公开(公告)号：US20080247442A1

公开(公告)日：2008-10-09

申请号：US11995996

申请日：2005-07-18

申请人： Philip V. Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

发明人： Philip V. Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

IPC分类号： H04B1/69

CPC分类号： H04L1/006 ,  H04B1/7172 ,  H04L1/005

摘要： A method, apparatus, and system for modulating and demodulating signals compatible with multiple receiver types and designed for improved receiver performance. The invention includes the use of hybrid impulse radio (H-IR) ultra-wideband (UWB) with forward error correction coding, recursive modulation and other techniques designed to enable one transmitter to transmit a waveform capable of being demodulated concurrently by a coherent receiver, a differentially coherent receiver, and/or a non-coherent receiver.

摘要翻译： 一种用于调制和解调与多种接收机类型兼容的信号并被设计用于改善接收机性能的方法，装置和系统。 本发明包括使用具有前向纠错编码，递归调制和其他技术的混合脉冲无线电（H-IR）超宽带（UWB），其被设计成使一个发射机能够通过相干接收机同时发送能够被解调的波形， 差分相干接收机和/或非相干接收机。

公开(公告)号：US07391802B2

公开(公告)日：2008-06-24

申请号：US11074168

申请日：2005-03-07

申请人： Philip Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

发明人： Philip Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

IPC分类号： H04B1/00

CPC分类号： H04B1/7176 ,  H04B1/71635 ,  H04B1/719 ,  H04B2001/6908 ,  H04L27/18 ,  H04L27/2071 ,  H04L27/2331

摘要： A system incorporates time-hopped impulse radio (TH-IR) and transmitted-reference impulse radio (TR-IR) transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a previous modulated bit, and a difference in phase between the reference waveform and the data waveform pair depend on the current bit. A symbol period for the current bit is partitioned into multiple time intervals, and the reference waveform and the data waveform are encoded in a selected one of the time intervals that depends on the current bit.

摘要翻译： 系统在同一无线网络中集成了时间跳跃脉冲无线电（TH-IR）和发射参考脉冲无线电（TR-IR）收发器。 发射机通过为每个当前比特生成参考波形和波形对的数据波形来调制无线通信网络中的比特序列。 参考波形的相位取决于先前的调制位，参考波形和数据波形对之间的相位差取决于当前位。 当前位的符号周期被划分成多个时间间隔，并且参考波形和数据波形被编码在取决于当前位的时间间隔中的所选择的一个中。

公开(公告)号：US20100067379A1

公开(公告)日：2010-03-18

申请号：US12210917

申请日：2008-09-15

申请人： Shiwei Zhao ,  Matthew S. Gast

发明人： Shiwei Zhao ,  Matthew S. Gast

IPC分类号： H04L12/24

CPC分类号： H04W28/16 ,  H04L41/147 ,  H04W24/00 ,  H04W84/12

摘要： A novel technique involves evaluating a real-time environment of a channel based on a nonlinear function of the number of neighbor radios and channel utilization requirements. The technique can be used to pick a channel for an AP that is added to a wireless network or to tune a channel for an existing AP. The technique can be applied to, for example, a relatively new wideband option in the 802.11n standard.

摘要翻译： 一种新颖的技术包括基于相邻无线电数量和信道利用要求的非线性函数来评估信道的实时环境。 该技术可用于为添加到无线网络的AP或为现有AP调整频道的AP选择频道。 该技术可以应用于例如802.11n标准中相对较新的宽带选项。

公开(公告)号：US20130089036A1

公开(公告)日：2013-04-11

申请号：US13269823

申请日：2011-10-10

申请人： James S. Cho ,  Shiwei Zhao

发明人： James S. Cho ,  Shiwei Zhao

IPC分类号： H04L12/413 ,  H04W72/04

CPC分类号： H04W74/085

摘要： Method for reducing collisions between a first station and a second station in a CSMA/CA system. The method may be performed by the first station. Medium access to transmit to the second station may be obtained according to a first procedure for obtaining medium access. It may be determined that the second station is configured to grant transmit opportunity to the first station. Medium access to transmit to the second station may be obtained according to a second procedure for obtaining medium access based on determining that the second station is configured to grant transmit opportunity to the first station. The first procedure may include contending for medium access, while the second procedure may include delaying contention for medium access relative to the first procedure.

