JP2016178469A - Communication apparatus, communication method and communication program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable increased possibility of preventing call connection from being hindered by securing an address on a communication path for emergency, even when call connection traffic increases in the emergency.SOLUTION: A communication apparatus records, when establishing a communication path between itself and a terminal, information in which an address on a communication path allocated to the terminal is associated with information enabling identification of the type of the communication path, and determines, when there is a terminal registration request from the terminal concerned, whether there is a record on information corresponding to information in which the address on the communication path of the terminal is associated with information which enables identification of the type of the communication path through which the registration request is made. When not determining that there is the record of the corresponding information, the registration related to the request is not performed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication device, a communication method, and a communication program that provide call connection for emergency.

  In the event of an emergency such as a disaster, many users try to communicate at the same time, resulting in traffic congestion that makes it difficult to send and receive regular emails and make calls, and communications do not function as usual. There is a case. This occurs because a large number of users try to communicate all at once, resulting in a shortage of dedicated traffic channels necessary for transmitting and receiving user data.

  As a method for solving this problem, in an IMS network that provides an emergency call connection, an emergency PDN is established with a terminal used for emergency in addition to a normal PDN. The contents are disclosed (see Non-Patent Document 1). Here, IMS is IP Multimedia Subsystem, and PDN is Packet Data Network. In this method, an emergency call connection signal is distributed by an emergency PDN.

  In the method described in Non-Patent Document 1, the emergency bearer service PDN is prohibited from being used for purposes other than emergency use. As for the prohibition method, only a specific IP address range is allocated to the emergency bearer service PDN. Further, the IP address band is registered and held in the proxy call session control function (hereinafter referred to as “P-CSCF”). Thereby, when the P-CSCF receives a normal registration request from the terminal, it detects whether the PDN for the emergency bearer service is designated.

  On the other hand, there are Patent Literature 1 and Patent Literature 2 as the technology related to the technology of Non-Patent Literature 1.

  In Patent Document 1, when a packet data connection is an emergency packet data connection during the establishment of the packet data connection, an Internet protocol (hereinafter referred to as “IP”) address assigned to the emergency packet data connection is specified by the user. The technique to designate is disclosed.

  In Patent Document 2, it is determined whether or not the user is registered for the emergency service, and the user is registered in the emergency service based on the determination, and the user is registered in the emergency service. A technique for transmitting an instruction indicating the above is disclosed.

  On the other hand, in connection with the present invention, Non-Patent Document 2 describes a procedure for establishing a connection by a PDN described later, and Non-Patent Document 3 describes a procedure for assigning an IP address described later in Non-Patent Documents 4 and 5. Discloses a procedure for REGISTER described later.

International Publication No. 2012/025151 International Publication No. 2012/110350

3GPP TS 24.229, B.I. 3.2.3, “Prohibited usage of PDN connection for emergency bearer services”. 3GPP TS 23.401, 5.10.2, “UE requested PDN connectivity”. 3GPP TS 23.401, 4.3.3.12.8, “IP Address Allocation”. 3GPP TS 23.228, “IP Multimedia Subsystem (IMS)”. 3GPP TS 24.229, “IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP)”.

  However, in the technique described in Non-Patent Document 1 and the techniques disclosed in Patent Document 1 and Patent Document 2 on the premise thereof, the IP address of the emergency PDN terminal is limited to a specific address range. Is done. Furthermore, it is necessary to register in advance a predetermined device (P-CSCF device) with an IP address assigned to the terminal within the specific range. For this reason, when call connection traffic increases in an emergency such as a large-scale disaster, there is a high risk that the emergency IP connection will be insufficient and the call connection in an emergency will be hindered.

  The present invention can increase the possibility that even if call connection traffic increases in an emergency, an address on the communication path for emergency can be secured and the call connection is not hindered. An object is to provide a communication device, a communication method, and a communication program.

  When establishing a communication route with a terminal, the communication device of the present invention associates an address on the communication route assigned to the terminal with information that enables identification of the type of the communication route. A recording unit for recording the information. The communication device of the present invention can further identify the address on the communication path of the terminal and the type of the communication path for which the registration is requested when a registration request for the terminal is made from a certain terminal. A registration processing unit for determining whether the recording of the information corresponding to the information associated with the information to be stored is in the recording unit. If the registration processing unit does not determine that the corresponding information is recorded in the recording unit, the registration processing unit does not perform the registration related to the request.

