Cisco Technology, Inc.

Michael Anthony Ramalho

Mihailo Zilovic

James C Frauenthal

Gary Skrabutenas

Ramanathan T Jagadeesan

Bich Nguyen

Greg Harald Hakonsen

Jonathan David Rosenberg

David R Oran

Wai-Tian Tan

Ali C Begen

William C Ver Steeg

Paul G Bright-Thomas

Paul Edwin Jones

Ragnvald Balch Barth

Michael P Dimitroff

Knut Inge Hvidsten

James E Coffman

Geir Sandbakken

Tankut Akgul

Mohamed Kamel Zanaty

Shmuel Shaffer

Daniel George Wing

Shantanu Sarkar

Keith Griffin

Toerless Eckert

Steven L Christenson

Matthew Kuhlke

Michael P O'Brien

Marcello Caramma

Niall L McDonnell

Jon Michael Snyder

Liam Frawley

Martin Bernard Feeney

Todd C Tatum

Laurent Kim-Huy Pham

Darrin Hobson Simmons

David A Benham

Kashyap Kodanda Ram Kambhatla

William Geoffrey Prior

John George Apostolopoulos

Flemming Andreasen

Xiaoqing Zhu

William C VerSteeg

Herbert Michael Wildfeuer

Randall R Stewart

Alan Darryl Gatzke

David C Lee

Fadi Ramzi Jabbour

Peter Lei

Vikas Vashisht

Andrew C Chung

Ethan Hugg

Dan Tan

Eric H Lee

Ashish Khisti

Paul M Dunn

Chin-Ju Chen

Bill Versteeg

Tyrone Terry Thorsen

Joseph Roy Stone

Brian Davis

Brian A Apgar

Ahmed Badr

Eric Heng Chih Lee

Jim Frauenthal

Dario De Santis

John Arsenault

Bich Tu Nguyen

Bich T Nguyen

Methods and systems are disclosed wherein TCP may approximate Reliable Transport Protocol (RTP) or UDP delivery for real-time video/data conferencing applications that have long RTT connections.

Timely delivery of real-time media problem when TCP must be used

A first endpoint generates an acoustic spread spectrum signal including a pilot sequence and a data sequence representing a token synchronized to the pilot sequence, transmits the acoustic spread spectrum signal, and records a transmit time at which the acoustic spread spectrum signal is transmitted. A receive time at which a second endpoint received the acoustic spread spectrum signal transmitted by the first endpoint is received from the second endpoint along with an indication of a second token as recovered from the received acoustic spread spectrum signal by the second endpoint. A separation distance between the first endpoint and the second endpoint is computed based on a time difference between the transmit time and the receive time. The first endpoint is paired with the second endpoint when the token matches the second token and the computed distance is less than a threshold distance.

Endpoint proximity pairing using acoustic spread spectrum token exchange and ranging information

The present technology can receive audio segments from sources within one or more conference room, and can create audio fingerprints from the sources. The audio fingerprints are optimized for audio in conference room environments, which include distortions from room impulse responses, and various encoding used by telecommunication networks. In some embodiments, when two audio segments are matched, a user equipment can be instructed to mute its speakers to avoid feedback. In some embodiments, when two audio segments are matched, a user equipment can be given instructions to join a conference taking place in the room in when the audio segment originated.

Audio fingerprinting for meeting services

A method is described and in one embodiment includes receiving at a first node in a communications network a Session Traversal Utilities for Network Address Translation ('STUN') message associated with a first flow, wherein the STUN message comprises a flow attribute including corresponding to the first flow; analyzing the flow attribute at the first node; setting policy corresponding to the first flow in the network based on the analyzing, wherein setting the policy includes using the flow attribute of the STUN message to configure a network path for the first flow in the communications network; and forwarding the STUN message to a next network node.

Techniques for informing communications networks of desired packet transport treatment

The present technology pertains to a voice assistant configured for use in a meeting room environment where the voice assistant can learn speech parameters for a meeting taking place in the meeting room environment. The voice assistant can use the speech parameters to deliver proactive notifications in a manner that is less intrusive to the conversation in the meeting.

