Mobile station having enhanced standby mode
First Claim
1. A method for operating a wireless mobile station in a standby mode, comprising the steps of:
- periodically making received signal strength measurements of a currently assigned digital control channel and at least one other currently non-assigned channel;
detecting that the mobile station has become stationary when a change over time in the received signal strength of the currently assigned digital control channel falls below a predetermined threshold;
verifying that the mobile station has become stationary;
terminating the measurements of the at least one other currently non-assigned channel;
detecting that the mobile station is no longer stationary when a change over time in the received signal strength of the currently assigned digital control channel rises above the predetermined threshold; and
initiating the measurements of the at least one other currently non-assigned channel;
whereinthe step of terminating the measurements of the at least one other currently non-assigned channel is also executed upon an occurrence of a detection by the mobile station that a cell serving the mobile station is a predetermined cell.
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Accused Products
Abstract
When a mobile station (10) is in a DCCH camping state it monitors its assigned page frame. After making RSSI and possibly also Bit Error Rate/Word Error Rate (BER/WER) measurements the mobile station monitors the rate of change of the RSSI. If the rate of change is small and remains so, the mobile station is assumed to be in a stationary state. After determining that it is stationary, the mobile station may give an audible alert and/or display a message to request the user to confirm that the mobile station is (and will remain) stationary. When in the stationary state the mobile station inhibits making neighbor channel measurements for DCCH reselection. The mobile station continues to monitor its assigned page frame within an assigned digital control channel and to measure its own channel RSSI and possibly also the BER/WER. If these values subsequently indicate that the mobile station is no longer stationary, the mobile station immediately resumes all neighbor channel measurements.
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Citations
14 Claims
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1. A method for operating a wireless mobile station in a standby mode, comprising the steps of:
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periodically making received signal strength measurements of a currently assigned digital control channel and at least one other currently non-assigned channel; detecting that the mobile station has become stationary when a change over time in the received signal strength of the currently assigned digital control channel falls below a predetermined threshold; verifying that the mobile station has become stationary; terminating the measurements of the at least one other currently non-assigned channel; detecting that the mobile station is no longer stationary when a change over time in the received signal strength of the currently assigned digital control channel rises above the predetermined threshold; and initiating the measurements of the at least one other currently non-assigned channel;
whereinthe step of terminating the measurements of the at least one other currently non-assigned channel is also executed upon an occurrence of a detection by the mobile station that a cell serving the mobile station is a predetermined cell. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of reducing the power consumption of a mobile station when operating in an idle mode, comprising the steps of:
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detecting, with the mobile station, a fulfillment of at least one first predetermined criterion when operating in the idle mode; in response to the detection of the fulfillment of the at least one first predetermined criterion, entering a power saving mode that operates by reducing a use of a receiver of the mobile station to receive signals from one or more cells that border a cell that currently serves the mobile station; detecting, with the mobile station, a fulfillment of at least one second predetermined criterion when operating in the power saving mode; and in response to the detection of the fulfillment of the at least one second predetermined criterion, exiting the power saving mode;
whereinthe at least one first predetermined criterion is comprised of an occurrence of a detection by the mobile station that a cell serving the mobile station is a predetermined cell. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for operating a wireless mobile station in a standby mode to conserve battery power, comprising the steps of:
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initiating a neighboring cell search task; and subsequently operating a controller of the mobile station to execute the following steps, receiving a paging block; calculating a motion indicator based at least in part on measured received signal strength indicator (RSSI) levels, including RSSI levels measured from neighboring cells; comparing the motion indicator to a threshold value; in accordance with a result of the step of comparing the motion indicator to the threshold value, performing one of continuing to make RSSI measurements of neighboring cells or terminating the making of RSSI measurements of neighboring cells, where an amount of RSSI measurements is a number of neighboring cell signal level samples per paging block reception, where the neighboring cell search task searches for adjacent cells from which cell synchronization data has not been received, and where refreshing procedures are periodically performed to receive cell synchronization data from neighboring cells from which cell synchronization data was previously received.
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Specification