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    Apparatus and method for acquiring D2D synchronization information
    13.
    发明授权
    Apparatus and method for acquiring D2D synchronization information 有权

    公开(公告)号：US09801148B2

    公开(公告)日：2017-10-24

    申请号：US14707535

    申请日：2015-05-08

    Applicant: Samsung Electronics Co., Ltd

    Inventor： Hyun-Kyu Yu ,  Hyun-Seok Ryu ,  Seung-Hoon Park ,  Cheol Jeong ,  Sang-Won Choi ,  Peng Xue

    IPC: H04W56/00

    CPC classification number: H04W56/001

    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and method for acquiring synchronization information through the transmission and reception of signals between devices for device to device (D2D) communication is provided. A method for a user equipment (UE) in a wireless communication system includes detecting a synchronization signal of another UE in a predetermined measurement gap. The method also includes transmitting a detected result of the synchronization signal to an evolved Node B (eNB). A start time point of the measurement gap in a first measurement gap period and a start time point of the measurement gap in a second measurement gap period are different from each other.

    Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
    14.
    发明授权
    Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (QAM) based communication system 有权
    在基于旋转正交幅度调制（QAM）的通信系统中执行软解映射的方法和装置

    公开(公告)号：US09203681B2

    公开(公告)日：2015-12-01

    申请号：US14518356

    申请日：2014-10-20

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Ki Taek Bae ,  Peng Xue ,  Kyeong Yeon Kim ,  Navneet Basutkar ,  Ho Yang

    IPC: H04L27/38

    CPC classification number: H04L27/38 ,  H04L25/067

    Abstract: A method of performing a soft demapping, includes obtaining a signal from a symbol representing bits that is transmitted from a transmitter, and calculating a gradient of a reference line in a constellation for a bit based on a rotation angle and a channel state of the constellation. The method further includes selecting a candidate for each of lines that corresponds to a logic value of the bit from constellation points included in the constellation based on the signal and the gradient of the reference line, and calculating a log-likelihood ratio (LLR) of the bit based on the signal and the selected candidate for each of the lines.

    Abstract translation: 执行软解映射的方法包括从表示从发送器发送的比特的符号获得信号，并且基于星座的旋转角度和信道状态来计算比特的星座图中的参考线的梯度 。 该方法还包括：基于参考线的信号和斜率，从包括在星座中的星座点中选择与该位的逻辑值对应的每行的候选，并且计算对数似然比（LLR） 该比特基于该信号和每条线路的选择的候选。

    Method and apparatus for synchronization operation in cellular internet of things networks
    18.
    发明授权
    Method and apparatus for synchronization operation in cellular internet of things networks 有权

    公开(公告)号：US10863460B2

    公开(公告)日：2020-12-08

    申请号：US15458472

    申请日：2017-03-14

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Peng Xue ,  Cheol Jeong ,  Yeohun Yun

    IPC: H04W56/00 ,  H04L5/00 ,  H04W4/70

    Abstract: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A wireless device for receiving signals, a base station for transmitting a master information block (MIB) in a wireless communication network and a method therefore are provided. The wireless device comprises a receiver configured to receive, from a base station, a master information block (MIB) for a first communication using a first frequency bandwidth, and a processor configured to identify a frequency offset between a center frequency of the first frequency bandwidth and a channel raster for a second communication using a second frequency bandwidth based on information in the MIB. The receiver is further configured to receive, from the base station, signals, through the first communication, based on the frequency offset. The first frequency bandwidth is narrower than the second frequency bandwidth.

    Synchronization procedure and resource control method and apparatus for communication in D2D system
    19.
    发明授权
    Synchronization procedure and resource control method and apparatus for communication in D2D system 有权

    公开(公告)号：US10805891B2

    公开(公告)日：2020-10-13

    申请号：US14864009

    申请日：2015-09-24

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Seunghoon Park ,  Hyunseok Ryu ,  Peng Xue ,  Chiwoo Lim ,  Sangwon Choi

    IPC: H04W72/10 ,  H04W56/00 ,  H04W8/00

    Abstract: The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data rate in comparison to the 4G communication system, such as long term evolution (LTE). A method for a terminal to establish synchronization with another terminal in a network supporting device-to-device (D2D) communication is provided. The method includes scanning, at the terminal, for synchronization signals from at least one base station, acquiring, when a synchronization signal is received from a base station, synchronization with the base station based on the synchronization signal, measuring power of the synchronization signal received from the base station, and transmitting, when data to be transmitted are generated in idle mode and the received signal power is less than a received signal power, a synchronization signal as a synchronization relaying terminal.

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