JP6417177B2 - Communication control device, communication control system, and communication control method - Google Patents

Communication control device, communication control system, and communication control method Download PDF

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JP6417177B2
JP6417177B2 JP2014207421A JP2014207421A JP6417177B2 JP 6417177 B2 JP6417177 B2 JP 6417177B2 JP 2014207421 A JP2014207421 A JP 2014207421A JP 2014207421 A JP2014207421 A JP 2014207421A JP 6417177 B2 JP6417177 B2 JP 6417177B2
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communication
communication terminal
terminal
location registration
incoming call
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JP2016076888A (en
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悠行 稲葉
悠行 稲葉
陽一 神谷
陽一 神谷
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株式会社Nttドコモ
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  The present invention relates to a communication control device, a communication control system, and a communication control method.

  As a technology for realizing voice communication on an LTE (Long Term Evolution) network, a VoLTE (Voice over LTE) technology is known (see, for example, Patent Document 1). In VoLTE, voice communication is performed through a packet switching network in the same manner as other data communications by converting voice into data.

JP 2013-197932 A

  When voice communication is performed between a communication terminal such as a mobile phone and a fixed telephone, a communication fee may be charged according to the distance between the communication terminal and the fixed telephone. The distance is specified, for example, by acquiring a CA (Charging Area) set for each communication network in a predetermined area. That is, by acquiring CA, a communication network (communication network in a predetermined area) where the communication terminal is located is specified, and a distance between the communication network in the predetermined area and the fixed telephone is derived, so that the communication terminal and The distance between landlines is identified. Conventionally, in a communication terminal having location information of both 3G network and LTE network, the distance between the communication terminal and the fixed telephone is specified by acquiring the CA from the 3G network exchange.

  However, among communication terminals that support voice communication by VoLTE, there are communication terminals that do not support the 3G network communication method provided by the communication carrier. If such a distance between the communication terminal and the fixed telephone is specified from the CA of the 3G network exchange, there is a possibility that a distance greatly different from the actual distance may be specified. As a result, there is a possibility that the voice communication fee may not be charged according to the distance between the communication terminal and the fixed telephone.

  The present invention has been made in view of the above circumstances, and by appropriately specifying the distance between the communication terminal and the fixed telephone, it is possible to charge a voice communication fee according to the distance between the communication terminal and the fixed telephone. An object of the present invention is to provide a communication control device, a communication control system, and a communication control method.

  The communication control device according to the present invention has a receiving means for receiving a location registration request from a communication terminal, and a function for the communication terminal to communicate in the first communication network based on the location registration request received by the receiving means. A position registration request including information indicating a result of the determination when the determination unit determines that the communication terminal is a communication disabled terminal. Transmitting means for transmitting.

  In the communication control apparatus according to the present invention, based on the location registration request transmitted from the communication terminal, it is determined whether or not the communication terminal is a communication-disabled terminal that does not have a function of performing communication in the first communication network. Is done. When it is determined that the terminal is not capable of communication, a location registration request including information indicating the determination result is transmitted. For this reason, in the host device that has received the location registration request from the communication control device according to the present invention, it is specified whether or not the communication terminal is a communication-disabled terminal. This prevents, for example, information indicating the position of a communication-disabled terminal that does not have a function of performing communication in the first communication network from being acquired from information indicating the position related to the first communication network. be able to. As a result, when voice communication is performed between the communication terminal and the fixed telephone, the distance from the communication network in which the communication terminal is located to the fixed telephone can be appropriately specified, and according to the distance Appropriate voice communication charges can be charged.

  The communication control device according to the present invention is a terminal information for receiving a location registration request including information indicating whether or not a communication terminal is a non-communication terminal that does not have a function of performing communication in the first communication network. Based on the location registration request received by the receiving means, the terminal information receiving means, storage means for storing information indicating whether or not the communication terminal for each user is a non-communication terminal, and receiving an incoming call notification to the communication terminal The communication terminal communicates with the incoming call reception means, the incoming call determination means for determining whether or not the communication terminal that has received the incoming call notification is an incommunicable terminal stored in the storage means, and the incoming call determination means. An acquisition unit configured to acquire information indicating a position related to a second communication network that is a communication network different from the first communication network when it is determined that the terminal is an unusable terminal;

  In the communication control apparatus according to the present invention, it is determined whether or not the communication terminal that has received the incoming call notification is a pre-stored communication disabled terminal. If the terminal is a communication-impossible terminal, the position related to the second communication network, which is a communication network different from the first communication network, is acquired. For this reason, it is prevented that information indicating a position related to the first communication network in which the communication terminal cannot be located is acquired as information indicating the position of the communication terminal. Thereby, when voice communication is performed between the communication terminal and the fixed telephone, the distance from the communication network (second communication network) where the communication terminal is actually located to the fixed telephone is appropriately specified. And an appropriate voice communication fee can be charged according to the distance.

  The communication control device according to the present invention includes a location information storage means for storing location information related to the first communication network of the communication terminal and location information related to the second communication network, and the communication terminal performs the first communication. A terminal information receiving means for receiving a location registration request including information indicating whether or not the terminal is a non-communicatable terminal that does not have a communication function in the network, and communicates with the location registration request received by the terminal information receiving means A location information deletion unit that deletes the location information related to the first communication network stored in the location information storage unit when information indicating that the terminal is a non-communication terminal is included. .

