公开(公告)号：US20140286455A1

公开(公告)日：2014-09-25

申请号：US14353461

申请日：2012-10-12

Applicant: LG ELECTRONICS INC.

Inventor： Jin Soo Choi ,  Seung Hee Han ,  Jin Sam Kwak ,  Yong Ho Seuk ,  Jeong Ki Kim

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2613 ,  H04L5/0007 ,  H04L5/0048

Abstract: A method of transmitting pilots id disclosed. The method of transmitting pilots includes transmitting pilots over N orthogonal frequency division multiplexing (OFDM) symbols, wherein a pilot at subcarrier k for OFDM symbol n is determined to have time varying characteristic, thereby to prevent the cause of spectral lines.

Abstract translation: 一种发射飞行员的方法。 发送导频的方法包括在N个正交频分复用（OFDM）符号上发送导频，其中确定OFDM符号n的子载波k处的导频具有时变特性，从而防止谱线的原因。

公开(公告)号：US08787492B2

公开(公告)日：2014-07-22

申请号：US13754538

申请日：2013-01-30

Applicant: LG Electronics Inc.

Inventor： Yeong Hyeon Kwon ,  Seung Hee Han ,  Hyun Woo Lee ,  Sung Ho Moon ,  Jin Sam Kwak ,  Dong Cheol Kim ,  Min Seok Noh

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC classification number: H04W72/0406 ,  H04L1/0071 ,  H04L1/08 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0058

Abstract: A symbol mapping method for repetition coding is disclosed. The symbol mapping method comprises performing repetition coding on codeword to output repeated codeword symbols, and mapping the repeated codeword symbols with subcarriers located in different localized resource blocks. According to the embodiments of the present invention, it is possible to obtain maximum reliability in a receiving side by mapping codeword bits with subcarriers to reduce the number of bits having low reliability when a transmitting side uses repetition coding. Also, it is possible to improve decoding throughput and obtain channel diversity.

Abstract translation: 公开了一种用于重复编码的符号映射方法。 符号映射方法包括对码字执行重复编码以输出重复的码字符号，以及将重复的码字符号与位于不同的本地化资源块中的子载波进行映射。 根据本发明的实施例，通过将码字比特与子载波相映射来获得最大的可靠性是有可能的，当发送方使用重复编码时，可以减少具有低可靠性的比特数。 此外，可以提高解码吞吐量并获得信道分集。

公开(公告)号：US20140093082A1

公开(公告)日：2014-04-03

申请号：US14119423

申请日：2012-02-28

Applicant: LG ELECTRONICS INC.

Inventor： In Uk Jung ,  Jin Sam Kwak ,  Ki Seon Ryu ,  Wook Bong Lee

IPC: H04W12/04

CPC classification number: H04W12/04 ,  H04L9/0833 ,  H04L9/0891 ,  H04L63/104 ,  H04W4/70 ,  H04W12/02

Abstract: A method for updating a group traffic key used for encrypting and decrypting multicast data in a wireless communication system is described. The method includes receiving, from the base station, a first message comprising a new group security seed; and updating the group traffic key based on the new group security seed.

Abstract translation: 描述了一种在无线通信系统中更新用于加密和解密组播数据的组业务密钥的方法。 该方法包括从基站接收包括新的组安全种子的第一消息; 并基于新的组安全种子来更新组业务密钥。

公开(公告)号：US20130215997A1

公开(公告)日：2013-08-22

申请号：US13847987

申请日：2013-03-20

Applicant: LG Electronics Inc.

Inventor： Hyun Woo Lee ,  Min Seok Noh ,  Yeong Hyeon Kwon ,  Seung Hee Han ,  Dong Cheol Kim ,  Jin Sam Kwak ,  Dragan Vujcic

IPC: H04L1/00

CPC classification number: H04L1/0023 ,  H04J13/0062 ,  H04J13/0074 ,  H04J13/22 ,  H04L27/2613 ,  H04L27/2657 ,  H04W56/00

Abstract: A method for transmitting a random access preamble to a base station includes generating the random access preamble from a Zadoff-Chu (ZC) sequence having a length N, wherein the random access preamble is generated by considering a cyclic shift of the ZC sequence; and transmitting the random access preamble to the base station, wherein the cyclic shift is given by using a variable M corresponding to a Doppler shift of one subcarrier spacing, and wherein parameters associated with defining the cyclic shift are differently defined based on whether the variable M is less than ⅓ of the length N.

Abstract translation: 用于向基站发送随机接入前导码的方法包括：从具有长度N的Zadoff-Chu（ZC）序列生成随机接入前同步码，其中通过考虑ZC序列的循环移位来生成随机接入前同步码; 以及将所述随机接入前导码发送到所述基站，其中，通过使用与一个子载波间隔的多普勒频移对应的变量M来给出所述循环移位，并且其中与定义所述循环移位相关联的参数基于所述变量M 小于长度N的1/3。