JP2020167476A - Communication system, call control device, and communication method - Google Patents

Abstract

To discriminate whether a destination number of a call transmitted from a UE is an emergency call number without requiring the operational time and effort such as database setting on a network side.SOLUTION: Disclosed is a communication system which includes a mobile management device and a call control device. The mobile management device includes a transmission part which transmits an emergency number list to other devices based on the attach request from a user device. The call control device includes: a setting part which holds the emergency number list acquired from the other devices; a receiving part which receives the connection request including numbers from the user device; and a control part which determines whether the number is an emergency number by referring to the emergency number list.SELECTED DRAWING: Figure 6

Description

The present invention relates to a technique for a UE (User Equipment) to make an emergency call in a communication system.

At the time of making an emergency call, the UE makes an emergency call with an emergency call type of "Emergency Service Category" instead of the dialed emergency call number. The types of emergency calls include, for example, police, fire fighting, emergency, maritime, mountain rescue, and IoT equipment (automatic transmission of machines). The connection destination emergency agency or the like is specified by the emergency call type, and the UE can connect to the connection destination emergency agency.

By holding the information associated with the emergency call number and the emergency call type, the UE can recognize the dialed emergency call number as the emergency call number and make an emergency call with the emergency call type set. ..

Further, even if the UE does not recognize a certain emergency call number as an emergency call number and makes a normal call, the NW side indicates that the call using the number is intended for an emergency call. There is a mechanism to determine and urge the UE to resend as an emergency call.

3GPP TS 22.101 V15.6.0 (2018-09) 3GPP TS 24.008 V15.5.0 (2018-12) 3GPP TS 24.301 V15.5.0 (2018-12) 3GPP TS 24.229 V15.5.0 (2018-12) 3GPP TS 23.167 V15.4.0 (2018-12)

However, in order to realize the above mechanism, it is necessary to set all the latest emergency call numbers in the database on the network side. In particular, in order to respond to emergency call transmission during roaming, it is necessary to set the emergency call numbers of each country without omission, which requires manpower and requires a lot of time and effort for setting.

The present invention has been made in view of the above points, and whether or not the destination number of the call sent from the UE is an emergency call number without taking operational troubles such as database setting on the network side. It is an object of the present invention to provide a technique capable of determining whether or not.

According to the disclosed technology, it is a communication system including a movement management device and a call control device.
The movement management device includes a transmitter that transmits an emergency number list to another device based on an attach request from the user device.
The call control device is
A setting unit that holds the emergency number list acquired from the other device, and
A receiver that receives a connection request including a number from the user device,
A communication system including a control unit for determining whether or not the number is an emergency number by referring to the emergency number list is provided.

According to the disclosed technology, it is possible for the network side to determine whether or not the destination number of the call sent from the UE is an emergency call number without the need for operational troubles such as database setting. Technology is provided.

It is a block diagram of the system in Embodiment of this invention. It is a figure which shows the example of the distribution Calfllow of ENL at the time of normal location registration. It is a figure which shows the format of the Emergency Number List. It is a figure which shows the format of the Extended Emergency Number List. It is a figure which shows the example of making a normal UE Underfected emergency call. It is a figure which shows the outline of the processing sequence in this embodiment. It is a figure which shows the processing sequence of Example 1. FIG. It is a figure which shows the processing sequence of Example 2. It is a functional block diagram of MME200. It is a functional block diagram of HSS300. It is a functional block diagram of PGW400. It is a functional block diagram of S-CSCF610. It is a functional block diagram of MMTelAS640. It is a figure which shows the hardware configuration example of the apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

In the embodiment of the present invention, an example of applying the present invention to the LTE core network is mainly shown, but the present invention is also applicable to the 5G core network.

Further, in this specification, the signal name, the interface name, the device name, etc. used in the existing specifications are used, but these may be referred to by different names.