摘要翻译： 一种用于减少CSMA / CA系统中的第一站和第二站之间的冲突的方法。 该方法可以由第一站执行。 可以根据用于获得媒体访问的第一过程来获得向第二站发送的媒体访问。 可以确定第二站被配置为向第一站授予发送机会。 基于确定第二站被配置为向第一站授予发送机会，可以根据用于获得媒体接入的第二过程来获得向第二站发送的媒体接入。 第一过程可以包括竞争媒体访问，而第二过程可以包括延迟相对于第一过程的媒体访问的争用。

公开(公告)号：US20120063335A1

公开(公告)日：2012-03-15

申请号：US12957077

申请日：2010-11-30

申请人： James S. Cho ,  Youhan Kim ,  Ning Zhang ,  Shiwei Zhao

发明人： James S. Cho ,  Youhan Kim ,  Ning Zhang ,  Shiwei Zhao

IPC分类号： H04W60/00 ,  H04W24/00 ,  H04W4/06

CPC分类号： H04W52/0206 ,  H04W8/186 ,  H04W52/0229 ,  H04W60/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/22

摘要： A network coordinator can assign an association identifier (AID) and/or a group identifier (GID) to identify a client station to which a packet is to be transmitted and to enable the client station to determine whether to receive an incoming packet. The network coordinator can randomly generate a base AID that is representative of the network coordinator and can assign at least one AID to client stations to minimize the probability of client stations associated with proximate network coordinators being assigned the same AIDs. The network coordinator can also randomly assign at least one GID to a group of client stations to minimize the probability of groups of client stations associated with the proximate network coordinators being assigned the same GID. The client station can analyze indications of a received AID and/or received GID to determine whether to receive the packet or whether to switch to an inactive power state.

摘要翻译： 网络协调器可以分配关联标识符（AID）和/或组标识符（GID）来标识要向其发送分组的客户端站，并使客户端站能够确定是否接收输入分组。 网络协调器可以随机生成代表网络协调器的基本AID，并且可以向客户站分配至少一个AID以最小化与被分配相同AID的邻近网络协调器相关联的客户站的概率。 网络协调器还可以随机地向一组客户端站分配至少一个GID，以最小化与被分配相同GID的邻近网络协调器相关联的客户端站组的概率。 客户端站可以分析所接收的AID和/或接收到的GID的指示，以确定是接收分组还是切换到无效功率状态。

公开(公告)号：US08553605B2

公开(公告)日：2013-10-08

申请号：US12957077

申请日：2010-11-30

申请人： James S. Cho ,  Youhan Kim ,  Ning Zhang ,  Shiwei Zhao

发明人： James S. Cho ,  Youhan Kim ,  Ning Zhang ,  Shiwei Zhao

IPC分类号： H04H20/71

CPC分类号： H04W52/0206 ,  H04W8/186 ,  H04W52/0229 ,  H04W60/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/22

摘要： A network coordinator can assign an association identifier (AID) and/or a group identifier (GID) to identify a client station to which a packet is to be transmitted and to enable the client station to determine whether to receive an incoming packet. The network coordinator can randomly generate a base AID that is representative of the network coordinator and can assign at least one AID to client stations to minimize the probability of client stations associated with proximate network coordinators being assigned the same AIDs. The network coordinator can also randomly assign at least one GID to a group of client stations to minimize the probability of groups of client stations associated with the proximate network coordinators being assigned the same GID. The client station can analyze indications of a received AID and/or received GID to determine whether to receive the packet or whether to switch to an inactive power state.

摘要翻译： 网络协调器可以分配关联标识符（AID）和/或组标识符（GID）来标识要向其发送分组的客户端站，并使客户端站能够确定是否接收输入分组。 网络协调器可以随机生成代表网络协调器的基本AID，并且可以向客户站分配至少一个AID以最小化与被分配相同AID的邻近网络协调器相关联的客户站的概率。 网络协调器还可以随机地向一组客户端站分配至少一个GID，以最小化与被分配相同GID的邻近网络协调器相关联的客户端站组的概率。 客户端站可以分析所接收的AID和/或接收到的GID的指示，以确定是接收分组还是切换到无效功率状态。

公开(公告)号：US08238298B2

公开(公告)日：2012-08-07

申请号：US12210917

申请日：2008-09-15

申请人： Shiwei Zhao ,  Matthew S. Gast

发明人： Shiwei Zhao ,  Matthew S. Gast

IPC分类号： H04W4/00 ,  H04W72/00 ,  H04B7/00

CPC分类号： H04W28/16 ,  H04L41/147 ,  H04W24/00 ,  H04W84/12

摘要： A novel technique involves evaluating a real-time environment of a channel based on a nonlinear function of the number of neighbor radios and channel utilization requirements. The technique can be used to pick a channel for an AP that is added to a wireless network or to tune a channel for an existing AP. The technique can be applied to, for example, a relatively new wideband option in the 802.11n standard.

