Meshnetworks, Inc.

Xg Technology, Inc.

Motorola Solutions, Inc.

Motorola Corporation

Elektrobit Oy

Ipr Licensing, Inc.

Pertti O Alapuranen

John M Belcea

Avinash Joshi

Robin U Roberts

Michael L Johnson

Eduardo Lorenzo-Luaces

Shyamal Ramachandran

Kevin L Farley

Donald L Joslyn

Pankaj Aggarwal

Sreekant Nair

Torsti Poutanen

Guénaël T Strutt

Jinu Kurian

Juha Meinilä

Gu&eacute;na&euml;l T Strutt

Brad Rainbolt

James A Proctor

A cognitive radio scanning method is disclosed that enables cognitive radios to rapidly scan for neighboring channels by staggering the position of beacons across the frame relative to other channels and intelligently allocate the bandwidth across super frames such that a device has the ability to switch and scan multiple beacons both within and across multiple super frames.

Method to enable rapid scanning by cognitive radios

A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built in slot reservation algorithm.

Cognitive mobile time division duplex Ad-Hoc network

This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the well-known LMS solution of W=(AA)*d that is computed from received multi antenna and multicarrier signals in a novel way.

Interference rejection method based on multiple sub-band projections

A system and method for enabling voice and broadband data delivery to users in expeditionary deployments is disclosed. More specifically the system is composed of a registration server, a wireless telco network server, a wide area transport network, and an external network interconnect (like satellite or fiber location) such that when users arrive at a disaster scene where communications infrastructure has been destroyed or is unavailable, they are either handed a smart device (smartphone, laptop, tablet, etc.) or they utilize an existing smart device they brought with them (BYOD) and via the Wi-Fi interface they connect to the wide area transport network.

System for automatic registration of expeditionary telecommunications deployments

The invention disclosed in this application describes a diversity combiner that operates as a maximal ratio combiner (MRC) when no interference is detected and as a selection combiner when Orthogonal Frequency Division Multiplexing symbol errors are detected with high probability by using a symbol error detection method based on computing a symbol by symbol path error metric.

Orthogonal frequency division multiplexing symbol diversity combiner for burst interference mitigation

A cognitive radio signal processing method suitable for single receiver devices where interference is mitigated using projection of received multi-dimensional signal space to maximize SNR by orthogonalizing interference is described. The method is based on a well-known LMS solution that is computed from received multi antenna and multicarrier signals in a novel way. This method solves the requirement of multiple RF chains in low cost handsets by introducing a protocol synchronous antenna switcher that allows, for example, a LTE handset with a single antenna to benefit from algorithms that typically require multiple receivers for the same frequency, i.e. MIMO.

Interference mitigation method for single or MIMO receiver devices

The invention disclosed in this application describes methods to coordinate spectrum measurement periods in access points or base stations in a time division duplex (TDD) system where the super frame is divided into uplink and downlink portions for use in cognitive radio systems.

Measurement coordination for dynamic spectrum access measurements in a time division duplex system

Techniques are provided for reliably distributing network management information in and ad hoc multi-hop wireless network which includes a number of existing nodes. A first node selects a particular timeslot in a dedicated channel based on the network management information received from the neighbor nodes and determines, via a contention channel, if the particular timeslot is being used by any neighbor nodes of the first node. If the particular timeslot is determined to be unused, then it is assigned to the first node for periodically transmitting network management information.

System, method and apparatus for reliable exchange of information between nodes of a multi-hop wireless communication network

The invention disclosed in this application describes an error detection method that can be used to identify an OFDM symbol that is interfered with. The method is based on computing a symbol by symbol path error metric from error correction code and by comparing the statistics of each individual symbol to the mean and the variance of the metric computed from the whole data packet.

Symbol error detection method

This invention describes a cognitive radio receiver architecture where multiple specialized receiver algorithms are executed in parallel. For example, maximal ratio combiner and beam forming algorithms may be running parallel. The receiver system computes solutions using different hypotheses of channel conditions and chooses the best result, i.e. is able to decode data from one of the parallel receivers.

Cognitive receiver architecture

A method of operation of a communication device. A first communication module is operatively coupled to a second communication module within the communication device. The second communication module is designed for carrier sensing. An instruction is communicated from the first communication module to the second communication module to begin sensing a channel on behalf of the first communication module. Next, the first communication module is informed of channel activity status by the second communication module. Thereafter, the first communication module transmits on the channel when no activity is detected on the channel.

Method and apparatus for operation of a communication device

A device and method enable reestablishing a wireless connection in a wireless network. A first wireless device detects that a previous wireless connection has been lost with a second wireless device that employs dynamic frequency selection (DFS). The first wireless device then uses a routing table to identify a third wireless device as a next hop of a route to the second wireless device, and transmits a request message to the third wireless device, where the request message requests identification of a current DFS channel over which the second wireless device is operating. Next, the first wireless device receives a response message from the third wireless device, where the response message identifies the current DFS channel over which the second wireless device is operating. Using the current DFS channel, the first wireless device establishes a new wireless connection with the second wireless device.

Device and method for reestablishing a wireless connection in a wireless network

A method for measuring the time of arrival of radio signals within a network comprises receiving the received signals including at least a first pseudorandom code and a second pseudorandom code from at least one other node; identifying a frequency difference between the node and the other node using a phase difference between each of a maximum value of a cross-correlation provided by the first pseudorandom code and the second pseudorandom code; applying the frequency difference to the reception of the received signal; and calculating the time of arrival of the received signal comprising a time, measured with a local clock, when the cross-correlation has achieved the maximum value.

Method for measuring the time of arrival of radio signals

Techniques are provided for communicating a data stream in a wireless communication network. A source divides the data stream into a first data sub-stream and a second data sub-stream. The first data sub-stream can be modulated using a first modulation technique to generate a first modulated data sub-stream, and the second data sub-stream can be modulated using a second modulation technique to generate a second modulated data sub-stream. A destination receives the first data sub-stream over a first frequency band, and receives the second data sub-stream over a second frequency band. The destination demodulates the first data sub-stream using a first demodulation technique to generate a first demodulated data sub-stream, and demodulates the second data sub-stream using a second demodulation technique to generate a second demodulated data sub-stream. The destination then combines the first demodulated data sub-stream and the second demodulated data sub-stream to generate the data stream.

Apparatus, system and method for communicating information in a wireless communication network

A system and method for transmitting packets in a network (). A node () in the network () accesses uses one of a plurality of medium access techniques for transmitting packets on the network (). The node () separates packets to be transmitted into classes based on at least one characteristic of the packets and selects one of the medium access techniques for each class of packets based on whether the medium access technique provides improved transmission efficiency for the at least one characteristic of the packets in the class. The node () transmits the packets in each respective class using the respective selected medium access technique.

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Melbourne, FL, United States of America

Pertti O Alapuranen