(System configuration)
FIG. 1 is a diagram for explaining a communication system according to an embodiment of the present invention. As shown in FIG. 1, the communication system according to the embodiment of the present invention includes a UE (User Equipment) 100, an eNB (eNodeB) 800, an SGW (Serving Gateway) 700, an HSS (Home Subscriber Server) 300, and a PGW (Packet). It has a Data Network Gateway) 400, a PCRF (Policy and Charging Rules Function) 500, and an IMS-related device 600.

In the example of FIG. 1, as the IMS (IP Multimedia Subsystem) related device 600, S-CSCF (Serving Call State Control Function) 610, P-CSCF (Proxy Call State Control Function) 620, Local DB630, MMTelAS (Multimedia Telephony Application Server) ) 640 is shown.

A system having any one or more of all the devices shown in FIG. 1 may be referred to as a "communication system".

The UE 100 may be referred to as a user device, a mobile device, a terminal, or the like, and is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). .. The eNB (eNodeB) 800 is a base station device. The SGW 700 is a territorial packet gateway that houses a 3GPP access system. The HSS 300 is a subscriber information management device in a 3GPP mobile communication network. The PGW 400 is a connection point with the PDN, and is a gateway that assigns an IP address, transfers packets to the SGW, and the like. The PGW 400 may be referred to as a gateway device. The PCRF500 is a device that controls QoS for user data transfer and billing.

IMS is a call control communication method that realizes multimedia services by integrating communication services such as fixed / mobile communication networks with IP technology, SIP technology, and the like. The CSCF is a device that controls VoIP sessions. In particular, the S-CSCF610 has an interface with the HSS as a SIP registration server. The P-CSCF620 is a SIP relay server arranged at a connection point with the EPC. The Local DB 630 is a database device that stores data. The MMTelAS640 is a device that provides various additional services similar to circuit switching. S-CSCF610, P-CSCF620, and MMTelAS640 are all examples of call control devices.

During roaming, the eNB 800, SGW 700, and MME 200 form a local network (for example, a foreign network), and the HSS300, PCRF500, PGW400, and IMS-related device 600 form a home network (for example, a Japanese network). The service area network and the home network are connected by a relay network.

Hereinafter, in the communication system shown in FIG. 1, the operation related to the problem of the present invention will be described as a basic operation example.

(Basic operation example)
As described above, when making an emergency call, the UE 100 makes an emergency call with an emergency call type of "Emergency Service Category" instead of the dialed number (Non-Patent Document 1). The types of emergency calls include, for example, police, fire fighting, emergency, maritime, mountain rescue, and IoT equipment (automatic transmission of machines). The connection destination emergency agency is specified by the emergency call type, and the UE 100 is connected to the connection destination emergency agency.

The UE 100 can recognize a global emergency call number (which may be called an emergency number) such as 911 or 112 as an emergency call number based on the information written in the SIM in advance (Non-Patent Document 1). However, depending on the country or region, numbers other than the preset numbers may be used as emergency call numbers. Especially when roaming, there are many cases where the emergency call number of the service area is not written on the SIM.

<ENL>
Therefore, it is stipulated that ENL (Emergency Number List) can be notified to the UE 100 from the service network at the time of location registration. By using ENL, it is possible to map an arbitrary number to the Emergency Service Category as a number for police, firefighting, emergency, maritime, mountain rescue, etc. (Non-Patent Document 2).

FIG. 2 shows a sequence when the above ENL is notified to the UE 100 at the time of location registration. In S1, the UE 100 transmits an Attach (attach request) to the MME 200. In S2, the MME 200 transmits ULR (Update-Location-Request) (which may be referred to as a location registration request) to the HSS 300, and in S3, the HSS 300 transmits ULA (Update-Location-Answer) to the MME 200. In S4, the MME 200 transmits a Create Session Request (which may be referred to as a session establishment request) to the PGW 400, and in S5, the PGW 400 transmits a Create Session Request to the MME 200.

According to S1 to S5, the PDN connection for the packet is established in S6, and in S7, the MME 200 transmits the Touch Access with the ENL added to the UE 100. As a result, the UE 100 can acquire the ENL, and then, when the emergency call number is input, the UE 100 can recognize the number as the emergency call number and make an emergency call.