  The communication apparatus or the like of the present invention does not limit the address on the communication path (hereinafter referred to as “NW address”) assigned to a terminal used in an emergency in a specific range. Further, the communication device or the like of the present invention does not register in advance a NW address in the specific range that is allocated to the emergency terminal. Therefore, it is possible to increase the degree of freedom in selecting an NW address assigned to a terminal used in an emergency.

It is a conceptual diagram showing the structure of the communication apparatus of 1st embodiment. It is a conceptual diagram showing the structure of the information processing apparatus of 2nd embodiment. It is a conceptual diagram showing the processing flow of the communication apparatus of 2nd embodiment. It is a conceptual diagram showing the structure of the communication apparatus of 3rd embodiment. It is a conceptual diagram showing the processing flow of the communication apparatus of 3rd embodiment.

[Assumption]
In the mode for carrying out the present invention, the following is assumed.

  -After establishing a communication path between this communication apparatus and the terminal outside this communication apparatus, this communication apparatus registers about the terminal. This registration enables communication between the communication device and the terminal.

  Here, the establishment of the communication path between the communication apparatus and the terminal means that the communication path and the type thereof are determined between the communication apparatus and the terminal. For example, the location information (address, etc.) of the terminal and the main part of the communication route (gateway, etc.) is determined (allocated), and the type of communication route (emergency or non-emergency described later) is determined. Including defining.

  In addition, the registration performed by the communication apparatus includes registration performed by the communication apparatus in cooperation with a configuration other than the communication apparatus.

  The types of communication paths for establishing a connection between the communication device of the present invention and the terminal include at least two types other than emergency and emergency.

The information sent to this communication device when a terminal requests registration regarding the emergency communication path is information that enables identification that the registration requested by the terminal is an emergency communication path. Including. The inclusion of information enabling this identification includes the fact that the identification is possible due to the absence of certain information.
<First embodiment>
This embodiment is an embodiment of the minimum communication device of the present invention.
[Configuration and operation]
FIG. 1 is a conceptual diagram showing the configuration of the communication apparatus according to the present embodiment.

  The communication apparatus 001 of this embodiment includes a connection establishment unit 002, a recording unit 003, and a registration processing unit 004.

  The connection establishment unit 002 is connected to a terminal (not shown) outside the communication device 001 via a network (not shown) outside the communication device 001. The connection establishment unit 002 establishes a communication path for communicating with the terminal. The connection establishment unit 002 is capable of identifying the NW address assigned to the terminal and the type of communication path established with the terminal (hereinafter referred to as “identification information”). Is sent to the recording unit 003.

  The recording unit 003 records the information sent from the connection establishment unit 002.

When the registration processing unit 004 receives a registration processing request for the terminal from the terminal, the information associated with the NW address of the terminal and the identification information related to the registration of the terminal requested by the terminal is: It is determined whether it is recorded in the recording unit 003. The registration processing unit 004 does not perform registration when it is not determined that the associated information is recorded in the recording unit 003.
[effect]
The communication device of the present invention does not limit the NW address assigned to the terminal used in an emergency to a specific range. Further, the communication device or the like of the present invention does not register in advance a NW address in the specific range that is allocated to the emergency terminal. Therefore, it is possible to increase the degree of freedom in selecting an NW address assigned to a terminal used in an emergency.
<Second embodiment>
This embodiment is an embodiment of a processing flow in the communication apparatus of the first embodiment.
[Configuration and operation]
FIG. 2 is a conceptual diagram showing the configuration of the information processing apparatus of this embodiment.

  The communication apparatus 001 of this embodiment includes a connection establishment unit 002, a recording unit 003, and a registration processing unit 004.

  The connection establishment unit 002 is connected to a terminal 005 external to the communication device 001 via a network 006 external to the communication device 001. The connection establishment unit 002 establishes a communication path for performing communication with the terminal 005. The establishment includes assignment of an NW address to the terminal 005. The connection establishing unit 002 sends information that associates the NW address assigned to the terminal 005 and the identification information related to the type of communication path established with the terminal 005 to the recording unit 003.

