Patent ID: 8149749

Claim:
A mobile communications system comprising: a mobile terminal, which is capable of transitioning to a temporary data transmission stop period during which said mobile terminal temporarily stops transmission of data and separately transitioning to a temporary reception stop period during which said mobile terminal temporarily stops reception of data, that judges whether or not said mobile terminal is able to make a transition to the temporary data transmission stop period, and, when said mobile terminal is able to make a transition to the temporary transmission stop period, said mobile terminal transmits a notification to a base station that said mobile terminal is able to make a transition to the temporary transmission stop period; and said base station that receives the notification from the mobile terminal that the mobile terminal is able to make a transition to the temporary transmission stop period, makes a judgment on whether or not said mobile terminal is able to make a transition to the temporary reception stop period, transmits a result of the judgment to the mobile terminal, and temporarily stops supply of electric power to data transmission processing units and data reception processing units when said base station judges that said mobile terminal is able to make a transition to the temporary reception stop period, wherein when the mobile terminal receives the result of the judgment from the base station that the mobile terminal is able to make a transition to the temporary reception stop period, the mobile terminal transitions to both the temporary data transmission stop period and the temporary reception stop period, and when the mobile terminal receives the result of the judgment from the base station that the mobile terminal is not able to make a transition to the temporary reception stop period the mobile terminal transitions to the temporary data transmission stop period but not the temporary reception stop period.