  In the communication control device according to the present invention, when the communication terminal related to the location registration request is a terminal that cannot communicate, the location information related to the first communication network is deleted. For this reason, it is prevented that information indicating a position related to the first communication network in which the communication terminal cannot be located is acquired as information indicating the position of the communication terminal.

  A communication control system according to the present invention is a communication control system including a first communication control device and a second communication control device, and the first communication control device receives a location registration request from a communication terminal. A determination unit that determines whether the communication terminal is a non-communication terminal that does not have a function of performing communication in the first communication network based on the location registration request received by the reception unit; Means for transmitting a location registration request including information indicating the result of the determination when the communication terminal determines that the communication terminal is a non-communication terminal, and the second communication control device includes: The terminal information receiving means for receiving the location registration request transmitted from the transmitting means of the first communication control device, and the communication terminal for each user is a communication-impossible terminal based on the location registration request received by the terminal information receiving means. Indicates whether there is Storage means for storing information, incoming call reception means for receiving an incoming call notification to the communication terminal, and whether or not the communication terminal from which the incoming call reception means has received the incoming call notification is a non-communication terminal stored in the storage means Information indicating the position of the second communication network, which is a communication network different from the first communication network, when the incoming call determination means and the incoming call determination means determine that the communication terminal is a non-communication terminal. Obtaining means for obtaining.

  The communication control method according to the present invention has a reception step for receiving a location registration request from a communication terminal, and a function for the communication terminal to communicate in the first communication network based on the location registration request received in the reception step. A determination step for determining whether the communication terminal is not capable of communication, and a location registration request including information indicating the result of the determination when the communication terminal is determined to be a non-communication terminal in the determination step. The communication terminal for each user is a communication-impossible terminal based on the transmission step for transmitting the information, the terminal information reception step for receiving the location registration request transmitted in the transmission step, and the location registration request received in the terminal information reception step A storage step for storing information indicating whether or not, an incoming call reception step for receiving an incoming call notification to the terminal, and an incoming call reception step When the communication terminal that has received the communication notification is an incoming call determination step for determining whether or not the communication terminal stored in the storing step is a communication disabled terminal, and in the incoming call determination step, the communication terminal is determined to be a communication disabled terminal, An acquisition step of acquiring information indicating a position related to a second communication network which is a communication network different from the first communication network.

  ADVANTAGE OF THE INVENTION According to this invention, the distance between a communication terminal and a fixed telephone can be specified appropriately, and the voice communication charge according to the distance between a communication terminal and a fixed telephone can be charged.

It is the schematic which shows the structure of the communication control system which concerns on this embodiment. It is a figure which shows the hardware constitutions of each node contained in the communication control system of this embodiment. It is a figure which shows the position registration process image of the communication control system which concerns on this embodiment. It is a figure which shows the incoming call process image of the communication control system which concerns on this embodiment. It is a block diagram which shows the function of MME which concerns on this embodiment. It is a block diagram which shows the function of HSS which concerns on this embodiment. It is a flowchart which shows the position registration process of MME which concerns on this embodiment. It is a flowchart which shows the location registration process of HSS which concerns on this embodiment. It is a flowchart which shows the incoming process of HSS which concerns on this embodiment. It is a sequence diagram which shows the position registration process of the communication control system which concerns on this embodiment. It is a sequence diagram which shows the incoming call process of the communication control system which concerns on this embodiment. It is a figure which shows the incoming call process image of the communication control system which concerns on a comparative example. It is a flowchart which shows the location registration process of HSS which concerns on a modification.

  Embodiments according to the present invention will be described below with reference to the drawings. Where possible, the same parts are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic diagram illustrating a configuration of a communication control system according to the present embodiment. The communication control system 1 is a system that acquires information indicating the position of the communication terminal 10 related to incoming call processing. For example, when voice communication is performed between a communication terminal 10 such as a mobile phone and a fixed telephone (not shown), a communication fee is charged according to the distance between the communication terminal 10 and the fixed telephone. The communication control system 1 is used to appropriately acquire (specify) information indicating the position of the communication terminal 10 in order to realize charging according to such a distance.

  As shown in FIG. 1, a communication control system 1 includes a communication terminal 10, an eNB (evolved Node B) 11, an MME (Mobility Management Entity) 12, an RNC (Radio Network Controller) 21, an MSC (Mobile Switching Center). ) 22, an HSS (Home Subscriber Server) 30, and an ASN (Application Serving Node) 40. The eNB 11 and the MME 12 have an LTE (Long Term Evolution) network (second communication network) configuration, and the RNC 21 and the MSC 22 have a 3G (3rd. Generation) network (first communication network) configuration. In this embodiment, WCDMA (Wideband Code Division Multiple Access) (registered trademark) is adopted as a communication method in the 3G network.

  FIG. 2 is a diagram illustrating a hardware configuration of each node included in the communication control system of the present embodiment. That is, the eNB 11, the MME 12, the RNC 21, the MSC 22, the HSS 30, and the ASN 40 shown in FIG. 1 each physically has one or more CPUs 111, a RAM 112 and a ROM 113, which are main storage devices, as shown in FIG. The computer system includes an input device 114 such as a keyboard and mouse as devices, an output device 115 such as a display, a communication module 116 as a data transmission / reception device such as a network card, an auxiliary storage device 117 such as a semiconductor memory, and the like. .

