Radio communication system and base stations and mobile stations in the system

A radio communication system, comprising:

• plural base stations;
• plural mobile stations;
• and
• plural controllers for controlling the number of radio channels,
• wherein:
• said base station, comprising:
• a first deciding means for deciding the number of reverse traffic channels being radio channels that is used when said base station transmits data to said mobile station;
• first buffer storage for storing said data temporarily;
• and
• a first data transmitting means for transmitting said data storing in said first buffer storage to said mobile station by using the number of said reverse traffic channels decided at said first deciding means, and
• said mobile station, comprising:
• a second deciding means for deciding the number of forward traffic channels being radio channels that is used when said mobile station transmits data to said base station;
• second buffer storage for storing said data temporarily;
• and
• a second data transmitting means for transmitting said data storing in said second buffer storage to said base station by using the number of said forward traffic channels decided at said second deciding means, and
• said controller, comprising:
• a first measuring means for measuring the amount of said data storing in said first buffer storage;
• a second measuring means for measuring the amount of said data storing in said second buffer storage;
• a first comparing means for comparing the amount of said data measured at said first measuring means with a first threshold value and a second threshold value;
• a second comparing means for comparing the amount of said data measured at said second measuring means with said first threshold value and said second threshold value;
• a first increasing/decreasing means for increasing the number of said reverse traffic channels when the amount of said data storing in said first buffer storage is more than said first threshold value and for decreasing the number of said reverse traffic channels when the amount of said data storing in said first buffer storage is less than said second threshold value based on said compared result at said first comparing means;
• and
• a second increasing/decreasing means for increasing the number of said forward traffic channels when the amount of said data storing in said second buffer storage is more than said first threshold value and for decreasing the number of said forward traffic channels when the amount of said data storing in said second buffer storage is less than said second threshold value based on said compared result at said second comparing means.