  The recording unit 003 records the information sent from the connection establishment unit 002.

When the registration processing unit 004 receives a request for registration processing for the terminal 005 from the terminal 005, the information that associates the NW address of the terminal 005 with the identification information related to the registration of the terminal 005 requested by the terminal 005, It is determined whether it is recorded in the recording unit 003. If it is determined that the associated information is not recorded in the recording unit 003, the registration processing unit 004 does not perform registration.
[Processing flow]
FIG. 3 is a conceptual diagram showing a processing flow of the communication apparatus of this embodiment.

  First, at the time of start, a user of the terminal 005 makes a request to establish a communication path between the communication device 001 and the terminal 005. The request includes information regarding the type of communication path (such as emergency or other than emergency) for which a communication path between the communication device 001 and the terminal 005 is to be established.

The connection establishment unit 002 establishes a communication path between the communication device 001 and the terminal 005 in response to the request from the user of the terminal 005. At this time, the connection establishment unit 002 assigns an NW address to the terminal 005 and specifies the type of communication path for establishing a connection with the terminal 005 included in the request from the user of the terminal 005 To do. The NW address for the allocated terminal 005 and the type of communication path for establishing a connection with the terminal 005 are associated with each other and sent to the recording unit 003. (S201)
Next, the recording unit 003 records identification information related to the type of communication path for establishing a connection with the terminal 005, which is associated with the NW address for the terminal 005, sent from the connection establishing unit 002. (S202)
Then, the registration processing unit 004 determines whether a registration request for the terminal 005 has been received from the terminal 005. (S203)
In S203, when the registration processing unit 004 does not determine that a registration request for the terminal 005 has been received from the terminal 005 (when the result of S203 is no), the process proceeds to S203.

  On the other hand, if it is determined in S203 that the registration processing unit 004 has received a registration request for the terminal 005 from the terminal 005 (if the result of S203 is yes), the process proceeds to the next.

It is determined whether the content that matches the set of the NW address of the terminal 005 and the type of communication path is recorded in the recording unit 003. Here, the type of communication path is information included in the request content related to the registration request for the terminal 005. (S204)
In S204, when it is determined that the content that matches the set of the NW address of the terminal 005 and the type of the communication path is recorded in the recording unit 003 (when the result of S204 is yes, the process proceeds to S205).

  If it is not determined in step S204 that the content matching the set of the NW address of the terminal 005 and the type of communication path is recorded in the recording unit 003, the process ends.

Next, the registration processing unit 004 performs registration for the terminal 005. (S005)
Then, the process ends.
[effect]
The communication apparatus according to the present embodiment identifies the NW address and the communication type when establishing a communication path with the terminal for a certain type of communication path in response to a request from a user of the terminal. Is recorded in the recording unit. The NW address is an NW address that the communication device assigns to the terminal in order to establish the type of communication path for the terminal.

  And the communication processing apparatus of this embodiment performs determination, when there exists a request | requirement of registration of the communication path | route about the terminal from a certain terminal. The determination is made as to whether or not the recording unit has a record of information corresponding to the information associated with the NW address of the terminal and the information enabling identification of the type of communication path for which the registration is requested. It is. Then, when it is determined that there is a record of information corresponding to the associated information in the recording unit, the communication processing apparatus of the present embodiment registers the communication path.

  The communication apparatus according to the present embodiment limits the NW address assigned to a terminal that establishes and registers a communication path of an emergency type to a specific range and registers it in a predetermined apparatus before establishing the communication path. Do not do. Therefore, even if there are many requests for establishing an emergency communication path for a terminal, there is no limitation on the allocation of NW addresses allocated to the terminal. Let us consider a case where registration of the range of the NW address to be assigned to a terminal that establishes an emergency communication path is necessary before the communication path is established. In such a case, all the NW addresses in the range of the NW address assigned to the terminal that establishes the emergency communication path may be assigned to other terminals. In this case, the communication apparatus cannot assign the NW address of the emergency communication path to the terminal even if the terminal requests establishment of the emergency PDN path. The communication apparatus according to the present embodiment does not limit the range of the NW address to a specific range before establishing the communication path.

