JP7049966B2 - Communication control device - Google Patents

Description

The present invention relates to a communication control device that controls communication of a roaming user terminal.

The following Non-Patent Document 1 defines an IMS emergency call method as an emergency call processing method at the time of roaming in VoLTE communication. In this IMS emergency call system, it is stipulated that the P-CSCF, which is close to the emergency agency in the area network, is used for control. The emergency call is a connection call for connecting to an emergency response organization, and the emergency response organization includes a police organization and the like.

3GPP TS23.167

The IMS emergency call method described in Non-Patent Document 1 includes a P-CSCF (Proxy-Call Session Control Function), which is a communication connection device in a service area network in which a user terminal is located, and a home network of the user terminal. HSS (Home Subscriber Server) in the above is a method that does not connect to communication. Therefore, the emergency call processing method provided on the local network may differ from the emergency call processing method provided on the home network of the user terminal, and there may be a difference in the quality of service provided. In addition, since the network P-CSCF and the user terminal are newly connected, a connection test is required between the network P-CSCF and the user terminal in order to guarantee an emergency call connection. ..

Therefore, in order to solve the above-mentioned problems, it is an object of the present invention to provide a communication control device capable of reliably communicating and connecting a predetermined type of call signal such as an emergency call.

In order to solve the above-mentioned problems, the communication control device of the present invention is a communication control device that controls communication of a user terminal having a network of another communication carrier as a home network, and is a call signal of a predetermined type from the user terminal. And a determination unit that determines whether or not a call processing device for processing the predetermined type of call signal provided by the other communication carrier is set when the predetermined type of call signal is received. If it is determined that the call processing device is set, the acquisition unit for acquiring the address information of the call processing device from the communication management device of the other communication carrier and the address information acquired by the acquisition unit. The user terminal is provided with a notification unit, and the predetermined type of call signal is an emergency call for communicating with an emergency organization.

With this configuration, it is possible to acquire the address information of the call processing device of the home network and notify the user terminal. The user terminal can use the address information to perform communication connection processing of a predetermined type of call signal on the home network. Therefore, it enables a reliable communication connection of a predetermined type of call signal.

According to the present invention, it is possible to reliably make a communication connection to a predetermined type of call signal such as an emergency call.

It is a figure which shows the system structure of the communication system including MME100 which is the communication control apparatus which concerns on one Embodiment of this disclosure. It is a block diagram which shows the functional structure of MME100. It is a flowchart which shows the operation of MME100. It is a processing sequence by the communication system of the local network and the communication system of the home network. It is a figure which shows an example of the hardware composition of MME100 which concerns on one Embodiment of this disclosure.

An embodiment of the present invention will be described with reference to the accompanying drawings. When possible, the same parts are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a diagram showing a system configuration of a communication system including the MME 100 which is a communication control device according to an embodiment of the present disclosure. As shown in the figure, the network configured by the communication system of the carrier A includes MME100, PGW200, and P-CSCF300. The network configured by the communication system of the carrier B includes HSS100a, PGW200a, and P-CSCF300a.

The user terminal 50 is a terminal whose home network is a network composed of the communication system of the communication carrier B. Generally, the user terminal 50 is a mobile phone that uses the network of the communication carrier B by contract.

In one embodiment of the present disclosure, it is considered that the user terminal 50 whose home network is the network of the communication carrier B roams in and moves to the network of the communication carrier A. When the user terminal 50 in the network of the carrier A makes an emergency call connection request, the address of the P-CSCF300a for performing the emergency call processing from the PGW200a of the network of the carrier B via the MME 100. Get information.

Then, the user terminal 50 makes an emergency call to the P-CSCF 300a using the acquired address information, and the P-CSCF 300a executes the emergency call processing. Therefore, the user terminal 50 can make the P-CSCF300a of the home network process an emergency call.

Next, the functional configuration of the MME 100 of the present embodiment will be described. FIG. 2 is a block diagram showing a functional configuration of the MME 100. As shown in the figure, the MME 100 includes a receiving unit 101, a determination unit 102, an acquisition unit 103, and a notification unit 104.

The receiving unit 101 is a portion that receives a connection request (PDN Connectivity Request (Emergency) / Emergency Attach) indicating an emergency call or a normal call from the user terminal 50 from the user terminal 50.

The determination unit 102 is a unit that determines whether or not the connection request received by the reception unit 101 is an emergency call request. Further, the determination unit 102 determines whether or not the user terminal has a local network as a home network based on the terminal information or the subscriber information (for example, IMSI (International Mobile Subscriber Identity)) included in the connection request. In addition, it is determined whether or not the user terminal (so-called overseas roaming-in user terminal) has the network of an overseas telecommunications carrier as the home network. The MME 100 can determine which carrier's network is the home network of the user terminal requesting the connection based on the subscriber information such as HSS on the carrier A side (not shown) and the received IMSI.

