公开(公告)号：US20160135080A1

公开(公告)日：2016-05-12

申请号：US14933056

申请日：2015-11-05

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Brian Hart ,  Andrew Myles ,  Vikram Chandrasekhar

IPC: H04W28/04 ,  H04L12/26 ,  H04W72/04 ,  H04B17/318

CPC classification number: H04W28/04 ,  H04B17/318 ,  H04L43/16 ,  H04W16/14 ,  H04W72/044 ,  H04W74/0808 ,  H04W84/12

Abstract: Presented herein are mechanisms to reduce collisions in deployments with Wi-Fi and Shared Access LTE (SAC-LTE) equipment as well SAC-LTE equipment from multiple operators. The mechanisms enhance the baseline energy detection mechanism by incorporating methods to decode cross-technology physical layer elements and media access control (MAC) layer elements in the Wi-Fi system to elements in the SAC-LTE system. The methods described improve the detection potential for transmitters, thereby reducing chances of cross-technology collisions.

Abstract translation: 这里提出的是利用Wi-Fi和共享接入LTE（SAC-LTE）设备以及来自多个运营商的SAC-LTE设备来减少部署中的冲突的机制。 这些机制通过并入将Wi-Fi系统中的跨技术物理层元素和媒体访问控制（MAC）层元素解码为SAC-LTE系统中的元素的方法来增强基线能量检测机制。 所描述的方法提高了发射机的检测潜力，从而减少了跨技术冲突的机会。

公开(公告)号：US20160088631A1

公开(公告)日：2016-03-24

申请号：US14494948

申请日：2014-09-24

Applicant: Cisco Technology, Inc.

Inventor： Ahmadreza Hedayat ,  Rajesh Pazhyannur

IPC: H04W72/06 ,  H04W72/08

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.

Abstract translation: 长期演进 - 未许可（LTE-U）接入点（AP）被配置为在非许可频带中的多个RF信道中的任一个上以无线方式操作。 AP检测在多个通道中的活动的一个上操作的其他LTE-U AP和Wi-Fi AP。 AP确定每个检测到的AP的AP信道统计信息。 AP为每个活动信道确定基于AP信道统计信息的每信道度量。 AP根据相应的每信道度量来对活跃信道进行排名，并且基于排名选择在未授权频带中从排序的活动信道中发送的最佳信道。

公开(公告)号：US20180288625A1

公开(公告)日：2018-10-04

申请号：US15991155

申请日：2018-05-29

Applicant: Cisco Technology, Inc.

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

IPC: H04W16/14 ,  H04L1/18 ,  H04W74/08

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

Abstract: A mobile device transmits data over a shared spectrum in an uplink channel to a base station in a contention-based access scheme. The mobile device obtains data to be wirelessly transmitted over the shared spectrum in the uplink channel to the 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 contends with other mobile device to gain access to the uplink channel. After gaining access to the uplink channel, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.

公开(公告)号：US20180176791A1

公开(公告)日：2018-06-21

申请号：US15897351

申请日：2018-02-15

Applicant: Cisco Technology, Inc.

Inventor： Ahmadreza Hedayat ,  Rajesh Pazhyannur

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

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

Abstract: An access point (AP) transmits Wi-Fi transmit frames according to a Wi-Fi protocol and Long-Term Evolution-Unlicensed (LTE-U) transmit frames according to an LTE-U protocol in a shared channel bandwidth that encompasses unlicensed channel bandwidth associated with the LTE-U protocol. The AP assigns a Wi-Fi access category to each Wi-Fi transmit frame and assigns to each LTE-U transmit frame an LTE-U access category. 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 Wi-Fi and LTE-U access categories. The scheduling includes, for each scheduled LTE-U transmit opportunity: constructing a Wi-Fi quiet message commanding Wi-Fi clients of the AP not to transmit in the shared channel bandwidth during the LTE-U transmit opportunity; and scheduling the Wi-Fi quiet message for transmission to the Wi-Fi clients.

公开(公告)号：US09967771B2

公开(公告)日：2018-05-08

申请号：US14933056

申请日：2015-11-05

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Brian Hart ,  Andrew Myles ,  Vikram Chandrasekhar

IPC: H04W28/04 ,  H04B17/318 ,  H04L12/26 ,  H04W72/04 ,  H04W16/14 ,  H04W74/08 ,  H04W84/12

CPC classification number: H04W28/04 ,  H04B17/318 ,  H04L43/16 ,  H04W16/14 ,  H04W72/044 ,  H04W74/0808 ,  H04W84/12

Abstract: Presented herein are mechanisms to reduce collisions in deployments with Wi-Fi and Shared Access LTE (SAC-LTE) equipment as well SAC-LTE equipment from multiple operators. The mechanisms enhance the baseline energy detection mechanism by incorporating methods to decode cross-technology physical layer elements and media access control (MAC) layer elements in the Wi-Fi system to elements in the SAC-LTE system. The methods described improve the detection potential for transmitters, thereby reducing chances of cross-technology collisions.