Therefore, the communication apparatus according to the present embodiment can increase the degree of freedom in selecting an NW address to be assigned to a terminal used for emergency call connection such as during a large-scale disaster.
<Third embodiment>
This embodiment is an embodiment of a communication apparatus that can be applied to IMS using a wireless network that provides an emergency call connection.
[Configuration and operation]
FIG. 4 is a conceptual diagram showing the configuration of the communication apparatus of this embodiment.

  The communication apparatus 301 according to the present embodiment includes a connection establishment unit 302, a recording unit 303, and a registration processing unit 304.

  The connection establishment unit 302 includes a P-CSCF 311 and a PGW 312. Here, “P-CSCF” is a configuration having a proxy call session control function in IMS as described in the technical specifications of 3GPP. “PGW” is a Packet Data Network Gateway, and is a gateway device serving as a connection point with a PDN outside the core network in the IMS. The PGW performs assignment of an IP address to the UE, which will be described later, and accommodates 3GPP access and non-3GPP access.

  The registration processing unit 304 includes a PCRF 313. Here, the PCRF is configured to have Policy and Charging Rules Function in IMS, which is described in the technical specifications of 3GPP. The PCRF is a policy control apparatus that determines policy control and charging control rules such as QoS applied in the PGW. The PGW performs policy control on a packet basis based on notification information from the PCRF.

  The PGW 312 is connected to the UE 305 outside the communication apparatus 301 via the wireless network 306 outside the communication apparatus 301. Here, “UE” is User Equipment, which is a communication terminal in IMS, described in the technical specifications of 3GPP. The PGW 312 is connected to the AS 316 outside the communication device 301. Here, the AS 316 is an Application Server that provides an application to the UE 305 when communication by the PSN between the UE 305 and the communication apparatus becomes possible. “AS” is described in the 3GPP technical specifications.

  The P-CSCF 311 and the PGW 312 establish a PDN connection with the UE by the method described in Non-Patent Document 2. The establishment includes assignment of an IP address to the UE 305 and designation of the type of PDN established with the UE 305. Then, the PGW 312 sends information relating the NW address assigned to the UE 305 and the identification information related to the type of PDN established between the UE 305 to the recording unit 303. Here, the types of PDN typically include two types, emergency and normal.

  The recording unit 303 records information transmitted from the connection establishment unit 302.

  When the UE 305 makes a REGISTER request to the PCRF 313 of the registration processing unit 304 and the PCRF 313 receives the REGISTER request, the PCRF 313 accesses the recording unit 303. REGISTER is a kind of terminal registration described in the first embodiment and the second embodiment for the UE 305, and the procedure is described in Non-Patent Document 4 and Non-Patent Document 5. The access path at that time is arbitrary, but for example, it is performed via the PGW 312. Then, it is determined whether information relating the IP address of the UE 305 that has made the REGISTER request and the identification information related to the type of PDN that the REGISTER request requests registration is recorded in the recording unit 303.

In the above determination, if information relating the identification information related to the type of PDN for which the REGISTER request requests registration is recorded in the recording unit 303, the REGISTER process related to the REGISTER request is performed.
[Processing flow]
FIG. 5 is a conceptual diagram showing the processing flow of the communication apparatus of this embodiment.

First, the P-CSCF 311 and the PGW 312 establish a PDN connection with the UE 305. At this time, the P-CSCF 311 and the PGW 312 specify the NW address for the UE 305 and the type of PDN for establishing a connection with the UE 305. Information that associates the IP address of the designated UE 305 with the type of PDN that establishes a connection with the UE 305 is sent to the recording unit 303. (S201)
Next, the recording unit 303 records identification information related to the type of PDN that establishes a connection with the UE 305 and is associated with the NW address for the UE 305 sent from the PGW 312. (S202)
Thereafter, the PCRF 313 determines whether a REGISTER request for the UE 305 has been received from the UE 305. (S203)
In S203, when the PCRF 313 does not determine that a REGISTER request for the UE 305 has been received from the UE 305, the process proceeds to S203.

