Cisco Technology, Inc.

Cisco Systems Wireless Networking (Australia) Pty Limited

Other

Brian Donald Hart

David Stuart Kloper

Matthew Aaron Silverman

Paul Jeffrey Stager

Pooya Monajemi

Santosh Ghanshyam Pandey

Bretton Lee Douglas

Malcolm Muir Smith

John D O'Sullivan

Gautam Dilip Bhanage

Vishal Satyendra Desai

Philip J Ryan

Jerome Henry

Ahmadreza Hedayat

Raghuram Rangarajan

Daniel Joseph Lyons

Jiunming Huang

Ardalan Alizadeh

Allan Thomson

Benjamin Jacob Cizdziel

Andrew Frederick Myles

Mithat C Dogan

Andrew Robert Adams

Jason R Crawford

David Sheldon Stephenson

Douglas Chan

Jie Cheng Jiang

Milind Paranjpe

Kevin C H Wong

Eldad Perahia

Rajesh S Pazhyannur

Fred Jay Anderson

Neil Robert Diener

Xiaohong Gong

Lu Qian

David McClead Theobold

Qing Zhao

James A Amos

Zhigang Gao

Anand K Oswal

John Matthew Swartz

Arun G Khanna

David J Pignatelli

Robert B O'Hara, Jr

Khashayar Mirfakhraei

Xu Zhang

Christopher Graham Meil

Richard A Keaney

Venkataprasad Chirreddy

Dan Lyons

Uri Parker

Kurt A Lumbatis

Peiman Amini

Robert E Barton

Sudhir Kumar Jain

Allen Huotari

Abhijit Kumar Choudhury

Indermeet Singh Gandhi

Timothy S Olson

Santosh Babaji Kulkarni

Stephen Michael Orr

Glendon Leo Akins, Iii

Mansoor Ahmed

Genyuan Wang

Dipankar Bhatt Acharya

Rong Peng

Sanjay Kishore Katabathuni

Sujai Hajela

Edward Frederick Wright

Igal Gutkin

Emilio Maldonado

Pascal Thubert

Hang Jin

Norman William Finn

Vikram Chandrasekhar

Gary L Sugar

Domenico Ficara

Robert J Friday

Binita Gupta

Amine Choukir

Mukesh Taneja

Rohit Kumar Suri

Manoj Gupta

Johannes Petrus Kruys

Xiaoli Ma

Tak Ming Pang

Mark Krischer

David S Goodall

Amir Hosein Kamalizad

Bhautik Doshi

Kasi Nalamalapu

Alex C K Lam

Joshua David Suhr

Jagdish Girimaji

Ender Ayanoglu

Huaiyi Wang

Mohammad Janani

Christopher Sean Johnson

Kayshav Dattatri

Greg Corsetto

Fine Time Measurement (FTM) Location Configuration Information (LCI) protection and, specifically, FTM LCI protection with authentication and selective client enablement may be provided. To perform FTM LCI protection, a controller may first obtain a key-pair including a public key and a private key from a Certificate Authority (CA). The controller my determine a venue location where an Access Point (AP) is located. The controller may send a Certificate Signing Request (CSR) with the venue location to the CA. In response to sending the CSR, the controller may receive a public key certificate from the CA, wherein the public key certificate includes the venue location. The AP may receive a request for Location Configuration Information (LCI) from a Station (STA), wherein the LCI includes an AP location. The AP creates a hash of LCI of the AP using the private key and sends the LCI and the hash to the STA.

Fine time measurement location configuration information protection

A preemption service in a wireless network is described. The preemption network increases the reliability of preemption traffic to be quickly delivered over the wireless network. The active preemption service in wireless networks causes the devices in a wireless network to enter a low transmit power state where every device transmits at a power lower than a high or maximum transmission power. Preemption traffic is transmitted from authorized devices at a high or maximum power, over the lower power transmissions, in order to provide an increased guarantee that the preemption traffic will arrive at the intended recipient.