公开(公告)号：US09807821B2

公开(公告)日：2017-10-31

申请号：US14601044

申请日：2015-01-20

Applicant: Cisco Technology, Inc.

Inventor： Vivek Jha ,  Rajesh Pazhyannur ,  Maulik Vaidya

IPC: H04W4/00 ,  H04W92/20 ,  H04W16/14 ,  H04W36/22 ,  H04W88/10

CPC classification number: H04W92/20 ,  H04W16/14 ,  H04W36/22 ,  H04W88/10

Abstract: Systems and methods for providing host-neutral small cells include communicating with a first User Equipment (UE) at a small cell. The first UE communicates with the small cell via a first Evolved Node B (eNodeB) base station associated with a first Evolved Packet Core (EPC). The small cell further communicates with a second UE. The second UE communicates with the small cell via a second eNodeB base station associated with a second EPC. Although a different wireless carrier may be associated with each of the first and second UEs, they may both communicate with the host-neutral small cell.

公开(公告)号：US09480100B2

公开(公告)日：2016-10-25

申请号：US14155567

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Rohit Suri

IPC: H04W76/04 ,  H04W40/00 ,  H04W88/18 ,  H04W80/04 ,  H04W40/36 ,  H04W36/00

CPC classification number: H04W76/22 ,  H04W36/0016 ,  H04W40/00 ,  H04W40/36 ,  H04W80/04 ,  H04W88/182 ,  H04W92/20

Abstract: A controller controls access points (APs) in a network of APs. The controller causes the first AP to establish an Internet Protocol (IP) tunnel with a router connected with a wired network and over which data packets are routed between the wired network and a client device wirelessly connected to the first AP. The controller receives a roam indication that the client device is wirelessly connected with a second AP. In response to the indication, the controller instructs the first AP to maintain the IP tunnel with the router and instructs the second AP to establish an inter-AP tunnel with the first AP in order to route traffic between the wired network and the client device over both the IP tunnel and the inter-AP tunnel.

Abstract translation: 控制器控制AP网络中的接入点（AP）。 控制器使得第一AP与与有线网络连接的路由器建立互联网协议（IP）隧道，并且在有线网络和无线连接到第一AP的客户端设备之间路由数据包。 控制器接收漫游指示，说明客户端设备与第二AP无线连接。 响应于该指示，控制器指示第一AP维护与路由器的IP隧道，并指示第二AP与第一AP建立AP间隧道，以便通过有线网络和客户端设备之间路由流量 IP隧道和AP间隧道。

公开(公告)号：US20160156548A1

公开(公告)日：2016-06-02

申请号：US14844633

申请日：2015-09-03

Applicant: Cisco Technology, Inc.

Inventor： Rajesh Pazhyannur ,  Vivek Jha

IPC: H04L12/707

CPC classification number: H04W28/08 ,  H04L45/245 ,  H04L47/30 ,  H04L47/34 ,  H04W28/0231 ,  H04W28/0268 ,  H04W72/087 ,  H04W80/02 ,  H04W88/06

Abstract: Data to be transmitted to a user device may be received at a network device. It may be determined that the user device has network connectivity to the network device via a wide area wireless network connection and that the user device also separately has connectivity to the network device via a local area wireless network connection to an access point. The data may be split so that some portion of the data is to be transmitted by the wide area wireless network connection and another portion of the data is to be transmitted by the local area wireless network connection.

Abstract translation: 可以在网络设备处接收要发送到用户设备的数据。 可以确定用户设备经由广域无线网络连接具有到网络设备的网络连接，并且用户设备还通过到接入点的局域无线网络连接单独地具有到网络设备的连接。 数据可以被分割，使得数据的某些部分将通过广域无线网络连接传输，并且数据的另一部分将通过本地无线网络连接传输。

公开(公告)号：US20160135189A1

公开(公告)日：2016-05-12

申请号：US14933058

申请日：2015-11-05

Applicant: Cisco Technology, Inc.

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

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/0453 ,  H04L5/005 ,  H04W16/14 ,  H04W74/002 ,  H04W74/0816

Abstract: A method is provided for minimizing cross-technology interference with data transmissions from a wireless device in a shared spectrum. The wireless device obtains data to be wirelessly transmitted in a transmission burst in a first radio access technology (RAT) format over a shared spectrum. The wireless device generates a preamble comprising assistance information related to the transmission burst. The preamble comprises a first preamble portion in the first RAT format and a second preamble portion in a second RAT format. The wireless device transmits the preamble followed by the transmission burst.

Abstract translation: 提供了一种用于使来自共享光谱中的无线设备的数据传输的跨技术干扰最小化的方法。 无线设备以共享频谱的第一无线电接入技术（RAT）格式在传输突发中获得要无线发送的数据。 无线设备产生包括与传输突发相关的辅助信息的前同步码。 前导码包括第一RAT格式的第一前导码部分和第二RAT格式的第二前导码部分。 无线设备发送前导跟随传输突发。