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1. 发明授权

US07239626B2 System clock synchronization in an ad hoc and infrastructure wireless networks 失效
标题翻译：在自组织和基础设施无线网络中的系统时钟同步
公开(公告)号：US07239626B2
公开(公告)日：2007-07-03
申请号：US10882918
申请日：2004-06-30
申请人： Srinivas Kandala , John Michael Kowalski , Richard Thomas Bennett
发明人： Srinivas Kandala , John Michael Kowalski , Richard Thomas Bennett
IPC分类号： H04Q7/24
CPC分类号： H04W56/001 , H04B1/7183 , H04J3/0664 , H04J3/067 , H04J3/0676 , H04N21/4305 , H04W84/18
摘要： A method of synchronizing clocks in the stations of ad hoc and infrastructure networks includes providing a time stamp field in a header; reading the header by all stations in a network; extracting the time stamp information from the header by each station in the network as time information; sending extracted time information to a station clock; and adjusting the station clock as a function of the extracted time information. A system for synchronizing clocks in the stations of ad hoc and infrastructure networks includes a DLL having a comparator for receiving the time stamp information and a low-pass filter having a long time-constant for adjusting the station clock in a gradual manner; a time stamp field in a header; and time information extracted from the time stamp information of the header by each station in the network.
摘要翻译：在同步和基础设施网络的站中同步时钟的方法包括：在报头中提供时间标记字段; 在网络中读取所有站点的标题; 从网络中的每个站的头部提取时间戳信息作为时间信息; 将提取的时间信息发送到站时钟; 以及根据提取的时间信息调整站时钟。用于同步自组织和基础设施网络的站中的时钟的系统包括具有用于接收时间戳信息的比较器的DLL和具有用于逐渐调整站时钟的长时间常数的低通滤波器; 标题中的时间戳字段; 以及从网络中的每个站从标题的时间戳信息中提取的时间信息。

2. 发明授权

US07957331B2 Power saving wireless local area network portable device 有权
标题翻译：省电无线局域网便携式设备
公开(公告)号：US07957331B2
公开(公告)日：2011-06-07
申请号：US12170281
申请日：2008-07-09
申请人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
发明人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
IPC分类号： H04J3/00 , H04W4/00
CPC分类号： H04W74/06 , H04W24/00 , H04W52/0216 , H04W52/287 , H04W52/50 , H04W74/002 , H04W84/12 , Y02D70/142
摘要： A system and method are provided for controlling bandwidth allocation in a wireless local area network (wLAN). The method comprises: expressing device bandwidth allocations in terms of a time base; in response to expressing the bandwidth allocation in terms of a time base, monitoring network communications; and, measuring the allocated bandwidths. The method may further comprise: establishing polling schedules in response to expressing the bandwidth allocation in terms of a time base; and, de-energizing devices in response to the polling schedules. Expressing device bandwidth allocations in terms of a time base includes establishing: an inter-transmission opportunity (TXOP) interval; and, a TXOP jitter. These fields are supplied in the IEEE 802.11e transmit specification (TSPEC). Then, de-energizing devices in response to the polling schedule includes disengaging transmission and receiving functions in the minimum TXOP intervals between polling events, where the minimum TXOP interval is the inter-TXOP interval minus the TXOP jitter.
摘要翻译：提供了一种用于控制无线局域网（wLAN）中的带宽分配的系统和方法。该方法包括：以时基表示设备带宽分配; 响应于以时基表示带宽分配，监视网络通信; 并测量分配的带宽。该方法还可以包括：响应于以时基表示带宽分配来建立轮询时间表; 并且响应于轮询时间表而使装置断电。表示基于时基的设备带宽分配包括建立：传输间机会（TXOP）间隔; 和TXOP抖动。这些字段以IEEE 802.11e发送规范（TSPEC）提供。然后，响应于轮询时间表去激活装置包括在轮询事件之间的最小TXOP间隔中分离发送和接收功能，其中最小TXOP间隔是TXOP间隔减去TXOP抖动。

3. 发明授权

US07372855B2 System and method for synchronizing an IEEE 802.11 power-save interval 有权
标题翻译：用于同步IEEE 802.11省电间隔的系统和方法
公开(公告)号：US07372855B2
公开(公告)日：2008-05-13
申请号：US10648084
申请日：2003-08-26
申请人： Srinivas Kandala
发明人： Srinivas Kandala
IPC分类号： H04L12/28
CPC分类号： H04W52/0216 , H04L1/16 , H04L1/1685 , H04W84/12 , H04W88/08 , Y02D70/142 , Y02D70/23
摘要： A system and method are provided for coordinating a power-save interval in an IEEE 802.11 wireless network. The method transmits a first frame from an access point (AP) to a quality of service station (QSTA) and receives an acknowledgement from the QSTA. In response to receiving the acknowledgement, the first frame is retransmitted from the AP to the QSTA and the retransmitted first frame is identified as the last frame in the transmission queue. An acknowledgement is received responsive to the retransmitted first frame and the next minimum service interval is timed in response to the retransmitted first frame.
摘要翻译：提供了一种用于协调IEEE 802.11无线网络中的省电间隔的系统和方法。该方法将第一帧从接入点（AP）发送到服务质量站（QSTA），并从QSTA接收确认。响应于接收到确认，将第一帧从AP重传到QSTA，并且重发的第一帧被识别为传输队列中的最后一帧。响应于重传的第一帧接收确认，并且响应于重传的第一帧对下一个最小服务间隔进行定时。