FIG. 3 is an excerpt from Non-Patent Document 2 and shows the format of ENL. The emergency service category is described in the Emergency Service Category Value column, and the number associated with the emergency call type is described in the column below it.

<EENL>
At ENL, only emergency call types could be mapped to numbers for limited purposes such as police, firefighting, emergency, maritime, and mountain rescue. Therefore, EENL (Exted ENL) was added in 3GPP Rel_15, and it became possible to map each region's individual type that cannot be expressed by ENL with a number (Non-Patent Document 3). FIG. 4 is an excerpt from Non-Patent Document 3 and shows the format of EENL. The Callflow for notification of EENL is the same as the Callflow in the case of ENL shown in FIG. However, EENL has the following restrictions.

That is, EENL can be applied only to making an emergency call with IMS, and when making a call with CS domain, it is not possible to make a call by designating the emergency call type. Also, while ENL can be processed by all UEs, EENL is a new function from 3GPP Rel_15, so previous UEs that do not support Rel_15 cannot process this and ignore it.

<Judgment by IMS of UE undetected emergency call>
The UE 100 recognizes the emergency call number dialed by the user as an emergency call number by three types of methods: a hard code to the UE 100, a SIM holding, and an ENL / EENL notification. However, even though it is actually an emergency call number, the UE 100 may not recognize it as an emergency call number and may transmit it as a normal number. Therefore, there is a mechanism on the NW side that determines that the call for which the number is specified is an emergency call and prompts the UE 100 to retransmit as an emergency call.

In this mechanism, in order to use an emergency call bearer different from the normal communication bearer, the IMS instructs the UE 100 to start over from the bearer establishment. The instruction is given by P-CSCF620 in IMS, and when the list of emergency call numbers held in Local DB630 and the destination of the user match, the instruction (380 Alternative Service) to be redone is given by IMS (SIP) (non-patent). Patent Document 4).

An example of Callflow in this mechanism is shown in FIG. In FIG. 5, after S1 to S6 described with reference to FIG. 2, the MME 200 transmits an Atatch Access with ENL / EENL added to the UE 100. In addition, "ENL / EENL" means only ENL, only EENL, or ENL and EENL.

In S8 to S13, the registration process for the IMS-related device of the UE 100 is executed. That is, in S8, the UE 100 transmits the IMS Restriction Request to the P-CSCF 620, and the P-CSCF 620 transmits the Request to the S-CSCF 610. After passing through S9 to 12, in S13, 200 OK (IMS Region) is returned to the UE 100.

In S14, the emergency call number is dialed and the outgoing call is made in the UE 100, but the UE 100 makes a normal outgoing call without recognizing that the number is the emergency call number, and INVITE with the specified number is transmitted. ..

A list of emergency call numbers is stored in the Local DB 630. In S15, the P-CSCF 620 refers to the Local DB 630 to check whether the number included in the INVITE received from the UE 100 is included in the list of emergency call numbers, so that the number is an emergency call number. Determine if there is. Here, it is assumed that the number received from the UE 100 is included in the list of emergency call numbers, and the P-CSCF 620 determines that the INVITE is actually a call related to the emergency call, and in S16, the P-CSCF 620 By transmitting the 380 Alternative Response to the UE 100, the UE 100 is instructed to make a transmission in the emergency call dedicated NW. Upon receiving the instruction, the UE 100 executes a call transmission as an emergency call in S17.

An example of a method for determining an emergency call number in the above P-CSCF620 is described in "K.4 Non UE Detectable Email Session" of Non-Patent Document 5.

In the above method, it is necessary to keep a list of all emergency call numbers in the Local DB 630 of IMS. In addition, the P-CSCF 620 needs to be able to determine a country in the region and obtain a list of emergency call numbers in that country by referring to the Local DB 630 so that it can support overseas roaming.

