Motorola Corporation

Motorola Solutions, Inc.

Wayne W Chiou

Vernon Anthony Allen

Ross A Miesem

Rickey G Pastor

Ralph L D'Souza

Minh T Pham

Shelly J Bethke

Randy L Ekl

David P Gurney

Qicai Shi

Jian C Huang

Feng Niu

Douglas H Weisman

Oleg Andric

Robert J O'Shea

Saritha Sivapuram

A cognitive radio (CR) system () includes CR units () that determine and update location-based system operating parameters to avoid interference with other systems operating in the same frequency band. Operational Location Uncertainty region and Allowed Location Error regions can be applied. The CR unit trades off between both, available channels and maximum system operating parameters, such that as Location Uncertainty of the CR device increases, available CR channels and location-based CR system operating parameters decrease over a maximum network reach.

Method for addressing user location errors in a cognitive radio system

A method and apparatus for determining a node's proper duty cycle is provided herein. All nodes () within a network () will interactively switch duty-cycles based on a number of hops a device is from a personal area network coordinator PNC. Changing duty cycles based on a number of hops from a PNC assures that spatial patterns of duty-cycles form in a network to maximize data throughput and minimize network wide power consumptions.

Method and apparatus for a node to determine a proper duty cycle within an ad-hoc network

In order to set up efficient routes between two closely-located nodes an optimized route for two nodes within a hybrid-cellular network (HCN) is achieved by converting an HCN route to an ad-hoc route. Thus, a node within the communication system may originally be communicating with another node via an HCN route and then instructed to switch to a more efficient ad-hoc route for communication with the node.

Routing protocol within hybrid-cellular networks

When a requesting node () has routing capabilities and attempts to join a network and there are no association slots available, the requesting node () will send an association message to a potential root node (). If the root node () has reached the maximum number of links, and has a non-routing capable node () associated with it, the root node () will send a message to the non-routing capable node (), instructing it to disassociate and attempt to re-associate at a later time. A message is then sent to the requesting node () for it to associate with the root node ().

Method and apparatus for network formation

Torsional hinge support beams ( ) that are corrugated, perforated and/or have non-uniform width are provided. The support beams are useful in flexural beam resonators ( ), in which they serve to support the main flexural mode-vibrating beam ( ). The support beams have phase lengths equal to an odd multiple of &pgr;/2, preferably the phase lengths are about equal to &pgr;/2 at the operating frequency of the resonators. Owing to the corrugations, the lengths of the support beams are shorter than comparable solid straight edge support beams. The short lengths of the support beams reduce the overall area occupied by the resonators and allow higher bias voltage to be employed in order to obtain greater electromechanical coupling.

Reduced size, low loss MEMS torsional hinges and MEMS resonators employing such hinges

Multiphase ceramic materials for use in multilayered device fabrication may be fabricated by providing novel glassy precursor materials of a preferred composition, with operable amounts of a non-glassy filler materials. The combined materials are fired at appropriate temperatures, so that a non-glassy anorthite type phase is formed. Material so fabricated is formed in a self-limiting process, in that reaction between the glassy precursor material and the non-glass filler material is terminated when one constituent of the glassy precursor material is fully consumed. The materials of the instant invention, fabricated according to the method disclosed herein, demonstrate excellent dielectric constant, and electrical loss characteristics.

Ceramic composition and method of making same

Ceramic composition

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Sunrise, FL, United States of America

Wayne W Chiou