4. 发明申请

US20050185613A1 Method to negotiate consumed power versus medium occupancy time in MIMO based WLAN systems using admission control 有权
标题翻译：在使用准入控制的基于MIMO的WLAN系统中协商消耗功率与中等占用时间的方法
公开(公告)号：US20050185613A1
公开(公告)日：2005-08-25
申请号：US11050487
申请日：2005-02-01
申请人： John Kowalski , Srinivas Kandala
发明人： John Kowalski , Srinivas Kandala
IPC分类号： H04L12/28 , H04W28/18 , H04W28/26 , H04W40/00 , H04W52/02 , H04W74/02 , H04W74/06 , H04W74/08 , H04W76/02 , H04W76/06 , H04W84/12 , H04Q7/00
CPC分类号： H04W40/00 , H04B7/0413 , H04B7/0689 , H04W52/0206 , H04W74/02 , H04W84/12 , Y02D70/142 , Y02D70/444
摘要： A method of selectively providing MIMO transmission/reception in a WLAN system includes using a TSPEC reservation and signaling mechanism to instantiate and tear down, dynamically, multi-channel operation in a WLAN; providing an inference algorithm to determine the minimum number of channels required to establish a TSPEC using a MIMO WLAN system; providing specific channel parameters as parameters to be negotiated in the TSPEC; providing frame exchange sequences to be used in Enhanced Distributed Coordinated Access contention based access and to be used in polled access; and providing a mechanism wherein an access point makes a decision as to whether to admit MIMO functionality on a given link, wherein a “link” is a set of communications between two specific WLAN stations.
摘要翻译：在WLAN系统中选择性地提供MIMO发送/接收的方法包括使用TSPEC预留和信令机制来实时和拆除WLAN中的多信道操作; 提供推理算法来确定使用MIMO WLAN系统建立TSPEC所需的最小信道数量; 提供特定的信道参数作为在TSPEC中协商的参数; 提供要用于基于增强型分布式协调访问竞争的访问中并用于轮询访问的帧交换序列; 以及提供一种机制，其中接入点决定是否允许给定链路上的MIMO功能，其中“链路”是两个特定WLAN站之间的一组通信。

5. 发明申请

US20090252143A1 METHODS AND APPARATUS FOR DELAYED BLOCK ACKNOWLEDGEMENT IN A WIRELESS LOCAL AREA NETWORK (WLAN) 有权
标题翻译：在无线局域网（WLAN）中延迟块确认的方法和装置
公开(公告)号：US20090252143A1
公开(公告)日：2009-10-08
申请号：US12277770
申请日：2008-11-25
申请人： Vinay Sridhara , Sanjiv Nanda , Srinivas Kandala
发明人： Vinay Sridhara , Sanjiv Nanda , Srinivas Kandala
IPC分类号： H04J3/00
CPC分类号： H04L1/1685 , H04L1/1635 , H04L1/1854 , H04L1/1887 , H04L2001/0093
摘要： Methods and apparatus for delayed block acknowledgments in a WLAN. In an aspect, a method is provided for communication with one or more nodes. The method includes transmitting to the one or more nodes a block comprising data and a first bit indicating no acknowledgements for the data are to be transmitted from the one or more nodes. The method also includes determining whether a selected time location within a transmit time duration has been reached, wherein if the selected time location has been reached, transmitting to the one or more nodes a second bit indicating that the one or more nodes are to transmit one or more acknowledgements, respectively, for the data. The method also includes receiving at least one acknowledgment for the data within a remaining portion of the transmit time duration.
摘要翻译： WLAN中延迟块确认的方法和装置。在一方面，提供了一种用于与一个或多个节点进行通信的方法。该方法包括向一个或多个节点发送包含数据的块，并且从一个或多个节点发送指示不对数据进行确认的第一比特。该方法还包括确定是否已经达到发送持续时间内的所选择的时间位置，其中如果已经到达所选择的时间位置，则向一个或多个节点发送指示一个或多个节点要发送一个的第二比特或更多的确认数据。该方法还包括在传输持续时间的剩余部分内接收数据的至少一个确认。

