公开(公告)号：WO03028302A3

公开(公告)日：2003-09-04

申请号：PCT/US0230012

申请日：2002-09-19

Applicant: ATHEROS COMM INC

Inventor： MCFARLAND WILLIAM ,  DAVIDSON ANDREW M ,  NG TAO FEI SAMUEL

IPC: H04L1/00 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04B7/005 ,  H04Q7/38

CPC classification number: H04L1/1829 ,  H04L1/0002 ,  H04L47/10 ,  H04L47/14 ,  H04L47/26 ,  H04L47/323 ,  H04W28/22 ,  H04W52/0219 ,  H04W52/0261 ,  H04W80/00 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/22

Abstract: Systems and methods to adapt the rate at which acknowledgements are transmitted between nodes in a wireless communication system are presented. The systems and methods enable an acknowledgement based wireless communication system to extend its range and capacity by adapting a rate at which acknowledgement packets are transmitted between nodes to match the available transmit power of the acknowledge transmitting node and the propagation environment of the wireless communication system.

Abstract translation: 介绍了用于调整在无线通信系统中的节点之间传送确认的速率的系统和方法。 该系统和方法使得基于确认的无线通信系统能够通过调整在节点之间传送确认分组的速率以匹配确认传送节点的可用传送功率和无线通信系统的传播环境来扩展其范围和容量。

公开(公告)号：WO0223853A9

公开(公告)日：2003-04-03

申请号：PCT/US0128705

申请日：2001-09-14

Applicant: ATHEROS COMM INC

Inventor： KUSKIN JEFFREY SCOTT ,  NG TAO-FEI SAMUEL ,  DAVIDSON ANDREW M

IPC: H04L29/06 ,  H04L12/28

CPC classification number: H04L63/162

Abstract: A Hardware MAC (Media Access Control) unit implements time-critical functions according the 802.11 standard for telecommunications, thereby enhancing system performance. The MAC layer includes three sub-layers: MLME (MAC Sublayer Management Entity), which connects the MAC unit with the host CPU, FTM (Frame Transition Manager), which connects the MAC unit with the network, and FLPM (Frame Level Protocol Manager), which internally connects the MLME sub-layer with the FTM sub-layer. In particular, the FLPM manager includes time-critical and non-time-critical functions that are customarily implemented in software on the MAC by a MAC CPU (Central Processing Unit). The hardware MAC implements time-critical FLPM functions in hardware on the MAC and implements non-time-critical FLPM functions in software on the host CPU so that requirements for processing software on the MAC preferably may be altogether eliminated or alternatively may be substantially reduced.

Abstract translation: 硬件MAC（媒体访问控制）单元根据802.11电信标准执行时间关键功能，从而提高系统性能。 MAC层包括三个子层：将MAC单元与主机CPU连接的MLME（MAC子层管理实体），将MAC单元与网络连接的FTM（帧过渡管理器）和FLPM（帧级协议管理器 ），其内部连接MLME子层与FTM子层。 特别地，FLPM管理器包括通过MAC CPU（中央处理单元）在MAC上的软件中通常实现的时间关键和非时间关键功能。 硬件MAC在MAC上的硬件中实现时间关键的FLPM功能，并且在主机CPU上的软件中实现非时间关键的FLPM功能，所以优选地，可以完全消除对MAC上的处理软件的要求，或者可以大大减少。

公开(公告)号：WO0223867A3

公开(公告)日：2003-01-16

申请号：PCT/US0128696

申请日：2001-09-14

Applicant: ATHEROS COMM INC

Inventor： KUSKIN JEFFREY SCOTT ,  NG TAO-FEI SAMUEL ,  DHAMDHERE DEEPAK PRABHAKAR ,  CAIN FIONA J ,  DAVIDSON ANDREW M

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12

CPC classification number: H04L63/0428 ,  H04L1/1829 ,  H04L29/06 ,  H04L29/12783 ,  H04L61/35 ,  H04L63/062 ,  H04L63/164 ,  H04L69/12 ,  H04W8/26 ,  H04W12/02 ,  H04W12/04 ,  H04W84/12

Abstract: A key-caching system retrieves actively used keys from a relatively fast cache memory for fast processing of wireless communications. Additional keys are stored in relatively slow system memory that has high storage capacity. As keys become needed for active use, the keys are retrieve from the system memory and stored in the cache memory. By using active memory for keys actively being used, system performance is enhanced. By using system memory for keys not being used, a greater number of keys are available for transfer to the cache and subsequent active use.

