Local wireless communication system, radio field intensity control method, control device, and program

A radio field intensity control method for controlling radio wave intensities of radio waves emitted from a base station, the base station emitting the radio waves in a licensed bandwidth to form a wireless communication environment in a predetermined area, a plurality of sensors being disposed along an edge of the predetermined area, a control apparatus communicable with the base station, a plurality of beams in a time division manner, the radio field intensity control method comprising:

• measuring, by each of the plurality of sensors and the plurality of beams, the radio field intensity of radio waves emitted from the base station;
• feeding back, by each of the plurality of sensors and the plurality of beams, the measured radio field intensities to the base station;
• controlling, by the base station, transmission powers of the radio waves for each of the plurality of beams;
• calculate information for controlling the transmission power for each of the plurality of beams according to the radio field intensity;
• generate and transmit a power measurement signal;
• calculate, by the control apparatus, a next transmission power for each beam of the plurality of beams according to the radio field intensity measured by the plurality of sensors;
• determine, by the control apparatus, a difference between the transmission power and the next transmission power;
• terminate, by the control apparatus, transmission in response to the difference being less than or equal to the prescribed threshold;
• transmit, by the control apparatus, the power measurement signal to each beam of the plurality of beams in response to the difference being greater than the threshold value, wherein the power measurement signal is the next transmission power;
• update, by the control apparatus, the transmission power according to the next transmission power;
• and
• provide the transmission power to the base station to control the notified radio field intensity.

A control apparatus applicable to a local wireless communication system, the local wireless communication system including a base station configured to emit radio waves to form a wireless communication environment in a predetermined area, a plurality of sensors disposed along an edge of the predetermined area, and a plurality of beams in a time division manner, the control apparatus comprising:

• a memory configured to store a program;
• and
• a processor configured to execute the program,
• wherein
• the processor includes a calculation function for calculating transmission powers of the radio waves emitted from the base station to control radio field intensities of the radio waves emitted from the base station measured by the plurality of sensors, and calculating a next transmission for each beam of the plurality of beams according to the radio field intensities measured by the plurality of sensors;
• a determining function for determining a difference between the transmission power and the next transmission power, terminating transmission in response to the difference being less than or equal to a threshold value, and transmitting a power measurement signal to each beam of the plurality of beams in response to the difference being greater than the threshold value, wherein the power measurement is the next transmission power;
• an updating function of updating the transmission power according to the next transmission power.