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    • 73. 发明授权
    • Medium access apparatus and method for preventing a plurality of stations in a wireless local area network from colliding with one another
    • 用于防止无线局域网中的多个台站相互碰撞的媒体接入装置和方法
    • US08144653B2
    • 2012-03-27
    • US11599442
    • 2006-11-15
    • Chang-yeul Kwon
    • Chang-yeul Kwon
    • H04W4/00
    • H04W74/08H04B7/0613H04L27/2601H04W48/08H04W74/002H04W74/0816H04W74/0866H04W84/12H04W88/10
    • A method and apparatus for preventing a plurality of stations in a wireless local area network (WLAN) where a plurality of high throughput (HT) stations and a plurality of 802.11 legacy stations coexist from colliding are provided. The method includes generating a data frame having an HT format by inserting information indicating that a medium will be unavailable until the reception of an acknowledgement (ACK) frame is concluded into a physical layer (PHY) header having a format that can be interpreted by both the HT stations and the legacy stations; transmitting the data frame; and transmitting a reset frame which resets network allocation vectors (NAVs) of a plurality of stations which have heard the data frame, and has a format that can be interpreted by both the HT stations and the legacy stations. The apparatus includes a data frame generation unit; a reset frame generation unit; and a transmission unit.
    • 提供了一种用于防止多个高吞吐量(HT)站和多个802.11遗留站与冲突共存的无线局域网(WLAN)中的多个站的方法和装置。 该方法包括通过插入指示介质将不可用的信息来生成具有HT格式的数据帧,直到确认(ACK)帧的接收结束为具有可被两者解释的格式的物理层(PHY)报头 HT站和遗留站; 传输数据帧; 并发送复位帧,其复位已经听到数据帧的多个站的网络分配向量(NAV),并且具有可由HT站和传统站二者解释的格式。 该装置包括:数据帧生成单元; 复位帧生成单元; 和发送单元。
    • 74. 发明授权
    • Method and apparatus preventing plurality of stations in WLAN from colliding with each other when attempting to access medium
    • 当尝试访问媒体时,防止WLAN中的多个站相互碰撞的方法和装置
    • US08023480B2
    • 2011-09-20
    • US11603051
    • 2006-11-22
    • Chang-yeul Kwon
    • Chang-yeul Kwon
    • H04W4/00
    • H04W74/0816H04W28/18H04W74/002H04W74/0825H04W84/12
    • A method and apparatus for preventing a plurality of stations in a wireless local area network (WLAN) from colliding with each other when accessing a medium are provided. In the method, an access point (AP) determines the transmission capabilities of a plurality of stations in a basic service set (BSS) of the AP, determines the format of control frames or data frames which have a high throughput (HT) format to be used in the BSS of the AP, and notifies the stations of the result of the determination. Therefore, it is possible to adaptively choose and use an optimum method of preventing a plurality of stations in a WLAN from colliding with each other when accessing a medium according to the circumstances in a WLAN by referencing the transmission capabilities of a plurality of stations in the WLAN.
    • 提供了一种用于在访问介质时防止无线局域网(WLAN)中的多个站相互碰撞的方法和装置。 在该方法中,接入点(AP)确定AP的基本业务集(BSS)中的多个站的传输能力,确定具有高吞吐量(HT)格式的控制帧或数据帧的格式, 在AP的BSS中使用,并通知站台的确定结果。 因此,通过参照WLAN中的多个站的传输能力,可以自适应地选择和使用防止WLAN中的多个站在根据WLAN的情况访问介质时相互碰撞的最佳方法 WLAN。
    • 75. 发明授权
    • Method of communications between MIMO stations
    • MIMO站之间的通信方法
    • US07489652B2
    • 2009-02-10
    • US11032349
    • 2005-01-11
    • Chang-yeul KwonChil-youl YangTae-kon Kim
    • Chang-yeul KwonChil-youl YangTae-kon Kim
    • H04Q7/00
    • H04W28/22H04B7/0413H04B17/318H04L1/0002H04L1/0025H04W48/08H04W84/12
    • A link adaption method for multi input multi output (MIMO) system having a multi-antenna structure and a communicating method of MIMO stations in a basic service set (BSS), which constitutes a wireless communication network. The communicating method includes receiving from a predetermined MIMO station, the number of MIMO antennas and transmission rates supported by the respective MIMO stations. It further includes, storing one or more channel estimations indicators obtained while receiving various framed form the predetermined MIMO station for each MIMO antenna and for each transmission rate supported by the MIMO antenna, determining the threshold levels of the channel estimation for each MIMO antenna, and comparing the threshold levels with an average of channels estimation indicators for each MIMO antenna. The transmission rate is determined based on the comparison result and the data is then transmitted to the predetermined MIMO station ad the determined transmission rate.
    • 一种用于多输入多输出(MIMO)系统的链路自适应方法,其具有构成无线通信网络的基本服务集(BSS)中的MIMO天线结构和通信方法。 通信方法包括从预定的MIMO站接收MIMO天线的数量和由各个MIMO站支持的传输速率。 其还包括:存储一个或多个信道估计指示,所述信道估计指示符在接收各种成帧格式的每个MIMO天线的预定MIMO站和MIMO天线支持的每个传输速率时获得,确定每个MIMO天线的信道估计的阈值电平,以及 将阈值水平与每个MIMO天线的信道估计指标的平均值进行比较。 基于比较结果确定传输速率,然后将数据发送到所确定的传输速率的预定MIMO站。