Abstract translation: 密钥缓存系统从相对较快的高速缓冲存储器中检索主动使用的密钥，用于无线通信的快速处理。 附加键存储在具有高存储容量的相对较慢的系统存储器中。 随着密钥变得需要主动使用，密钥从系统存储器中检索并存储在高速缓冲存储器中。 通过使用主动使用的主动内存，可以提高系统性能。 通过对未使用的密钥使用系统内存，可以使用更多数量的密钥来传输到缓存和随后的主动使用。

公开(公告)号：WO0182543A3

公开(公告)日：2002-02-28

申请号：PCT/US0112866

申请日：2001-04-20

Applicant: ATHEROS COMM INC

Inventor： MCFARLAND WILLIAM

IPC: H04L27/26

CPC classification number: H04W28/0231 ,  H04L1/0002 ,  H04L1/0017 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L25/0224 ,  H04L25/08 ,  H04L27/2602 ,  H04L27/2608 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2628

Abstract: A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clocking frequency of the nodes' iFFT and FFT processors, as well as their serializers and deserializers. The nodes have several ways of dynamically changing the number of carriers used. The selection of symbol rate and number of carriers can be optimized for a given channel based on explicit channel measurements, a priori knowledge of the channel, or past experience. Provision is made for accommodating legacy nodes that may have constraints in symbol rate or the number of carriers they can support. The receiver can determine the correct symbol rate and number of carriers through a priori knowledge, a first exchange of packets in a base mode that all nodes can understand, or an indication in the header of the data packet which is transmitted in a base mode of operation that all nodes can understand.

Abstract translation: 诸如OFDM或DMT系统的多载波通信系统具有被允许动态地改变其接收和发送符号率的节点以及它们的信号内的载波数量。 通过改变节点iFFT和FFT处理器的时钟频率，以及它们的串行器和解串器来改变符号速率。 节点具有动态地改变所使用的载波数量的几种方式。 可以基于明确的信道测量，信道的先验知识或过去的经验，针对给定信道优化符号速率和载波数量的选择。 规定了用于容纳可能具有符号率限制或可支持的运营商数量的传统节点。 接收机可以通过先验知识确定正确的符号速率和载波数，以所有节点可以理解的基本模式的分组的第一次交换，或以基本模式发送的数据分组的报头中的指示 所有节点都可以理解的操作。

公开(公告)号：WO0128150A3

公开(公告)日：2001-09-27

申请号：PCT/US0041164

申请日：2000-10-11

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H ,  SU DAVID ,  SARGARI MASOUD

IPC: H04L7/00 ,  H03J7/04 ,  H04L27/00 ,  H04L27/233 ,  H04J3/06

CPC classification number: H04L27/148 ,  H03J7/04 ,  H04B1/38 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0022

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

Abstract translation: 本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间的频率偏移的影响。 在本发明中，提供了用于在传输期间校正载波频率和采样频率的方法，包括这种方法的数字和模拟实现。 接收器确定发射器和接收器之间的相对频率偏移，并且当接收器将其数据传输到返回路径中的原始发射器时使用该信息来校正该偏移，使得原始发射器接收到的信号处于采样中并且 载波频率锁定与原始发射机的本地频率参考。

