CDMA mobile station wireless transmission power management with adaptive scheduling priorities based on battery power level

A method to manage mobile stations in a wireless network, comprising:

• receiving at a base station a signal from a first mobile station that its battery power is below a threshold value;
• changing at the base station a mobile transmission schedule to cause transmission of messages from the first mobile station to occur before transmission of messages from other stations, in response to the signal;
• scheduling transmissions from low battery power mobile stations to be clustered together in a low-power time slot which is separate in time from scheduled transmissions from high battery power mobile stations;
• transmitting a power control message to the low battery power mobile stations, to reduce the transmission power required for the low battery power mobile stations during the low-power time slot;
• transmitting the schedule to the first and other stations;
• said first mobile station having a first high priority message and a first low priority message to transmit and having its battery power below a first threshold value;
• receiving at a base station a signal from a second mobile station that its battery power is below a second threshold value greater than the first threshold value;
• said second mobile station having a second high priority message and a second low priority message to transmit;
• said changing step causing transmission of said messages to be ordered with the first high priority, followed by the second high priority, followed by high priority messages from other stations, followed by the first low priority, followed by the second low priority, followed by low priority messages from other stations.

A method to manage mobile stations in a wireless network, comprising:

• receiving at a base station a signal from a first mobile station that its battery power is below a threshold value;
• changing at the base station a mobile transmission schedule to cause transmission of messages from the first mobile station to occur before transmission of messages from other stations, in response to the signal;
• scheduling transmissions from low battery power mobile stations to be clustered together in a low-power time slot which is separate in time from scheduled transmissions from high battery power mobile stations;
• transmitting a power control message to the low battery power mobile stations, to reduce the transmission power required for the low battery power mobile stations during the low-power time slot;
• transmitting the schedule to the first and other stations;
• said first mobile station having a first high priority message and a first low priority message to transmit and having its battery power below a first threshold value;
• receiving at a base station a signal from a second mobile station that its battery power is below a second threshold value greater than the first threshold value;
• said second mobile station having a second high priority message and a second low priority message to transmit;
• said changing step defining at least a portion of a code division multiple access frame with a first time slot for the first high priority message, followed by a second time slot for the second high priority message, followed by a third time slot for the high priority messages from other stations, followed by a fourth time slot for the first low priority message, followed by a fifth time slot for the second low priority message, followed by a sixth time slot for the low priority messages from other stations.

A system to manage mobile stations in a wireless network, comprising:

• means for receiving at a base station a low battery power signal from a first mobile station that its battery power is below a threshold value;
• means for changing at the base station a mobile transmission schedule to cause transmission of messages from the first mobile station to occur before transmission of messages from other stations, in response to the low battery power signal;
• means for scheduling transmissions from low battery power mobile stations to be clustered together in a low-power time slot which is separate in time from scheduled transmissions from high battery power mobile stations in response to the low battery power signal;
• means for transmitting a power control message to the low battery power mobile stations, to reduce the transmission power required for the low battery power mobile stations during the low-power time slot in response to the low battery power signal;
• and
• means for transmitting from the base station the schedule to the first and other stations in response to the low battery power signal.

A system to manage mobile stations in a wireless network, comprising:

• means for receiving at a base station a signal from a first mobile station that its battery power is below a threshold value;
• means for changing at the base station a mobile transmission schedule to cause transmission of messages from the first mobile station to occur before transmission of messages from other stations, in response to the signal;
• means for scheduling transmissions from low battery power mobile stations to be clustered together in a low-power time slot which is separate in time from scheduled transmissions from high battery power mobile stations;
• means for transmitting a power control message to the low battery power mobile stations, to reduce the transmission power required for the low battery power mobile stations during the low-power time slot;
• means for transmitting from the base station the schedule to the first and other stations;
• said first mobile station having a first high priority message and a first low priority message to transmit and having its battery power below a first threshold value;
• means for receiving at a base station a signal from a second mobile station that its battery power is below a second threshold value greater than the first threshold value;
• said second mobile station having a second high priority message and a second low priority message to transmit;
• said changing means causing transmission of said messages to be ordered with the first high priority, followed by the second high priority, followed by high priority messages from other stations, followed by the first low priority, followed by the second low priority, followed by low priority messages from other stations.

A system to manage mobile stations in a wireless network, comprising:

• means for receiving at a base station a signal from a first mobile station that its battery power is below a threshold value;
• means for changing at the base station a mobile transmission schedule to cause transmission of messages from the first mobile station to occur before transmission of messages from other stations, in response to the signal;
• means for scheduling transmissions from low battery power mobile stations to be clustered together in a low-power time slot which is separate in time from scheduled transmissions from high battery power mobile stations;
• means for transmitting a power control message to the low battery power mobile stations, to reduce the transmission power required for the low battery power mobile stations during the low-power time slot;
• means for transmitting from the base station the schedule to the first and other stations;
• said first mobile station having a first high priority message and a first low priority message to transmit and having its battery power below a first threshold value;
• means for receiving at a base station a signal from a second mobile station that its battery power is below a second threshold value greater than the first threshold value;
• said second mobile station having a second high priority message and a second low priority message to transmit;
• said changing means defining at least a portion of a code division multiple access frame with a first time slot for the first high priority message, followed by a second time slot for the second high priority message, followed by a third time slot for the high priority messages from other stations, followed by a fourth time slot for the first low priority message, followed by a fifth time slot for the second low priority message, followed by a sixth time slot for the low priority messages from other stations.