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1. 发明授权

US07274707B2 Coexistence of stations capable of different modulation schemes in a wireless local area network 失效
标题翻译：在无线局域网中能够具有不同调制方案的站的共存
公开(公告)号：US07274707B2
公开(公告)日：2007-09-25
申请号：US10278288
申请日：2002-10-23
申请人： Sunghyun Choi , Olaf Hirsch , Atul Garg , Javier del Prado Pavon
发明人： Sunghyun Choi , Olaf Hirsch , Atul Garg , Javier del Prado Pavon
IPC分类号： H04L12/413
CPC分类号： H04W74/02 , H04W84/12
摘要： A local-area network is provided where a plurality of OFDM stations and DSSS/CCK-only stations coexist. A beacon signal having a contention-free-period (CFP) is transmitted from an access point to the plurality of stations. The OFDM-modulated data is transmitted to the plurality of stations before the CFP ends, and after the CFP period ends, the DSSS/CCK-modulated data is transmitted, thereby preventing collisions between the stations.
摘要翻译：提供了一个局域网，其中多个OFDM站和仅DSSS /仅CCK站共存。具有无争用周期（CFP）的信标信号从接入点发送到多个站。在CFP结束之前，OFDM调制数据被发送到多个站，在CFP周期结束之后，发送DSSS / CCK调制数据，从而防止站点之间的冲突。

2. 发明授权

US07120092B2 System and method for performing clock synchronization of nodes connected via a wireless local area network 有权
公开(公告)号：US07120092B2
公开(公告)日：2006-10-10
申请号：US10289758
申请日：2002-11-07
申请人： Javier del Prado Pavon , Sai Shankar Nandagopalan , Sunghyun Choi , Takashi Sato , Jeff Bennet
发明人： Javier del Prado Pavon , Sai Shankar Nandagopalan , Sunghyun Choi , Takashi Sato , Jeff Bennet
IPC分类号： G04C11/00 , H04J3/06 , H04L7/00
CPC分类号： H04J3/0655
摘要： A clock synchronization method and apparatus is disclosed for use in a communication system including a plurality of wireless nodes communicatively coupled via a wireless network, each of the plurality of wireless nodes having a local time base, and one of the plurality of wireless nodes being designated as a master node having a master time base which serves as a master clock against which the local time bases are synchronized. The clock synchronization method includes the steps of periodically transmitting synchronization frames to the plurality of non-master nodes so as to adjust the slave clocks associated with the respective non-master nodes. The synchronization frames are distributed from the master node at near-periodic intervals and includes a cycle time value that corresponds to the end of the previously transmitted synchronization frame. The slave clocks (i.e., non-master nodes) receiving the synchronization frame determine the cycle time value at the point of reception of the synchronization frame and adjusts their clocks by calculating a difference value between the received cycle time and a previously saved local cycle time value.

