W72/042 ,  H04L5/001 ,  H04L5/0091 ,  H04L5/0098 ,  H04L67/12 ,  H04W24/08 ,  H04W72/0453 ,  H04W74/0833 ,  H04W74/0866

Abstract: A novel and efficient multi-carrier operation mechanism is proposed to maintain the capacity and reliability for NB-IOT systems. First, the functional separation on anchor NB-IOT carrier and data NB-IOT carriers is defined. Transportation of system broadcast information, including synchronization signal (NB-PSS/NB-SSS) and NB-MIB (NB-PBCH) and paging are on anchor carrier, RACH procedure and Data transmission and reception are on data carrier. Second, UE switching between anchor and data carriers. UE on anchor carrier switches to data carrier via paging, RRC signaling or cross-carrier scheduling. On the other hand, UE on data carrier switches back to anchor carrier after transmission or reception complete (right-after or after time-out).

公开(公告)号：US09661682B2

公开(公告)日：2017-05-23

申请号：US15000264

申请日：2016-01-19

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Yih-Shen Chen

IPC: H04W36/08 ,  H04W76/04 ,  H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W72/12 ,  H04W16/32 ,  H04W24/04 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W76/27 ,  H04L1/1812 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0094 ,  H04W16/32 ,  H04W24/04 ,  H04W36/08 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/1289 ,  H04W74/0833 ,  H04W88/02 ,  H04W88/08

Abstract: Methods of multi-point carrier aggregation configuration and data forwarding are disclosed. In one embodiment of the invention, a primary connection is established between a UE and a primary base station in a primary cell with a first UE-ID. A second connection is configured between the UE and a second base station in a secondary cell with a second UE-ID. Component carriers from the primary and the second connections are configured and aggregated. Mobility management functions are performed on the primary connection. In another embodiment of the current invention, a first UE data is received from a primary connection with a UE connecting to a first base station, a second UE data is received from a second base station. The first UE data and the second UE data are combined. A third UE data from a network entity is distributed to the first and the second base station.

公开(公告)号：US09661678B2

公开(公告)日：2017-05-23

申请号：US14706967

申请日：2015-05-08

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

IPC: H04W76/02 ,  H04W36/08 ,  H04W36/24 ,  H04W48/00 ,  H04W40/36 ,  H04W36/00

CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.