Further, the determination unit 102 determines the emergency call provision type of the P-CSCF 300a on the home network of the user terminal 50 (the network of the communication carrier B). That is, it is determined whether or not the P-CSCF 300a for processing the emergency call is provided in the home network of the user terminal 50. In addition, whether or not the MME100 is provided with P-CSCF for performing emergency call processing in the network of each telecommunications carrier for emergency call processing for each telecommunications carrier that has a roaming contract in advance. I remember the information of. The determination unit 102 determines the emergency call provision type of the P-CSCF 300a on the home network of the user terminal 50 based on the information.

The acquisition unit 103 is a unit for acquiring the address information of the P-CSCF 300 or 300a. That is, the acquisition unit 103 selects the PGW 200 or 200a according to the home network of the user terminal 50 that has sent the connection request, and acquires the address information of the P-CSCF 300 or 300a from the PGW 200 or 200a.

When the user terminal 50 is an overseas roaming in-user terminal, the acquisition unit 103 selects the PGW 200 of the network in the area and acquires the address information of the P-CSCF 300 in order to adopt the IMS emergency call method.

The notification unit 104 is a part that transmits the address information of the P-CSCF 300 or P-CSCF 300a acquired by the acquisition unit 103 to the user terminal 50. The user terminal 50 performs connection processing to P-CSCF300 or P-CSCF300a using the address information.

The operation of the MME 100 configured in this way will be described. FIG. 3 is a flowchart showing the operation of the MME 100. When the receiving unit 101 receives the connection request from the user terminal 50 in the MME 100 (S100), the determination unit 102 determines whether or not the connection request is an emergency call transmission (S101). When the determination unit 102 determines that the call is not an emergency call (S101: NO), the call control is performed as a general call (S102). That is, the MME 100 performs address resolution processing of P-CSCF for general calls using PGW or the like. In one embodiment of the present disclosure, the general call refers to a call that is not an emergency call.

When the determination unit 102 determines that the connection request from the user terminal 50 is an emergency call (S101: YES), the user terminal 50 that has sent the emergency call is a user terminal whose home network is the area network. It is determined whether or not there is (S103). The determination unit 102 determines whether or not the user terminal 50 is a user terminal in the service area network based on the IMSI included in the connection request for the emergency call.

When the determination unit 102 determines that the user terminal 50 is a user terminal whose home network is the area network (S103: YES), the acquisition unit 103 selects the PGW 200 of the area network (S104). Then, the acquisition unit 103 acquires the address information of the P-CSF for emergency call in the area network from the PGW 200, and the notification unit 104 sends the address information to the user terminal 50 to issue the address information. Do (S105).

On the other hand, if the determination unit 102 determines that the user terminal 50 is not a user terminal whose home network is the area network (S103: NO), it further determines whether or not the user terminal is an overseas roaming-in user terminal (S106). .. Based on the IMSI included in the emergency call, it is determined whether or not the user terminal is an overseas roaming-in user terminal.

Here, when the determination unit 102 determines that the user terminal 50 is an overseas roaming-in user terminal (S106: YES), the acquisition unit 103 selects the PGW 200 of the local network (S107). The acquisition unit 103 acquires the address information of the P-CSCF 300 for emergency calls in the area network from the PGW 200, and the notification unit 104 sends the address information to the user terminal 50 to issue the address information ( S108).

When the determination unit 102 determines that the user terminal 50 is not an overseas roaming-in user terminal (S106: NO), the determination unit 102 determines whether or not the user terminal 50 has a P-CSCF connection type for emergency calls on the home network (S109). ). Here, if it is determined that the P-CSCF connection type is not set, that is, the P-CSCF for emergency call is not set in the home network (S109: none), the process proceeds to S107, and the acquisition unit 103 determines. PGW200 in the area network is selected, and the address information of P-CSCF300 for emergency call in the area network is acquired.

On the other hand, when the determination unit 102 determines that the P-CSCF connection type for emergency call on the home network of the user terminal 50 is set (S109: Yes), the acquisition unit 103 determines that the home network of the user terminal 50 has a P-CSCF connection type. PGW200a is selected (S110). Then, the acquisition unit 103 acquires the address information of the P-CSCF 300a of the home network, and the notification unit 104 sends the acquired address information to the user terminal 50 to pay out the address information (S111). As a result, the MME 100 can acquire appropriate P-CSCF address information based on which network the user terminal 50 uses as the home network, whether it is an overseas roaming in-user terminal, or the like.

