公开(公告)号：US10820266B2

公开(公告)日：2020-10-27

申请号：US16120088

申请日：2018-08-31

Applicant: Cisco Technology, Inc.

Inventor： Apurv Bhartia ,  Simon Eric Miani Barber ,  Feng Wang ,  Derrick Lyndon Pallas

IPC: H04W48/20 ,  H04W76/10 ,  H04W24/08 ,  H04B17/318 ,  H04W24/10

Abstract: A disclosed method is performed at an access point including a processor and non-transitory memory. The method includes receiving a request message from a client device, where the request message includes a request for an allocation of a wireless channel for the client device from the access point. The method further includes exchanging candidate and load information with a plurality of other access points. The method additionally includes selecting a preferred access point from the access point and the plurality of other access points based on the candidate and load information exchanged with the plurality of other access points. The method also includes facilitating the allocation of the wireless channel for the client device from the preferred access point.

公开(公告)号：US20200100155A1

公开(公告)日：2020-03-26

申请号：US16246408

申请日：2019-01-11

Applicant: Cisco Technology, Inc.

Inventor： Ram Gupta ,  Aditya Kadur ,  Mark Hendrick, JR. ,  Bo Chen ,  Apurv Bhartia ,  Derrick Lyndon Pallas ,  Chun Meng Yu

IPC: H04W36/08 ,  H04L12/24 ,  H04W36/38

Abstract: A method includes obtaining client information from a set of access points. The client information indicates client devices detected by each access point in the set of access points. In some implementations, the method includes grouping the set of access points into a plurality of access point groups based on the client information. The grouping allows each client device to associate with an access point from at least two different access point groups. The method includes, for a first access point group of the plurality of access point groups, migrating the client devices associated with access points in the first access point group to access points in a second access point group of the plurality of access point groups. In some implementations, the method includes configuring the access points in the first access point group while maintaining configuration of the access points in the second access point group.

公开(公告)号：US10595240B2

公开(公告)日：2020-03-17

申请号：US16409700

申请日：2019-05-10

Applicant: Cisco Technology Inc.

Inventor： Apurv Bhartia ,  Lizhen Lin

IPC: H04W36/00 ,  H04W36/18 ,  H04W36/30 ,  H04W12/04 ,  H04W36/02 ,  H04L29/08 ,  H04L29/06 ,  G06F9/50 ,  H04W12/02 ,  H04W36/08

Abstract: A wireless network system that provides for seamless roaming of client devices is described. The wireless network system includes a plurality of access points. One access point is designated as the primary access point that is responsible for handling encrypted communication with the client device. The primary access point has access to the necessary encryption key(s) for encrypted communication. The primary access point receives broadcast updates from the other access points that includes connection scores. When a connection score for a second access point exceeds the connection score of the current primary access point, the current primary access point designates the second access point as the new primary access point and sends the new primary access point the encryption key(s) for encrypted communication. The handoff is seamless and does not require a new handshake between the new primary access point and the client device.

公开(公告)号：US20200076926A1

公开(公告)日：2020-03-05

申请号：US16118202

申请日：2018-08-30

Applicant: Cisco Technology, Inc.

Inventor： Simon Barber ,  Derrick Pallas ,  Apurv Bhartia

IPC: H04L29/06 ,  H04L12/801

Abstract: Systems, methods, and computer-readable media for reducing latency in TCP connections that utilize loss insensitive congestion control mechanisms. In some examples, packet arrival times for one or more TCP packets of a TCP connection are analyzed and based on the analysis, it is determined whether the packet arrival times are constantly spaced over a period of time. Whether a TCP control mechanism for the TCP connection is loss insensitive is identified based on whether the packet arrival times are constantly spaced over time. If it is determined that the TCP control mechanism is loss insensitive, then a total number of acknowledgement packets transmitted during the TCP connection and associated with transmission of the one or more TCP packets in the TCP connection is reduced.

公开(公告)号：US20190274068A1

公开(公告)日：2019-09-05

申请号：US16417083

申请日：2019-05-20

Applicant: Cisco Technology, Inc.

Inventor： Apurv Bhartia ,  Feng Wang ,  Derrick Pallas

IPC: H04W28/10 ,  H04W28/02 ,  H04L12/893 ,  H04L12/801

Abstract: Disclosed is a method includes treating, at an access point, a data flow between a first station and a second station during a first period of time as a non-fast flow. After a condition is met, the method includes marking the data flow as a fastACK flow during a second period of time and during the second period of time, storing data frames in the data flow at the access point to yield stored data frames. Next, the method includes generating a spoofed TCP acknowledgment signal on behalf of the first station and associated with the stored data frames and transmitting the spoofed TCP acknowledge signal to the second station.

公开(公告)号：US10341908B1

公开(公告)日：2019-07-02

申请号：US15909823

申请日：2018-03-01

Applicant: Cisco Technology, Inc.

Inventor： Apurv Bhartia ,  Lizhen Lin

IPC: H04W12/04 ,  H04W36/00 ,  H04W36/02 ,  H04W36/08 ,  H04W36/18 ,  H04W36/30

Abstract: A wireless network system that provides for seamless roaming of client devices is described. The wireless network system includes a plurality of access points. One access point is designated as the primary access point that is responsible for handling encrypted communication with the client device. The primary access point has access to the necessary encryption key(s) for encrypted communication. The primary access point receives broadcast updates from the other access points that includes connection scores. When a connection score for a second access point exceeds the connection score of the current primary access point, the current primary access point designates the second access point as the new primary access point and sends the new primary access point the encryption key(s) for encrypted communication. The handoff is seamless and does not require a new handshake between the new primary access point and the client device.

公开(公告)号：US20180338269A1

公开(公告)日：2018-11-22

申请号：US15658197

申请日：2017-07-24

Applicant: Cisco Technology, Inc.

Inventor： Apurv Bhartia ,  Feng Wang ,  Derrick Pallas

IPC: H04W28/10 ,  H04L12/801 ,  H04W28/02

CPC classification number: H04W28/10 ,  H04L47/193 ,  H04W28/0289 ,  H04W84/12

Abstract: Disclosed is a method includes treating, at an access point, a data flow between a first station and a second station during a first period of time as a non-fast flow. After a condition is met, the method includes marking the data flow as a fastACK flow during a second period of time and during the second period of time, storing data frames in the data flow at the access point to yield stored data frames. Next, the method includes generating a spoofed TCP acknowledgment signal on behalf of the first station and associated with the stored data frames and transmitting the spoofed TCP acknowledge signal to the second station.