-
公开(公告)号：US08432876B2
公开(公告)日：2013-04-30
申请号：US12402813
申请日：2009-03-12
CPC分类号： H04W72/0446 , H04W68/00 , H04W72/0406 , H04W74/04 , H04W76/10
摘要： A control channel supporting traffic control in epochs is divided into two control subchannels each being less than or equal to about a half epoch in duration and occurring serially in time. Slot allocation data may be transmitted and received independently over the subchannels. One subchannel may be used for transmitting forward slot allocation data and the other subchannel may be used for transmitting reverse slot allocation data. The channel split into two subchannels may be a paging channel. The forward and reverse slot allocation data may be transmitted between a base station processor and field unit. Forward and reverse traffic data may be staggered by at least about half an epoch. Transmission of traffic data happens within about two epochs after the assignments.
-
公开(公告)号：US07512102B2
公开(公告)日：2009-03-31
申请号：US10350308
申请日：2003-01-22
IPC分类号： H04B7/212
CPC分类号： H04W72/0446 , H04W68/00 , H04W72/0406 , H04W74/04 , H04W76/10
摘要： A control channel supporting traffic control in epochs is divided into two control subchannels each being less than or equal to about a half epoch in duration and occurring serially in time. Slot allocation data may be transmitted and received independently over the subchannels. One subchannel may be used for transmitting forward slot allocation data and the other subchannel may be used for transmitting reverse slot allocation data. The channel split into two subchannels may be a paging channel. The forward and reverse slot allocation data may be transmitted between a base station processor and field unit. Forward and reverse traffic data may be staggered by at least about half an epoch. Transmission of traffic data happens within about two epochs after the assignments.
摘要翻译： 支持时代中的交通控制的控制信道被分成两个控制子信道，每个控制子信道的持续时间小于或等于约一半的时期，并且以时间顺序发生。 时隙分配数据可以通过子信道独立发送和接收。 一个子信道可以用于发送前向时隙分配数据，而另一个子信道可以用于发送反向时隙分配数据。 分成两个子信道的信道可以是寻呼信道。 前向和反向时隙分配数据可以在基站处理器和现场单元之间传输。 正向和反向交通数据可以交错至少约一半的时期。 交通数据的传输发生在分配后大约两个时期。
-
公开(公告)号：US08320298B2
公开(公告)日：2012-11-27
申请号：US10350309
申请日：2003-01-22
IPC分类号： H04B7/212
CPC分类号： H04W72/0446 , H04W28/06 , H04W28/20 , H04W28/24 , H04W48/12 , H04W72/042
摘要： Parallel demodulators are provided in field units. Forward and reverse channel allocation information may be broadcast to the field units in the same epoch as traffic data but on first and second channels, such as paging and traffic channels. This assures that all field units are able to receive forward and reverse channel allocation information every epoch. By having parallel demodulators in the field unit, switching between the first and second channels is avoided and channel allocation information is not lost.
摘要翻译： 并行解调器以现场单位提供。 正向和反向信道分配信息可以在与业务数据相同的时间段中广播到场单元，而是在诸如寻呼和业务信道的第一和第二信道上广播。 这确保所有现场单元能够每个时期接收正向和反向信道分配信息。 通过在场单元中具有并行解调器，避免了第一和第二信道之间的切换，并且信道分配信息不会丢失。
-
公开(公告)号：US20090225718A1
公开(公告)日：2009-09-10
申请号：US12402813
申请日：2009-03-12
IPC分类号： H04W72/00
CPC分类号： H04W72/0446 , H04W68/00 , H04W72/0406 , H04W74/04 , H04W76/10
摘要： A control channel supporting traffic control in epochs is divided into two control subchannels each being less than or equal to about a half epoch in duration and occurring serially in time. Slot allocation data may be transmitted and received independently over the subchannels. One subchannel may be used for transmitting forward slot allocation data and the other subchannel may be used for transmitting reverse slot allocation data. The channel split into two subchannels may be a paging channel. The forward and reverse slot allocation data may be transmitted between a base station processor and field unit. Forward and reverse traffic data may be staggered by at least about half an epoch. Transmission of traffic data happens within about two epochs after the assignments.
