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。

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。

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。

公开(公告)号：US07519035B2

公开(公告)日：2009-04-14

申请号：US11050487

申请日：2005-02-01

申请人： John M. Kowalski ,  Srinivas Kandala

发明人： John M. Kowalski ,  Srinivas Kandala

IPC分类号： H04Q7/24

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。

公开(公告)号：US07272119B2

公开(公告)日：2007-09-18

申请号：US10063756

申请日：2002-05-10

申请人： William Michael Rudnick ,  John M. Kowalski ,  Srinivas Kandala

发明人： William Michael Rudnick ,  John M. Kowalski ,  Srinivas Kandala

IPC分类号： H04Q7/00

CPC分类号： H04W74/06 ,  H04L12/403 ,  H04L47/10 ,  H04L47/13 ,  H04L47/14 ,  H04L47/24 ,  H04W84/18

摘要： Embodiments of the present invention comprise systems and methods for providing transmission priority to stations in a wireless LAN system.

摘要翻译： 本发明的实施例包括用于向无线LAN系统中的站提供传输优先级的系统和方法。

公开(公告)号：US07187668B2

公开(公告)日：2007-03-06

申请号：US09995296

申请日：2001-11-27

申请人： Srinivas Kandala

发明人： Srinivas Kandala

IPC分类号： H04Q7/24 ,  H04L12/26 ,  H04L12/413 ,  H04J3/02

CPC分类号： H04W72/12 ,  H04W72/1252 ,  H04W74/0833

摘要： Devices, softwares and methods advance the scheduling of a next contention session upon premature termination of a contention free session. A Hybrid Coordinator detects when the exchange of wireless transmissions finishes before the contention free window is scheduled to end. Upon such detection, the Hybrid Coordinator transmits a notification to advance the scheduling of the next contention session. Upon sensing the notification, contention resumes by the participating peripherals.

摘要翻译： 设备，软件和方法在提前终止无竞争会话时提前进行下一次争用会话的调度。 混合协调器检测何时交换无线传输在无竞争窗口计划结束之前完成。 在这种检测时，混合协调器发送通知以提前进行下一个争用会话的调度。 感知通知后，参与的外围设备将恢复争用。

公开(公告)号：US07050459B2

公开(公告)日：2006-05-23

申请号：US09823407

申请日：2001-03-30

申请人： Srinivas Kandala

发明人： Srinivas Kandala

IPC分类号： H04J3/22 ,  H04J3/16

CPC分类号： H04W72/1278 ,  H04W84/12

摘要： Devices, softwares and methods for centralized session planning while in a DCF mode. An access point plans centrally a schedule of individual sessions with each station. Then it announces to each peripheral station the onset of the session by a polling pulse that includes the return address of a MAC layer of the station. The addressed peripheral device then transmits data from its MAC layer.

公开(公告)号：US06856795B2

公开(公告)日：2005-02-15

申请号：US10337551

申请日：2003-01-06

申请人： Srinivas Kandala

发明人： Srinivas Kandala

IPC分类号： H04B7/08 ,  H04Q7/00

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。

公开(公告)号：US06208632B1

公开(公告)日：2001-03-27

申请号：US09015424

申请日：1998-01-29

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： H04B7216

CPC分类号： H04W52/42 ,  H04B1/707 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/0851 ,  H04B7/2631 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J3/0602

摘要： A wideband CDMA receiver system to accept messages from asynchronously transmitting base stations is provided. The base station transmission to each receiver includes a perch channel and at least one traffic channel. Although all the channels typically include pilot symbols for the purpose of demodulating the information symbols of the channel, the pilot channel includes a higher proportion of pilot symbols to information symbols. Therefore, a perch channel based timing and estimation system is inherently more accurate. In addition, the perch channel is generally transmitted at higher power levels than a traffic channel, and the resulting, higher, signal to noise ratio signal also improves the accuracy of the timing and channel estimation. Based on the timing derived from the perch channel of a first base station, the receiver can set the timing of the traffic channel transmissions from a second base station, to more closely match the timing of traffic channel transmissions from the first base station. In this manner, the signal to noise ratio of the demodulated traffic channel information symbols is enhanced through the diversity of using the transmissions of two base stations. A method for receiving wideband CDMA transmissions from asynchronously transmitting base stations is also provided.

摘要翻译： 提供了一种用于接受来自异步发送基站的消息的宽带CDMA接收机系统。 到每个接收机的基站传输包括导频信道和至少一个业务信道。 虽然所有信道通常包括用于解调信道的信息符号的导频符号，但是导频信道包括较高比例的导频符号到信息符号。 因此，基于导频信道的定时和估计系统本质上更准确。 此外，导频信道通常以比业务信道更高的功率电平发送，并且所得到的更高的信噪比信号也提高了定时和信道估计的精度。 基于从第一基站的导频信道导出的定时，接收机可以设置来自第二基站的业务信道传输的定时，以更紧密地匹配来自第一基站的业务信道传输的定时。 以这种方式，通过使用两个基站的传输的分集来增强解调业务信道信息符号的信噪比。 还提供了用于从异步发送基站接收宽带CDMA传输的方法。

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。