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 in a network node for 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 first mobile transceiver, and the network node allocates transmit power levels to a plurality of mobile transceivers through Serving Grants, said method comprising the steps of:
receiving from the first mobile transceiver, Scheduling Information and an indication that the first mobile transceiver is not satisfied with a first Serving Grant;
in response to receiving the indication from the first mobile transceiver, allocating only to the first mobile transceiver, a dedicated grant authorizing a transmit power level higher than the first Serving Grant;
allocating to the plurality of mobile transceivers, a second Serving Grant reducing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant allocated to the first mobile transceiver;
subsequently receiving from the first mobile transceiver, a request to reduce transmit power due to an overheat condition in the first mobile transceiver;
in response to receiving the request from the first mobile transceiver to reduce transmit power, removing the dedicated grant or a portion thereof from the first mobile transceiver; and
allocating to the plurality of mobile transceivers, a third Serving Grant increasing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant or the portion thereof removed from the first mobile transceiver.
2. The method according to claim 1 , further comprising the steps of:
subsequently receiving from a second mobile transceiver, Scheduling Information and an indication that the second mobile transceiver is not satisfied with the third Serving Grant;
in response to receiving the indication from the second mobile transceiver, allocating only to the second mobile transceiver, a dedicated grant authorizing a transmit power level higher than the third Serving Grant; and
allocating to the plurality of mobile transceivers, a fourth Serving Grant reducing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant allocated to the second mobile transceiver.
3. A network node for 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 first mobile transceiver, and the network node allocates transmit power levels to a plurality of mobile transceivers through Serving Grants, said network node comprising:
a receiver configured to:
receive from the first mobile transceiver, Scheduling Information and an indication that the first mobile transceiver is not satisfied with a first Serving Grant; and
subsequently receiving from the first mobile transceiver, a request to reduce transmit power due to an overheat condition in the first mobile transceiver;
a power allocation processor configured to:
allocate only to the first mobile transceiver, a dedicated grant authorizing a transmit power level higher than the first Serving Grant, in response to receiving the indication from the first mobile transceiver;
allocate to the plurality of mobile transceivers, a second Serving Grant reducing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant allocated to the first mobile transceiver;
remove the dedicated grant or a portion thereof from the first mobile transceiver, in response to receiving the request from the first mobile transceiver to reduce transmit power; and
allocate to the plurality of mobile transceivers, a third Serving Grant increasing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant or the portion thereof removed from the first mobile transceiver; and
a transmitter configured to:
transmit the first, second and third Serving Grants to the plurality of mobile transceivers;
transmit the dedicated grant to the first mobile terminal; and
subsequently transmit to the first mobile terminal, an indication that the dedicated grant has been removed.
4. The network node according to claim 3 , wherein:
the receiver is also configured to:
subsequently receive from a second mobile transceiver, Scheduling Information and an indication that the second mobile transceiver is not satisfied with the third Serving Grant;
the power allocation processor is also configured to:
allocate only to the second mobile transceiver, a dedicated grant authorizing a transmit power level higher than the third Serving Grant in response to receiving the indication from the second mobile transceiver; and
allocate to the plurality of mobile transceivers, a fourth Serving Grant reducing the transmit power level authorized for each of the mobile transceivers by an amount calculated to offset, when applied to the plurality of mobile transceivers, the dedicated grant allocated to the second mobile transceiver; and
the transmitter is also configured to:
transmit the dedicated grant to the second mobile terminal; and transmit the fourth Serving Grant to the plurality of mobile transceivers.