6. 发明申请

US20080291858A1 Power Saving Wireless Local Area Network Portable Device 有权
标题翻译：节能无线局域网便携式设备
公开(公告)号：US20080291858A1
公开(公告)日：2008-11-27
申请号：US12170281
申请日：2008-07-09
申请人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
发明人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
IPC分类号： G08C17/02
CPC分类号： H04W74/06 , H04W24/00 , H04W52/0216 , H04W52/287 , H04W52/50 , H04W74/002 , H04W84/12 , Y02D70/142
摘要： A system and method are provided for controlling bandwidth allocation in a wireless local area network (wLAN). The method comprises: expressing device bandwidth allocations in terms of a time base; in response to expressing the bandwidth allocation in terms of a time base, monitoring network communications; and, measuring the allocated bandwidths. The method may further comprise: establishing polling schedules in response to expressing the bandwidth allocation in terms of a time base; and, de-energizing devices in response to the polling schedules. Expressing device bandwidth allocations in terms of a time base includes establishing: an inter-transmission opportunity (TXOP) interval; and, a TXOP jitter. These fields are supplied in the IEEE 802.11e transmit specification (TSPEC). Then, de-energizing devices in response to the polling schedule includes disengaging transmission and receiving functions in the minimum TXOP intervals between polling events, where the minimum TXOP interval is the inter-TXOP interval minus the TXOP jitter.
摘要翻译：提供了一种用于控制无线局域网（wLAN）中的带宽分配的系统和方法。该方法包括：以时基表示设备带宽分配; 响应于以时基表示带宽分配，监视网络通信; 并测量分配的带宽。该方法还可以包括：响应于以时基表示带宽分配来建立轮询时间表; 并且响应于轮询时间表而使装置断电。表示基于时基的设备带宽分配包括建立：传输间机会（TXOP）间隔; 和TXOP抖动。这些字段以IEEE 802.11e发送规范（TSPEC）提供。然后，响应于轮询时间表去激活装置包括在轮询事件之间的最小TXOP间隔中分离发送和接收功能，其中最小TXOP间隔是TXOP间隔减去TXOP抖动。

7. 发明授权

US07414969B2 System and method for IEEE 802.11 network admission control 有权
标题翻译： IEEE 802.11网络准入控制系统和方法
公开(公告)号：US07414969B2
公开(公告)日：2008-08-19
申请号：US10685648
申请日：2003-10-15
申请人： Srinivas Kandala
发明人： Srinivas Kandala
IPC分类号： H04L12/26
CPC分类号： H04L47/762 , H04L47/14 , H04L47/15 , H04L47/50 , H04L47/525 , H04L47/626 , H04L47/70 , H04L47/788 , H04L47/805 , H04L47/824 , H04L47/826 , H04W28/20 , H04W74/0891 , H04W84/12
摘要： A system and method are provided for periodic stream admission control in an IEEE 802.11 network. The method comprises: at an access point (AP), receiving a transmit specification, including a requested bandwidth, from a quality of service station (QSTA); computing Ttemp, the time equivalent to the requested bandwidth; computing Tall, the time already allocated; and, computing Tres, the total time available. IfTtemp+Tall Tres, the QSTA is not admitted. Some aspects of the method further comprise: monitoring the bandwidth of the admitted QSTA. In another aspect, the method: determines the bandwidth required by the admitted QSTA; and, modifies the bandwidth of the admitted QSTA in response to the determined QSTA requirements. In one aspect, the method: monitors channel conditions; and, modifies the bandwidth of the admitted QSTA in response to the channel conditions.
摘要翻译：提供了一种用于IEEE 802.11网络中的周期性流接纳控制的系统和方法。该方法包括：在接入点（AP）处，从服务质量站（QSTA）接收包括请求的带宽的发送规范; 计算T＆lt; temp＆gt;等于所请求带宽的时间; 计算T _{全部，已经分配的时间; 并且计算总可用时间。所有，则允许QSTA。如果T T _{，则不接受QSTA。该方法的一些方面还包括：监视被允许的QSTA的带宽。另一方面，该方法：确定被允许的QSTA所需的带宽; 并且根据所确定的QSTA要求来修改被允许的QSTA的带宽。一方面，该方法：监控渠道状况; 并且响应于信道条件来修改被允许的QSTA的带宽。}}