  The function of each node is to read one or a plurality of predetermined computer software on the hardware such as the CPU 111 and the RAM 112 shown in FIG. 2 and thereby control the input device 114, the output device 115, and the communication module under the control of the CPU 111. This is realized by operating 116 and reading and writing data in the RAM 112 and the auxiliary storage device 117.

  First, basic functions of each component of the communication control system 1 will be described. The communication terminal 10 is a mobile communication terminal capable of communicating by being in a mobile communication network (hereinafter simply referred to as a communication network), such as a mobile phone or a tablet PC. The communication terminal 10 is located in the LTE network by transmitting and receiving radio waves to and from the eNB 11 and communicates with a BTS (Base Transceiver Station) (not shown) that is a radio base station provided corresponding to the RNC 21. It is located in the 3G network by transmitting and receiving radio waves between them. The communication terminal 10 is a VoLTE compatible terminal that can receive a VoLTE (Voice over LTE) service when LTE is present.

  The eNB 11 is a radio base station and a communication control device having a radio access control function. The eNB 11 has, as basic functions, an admission control function when there is a call from the communication terminal 10 and a paging function that calls the communication terminal when an incoming call is received from another communication terminal. Also, the eNB 11 forms an LTE area, and when the communication terminal 10 is in the LTE area, the eNB 11 can perform radio communication according to the LTE scheme between the eNB 11 and the communication terminal 10. The communication terminal 10 communicates with MME12 etc. which are the high-order apparatuses of eNB11 via eNB11.

  The MME 12 is an exchange that accommodates the eNB 11 and performs mobility control and bearer control. The MME 12 has, as basic functions, a location registration function of the communication terminal 10, a paging function that calls the eNB 11 when an incoming call is received from another communication terminal, an authentication management function of the communication terminal 10, and the like. Details of the functions of the MME 12 at the time of location registration and incoming call will be described later.

  The RNC 21 is a communication control device having a radio access control function. The RNC 21 is provided corresponding to a BTS (not shown) that is a radio base station, and performs processing related to radio communication of the communication terminal 10 located in the 3G area formed by the BTS. Specifically, the RNC 21 performs line connection processing, handover processing, and the like of the communication terminal 10.

  The MSC 22 is an exchange that accommodates the RNC 21 and has, as basic functions, a connection function between the radio access network and the IMS network, a voice transfer function, and the like.

  The HSS 30 is a subscriber information management server (subscriber information management database) that manages contract information, authentication information, and location information of communication terminals such as the communication terminal 10. The HSS 30 is connected to the MME 12 and the MSC 22. Details of the function of the HSS 30 at the time of location registration and incoming call will be described later. The ASN 40 is a communication control device that performs service control of voice communication.

  Next, a processing image of the communication control system 1 related to location registration and incoming call of the communication terminal 10 will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram illustrating a position registration processing image of the communication control system according to the present embodiment. FIG. 4 is a diagram showing an incoming call processing image of the communication control system according to the present embodiment. The WCDMA incompatible terminal 10a described below is a communication terminal 10 that does not support the WCDMA system (that is, does not have a function of performing communication in the 3G network of the present embodiment).

  As shown in FIG. 3, during the location registration process, the WCDMA non-compliant terminal 10 a located in the LTE area transmits a location registration signal (location registration request) to the MME 12. The location registration signal includes information (EPS-only) indicating that the WCDMA non-compliant terminal 10a is a terminal (communication impossible terminal) that does not have a function of performing communication in the 3G network. The MME 12 receives the location registration signal from the WCDMA non-compliant terminal 10a, and specifies that the location registration signal includes information (EPS-only) indicating that it is a communication disabled terminal. In this case, the MME 12 transmits to the HSS 30 a location registration signal (location registration request) including information (EPS-only) indicating that the WCDMA non-compliant terminal 10a is a non-communication terminal. And HSS30 performs the various processing which concerns on a location registration, specifies a communication impossible terminal from a location registration signal, and memorize | stores it.

  Further, as shown in FIG. 4, at the time of incoming call processing, the ASN 40 first receives an incoming signal addressed to the WCDMA non-compliant terminal 10 a from the fixed telephone and transmits an incoming call notification to the HSS 30. Here, if the communication terminal 10 has been in the LTE network, the HSS 30 holds information on the MME 12 in the area (MME information) as the area information of the communication terminal 10. Similarly, if the communication terminal 10 has been in the 3G network, the HSS 30 holds information on the MSC 22 that has been in the area (MSC information) as the area information of the communication terminal 10. As described above, when there is an incoming call to the communication terminal 10 that holds both the LTE network and 3G network location information, the HSS 30 normally preferentially acquires the 3G network CA (Charging Area). The CA is a charge area identification code used in the inter-carrier charge, and is a code for specifying the position of the communication terminal 10 for voice communication charging.

