COMMUNICATION APPARATUS, TERMINAL, AND COMMUNICATION METHOD

• US 20180184277A1
• Filed: 06/27/2016
• Published: 06/28/2018
• Est. Priority Date: 06/26/2015
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: SUZUKI, Naoaki, TOSHIYUKI, Tamura
• Granted Patent: US 10,327,126 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1033 Signalling gateways
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

A communication apparatus includes a location information acquisition unit that acquires location information of a terminal, a reception unit that receives a call request transmitted by the terminal, a service identification unit that identifies a service of the request based on the location information of the terminal and a destination telephone number of the request, and a transmission unit that transmits a response to the terminal, when the service corresponding to the request cannot be provided

Claims

1. A communication apparatus comprising:

a location information acquisition unit that acquires location information of a terminal;

a reception unit that receives a call request transmitted by the terminal;

a service identification unit that identifies a service of the request based on the location information of the terminal and a destination telephone number of the request; and

a transmission unit that transmits a response to the terminal, when the service corresponding to the request cannot be provided.

2. The communication apparatus according to claim 1, wherein the response includes information on the service of the request.

3. The communication apparatus according to claim 2, wherein the response includes information designating a domain able to provide the service of the request or a domain unable to provide the service.

4. The communication apparatus according to claim 1, wherein the communication apparatus includes an apparatus configured to control a call of IMS (IP (Internet Protocol) Multimedia Subsystem) belonging to a PS (packet exchange) domain on a home network side and to receive the request transmitted by the terminal with a call mode of VoLTE (Voice over LTE (Long Term Evolution) Protocol) at a roaming destination.

5. The communication apparatus according to claim 4, wherein the location information acquisition unit acquires location information of the terminal, from a management node and/or a gateway in a packet core network belonging to a PS (packet switching) domain on the home network side, to which the IMS belonging to the PS (packet switching) domain on the home network side connects.

6. The communication apparatus according to claim 5, wherein the gateway is a PGW (Packet Data Network (PDN) gateway) that assigns an IP address to the terminal, and wherein

the management node is a Policy and Charging Rule Function (PCRF) that manages a policy and a charging rule.

7. The communication apparatus according to claim 1, wherein the service of the request includes an emergency call.

8. A terminal comprising:

a transmission unit that transmits a call request to a first communication apparatus;

a reception unit that receives, from the first communication apparatus, a response including information indicating that the request is not accepted, and a service of the request identified by the first communication apparatus; and

a retransmission unit that selects a second communication apparatus belonging to a domain other than a domain to which the first communication apparatus belongs, based on the information included in the response and that transmits, to the second retransmission unit, a call request for receiving the service of the request.

9. The terminal according to claim 8, wherein the response further includes information designating a domain that can provide a service of the request or a domain that cannot provide the service.

10. The terminal according to claim 8, wherein the transmission unit transmits the request in a call mode of VoLTE (Voice over LTE (Long Term Evolution)) to the first communication apparatus of an IMS (IP (Internet Protocol) Multimedia Subsystem) belonging to a PS (packet switching) domain on a home network side, from a roaming destination of the terminal, and

the retransmission unit selects a second communication apparatus belonging to a CS (circuit switching) domain of the roaming destination, and transmits to the second communication apparatus a call request for receiving a service corresponding to the request transmitted to the first communication apparatus.

11. The terminal according to claim 8, wherein the service of the request includes an emergency call.

12. A communication method by a communication apparatus, comprising:

acquiring location information of a terminal,

receiving a call request transmitted by the terminal, identifying a service of the request based on the location information of the terminal and a destination telephone number of the request, and

transmitting a response to the terminal, when the service cannot be provided for the location information.

13. The communication method according to claim 12, comprising

the communication apparatus putting information on the service of the request in the response.

14. The communication method according to claim 12, comprising

the communication apparatus putting in the response information designating a domain that can provide a service of the request or a domain that cannot provide the service.

15. The communication method according to claim 12, wherein the communication apparatus is an apparatus controlling a call of IMS (IP (Internet Protocol) Multimedia Subsystem) belonging to a PS (packet exchange) domain on a home network side, which receives the request transmitted by the terminal at a roaming destination in a call mode of VoLTE (Voice over LTE (Long Term Evolution) Protocol).

16. The communication method according to claim 15, comprising

the communication apparatus acquiring location information of the terminal from a management node and/or a gateway in a packet core network belonging to a PS (packet switching) domain on the home network side, to which an IMS belonging to the PS (packet switching) domain on the home network side connects.

17. The communication method according to claim 16, wherein the gateway is a PGW (Packet Data Network (PDN) gateway) that assigns an IP address to the terminal, and

wherein the management node is a Policy and Charging Rule Function (PCRF) that manages a policy and a charging rule.

18. A communication method by a terminal, comprising:

transmitting a call request to a first communication apparatus;

receiving a response including information indicating that the request is not accepted from the first communication apparatus and information indicating a service of the request identified by the first communication apparatus;

selecting a second communication apparatus belonging to a domain other than the domain to which the first communication apparatus belongs, based on the information; and

transmitting to the second communication apparatus a call request for receiving the service of the request transmitted to the first communication apparatus.

19. The communication method according to claim 18, wherein the response further includes information designating a domain that can provide the service of the request or a domain that cannot provide the service.

20. The communication method according to claim 18, comprising:

the terminal transmitting the request in a call mode of VoLTE (Voice over LTE (Long Term Evolution)) to the first communication apparatus of an IMS (IP (Internet Protocol) Multimedia Subsystem) belonging to a PS (packet switching) domain on a home network side from a roaming destination of the terminal, and

the terminal selecting a second communication apparatus belonging to a CS (circuit switching) domain of the roaming destination, and transmits to the second communication apparatus a call request for receiving a service corresponding to the request transmitted to the first communication apparatus.

21. The communication method according to claim 18, wherein the service of the request includes an emergency call.