(About issues in the embodiment)
As described above, in the method described in the basic operation example, the User Experience related to the transmission of the emergency call may decrease depending on the UE used. That is, in the flow shown in FIG. 2 and the like, even if the MME 200 notifies the UE 100 of the EENL, the UE that cannot interpret the EENL makes a call of the number included in the EENL (the user recognizes the emergency call call). , Normal voice transmission. In that case, even if the emergency call can be made by the mechanism described with reference to FIG. 5, a delay or the like occurs and the User Experience is lowered as compared with the UE that can interpret EENL. Further, even if the mechanism described with reference to FIG. 5 is used, it is assumed that an emergency call cannot be made, and in that case, the User Experience is further lowered.

Further, as described above, in order to realize the mechanism described in FIG. 5, it is necessary to set an emergency call number in the Local DB of IMS (P-CSCF). Especially in order to make an emergency call in overseas roaming, the local emergency call number used in the local network needs to be set accurately in the Local DB, but for that purpose, the emergency call number of the country is set to the local. It is necessary to contact the business operator individually to understand. Furthermore, if there is a change in the number, there is a risk of omission of settings because the response to the change depends on the communication between the persons in charge. Further, since the content notified by NAS from the local network (VPLMN) cannot be grasped by the IMS of the home network, it cannot be determined that the contradiction has occurred even if the settings are inconsistent.

Hereinafter, techniques for solving the above-mentioned problems will be described as embodiments of the present invention.

(Outline of Embodiment)
The system configuration in this embodiment is as shown in FIG. Further, the MME 200 holds ENL / EENL as in the example described with reference to FIG.

In the present embodiment, a mechanism for notifying the device (referred to here as a call control device) on the IMS side of ENL / EENL held by the MME 200 is introduced.

The technique according to this embodiment can also be applied to a 5G core network, in which case the device holding the ENL / EENL is, for example, an AMF (Access and Mobility Management Function). MME and AMF are collectively called mobility management devices. The mobility management device may be called a mobility management device.

FIG. 6 shows an example of a processing sequence in a communication system including a UE 100, a mobility management device 900 holding ENL / EENL, and a call control device 950.

In S100, the UE 100 transmits an attach request (which may be called a registration request) to the mobility management device 900. The attach request is transmitted when the power of the UE 100 is turned on or the like.

In S101, the ENL / EENL transmitted from the mobility management device 900 is notified to the call control device 950 via, for example, another device. The ENL / EENL may be transmitted directly from the mobility management device 900 to the call control device 950. Further, the sequence in S101 is, for example, an existing sequence between the mobility management device 900 and the call control device 950. In this case, ENL / EENL is added to the signals transmitted and received in the existing sequence. The sequence in S101 may be a new sequence. The new sequence notifies ENL / EENL.

The other device described above is, for example, HSS300 or PGW400. In the case of 5G, the above-mentioned other device is, for example, UDM (Unified Data Management) or UPF (User Plane Function).

The call control device 950 that has received ENL / EENL in S101 stores ENL / EENL in a storage means such as a memory.

In S102, the UE 100 transmits a connection request including a number specified by the user as a destination to the call control device 950. In S103, the call control device 950 checks whether or not the number is included in ENL / EENL, and if the number is included in ENL / EENL, the number is an emergency call number in the service area network. Judge that.

When it is determined that the number is an emergency call number in the service area network, the call control device 950 transmits an emergency call transmission instruction to the UE 100 in S104. In S105, the UE 100 makes an emergency call according to the instruction.

(Detailed operation example)
Detailed operation examples 1 and 2 in the present embodiment will be described with reference to FIGS. 7 and 8. Detailed operation example 1 is an example of notifying the IMS related device of ENL / EENL by using the flow of the signal related to the position registration (MM: Mobility Management). Detailed operation example 2 is an example of notifying the IMS-related device of ENL / EENL by using the flow of signals related to session establishment (SM: Session Management).

