Remote wireless unit having reduced power operating mode
First Claim
1. A remote unit for a personal wireless area network comprising:
- a receiver;
an AC power supply coupled to the receiver and supplying power to the receiver;
a battery-backup power supply coupled to the receiver, the battery-backup power supply becoming operative to supply power to the receiver when the AC power supply fails; and
a controller coupled to the receiver, the AC power supply and the battery-backup power supply, the controller detecting when the AC power supply fails and in response controls the receiver and the battery-backup power supply by invoking a sleep mode of operation, the sleep mode operation being periodically interrupted by the controller controlling the receiver and the battery-backup power supply to enter a standby mode of operation in which the receiver scans for a CONNECT message indicating an incoming call, the controller controlling the sleep mode and the standby mode of operations based on a frame count that is generated from an identification number of the remote unit.
5 Assignments
0 Petitions
Accused Products
Abstract
A remote unit for a personal wireless area network includes a receiver, an AC power supply, a battery-backup power supply and a controller. The battery-backup becomes operative when the AC power supply fails and supplied power to the receiver. The controller detects when the AC power supply fails and controls the receiver and the battery-backup power supply by invoking a sleep mode of operation. The sleep mode of operation is periodically interrupted by the controller controlling the receiver and the battery-backup power supply to enter a standby mode of operation in which the receiver scans for a CONNECT message from a base station indicating an incoming call. The controller coordinates the sleep mode and the standby mode of operations based on a frame count that is generated from an identification number of the remote unit. A highly bandwidth-efficient communications method is employed in the base station to enable it to coordinate communication with the remote unit when it changes from the sleep mode to the standby mode.
50 Citations
10 Claims
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1. A remote unit for a personal wireless area network comprising:
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a receiver; an AC power supply coupled to the receiver and supplying power to the receiver; a battery-backup power supply coupled to the receiver, the battery-backup power supply becoming operative to supply power to the receiver when the AC power supply fails; and a controller coupled to the receiver, the AC power supply and the battery-backup power supply, the controller detecting when the AC power supply fails and in response controls the receiver and the battery-backup power supply by invoking a sleep mode of operation, the sleep mode operation being periodically interrupted by the controller controlling the receiver and the battery-backup power supply to enter a standby mode of operation in which the receiver scans for a CONNECT message indicating an incoming call, the controller controlling the sleep mode and the standby mode of operations based on a frame count that is generated from an identification number of the remote unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for reducing power consumption of a remote unit in a PWAN system, comprising the steps of:
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powering a remote unit using a battery backup power supply when an AC power supply fails at the remote unit; entering a sleep mode of operation at the remote unit, the sleep mode having a reduced power consumption for the battery backup power supply; entering a standby mode of operation at the remote unit a predetermined period of time after entering the sleep mode of operation scanning for a CONNECT message indicating an incoming call for the remote unit; and reentering the sleep mode of operation when no CONNECT message is received. - View Dependent Claims (8, 9, 10)
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Specification