Next, the processing sequence by the communication system of the local network and the communication system of the home network will be described with reference to FIG.

The user terminal 50 transmits a PDN Connectivity Request (Emergency) / Emergency Attach, which is an emergency call connection request, to the MME 100 (S201). In the MME 100, the determination unit 102 determines whether the connection request of the roaming-in user terminal 50 is an emergency call according to the above process (S202). Here, the determination unit 102 determines that the call is an emergency call from the roaming-in user terminal 50 of a domestic telecommunications carrier, and the acquisition unit 103 determines that the emergency call is from the PGW 200a in the home network of the user terminal 50. -Acquire the address information of CSCF300a (S203, S204). At this time, the PGW 200a also determines the emergency call.

In the MME 100, the acquisition unit 103 acquires the address information of the P-CSCF 300a of the home network, and the notification unit 104 transmits it to the user terminal 50 (S205).

The user terminal 50 transmits an Emergency Reg to the P-CSCF300a of the home network using the transmitted address information of the P-CSCF300a (S206), and performs an Emergency Registration process for user authentication processing and the like (S207). .. Then, the user terminal 50 transmits the SIP INVITE signal to the emergency service via the P-CSCF300a (S208, 209).

Next, the operation and effect of the MME 100, which is the communication control device according to the embodiment of the present disclosure, will be described. The MME 100 of the embodiment of the present disclosure is a communication control device that controls communication of a user terminal including a user terminal 50 having a network of another communication carrier (for example, a communication carrier B) as a home network.

The MME 100 has a receiving unit 101 that receives a predetermined type of call signal (emergency call) from the user terminal 50, and another communication carrier (communication carrier B) receives a predetermined type of call signal (emergency call). There is a determination unit 102 for determining whether or not a call processing device (P-CSCF300a) for processing a predetermined type of call signal (emergency call) to be provided is set, and a setting for this call processing device (P-CSCF300a). If it is determined that, the acquisition unit 103 and the acquisition unit 103 that acquire the address information of the call processing device (P-CSCF300a) from the communication management device (PGW200a) of another communication carrier (communication carrier B). The user terminal 50 is provided with a notification unit 104 that notifies the user terminal 50 of the address information acquired by the user terminal 50.

With this configuration, when a predetermined type of call signal such as an emergency call is received from the user terminal 50, a call processing device for processing the predetermined type of call signal from the communication carrier B which is the home network of the user terminal 50 ( The address information of P-CSCF300a) is acquired and notified to the user terminal 50. Therefore, the user terminal 50 can perform a communication connection process using the address information. In this case, the user terminal 50 communicates with the P-CSCF 300a, which is a call processing device in the home network, to enable reliable connection processing without performing a connection test or the like with the local network P-CSCF.

Further, when the determination unit 102 determines that the call processing device is not set in the home network of the user terminal, the acquisition unit 103 makes an emergency call from the communication management device (PGW200) of the communication carrier A in the service area network. The address information of the call processing apparatus (P-CSCF300) for processing the call signal of a predetermined type such as is acquired.

With this configuration, even if there is no setting of a call processing device for processing an emergency call or the like in the home network, communication connection processing such as an emergency call can be performed.

Further, in the MME 100 of the embodiment of the present disclosure, the determination unit 102 further determines whether or not the user terminal 50 is a terminal roaming in from the network of an overseas business operator. The determination unit 102 determines that the user terminal is a terminal roaming in from the network of an overseas carrier, or the user terminal is not a terminal roaming in from the network of an overseas carrier, and the other communication business. If it is determined that the call processing device (P-CSCF300a) is not set by the person (telecommunications carrier B), the acquisition unit 103 is a communication management device of the network in the area (network of the telecommunications carrier A). The address information of the call processing device (P-CSCF300) for processing a predetermined type of call signal is acquired from (PGW200).

As a result, when the P-CSCF300a for emergency call is not set in the overseas roaming-in terminal or the home network, the address information of the P-CSCF300 in the local network is acquired and the user terminal is made to perform the communication connection process. be able to.

Generally, when a user terminal (domestic roaming-in terminal) whose home network is the network of another telecommunications carrier in Japan is located in the network of another telecommunications carrier in the same country, the user terminal is used. The distance between the local network and the home network is short. On the other hand, if a user terminal (overseas roaming-in terminal) whose home network is the network of an overseas telecommunications carrier is located in the network of a telecommunications carrier in Japan (for example, Japan), the home network and the user terminal are present. The distance to the area network is long.

