Patent ID: 6072784
Filing Date: 2000-06-06
Classification: H04W,Y02D

Abstract:
A method to manage mobile stations in a wireless network, comprising:receiving at a base station a low battery power 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 low battery power 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 in response to the low battery power signal;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; andtransmitting the schedule to the first and other stations in response to the low battery power signal.