Wireless communication device capable of controlling transmission power and transmission power control method therefor and wireless communication system employing the same

A method of controlling transmission power of a wireless communication device capable of controlling a level of transmission power, comprising the steps of:

• performing data transmission with the level of transmission power;
• after said data transmission has completed, increasing the level of transmission power in said data transmission by a first predetermined level to provide a level of transmission power for a subsequent data transmission;
• determining from an externally received signal whether said data transmission provides a successful transmission result or an unsuccessful transmission result;
• and
• if said data transmission provides said successful transmission result, decreasing by a second predetermined level the level of transmission power for said subsequent data transmission corresponding to the level of transmission power increased by said first predetermined level.

A wireless communication system comprising:

• a receiving, first wireless communication device returning a response signal indicative of a result of receiving transmitted data;
• a transmitting, second wireless communication device capable of controlling a level of transmission power in data transmission, said second wireless communication device including
• a control portion for setting data to be transmitted subjected to said data transmission and a level of transmission power for said data transmission,
• a transmitter for performing said data transmission with the level of transmission power set by said control portion, and
• a response signal determination portion determining from said response signal whether said data transmission provides a successful transmission result or an unsuccessful transmission result, said control portion
• i) after said data transmission completes and before said transmission result is determined, increasing a level of transmission power for a current data transmission by a first predetermined level to a first level of power to provide a level of transmission power for a subsequent data transmission, and
• ii) if said response signal determination portion determines that said data transmission provides said successful transmission result, setting the level of transmission power for the subsequent data transmission to be a second level of power corresponding to said first level of power minus a second predetermined level.