公开(公告)号：US09686688B2

公开(公告)日：2017-06-20

申请号：US14494948

申请日：2014-09-24

Applicant: Cisco Technology, Inc.

Inventor： Ahmadreza Hedayat ,  Rajesh Pazhyannur

IPC: H04W48/00 ,  H04W16/14 ,  H04B7/06 ,  H04B17/309 ,  H04W36/00 ,  H04W84/12

CPC classification number: H04W16/14 ,  H04B7/063 ,  H04B17/309 ,  H04W36/0077 ,  H04W48/00 ,  H04W84/12

Abstract: A Long-Term Evolution-Unlicensed (LTE-U) access point (AP) is configured to operate wirelessly on any of multiple RF channels in an unlicensed frequency band. The AP detects other LTE-U APs and Wi-Fi APs operating on active ones of the multiple channels. The AP determines AP channel statistics for each detected AP. The AP determines, for each active channel, a per-channel metric based on the AP channel statistics. The AP ranks the active channels according to the corresponding per-channel metrics, and selects a best channel on which to transmit in the unlicensed frequency band from among the ranked active channels based on the rankings.

公开(公告)号：US20160044516A1

公开(公告)日：2016-02-11

申请号：US14451930

申请日：2014-08-05

Applicant: Cisco Technology, Inc.

Inventor： Ahmadreza Hedayat ,  Rajesh Pazhyannur

IPC: H04W16/14 ,  H04L12/873 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04L47/52 ,  H04W72/1215 ,  H04W72/1247 ,  H04W84/12 ,  H04W88/10

Abstract: A wireless access point (AP) configured to operate in accordance with both Wi-Fi and Long-Term Evolution (LTE-U) standards/protocols jointly schedules transmit opportunities for Wi-Fi and LTE-U frames. The AP assigns one of multiple, prioritized, Wi-Fi access categories to each Wi-Fi transmit frame based on a type of data in the transmit frame. The AP also assigns to each LTE-U transmit frame an LTE-U access category prioritized relative to the Wi-Fi access categories. The AP schedules Wi-Fi and LTE-U transmit opportunities for the Wi-Fi transmit frames and the LTE-U transmit frames, respectively, in the shared channel bandwidth based on the prioritized Wi-Fi and LTE-U access categories.

Abstract translation: 配置为根据Wi-Fi和长期演进（LTE-U）标准/协议进行操作的无线接入点（AP）联合调度Wi-Fi和LTE-U帧的发送机会。 AP根据发送帧中的数据类型，为每个Wi-Fi发送帧分配多个优先级的Wi-Fi接入类别中的一个。 AP还为每个LTE-U发送帧分配相对于Wi-Fi接入类别优先化的LTE-U接入类别。 AP基于优先级的Wi-Fi和LTE-U接入类别，分配在共享信道带宽中的Wi-Fi发射帧和LTE-U发射帧的Wi-Fi和LTE-U传输机会。

公开(公告)号：US10142951B2

公开(公告)日：2018-11-27

申请号：US15147286

申请日：2016-05-05

Applicant: Cisco Technology, Inc.

Inventor： Raymond Yuk Chor Kwan ,  Peter Keevill ,  James Paul Seymour ,  Rajesh Pazhyannur ,  Patrick Georges Venceslas Charriere

IPC: H04W56/00 ,  H04L5/00 ,  H04L1/18 ,  H04W28/26

Abstract: An LAA-LTE wireless device obtains data to be transmitted in subframes over a shared spectrum. The wireless device transmits a reservation message over the shared spectrum. The reservation message indicates that an initial synchronization message will be retransmitted a specified number of times at specified intervals, such as with a predetermined number of subframes between each retransmitted synchronization message. The wireless device transmits the initial synchronization message over the shared spectrum.

公开(公告)号：US10014991B2

公开(公告)日：2018-07-03

申请号：US14881479

申请日：2015-10-13

Applicant: Cisco Technology, Inc.

Inventor： Vikram Chandrasekhar ,  James Seymour ,  Rajesh Pazhyannur ,  Andrew Myles

IPC: H04L5/00 ,  H04W16/14 ,  H04W72/12 ,  H04L5/14

CPC classification number: H04L5/0007 ,  H04L5/0032 ,  H04L5/0044 ,  H04L5/0071 ,  H04L5/0087 ,  H04L5/0091 ,  H04L5/14 ,  H04W16/14 ,  H04W72/1263 ,  H04W72/1278

Abstract: Modifications to frame/subframe structure are presented herein so that a wireless device can transmit its data within a fraction of a subframe. The device obtains data to be transmitted in an unlicensed spectrum and determines whether an entire subframe is required to completely communicate the data. If the data is small enough to not require the entire subframe, then the device generates a burst transmission to minimize the time period of the subframe used to communicate the data. The device transmits the burst transmission and a parameter indicating the duration of the burst transmission.