  Here, the WCDMA non-compliant terminal 10a cannot be located in the WCDMA 3G network. Therefore, normally, the MSC information of the WCDMA non-compliant terminal 10a is not held in the HSS 30. However, for example, when the WCDMA non-compliant terminal 10a is a SIM-free terminal that can be used without depending on a SIM (Subscriber Identity Module) card for each communication carrier, the MSC information of the WCDMA non-compliant terminal 10a is held in the HSS 30. There is a case. In other words, the SIM card inserted into the WCDMA compatible terminal 10b, which is the WCDMA compatible communication terminal 10 in the 3G network area, is replaced on the way with the WCDMA non compatible terminal 10a, and then the WCDMA non compatible terminal 10a is connected to the LTE network. In some cases, the MSC information of the WCDMA incompatible terminal 10a (more specifically, the MSC information of the SIM card inserted into the WCDMA incompatible terminal 10a) may be held in the HSS 30. In this case, the HSS 30 that has received the incoming notification of the WCDMA non-compliant terminal 10a acquires the CA of the 3G network (CA1 in FIG. 4). However, the CA is a CA of the 3G network when the SIM card is replaced with the WCDMA incompatible terminal 10a, and is not a CA according to the current position of the WCDMA incompatible terminal 10a. Therefore, in this case, there is a possibility that a distance significantly different from the actual distance may be specified as the distance between the WCDMA non-compliant terminal 10a and the fixed telephone.

  In the communication control system 1, as described above, the HSS 30 stores information on terminals that cannot communicate. Therefore, the HSS 30 refers to the information of the communication disabled terminal when receiving the incoming notification from the ASN 40, and if the communication terminal 10 related to the incoming call is the WCDMA non-compliant terminal 10a (communication disabled terminal), the location information The CA of the LTE network (CA2 in FIG. 4) can be acquired without depending on this. As a result, the position of the WCDMA non-compliant terminal 10a is obtained from the information indicating the position of the communication network where the WCDMA non-compliant terminal 10a is actually located, and the distance between the WCDMA non-compliant terminal 10a and the fixed telephone is appropriately set. Can be derived. Hereinafter, each function related to the location registration process and the incoming call process of the communication control system 1 described with reference to FIGS. 3 and 4 will be described in detail.

  Next, details of the functions of the MME will be described with reference to FIG. FIG. 5 is a block diagram illustrating functions of the MME according to the present embodiment. As shown in FIG. 5, the MME 12 (first communication control device) includes a communication unit 121 (reception unit, transmission unit), a determination unit 122 (determination unit), a call processing control unit 123, and a signal construction unit. 124.

  The communication unit 121 transmits and receives signals between the communication terminal 10 and the HSS 30. Specifically, the communication unit 121 is a receiving unit that receives a location registration signal (location registration request) from the communication terminal 10. The location registration signal includes a parameter indicating whether or not the communication terminal 10 is a WCDMA non-compliant terminal 10a (communication impossible terminal) that does not have a function of performing communication in the 3G network. When the communication terminal 10 is a WCDMA non-compliant terminal 10a, “EPS-only” is set as the parameter. The communication unit 121 outputs the received location registration signal to the determination unit 122. The communication unit 121 is a transmission unit that transmits the location registration signal (location registration request) generated by the signal construction unit 124 to the HSS 30.

  Further, the communication unit 121 receives a CA acquisition request from the HSS 30 at the time of an incoming call. In this case, the communication unit 121 transmits an incoming call response including the CA value set in the MME 12 to the HSS 30.

  The determination unit 122 is a determination unit that determines whether the communication terminal 10 is a WCDMA non-compliant terminal 10a that does not have a function of performing communication in the 3G network based on the location registration signal received by the communication unit 121. is there. The determination unit 122 analyzes the parameter of the location registration signal received by the communication unit 121. If “EPS-only” is set as the parameter, the determination unit 122 determines that the communication terminal 10 is a WCDMA-incompatible terminal 10a. To do. In this case, the determination unit 122 temporarily holds information indicating that “EPS-only” is set in the parameter (EPS-only information). The determination unit 122 outputs information indicating that the determination is completed to the call processing control unit 123.

  The call processing control unit 123 performs various call processing. The call processing control unit 123 outputs information indicating that the call processing is completed to the signal construction unit 124 after the call processing is completed. The signal construction unit 124 generates a location registration signal transmitted from the communication unit 121. The signal construction unit 124 determines whether “EPS-only” is set, that is, whether the determination unit 122 holds EPS-only information. If the EPS-only information is held, Then, a location registration signal in which the EPS-only information is set is generated. The call processing control unit 123 outputs the generated location registration signal to the communication unit 121.

  Next, details of the functions of the HSS 30 will be described with reference to FIG. FIG. 6 is a block diagram showing functions of the HSS according to the present embodiment. As shown in FIG. 6, the HSS 30 (second communication control device) includes a communication unit 301 (terminal information reception unit, incoming call reception unit), a location registration processing unit 302, and an incoming call processing unit 303 (incoming call determination unit, Acquisition means) and a subscriber DB 304 (storage means).

  The communication unit 301 transmits and receives signals between the MME 12 and the ASN 40. Specifically, the communication unit 301 is a terminal information receiving unit that receives a location registration signal including information indicating whether or not the communication terminal 10 is a WCDMA non-compliant terminal 10a from the MME 12. When the communication terminal 10 is a WCDMA non-compliant terminal 10a, EPS-only information is set in the location registration signal. The communication unit 301 outputs the received location registration signal to the location registration processing unit 302. In addition, the communication unit 301 transmits the location registration response signal output from the location registration processing unit 302 to the MME 12.