3. 发明授权

US07756090B2 System and method for performing fast channel switching in a wireless medium 有权
标题翻译：用于在无线介质中执行快速通道切换的系统和方法
公开(公告)号：US07756090B2
公开(公告)日：2010-07-13
申请号：US10261889
申请日：2002-09-30
申请人： Javier del Prado Pavon , Amjad Soomro , Sunghyun Choi
发明人： Javier del Prado Pavon , Amjad Soomro , Sunghyun Choi
IPC分类号： H04W4/00
CPC分类号： H04W74/0875 , H04W24/00
摘要： The present invention relates to a method for performing fast channel switching in a wireless local area network (WLAN). The method generally includes the steps of: determining that the wireless medium has been idle during a PCF interframe space (PIFS) period, transmitting a first management frame during a slot time following the PIFS period; wherein the transmission at said slot time substantially guarantees priority access said wireless medium; and performing fast channel switching in the network in accordance with directives contained within the management frame. Fast channel switching as defined herein includes one of quieting the current channel and/or switching from a current channel of operation to a new channel of operation. The method overcomes the latencies associated with contention based services, such as the DCF service. The method may further include the additional step of transmitting one or more additional management frames, whose format is identical to said first management frame, each additional frame preferably separated by the PIFS interframe space to provide a higher degree of transmission reliability. The method is preferably performed at an access point (AP) in an infrastructure network or in an STA in an ad-hoc network.
摘要翻译：本发明涉及一种在无线局域网（WLAN）中执行快速信道切换的方法。该方法通常包括以下步骤：在PCF帧间间隔（PIFS）期间确定无线介质已经空闲，在PIFS周期之后的时隙时间期间发送第一管理帧; 其中所述时隙时间的传输基本上保证优先接入所述无线介质; 以及根据包含在管理帧内的指令在网络中执行快速信道切换。如本文所定义的快速通道切换包括将当前通道静音和/或从当前操作通道切换到新的操作通道之一。该方法克服了与基于竞争的服务相关联的延迟，例如DCF服务。该方法还可以包括附加步骤，其发送一个或多个其格式与所述第一管理帧相同的附加管理帧，每个附加帧优选由PIFS帧间间隔分隔，以提供更高程度的传输可靠性。该方法优选地在基础设施网络中的接入点（AP）或自组织网络中的STA中执行。

4. 发明授权

US07245592B2 Aligning 802.11e HCF and 802.11h TPC operations 有权
标题翻译：对齐802.11e HCF和802.11h TPC操作
公开(公告)号：US07245592B2
公开(公告)日：2007-07-17
申请号：US10119577
申请日：2002-04-10
申请人： Amjad Soomro , Sunghyun Choi , Javier del Prado Pavon
发明人： Amjad Soomro , Sunghyun Choi , Javier del Prado Pavon
IPC分类号： G08C17/00
CPC分类号： H04W52/367 , H04W84/12 , H04W92/18
摘要： A granted TxOP holder transmits the first frame of a QSTA-to-QSTA communication at a power level sufficient to ensure correct reception by the destination and at least detection by the HC, and then, with exceptions, transmits subsequent frames at a power level merely sufficient to ensure correct reception by the destination, regardless of reception or detection by the HC. Subsequent frames that must be received by the HC, such as those changing the TC queue size or requesting extension of the current TxOP, are transmitted at a power sufficient to ensure reception by the HC as well as the destination, as are the last frame(s). The HC is constrained from reclaiming the channel unconditionally merely because of failure to detect activity, and recovery is limited to the TxOP holder.
摘要翻译：授权的TxOP持有者以足以确保目的地的正确接收和至少由HC进行的检测的功率水平发送QSTA至QSTA通信的第一帧，然后例如仅在功率级别发送后续帧足以确保目的地的正确接收，不管HC接收或检测。必须由HC接收的后续帧，例如改变TC队列大小或请求扩展当前TxOP的后续帧，以足以确保HC以及目的地的接收的功率发送，如同最后一帧（ s）。 HC被限制在无条件地回收信道，仅因为无法检测到活动，并且恢复仅限于TxOP持有者。

5. 发明授权

US07236502B2 Internal signaling method to support clock synchronization of nodes connected via a wireless local area network 有权
标题翻译：用于支持通过无线局域网连接的节点的时钟同步的内部信令方法
公开(公告)号：US07236502B2
公开(公告)日：2007-06-26
申请号：US10319871
申请日：2002-12-13
申请人： Javier Del Prado Pavon , Sunghyun Choi
发明人： Javier Del Prado Pavon , Sunghyun Choi
IPC分类号： H04J3/06
CPC分类号： H04J3/0652
摘要： This invention discloses a set of internal signaling (i.e., management primitives) to support a clock-synchronization protocol for wirelessly synchronizing clock registers of wired or wireless nodes via a wireless local area network (i.e., 802.11 network). The clock synchronization is performed between two higher-layer protocol entities residing within two different wireless stations (STAs).
摘要翻译：本发明公开了一组内部信号（即，管理原语），以支持用于通过无线局域网（即802.11网络）无线同步有线或无线节点的时钟寄存器的时钟同步协议。在驻留在两个不同无线站（STA）中的两个高层协议实体之间执行时钟同步。