公开(公告)号：US09930535B2

公开(公告)日：2018-03-27

申请号：US14451930

申请日：2014-08-05

Applicant: Cisco Technology, Inc.

Inventor： Ahmadreza Hedayat ,  Rajesh Pazhyannur

IPC: H04W16/14 ,  H04L12/873 ,  H04W72/12 ,  H04W88/10 ,  H04W84/12

CPC classification number: H04W16/14 ,  H04L47/52 ,  H04W72/1215 ,  H04W72/1247 ,  H04W84/12 ,  H04W88/10

Abstract: A wireless access point (AP) configured to operate in accordance with both Wi-Fi and Long-Term Evolution (LTE-U) standards/protocols jointly schedules transmit opportunities for Wi-Fi and LTE-U frames. The AP assigns one of multiple, prioritized, Wi-Fi access categories to each Wi-Fi transmit frame based on a type of data in the transmit frame. The AP also assigns to each LTE-U transmit frame an LTE-U access category prioritized relative to the Wi-Fi access categories. The AP schedules Wi-Fi and LTE-U transmit opportunities for the Wi-Fi transmit frames and the LTE-U transmit frames, respectively, in the shared channel bandwidth based on the prioritized Wi-Fi and LTE-U access categories.

公开(公告)号：US20170325098A1

公开(公告)日：2017-11-09

申请号：US15147290

申请日：2016-05-05

Applicant: Cisco Technology, Inc.

Inventor： Raymond Yuk Chor Kwan ,  Peter Keevill ,  James Paul Seymour ,  Rajesh Pazhyannur

IPC: H04W16/14 ,  H04W72/04 ,  H04W56/00 ,  H04W72/08 ,  H04W24/02

CPC classification number: H04W16/14 ,  H04W24/02 ,  H04W56/001 ,  H04W74/0816

Abstract: A wireless device accesses a shared spectrum equitably in a self-organizing manner by determining success indices and adjusting courtesy parameters. The wireless device transmits wireless transmissions in a frame subframe structure over a shared spectrum, each of the subframes bounded by subframe boundaries at predetermined time intervals. The success index represents a measure of success in transmitting wireless transmissions in the shared spectrum. The wireless device performs a clear channel assessment to determine whether the shared spectrum is available at the end of the clear channel assessment time interval. The wireless device determines a gap interval between the end of the clear channel assessment time interval and the next subframe boundary and transmits the success index during the gap interval.

公开(公告)号：US20170041957A1

公开(公告)日：2017-02-09

申请号：US15057733

申请日：2016-03-01

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Vikram Chandrasekhar ,  Raymond Yuk Chor Kwan

IPC: H04W74/08

CPC classification number: H04W74/0808 ,  H04L1/1812 ,  H04L1/203 ,  H04L2001/0093

Abstract: A first wireless device determines the duration of a clear channel assessment interval based on feedback signals before transmitting data to a second wireless device. The first wireless device receives feedback signals, such as acknowledgement (ACK) and negative acknowledgement (NAK) signals, from one or more second wireless devices. The first wireless device determines a ratio of NAK/ACK signals in the feedback signals for a predetermined amount of time. The first wireless device determines whether the wireless medium is free by monitoring for wireless signals during a clear channel assessment interval. The duration of the clear channel assessment interval is based on the ratio of NAK/ACK signals. If the wireless medium is free for the duration of the clear channel assessment, the first wireless device wirelessly transmits data to at least one of the second wireless devices.

Abstract translation: 第一无线设备在将数据发送到第二无线设备之前基于反馈信号来确定清除信道评估间隔的持续时间。 第一无线设备从一个或多个第二无线设备接收诸如确认（ACK）和否定确认（NAK）信号的反馈信号。 第一无线设备确定反馈信号中的NAK / ACK信号的比例达预定的时间量。 第一无线设备通过在清除信道评估间隔期间监视无线信号来确定无线介质是否空闲。 清除信道评估间隔的持续时间基于NAK / ACK信号的比率。 如果无线介质在清除信道评估期间是空闲的，则第一无线设备向第二无线设备中的至少一个无线地发送数据。

公开(公告)号：US20170041805A1

公开(公告)日：2017-02-09

申请号：US15227099

申请日：2016-08-03

Applicant: Cisco Technology, Inc.

