Wireless communication apparatus and transmission power control method thereof

Abstract

A wireless communication apparatus includes a variable power amplifier ( 19 ) and a power amplifier ( 20 ). A variable power amplifier control unit ( 24 ) controls the gain of the variable power amplifier ( 19 ) for controlling transmission power of the own apparatus. At this time, a condition change detecting unit ( 28 ) detects changes in conditions of the own station and a counter station. Based upon the detected condition changes, a transmission power control bit controlling unit ( 26 ) and a transmission power control period controlling unit ( 27 ) change a control period of a transmission power control bit and a transmission power control range. This transmission power control bit is inserted into a transmission signal, then, the transmission signal is transmitted to the counter station. The condition changes are detected based upon reception power, transmission power, the transmission power control bit, a change amount of control conditions, and a change speed of the control conditions.

1 . A wireless communication apparatus having a transmission power control function used to control transmission power of the apparatus by employing a transmission power control bit sent from a communication counter station to the apparatus, comprising: 
 a control period changing unit which dynamically changes a control period of the transmission power control bit in response to a transmission condition.    
   
   
       2 . A wireless communication apparatus as claimed in  claim 1 , further comprising a transmission power control range changing unit which changes a transmission power control range corresponding to the transmission power control bit.  
   
   
       3 . A wireless communication apparatus as claimed in  claim 1 , further comprising a condition detecting unit which detects a condition of the apparatus and a condition of the communication counter station, wherein said control period changing unit changes the control period based upon the detected condition.  
   
   
       4 . A wireless communication apparatus as claimed in  claim 2 , further comprising a condition detecting unit which detects a condition of the apparatus and a condition of the communication counter station, 
 wherein said control period changing unit changes the control period based upon the detected condition, and further wherein said transmission power control range changing unit changes the transmission power control range based upon the detected condition.    
   
   
       5 . A transmission power control method for controlling transmission power of a communication apparatus by employing a transmission power control bit which is sent from a counter communication station to the apparatus, comprising a step of: 
 dynamically changing a control period of said transmission power control bit in response to a transmission condition.    
   
   
       6 . A transmission power control method as claimed in  claim 5 , further comprising a step of changing a transmission power control range corresponding to said transmission power control bit.  
   
   
       7 . A transmission power control method as claimed in  claim 5 , further comprising a step of detecting a condition of the apparatus and a condition of the communication counter station, wherein the control period is changed based upon said detected condition.  
   
   
       8 . A transmission power control method as claimed in  claim 6 , further comprising a step of detecting a condition of the apparatus and a condition of the communication counter station, wherein the control period is changed based upon the detected condition, and further wherein the transmission power control range is changed based upon said detected condition.