<Detailed operation example 1>
First, a detailed operation example 1 will be described with reference to FIG. 7. After the attack of S1, in S2, the MME 200 transmits a signal (which may be called a message) in which ENL / EENL is added to the ULR to the HSS 300. The HSS 300 stores ENL / EENL in a storage means such as a memory as information about the UE 100 (user).

Through S3 to S7, in S8, S-CSCF610 uses the Cx interface of DIAMETER to request user information (user information about UE 100) from HSS 300. In S9, the HSS 300 reads the ENL / EENL from the storage means and transmits a signal in which the ENL / EENL is added to the Response to the S-CSCF610. The S-CSCF610 stores ENL / EENL in a storage means such as a memory as information about the UE 100 (user).

In S10, the S-CSCF610 uses the ISC interface to send a Request to the MMTeluAS630.

In S11, the MMTelar AS630 requests the HSS 300 for user information (user information about the UE 100) using the DIAMETER Sh interface. In S12, the HSS 300 reads the ENL / EENL from the storage means, and transmits a signal in which the ENL / EENL is added to the Response to the MM TelAS630. The MMTelAS630 stores ENL / EENL in a storage means such as a memory as information about the UE 100 (user).

After S13 to S16, the emergency call number is dialed and the outgoing call is made in the UE 100, but the UE 100 makes a normal outgoing call without recognizing that the number is the emergency call number, and INVITE including the number transmits. Will be done. The INVITE may directly include the number, or may include information corresponding to the number (identifier for identifying the destination, etc.) without including the number. Even if INVITE does not include a number and contains information corresponding to the number, by replacing the number described in ENL / EENL with information, the information contained in INVITE and the number described in ENL / EENL Can be collated with. This point is the same in the detailed operation example 2.

In S17 to S18, the S-CSCF 610 receives the INVITE, refers to the storage means, and checks whether the number included in the INVITE received from the UE 100 is included in the ENL / EENL, so that the number is urgent. Determine if it is a call number. When the number included in INVITE is included in ENL / EENL, the S-CSCF610 instructs the UE 100 to make an emergency call-only NW by transmitting a 380 Alternative Response to the UE 100 in S21 and S22. .. Upon receiving the instruction, the UE 100 executes the transmission of the call as an emergency call.

If it is determined in S-CSCF610 that the number included in INVITE is not included in ENL / EENL, INVITE is transferred to MMTelAS640 in S19. The MMTelAS640 receives the INVITE and refers to the storage means to check whether the number included in the INVITE received from the UE 100 is included in the ENL / EENL, thereby checking whether the number is an emergency call number. Judge whether or not. When the number included in INVITE is included in ENL / EENL, MMTelAS640 instructs the UE 100 to make an emergency call-only NW by transmitting a 380 Alternative Response to the UE 100 in S18 to S20. Upon receiving the instruction, the UE 100 executes the transmission of the call as an emergency call.

In the example shown in FIG. 7, both ENL / EENL acquisition (method 1) via Cx and ENL / EENL acquisition (method 2) via Sh are executed, but only one of them is executed. You may do it.

<Detailed operation example 2>
Next, a detailed operation example 2 will be described with reference to FIG. After S1 to S3, in S4, the MME 200 transmits a signal (which may be called a message) in which ENL / EENL is added to the Create Session Request (session establishment request) is transmitted to the PGW 400. The PGW 400 stores ENL / EENL in a storage means such as a memory as information about the UE 100 (user).

After S5 to S12, in S13, the MMTelAS640 uses the Rx interface to send the query to the PCRF500, and in S14, the PCRF500 uses the Gx interface to send the query to the PGW400.

In S15, the PGW 400 reads the ENL / EENL from the storage means and transmits a signal in which the ENL / EENL is added to the response to the PCRF500. In S16, the PCRF500 transmits a signal in which ENL / EENL is added to the Response to the MMTelAS640. The MMTelAS640 stores ENL / EENL in a storage means such as a memory as information about the UE 100 (user).

