Motorola Corporation

Other

Michael J Andresen

Keith Andrew Olds

David W Corman

Christopher N Kurby

Dean Lawrence Cook

Bradley B Bakke

A hoist for a garage door opener has three main components. A base which is sufficiently wide to provide stability and has wheels to facilitate placement of the device, an extensible shaft extending from said base, and a self leveling workpiece holder for holding said garage door opener in position for installation. Installation of the garage door opener is then accomplished by placing the motor and motor housing of the opener on the workpiece holder and positioning the free end of the drive shaft of the opener above the door. Then the extensible shaft of the device is raised until the opener housing is properly positioned for installation on the garage ceiling. Once the opener housing is securely attached to the ceiling the device may be collapsed and transported or stored as required.

Method of installing an overhead garage door opener

A method for a radio frequency communication unit (110) (CU) to hand off from a losing node (120) to an alternate node (122) estimates one or more alternate node uplink times (240) and alternate node uplink frequencies (242), which the alternate node uplink signal comprises. During handoff, the CU (110) ceases communications with the losing node (120) and immediately begins communications with the alternate node (122) using the uplink time and uplink frequency. A CU apparatus (300) uses a processor (302) for carrying out calculations necessary for estimating the alternate node uplink time and frequency. Information necessary for the calculations, such as a downlink signal time-of-arrival and Doppler offset, are collected by a CU receiver (306). The CU receiver (306) and a CU transmitter (304) are used to support downlink signals (142) and uplink signals (140), respectively, between the CU (110) and a node (120, 122).

Method and apparatus for inter-node handoff of a radio frequency

Cellular communication systems (20) use repeaters (50) to communicate with subscriber units (24) otherwise shadowed from base stations (22). A networked repeater (50) is provided for use in a cellular communication system with low-earth orbit satellites (22) and mobile subscriber units (24). Networked repeater (50) includes a base transceiver module (54) for communicating with the base stations (22) and a plurality of subscriber transceiver modules (56), each of which communicates with subscriber units (24). The base transceiver module (54) is located so as to be unshadowed, i.e. able to have unimpeded communication with at least one of the satellites (22). The subscriber transceiver module (56) is located so as to provide unshadowed communication with the subscriber units (24) that would otherwise be shadowed, i.e. unable to have unimpeded communication with any of the satellites (22).

Networked repeater

In a dynamic communication system (90) wherein communication parameters vary appreciably between transmissions, mobile subscriber units (200) are susceptible to link blockages resulting in a loss of successive feedback instructing subscriber units (200) of adjustments to communication parameters to be employed in a subsequent transmission on a communication link (105). When a mobile subscriber unit (200) is airborne, an outage may occur from a control surface blockage during maneuvering. Aircraft avionics (290) supplies acceleration data representing aircraft movement for use in predicting subsequent communication parameters. A method and system are employed to predict subsequent communication parameters and employ these predictions during link blockages in an attempt to reestablish communications and upon the removal of a link blockage, a mobile subscriber unit (200) employs the predicted communication parameters to resume communications.

Method and system of tracking dynamic communication parameters during a

In a dynamic communication system (90) wherein communication parameters vary between transmissions, subscriber units (200) are susceptible to intermittent link blockages. These blockages can result in a loss of successive feedback, instructing subscriber units (200) of adjustments to link parameters to be employed in a subsequent transmission on a communication link (105). Dynamic link parameters are predicted (240) continuously throughout intermittent link fades and these predictions are employed during link blockages in an attempt to re-establish communications. In addition, the subsequent resynchronization process resynchronizes the link parameter predicting model (240) based on how long the signal was interrupted.

Method and system reestablishing a temporarily interrupted dynamic

In a dynamic communication system (90) wherein communication parameters vary appreciably between transmissions, subscriber units (200) are susceptible to link blockages resulting in a loss of successive feedback instructing subscriber units (200) of adjustments to communication parameters to be employed in a subsequent transmission on a communication link (105). A method and system are employed to predict subsequent communication parameters and employ these predictions during link blockages in an attempt to reestablish communications and upon the removal of a link blockage, a subscriber unit (200) employs the predicted communication parameters in resuming communications without requiring complex reallocation of an additional communication link.

Method and parameter prediction system for reestablishing a temporarily

A method for a radio frequency communication unit (110) (CU) to hand off from a losing node (120) to a gaining node (122) estimates a gaining node uplink time (210) and a gaining node uplink frequency (212), which the gaining node uplink signal comprises. During handoff, the CU (110) ceases communications with the losing node (120) and immediately begins communications with the gaining node (122) using the uplink time and uplink frequency. A CU apparatus (300) uses a processor (302) for carrying out calculations necessary for estimating the gaining node uplink time and frequency. Information necessary for the calculations, such as a downlink signal time-of-arrival and Doppler offset, are collected by a CU receiver (306). The CU receiver (306) and a CU transmitter (304) are used to support downlink signals (142) and uplink signals (140), respectively, between the CU (110) and a node (120, 122).

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Apache Junction, AZ, United States of America

Michael J Andresen