公开(公告)号：US20150043417A1

公开(公告)日：2015-02-12

申请号：US14524345

申请日：2014-10-27

Applicant: Cisco Technology, Inc.

Inventor： Hui Liu ,  Douglas Chan ,  Tak Ming Pang

IPC: H04L12/18 ,  H04W76/00 ,  H04W72/00

CPC classification number: H04L12/185 ,  H04W12/02 ,  H04W12/06 ,  H04W36/026 ,  H04W36/18 ,  H04W48/20 ,  H04W72/005 ,  H04W80/04 ,  H04W84/12 ,  H04W88/08

Abstract: Techniques are provided for delivering data to a wireless client device in a wireless network via a plurality of access points as the wireless client device roams from one access point to another. A wireless client device receives data via a first wireless access point in the wireless network. An impending roam of a wireless client device is detected. A set of one or more candidate wireless access points other than the first wireless access point is determined to which the wireless client device may potentially roam. The one or more wireless access points in the set are assigned to a multicast group, and the traffic is sent to the multicast group. A message containing a synchronized context enables a new wireless access point to send data to the wireless client device from a point where the first wireless access point stopped sending data to the wireless client device.

Abstract translation: 提供了技术，用于当无线客户端设备从一个接入点漫游到另一接入点时经由多个接入点将数据传送到无线网络中的无线客户端设备。 无线客户端设备经由无线网络中的第一无线接入点接收数据。 检测到无线客户端设备即将发生的漫游。 确定除了第一无线接入点之外的一个或多个候选无线接入点的集合，无线客户端设备可能潜在地漫游到该无线接入点。 集合中的一个或多个无线接入点被分配给组播组，并且业务被发送到组播组。 包含同步上下文的消息使得新的无线接入点能够从第一无线接入点停止向无线客户端设备发送数据的点向无线客户端设备发送数据。

公开(公告)号：US20190191369A1

公开(公告)日：2019-06-20

申请号：US16281284

申请日：2019-02-21

Applicant: Cisco Technology, Inc.

Inventor： Vishal Desai ,  Tak Ming Pang ,  John Blosco

IPC: H04W48/20 ,  H04L12/26 ,  H04L5/00 ,  H04W24/02 ,  H04W52/18

CPC classification number: H04W48/20 ,  H04L5/006 ,  H04L43/08 ,  H04L43/10 ,  H04L43/16 ,  H04W24/02 ,  H04W52/18 ,  H04W52/245 ,  H04W84/12

Abstract: In one embodiment, a method implemented on a computing device includes: selecting a wireless access point (AP) to process from among a deployment of wireless access points (APs), defining a neighborhood based on the AP and neighboring APs, where the neighboring APs are within a one-hop radius of the AP, calculating a client distribution optimal received signal strength indicator (RSSI), where the client distribution optimal RSSI (CD optimal) is a minimum receiver start of packet detection threshold (RX-SOP) setting for maintaining existing client device coverage by the AP, calculating a neighbor relations optimal RSSI threshold (NR optimal), where the NR optimal is a function of at least a transmit power control threshold (TPC) for maintaining visibility between the AP and the neighboring APs, calculating an RX-SOP setting for the AP as a function of CD optimal and NR optimal, and applying the RX-SOP setting to the AP.

公开(公告)号：US09867083B2

公开(公告)日：2018-01-09

申请号：US14255393

申请日：2014-04-17

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hui Liu ,  Tak Ming Pang

IPC: H04W28/08 ,  H04L12/911 ,  H04L12/24 ,  H04W28/16 ,  H04W84/12

CPC classification number: H04W28/08 ,  H04L41/12 ,  H04L47/829 ,  H04W28/16 ,  H04W84/12

Abstract: In one embodiment, a method includes selecting at a network device, seed access points from a plurality of access points and assigning each of the seed access points to a wireless network controller. The seed access points join the assigned wireless network controllers before the remaining access points join the wireless network controllers. Each of the remaining access points is associated with one of the seed access points and joins the same wireless network controller as the seed access point. An apparatus and logic are also disclosed herein.

公开(公告)号：US20170346729A1

公开(公告)日：2017-11-30

申请号：US15675846

申请日：2017-08-14

Applicant: Cisco Technology, Inc.

