Operation of a radiotelephone in a synchronous extended standby mode for conserving battery power
First Claim
1. A method for operating a radiotelephone at reduced power, the radiotelephone having a receiver for receiving a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion, the radiotelephone having signal processing circuitry including synchronization circuitry responsive to the synchronization portion of an individual one of said messages to permit a reading of data of the data portion of an individual one of said messages, said signal processing circuitry including a digital phase locked loop (DPLL) with phase adjustment capability, said radiotelephone including power application circuitry for application and disconnection of electric power to said receiver, wherein power is applied continuously to the DPLL, the method comprising steps of:
- synchronizing the DPLL with bits of a portion of an Nth message of said sequence of messages, the DPLL providing a clock signal to enable a reading of data;
reading data of the data portion of said Nth message;
subsequent to said reading step, inhibiting phase adjustment of the DPLL;
operating the power application circuitry for deactivating the receiver;
operating the power application circuitry for activating the receiver at a predetermined time interval prior to occurrence of a selected partof the data portion of a message subsequent to a first message, said predetermined time interval being limited in duration to the duration of a transient settling time of the receiver upon the activation of the receiver; and
enabling the phase adjustment capability of the DPLL in an interval of time beginning at or prior to the selected part of the data portion of the subsequent message and continuing during the occurrence of the selected part of the data portion of the subsequent message.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and system for operating a radiotelephone at reduced power provides for a deenergization of a receiver of the radiotelephone wherein the receiver, during periods of activation, receives a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion. Included within the radiotelephone is signal processing circuitry synchronized by a synchronization portion of an individual one of the messages to permit a reading of data of the data portion of an individual one of the messages. A digital phase locked lop (DPLL) with phase adjustment capability enables operation of synchronization circuitry and the data reading circuitry. Electronic circuitry within the DPLL provides for inhibiting the phase adjustment function in response to the command of a controller of the radiotelephone subsequent to a reading of data and concurrently with a termination of power to the receiver. The phase adjustment function is enabled upon reactivation of the receiver and operation of the data reading circuitry for reading data of a subsequent message.
-
Citations
21 Claims
-
1. A method for operating a radiotelephone at reduced power, the radiotelephone having a receiver for receiving a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion, the radiotelephone having signal processing circuitry including synchronization circuitry responsive to the synchronization portion of an individual one of said messages to permit a reading of data of the data portion of an individual one of said messages, said signal processing circuitry including a digital phase locked loop (DPLL) with phase adjustment capability, said radiotelephone including power application circuitry for application and disconnection of electric power to said receiver, wherein power is applied continuously to the DPLL, the method comprising steps of:
-
synchronizing the DPLL with bits of a portion of an Nth message of said sequence of messages, the DPLL providing a clock signal to enable a reading of data; reading data of the data portion of said Nth message; subsequent to said reading step, inhibiting phase adjustment of the DPLL; operating the power application circuitry for deactivating the receiver; operating the power application circuitry for activating the receiver at a predetermined time interval prior to occurrence of a selected part of the data portion of a message subsequent to a first message, said predetermined time interval being limited in duration to the duration of a transient settling time of the receiver upon the activation of the receiver; and enabling the phase adjustment capability of the DPLL in an interval of time beginning at or prior to the selected part of the data portion of the subsequent message and continuing during the occurrence of the selected part of the data portion of the subsequent message. - View Dependent Claims (2, 3, 4)
-
-
5. A system for operating a radiotelephone at reduced power, the radiotelephone comprising:
-
