Cisco Technology, Inc.

Other

Samsung Electronics Co., Ltd.

Lu Qian

Brian Donald Hart

David Sheldon Stephenson

Bretton Lee Douglas

Johannes Petrus Kruys

Neil Robert Diener

Sandeep Shetty

David McClead Theobold

Rajneesh Kumar

Predrag Tosic

Chiu Ngo

Harkirat Singh

Robert B O'Hara, Jr

Patrice R Calhoun

Xiaohong Gong

Tak Ming Francis Pang

Douglas A Smith

Wenfeng Huang

James M Cisar

Michael E Lewis

James An

Sandeep Jay Shetty

A distributed, bi-directional congestion control and starvation avoidance system for wireless mesh networks. In particular implementations, the nodes of the wireless mesh network monitor their respective local buffers for traffic load, and signal upstream and downstream nodes in response to detected congestion or excess capacity to dynamically allocate transmit capacity between neighboring nodes. Particular implementations are capable of mitigating congestion and preventing starvation in a fully distributed, low-overhead, scalable and efficient manner.

Distributed bi-directional flow control in wireless mesh networks

A distributed, bidirectional congestion control and starvation avoidance system for wireless mesh networks. In particular implementations, the nodes of the wireless mesh network monitor their respective local buffers for traffic load, and signal upstream and downstream nodes in response to detected congestion or excess capacity to dynamically allocate transmit capacity between neighboring nodes. Particular implementations are capable of mitigating congestion and preventing starvation in a fully distributed, low-overhead, scalable and efficient manner.

A virtual network image system (VNIS) maintaining virtual counterparts for each of the entities in a real-world, physical wireless local area network (WLAN) to which the VNIS corresponds. The virtual counterparts operate in accordance with a communication protocol that corresponds to that of the WLAN and under the control of a VNIS manager component. The VNIS manager component predicts and optimizes operating configurations associated with the virtual counterparts, based on 'what-if' analyses, to provide automation of various services relating to the operation of the physical WLAN.

Virtual network image system for wireless local area network services

Reducing latencies for content protection in audio/video networks includes reserving a wireless channel for a time period to accommodate control message exchange for content protection in data communication between a wireless transmitter and wireless receiver over a wireless channel. The control message exchange includes wirelessly transmitting a control request message from the transmitter for content protection to the receiver, and transmitting a control response message from the receiver to the transmitter in reply. Reserving the wireless channel includes reserving the wireless channel for a time period that accommodates the control message exchange. The time period includes a single transmission opportunity period for communication on the wireless channel, to reduce latency for the control message exchange between the transmitter and receiver.

Method and system for minimizing latencies for content protection in audio/video networks

In accordance with an example embodiment, there is disclosed herein an apparatus where transmitter operating parameters are adjusted based on channel condition data obtained from a transmitter and/or from a receiver communicating with the transmitter. For example, the transmitter's contention window may be increased responsive to determining channel occupancy at the receiver is increasing. As another example, aggregation/fragmentation may be adjusted based on channel occupancy at the receiver. Still another example, the data rate employed by the transmitter may be changed responsive to changes in receiver success count.

Adaption of medium access and transmission parameters for wireless networks

A packet aggregation system. In particular implementations, a method includes accessing one or more transmit queues, each corresponding to a wireless client associated with a given wireless mesh access point of a plurality of mesh access points. The method further includes selecting a mesh access point of the plurality of mesh access points and selecting a transmit queue corresponding to a wireless client associated with the selected mesh access point. The method further includes aggregating packets that are destined for the selected wireless client, up to a size limit, taking into account the path to the selected mesh point as well as quality of service constraints, and composing and transmitting the aggregated packet to the selected mesh access point.

End-to-end packet aggregation in mesh networks

A method for sending a multi-rate multi-receiver message containing a multi-receiver multi-response aggregate. The multi-rate multi-receiver aggregate is transmitted until a multi-receiver multi-response aggregate embedded within the multi-rate multi-receiver aggregate is encountered. Transmission of the multi-rate multi-receiver aggregate is suspended for a predetermined time period. After the expiration of the predetermined time period, transmission of the multi-rate multi-receiver aggregate resumes.

Multi-rate multi-receiver multi-response aggregation

Techniques are provided herein for computing a video admission control metric used to determine whether to admit a new video stream to a wireless network. The video admission control metric is computed using several measurable parameters of the wireless network. The dynamic nature of this process takes into account many real-time factors that affect admission control, such as traffic load, channel conditions, and overlapping basic service set (BSS) interference.

Dynamic admission control of wireless video to a wireless network

Techniques are provided to reduce contention (interference) between bursts associated with multiple isochronous traffic flows. Generally, the techniques involve, at a plurality of wireless access point devices and/or a plurality of wireless client devices in a wireless network, initiating bursts of wireless transmissions carrying isochronous traffic from wireless access point devices to their associated client devices and/or from wireless client devices to their respective wireless access point devices at start times that are scheduled so as to reduce a likelihood of interference between multiple bursts of wireless transmissions for different isochronous traffic flows.

Scheduling of isochronous traffic in time and frequency to reduce contention

A load balancer is provided for balancing distribution of wireless clients among wireless access points. The load balancer includes a tracking implementation for tracking at least one telemetry parameter of each wireless client's wireless link with each respective wireless access point. A goal implementation is included for comparing one or more telemetry parameter against at least one predetermined goal to obtain a fitness measure. A control implementation is also provided for varying the operation of at least one of the respective wireless access points and wireless clients in response to the fitness measure, so as to balance the distribution of load among the respective wireless access points.

Wireless network self-adaptive load balancer

In one embodiment, a method includes scheduling acknowledgements from a plurality of receivers in a wireless network, transmitting an acknowledgement schedule to the receivers, broadcasting or multicasting data to the receivers, processing acknowledgements received from receivers, and retransmitting at least a portion of the data to one or more of the receivers if an acknowledgement is not received from the one or more receivers. An apparatus for broadcasting or multicasting data in a wireless network is also disclosed.

Broadcast and multicast transmissions with acknowledgement scheduling

A method of rate shifting specially suited for the voice traffic, which differentiates poor channel conditions from a heavily loaded channel of a WLAN and adapts to the network traffic condition and channel condition promptly with low rate of false shifting. Determining when to rate shift is based on a combination of the received signal strength indication and the retry rate.

System and method for rate shifting for wireless VoIP

A technique for multiple receiver aggregation that allows for multiple immediate responses of acknowledgements or block acknowledgements. The technique uses a spoofed network allocation vector (NAV) implemented within an aggregate's PLCP header to protect the aggregate and all of the immediate responses from multiple receivers. The immediate responses are scheduled, the information indicating the scheduled offset time and granted transmission duration for response of each receiver being included in the physical sublayer data unit (PSDU) headers within the aggregate.

Multiple receiver aggregation

In one embodiment, a method includes receiving a call admission request; in a first state, applying a first call access control (CAC) algorithm to the call admission request; in a second state, applying a second CAC algorithm to the call admission request; and transition between the first state and the second state based on at least one attribute of a radio frequency (RP) environment.

Finite state machine of traffic stream metrics for adaptation of load-based call admission control in wireless networks

In an example embodiment, an aggregate frame, such as a A-MSDU aggregate is generated from interleaved frames addressed to various receiver addresses. The incoming frames are regrouped by receiver address. The aggregate frame is generated from the regrouped frames.

Growing community of inventors

Solon, OH, United States of America

Lu Qian