Next, the emergency call number is dialed and the outgoing call is made in the UE 100, but the UE 100 makes a normal outgoing call without recognizing that the number is the emergency call number, and INVITE including the number is transmitted.

In S19, the MMTelAS640 receives the INVITE, refers to the storage means, and checks whether the number included in the INVITE received from the UE 100 is included in the ENL / EENL, so that the number is an emergency call number. Determine if. When the number included in INVITE is included in ENL / EENL, MMTelAS640 instructs the UE 100 to make an emergency call-only NW by transmitting a 380 Alternative Response to the UE 100 in S20 to S22. Upon receiving the instruction, the UE 100 executes the transmission of the call as an emergency call.

In each of the detailed operation examples 1 and 2, the existing signals (Cx, Sh, Gx + Rx) are extended to embed ENL / EENL in the signal so that ENL / EENL can be notified. However, this is an example, and the ENL / EENL may be notified by using a new signal instead of using the existing signal.

(About the effect of the embodiment)
With the above method, even if an emergency call number that cannot be recognized by the UE as an emergency call number is dialed and a normal call is made, the IMS side (net side) can reliably determine and recognize that the call is an emergency call. .. As a result, the UE can make an emergency call regardless of whether the EENL can be recognized or not, regardless of the UE, the User Experience is unified, and the problem due to the Local DB setting operation can be solved.

(Device configuration)
Next, a functional configuration example of the MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 that execute the processes and operations described so far will be described. The configuration of the MME 200, the configuration of the HSS 300, and the configuration of the PGW 400 may be considered to be the configuration of the AMF, the configuration of the UDM, and the configuration of the UPF, respectively.

FIG. 9 is a diagram showing an example of the functional configuration of the MME 200. As shown in FIG. 9, the MME 200 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 9 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 210 generates a signal to be transmitted to the core network side (a signal to which ENL / EENL is added, etc.) and transmits the signal. The receiving unit 220 receives various signals transmitted from the UE 100 and also receives various signals from the core network side.

The setting unit 230 stores various setting information in the storage device included in the setting unit 230, and reads the various setting information from the storage device as needed. The content of the setting information is, for example, ENL / EENL. The control unit 240 controls the processing.

FIG. 10 is a diagram showing an example of the functional configuration of the HSS 300. As shown in FIG. 10, the HSS 300 has a transmission unit 310, a reception unit 320, a setting unit 330, and a control unit 340. The functional configuration shown in FIG. 10 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 310 generates a signal to be transmitted to the IMS side (a signal to which ENL / EENL is added, etc.) and the like, transmits the signal, generates a signal to be transmitted to the MME 200 side, and transmits the signal. The receiving unit 320 receives various signals transmitted from the MME 200 and also receives various signals from the IMS side.

The setting unit 330 stores various setting information in the storage device included in the setting unit 330, and reads the various setting information from the storage device as needed. The content of the setting information is, for example, subscriber information. The control unit 340 controls the processing.

FIG. 11 is a diagram showing an example of the functional configuration of the PGW 400. As shown in FIG. 11, the PGW 400 has a transmitting unit 410, a receiving unit 420, a setting unit 430, and a control unit 440. The functional configuration shown in FIG. 11 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 410 generates a signal or the like to be transmitted to the MME 200 side, transmits the signal, generates a signal to be transmitted to the IMS side (a signal to which ENL / EENL is added, or the like), and transmits the signal. The receiving unit 420 receives various signals transmitted from the MME 200 side and also receives various signals from the IMS side. The setting unit 430 stores various setting information in the storage device included in the setting unit 430, and reads the various setting information from the storage device as needed. The control unit 440 controls the processing.

