Mobile communication system, mobile station, call control device, and mobile communication method

• US 9,538,354 B2
• Filed: 09/12/2014
• Issued: 01/03/2017
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Tanaka, Itsuma, Takeda, Shinya
• Primary Examiner(s): LE, DANH C
• Application Number:
  US15/022,470
• Publication Number:
  US 20160227391A1
• Time in Patent Office: 844 Days
• Field of Search: 455/404.2, 455/550.1, 455/418, 379/45
• US Class Current: 1/1
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 3/5116 for emergency applications
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

The invention provides a mobile communication system, a mobile station, a call control device, and a mobile communication method that are capable of allowing an emergency call, even to which a prefix indicating how to treat the emergency call is added, to break through access control, and applying priority control to the emergency call, as in the case of a normal emergency call without the addition of the prefix. UE (100) separates acquired calling number information into a prefix and a calling number, and sends an MSC (210) an Emergency Setup which includes the prefix and an Emergency Category linked with the calling number. The MSC (210) determines how to treat the emergency call (such as to block notification of a telephone number of a calling party) based on the prefix included in the Emergency Setup, and connects the emergency call to a PSAP (400) corresponding to the Emergency Category.

Claims

1. A mobile communication system comprising:

a mobile station; and

a call control device configured to control connection of an emergency call initiated by the mobile station, wherein

the mobile station includes

a calling number information acquisition unit configured to acquire calling number information including

a prefix indicating how to treat the emergency call, and

a calling number being a telephone number of a called party,

a prefix/calling number separation unit configured to separate the calling number information acquired by the calling number information acquisition unit into the prefix and the calling number, and

an emergency call transmission unit configured to send the call control device the emergency call in the form of an emergency call transmission signal including the prefix separated by the prefix/calling number separation unit, and an emergency call type linked with the calling number, and

the call control device includes

an emergency call reception unit configured to receive from the mobile station the emergency call in the form of the emergency call transmission signal,

a prefix/call type identification unit configured to identify the prefix and the emergency call type included in the emergency call transmission signal, and

an emergency call control unit configured to determine how to treat the emergency call based on the prefix identified by the prefix/call type identification unit, and to connect the emergency call to an emergency call answering point corresponding to the emergency call type based on the emergency call type identified by the prefix/call type identification unit.

2. The mobile communication system according to claim 1, comprising a setting information holding unit configured to hold setting information on the prefix, wherein

the prefix/calling number separation unit separates the calling number information into the prefix and the calling number based on the setting information on the prefix held by the setting information holding unit.

3. The mobile communication system according to claim 1, wherein

the prefix indicates whether or not to notify the emergency call answering point of a telephone number of a calling party of the emergency call, and

when the prefix indicates a refusal to notify the emergency call answering point of the telephone number of the calling party, the emergency call control unit connects the emergency call to the emergency call answering point without notifying the emergency call answering point of the telephone number of the calling party.

4. A mobile station configured to initiate an emergency call, comprising:

a calling number information acquisition unit configured to acquire calling number information including

a prefix indicating how to treat the emergency call, and

a calling number being a telephone number of a called party;

a prefix/calling number separation unit configured to separate the calling number information acquired by the calling number information acquisition unit into the prefix and the calling number; and

an emergency call transmission unit configured to send a call control device configured to control connection of the emergency call, the emergency call in the form of an emergency call transmission signal including

the prefix separated by the prefix/calling number separation unit, and

an emergency call type linked with the calling number.

5. A call control device configured to control connection of an emergency call initiated by a mobile station, comprising:

an emergency call reception unit configured to receive from the mobile station the emergency call in the form of an emergency call transmission signal including

a prefix indicating how to treat the emergency call, and

an emergency call type linked with a calling number being a telephone number of a called party;

a prefix/call type identification unit configured to identify the prefix and the emergency call type included in the emergency call transmission signal; and

an emergency call control unit configured to determine how to treat the emergency call based on the prefix identified by the prefix/call type identification unit, and to connect the emergency call to an emergency call answering point corresponding to the emergency call type based on the emergency call type identified by the prefix/call type identification unit.

6. A mobile communication method implemented by a mobile station and a call control device configured to control connection of an emergency call initiated by the mobile station, the method comprising the steps of:

causing the mobile station to acquire calling number information including

a prefix indicating how to treat the emergency call, and

a calling number being a telephone number of a called party;

causing the mobile station to separate the acquired calling number information into the prefix and the calling number;

causing the mobile station to send the call control device the emergency call in the form of an emergency call transmission signal including

the separated prefix, and

an emergency call type linked with the calling number;

causing the call control device to receive from the mobile station the emergency call in the form of the emergency call transmission signal;

causing the call control device to identify the prefix and the emergency call type included in the emergency call transmission signal; and

causing the call control device to determine how to treat the emergency call based on the identified prefix, and to connect the emergency call to an emergency call answering point corresponding to the emergency call type based on the identified emergency call type.

7. A mobile communication system comprising:

a mobile station; and

a call control device configured to control connection of an emergency call initiated by the mobile station, wherein

the mobile station includes

a calling number information acquisition unit configured to acquire calling number information including

a prefix indicating how to treat the emergency call, and

a calling number being a telephone number of a called party, and

an emergency call transmission unit configured to send the call control device the emergency call in the form of an emergency call transmission signal including the prefix and the calling number acquired by the calling number information acquisition unit, and

the call control device includes

an emergency call reception unit configured to receive from the mobile station the emergency call in the form of the emergency call transmission signal,

a prefix/calling number identification unit configured to identify the prefix and the calling number included in the emergency call transmission signal, and

an emergency call control unit configured to determine how to treat the emergency call based on the prefix identified by the prefix/calling number identification unit, and to connect the emergency call to an emergency call answering point corresponding to the calling number based on the calling number identified by the prefix/calling number identification unit.

8. A mobile communication method implemented by a mobile station and a call control device configured to control connection of an emergency call initiated by the mobile station, the method comprising the steps of:

causing the mobile station to acquire calling number information including

a prefix indicating how to treat the emergency call, and

a calling number being a telephone number of a called party;

causing the mobile station to send the call control device the emergency call in the form of an emergency call transmission signal including

the acquired prefix, and

the acquired calling number;

causing the call control device to receive from the mobile station the emergency call in the form of the emergency call transmission signal;

causing the call control device to identify the prefix and the calling number included in the emergency call transmission signal; and

causing the call control device to determine how to treat the emergency call based on the identified prefix, and to connect the emergency call to an emergency call answering point corresponding to the calling number based on the identified calling number.