6. 发明申请

US20060056296A1 System and method for using a scheduler based on virtual frames 审中-公开
标题翻译：基于虚拟帧使用调度器的系统和方法
公开(公告)号：US20060056296A1
公开(公告)日：2006-03-16
申请号：US10537594
申请日：2003-12-03
申请人： Sai Nandagopalan , Sunghyun Choi , Atul Garg
发明人： Sai Nandagopalan , Sunghyun Choi , Atul Garg
IPC分类号： H04L12/26
CPC分类号： H04W72/1236 , H04W28/24 , H04W72/12 , H04W74/06
摘要： Disclosed is a method and system based on virtual frames for enabling a QAP to seamlessly operate between granting polls for upstream and sidestream traffic while sending downstream frames. A key feature of the scheduling method of the invention is that the scheduling method generates virtual frames to create transmission opportunity durations for granting polls for the upstream and sidestream traffic.
摘要翻译：公开了一种基于虚拟帧的方法和系统，用于使QAP能够在发送下游帧的同时为上游和侧流业务轮询提供无缝操作。本发明的调度方法的一个关键特征在于，调度方法生成虚拟帧，以创建用于为上游和侧流业务进行轮询的发送机会持续时间。

7. 发明授权

US07471667B2 Coexistence of modulation schemes in a WLAN 有权
标题翻译：调制方案在WLAN中的共存
公开(公告)号：US07471667B2
公开(公告)日：2008-12-30
申请号：US10080156
申请日：2002-02-19
申请人： Olaf Hirsch , Atul Kumar Garg , Sunghyun Choi , Abraham Jan de Bart , Paul Gruijters
发明人： Olaf Hirsch , Atul Kumar Garg , Sunghyun Choi , Abraham Jan de Bart , Paul Gruijters
IPC分类号： H04L12/413 , H04Q7/20
CPC分类号： H04W74/02 , H04L5/023 , H04L5/1453 , H04L27/0008 , H04L27/2602 , H04W84/12 , H04W88/08
摘要： A local area network is provided where an OFDM station and DSSS/CCK station coexist. During a contention-free period both stations operate under the point coordination function rules as defined in the IEEE 802.11 specification. Both stations transmit data when polled by the access point. The contention-free period comprises a sub-contention period during which only the OFDM station communicate. During the sub-contention period the OFDM station operates under the distributed coordination function while the DSSS/CCK station waits to be polled by the access point before starting to communicate.
摘要翻译：提供了一个局域网，其中OFDM站和DSSS / CCK站共存。在无竞争期间，两个站都按照IEEE 802.11规范中定义的点协调功能规则运行。两个站点在接入点轮询时都会发送数据。无竞争时段包括只有OFDM站进行通信的次争用期。在子争用期间，OFDM站在分布式协调功能下运行，而DSSS / CCK站在开始通信之前等待接入点轮询。