摘要翻译： 支持时代中的交通控制的控制信道被分成两个控制子信道，每个控制子信道的持续时间小于或等于约一半的时期，并且以时间顺序发生。 时隙分配数据可以通过子信道独立发送和接收。 一个子信道可以用于发送前向时隙分配数据，而另一个子信道可以用于发送反向时隙分配数据。 分成两个子信道的信道可以是寻呼信道。 前向和反向时隙分配数据可以在基站处理器和现场单元之间传输。 正向和反向交通数据可以交错至少约一半的时期。 交通数据的传输发生在分配后大约两个时期。
-
公开(公告)号：US07587173B2
公开(公告)日：2009-09-08
申请号：US10870719
申请日：2004-06-17
摘要： A method for operating an access point in a wireless local area network is provided, wherein the access point includes a directional antenna for communicating with at least one remote station. The method includes communicating with a selected remote station using a current angle of the directional antenna, and scanning an alternate angle from a plurality of alternate angles of the directional antenna for communicating with the selected remote station. Respective signals received via the current angle and the alternate angle from the selected remote station are measured. The current angle or the alternate angle is selected as a preferred angle based upon the measured signals for continuing communications with the selected remote station.
摘要翻译： 提供了一种用于在无线局域网中操作接入点的方法，其中所述接入点包括用于与至少一个远程站进行通信的定向天线。 该方法包括使用定向天线的当前角度与所选择的远程站进行通信，并且从定向天线的多个交替角度扫描交替角度以与所选择的远程站进行通信。 测量经由当前角度接收的相应信号和来自所选远程站的交替角度。 基于用于与所选择的远程站的连续通信的测量信号，将当前角度或交替角度选择为优选角度。
-
公开(公告)号：US07061427B2
公开(公告)日：2006-06-13
申请号：US10675583
申请日：2003-09-30
IPC分类号： H04B7/00
CPC分类号： H01Q21/005 , H01Q1/1257 , H01Q1/2291
摘要： A technique for steering a directional antenna such as may be used in a Wireless Local Area Network (WLAN) device. The technique detects signal parameters during reception of short sync pulses in the very beginning portion of a Packet Protocol Data Unit (PPDU) frame. As a result, the antenna can be steered to an optimum direction for reception prior to receiving other portions of a preamble that may be needed to acquire carrier signal phase and frequency.
摘要翻译： 一种用于在无线局域网（WLAN）设备中使用的用于转向定向天线的技术。 该技术在分组协议数据单元（PPDU）帧的最初部分接收短同步脉冲期间检测信号参数。 结果，在接收可能需要获得载波信号相位和频率的前导码的其他部分之前，可以将天线转向最佳方向进行接收。
-
公开(公告)号：US08462689B2
公开(公告)日：2013-06-11
申请号：US11022353
申请日：2004-12-22
CPC分类号： H04L1/0045 , H04L1/004 , H04L1/0041 , H04L2001/0093 , H04W28/06 , H04W72/0413 , H04W72/0446 , H04W74/004 , H04W74/006
摘要： A technique for a time division multiplex system in which access to shared broadcast communication media is granted on a demand basis. Particular connections are assigned slot times at the transmitter based on demand. However, no specific information regarding the assignment of time slots need be communicated to the receivers. The transmit side employs a forward error correction technique followed by multiplication by a cover sequence unique to each connection. All receivers listen to the broadcast transmission channel all of the time. The receiver assigned to each connection decodes the signals in such a manner that only the receiver with the correct cover sequence assigned to a particular connection will successfully decode the data associated with that connection. Data frames that fail the forward error correction process are discarded, and only those frames which are successfully decoded are passed up to a higher layer. The occurrence of an erroneously received frame is not necessarily always reported to the transmit side of the connection; only a packet level error indication is made. In this way, information containing time slot assignment need not be communicated between the transmitter and receiver, and yet data will be correctly received.
