A transmission power control scheme for transmissions via uplink shared and control channels

摘要

There is provided a mechanism for uplink transmission power control in a communication network. An uplink transmission power for a transmission from a communication network element to a communication network control element is calculated. When a transmission power control (TPC) command from the communication network control element is received instructing e.g. an increase of the uplink transmission power or a decrease of the uplink transmission power, it is checked whether the calculated uplink transmission power is above a maximum transmission power of the communication network element or below a minimum transmission power of the communication network element. If this is the case, and the transmission power control command instructs a change in the opposite direction, power control adjustment is conducted by determining and conducting a correction for immediately compensating for a difference between the calculated uplink transmission power and the maximum/minimum transmission power, wherein an actual transmission power is set on the basis of the correction parameter considering the received transmission power control command. Consequently, a UE will be able to immediately react to TPC commands also when a threshold such as an uplink transmission power limit is reached.