摘要翻译： 一种新颖的技术包括基于相邻无线电数量和信道利用要求的非线性函数来评估信道的实时环境。 该技术可用于为添加到无线网络的AP或为现有AP调整频道的AP选择频道。 该技术可以应用于例如802.11n标准中相对较新的宽带选项。

公开(公告)号：US20060083294A1

公开(公告)日：2006-04-20

申请号：US11074168

申请日：2005-03-07

申请人： Philip Orlik ,  Andreas Molisch ,  Shiwei Zhao

发明人： Philip Orlik ,  Andreas Molisch ,  Shiwei Zhao

IPC分类号： H04B1/707 ,  H03K9/04

CPC分类号： H04B1/7176 ,  H04B1/71635 ,  H04B1/719 ,  H04B2001/6908 ,  H04L27/18 ,  H04L27/2071 ,  H04L27/2331

摘要： A system incorporates TH-IR and TR-IR transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a previous modulated bit, and a difference in phase between the reference waveform and the data waveform pair depend on the current bit. A symbol period for the current bit is partitioned into multiple time intervals, and the reference waveform and the data waveform are encoded in a selected one of the time intervals that depends on the current bit.

摘要翻译： 一个系统在同一无线网络中集成了TH-IR和TR-IR收发器。 发射机通过为每个当前比特生成参考波形和波形对的数据波形来调制无线通信网络中的比特序列。 参考波形的相位取决于先前的调制位，参考波形和数据波形对之间的相位差取决于当前位。 当前位的符号周期被划分成多个时间间隔，并且参考波形和数据波形被编码在取决于当前位的时间间隔中的所选择的一个中。

公开(公告)号：US08958461B2

公开(公告)日：2015-02-17

申请号：US13219797

申请日：2011-08-29

申请人： James S. Cho ,  Shiwei Zhao

发明人： James S. Cho ,  Shiwei Zhao

IPC分类号： H04B1/38 ,  H04L1/16 ,  H04W28/22 ,  H04W84/12

CPC分类号： H04W52/18 ,  H04L1/1671 ,  H04L1/1874 ,  H04L43/065 ,  H04L47/14 ,  H04L47/30 ,  H04W28/02 ,  H04W28/22 ,  H04W52/38 ,  H04W84/12

摘要： System and method for improving channel efficiency in a wireless link between an access-point transceiver and a first transceiver. The first transceiver may have a first data throughput rate that is lower than the maximum possible data throughput rate of the wireless link. The first transceiver may include a first receive buffer. An indication of the first data throughput rate and a size of the first receive buffer may be received and stored by the access-point transceiver. A first size of a first data packet for transmission to the first transceiver may be determined by the access-point transceiver based on one or more of the first data throughput rate and/or the size of the first receive buffer. The first data packet of the first size may be transmitted to the first transceiver by the access-point transceiver at a data rate that is higher than the first data throughput rate.

摘要翻译： 用于提高接入点收发器和第一收发器之间的无线链路中的信道效率的系统和方法。 第一收发器可以具有低于无线链路的最大可能数据吞吐速率的第一数据吞吐率。 第一收发器可以包括第一接收缓冲器。 可以由接入点收发器接收并存储第一数据吞吐率的指示和第一接收缓冲器的大小。 用于传输到第一收发器的第一数据分组的第一大小可以由接入点收发机基于第一数据吞吐率和/或第一接收缓冲器的大小中的一个或多个来确定。 第一大小的第一数据分组可以以高于第一数据吞吐率的数据速率由接入点收发器发送到第一收发器。

公开(公告)号：US08743808B2

公开(公告)日：2014-06-03

申请号：US13269823

申请日：2011-10-10

申请人： James S. Cho ,  Shiwei Zhao

发明人： James S. Cho ,  Shiwei Zhao

IPC分类号： H04W4/00

CPC分类号： H04W74/085

摘要： Method for reducing collisions between a first station and a second station in a CSMA/CA system. The method may be performed by the first station. Medium access to transmit to the second station may be obtained according to a first procedure for obtaining medium access. It may be determined that the second station is configured to grant transmit opportunity to the first station. Medium access to transmit to the second station may be obtained according to a second procedure for obtaining medium access based on determining that the second station is configured to grant transmit opportunity to the first station. The first procedure may include contending for medium access, while the second procedure may include delaying contention for medium access relative to the first procedure.

摘要翻译： 一种用于减少CSMA / CA系统中的第一站和第二站之间的冲突的方法。 该方法可以由第一站执行。 可以根据用于获得媒体访问的第一过程来获得向第二站发送的媒体访问。 可以确定第二站被配置为向第一站授予发送机会。 基于确定第二站被配置为向第一站授予发送机会，可以根据用于获得媒体接入的第二过程来获得向第二站发送的媒体接入。 第一过程可以包括竞争媒体访问，而第二过程可以包括延迟相对于第一过程的媒体访问的争用。