When processing an emergency call from a roaming-in terminal (whether domestic or overseas), the standardization technique described in the above-mentioned prior art should be followed, but in a specific case, the above-mentioned embodiment of the present embodiment. The method described in (Emergency call processing on the home network) may be advantageous.

The block diagram used in the description of the above embodiment shows a block 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 using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , 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 (component) that makes transmission function is called a transmitting unit or a transmitter. In each case, as described above, the realization method is not particularly limited.

For example, the MME 100 or the like in one embodiment of the present disclosure may function as a computer that processes the communication control method of the present disclosure. FIG. 5 is a diagram showing an example of the hardware configuration of the MME 100 according to the embodiment of the present disclosure. The above-mentioned MME 100 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

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 MME 100 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.

For each function in the MME 100, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an calculation, controls communication by the communication device 1004, and controls the communication by the communication device 1004, and the memory 1002 and the storage. It is realized by controlling at least one of reading and writing of data in 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by 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 above-mentioned determination unit 102 and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 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 determination unit 102 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks. Although it has been described 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 mounted by one or more chips. The program may be transmitted from the network via a telecommunication line.

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

The storage 1003 is a computer-readable recording medium, 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, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 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 memory 1002 and the storage 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 communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of FDD (Frequency Division Duplex) and Time Division Duplex (TDD). It may be composed of. For example, the above-mentioned receiving unit 101, acquisition unit 103, notification unit 104, and the like may be realized by the communication device 1004. The receiving unit 101 and the notification unit 104 may be physically or logically separated from each other.

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 memory 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.

Further, the MME 100 is configured to include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). The hardware may realize a part or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

The notification of information is not limited to the embodiments / embodiments described in the present disclosure, and may be performed by other methods. For example, information notification includes physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (eg, 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. Further, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an 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)) )), LTE 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 disclosure 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.

In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and the like 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 place (for example, a memory), or may be managed using a management table. Information to be input / output may 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 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, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, 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 amendments and modifications without departing from the spirit and scope of the present disclosure as determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration and does not have any limiting meaning to this disclosure.

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

Further, software, instructions, information and the like may be transmitted and received via a transmission medium. For example, a website that 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 this 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 are voltages, currents, 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 an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the parameters mentioned above are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (eg, 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 in any respect limited names. is not.

In the present disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group" Terms such as "carrier" and "component carrier" may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by (Remote Radio Head). The term "cell" or "sector" is used in this coverage as part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services. Point to.

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 used by those skilled in the art as 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. 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, a 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.

Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the user terminal 50 may have the functions of the above-mentioned base station. Further, the words such as "up" and "down" may be read as words corresponding to the communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

Similarly, the user terminal in the present disclosure may be read as a base station. In this case, the base station may have the functions of the user terminal 50 described above.

The terms "determining" and "determining" 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. It may include (for example, accessing data in memory) to be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action 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 energy 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".

When "include", "including" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, 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 plural nouns following these articles.

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".

50 ... user terminal, 100 ... MME, 101 ... reception unit, 102 ... judgment unit, 103 ... acquisition unit, 104 ... notification unit, 200, 200a ... PGW, 300, 300a ... P-CSCF.

Claims (3)

In a communication control device that controls communication of user terminals whose home network is the network of another telecommunications carrier.
A receiving unit that receives a predetermined type of call signal from the user terminal,
Upon receiving the predetermined type of call signal, a determination unit for determining whether or not a call processing device for processing the predetermined type of call signal provided by the other telecommunications carrier is set, and a determination unit.
When it is determined that the call processing device is set, the acquisition unit that acquires the address information of the call processing device from the communication management device of the other communication carrier, and the acquisition unit.
A notification unit that notifies the user terminal of the address information acquired by the acquisition unit, and
Equipped with
The predetermined type of call signal is an emergency call for making a communication connection to an emergency organization.
Communication control device. When the acquisition unit determines that the call processing device is not set, the acquisition unit obtains the address information of the call processing device for processing a predetermined type of call signal from the communication management device of the communication carrier in the area network. The communication control device according to claim 1 to be acquired. The judgment unit
Judging whether the user terminal is a terminal roaming in from the network of an overseas business operator,
When it is determined that the user terminal is a terminal roaming in from the network of an overseas carrier, or when the user terminal is not a terminal roaming in from the network of an overseas carrier, the other carrier If it is determined that the call processing device is not set,
The acquisition unit
Acquires the address information of the call processing device for processing the predetermined type of call signal from the communication management device of the communication carrier of the local network.
The communication control device according to claim 1 or 2 .

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