Patent ID: 7522934

Claim:
An information processing apparatus for communicating wirelessly with an administrative system and for transmitting data to another information processing apparatus via said administrative system, said information processing apparatus comprising: communicating means for transmitting data to said administrative system and for transmitting or receiving information for controlling the wireless communication with said administrative system; measuring means for measuring a reception level of said information or said data being received by said communicating means; and controlling means for controlling transmission power in a manner allowing said communicating means to transmit said information or said data; wherein said controlling means compares a data length of the data with a threshold value, if the data length is not greater than the threshold value, said controlling means controls said transmission power such that the data is transmitted at a maximum controllable transmission power level or at a first transmission power level close to the maximum controllable transmission power level, and if the data length is greater than the threshold value, said controlling means controls said transmission power such that a first item of said information signaling a start of transmission of said data is transmitted at the maximum controllable transmission power level or at the first transmission power level, and if a second item of said information is transmitted by said administrative system based on the first information item to enable the start of transmission of said data and is received by said communicating means, said measuring means measures a reception level of the second information item and said controlling means controls the power for transmitting said data based on said reception level measured by said measuring means.