Base station, radio communication system, and radio communication method

A radio communication system comprising:

• a scheduling unit configured to assign a radio resource used for receiving uplink data by transmitting transmission rate control data for controlling transmission rate for uplink data;
• and
• a call admission control unit configured to control an admission of a call, wherein
• the scheduling unit includes:
• a first determination unit configured to determine whether or not a transmission frequency of transmission rate control data for decreasing transmission rate for uplink data is equal to or higher than a transmission frequency threshold,
• a second determination unit configured to determine whether or not a counted number value of rate lowering event occurrences exceeds a counted number threshold, the rate lowering event being an event that decreases transmission rate for uplink data, and
• a setting unit configured to set admission permission information to information for limiting an admission of a new call in a case where the transmission frequency is equal to or higher than the predetermined frequency, and where the counted number value of rate lowering event occurrences exceeds the counted number threshold, and
• the call admission control unit determines whether or not to permit the admission of a new call based on the admission permission information set by the scheduling unit.

A radio communication method comprising:

• step A of assigning a radio resource used for receiving uplink data by transmitting transmission rate control data for controlling transmission rate for uplink data;
• step B of determining whether or not a transmission frequency of transmission rate control data for decreasing transmission rate for uplink data is equal to or higher than a transmission frequency threshold;
• step C of determining whether or not a counted number value of rate lowering event occurrences exceeds a counted number threshold, the rate lowering event being an event that decreases transmission rate for uplink data;
• step D of setting admission permission information to information for limiting an admission of a new call in a case where the transmission frequency is equal to or higher than the predetermined frequency, and where the counted number value of rate lowering event occurrences exceeds the counted number threshold;
• and
• step E of determining whether or not to permit the admission of a new call based on the admission permission information set by the step D.