8. 发明授权

US06977972B1 Method of hybrid soft/hard decision demodulation of signals with multilevel modulation 失效
标题翻译：多电平调制信号混合软/硬判决解调方法
公开(公告)号：US06977972B1
公开(公告)日：2005-12-20
申请号：US09614784
申请日：2000-07-12
申请人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
发明人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
IPC分类号： H04L25/06 , H04L27/00 , H04L27/22
CPC分类号： H04L25/067
摘要： The performance of forward error correction decoders for digital communication systems can be improved if soft information relating the reliability of the value representing the demodulated signal is provided to the decoder with a value for the signal. On the other hand, soft information increases the quantity of information that must be processed, increasing the cost and complexity of the decoder.
摘要翻译：如果将与表示解调信号的值的可靠性相关联的软信息以信号的值提供给解码器，则可以提高数字通信系统的前向纠错解码器的性能。另一方面，软信息增加了必须处理的信息量，增加了解码器的成本和复杂性。

9. 发明授权

US06505037B1 Data unit detection including antenna diversity 有权
标题翻译：数据单元检测包括天线分集
公开(公告)号：US06505037B1
公开(公告)日：2003-01-07
申请号：US09510907
申请日：2000-02-23
申请人： Srinivas Kandala
发明人： Srinivas Kandala
IPC分类号： H04Q700
CPC分类号： H04B7/0808
摘要： A system adjusts a receiving device in response to sensing symbols. An automatic gain control is adjusted in response receiving a first symbol of a data unit from a first antenna. After adjusting the automatic gain control at least a second and a third symbol of the data unit are received, and in response thereto (1) a first energy of at least one of the second and third symbols is calculated, (2) a first frequency offset of at least one of the second and third symbols is calculated, and (3) a first temporal offset of at least one of the second and third symbols is calculated. The automatic gain control in response receiving a fourth symbol of the data unit from a second antenna is received. After adjusting the automatic gain control at least a fifth and a sixth symbol of the data unit is calculated, and in response thereto (1) a second energy of at least one of the fifth and sixth symbols is calculated, (2) a second frequency offset of at least one of the fifth and sixth symbols is calculated, and (3) a second temporal offset of at least one of the fifth and sixth symbols is calculated. At least one of the first and second antenna is selected based upon a comparison between the first and second energy. In this manner, antenna diversity selection may be performed within a limited duration of available symbols.
摘要翻译：系统响应感测符号调整接收设备。响应于从第一天线接收数据单元的第一符号来调整自动增益控制。在调整了自动增益控制之后，接收到数据单元的至少第二和第三符号，并且响应于此（1）计算第二和第三符号中的至少一个符号的第一能量，（2）第一频率计算第二和第三符号中的至少一个符号的偏移量，并且（3）计算第二和第三符号中的至少一个的第一时间偏移。响应于从第二天线接收数据单元的第四符号的自动增益控制被接收。在调整了自动增益控制之后，计算数据单元的至少第五和第六符号，并且响应于（1）计算第五和第六符号中的至少一个符号的第二能量，（2）第二频率计算第五和第六符号中的至少一个符号的偏移量，并且（3）计算第五和第六符号中的至少一个的第二时间偏移。基于第一和第二能量之间的比较来选择第一和第二天线中的至少一个。以这种方式，可以在可用符号的有限持续时间内执行天线分集选择。

10. 发明授权

US06085104A Pilot aided, time-varying finite impulse response, adaptive channel matching receiving system and method 失效
标题翻译：导频辅助，时变有限脉冲响应，自适应信道匹配接收系统和方法
公开(公告)号：US06085104A
公开(公告)日：2000-07-04
申请号：US48240
申请日：1998-03-25
申请人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
发明人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
IPC分类号： H04B1/7115 , H04B1/712 , H04B7/08 , H04B15/00
CPC分类号： H04B1/7115 , H04B7/0845 , H04B7/0891 , H04B1/712
摘要： A wideband receiver, including a time-varying finite impulse response (FIR) filter, has been provided to combine multipath communications of data in response to pilot channel timing information. The time-varying FIR processes the multipath communications through independent signal paths. Each signal path includes a variable delay circuit and a variable gain circuit. The delay of each separate signal path is adjusted and made equal in response to the pilot channel timing information. Likewise, the gain of each signal path is adjusted in response to pilot channel gain information to maximize the signal to noise ratio of the combined signal paths. The separate signal paths are then summed in a combiner circuit. The time-varying FIR permits the data communication to be summed either before, or after demodulation. A method of combining multipath communications using a time-varying FIR is also provided.
摘要翻译：已经提供了包括时变有限脉冲响应（FIR）滤波器的宽带接收机，以响应于导频信道定时信息来组合数据的多路径通信。时变FIR通过独立的信号路径处理多路径通信。每个信号路径包括可变延迟电路和可变增益电路。每个单独的信号路径的延迟被调整并且响应于导频信道定时信息使其相等。类似地，响应于导频信道增益信息调整每个信号路径的增益，以最大化组合信号路径的信噪比。然后将单独的信号路径在组合器电路中相加。时变FIR允许在解调之前或之后将数据通信相加。还提供了使用时变FIR组合多路径通信的方法。

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