FIG. 12 is a diagram showing an example of the functional configuration of the S-CSCF610. As shown in FIG. 12, the S-CSCF 610 has a transmitting unit 611, a receiving unit 612, a setting unit 613, and a control unit 614. The functional configuration shown in FIG. 12 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 611 generates, for example, a signal for an emergency call transmission instruction, and transmits the signal to the UE 100 side. The receiving unit 612 receives various signals (signals with ENL / EENL added, etc.) transmitted from the HSS 300 side, and also receives INVITE from the UE 100 side. The setting unit 613 stores various setting information in the storage device included in the setting unit 613, and reads the various setting information from the storage device as needed. Further, the storage device of the setting unit 613 stores the ENL / EENL received from the HSS 300. The control unit 614 determines, for example, whether ENL / EENL includes a number included in INVITE.

FIG. 13 is a diagram showing an example of the functional configuration of the MMTelAS640. As shown in FIG. 13, the MMTelAS640 has a transmission unit 641, a reception unit 642, a setting unit 643, and a control unit 644. The functional configuration shown in FIG. 13 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 641 generates, for example, a signal for an emergency call transmission instruction, and transmits the signal to the UE 100 side. The receiving unit 642 receives various signals (signals to which ENL / EENL are added, etc.) transmitted from the HSS 300 side or the PGW 400, and also receives INVITE from the UE 100 side. The setting unit 643 stores various setting information in the storage device included in the setting unit 643, and reads the various setting information from the storage device as needed. Further, the storage device of the setting unit 643 stores ENL / EENL received from the HSS 300 or the PGW 400. The control unit 644 determines, for example, whether ENL / EENL includes a number included in INVITE.

(Hardware configuration)
The block diagrams (FIGS. 9 to 13) used in the description of the above embodiment show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by using two or more physically or logically separated devices). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't. For example, a functional block (constituent unit) that functions transmission is called a transmitting unit or a transmitter. As described above, the method of realizing each of them is not particularly limited.

For example, the MME200, HSS300, PGW400, S-CSCF610, MMTelAS640, etc. in one embodiment of the present disclosure may function as a computer that processes the communication method of the present disclosure. FIG. 14 is a diagram showing an example of the hardware configuration of MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 according to the embodiment of the present disclosure. The above-mentioned MME200, HSS300, PGW400, S-CSCF610, MMTelAS640 physically include a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like, respectively. It may be configured as a computer device. The computer device may be a virtual machine. When the computer device is a virtual machine, the "hardware" is virtual hardware.

In the following description, the word "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices. Good.

Each function in the MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 is performed by the processor 1001 by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and the communication device 1004. It is realized by controlling the communication by the device and controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, the control unit of each of the above-mentioned devices may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit of each device may be stored in the storage device 1002 and realized by a control program that operates in the processor 1001. Although it has been explained that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). It may consist of at least one of a-ray® disk), a smart card, a flash memory (eg, a card, stick, key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The auxiliary storage device 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

In addition, MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 are microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gates, respectively). It may be configured to include hardware such as Array), and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Summary of embodiments)
As described above, this specification discloses at least the communication system, the call control device, and the communication method described in the following items.
(Section 1)
Movement management device and
A communication system including a call control device.
The movement management device includes a transmitter that transmits an emergency number list to another device based on an attach request from the user device.
The call control device is
A setting unit that holds the emergency number list acquired from the other device, and
A receiver that receives a connection request including a number from the user device,
A communication system including a control unit that determines whether or not the number is an emergency number by referring to the emergency number list.
(Section 2)
The call control device is
The communication system according to paragraph 1, further comprising a transmission unit that transmits an emergency call transmission instruction to the user device when the number is determined to be an emergency number.
(Section 3)
The communication system according to item 1 or 2, wherein the other device is a subscriber information management device or a gateway device.
(Section 4)
The transmission unit of the movement management device transmits the emergency number list to the other device together with a location registration request, or transmits the emergency number list to the other device together with a session establishment request. The communication system according to any one of the three items.
(Section 5)
A setting unit that holds the emergency number list sent from the movement management device based on the attach request from the user device,
A receiver that receives a connection request including a number from the user device,
A call control device including a control unit that determines whether or not the number is an emergency number by referring to the emergency number list.
(Section 6)
A step in which the movement management device sends an emergency number list to another device based on an attach request from the user device.
A step in which the call control device holds the emergency number list acquired from the other device in the setting unit, and
A step in which the call control device receives a connection request including a number from the user device, and
A communication method in which the call control device includes a step of determining whether or not the number is an emergency number by referring to the emergency number list.

