Amazon Technologies, Inc.

Broadcom Corporation

Jin Guo

Milos Jorgovanovic

King Shaw

Shengwei Zhang

Binh Quoc Tran

Thomas W Kuehnel

Ashish Kumar Shukla

Morris Yuanhsiang Hsu

QingYun Wei

Wentian Cui

Jay William Kruse

Omar Abdul Baki

Alexander Feldman

Yan E Wang

Chandrasekaran Sakthivel

Qinghai Gao

Pratik Kalpesh Patel

Shao-Cheng Wang

Li Li

Yi Zhu

Jay Praful Desai

Ateet Kapur

Zhen Xie

Derek John Foster

Nunfang Hu

A system in which a device may automatically provision another device with credentials, at the behest of a cloud-based service, based in part on the physical proximity of the device to be provisioned. The provisioning device and the device to be provisioned may use a radio access technology (RAT) with a limited radio range. Account information associated with the device to be provisioned is known to the cloud-based service, which authenticates the device to be provisioned via the device with credentials.

Cloud-based provisioning using peer devices

A softAP bridge is created to support a mesh network that also works seamlessly with any home Wi-Fi AP routers by using Layer-3 techniques to simulate a Layer-2 bridge. With this softAP bridge, Wi-Fi chipsets with integrated special Wi-Fi MAC Layer-2 mesh network support (e.g., 802.11s), or external gateway hubs, are not required. To accomplish this solution, one of the wireless capable devices may be designated as a relay device for communicating data packets between a home AP router and the remaining wireless capable devices that are designated as client devices.

Wireless mesh network implementation for IOT devices

Described are techniques for distributing audio data to multiple audio devices for generation of a synchronized audio output. A master device may receive audio data from a content server or other remote data source and store the audio data in a local cache. The master device may provide the audio data to multiple slave devices using a single multicast transmission. In some cases, the master device may also provide the audio data to individual slave devices unable to receive the multicast transmission using a network connection. Each slave device may store the audio data in a local cache. To generate the audio output, each audio device may retrieve the audio data from the associated local cache, which may enable the audio data to be distributed without modifying the commands used by audio applications to generate the audio output.

System for distributing audio output using multiple devices

Described are techniques for modifying the data rate used to transmit audio data from a master device to slave devices. After receiving a signal, each slave device requests transmission of one or more packets and reports an individual error rate. A cumulative error rate may also be determined based on the individual error rates and the retransmission requests. If any individual error rate or the cumulative error rate exceeds a maximum threshold, the data rate used to transmit the audio data is decreased. If an individual error rate is less than a minimum threshold, the data rate may be increased. If an error rate exceeds a critical threshold, the data rate may be reduced to a minimum value supported by the devices.

System for modifying data rates used by audio devices

Described are techniques for configuring a selected audio device of a group of audio devices to send audio data to multiple other devices to enable the devices to provide a synchronized audio output. Link quality values indicative of the quality of communication links between audio devices and an access point and between different audio devices may be used to form subsets of devices in which a first master device receives audio data from a data source, provides data to other master devices via the access point. A value indicative of the airtime that would be used to communicate data to other audio devices may be determined for at least a portion of the audio devices. Additional subsets of audio devices may be formed if the airtime for the existing subset does not exceed a maximum quantity of airtime.

System for distributing data to multiple devices

Described are techniques for configuring a group of audio devices in communication with an access point to provide an audio output. Values indicative of the data throughput for communication between each audio device and the access point may be determined. The audio device having the greatest data throughput value may be designated as the master audio device. A value indicative of the airtime that would be used to distribute audio data using to the group of audio devices using the designated master audio device may be determined based on the data throughput values associated with each audio device. If the airtime value is less than a threshold airtime value, the audio data may be provided to the audio devices. If the airtime value exceeds the threshold airtime value, a notification may be generated indicating the relationship between the airtime value and the threshold airtime value.

System for configuring distributed audio output using an access point

Described are techniques for configuring a group of devices to distribute and receive data in a manner that reduces consumption of network resources. A larger group of devices may be divided into subsets of devices, each subset including a master device that provides data to multiple slave devices via a multicast transmission. A master device may be determined based on the respective signal quality between the audio devices and an access point, and the number of other audio devices to which each respective audio device may provide data. Other devices having respective signal quality for communication with the master device that exceeds a threshold may be designated as slave devices. Once a first subset is formed, the remaining devices may be grouped into additional subsets. Remaining devices that are not a part of any subset may receive data via communication with an access point.

