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公开(公告)号:US08625507B1
公开(公告)日:2014-01-07
申请号:US12932801
申请日:2011-03-07
申请人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
发明人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
CPC分类号: H04B7/0689 , H04B7/0413 , H04B7/0628 , H04B7/0871 , H04W28/22 , H04W84/12
摘要: An apparatus and method for operating a Multiple Input Multiple Output (MIMO)-capable subscriber node are disclosed. In one embodiment, an apparatus includes a MIMO-capable physical layer transceiver and a Medium Access Control (MAC) layer block that measures a received transmission to determine channel conditions. Upon receiving a transmission wherein said channel conditions meet specified conditions, the MAC layer block transmits a message to an access point indicating that the apparatus wants to switch between a non-MIMO mode and a MIMO mode, and upon receiving an acknowledgement, the MAC layer block switches between the non-MIMO mode and the MIMO mode. An apparatus for operating an access node is also disclosed.
摘要翻译: 公开了一种用于操作多输入多输出(MIMO)能力的用户节点的装置和方法。 在一个实施例中,一种装置包括MIMO能力的物理层收发机和媒体接入控制(MAC)层块,其测量接收到的传输以确定信道状况。 在接收到所述信道条件满足指定条件的传输时,MAC层块向接入点发送指示设备在非MIMO模式和MIMO模式之间切换的消息,并且在接收到确认时,MAC层 在非MIMO模式和MIMO模式之间进行块切换。 还公开了一种用于操作接入节点的装置。
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公开(公告)号:US07301924B1
公开(公告)日:2007-11-27
申请号:US10197300
申请日:2002-07-15
申请人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
发明人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
CPC分类号: H04B7/0689 , H04B7/0413 , H04B7/0628 , H04B7/0871 , H04W28/22 , H04W84/12
摘要: The MAC layer of a wireless communication standard is modified to facilitate MIMO (multiple input multiple output) processing and thereby increase capacity and/or spectral efficiency. In one implementation, the IEEE 802.11a standard is modified in this way. A contention free period (CFP) is divided between MIMO communications and non-MIMO communications. An access point may maintain a list of nodes operating in MIMO mode and nodes operating in non-MIMO mode.
摘要翻译: 修改无线通信标准的MAC层以促进MIMO(多输入多输出)处理,从而增加容量和/或频谱效率。 在一个实现中,以这种方式修改IEEE 802.11a标准。 无竞争时段(CFP)在MIMO通信和非MIMO通信之间划分。 接入点可以保持在MIMO模式下操作的节点列表以及以非MIMO模式工作的节点。
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公开(公告)号:US07929412B1
公开(公告)日:2011-04-19
申请号:US11974848
申请日:2007-10-16
申请人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
发明人: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
CPC分类号: H04B7/0689 , H04B7/0413 , H04B7/0628 , H04B7/0871 , H04W28/22 , H04W84/12
摘要: An apparatus and method for operating a Multiple Input Multiple Output (MIMO)-capable subscriber node are disclosed. In one embodiment, an apparatus includes a MIMO-capable physical layer transceiver and a Medium Access Control (MAC) layer block that measures a received transmission to determine channel conditions. Upon receiving a transmission wherein said channel conditions meet specified conditions, the MAC layer block requests an access point for permission to switch between a non-MIMO mode and a MIMO mode, and upon receiving permission, the MAC layer block switches between the non-MIMO mode and the MIMO mode. An apparatus for operating an access node is also disclosed.
摘要翻译: 公开了一种用于操作多输入多输出(MIMO)能力的用户节点的装置和方法。 在一个实施例中,一种装置包括MIMO能力的物理层收发机和媒体接入控制(MAC)层块,其测量接收到的传输以确定信道状况。 在接收到其中所述信道条件满足指定条件的传输时,MAC层块请求接入点以允许在非MIMO模式和MIMO模式之间切换,并且在接收到许可后,MAC层块在非MIMO 模式和MIMO模式。 还公开了一种用于操作接入节点的装置。
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公开(公告)号:US07352718B1
公开(公告)日:2008-04-01
申请号:US10624653
申请日:2003-07-22
CPC分类号: H04L65/601 , H04B7/0413 , H04B7/10 , H04L1/0083 , H04L1/1607 , H04L1/1854 , H04L2001/0093 , H04W16/28 , H04W52/04 , H04W72/0406 , H04W88/10
摘要: Multiple Input Multiple Output (MIMO) technology in conjunction with the IEEE 802.11 standard enables simultaneous communication of data packets to or from multiple users in the same frequency. Spatial divisional multiple access (SDMA) is thus provided. In this way, system capacity can be increased to an extent that depends on available antenna resources and the multipath characteristics of the communication channel. Doubling or quadrupling of network throughput can be achieved.
摘要翻译: 结合IEEE 802.11标准的多输入多输出(MIMO)技术可以实现与同一频率的多个用户的数据包同时通信。 因此提供了空分多址(SDMA)。 以这种方式,可以将系统容量增加到取决于可用天线资源和通信信道的多径特性的程度。 可以实现网络吞吐量的两倍或四倍。
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公开(公告)号:US08737328B1
公开(公告)日:2014-05-27
申请号:US13135191
申请日:2011-06-28
CPC分类号: H04L65/601 , H04B7/0413 , H04B7/10 , H04L1/0083 , H04L1/1607 , H04L1/1854 , H04L2001/0093 , H04W16/28 , H04W52/04 , H04W72/0406 , H04W88/10
摘要: Multiple Input Multiple Output (MIMO) technology in conjunction with the IEEE 802.11 standard enables simultaneous communication of data packets to or from multiple users in the same frequency. Spatial divisional multiple access (SDMA) is thus provided. In this way, system capacity can be increased to an extent that depends on available antenna resources and the multipath characteristics of the communication channel. Doubling or quadrupling of network throughput can be achieved.