With the configuration of the first paragraph, it is possible for the network side to determine whether or not the destination number of the call sent from the UE is an emergency number without the trouble of operating the database setting or the like. Technology is provided. According to the configuration of the second paragraph, an emergency call outgoing instruction can be appropriately transmitted to the UE. According to the configuration of the third item, the present invention can be easily applied to the LTE or 5G core network. According to the configuration of the fourth item, the present invention can be easily applied to the LTE or 5G core network.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in combination with another item. It may be applied (as long as there is no contradiction) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. With respect to the processing procedure described in the embodiment, the order of processing may be changed as long as there is no contradiction. For convenience of processing description, MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 have been described using functional block diagrams, respectively, but such devices are implemented in hardware, software, or a combination thereof. May be good. According to the embodiment of the present invention, the software operated by the processors of the MME200, HSS300, PGW400, S-CSCF610, and MMTelAS640 are random access memory (RAM), flash memory, read-only memory (ROM), EPROM, and EEPROM, respectively. , Registers, hard disks (HDDs), removable disks, CD-ROMs, databases, servers and any other suitable storage medium.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. RRC signaling may also be called an RRC message, for example, RRC. It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize and extend based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

The information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information and the like may be stored in a specific location (for example, memory), or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example). , Comparison with a predetermined value).

Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted to mean.

Further, software, instructions, information and the like may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in the present disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

Further, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (eg, PUSCH, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are limited in any way. It's not a name.

In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of a base station and a mobile station may be referred to as a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an IoT (Internet of Things) device such as a sensor.

The terms "determining" and "determining" as used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment, calculation, computing, processing, deriving, investigating, looking up, search, inquiry. It may include (eg, searching in a table, database or another data structure), ascertaining as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that "resolving", "selecting", "choosing", "establishing", "comparing", etc. are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include that some action is regarded as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first", "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.

The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device" and the like.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include the nouns following these articles being plural.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any restrictive meaning to the present disclosure.

100 UE
800 eNB
700 SGW
300 HSS
400 PGW
500 PCRF
600 IMS related equipment 610 S-CSCF
620 P-CSCF
630 Local DB
640 MMTelAS
210, 310, 410, 611, 641 Transmitter 220, 320, 420, 612, 642 Receiver 230, 330, 430, 613, 643 Setting unit 240, 340, 440, 614, 644 Control 1001 Processor 1002 Storage 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (6)

Movement management device and
A communication system including a call control device.
The movement management device includes a transmitter that transmits an emergency number list to another device based on an attach request from the user device.
The call control device is
A setting unit that holds the emergency number list acquired from the other device, and
A receiver that receives a connection request including a number from the user device,
A communication system including a control unit that determines whether or not the number is an emergency number by referring to the emergency number list. The call control device is
The communication system according to claim 1, further comprising a transmission unit that transmits an emergency call transmission instruction to the user device when the number is determined to be an emergency number. The communication system according to claim 1 or 2, wherein the other device is a subscriber information management device or a gateway device. Claims 1 to 3 that the transmission unit of the movement management device transmits the emergency number list to the other device together with a location registration request, or transmits the emergency number list to the other device together with a session establishment request. The communication system according to any one of the above. A setting unit that holds the emergency number list sent from the movement management device based on the attach request from the user device,
A receiver that receives a connection request including a number from the user device,
A call control device including a control unit that determines whether or not the number is an emergency number by referring to the emergency number list. A step in which the movement management device sends an emergency number list to another device based on an attach request from the user device.
A step in which the call control device holds the emergency number list acquired from the other device in the setting unit, and
A step in which the call control device receives a connection request including a number from the user device, and
A communication method in which the call control device includes a step of determining whether or not the number is an emergency number by referring to the emergency number list.

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