System for configuring audio devices to distribute audio data

Described are techniques for configuring a group of devices to perform a function by using a master device to provide data to other devices within the group. Test data may be communicated between a selected device and each device in the group to determine link quality values for each communication. A value indicative of the airtime that would be used to distribute data using the selected device may be determined. This process may be repeated for each device within the group. The selected device associated with the lowest airtime value may be designated as the master device. Data transmitted from the master device to the other devices may be used to cause the group of devices to perform a function.

System for distributing data using a designated device

A group of computing devices use a wireless channel for communication, resulting in congestion. Within that group, some devices may need to exchange time sensitive application data, such as data indicative of control inputs received from a user. A destination device may transmit a clear to send (CTS) frame over the channel that indicates a CTS interval indicative of a time to suspend transmission. Other computing devices respond to the CTS frame by suspending transmission for the specified CTS interval. However, a source device in the group of many computing devices receives the CTS frame and initiates transmission of application data instead of suspending transmission. As a result, the source device transmits while other computing devices are not transmitting. In some implementations a beacon frame may be transmitted before a CTS frame. The destination device may confirm receipt of the application data by transmitting an acknowledgement to the source device.

System to facilitate data transfer in wireless networks

Described are techniques for configuring a group of audio devices to provide a synchronized audio output. Values indicative of the data throughput for communication between each audio device and the access point and between the audio devices themselves may be determined. A value indicative of the airtime that would be used to communicate data to other audio devices, via a multicast transmission, may be determined for at least a portion of the audio devices. Based on the airtime values, the audio devices may be divided into subsets, each including a master device configured to provide data to one or more slave devices via a multicast transmission. A global master device that receives audio data from a data source and provides the data to the other master devices may be selected based on the data throughput values for communication between each master device and the access point.

System for distributed audio output using designated audio devices

Techniques for harmonizing wireless communications performed by a computing device which communicates using varying wireless communication standards are described herein. For instance, a computing device may include multiple chipsets with associated antennas that are configured to perform wireless communications using separate wireless standards which operate at overlapping frequencies. To avoid performance degradation experienced in simultaneous use cases with communications operating at overlapping frequencies, the multiple chipsets may be configured with logic to determine which communications are prioritized when multiple chipsets attempt to communicate simultaneously. The multiple chipsets may be communicatively coupled to coordinate their communications by prioritizing certain types of communications over other types of communications to avoid simultaneous communications in overlapping frequencies. In this way, multiple chipsets that communicate using different standards at overlapping frequencies may avoid performance issues experienced in simultaneous use cases, while performing the communications which are of a highest priority level.

Next packet protection for communications in overlapping frequencies

Devices, systems and methods are disclosed for allowing a mobile device to roam from a first frequency band to a second frequency band for a dual band access point when a signal strength associated with the first frequency band improves. For example, the mobile device may store a first signal strength associated with the first frequency band when the mobile device first connects to the first frequency band and may monitor subsequent signal strengths to determine if they exceed the first signal strength. When a subsequent signal strength exceeds the first signal strength, the mobile device may use this as an indication that the mobile device is closer to the access point and within range of the second frequency band. The mobile device may then detect and connect to the second frequency band.

Frequency acquisition during roaming

Approaches enable a device capable of wireless communication, such as a device having a wireless adapter, to automatically select and connect to an available wireless access point (AP) having favorable performance, security, and/or other attributes that may be ascertained through various parameters, despite the wireless AP not being the last-known and/or last-connected-to wireless AP. The wireless-enabled device may determine the wireless AP to connect to in a number of ways, such as by determining all available wireless APs in the vicinity of the device and identifying, ranking and/or scoring the parameters for some or all of the available wireless APs to determine a ranking of the wireless APs. Once a favorable wireless AP is identified, the device may automatically attempt to connect to the wireless AP. If the wireless AP is not available, the device may automatically attempt to connect to the next wireless AP in the ranked list, etc.

Automated wireless access point selection

Devices, systems and methods are disclosed for enabling a device to act as a wireless extender and adaptively control a transmission power for capability messages. For example, when the device has the capability to relay traffic without affecting a local processing of the device, the device may transmit capability messages at a normal transmission power and may relay traffic between a network device and clients. However, when the device no longer has the capability to relay traffic without affecting the local processing, the device may transmit capability messages at a reduced transmission power. As clients use the capability messages to determine a signal strength of an access point, the reduced transmission power results in the device appearing to have a lower signal strength and thus decreases a desirability of the device as an access point.

Growing community of inventors

Cupertino, CA, United States of America

Jin Guo