  The communication unit 301 is an incoming call reception unit that receives an incoming call notification to the communication terminal 10 from the ASN 40. Further, the communication unit 301 transmits a CA acquisition request to the MME 12 or the MSC 22 and acquires the CA included in the incoming call response received from these. Then, an incoming call response including the CA is transmitted to the ASN 40.

  The location registration processing unit 302 performs processing related to location registration of the communication terminal 10. The location registration processing unit 302 includes a signal analysis unit 302a and a call processing control unit 302b.

  Based on the location registration signal received by the communication unit 301, the signal analysis unit 302a determines whether or not the communication terminal 10 is a WCDMA non-compliant terminal 10a. Specifically, the signal analysis unit 302a analyzes the parameter of the location registration signal, and determines that the communication terminal 10 is a WCDMA non-compliant terminal 10a when EPS-only information is set in the location registration signal. To do. The signal analysis unit 302a outputs the determination result to the call processing control unit 302b.

  The call processing control unit 302b performs various call processing. When EPS-only information is set in the location registration signal, the call processing control unit 302b associates the EPS-only information with the communication terminal 10 related to the location registration signal and stores it in the subscriber DB 304. That is, the subscriber DB 304 is a storage unit that stores EPS-only information that is information indicating whether or not the communication terminal 10 for each user is a WCDMA non-compliant terminal 10a. The subscriber DB 304 stores an identifier (user identifier) indicating each user and EPS-only information in association with each other. In addition, the call processing control unit 302b outputs a location registration response signal corresponding to the location registration signal from the MME 12 to the communication unit 301.

  The subscriber DB 304 stores location information of the communication terminal 10 for each user. That is, the MME information described above is stored if the user has been in the LTE network, and the MSC information is stored if the user has been in the 3G network.

  The incoming call processing unit 303 performs processing related to the incoming call of the communication terminal 10. The incoming call processor 303 includes a signal analyzer 303a and a call processing controller 303b.

  The signal analysis unit 303a analyzes the parameters of the incoming notification signal received by the communication unit 301, and identifies the user identifier of the communication terminal related to the incoming notification. The signal analysis unit 303a outputs the user identifier to the call processing control unit 303b.

  The call processing control unit 303b performs various call processing. The call processing control unit 303b refers to the subscriber DB 304 and determines whether the user identifier input from the signal analysis unit 303a exists in the subscriber DB 304. The communication terminal 10 whose user identifier exists in the subscriber DB 304 is a WCDMA non-compliant terminal 10a. That is, the call processing control unit 303b is an incoming call determination unit that determines whether or not the communication terminal 10 that has received the incoming call notification is a WCDMA non-compliant terminal 10a.

  Further, the call processing control unit 303b acquires information (that is, CA) indicating a position related to a predetermined communication network (more specifically, the communication unit 301 acquires the information) according to the result of the incoming call determination. It is. That is, when it is determined in the above incoming call determination that the communication terminal 10 is a WCDMA non-compliant terminal 10a, the call processing control unit 303b determines whether the subscriber DB 304 has 3G network location information. Regardless, the CA of the LTE network is acquired from the MME 12. In this case, the call processing control unit 303b causes the MME 12 to transmit a T-ADS (Terminating-Access Domain Selection) request to the communication unit 301 to inquire about the time when the communication terminal 10 last accessed the LTE network. On the other hand, when it is determined in the incoming call determination that the communication terminal 10 is not the WCDMA non-compliant terminal 10a, the call processing control unit 303b acquires the CA of the 3G network from the MSC 22. In this case, the call processing control unit 303b causes the MSC 22 to transmit the T-ADS request to the communication unit 301 to inquire about the time when the communication terminal 10 last accessed the 3G network. However, if the subscriber DB 304 does not have the location information of the 3G network, the CA of the LTE network is acquired from the MME 12.

  Next, the location registration process of the MME 12 will be described with reference to FIG. FIG. 7 is a flowchart showing the MME location registration process according to the present embodiment.

  As shown in FIG. 7, when the location registration signal from the communication terminal 10 is received by the communication unit 121 (step S1), the determination unit 122 analyzes the parameters of the location registration signal (step S2). By this analysis, it is determined whether or not “EPS-only” is set as a parameter of the position registration signal (step S3). If “EPS-only” is set, the EPS-only information is determined by the determination unit. 122 is temporarily held (step S4).

  Subsequently, after various call processing is performed by the call processing control unit 123 (step S5), the signal construction unit 124 determines whether the EPS-only information is held in the determination unit 122 (step S6). . If it is determined that the information is held in S6, the signal construction unit 124 sets the EPS-only information as a location registration signal (Step S7), and a location registration signal is generated (Step S8). Finally, the location registration signal is transmitted to the HSS 30 by the communication unit 121 (step S9).

  Next, the location registration process of the HSS 30 will be described with reference to FIG. FIG. 8 is a flowchart showing HSS location registration processing according to the present embodiment.