a receiver for receiving a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion; signal processing circuitry including synchronization circuitry responsive to the synchronization portion of an individual one of said messages to enable a reading of data of the data portion of an individual one of said messages, said signal processing circuitry including a digital phase locked loop (DPLL) with phase adjustment capability, said signal processing circuitry applying electric power to said DPLL continuously from a steady source of power, said DPLL being synchronized by bits of a portion of an Nth message of said sequence of messages; power application circuitry for application of electric power to said receiver; reading means for accomplishing said reading of data, said reading means reading data of at least a selected part of the data portion of said Nth message; inhibiting means for inhibiting phase adjustment of the DPLL, and controller means for activating said inhibiting means subsequent to a reading of data by said reading means; wherein said power application circuitry is operative for deactivating the receiver upon a conclusion of a reading of data of said selected part of the data portion of said Nth message; said power application circuitry is operative for activating the receiver subsequent to said Nth message at a predetermined time interval prior to occurrence of at least a selected part of the data portion of an (N+1)th message of said sequence of messages, said predetermined time interval being limited in duration to the duration of a transient settling time of the receiver upon an activation of the receiver; and said controller means disables said inhibiting means for enabling the phase adjustment capability of the DPLL in an interval of time beginning at or prior to and continuing during the occurrence of the selected part of the data portion of the (N+1)th message. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for operating a radiotelephone at reduced power, the radiotelephone having a receiver for receiving a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion, the data portion comprising a plurality of data channels each of which has a succession of repeated data segments, the radiotelephone having signal processing circuitry including synchronization circuitry responsive to the synchronization portion of an individual one of said messages to permit a reading of data of the data portion of an individual one of said messages, said signal processing circuitry including a digital phase locked loop (DPLL) with phase adjustment capability, said radiotelephone including power application circuitry for application and disconnection of electric power to said receiver, wherein power is applied continuously to the DPLL, the method comprising steps of:
-
synchronizing the DPLL with a bit stream of a selected data segment of said data segments of an Nth message of said sequence of messages, the DPLL providing a clock signal to enable a reading of data; reading data of the data segment of said Nth message; subsequent to said reading step, inhibiting phase adjustment of the DPLL; operating the power application circuitry for deactivating the receiver; operating the power application circuitry for activating the receiver at a predetermined time interval prior to occurrence of the selected data segment of the (N+1)th message of said sequence of messages, said predetermined time interval being limited in duration to the duration of a transient settling time of the receiver upon the activation of the receiver; and enabling the phase adjustment capability of the DPLL in an interval of time beginning at or prior to the selected data segment of the (N+1)th message of said sequence of messages and continuing during the occurrence of the selected data segment of said (N+1)th message. - View Dependent Claims (19)
-
-
20. A system for operating a radiotelephone at reduced power, the radiotelephone comprising:
-
a receiver for receiving a sequence of messages of a control channel, each message having a synchronization portion and a data portion which follows the synchronization portion, the data portion comprising a plurality of data channels each of which has a succession of repeated data segments; signal processing circuitry including synchronization circuitry responsive to the synchronization portion of an individual one of said messages to enable a reading of data of the data portion of an individual one of said messages, said signal processing circuitry including a digital phase locked loop (DPLL) with phase adjustment capability, said signal processing circuitry applying electric power to said DPLL continuously from a steady source of power, said DPLL being synchronized by a bit stream of a selected data segment of said data segments of an Nth message of said sequence of messages; power application circuitry for application of electric power to said receiver; reading means for accomplishing said reading of data, said reading means reading data of the selected data segment of said Nth message; inhibiting means for inhibiting phase adjustment of the DPLL, and controller means for activating said inhibiting means subsequent to a reading of data by said reading means; wherein said power application circuitry is operative for deactivating the receiver upon a conclusion of a reading of data of said selected data segment of said Nth message; said power application circuitry is operative for activating the receiver subsequent to said Nth message at a predetermined time interval prior to occurrence of the selected data segment of an (N+1)th message of said sequence of messages, said predetermined time interval being limited in duration to the duration of a transient settling time of the receiver upon an activation of the receiver; and said controller means disables said inhibiting means for enabling the phase adjustment capability of the DPLL in an interval of time beginning at or prior to and continuing during the occurrence of the selected data segment of the (N+1)th message. - View Dependent Claims (21)
-
Specification