摘要翻译: 结合IEEE 802.11标准的多输入多输出(MIMO)技术可以实现与同一频率的多个用户的数据包同时通信。 因此提供了空分多址(SDMA)。 以这种方式,可以将系统容量增加到取决于可用天线资源和通信信道的多径特性的程度。 可以实现网络吞吐量的两倍或四倍。
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公开(公告)号:US07995525B1
公开(公告)日:2011-08-09
申请号:US12011561
申请日:2008-01-28
CPC分类号: H04L65/601 , H04B7/0413 , H04B7/10 , H04L1/0083 , H04L1/1607 , H04L1/1854 , H04L2001/0093 , H04W16/28 , H04W52/04 , H04W72/0406 , H04W88/10
摘要: Multiple Input Multiple Output (MIMO) technology in conjunction with the IEEE 802.11 standard enables simultaneous communication of data packets to or from multiple users in the same frequency. Spatial divisional multiple access (SDMA) is thus provided. In this way, system capacity can be increased to an extent that depends on available antenna resources and the multipath characteristics of the communication channel. Doubling or quadrupling of network throughput can be achieved.
摘要翻译: 结合IEEE 802.11标准的多输入多输出(MIMO)技术可以实现与同一频率的多个用户的数据包同时通信。 因此提供了空分多址(SDMA)。 以这种方式,可以将系统容量增加到取决于可用天线资源和通信信道的多径特性的程度。 可以实现网络吞吐量的两倍或四倍。
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公开(公告)号:US08374105B1
公开(公告)日:2013-02-12
申请号:US12011546
申请日:2008-01-28
申请人: Eldad Perahia , Bretton Douglas , David Pignatelli
发明人: Eldad Perahia , Bretton Douglas , David Pignatelli
CPC分类号: H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
摘要: A specialized preamble is provided to facilitate matrix channel estimation of a MIMO channel. In a particular implementation, a channel training preamble provided by the IEEE 802.11a standard is modified to facilitate MIMO channel estimation.
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公开(公告)号:US07352688B1
公开(公告)日:2008-04-01
申请号:US10335500
申请日:2002-12-31
申请人: Eldad Perahia , Bretton Douglas , David Pignatelli
发明人: Eldad Perahia , Bretton Douglas , David Pignatelli
IPC分类号: H04J11/00
CPC分类号: H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
摘要: A specialized preamble is provided to facilitate matrix channel estimation of a MIMO channel. In a particular implementation, a channel training preamble provided by the IEEE 802.11a standard is modified to facilitate MIMO channel estimation.
摘要翻译: 提供专用前置码以便于MIMO信道的矩阵信道估计。 在特定实现中,由IEEE 802.11a标准提供的信道训练前导码被修改以便于MIMO信道估计。
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公开(公告)号:US20070171909A1
公开(公告)日:2007-07-26
申请号:US11335991
申请日:2006-01-20
申请人: David Pignatelli
发明人: David Pignatelli
IPC分类号: H04L12/56
CPC分类号: H04L45/125 , H04L45/24 , H04L45/30 , H04L47/10 , H04L47/11 , H04L47/12 , H04L47/14 , H04L47/2416 , H04L47/283 , H04L47/50 , H04L47/56 , H04W28/14 , H04W40/00 , H04W72/1236 , H04W72/1242
摘要: A QoS mechanism that evaluates congestion in one or more network nodes along the wireless delivery path to optimize the processing priority at the centralized wireless network controller. The QoS mechanism determines an idealized processing time for a given client packet, within a rich set of configurable QoS attributes, for a given defined flow and then adjusts the expectation of delivering the packet based on resource congestion measurements of the wireless infrastructure.
摘要翻译: 一种评估沿着无线传送路径的一个或多个网络节点拥塞的QoS机制,以优化集中式无线网络控制器处理优先级。 针对给定的定义的流程,QoS机制确定在一组丰富的可配置QoS属性中的给定客户端分组的理想化处理时间,然后基于无线基础设施的资源拥塞测量来调整递送分组的期望。
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公开(公告)号:US06611551B1
公开(公告)日:2003-08-26
申请号:US09234929
申请日:1999-01-21
IPC分类号: H03B138
CPC分类号: H04L25/0226 , H04L27/2647
摘要: A system and method for characterizing a channel used by a digital communication system. In an OFDM system, the number of training symbols used to characterize a channel may be decreased by taking advantage of knowledge of certain channel components, e.g., transmitter and/or receiver digital filters. The number of training symbols used may be less than v, the duration of the impulse response of the overall channel.
摘要翻译: 一种用于表征数字通信系统使用的信道的系统和方法。 在OFDM系统中,可以通过利用某些信道分量的知识(例如,发射机和/或接收机数字滤波器)来减少用于表征信道的训练符号的数量。 使用的训练符号的数量可以小于v,整个信道的脉冲响应的持续时间。
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