Thermal energy control in a mobile transceiver
A method and apparatus for controlling thermal energy generation in a User Equipment (UE) operating in a radio telecommunication network. The thermal energy generation is directly proportional to a transmit power level in the UE, and a Node B allocates transmit power levels to a plurality of UEs through scheduling grants. Upon request by the UE, the Node B allocates a dedicated scheduling grant to the UE authorizing a higher transmit power. If the UE subsequently overheats, it sends a power reduction request to the Node B. Upon approval, all or part of the dedicated grant is removed, and the UE transmits at a lower power level to reduce thermal generation. The Node B retains control of the grant and may reallocate it to a common scheduling grant or may allocate another dedicated grant to a different UE.
1. A method of controlling thermal energy generation in a first mobile transceiver operating in a radio telecommunication network, wherein said thermal energy generation is directly proportional to a transmit power level in the mobile transceiver, and a network node allocates transmit power levels to a plurality of mobile transceivers through scheduling grants, said method comprising the steps of:
allocating by the network node, a first common scheduling grant to the plurality of mobile transceivers, the first common scheduling grant authorizing each of the mobile transceivers to transmit at a first common power level;
receiving by the network node, a request from the first mobile transceiver to increase transmit power;
allocating by the network node, a dedicated scheduling grant to the first mobile transceiver in response to the request to increase transmit power, said dedicated scheduling grant authorizing the first mobile transceiver to transmit at a higher dedicated transmit power level;
allocating by the network node, a second common scheduling grant to mobile transceivers other than the first mobile transceiver, the second common scheduling grant authorizing each of the mobile transceivers to transmit at a second common power level lower than the first common power level and offsetting the dedicated grant allocated to the first mobile transceiver;
subsequently receiving by the network node, a request from the first mobile transceiver to decrease transmit power due to an overheat condition in the mobile transceiver;
removing by the network node, the dedicated scheduling grant from the first mobile transceiver in response to the request to decrease transmit power; and
allocating by the network node, a third common scheduling grant to the plurality of mobile transceivers, the third common scheduling grant authorizing each of the mobile transceivers to transmit at a third common power level higher than the second common power level and reallocating the dedicated grant within the third common scheduling grant.