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    ACKNOWLEDGEMENT, ERROR RECOVERY AND BACKOFF OPERATION OF UPLINK MULTI-USER MULTIPLE-INPUT-MULTIPLE-OUTPUT COMMUNICATION IN WIRELESS NETWORKS
    23.
    发明申请
    ACKNOWLEDGEMENT, ERROR RECOVERY AND BACKOFF OPERATION OF UPLINK MULTI-USER MULTIPLE-INPUT-MULTIPLE-OUTPUT COMMUNICATION IN WIRELESS NETWORKS 有权
    无线网络中上行多用户多输入多输出通信的确认，错误恢复和备份操作

    公开(公告)号：US20150071051A1

    公开(公告)日：2015-03-12

    申请号：US14023204

    申请日：2013-09-10

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Chunhui Zhu ,  Youngsoo Kim

    IPC: H04W28/04

    CPC classification number: H04W72/121 ,  H04B7/0452 ,  H04W72/1278 ,  H04W74/08

    Abstract: Wireless communication in a wireless network comprises obtaining a transmission opportunity period (TXOP) for communicating with an access point (AP) over a wireless communication channel. An announcement is sent to the AP to share the transmission opportunity period among wireless stations, as a multi-user transmission opportunity period for simultaneously transmitting data from said wireless stations to the AP on multiple uplink (UL) spatial streams over the wireless channel. Correctly received UL frames received by the AP are acknowledged. Error recovery and backoff processing are performed upon loss of communication information based on frame type.

    Abstract translation: 在无线网络中的无线通信包括获得用于通过无线通信信道与接入点（AP）进行通信的传输机会时段（TXOP）。 作为用于通过无线信道在多个上行链路（UL）空间流上同时从所述无线站发送数据到AP的多用户传输机会时段，向AP发送通知以共享无线站之间的传输机会时段。 由AP接收到的正确接收的UL帧被确认。 在基于帧类型的通信信息丢失时执行错误恢复和退避处理。

    Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks
    24.
    发明授权
    Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks 有权

    公开(公告)号：US11451269B2

    公开(公告)日：2022-09-20

    申请号：US17240115

    申请日：2021-04-26

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Chunhui Zhu ,  Youngsoo Kim

    IPC: H04B7/04 ,  H04B7/0413 ,  H04W74/08 ,  H04B7/0452 ,  H04L1/18 ,  H04W72/12 ,  H04W84/12 ,  H04W72/00

    Abstract: Wireless communication in a wireless system using a multiple user transmission opportunity is provided. Data blocks at a wireless station are transmitted to multiple wireless receivers over a shared wireless communication medium. The data blocks are organized in order of transmission priority based on access categories. Contention for access to the communication medium during a transmission opportunity period is based on a backoff timer of each access category and the transmission priority. Upon successful contention for a transmission opportunity period, during the transmission opportunity period, a data block of a primary access category is wirelessly transmitted from the wireless station to one or more primary destination wireless receivers. Simultaneously, a data block of a secondary access category is wirelessly transmitted from the wireless station to one or more secondary destination wireless receivers.

    Display device having output voltage of display driver dropped
    26.
    发明授权
    Display device having output voltage of display driver dropped 有权

    公开(公告)号：US11341900B2

    公开(公告)日：2022-05-24

    申请号：US16770671

    申请日：2019-03-06

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Shinwook Choi ,  Youngsoo Kim ,  Kangmoon Seo

    IPC: G09G5/00 ,  G09G3/32 ,  H05B45/375 ,  H05B45/48

    Abstract: Disclosed is a display device including a power transformer converting an input voltage into a specified voltage, a display driver including a rectifier rectifying a voltage converted through the power transformer and a converter converting a voltage rectified through the rectifier based on a control signal for outputting an image, and a display panel receiving a converted voltage through the display driver to display the image. The display driver may include a voltage drop unit dropping a voltage input through the rectifier. Other various embodiments as understood from the specification are also possible.

    Electronic device and power supply
    27.
    发明授权
    Electronic device and power supply 有权

    公开(公告)号：US11218082B2

    公开(公告)日：2022-01-04

    申请号：US16930634

    申请日：2020-07-16

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Youngho Choi ,  Youngsoo Kim ,  Youngnam Yoon ,  Sung-Bum Jung ,  Shinwook Choi

    IPC: H02M3/335 ,  H02M7/219 ,  H02M7/217 ,  H02M1/42 ,  H02M3/07

    Abstract: A power supply is provided. The power supply includes: a switching module including switching elements and is configured to receive rectified power; a transformer configured to transform first power received from the switching module; an outputter including first and second switching elements, and is configured to receive the transformed first power from the transformer and output an output voltage that follows a preset reference voltage; and a controller configured to control the switching module to operate in a full bridge mode or a half bridge module based on a peak voltage of the rectified power, adjust a switching frequency of the switching module based on the output voltage, control switching of the first and second switching elements based on the output voltage, and adjust a duty ratio of each of the first and second switching elements based on the rectified power.

    Method and apparatus to achieve collision-free random access
    30.
    发明授权
    Method and apparatus to achieve collision-free random access 有权

    公开(公告)号：US09769848B2

    公开(公告)日：2017-09-19

    申请号：US14832811

    申请日：2015-08-21

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Amar Prakash Azad ,  Sujit Jos ,  Sandhya Patil ,  Kannan Govindan ,  Kiran Bynam ,  Manoj Choudhary ,  Taeseok Kim ,  Youngsoo Kim

    IPC: H04W4/00 ,  H04W74/08 ,  H04W48/10 ,  H04W84/12

    CPC classification number: H04W74/0816 ,  H04W48/10 ,  H04W84/12

    Abstract: A method and apparatus for a collision-free carrier sense multiple access (CSMA) are provided. The method of a node associated with a beacon enabled carrier sense multiple access (CSMA)-based wireless communication network through an access point (AP) includes receiving a beacon from the AP, the beacon comprising a back-off prime number and a beacon random number, and generating a back-off interval based on the beacon random number, the back-off prime number, a mapped identification (ID) of the node, and a current time slot of a frame of the beacon. The method and apparatus provide a collision-free CSMA scheme for a beacon enabled CSMA-based wireless communication network. In the collision-free CSMA scheme, uniformly distributed back-off intervals may be generated in a distributed fashion at each node for a CSMA-based wireless communication network. The back-off intervals may be correlated among the nodes even though the nodes do not communicate with each other.

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