Cell selection based on priority factors in overlapping cells using different frequencies

A base station comprising:

• a determining unit that determines priority factors of frequencies of a plurality of cells of different frequencies;
• and
• a transmitting unit that transmits the priority factors to a terminal that has set a cell of the plurality of cells formed by the base station as a serving cell;
• wherein the terminal:
• receives, from the base station forming the cell set as the serving cell, a condition regarding reception power used as a standard for determining whether to select the cell to be set as the serving cell next;
• measures the reception power of a neighboring cell other than the serving cell;
• generates an arbitrary value when the measured value of the reception power satisfies the condition regarding reception power;
• calculates a ratio based on a priority factor of a frequency of a recognizable cell and a priority factor of a frequency of the serving cell;
• and
• selects the cell to be set as the serving cell next from among the plurality of cells of different frequencies based on a result of comparison between the ratio and the arbitrary value.

A terminal comprising:

• a receiving unit that receives priority factors of frequencies of a plurality of cells of different frequencies, from a base station forming a cell set as a serving cell;
• and
• a selecting unit that selects a cell to be set as a serving cell next from among the plurality of cells of the different frequencies based on the priority factors;
• wherein
• the receiving unit:
• receives, from the base station forming the serving cell, a condition regarding reception power used as a standard for determining whether to select the cell to be set as the serving cell next;
• and
• measures the reception power of a neighboring cell other than the serving cell;
• and
• the selecting unit:
• generates an arbitrary value when the measured value of the reception power satisfies the condition regarding reception power;
• calculates a ratio based on a priority factor of a frequency of a recognizable cell of the plurality of cells and a priority factor of a frequency of the serving cell;
• and
• selects the cell to be set as the serving cell next from among the plurality of cells of different frequencies based on a result of comparison between the ratio and the arbitrary value.

A wireless communication method comprising:

• determining, by a base station, priority factors of frequencies of a plurality of cells of different frequencies;
• transmitting, by the base station, the priority factors to a terminal that has set a cell of the plurality of cells of different frequencies formed by the base station as the serving cell;
• receiving, by the terminal, the priority factors from the base station forming the cell set as the serving cell;
• selecting, by the terminal, a cell to be set as the serving cell next from among the plurality of cells based on the received priority factors;
• measuring, by the terminal, the reception power of a neighboring cell other than the serving cell, wherein
• the receiving includes receiving, as well as the priority factors, a condition regarding reception power used as a standard for determining whether to select the cell to be set as the serving cell next;
• and
• the selecting includes:
• generating an arbitrary value when the measured value of the reception power satisfies the condition regarding reception power;
• and
• calculating a ratio based on a priority factor of a frequency of a recognizable cell and a priority factor of a frequency of the cell set as the serving cell;
• and
• selecting the cell to be set as the serving cell next from among the plurality of cells of the different frequencies based on a result of comparison between the ratio and the arbitrary value.