  As shown in FIG. 8, when the location registration signal from the MME 12 is received by the communication unit 301 (step S11), the signal analysis unit 302a analyzes the parameters of the location registration signal (step S12). Based on the analysis, it is determined whether EPS-only information is set in the location registration signal (step S13). If EPS-only information is set, the call processing control unit 302b performs EPS-only information. Information and the communication terminal 10 related to the location registration signal are linked and stored in the subscriber DB 304. Thereby, in the subscriber DB 304, an identifier (user identifier) indicating each user and the EPS-only information are stored in association with each other (step S14). Finally, various call processes are performed by the call process control unit 302b (step S15).

  Next, the incoming call processing of the HSS 30 will be described with reference to FIG. FIG. 9 is a flowchart showing the incoming HSS process according to the present embodiment.

  As shown in FIG. 9, when the communication unit 301 receives a voice call (incoming notification) transmitted from the ASN 40 to the communication terminal 10 (step S21), the call processing control unit 303b refers to the subscriber DB 304. Then, it is determined whether the user identifier of the communication terminal 10 exists in the subscriber DB 304, that is, whether the EPS-only information of the communication terminal 10 is stored in the subscriber DB 304 (step S22).

  If the EPS-only information of the communication terminal 10 is stored in the subscriber DB 304 in S22, that is, if it is determined that the communication terminal 10 is the WCDMA non-compliant terminal 10a, the call processing control unit 303b performs the subscriber DB 304. Regardless of whether the 3G network has location information or not, the CA of the LTE network, which is information indicating the location of the LTE network, is acquired from the MME 12 (step S23). In this case, the call processing control unit 303b causes the MME 12 to transmit to the communication unit 301 a T-ADS request that inquires about the time when the communication terminal 10 last accessed the LTE network (step S23).

  On the other hand, when it is determined in S22 that the EPS-only information of the communication terminal 10 is not stored in the subscriber DB 304, that is, the communication terminal 10 is not the WCDMA non-compliant terminal 10a, the call processing control unit 303b performs the 3G network. The CA is acquired from the MSC 22 (step S24). In this case, the call processing control unit 303b causes the MSC 22 to transmit the T-ADS request to the communication unit 301 to inquire about the time when the communication terminal 10 last accessed the 3G network. However, when the subscriber DB 304 does not have the location information of the 3G network, the CA of the LTE network is acquired from the MME 12 (step S24). Finally, various incoming calls processing of the HSS 30 is performed by the call processing control unit 303b (step S25).

  Next, the location registration process as the entire communication control system will be described with reference to FIG. FIG. 10 is a sequence diagram showing a location registration process of the communication control system according to the present embodiment.

  As illustrated in FIG. 10, a location registration signal (EMM_Attach Request) is transmitted from the communication terminal 10 to the eNB 11 (step S101). The location registration signal includes a parameter (EPS attach type) indicating whether or not the communication terminal 10 is a WCDMA non-compliant terminal 10a. The location registration signal is further transmitted to the MME 12 by the eNB 11 (step S102).

  Subsequently, the parameter (EPSattach type) of the location registration signal is determined by the determination unit 122 of the MME 12 (step S103). When “EPS-only” is set as a parameter in S103 (when EPS attach type is EPS Attach), the position where EPS-only information (EPS-Only-Flag) is set by the communication unit 121 of the MME 12 A registration signal (Diameter_Update Location Request) is transmitted to the HSS 30 (step S104).

  In the subscriber DB 304 of the HSS 30 that has received the location registration signal, the user identifier of the communication terminal 10 and the EPS-only information (EPS-Only-Flag) are stored in association with each other (step S105). And the location registration response signal (Diameter_Update Location Answer) according to the location registration signal from MME12 is transmitted to MME12 by the communication part 301 of HSS30 (step S106).

  On the other hand, if “EPS-only” is not set as a parameter of the location registration signal in S103, a location registration signal (Diameter_Update Location Request) in which EPS-only information (EPS-Only-Flag) is not set. Is transmitted from the communication unit 121 of the MME 12 to the HSS 30 (step S107). In the subscriber DB 304 of the HSS 30 that has received the location registration signal, the EPS-only information (EPS-Only-Flag) stored in association with the user identifier of the communication terminal 10 is deleted (step S108). And the location registration response signal (Diameter_Update Location Answer) according to the location registration signal from MME12 is transmitted to MME12 by the communication part 301 of HSS30 (step S109). After S106 or S109, the normal VoLTE attach process is continued (step S110).

  Next, the incoming call processing as the entire communication control system will be described with reference to FIG. FIG. 11 is a sequence diagram showing an incoming call process of the communication control system according to the present embodiment.

  As shown in FIG. 11, when an incoming voice call from the fixed telephone to the communication terminal 10 is received at the ASN 40 (step S121), an incoming call notification is made from the ASN 40 to the HSS 30 (step S122). Then, the call processing control unit 303b of the HSS 30 that has received the incoming notification refers to the subscriber DB 304, and whether the user identifier of the communication terminal 10 exists in the subscriber DB 304, that is, the EPS-only information of the communication terminal 10 is present. It is determined whether it is stored in the subscriber DB 304 (step S123).