  On the other hand, if the PCRF 313 determines in step S203 that the UE 305 has received a REGISTER request for the UE 305, the process proceeds to the next step.

It is determined whether the content that matches the set of the IP address of the UE 305 and the type of the PDN is recorded in the recording unit 303. Here, the type of PDN is information included in the request content related to the REGISTER request for the UE 305. (S204)
If it is determined in S204 that the content matching the set of the IP address of the UE 305 and the type of PDN is recorded in the recording unit 303, the process proceeds to S205.

  If it is not determined in S204 that the content matching the set of the IP address of the UE 305 and the type of PDN is recorded in the recording unit 303, the process ends.

Next, the PCRF 313 performs REGISTER processing for the UE 305. (S205)
And the communication apparatus 301 complete | finishes this process.
[effect]
When establishing a PDN route with a UE for a certain type of PDN route in response to a request from a user of the UE or the like, the communication device according to the present embodiment determines the IP address and the type of the PDN route. Information that associates information enabling identification is recorded in the recording unit. The IP address is an IP address assigned by the communication apparatus to establish the type of PDN path for the UE.

  And the communication processing apparatus of this embodiment performs determination, when there exists a REGISTER request | requirement of the PDN path | route about the UE from a certain UE. The determination is made as to whether or not the recording unit has a record of information corresponding to the information relating the IP address of the UE and the information enabling identification of the type of the PDN route for which the REGISTER request has been made. It is. Then, when it is determined that there is a record of information corresponding to the associated information in the recording unit, the communication processing apparatus of the present embodiment performs REGISTER of the PDN path.

  The communication device of this embodiment establishes a PDN route that is of an emergency type and restricts the IP address assigned to the UE performing REGISTER to a specific range and registers it in the P-CSCF device before establishing the PDN route. Do not do that. Therefore, even if there are many requests for establishing an emergency PDN route for a UE, there is no restriction on assignment of IP addresses assigned to the UE. Consider a case where registration of a range of IP addresses to be allocated to a UE that establishes an emergency PDN path is necessary before the PDN path is established. In such a case, all of the IP addresses in the range of IP addresses assigned to the UE that establishes the emergency PDN route may be assigned to other UEs. In that case, the communication apparatus cannot assign the IP address of the emergency PDN route to the UE even if the UE requests establishment of the emergency PDN route. The communication apparatus according to the present embodiment does not limit the range of the IP address assigned to the UE for the emergency PDN path before the establishment of the PDN path.

  Therefore, the communication apparatus according to the present embodiment can increase the degree of freedom in selecting an IP address assigned to a terminal used for emergency call connection such as in a large-scale disaster.

  Furthermore, the communication apparatus according to the present embodiment is characterized by using wireless communication. Since wireless communication is not disconnected due to the occurrence of a disaster such as an earthquake unlike wired communication, there is a higher possibility that communication can be established even after the occurrence of a disaster. Therefore, it is possible to further increase the possibility that there is no problem in emergency call connection.

  Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments, and various modifications can be made within the scope of the technical idea.

