Radio terminal and base station notification method

1. A radio terminal capable of communication with a macrocell base station and a femtocell base station, comprising:

a search unit configured to search for the macrocell base station capable of communication while put in a waiting state in the femtocell base station which covers a communication dead zone of the macrocell base station;

a notifying unit configured to notify a user that an installation location belongs to a zone of the macrocell base station in a case where radio wave conditions of the macrocell base station are improved and the macrocell base station is found by the search unit;

a call request unit configured to perform a call request to the femtocell or macrocell base station in the case where radio wave conditions of the macrocell base station are improved and the macrocell base station is found by the search unit;

a table configured to store service information to be received by the user and information of a service base station in association with the service information, the service base station being the femtocell or macrocell base station; and

a switching instruction unit configured to instruct, in a case where the service base station differs from a waiting state base station in which the search unit is put in the waiting state, the call request unit to switch from the waiting state base station to the service base station, the waiting state base station being the femtocell or macrocell base station.

2. The radio terminal according to claim 1 , wherein a communication area of the femtocell base station is smaller than a communication area of the macrocell base station.

3. The radio terminal according to claim 1 , wherein the search unit regularly searches for the macrocell base station while put in a waiting state in the femtocell base station installed by the user.

4. The radio terminal according to claim 1 , further comprising a search instruction unit configured to instruct the search unit to regularly search for the macrocell base station capable of communication based on setting of the user.

5. The radio terminal according to claim 1 , further comprising a switching instruction unit configured to instruct the search unit to enter into a waiting state in the macrocell base station based on setting or instruction of the user.

6. The radio terminal according to claim 1 , wherein the switching instruction unit is further configured to instruct, in a case where the call request unit performs the call request to the waiting state base station but fails to access a server which provides service, the call request unit to perform the call request to the service base station.

7. The radio terminal according to claim 6 , wherein the service base station is the macrocell base station and the waiting state base station is the femtocell base station.

8. The radio terminal according to claim 6 , wherein the service base station is the femtocell base station and the waiting state base station is the macrocell base station.

9. The radio terminal according to claim 1 , wherein the service base station is the macrocell base station and the waiting state base station is the femtocell base station.

10. The radio terminal according to claim 1 , wherein the service base station is the femtocell base station and the waiting state base station is the macrocell base station.

11. A base station notification method of radio terminal capable of communication with a macrocell base station and a femtocell base station, comprising:

regularly searching, by a search unit, for the macrocell base station capable of communication while put in a waiting state in the femtocell base station which covers a communication dead zone of the macrocell base station;

notifying, by a notifying unit, in a case where radio wave conditions of the macrocell base station are improved and the macrocell base station is capable of communication is found, a user that an installation location belongs to a zone of the macrocell base station;

performing, by a call request unit, a call request to the femtocell or macrocell base station in the case where radio wave conditions of the macrocell base station are improved and the macrocell base station is found by the search unit;

storing service information at a table to be received by the user and information of a service base station in association with the service information, the service base station being the femtocell or macrocell base station; and

instructing, by a switching instruction unit, in a case where the service base station differs from a waiting state base station in which the search unit is put in the waiting state, the call request unit to switch from the waiting state base station to the service base station, the waiting state base station being the femtocell or macrocell base station.

12. The method according to claim 11 , wherein the service base station is the macrocell base station and the waiting state base station is the femtocell base station.

13. The method according to claim 11 , wherein the service base station is the femtocell base station and the waiting state base station is the macrocell base station.