  If it is determined in S123 that EPS-only information is stored in the subscriber DB 304, a CA acquisition request is transmitted from the call processing control unit 303b of the HSS 30 to the MME 12 (step S124). In response to the acquisition request, the communication unit 121 of the MME 12 transmits an incoming call response including the CA to the HSS 30 (step S125). The communication unit 301 of the HSS 30 acquires the CA included in the received incoming call response and transmits the incoming call response including the CA to the ASN 40 (step S126). The position of the communication terminal 10 is specified according to the value of the CA, and a communication fee according to the distance between the communication terminal 10 and the fixed telephone is charged. In the ASN 40 that has acquired the CA value, normal incoming call processing is continued (step S127).

  Next, operational effects of the communication control system 1 according to the present embodiment will be described in comparison with the communication control system 501 (FIG. 12) according to the comparative example. FIG. 12 is a diagram illustrating an incoming call processing image of the communication control system according to the comparative example.

  In the communication control system 501 according to the comparative example shown in FIG. 12, the SIM card inserted into the WCDMA compatible terminal 10b, which is the WCDMA compatible communication terminal 10 in the 3G network coverage area, is replaced in the middle with the WCDMA non-compatible terminal 10a. Then, consider a case in which the WCDMA non-compliant terminal 10a subsequently moves to the LTE network related to the MME 512. In this case, the MSC information of the WCDMA non-compliant terminal 10a (more specifically, the MSC information of the SIM card inserted into the WCDMA non-compliant terminal 10a) is stored in the HSS 530 as the location information. For this reason, the HSS 530 that has received the incoming notification from the fixed telephone to the WCDMA non-compliant terminal 10a requests the CA from the MSC 22 of the 3G network and acquires the CA of the MSC 22 (CA1 in FIG. 12).

  However, the CA1 is a 3G network (MSC22) CA when the SIM card is replaced with the WCDMA non-compliant terminal 10a, and is not a CA according to the current position of the WCDMA noncompliant terminal 10a. Therefore, in this case, there is a possibility that a distance significantly different from the actual distance may be specified as the distance between the WCDMA non-compliant terminal 10a and the fixed telephone.

  In this regard, in the communication control system 1 according to the present embodiment, whether or not the communication terminal 10 is a WCDMA non-compliant terminal 10a based on the position registration signal transmitted from the communication terminal 10 during the position registration process in the MME 12. Is determined. Specifically, the parameter of the location registration signal is analyzed by the determination unit 122, and it is determined whether or not “EPS-only” is set as the parameter. When it is determined that “EPS-only” is set and the communication terminal 10 is a non-WCDMA compatible terminal 10a, a location registration signal in which EPS-only information, which is information indicating the determination result, is set. Is transmitted to the HSS 30 by the communication unit 121.

  For this reason, in HSS30 which received the location registration signal from MME12, it is specified whether the communication terminal 10 is the WCDMA non-corresponding terminal 10a. As a result, it is possible to prevent information indicating the position of the WCDMA non-compliant terminal 10a not having a function of performing communication in the 3G network from being acquired from information indicating the position related to the 3G network, that is, the CA of the MSC 22. it can. As a result, when voice communication is performed between the communication terminal 10 and the fixed telephone, the distance from the communication network in which the communication terminal 10 is located to the fixed telephone can be appropriately specified. Accordingly, an appropriate voice communication fee can be charged.

  In the communication control system 1 according to the present embodiment, the HSS 30 determines whether or not the communication terminal 10 that has received the incoming call notification is a WCDMA non-compliant terminal 10a stored in advance. Specifically, when an incoming voice call (incoming notification) to the communication terminal 10 transmitted from the ASN 40 is received by the communication unit 301, the call processing control unit 303 b refers to the subscriber DB 304, and the user of the communication terminal 10. It is determined whether the identifier exists in the subscriber DB 304, that is, whether the EPS-only information of the communication terminal 10 is stored in the subscriber DB 304.

  When the EPS-only information of the communication terminal 10 is stored in the subscriber DB 304, that is, when it is determined that the communication terminal 10 is the WCDMA non-compliant terminal 10a, the call processing control unit 303b performs the subscriber DB 304. The CA of the LTE network, which is information indicating the position related to the LTE network, is acquired from the MME 12 regardless of whether or not the mobile station has 3G network location information. Therefore, even if the subscriber DB 304 has the location information of the 3G network, the information (CA of the MSC 22) indicating the location of the 3G network where the communication terminal 10 cannot be located is the location of the communication terminal 10. It is prevented from being acquired as information to be shown. Thereby, when voice communication is performed between the communication terminal 10 and the fixed telephone, the distance from the communication network in which the communication terminal 10 is actually located to the fixed telephone can be appropriately specified. Accordingly, an appropriate voice communication fee can be charged.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the embodiment described above, even if the subscriber DB 304 has 3G network location information by referring to the EPS-only information of the communication terminal 10 stored in the subscriber DB 304 of the HSS 30, the communication terminal It has been described as preventing information (CA of MSC 22) indicating a position related to a 3G network where 10 cannot be present as information indicating the position of communication terminal 10 from being acquired. The method for preventing the acquisition of information indicating the position of the communication network in which the communication terminal 10 cannot be located is not limited to the above. For example, instead of storing the EPS-only information, the location information of the 3G network at the time of location registration (MSC information) may be deleted. By deleting the location information of the 3G network, it is possible to prevent a situation where a CA of the 3G network where the communication terminal 10 cannot be located at the time of an incoming call is acquired. In this case, the subscriber DB 304 is a location information storage unit that stores MSC information that is location information related to the 3G network of the communication terminal 10 and MME information that is location information related to the LTE network. The call processing control unit 302b is a visiting area information deleting unit that deletes the visiting area information of the 3G network. Hereinafter, the process of deleting the MSC information in the subscriber DB 304 of the HSS 30 will be described with reference to FIG. FIG. 13 is a flowchart illustrating HSS location registration processing according to a modification.