Moreover, although a part or all of said embodiment may be described also as the following additional remarks, it is not restricted to the following.
(Appendix 1)
A recording unit that records information in association with an address on a communication path assigned to the terminal and information that enables identification of the type of the communication path when establishing a communication path with the terminal When,
When a registration request for a terminal is received from a terminal, the address on the communication path of the terminal is associated with information that enables identification of the type of communication path for which the registration request is made If the recording of information corresponding to the information is in the recording unit, and if it is not determined that the recording of the corresponding information is in the recording unit, the registration according to the request is not performed. A processing unit;
A communication device comprising:
(Appendix 2)
The communication apparatus according to appendix 1, wherein the registration processing unit performs the registration related to the request when it is determined that the corresponding information is recorded in the recording unit.
(Appendix 3)
The communication apparatus according to appendix 1 or appendix 2, wherein the communication path is a wireless communication path.
(Appendix 4)
The communication apparatus according to any one of appendices 1 to 3, wherein the communication path is a packet data network communication path.
(Appendix 5)
The communication apparatus according to any one of appendices 1 to 4, wherein the registration processing unit includes a configuration having a Policy and Charging Rules Function.
(Appendix 6)
The communication apparatus according to any one of appendices 1 to 5, further comprising a connection establishment unit that assigns the address to the terminal and establishes a communication path with the terminal.
(Appendix 7)
The communication apparatus according to appendix 6, wherein the connection establishment unit includes a configuration having a proxy call session control function and a packet data network gateway.
(Appendix 8)
A step of recording information in association with an address on a communication path assigned to the terminal and information enabling identification of the type of the communication path when establishing a communication path with the terminal Including
Information that associates the address on the communication path of the terminal with information that enables identification of the type of communication path for which the registration is requested when a registration request is received from that terminal. A communication method that determines whether or not the recording of the information corresponding to has been performed, and does not perform the registration according to the request when it is not determined that the recording of the corresponding information has been performed.
(Appendix 9)
The communication method according to appendix 8, wherein the registration related to the request is performed when it is determined that the corresponding information is recorded.
(Appendix 10)
When establishing a communication path with a terminal, a process including a process of recording an address on the communication path assigned to the terminal and information enabling identification of the type of the communication path is stored in the computer. Let it run
Information that associates the address on the communication path of the terminal with information that enables identification of the type of communication path for which the registration is requested when a registration request is received from that terminal. If the recording of the information corresponding to the request has been performed, and if it has not been determined that the recording of the corresponding information has been performed, the computer does not execute the process of performing the registration related to the request, program.
(Appendix 11)
The communication program according to appendix 10, which causes a computer to execute processing including the registration related to the request when it is determined that the corresponding information is recorded.

001, 301 Communication device 002, 302 Connection establishment unit 003, 303 Recording unit 004, 304 Registration processing unit 005 Terminal 006 Network 305 UE
306 Wireless network 311 P-CSCF
312 PGW 313 PCRF
316 AS

Claims (10)

A record for recording information associated with an address on a communication path assigned to the terminal and information that enables identification of the type of the communication path when establishing a communication path with the terminal And
When there is a registration request about itself from a certain terminal, an address on the communication path of the terminal that has made the request, and information that enables identification of the type of communication path for which the registration request has been made, If it is determined whether there is a record of information corresponding to the associated information in the recording unit, and if it is not determined that the record of the corresponding information is in the recording unit, the registration related to the request is not performed A registration processing unit;
A communication device comprising:   The communication apparatus according to claim 1, wherein the registration processing unit performs the registration related to the request when it is determined that the corresponding information is recorded in the recording unit.   The communication apparatus according to claim 1, wherein the communication path is a wireless communication path.   The communication apparatus according to any one of claims 1 to 3, wherein the communication path is a communication path based on a packet data network.   The communication apparatus as described in any one of Claims 1 thru | or 4 provided with the structure in which the said registration process part has Policy and Charging Rules Function.   The communication apparatus according to claim 1, further comprising a connection establishment unit that assigns the address to the terminal and establishes a communication path with the terminal.   The communication apparatus according to claim 6, wherein the connection establishment unit includes a configuration having a proxy call session control function and a packet data network gateway. When establishing a communication path with a terminal, record information in which an address on the communication path assigned to the terminal is associated with information enabling identification of the type of the communication path Including steps,
When there is a registration request about itself from a certain terminal, the address on the communication path of the terminal that made the request, and information that makes it possible to identify the type of communication path for which the registration request was made, A communication method that determines whether or not the recording of the information corresponding to the associated information is performed, and does not perform the registration according to the request when it is not determined that the recording of the corresponding information is performed .   The communication method according to claim 8, wherein, when it is determined that the corresponding information is recorded, the registration related to the request is performed. When establishing a communication path with a terminal, record information in which an address on the communication path assigned to the terminal is associated with information enabling identification of the type of the communication path Cause the computer to execute processing including processing,
When there is a registration request about itself from a certain terminal, the address on the communication path of the terminal that made the request and information that makes it possible to identify the type of communication path that requested the registration. A communication program that determines whether or not the corresponding information has been recorded, and does not cause the computer to execute the registration according to the request when it is not determined that the corresponding information has been recorded.

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