Inventor： Tak Ming Pang ,  Robert C. Meier ,  Yanxin Na ,  Emburey Samrex Edward

IPC: H04L12/703 ,  H04W40/24 ,  H04L12/753 ,  H04W84/12 ,  H04L12/733

CPC classification number: H04L45/28 ,  H04L45/122 ,  H04L45/48 ,  H04W40/24 ,  H04W84/12

Abstract: A method is performed at a mesh access point (MAP) in a wireless mesh network including access points (APs) of a spanning tree being divided among multiple Internet Protocol (IP) subnets. The method includes receiving from a first parent AP to which the MAP is a child a first IP subnet identifier indicating the first IP subnet to which the first parent AP belongs. The method also includes obtaining a first IP address associated with the first IP subnet, roaming from the first to a second parent AP, receiving from the second parent AP a second IP subnet identifier indicating a second IP subnet to which the second parent AP belongs, determining if the first and second parent APs are both part of the same IP subnet, and determining whether to maintain connectivity with a current controller or establish connectivity to a new controller based on results of the determining.

公开(公告)号：US20160309537A1

公开(公告)日：2016-10-20

申请号：US14687241

申请日：2015-04-15

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  John Matthew Swartz ,  Joshua Suhr ,  Matthew A. Silverman ,  Tak Ming Pang

IPC: H04W76/02 ,  H04B17/318 ,  H04W24/08

CPC classification number: H04W76/027 ,  H04B17/318 ,  H04W76/18

Abstract: In response to receiving a probe request from a mobile client, an access point determines whether it should suppress a probe response. The access point receives a probe request from a wireless client device, and prepares a probe response to respond to the probe request. The access point determines whether the wireless client device is likely to associate with the wireless access point. Responsive to a determination that the wireless client device is unlikely to associate with the wireless access point, the access point suppresses the transmission of the probe response.

Abstract translation: 响应于从移动客户端接收到探测请求，接入点确定是否应该抑制探测响应。 接入点从无线客户端设备接收探测请求，并准备探测响应以响应探测请求。 接入点确定无线客户端设备是否可能与无线接入点相关联。 响应于无线客户端设备不可能与无线接入点相关联的确定，接入点抑制探测响应的传输。

公开(公告)号：US09408249B2

公开(公告)日：2016-08-02

申请号：US14095406

申请日：2013-12-03

Applicant: Cisco Technology, Inc.

Inventor： Tak Ming Pang ,  Robert C. Meier ,  Yanxin Na ,  Emburey Samrex Edward

IPC: H04W84/12 ,  H04W40/24 ,  H04L12/733 ,  H04L12/703 ,  H04L12/753

CPC classification number: H04L45/28 ,  H04L45/122 ,  H04L45/48 ,  H04W40/24 ,  H04W84/12

Abstract: A wireless mesh network includes mesh APs and a root AP forming a root of a tree of the mesh APs in which the mesh APs are linked back to the root AP over wireless backhaul links. The root AP has a wired connection to a wired network. An AP detects a loss of connectivity to a controller through which traffic associated with the AP is normally routed to and from the wired network. In response, if the AP is the root AP, the root AP operates as a proxy controller through which the traffic may be routed. The AP maintains connectivity with parent and child APs over the wireless backhaul links.

Abstract translation: 无线网状网络包括网状AP和根AP，其形成网状AP的树的根，其中网状AP通过无线回程链路链接回根AP。 根AP具有到有线网络的有线连接。 AP检测到与控制器的连接性的丢失，通过该控制器，与AP相关联的流量通常路由到有线网络并从有线网络路由。 作为响应，如果AP是根AP，则根AP作为代理控制器操作，通过该代理控制器可以路由流量。 AP通过无线回程链路保持与父和子AP的连接。

公开(公告)号：US20140086132A1

公开(公告)日：2014-03-27

申请号：US13626983

申请日：2012-09-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hui Liu ,  Douglas Chan ,  Tak Ming Pang

IPC: H04W4/08

CPC classification number: H04L12/185 ,  H04W12/02 ,  H04W12/06 ,  H04W36/026 ,  H04W36/18 ,  H04W48/20 ,  H04W72/005 ,  H04W80/04 ,  H04W84/12 ,  H04W88/08

Abstract: Techniques are provided for delivering data to a wireless client device in a wireless local area network via a plurality of access point devices as the wireless client device roams from one access point device to another. A wireless client device receives data communications (i.e., traffic) via a first wireless access point device in the wireless local area network. An impending roam of a wireless client device is detected. A set of one or more candidate wireless access point devices other than the first wireless access point device is determined to which the wireless client device may potentially roam. The one or more wireless access point devices in the set are assigned to a multicast group, and the traffic is sent to the multicast group.