Inventor： Vikram Chandrasekhar ,  Kedar Shirali ,  Qing Zhao ,  Rajesh Pazhyannur

IPC: H04W16/14 ,  H04L1/18 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04L1/1812 ,  H04L1/1896 ,  H04W74/0816

Abstract: A mobile device obtains data to be wirelessly transmitted over a shared spectrum in an uplink channel to a base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a Listen Before Transmit procedure. When the shared spectrum is free for transmission, the mobile device selects a start time in the uplink channel that mitigates interference from other mobile devices in proximity to the mobile device. Beginning at the start time, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.

Abstract translation: 移动设备获取在上行链路信道中通过共享频谱无线发送的数据到基站。 上行链路信道用预定定时的帧/子帧结构格式化。 移动设备根据“在侦听之前”过程确定共享频谱是否可用于传输。 当共享频谱不需要传输时，移动设备选择上行链路信道中的起始时间，以减轻来自移动设备附近的其他移动设备的干扰。 从开始时开始，移动设备通过上行链路信道中的共享频谱将数据发送到基站。

公开(公告)号：US20160157293A1

公开(公告)日：2016-06-02

申请号：US14835985

申请日：2015-08-26

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Vivek Jha

IPC: H04W76/04 ,  H04W72/04 ,  H04W48/20 ,  H04W74/02

CPC classification number: H04W76/27 ,  H04W76/15 ,  H04W76/34 ,  H04W84/12 ,  H04W92/20

Abstract: A first network device may operate as a base station in a wireless wide area network (WWAN) and may establish a WWAN connection with a user device. A media access control (MAC) address of the user device may be obtained and sent to a second network device which operates an access point for a wireless local area network (WLAN). An acknowledgement containing a first service set identifier of the WLAN may be received from the second network device and sent to the user device to set up a secondary connection. An identifier for ordered data communication may used to enable in order communication through both the first and the second network devices. Data to be transmitted to the user device may be split into a first portion and a second portion, and transmitted through the WWAN connection and to the second network device for transmission to the user device via the WLAN respectively.

Abstract translation: 第一网络设备可以作为无线广域网（WWAN）中的基站来操作，并且可以建立与用户设备的WWAN连接。 可以获得用户设备的媒体访问控制（MAC）地址并将其发送到操作无线局域网（WLAN）的接入点的第二网络设备。 可以从第二网络设备接收包含WLAN的第一服务集标识符的确认，并发送给用户设备以建立辅助连接。 用于有序数据通信的标识符可以用于使得能够通过第一和第二网络设备进行顺序通信。 要发送到用户设备的数据可以被分成第一部分和第二部分，并且通过WWAN连接和第二网络设备传输，以经由WLAN分别传送到用户设备。

公开(公告)号：US20160135185A1

公开(公告)日：2016-05-12

申请号：US14881479

申请日：2015-10-13

Applicant: Cisco Technology, Inc.

Inventor： Vikram Chandrasekhar ,  James Seymour ,  Rajesh Pazhyannur ,  Andrew Myles

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/14

CPC classification number: H04L5/0007 ,  H04L5/0032 ,  H04L5/0044 ,  H04L5/0071 ,  H04L5/0087 ,  H04L5/0091 ,  H04L5/14 ,  H04W16/14 ,  H04W72/1263 ,  H04W72/1278

Abstract: Modifications to frame/subframe structure are presented herein so that a wirelessdevice can transmit its data within a fraction of a subframe. The device obtains data to be transmitted in an unlicensed spectrum and determines whether an entire subframe is required to completely communicate the data. If the data is small enough to not require the entire subframe, then the device generates a burst transmission to minimize the time period of the subframe used to communicate the data. The device transmits the burst transmission and a parameter indicating the duration of the burst transmission.

Abstract translation: 本文给出了对帧/子帧结构的修改，使得无线设备可以在子帧的一小部分内传送其数据。 该装置获得将在未许可频谱中发送的数据，并且确定是否需要整个子帧来完全传送数据。 如果数据足够小以至不需要整个子帧，则设备产生突发传输以最小化用于传送数据的子帧的时间段。 设备发送突发传输和指示突发传输的持续时间的参数。