-
公开(公告)号:US09131029B1
公开(公告)日:2015-09-08
申请号:US14246330
申请日:2014-04-07
Applicant: CISCO TECHNOLOGY, INC.
Inventor: Eldad Perahia , Bretton Douglas , David Pignatelli , David Stephenson
CPC classification number: H04L65/601 , H04B7/0413 , H04B7/10 , H04L1/0083 , H04L1/1607 , H04L1/1854 , H04L2001/0093 , H04W16/28 , H04W52/04 , H04W72/0406 , H04W88/10
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号:US09236928B1
公开(公告)日:2016-01-12
申请号:US14082666
申请日:2013-11-18
Applicant: CISCO TECHNOLOGY, INC.
Inventor: Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
CPC classification number: H04B7/0689 , H04B7/0413 , H04B7/0628 , H04B7/0871 , H04W28/22 , H04W84/12
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号:US09054934B1
公开(公告)日:2015-06-09
申请号:US14134050
申请日:2013-12-19
Applicant: CISCO TECHNOLOGY, INC.
Inventor: Eldad Perahia , Bretton Douglas , David Pignatelli
CPC classification number: H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号:US08644430B1
公开(公告)日:2014-02-04
申请号:US13664218
申请日:2012-10-30
Applicant: Cisco Technology, Inc.
Inventor: Eldad Perahia , Bretton Douglas , David Pignatelli
IPC: H04L27/06
CPC classification number: H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
Abstract: 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.
Abstract translation: 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。
-
-
-