公开(公告)号：WO2005046113A3

公开(公告)日：2007-02-22

申请号：PCT/US2004036886

申请日：2004-11-04

Applicant: ATHEROS COMM INC ,  SUN QINFANG ,  CHOI WON-JOON ,  GILBERT JEFFREY M ,  TEHRANI ARDAVAN MALEKI

Inventor： SUN QINFANG ,  CHOI WON-JOON ,  GILBERT JEFFREY M ,  TEHRANI ARDAVAN MALEKI

IPC: H04B7/02 ,  H04L20060101 ,  H04L1/02 ,  H04L27/28 ,  H04Q7/00

CPC classification number: H04B7/0421 ,  H04B7/0413 ,  H04B7/0613 ,  H04B7/0684 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0061 ,  H04L1/06 ,  H04L1/0656 ,  H04L1/1819 ,  H04L1/1829 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/0014 ,  H04L2025/03426

Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may "stomp" on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.

Abstract translation: 多输入多输出（MIMO）系统可以同时在多个天线上进行发射并同时在多个天线上进行接收。 不幸的是，由于遗留802.11a / g设备不能解码多个数据流，所以这样的传统设备可能在MIMO分组的传输完成之前通过发送在MIMO分组上“踩踏”。 因此，本文提供MIMO系统和方法，以允许传统设备对MIMO分组的长度进行解码并且在该时间段内抑制发射。 这些MIMO系统和方法被优化用于MIMO分组的有效传输。

公开(公告)号：WO2005109842B1

公开(公告)日：2006-08-03

申请号：PCT/US2004029667

申请日：2004-09-13

Applicant: ATHEROS COMM INC ,  LI SHEUNG L

Inventor： LI SHEUNG L

IPC: H04B1/38 ,  H04L12/56 ,  H04M1/00 ,  H04M3/00 ,  H04W52/02

CPC classification number: H04W52/0229 ,  H04W52/0235 ,  Y02D70/00 ,  Y02D70/142

Abstract: A method and apparatus to wirelessly control network devices is described. In one embodiment, a wireless device is used to control at least one host device using a network. In one aspect, a wireless device receives and determines a response to network control signals received thereto. In another aspect, a wireless device controls a host sleep sequence to allow a network to remotely power a host device between an active and passive state. In one aspect, a wireless device provides one or more network identification responses to signals received from the network In another aspect, a network provides an alert to a third party such as a network administrator if the network determines a wireless device is absent from the network due to a loss of signal therefrom.

Abstract translation: 描述了一种无线控制网络设备的方法和装置。 在一个实施例中，使用无线设备来使用网络来控制至少一个主机设备。 在一个方面，无线设备接收并确定对其接收的网络控制信号的响应。 在另一方面，无线设备控制主机睡眠序列以允许网络在主动和被动状态之间远程为主机设备供电。 在一个方面，无线设备向从网络接收的信号提供一个或多个网络标识响应。另一方面，如果网络确定网络中不存在无线设备，则网络向诸如网络管理员的第三方提供警报 由于信号的丢失。

公开(公告)号：WO2006076697A2

公开(公告)日：2006-07-20

申请号：PCT/US2006001452

申请日：2006-01-12

Applicant: ATHEROS COMM INC ,  YE HUANCHUN ,  CHOI WON-JOON ,  ZHANG NING ,  GILBERT JEFFREY M

Inventor： YE HUANCHUN ,  CHOI WON-JOON ,  ZHANG NING ,  GILBERT JEFFREY M

CPC classification number: H04L27/2608 ,  H04B7/02 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0016 ,  H04L1/0025 ,  H04L1/20

Abstract: An accurate total error rate performance can be measured using a computed error vector magnitude (EVM) per stream. Using this EVM, the receiver or the transmitter can advantageously generate an optimized modulation and coding scheme (MCS) that corresponds to a specific number of streams, modulation and coding rate for the transmitter. For example, the receiver can compute an SNR from the EVM and then use an SNR vs. MCS table to determine the optimized MCS. In contrast, the transmitter can receive an EVM-to-RSSI mapping and an EVM- to-MCS mapping from the receiver. These mappings and an EVM can facilitate selecting the optimized MCS.