Conversation aware meeting prompts

Provided is a heterogeneous network of independently provided system components for detecting and verifying time and location of endpoints. In one aspect, a method includes receiving, at a first network component and from a second network component, a set of instructions for generating tokens in association with an application service; generating, at the first network component, the tokens based on the set of instructions; transmitting, by the first network component and according to the set of instructions, one or more of the tokens to one or more proximity emitter devices; receiving, from a user device, a message including a token received by the user device from at least one of the one or more proximity emitter devices; and validating the token to confirm that the token is from among the tokens generated by the first network component, the validation allowing the user device access to the application service.

Systems and methods for providing proximity as a service in a heterogeneous network of independent system components

Doppler correlators are configured to receive samples of a signal sampled based on a frequency. Each Doppler correlator includes successive butterfly elements. Each butterfly element includes cross-coupled first and second branches that include a sample delay that doubles for each successive butterfly element, and a sample inversion selectively placed in one of the first and second branches to encode into the successive butterfly elements of each Doppler correlator the same code sequence. Each Doppler correlator is configured with a respective phase rotation that varies across the Doppler correlators. Each Doppler correlator is configured to correlate the samples against the code sequence and apply the respective phase rotation to the samples as the samples are shifted through the successive butterfly elements, to produce respective correlation results from each Doppler correlator centered on a respective frequency offset from the frequency that varies across the Doppler correlators based on the phase rotations.

Efficient handling of clock offset in spread spectrum decoders

A method is described and in one embodiment includes receiving at a first node in a communications network a message associated with a first flow, wherein the message comprises a flow treatment attribute including metadata indicative of how the first flow should be treated in the network; analyzing the flow treatment attribute at the first node; setting policy for treatment of the flow in the network based on the analyzing; and forwarding the message to a next network node.

In a transmit method, a set of data eigenvectors that are based on a Prometheus Orthonormal Set (PONS) code construction and orthogonal to each other are stored, wherein the data eigenvectors are mapped to unique multi-bit words. A pilot sequence representing a pilot eigenvector that is based on the PONS code construction and orthogonal to each of the data eigenvectors is generated. Input data are grouped into multi-bit words and data eigenvectors among the data eigenvectors are selected based on the multi-bit words. A spread data sequence including the selected data eigenvectors and that is synchronized to the pilot sequence is generated. An acoustic signal including the synchronized pilot sequence and the spread data sequence is generated. The acoustic signal is transmitted.

Spread spectrum acoustic communication techniques

Time-offset, time-overlapping signals are received. The signals each include a pilot code, and at least some of the signals each include a user code occupying a time slot time-synchronized to a respective pilot code. Time-offset cross-correlation peaks for respective ones of the pilot codes are generated, each cross-correlation peak indicating a respective one of the time slots. For each time slot a respective projection vector including user code projections each indicative of whether a respective user code of known user codes is present in the time slot is generated. Particular ones of the projection vectors are selectively combined into an aggregate projection vector of aggregate user code projections, such that the aggregate projection vector has a signal-to-noise ratio (SNR) greater than the projection vectors individually. The user code is selected from among the known user codes based on the aggregate user code projections of the aggregate projection vector.

Adaptive decoding of spread spectrum signals using multiple correlator peaks

An endpoint device receives a sequence of audio frames. The endpoint device determines for each audio frame a respective importance level among possible importance levels ranging from a low importance level to a high importance level based on content in the audio frame indicative of the respective importance level. The endpoint device associates each audio frame with the respective importance level, to produce different subsets of audio frames associated with respective ones of different importance levels. The endpoint device, for each subset of audio frames, applies forward error correction to a fraction of audio frames in the subset of audio frames, wherein the fraction increases as the importance level of the audio frames in the subset increases, and does not apply forward error correction to remaining audio frames in the subset.

Audio frame labeling to achieve unequal error protection for audio frames of unequal importance

In one embodiment, a device in a network sends a long term reference frame of a video stream to one or more nodes in the network using a reliable transport mechanism. Subsequent to sending the long term reference frame, the device sends a sequence of regular frames of the video stream to the one or more nodes using an unreliable transport mechanism, whereby a frame in the sequence is derived from a directly prior frame in the sequence. The device identifies an expiration of a wait time from when the long term reference frame was first sent. The device sends a regular frame derived from the long term reference frame via the unreliable transport mechanism after the expiration of the wait time and subsequent to sending the sequence of regular frames.

Large scale media switching: reliable transport for long term reference frames

Growing community of inventors

Sarasota, FL, United States of America

Michael Anthony Ramalho