Wireless Quality Collecting Device, Wireless Quality Collecting Method, and Computer-Readable Recording Medium

1. A wireless quality collecting device comprising: a memory; and a processor connected to the memory, wherein the processor executes a process comprising: receiving quality information on a wireless area from a terminal device that is located in the wireless area; counting, for each of a plurality of regions belonging to a predetermined range, a number of pieces of the quality information received at the receiving; and calculating, for each of the plurality of regions, a thin-out rate on a basis of a total number of pieces of the quality information counted at the counting, selecting, for, among the plurality of regions, a region in which the total number of pieces of the quality information counted at the counting is equal to or greater than a predetermined number, from among pieces of the quality information belonging to the region, the predetermined number of pieces of the quality information in accordance with the calculated thin-out rate and storing, in the memory, the selected quality information.

2. The wireless quality collecting device according to claim 1 , the process further comprises changing a period, for which pieces of the quality information are collected and sent and which is set in a terminal device located in the region in which the total number of pieces of the quality information is equal to or greater than the predetermined number, to a period that is longer than the period currently set.

3. The wireless quality collecting device according to claim 1 , the process further comprises changing a period, for which pieces of the quality information are collected and sent and which is set in a terminal device located in a region in which the total number of pieces of the quality information is equal to or less than a predetermined set lower limit, to a period that is shorter than the period currently set.

4. The wireless quality collecting device according to claim 1 , wherein the storing includes selecting, for the region in which the total number of pieces of the quality information is equal to or greater than the predetermined number, the quality information in the order pieces of the quality information are received at the receiving and at an interval of a value of an integer part of the result obtained by dividing the total number of pieces of the quality information by the predetermined number and storing the selected quality information in the memory.

5. A wireless quality collecting method comprising: receiving quality information on a wireless area from a terminal device that is located in the wireless area, using a processor; counting, for each of a plurality of regions belonging to a predetermined range, the number of pieces of the received quality information, using the processor; and calculating, for each of the plurality of regions, a thin-out rate on a basis of a total number of pieces of the quality information counted at the counting, selecting, for, among the plurality of regions, a region in which the total number of pieces of the counted quality information is equal to or greater than a predetermined number, from among pieces of the quality information belonging to the region, the predetermined number of pieces of the quality information in accordance with the calculated thin-out rate and storing the selected quality information in a predetermined storing unit, using the processor.

6. A non-transitory computer-readable recording medium having stored therein a wireless quality collecting program causing a computer to execute a process comprising: receiving quality information on a wireless area from a terminal device that is located in the wireless area; counting, for each of a plurality of regions belonging to a predetermined range, the number of pieces of the received quality information; and calculating, for each of the plurality of regions, a thin-out rate on a basis of the total number of pieces of the quality information counted at the counting, selecting, for, among the plurality of regions, a region in which the total number of pieces of the counted quality information is equal to or greater than a predetermined number, from among pieces of the quality information belonging to the region, the predetermined number of pieces of the quality information in accordance with the calculated thin-out rate and storing the selected quality information in a predetermined storing unit.