Abstract translation: 可以使用每个流的计算误差向量幅度（EVM）来测量精确的总错误率性能。 使用该EVM，接收机或发射机可以有利地生成对应于发射机的特定数量的流，调制和编码速率的优化的调制和编码方案（MCS）。 例如，接收机可以从EVM计算SNR，然后使用SNR对MCS表来确定优化的MCS。 相比之下，发射机可以从接收机接收EVM到RSSI映射和EVM到MCS映射。 这些映射和EVM可以促进选择优化的MCS。

公开(公告)号：WO2006019501A2

公开(公告)日：2006-02-23

申请号：PCT/US2005021999

申请日：2005-06-24

Applicant: ATHEROS COMM INC ,  KUSKIN JEFFREY

Inventor： KUSKIN JEFFREY

IPC: H04J3/24 ,  H04W28/06

CPC classification number: H04W28/06 ,  H04L1/0083

Abstract: To efficiently transmit data on a wireless network, small packets that might otherwise be sent individually are aggregated into a "superframe". This superframe can then be transmitted as a single, larger packet. To form this superframe, a plurality of tagged data packets can be aggregated into a packed aggregation block (PAB). Encapsulation data, e.g. protocol information, can be appended to the PAB. Wireless transmission information can bound the PAB and encapsulation data. Forming the superframe can be performed using an efficient combination of hardware and software. In one embodiment, aggregation of the tagged data packets can be performed by hardware without regard to the underlying protocol(s). Software can then provide protocol-handling support.

Abstract translation: 为了在无线网络上高效地传输数据，可能会单独发送的小数据包会聚合为“超帧”。 然后这个超帧可以作为单个更大的数据包传输。 为了形成这个超帧，可以将多个标记数据分组聚合到打包聚合块（PAB）中。 封装数据，例如 协议信息，可以附加到PAB。 无线传输信息可以绑定PAB和封装数据。 形成超帧可以使用硬件和软件的高效组合来执行。 在一个实施例中，标记数据分组的聚合可以由硬件执行而不考虑底层协议。 软件可以提供协议处理支持。

公开(公告)号：WO2004075443A3

公开(公告)日：2005-10-06

申请号：PCT/US2004003462

申请日：2004-02-06

Applicant: ATHEROS COMM INC ,  HUSTED PAUL J ,  NG TAO-FEI SAMUEL

Inventor： HUSTED PAUL J ,  NG TAO-FEI SAMUEL

IPC: H04L7/02 ,  H04L25/05 ,  H04L27/00 ,  H03M7/00

CPC classification number: H04L7/0029 ,  H04L25/05 ,  H04L27/0008

Abstract: In a wireless local area network (WLAN), receiving or transmitting signals having multiple modulation schemes can require the use of multiple clock rates. Providing these multiple clock rates significantly increases silicon area and power consumption, both of which are highly undesirably in a wireless device. A sequencing interpolator can advantageously reduce the number of clock rates by receiving signals at a first rate and outputting signals at a second rate. The sequencing interpolator can include a multiplexer network that selectively determines which coefficients are applied to certain signals. Coefficients are chosen to ensure that an error in a frequency domain is within a given tolerance. The multiplexer network can be controlled by a counter value. At a predetermined count, the interpolated output signal is discarded and the counter is reset.

Abstract translation: 在无线局域网（WLAN）中，具有多个调制方案的接收或发送信号可能需要使用多个时钟速率。 提供这些多个时钟速率显着增加了硅面积和功耗，这两者在无线设备中都是非常不希望的。 排序插值器可以有利地通过以第一速率接收信号并以第二速率输出信号来减少时钟速率的数量。 排序插值器可以包括多路复用器网络，其选择性地确定哪些系数被应用于某些信号。 选择系数以确保频域中的误差在给定的容限内。 复用器网络可以通过计数器值来控制。 在预定的计数时，内插的输出信号被丢弃并且计数器被复位。