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    • 95. 发明授权
    • Cipher device using RC4 algorithm and method thereof
    • 使用RC4算法的密码装置及其方法
    • US07634086B2
    • 2009-12-15
    • US11289181
    • 2005-11-28
    • Yun-Joo KimDoo-Hyun BaeGwan-Yeon KimSe-Hyun ParkSok-Kyu Lee
    • Yun-Joo KimDoo-Hyun BaeGwan-Yeon KimSe-Hyun ParkSok-Kyu Lee
    • H04L9/00
    • H04L63/0435H04L9/065H04L2209/12H04L2209/80
    • An encryption/decryption device and a method thereof use an RC4 algorithm to reduce a waiting time for encryption/decryption thereby avoiding data process delay. The encryption/decryption device includes a management unit, an encryption/decryption unit, and a first interface. The management unit includes a WEP seed key generator for generating a WEP seed key based on a transmitter address of first data and a cipher suite value representing a cipher protocol type for the transmitter address, an RC4 key scheduler for generating S-Box data using the WEP seed key, and an S-Box data memory storing the S-Box data generated from the RC4 key scheduler for the transmitter addresses. The encryption/decryption unit has a core for performing the RC4 algorithm corresponding to the cipher suite, encrypting/decrypting the first data using the S-Box data transmitted from the management unit, and transmitting a signal for generating the S-Box data of second data to the management unit. The first interface transmits a control signal and a data signal between the management unit and the encryption/decryption unit.
    • 加密/解密装置及其方法使用RC4算法来减少加密/解密的等待时间,从而避免数据处理延迟。 加密/解密装置包括管理单元,加密/解密单元和第一接口。 管理单元包括:WEP种子密钥发生器,用于基于第一数据的发射机地址和表示发射机地址的密码协议类型的密码组值产生WEP种子密钥; RC4密钥调度器,用于使用 WEP种子密钥和存储从用于发射机地址的RC4密钥调度器生成的S-Box数据的S-Box数据存储器。 加密/解密单元具有用于执行与加密套件相对应的RC4算法的核心,使用从管理单元发送的S-Box数据对第一数据进行加密/解密,并且发送用于生成第二数据的S-Box数据的信号 数据到管理单位。 第一接口在管理单元和加密/解密单元之间发送控制信号和数据信号。
    • 97. 发明授权
    • Method for transmitting data in multi-user wireless communication system
    • 在多用户无线通信系统中传输数据的方法
    • US09246563B2
    • 2016-01-26
    • US13504925
    • 2010-10-30
    • Yu-Ro LeeJong-Ee OhSok-Kyu Lee
    • Yu-Ro LeeJong-Ee OhSok-Kyu Lee
    • H04W4/00H04B7/04H04L25/02
    • H04B7/0452H04L1/0003H04L1/0009H04L1/0015H04L1/08H04L25/0204
    • The present invention particularly relates to a method and an apparatus for improving the efficiency of data transmission in a multi-user wireless transmission system. According to one embodiment of the present invention, the method, which is a transmission method of data in a multi-user wireless communication system, comprises the steps of: estimating channel states of each terminal through sounding or feedback information received from the terminals, and selecting terminals to which individual data are to be transmitted at the same time; determining a signal to noise ratio of the selected terminals, and calculating a precoding matrix; calculating a modulation and coding scheme (MCS) of each terminal and the number of symbols of data fields in accordance with the MCS of each terminal; dividing an area according to the number of terminals to which the data fields are to be simultaneously transmitted, if there are two or more selected terminals; and recalculating a reception signal to interference and noise ratio (SINR) for each area of each terminal, configuring a packet by resetting the MCS according to the recalculated SINR, and transmitting the configured packet.
    • 本发明特别涉及一种用于提高多用户无线传输系统中的数据传输效率的方法和装置。 根据本发明的一个实施例,作为多用户无线通信系统中的数据的传输方法的方法包括以下步骤:通过从终端接收的探测或反馈信息来估计每个终端的信道状态,以及 选择要同时发送单个数据的终端; 确定所选终端的信噪比,并计算预编码矩阵; 根据每个终端的MCS计算每个终端的调制和编码方案(MCS)和数据字段的符号数; 如果存在两个或更多个所选择的终端,则根据要同时发送数据字段的终端数量划分一个区域; 并重新计算每个终端的每个区域的接收信号与干扰和噪声比(SINR),通过根据重新计算的SINR重新设置MCS来配置分组,并发送配置的分组。
    • 98. 发明授权
    • Method and apparatus for transmitting/receiving packet in wireless communication system
    • 用于在无线通信系统中发送/接收分组的方法和装置
    • US09167476B2
    • 2015-10-20
    • US13047477
    • 2011-03-14
    • Yun-Joo KimSok-Kyu Lee
    • Yun-Joo KimSok-Kyu Lee
    • H04W4/00H04W28/06H04W4/06
    • H04W72/005H04L45/74H04L69/22H04W4/06H04W28/06H04W72/0406
    • A method for simultaneously transmitting packets having different lengths to two or more users in a wireless communication system includes: generating the packets to transmit to the respective users, the packets containing information on the maximum transmission length of the packets having different lengths; and simultaneously transmitting the generated packets to the respective users. The maximum transmission length is represented by the number of symbols, and each of the packets sequentially contains control information required for transmitting the packet, data, a tail field, and a PHY pad field, and is generated by inserting a MAC pad between the control information and the data such that the tail field and the PHY pad field are positioned at the last byte of the last symbol of the maximum transmission length.
    • 一种用于在无线通信系统中同时向两个或多个用户发送具有不同长度的分组的方法包括:生成要发送给各个用户的分组,所述分组包含关于具有不同长度的分组的最大传输长度的信息; 同时将生成的分组发送给各个用户。 最大传输长度由符号数表示,并且每个分组顺序地包含用于发送分组所需的控制信息,数据,尾部字段和PHY填充字段,并且通过在控制器之间插入MAC垫来生成 信息和数据,使得尾部场和PHY垫场位于最大传输长度的最后一个符号的最后一个字节。