A cell selection system for selecting a cell (31, 42a, 42b, 42c) to be used for communications by a mobile terminal (1; 2; 4) in a network, the cell selection system comprising: a first cell of the network using a first communication protocol; a plurality of second cells (42a, 42b, 42c) of the network, the plurality of second cells (42a, 42b, 42c) using a second communication protocol that is different from the first communication protocol; and the mobile terminal (1; 2; 4), wherein the mobile terminal (1; 2; 4) is adapted to support the first and second communication protocols in the first and second cells, wherein broadcast information including cell selection information is transmitted in the first cell, the cell selection information including cell change judgment parameters, wherein, in each of the second cells, broadcast information is transmitted, and wherein the mobile terminal (1; 2; 4) is adapted to receive the broadcast information of the first cell and the broadcast information of one of the second cells (42a, 42b, 42c); to read the cell selection information from the broadcast information of the first cell; to judge whether or not to change a communication connection of the mobile terminal (1; 2; 4) from the first cell to the one of the second cells (42a, 42b, 42c); and to select the one of the second cells as the cell to be used for communications and to change the communication connection of the mobile terminal (1; 2; 4) from the first cell to the one of the second cells if judged affirmative and to select the first cell as the cell to be used for communications and to not change the communication connection of the mobile terminal (1; 2; 4) if judged negative, characterized in that the plurality of second cells (42a, 42b, 42c) having a coverage under the first cell's coverage; the cell change judgment parameters having a number of patterns that is less than a number of the second cells (42a, 42b, 42c), the mobile terminal (1; 2; 4) further being adapted to determine, from the number of patterns of parameters included in the read cell selection information, a parameter to be used for making a judgment on cell selection of the one of the second cells (42a, 42b, 42c) based on the broadcast information of the second cell; and the judgment is made based on the determined parameter. a first cell of the network using a first communication protocol; a plurality of second cells (42a, 42b, 42c) of the network, the plurality of second cells (42a, 42b, 42c) using a second communication protocol that is different from the first communication protocol; and the mobile terminal (1; 2; 4), wherein the mobile terminal (1; 2; 4) is adapted to support the first and second communication protocols in the first and second cells, wherein broadcast information including cell selection information is transmitted in the first cell, the cell selection information including cell change judgment parameters, wherein, in each of the second cells, broadcast information is transmitted, and wherein the mobile terminal (1; 2; 4) is adapted to receive the broadcast information of the first cell and the broadcast information of one of the second cells (42a, 42b, 42c); to read the cell selection information from the broadcast information of the first cell; to judge whether or not to change a communication connection of the mobile terminal (1; 2; 4) from the first cell to the one of the second cells (42a, 42b, 42c); and to select the one of the second cells as the cell to be used for communications and to change the communication connection of the mobile terminal (1; 2; 4) from the first cell to the one of the second cells if judged affirmative and to select the first cell as the cell to be used for communications and to not change the communication connection of the mobile terminal (1; 2; 4) if judged negative, characterized in that the plurality of second cells (42a, 42b, 42c) having a coverage under the first cell's coverage; the cell change judgment parameters having a number of patterns that is less than a number of the second cells (42a, 42b, 42c), the mobile terminal (1; 2; 4) further being adapted to determine, from the number of patterns of parameters included in the read cell selection information, a parameter to be used for making a judgment on cell selection of the one of the second cells (42a, 42b, 42c) based on the broadcast information of the second cell; and the judgment is made based on the determined parameter.