  As shown in FIG. 13, when the location registration signal from the MME 12 is received by the communication unit 301 (step S31), the parameter of the location registration signal is analyzed by the signal analysis unit 302a (step S32). By this analysis, it is determined whether or not EPS-only information is set in the location registration signal (step S33). The processing of S31 to S33 is the same as the processing of S11 to S13 shown in FIG.

  If EPS-only information is set in S13, the call processing control unit 302b determines whether or not MSC information is stored as location information in the subscriber DB 304 (step S34). When the MSC information is stored in S34, the MSC information is deleted by the call processing control unit 302b (step S35), and finally, various call processes are performed by the call processing control unit 302b (step S36). . In this way, the MSC information that is the location information of the 3G network is deleted in the location registration process, thereby preventing the CA of the MSC 22 from being acquired in the incoming call process.

  Although the first communication network has been described as a 3G network and the second communication network as an LTE network, the present invention is not limited to this. It may be a net. Further, each of the first communication network and the second communication network may be two or more communication networks.

DESCRIPTION OF SYMBOLS 1 ... Communication control system, 10 ... Communication terminal, 10a ... WCDMA non-corresponding terminal, 12 ... MME, 30 ... HSS, 121 ... Communication part, 122 ... Determination part, 123 ... Call processing control part, 124 ... Signal construction part, 301 DESCRIPTION OF SYMBOLS Communication unit 302 Location registration processing unit 302a Signal analysis unit 302b Call processing control unit 303 Call reception processing unit 303a Signal analysis unit 303b Call processing control unit 304 Subscriber DB

Claims (4)

  1. Terminal information receiving means for receiving a location registration request including information indicating whether or not the communication terminal is a communication-impossible terminal that does not have a function of performing communication in the first communication network;
    Based on the location registration request received by the terminal information receiving means, storage means for storing information indicating whether or not the communication terminal for each user is the non-communication terminal;
    An incoming call reception means for receiving an incoming call notification to the communication terminal;
    An incoming call determination unit for determining whether or not the communication terminal that has received the incoming call notification by the incoming call reception unit is a communication disabled terminal stored in the storage unit;
    When the incoming call determination means determines that the communication terminal is the non-communication terminal, information indicating a position related to a second communication network that is a communication network different from the first communication network is acquired. And a communication control device.
  2. The location information storage means for storing the location information related to the first communication network and the location information related to the second communication network of the communication terminal;
    Terminal information receiving means for receiving a location registration request including information indicating whether or not the communication terminal is a non-communication terminal that does not have a function of performing communication in the first communication network;
    When the location registration request received by the terminal information receiving means includes information indicating that the communication terminal is the non-communication terminal, the first communication network stored in the in-zone information storage means A communication control apparatus comprising: area information deletion means for deleting area information related to the area.
  3. A communication control system comprising a first communication control device and a second communication control device,
    The first communication control device includes:
    Receiving means for receiving a location registration request from a communication terminal;
    Determining means for determining whether or not the communication terminal is a non-communication terminal that does not have a function of performing communication in the first communication network based on the location registration request received by the reception means;
    A transmission unit that transmits a location registration request including information indicating a result of the determination when the determination unit determines that the communication terminal is the non-communication terminal;
    The second communication control device includes:
    Terminal information receiving means for receiving a location registration request transmitted from the transmitting means of the first communication control device;
    Based on the location registration request received by the terminal information receiving means, storage means for storing information indicating whether or not the communication terminal for each user is the non-communication terminal;
    An incoming call reception means for receiving an incoming call notification to the communication terminal;
    An incoming call determination unit for determining whether or not the communication terminal that has received the incoming call notification by the incoming call reception unit is a communication disabled terminal stored in the storage unit;
    When the incoming call determination means determines that the communication terminal is the non-communication terminal, information indicating a position related to a second communication network that is a communication network different from the first communication network is acquired. And a communication control system.
  4. A receiving step of receiving a location registration request from the communication terminal;
    A determination step of determining whether or not the communication terminal is a non-communication terminal that does not have a function of performing communication in the first communication network based on the location registration request received in the reception step;
    In the determination step, when it is determined that the communication terminal is the non-communication terminal, a transmission step of transmitting a location registration request including information indicating a result of the determination;
    A terminal information receiving step for receiving the location registration request transmitted in the transmitting step;
    Based on the location registration request received in the terminal information receiving step, a storage step of storing information indicating whether or not the communication terminal for each user is the non-communication terminal;
    An incoming call receiving step for receiving an incoming call notification to the communication terminal;
    An incoming call determination step for determining whether or not the communication terminal that has received the incoming call notification in the incoming call reception step is a communication disabled terminal stored in the storage step;
    When it is determined in the incoming call determination step that the communication terminal is the non-communication terminal, information indicating a position related to a second communication network that is a communication network different from the first communication network is acquired. A communication control method including an acquisition step.
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