Preemption via low and high power states in a wireless network

Techniques for wireless device roaming are disclosed. These techniques include identifying a wireless client entity for roaming from a first infrastructure entity to a second infrastructure entity. The techniques further include agreeing, between the client entity and the first infrastructure entity, on one or more roaming conditions defined using transition parameters for transition of a first data flow for the client entity from the first infrastructure entity to the second infrastructure entity, the one or more transition parameters including a sequence number relating to the dataflow. The techniques further include determining that a first condition defined in terms of a transition parameter of the agreed one or more roaming conditions is met, and, based on the determining, transitioning from providing the first dataflow from the first infrastructure entity to the client entity to providing the first data flow from the second infrastructure entity to the client entity.

Orchestrated roaming point

Disclosed herein are a system and method for efficiently routing high-priority frames through a wireless network based on markings of the frames by a data link layer, a network layer, or an application layer in a five-layer protocol stack. When a real-time application, such as a video or gaming application, is to be sent to one or more stations in the wireless network, the access point determines the strategy for routing the high-priority frames based on the markings received from the data link, network, or application layer. Strategies include discarding non-I frames when there is congestion in the wireless network, replicating I-frames to assure reliable delivery to the stations, scheduling I-frames with preference, and moving I-frames ahead in a buffer in the access point.

Quality of service enhancements for video and extended reality applications over wireless networks

A system includes a memory and a processor communicatively coupled to the memory. The processor, in response to determining that a first number of transmissions over a first link with a first frequency has failed, selects a second link with a second frequency for transmission. The second frequency is lower than the first frequency. The processor also, in response to determining that a second number of transmissions over the second link has failed, one or more of (i) stop the transmissions over the second link or (ii) begins transmissions over a third link with a third frequency. The second number is greater than the first number.

Link coordination in multi-link devices

A method is provided in which an AP of a MLD AP device may decide to include all out-of-link BSS parameters updates in a beacon frame (beacon). A flag is included in the beacon frame to indicate that all updates are included in the beacon frame and thus the client device that receives the beacon frame should not send probe request frames (probe requests) to obtain these updates. Thus, a non-AP MLD that receives a beacon frame with the above indication and that has all critical BSS parameters corresponding to the Change Sequence Number (CSN) that preceded the updates indicated by the AP, should not send probe requests to obtain the updated parameters. The number of bits to assign to the complete BSS Update Report Indication flag may vary depending on the number of updates to be reported.

Complete basic service set (BSS) update report indication for multi-link device (MLD) access points

Differential time synchronization and scheduling may be provided. A first Access Point (AP) may wirelessly receive time-base translation parameters of a second AP. The first AP and the second AP may be neighboring. Next, a first transmission schedule for the first AP and a second transmission schedule for the second AP may be maintained. Then the second transmission schedule for the second AP may be translated into a time-base of the first AP based on the time-base translation parameters of the second AP. Then the first AP may transmit based upon the first transmission schedule for the first AP and the translated second transmission schedule for the second AP.

Differential time synchronization and scheduling

Seamless client roaming for Multi-Link Device (MLD) clients may be provided. First, a Traffic Identifier (TID)-to-link map may be established by an Upper Service Access Point (U-SAP) of a multi-AP MLD entity that assigns subsets of TIDs to at least two links of the entity. For example, a client device logically associates with the U-SAP, while the client device physically connects to a first and second AP of the entity on a respective first and second link, where the first and second AP include first and second Lower Service Access Points (L-SAPs) and are non-collocated. Next, using the map, data received at the U-SAP is directed over one of the two links for transmission to the client device. Further, frame aggregation and block acknowledgment functions may be performed by one of the first or second L-SAP based on whether data transmission is over the first or second link.