Abstract translation: 提供了技术，用于当无线客户端设备从一个接入点设备漫游到另一个接入点设备时，经由多个接入点设备将数据传送到无线局域网中的无线客户端设备。 无线客户端设备经由无线局域网中的第一无线接入点设备接收数据通信（即业务）。 检测到无线客户端设备即将发生的漫游。 确定除了第一无线接入点设备之外的一个或多个候选无线接入点设备的集合，无线客户端设备可能潜在地漫游到该无线接入点设备。 集合中的一个或多个无线接入点设备被分配给多播组，并且业务被发送到多播组。

公开(公告)号：US10701627B2

公开(公告)日：2020-06-30

申请号：US16281284

申请日：2019-02-21

Applicant: Cisco Technology, Inc.

Inventor： Vishal Desai ,  Tak Ming Pang ,  John Blosco

IPC: H04W52/02 ,  H04W48/20 ,  H04W52/18 ,  H04L5/00 ,  H04L12/26 ,  H04W24/02 ,  H04W52/24 ,  H04W84/12

Abstract: In one embodiment, a method implemented on a computing device includes: selecting a wireless access point (AP) to process from among a deployment of wireless access points (APs), defining a neighborhood based on the AP and neighboring APs, where the neighboring APs are within a one-hop radius of the AP, calculating a client distribution optimal received signal strength indicator (RSSI), where the client distribution optimal RSSI (CD optimal) is a minimum receiver start of packet detection threshold (RX-SOP) setting for maintaining existing client device coverage by the AP, calculating a neighbor relations optimal RSSI threshold (NR optimal), where the NR optimal is a function of at least a transmit power control threshold (TPC) for maintaining visibility between the AP and the neighboring APs, calculating an RX-SOP setting for the AP as a function of CD optimal and NR optimal, and applying the RX-SOP setting to the AP.

公开(公告)号：US10251123B2

公开(公告)日：2019-04-02

申请号：US15644785

申请日：2017-07-09

Applicant: Cisco Technology, Inc.

Inventor： Vishal Desai ,  Tak Ming Pang ,  John Blosco

IPC: H04W52/02 ,  H04W48/20 ,  H04W52/18 ,  H04L5/00 ,  H04L12/26 ,  H04W24/02 ,  H04W84/12

Abstract: In one embodiment, a method implemented on a computing device includes: selecting a wireless access point (AP) to process from among a deployment of wireless access points (APs), defining a neighborhood based on the AP and neighboring APs, where the neighboring APs are within a one-hop radius of the AP, calculating a client distribution optimal received signal strength indicator (RSSI), where the client distribution optimal RSSI (CD optimal) is a minimum receiver start of packet detection threshold (RX-SOP) setting for maintaining existing client device coverage by the AP, calculating a neighbor relations optimal RSSI threshold (NR optimal), where the NR optimal is a function of at least a transmit power control threshold (TPC) for maintaining visibility between the AP and the neighboring APs, calculating an RX-SOP setting for the AP as a function of CD optimal and NR optimal, and applying the RX-SOP setting to the AP.

公开(公告)号：US20150257117A1

公开(公告)日：2015-09-10

申请号：US14202654

申请日：2014-03-10

Applicant: Cisco Technology, Inc.

Inventor： Neil R. Diener ,  John Matthew Swartz ,  Paul J. Stager ,  Tak Ming Pang

IPC: H04W64/00 ,  H04W48/16

CPC classification number: H04W64/00 ,  H04W8/005 ,  H04W48/06 ,  H04W48/14

Abstract: A first wireless device (e.g., an access point) receives a message from a second wireless device (e.g., a client device). The first device determines an angle-of-arrival of the message at a plurality of antennas of the first wireless device. The first device compares the angle-of-arrival with an angle-of-arrival threshold to determine whether to transmit a response message to the second wireless device. In one example, the first wireless device is a wireless access point device operating in a wireless network, the second wireless device is a wireless client device operating in the wireless network, the message is a probe request message and the response message is a probe response message.

Abstract translation: 第一无线设备（例如，接入点）从第二无线设备（例如，客户端设备）接收消息。 第一设备确定消息在第一无线设备的多个天线处的到达角度。 第一设备将到达角与入场角阈值进行比较，以确定是否向第二无线设备发送响应消息。 在一个示例中，第一无线设备是在无线网络中操作的无线接入点设备，第二无线设备是在无线网络中操作的无线客户端设备，该消息是探测请求消息，并且响应消息是探测响应 信息。