Method to Prevent Excessive Current Drain of Telematics Unit Network Access Device
First Claim
1. A method for flexible discontinuous receive management in a telematics unit in a vehicle comprising the steps of:
- when the vehicle is off, detecting availability of a communications service from a wireless network;
if the communication service is not available, operating the telematics unit in a first mode of a Standby State wherein a sleep cycle value of the telematics unit is above a first predetermined threshold; and
if the communication service is available, operating the telematics unit in a second mode of a Standby State wherein a sleep cycle value is in a range from zero to the first predetermined threshold.
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Accused Products
Abstract
The disclosed examples illustrate a system and method that prevent excessive current drain through the network access device (NAD) of a telematics unit and provide flexible discontinuous-receive management. Normally, when in a Standby State and where communication service is unavailable, the NAD may dissipate current at rate many times more than where communication service is available. A Standby Counter provides the length of the time interval for Standby State or the sleep cycle. Certain of the disclosed examples prevent excessive vehicle battery drain by operating the telematics unit in a first mode wherein a sleep cycle value of the telematics unit is above a first predetermined threshold, and if the communication service is available, operating the telematics unit in a second mode wherein a sleep cycle value is in a range from zero to the first predetermined threshold.
30 Citations
20 Claims
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1. A method for flexible discontinuous receive management in a telematics unit in a vehicle comprising the steps of:
- when the vehicle is off, detecting availability of a communications service from a wireless network;
if the communication service is not available, operating the telematics unit in a first mode of a Standby State wherein a sleep cycle value of the telematics unit is above a first predetermined threshold; and
if the communication service is available, operating the telematics unit in a second mode of a Standby State wherein a sleep cycle value is in a range from zero to the first predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20)
- when the vehicle is off, detecting availability of a communications service from a wireless network;
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17. A computer-readable medium having thereon computer-executable instructions for flexible discontinuous receive management in a telematics unit in a vehicle comprising instructions for when the vehicle is off, detecting availability of a communications service from a wireless network;
- if the communication service is not available, operating the telematics unit in a first mode wherein a sleep cycle value of the telematics unit is above a first predetermined threshold; and
if the communication service is available, operating the telematics unit in a second mode wherein a sleep cycle value is in a range from zero to the first predetermined threshold.
- if the communication service is not available, operating the telematics unit in a first mode wherein a sleep cycle value of the telematics unit is above a first predetermined threshold; and
Specification