Multi-link operation with localized performance of B-ACK functions

Secure device location sharing may be provided. Over a secured link, an indication that a peer-to-peer device desires Automated Frequency Coordination (AFC) based location sharing may be received. Then, from the peer-to-peer device over the secured link, an identity provider (IdP) may be received for the peer-to-peer device. Next, validation of the peer-to-peer device may be requested from the IdP. From the IdP in response to requesting validation of the peer-to-peer device from the IdP, authentication for the peer-to-peer device and an indication that the peer-to-peer device needs AFC based location sharing may be received. An indication that the peer-to-peer device is approved for AFC based location sharing may then be sent to the peer-to-peer device over the secured link.

Secure device location sharing

Signal to Interference and Noise Ratio (SINR) estimation, and more specifically providing SINR estimation during Legacy Long Training Field (LLTF) accounting for Inter Symbol Interference (ISI) may be provided. SINR estimation may include receiving a Physical Layer Protocol Data Unit (PPDU) including a LLTF and extracting groups of transmission symbols from the LLTF. Next, groups of fragmented symbols may the groups of transmission symbols. One or more Sum of the Squared Magnitudes (SSM) may be determined, such as an SSM of the total signal, an SSM of the signal without ISI and/or noise, an SSM of ISI, an SSM of noise. Finally, SINR may be estimated using one or more SSMs (e.g., the SSM of noise, the SSM of signal, and the SSM of ISI).

Signal to interference and noise ratio estimation

Signaling Multi-Link Device (MLD) capabilities is provided. Signaling MLD capabilities can comprise maintaining, by a non-Access Point (AP) Multi-Link Device (MLD), an association with an AP MLD, the association comprising one or more setup links between the non-AP MLD and the AP MLD, each setup link established between an affiliated non-AP station (STA) of the non-AP MLD and an affiliated AP of the AP MLD. To add a link, the non-AP MLD generates and transmits to the AP MLD a Link Reconfiguration Request frame comprising a Reconfiguration Multi-Link element with one or more subfields, including an Extended MLD Capabilities and Operations subfield, comprising data indicating MLD capabilities of the non-AP MLD. Responsive to receiving a Link Reconfiguration Response frame indicating a success from the AP MLD, the non-AP MLD adds the link to the one or more setup links of the association between the AP MLD and the non-AP MLD.

Signaling multi-link device capabilities

Disclosed are systems, apparatuses, methods, and computer-readable media for identifying a location of a wireless device. A method for identifying a location of a wireless device includes transmitting a request message to the wireless device for identifying a position of the wireless device; receiving a response message from the wireless device; determining first time information based on a time of flight (ToF) of the request message and the response message, wherein the ToF corresponds to a distance of the wireless device from the AP; receiving a second message from a second AP that includes second time information associated with the request message and the response message; receiving a third message from a third AP that includes third time information associated with the request message and the response message; and transmitting location configuration information to the wireless device for the wireless device to determine a position of the wireless device.

Estimating position from reference signals received by coordinating access points

A format for a Physical layer Protocol Data Unit (PPDU) that can be transmitted over a network is disclosed. The PPDU includes one or more bits signaling that vendor-specific (VS) per-user content is present in the PPDU. The PPDU also includes one or more bits signaling a VS language in which the VS per-user content is presented. The PPDU further includes bits representing the VS per-user content in the VS language. The VS per-user content is arranged in the PPDU to provide individualized VS information for respective users intended to receive the PPDU.

PPDU format supporting vendor specific per-user parameters

The present disclosure is directed to simultaneous channel sounding on multiple MLO channels followed by determining phase and amplitude corrections based on channel impulse responses obtained on each MLO channel. The corrections are then used in subsequent extrapolation of channel sounding on one channel to another. In one aspect, a method includes transmitting, on each radio interface of a first multi-link device, a corresponding sounding probe to a second multi-link device; determining, by each radio interface of the first multi-link device, a corresponding channel impulse response based on the corresponding sound probe to yield a plurality of channel impulse responses; determining an offset between the plurality of channel impulse responses; and using the offset during a subsequent extrapolation of a sounding probe on one radio interface to a second radio interface of the first multi-link device.

Phase lock loop phase ambiguity mitigation for multi-link operation extrapolated sounding

Growing community of inventors

San Jose, CA, United States of America

Brian Donald Hart