-
公开(公告)号：US07103386B2
公开(公告)日：2006-09-05
申请号：US10870702
申请日：2004-06-17
IPC分类号： H04M1/00
CPC分类号： H04W16/28 , H04B7/0608 , H04B7/0617 , H04B7/0695 , H04B7/0811 , H04B7/088 , H04W74/08
摘要： A method for operating an access point in a wireless local area network (WLAN) is provided. The access point includes a directional antenna for communicating with a plurality of remote stations, and the directional antenna includes a plurality of antenna patterns. The method includes creating an antenna database by associating between the access point and each remote station a respective measured signal quality corresponding to the plurality of antenna patterns. The respective measured signal qualities are determined by the access point based upon communications with each remote station. The method further includes determining for each remote station a preferred antenna pattern based upon the antenna database, and selecting a remote station and the corresponding preferred antenna pattern to communicate with. It is also determined based upon the antenna database and prior to communicating with the selected remote station, if any non-selected remote stations have the potential of not being aware when such communications actually occurs.
摘要翻译： 提供了一种在无线局域网（WLAN）中操作接入点的方法。 接入点包括用于与多个远程站通信的定向天线，并且定向天线包括多个天线方向图。 该方法包括通过在接入点和每个远程站之间相关联与多个天线方向图对应的相应测量信号质量来创建天线数据库。 相应的测量信号质量由接入点根据与每个远程站的通信来确定。 该方法还包括基于天线数据库为每个远程站确定优选的天线方向图，并且选择远程站和相应的优选天线方向图进行通信。 还基于天线数据库确定并且在与所选择的远程站通信之前，如果任何未选择的远程站具有当这种通信实际发生时不知道的潜力。
-
公开(公告)号：US07609648B2
公开(公告)日：2009-10-27
申请号：US10870718
申请日：2004-06-17
IPC分类号： H04B7/216
CPC分类号： H04B7/0602 , H04B7/0408 , H04B7/0608 , H04W88/08
摘要： A method for operating an access point in a wireless local area network (WLAN) is provided. The access point includes a directional antenna for communicating with at least one remote station in a forward link based upon an exchange of packet data comprising a plurality of control frames and a data frame. The directional antenna includes a plurality of antenna patterns. The method includes receiving a first control frame via a first antenna pattern of the directional antenna from the remote station, transmitting a first data frame to the remote station, and receiving a second control frame via a second antenna pattern of the directional antenna from the remote station. A signal quality of the first control frame received via the first antenna pattern and a signal quality of the second control frame received via the second antenna pattern are measured. The respective measured signal qualities associated with the first and second antenna patterns are compared.
摘要翻译： 提供了一种在无线局域网（WLAN）中操作接入点的方法。 接入点包括用于基于包括多个控制帧和数据帧的分组数据的交换在前向链路中与至少一个远程站进行通信的定向天线。 定向天线包括多个天线方向图。 该方法包括：从远程站经由定向天线的第一天线方向接收第一控制帧，向远程站发送第一数据帧，并经由定向天线的第二天线方向从远端接收第二控制帧 站。 测量经由第一天线方向图接收的第一控制帧的信号质量和经由第二天线方向图接收的第二控制帧的信号质量。 比较与第一和第二天线图案相关联的相应测量信号质量。
-
公开(公告)号：US07212499B2
公开(公告)日：2007-05-01
申请号：US10675563
申请日：2003-09-30
IPC分类号： H04L12/26
CPC分类号： H04B7/088 , H04B17/318
摘要： A Station Management Entity (SME) steers a directional antenna for a station to communicate with an Access Point (AP) in an 802.11 protocol system. The SME can steer the antenna before or after an 802.11 station has authenticated and associated with the Access Point. During a passive scan, the steering process cycles through the available antenna positions and monitors an AP beacon signal to determine a best position based on, for example, a Received Signal Strength Indication (RSSI). During an active scan where access probing is used, the steering process cycles through the antenna positions and monitors a probe response to determine the best antenna position. Additional scans may be performed based on a decision that the received signal level of the currently selected antenna position has dropped below a predetermined threshold.
-
-
-
-
-
-
-
-
-
搜索结果
33 条记录 (耗时 0.028 秒)
