Abstract: A mobile radio apparatus receives a broadcast signal transmitted from at least one base-transceiver station corresponding to a cell around a position of the mobile radio apparatus, obtains from the received broadcast signal a cell identifier for the cell and a cell flag for identifying whether or not the cell is a small cell or a macro cell, stores the obtained cell identifier and cell flag in a cell list, confirms a service quality class for a service of call connection target communication, determines whether or not the service desires a high throughput by using the confirmed service quality class when the cell list includes a cell flag representing a small cell, selects a macro cell from the cell list when it is determined that the service does not desire a high throughput, and transmits a call connection request signal to a base-transceiver station corresponding to the selected macro cell.

Abstract: A mobile radio apparatus receives a broadcast signal transmitted from at least one base-transceiver station corresponding to a cell around a position of the mobile radio apparatus, obtains from the received broadcast signal a cell identifier for the cell and a cell flag for identifying whether or not the cell is a small cell or a macro cell, stores the obtained cell identifier and cell flag in a cell list, confirms a service quality class for a service of call connection target communication, determines whether or not the service desires a high throughput by using the confirmed service quality class when the cell list includes a cell flag representing a small cell, selects a macro cell from the cell list when it is determined that the service does not desire a high throughput, and transmits a call connection request signal to a base-transceiver station corresponding to the selected macro cell.

Abstract: A communication control apparatus includes a processor that is configured to determine a congestion state of uplink communication of a base station; and cause a mobile station that attempts to establish connection to the base station while increasing transmission power stepwise from an initial value, to set the initial value to be a first value, upon determining the congestion state to be a first congestion state and to set the initial value to be a second value that is greater than the first value, upon determining the congestion state to be a second congestion state that is heavier than the first congestion state.

Abstract: A communication control apparatus includes a processor that is configured to determine a congestion state of uplink communication of a base station; and cause a mobile station that attempts to establish connection to the base station while increasing transmission power stepwise from an initial value, to set the initial value to be a first value, upon determining the congestion state to be a first congestion state and to set the initial value to be a second value that is greater than the first value, upon determining the congestion state to be a second congestion state that is heavier than the first congestion state.