Microsoft Technology Licensing, LLC

Poovanpilli G Madhavan

Abhishek Abhishek

Sharad Mittal

Ankur Agiwal

Mohammad Shabbir Alam

Zhong Deng

Xinyan Zan

Victoria Marie Poncini

Frank Li

John-Paul M Stewart

Hui Shen

Jiandong Ruan

Amer A Hassan

Paramvir Bahl

Christian F Huitema

Craig J Mundie

William Jefferson Westerinen

Randall Edward Aull

Firdosh Kersy Bhesania

Pei Zheng

David A Roberts

Francis Duong

Mark E Maszak

A software architecture providing ad hoc wireless networking capabilities. The software architecture may be compatible with wireless devices, such as Ultra wideband (UWB) devices operating according to the WiMedia Logical Link Control Protocol (WLP). The software architecture may include user mode and kernel mode modules, and may include a multiplexing driver framework to enable system connection to multiple ad hoc networks.

Ad hoc wireless networking

A software architecture providing ad hoc wireless networking capabilities. The software architecture may be compatible with wireless devices, such as UWB devices operating according to the WLP communication protocol. The software architecture may include user mode and kernel mode modules, and may include a multiplexing driver framework to enable system connection to multiple ad hoc networks.

A wireless mesh network enables multiple devices near each other to transmit simultaneously, thus allowing increased network bandwidth. Prior to transmitting, a device may determine various parameters of the wireless medium on which it desires to transmit. For example, the device may determine whether the intended recipient device is close enough, and verify that any other transmitting and receiving devices are far enough away. If these or any other suitable criteria are met, the device can transmit simultaneously with other devices in the vicinity.

Wireless mesh networking with multiple simultaneous transmissions by nearby network nodes

A process for secure, safe, and easy provisioning of a wireless device with credentials to connect to a wireless network. A connecting wireless device and an established wireless device both utilize low power transmission at close proximity to exchange wireless connection setting information and/or a password. The connecting wireless device is moved into proximity with the established wireless device and a low power setting is discovered at which the wireless devices may communicate with a sufficiently low error rate. The proximity of the connecting wireless device to the established wireless device is verified and the connecting wireless device is then passed the secret information by the established network device.

Physical location verification

A software architecture providing ad hoc wireless networking capabilities. The software architecture may be compatible with wireless devices, such as ultra wideband (UWB) devices operating according to the WiMedia Logical Link Control Protocol (WLP) communication protocol. The software architecture may include user mode and kernel mode modules, and may include a multiplexing driver framework to enable system connection to multiple ad hoc networks.

A first connection is established between a first device and a host, wherein the first device is host-capable. A second connection is established between a second device and the host. Proxy association is performed between the first device and the second device by the host to associate the first and second devices, wherein the first and second devices are unable to directly associate, wherein the host passes association information between the first and second devices.

Proxy association for devices

Described is a determination of whether interference in a wireless network has achieved a threshold level that adversely impacts communication bandwidth. If so, action is taken to mitigate the effects of the interference and thereby improve the bandwidth. The action that is taken may be in the form of at least one mitigation solution, including mitigating by packet fragmentation, mitigating by changing the wireless network's current operating frequency, mitigating by changing a power level, mitigating by transmit dodging, and/or mitigating by pre-selecting at least one transmission criterion based on an observed pattern. A framework is provided to coordinate mitigation of interference-related problems, and includes an interferer decision mechanism that receives RF interference related-data and evaluates the interference data against a threshold. Mitigation is employed when the threshold is achieved on the current operating frequency.

Robust coexistence service for mitigating wireless network interference

Described is an architecture comprising a flexible and extensible framework embodied in a robust coexistence service that couples sensed RF spectrum (interference) data to modules that process the data into dynamic feedback information used to mitigate network communication problems caused by the interference. Via a driver, spectrum sensor hardware is connected to the framework running on a computing device, where the condition and quality of various wireless networking channels are assessed by external modules plugged into the framework. Modules comprise include a classifier component that examines the sensed-data and classifies it, and an application program that processes the classified data, possibly for mitigation. Mitigation-related information is fed to a feedback mechanism to adjust network parameters to avoid the sensed interference. The robust coexistence service also distributes control data corresponding to the mitigation information to other remote computing devices in the wireless network for use in mitigating their interference problems.

Extensible framework for mitigating interference problems in wireless networking

A mechanism is provided to extend the range of wireless devices beyond the range limit that results from timing restrictions imposed by the IEEE 802.11 standard. The mechanism, which operates at the upper level of the 802.11 MAC, determines whether the wireless devices are far apart or not far apart. When the wireless devices are determined to be far apart, the standard retransmission protocol at the lower level of the 802.11 MAC is disabled and a custom ACK packet is utilized. Delivery of a transmitted packet is confirmed if the custom ACK packet is received within a maximum delay period that takes into account the longer propagation delay between wireless devices that are far apart.

Range extension between two wireless devices

Described is a protocol by which wireless network communication devices comprising peer nodes (such as a computer system and an access point) cooperatively exchange information about RF interference detected in the network. The protocol administers the exchange of formatted control data corresponding to the detected interference among computing nodes running a service capable of processing the control data. A peer table is used to maintain locally-obtained and remotely-obtained control data. Records in the peer table are arranged with different levels of granularity with respect to interference and networking information. The interference information collected through the cooperative protocol may then be used by peer devices in the network to adapt to mitigate interference-related problems. The protocol also provides for discovery of peer node capabilities, including a negotiable transport for the control data that may be different from the main data channel transport.

Protocol for exchanging control data to mitigate interference problems in wireless networking

Described is a system and method for transporting interference-related control data and other information between nodes in a wireless network, using a control channel that is distinct from a content channel used to transport content. The control channel may be a different channel in the same unlicensed band as the content channel, a channel in a different unlicensed band, or a channel in a licensed band, and thereby not subject to the same interference-related problems that the unlicensed content channel may experience. As a result, management information for adjusting the content channel's communication parameters may still be communicated between the nodes, whereby mitigation actions may occur. For example, the content channel may be changed to another frequency, compression may be implemented or varied, and/or the data transfer rate may be varied. The control data can also be used to change the control channel's communication parameters.

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Bellevue, WA, United States of America

Poovanpilli G Madhavan