8. 发明授权

US09414402B2 Method of communication based on controlling receive chain in wireless local area network and apparatus for the same 有权
标题翻译：基于在无线局域网中控制接收链的通信方法及其设备
公开(公告)号：US09414402B2
公开(公告)日：2016-08-09
申请号：US14000185
申请日：2012-02-09
申请人： Ill Soo Sohn , Sunghyun Choi , Seungmin Yoo , Hyewon Lee , Munhwan Choi , Yong Ho Seok , Okhwan Lee
发明人： Ill Soo Sohn , Sunghyun Choi , Seungmin Yoo , Hyewon Lee , Munhwan Choi , Yong Ho Seok , Okhwan Lee
IPC分类号： H04W4/00 , H04W72/12 , H04B7/08 , H04L1/06 , H04B7/04 , H04W84/12
CPC分类号： H04W72/1263 , H04B7/0452 , H04B7/0877 , H04L1/06 , H04W84/12
摘要： A method of communication based on a receive chain control, performed by a receiver, in a wireless local area network is provided. The method includes: receiving a frame from a transmitter, the frame indicating a multi receive chain operation, activating at least one receive chain, each receive chain processing a received signal transmitted through each spatial stream, and receiving at least one data field from the transmitter through the at least one activated receive chain.
摘要翻译：提供了一种基于由无线局域网中的接收机执行的接收链控制的通信方法。该方法包括：从发射机接收帧，指示多接收链操作的帧，激活至少一个接收链，每个接收链处理通过每个空间流发送的接收信号，以及从发射机接收至少一个数据场通过至少一个激活的接收链。

9. 发明申请

US20140098701A1 METHOD AND DEVICE FOR CHANNEL MEASUREMENT IN A WIRELESS LAN SYSTEM 有权
标题翻译：无线LAN系统中信道测量的方法和装置
公开(公告)号：US20140098701A1
公开(公告)日：2014-04-10
申请号：US14124584
申请日：2012-06-01
申请人： Ill Soo Sohn , Sunghyun Choi , Seung Min Yoo , Hyewon Lee , Mun Hwan Choi , Yong Ho Seok , Ok Hwan Lee
发明人： Ill Soo Sohn , Sunghyun Choi , Seung Min Yoo , Hyewon Lee , Mun Hwan Choi , Yong Ho Seok , Ok Hwan Lee
IPC分类号： H04W24/08
CPC分类号： H04W24/08 , H04B7/0452 , H04B7/0617 , H04B7/0634 , H04B7/065
摘要： The present invention relates to a method and device for channel measurement in a wireless LAN system. A station (STA) receives a plurality of sounding frames from an access point (AP), estimates the plurality of sounding frames in order to generate long-term channel state information (LCSI), provides the generated LCSI to the AP as feedback, and receives from the AP a group identifier (ID) management frame comprising information on a group ID determined on the basis of the LCSI.
摘要翻译：本发明涉及无线LAN系统中的信道测量方法和装置。站点（STA）从接入点（AP）接收多个探测帧，估计多个探测帧以产生长期信道状态信息（LCSI），将生成的LCSI作为反馈提供给AP，以及从AP接收包括基于LCSI确定的组ID的信息的组标识符（ID）管理帧。

10. 发明授权

US08194635B2 Apparatus and method for uplink scheduling considering characteristic of power amplifier in mobile communication terminal 有权
标题翻译：考虑移动通信终端中功率放大器的特性的上行链路调度的装置和方法
公开(公告)号：US08194635B2
公开(公告)日：2012-06-05
申请号：US12148964
申请日：2008-04-23
申请人： Sunghyun Choi , Kwang-Hun Han , Young-Kyu Choi , Yong-Hwan Lee
发明人： Sunghyun Choi , Kwang-Hun Han , Young-Kyu Choi , Yong-Hwan Lee
IPC分类号： H04J3/00
CPC分类号： H04W72/1268 , H04W52/146 , H04W52/228
摘要： An UpLink (UL) scheduling method and apparatus considering a characteristic of a power amplifier in a mobile communication terminal are provided. The UL scheduling method includes calculating a packet transmission time, which minimizes energy consumed in packet transmission, by using a Direct Current (DC) voltage used in a power amplifier for signal amplification and by using nonlinear amplification efficiency; and scheduling UL data by using the calculated packet transmission time.
摘要翻译：提供了考虑移动通信终端中的功率放大器的特性的UpLink（UL）调度方法和装置。 UL调度方法包括通过使用用于信号放大的功率放大器中使用的直流（DC）电压和通过使用非线性放大效率来计算分组传输中消耗的能量最小化的分组传输时间; 并通过使用所计算的分组传输时间调度UL数据。

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