JPWO2018235708A1 - User equipment and mobility management node - Google Patents

Abstract

The user device is connected to a mobility management node in a communication network, and has a generation unit that generates a message used for location registration in the communication network, and a transmission unit that transmits the message to the mobility management node, In the message, information indicating whether or not the service provided by the IP multimedia subsystem provided by the communication network is available to the user device and information indicating whether or not the user device is available for each type of the service are input. To do.

Description

  The present invention relates to a user equipment and mobility management node in a communication system.

  In 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) is used in order to realize a larger system capacity, a higher data transmission speed, and a lower delay in a wireless section. A so-called wireless communication system (hereinafter, the wireless communication system is referred to as “5G”) is under study.

  In a conventional 3G or LTE (Long Term Evolution) network, the user equipment performs MME via E-UTRAN (Evolved Universal Terrestrial Radio Network) in location registration when the user equipment and the network establish a connection. (Mobile Management Entity) and HSS (Home Subscriber Server) and NAS (Non-Access Stratum) control signals are exchanged (for example, Non-Patent Document 1). On the other hand, in 5G, a new system architecture is being studied, and AMF (Access and Mobility Management function) and UDM (Uniform Data Management) and NAS control signals are used in initial access when a user device and a network establish a connection. Are exchanged (for example, Non-Patent Document 2).

  In addition, the user equipment uses an IMS (IP Multimedia Subsystem) service provided by a telecommunications carrier via UPF (User Plane Function) in 5G, PDN (Public Data Network) Gateway in 3G or LTE. To do.

3GPP TS 23.401 V15.0.0 (2017-06) 3GPP TS 23.501 V1.0.0 (2017-06)

  In 3G PS calls and LTE, an IMS service is used to provide a voice service on a packet network. In addition to the voice service, the IMS service provides various services such as video, SMS (Short Message Service), MMS (Multimedia Messaging Service), IM (Instant Messaging), real-time chat, RCS (Rich Communication), and the like. These services have various technical requirements (Technical Requirements) such as requiring QoS control, authentication function, billing function, and high security due to the difference in characteristics, and IMS can support them. Is designed. The supportability of these is related to the amount of traffic in the network and largely depends on the difference in the arrangement of the service menus of the operators. Therefore, the support of various IMS functions is mainly operator matter.

  Here, since the user device notifies the availability of only the voice service among the IMS services at the time of location registration, the availability of the IMS service in the user device and which service other than the voice service of the IMS service is available. It is possible that the states of the user device and the network cannot be matched. It is conceivable that this case similarly occurs in NR.

  The present invention has been made in view of the above points, and an object of the present invention is to limit the establishment of a connection between a user apparatus and an IMS network when necessary, and prevent the generation of unnecessary service requests.

  According to the disclosed technique, a user apparatus is connected to a mobility management node in a communication network, and a generation unit that generates a message used for location registration in the communication network, and a transmission that transmits the message to the mobility management node. The information indicating whether the service by the IP multimedia subsystem provided by the communication network is available to the user device, and whether the message is available to the user device for each type of service. Enter the information indicating whether or not.

  According to the disclosed technique, a technique is provided which limits the establishment of a connection between a user apparatus and an IMS network only when necessary and prevents the generation of an unnecessary service request.

It is a figure which shows the example of a network architecture of 5G. It is a figure which shows the example of a network architecture of 5G. It is a figure which shows the example of a network architecture of 5G. It is a figure which shows the example of the network architecture of 3G or LTE. It is a figure which shows the example of the network architecture of 3G or LTE. It is a figure which shows the example of the network architecture of 3G or LTE. It is a figure which shows the example (1) of the sequence which uses an IMS service. It is a figure which shows the example (2) of the sequence which uses an IMS service. It is a figure which shows the example (1) of the sequence which uses an IMS service at the time of roaming. It is a figure which shows the example (2) of the sequence which uses an IMS service at the time of roaming. It is a figure which shows the example (3) of the sequence which uses an IMS service at the time of roaming. It is a figure which shows the example of the sequence regarding registration or utilization of an IMS service. It is a figure which shows the example of the sequence which uses IMS Video. It is a figure which shows the example of the sequence of the location registration in embodiment of this invention. It is a figure which shows the example of the capability notification of the IMS service in embodiment of this invention. It is a figure showing an example of functional composition of mobility management node 100 in an embodiment of the invention. It is a figure which shows an example of a functional structure of the user apparatus 200 in embodiment of this invention. It is a figure which shows an example of the hardware constitutions of the movement management node 100 and the user apparatus 200 in embodiment of this invention.

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

  In the operation of the communication system of the present embodiment, existing technology is used as appropriate. The existing technology is, for example, existing LTE, but is not limited to existing LTE. Unless otherwise specified, “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced or later systems (eg, 5G).

  In the embodiments described below, AMF or MME is called a mobility management node and UE is called a user apparatus.

  In the following, an example of the entire system configuration, initial access and use of the IMS service will be described as a basic example, and then an example in the embodiment of the present invention will be described. The examples are based on the basic example. However, the embodiment may be based on a system other than the basic example.

(Basic example)
<Overall system configuration>
FIG. 1 is a diagram illustrating an example of a 5G network architecture. Each element shown in FIG. 1 indicates an NF (Network Function). FIG. 1A shows a network architecture in a non-roaming environment. As shown in FIG. 1A, a UE (User Entity), that is, a user apparatus 200 is connected to an AMF, which is a mobility management node 100. The AMF 100 is also connected to the UDM. Further, the UE is connected to a DN (Data Network) including an IMS service via a RAN (Radio Access Network) or AN (Access Network) and an UPF (User Plane Function). The DN includes the IMS. As other NFs, there are AUSFs (Authentication Server Functions), SMFs (Session Management Functions), PCFs (Policy Control Functions), and AFs (Application Functions). In a non-roaming environment, the network to which the UE connects is a Serving PLMN (Public Land Mobile Network).

  FIG. 1B illustrates a network architecture when a UE and a DN are included in a VPLMN (Visited Public Land Mobile Network) in a roaming environment. As shown in FIG. 1B, VPLMN includes AMF, SMF, V-PCF (PCF in the VPLMN), AF, RAN or AN, UPF and DN. On the other hand, HPLMN (Home Public Land Mobile Network) includes UDM, AUSF, and H-PCF (PCF in the HPLMN). In the roaming environment, the network to which the UE connects, that is, the VPLMN becomes the Serving PLMN.

  FIG. 1C shows a network architecture when a UE is included in a VPLMN and a DN is included in an HPLMN in a roaming environment. As shown in FIG. 1C, VPLMN includes AMF, V-PCF, V-SMS, RAN or AN, and UPF. On the other hand, HPLMN includes H-SMF (SMF in the HPLMN), AF, UPF, and DN in addition to UDM, AUSF, and H-PCF.

  That is, in the non-roaming environment, the AMF obtains the subscriber profile from the UDM existing in the same PLMN via the NAS control signal, but in the roaming environment, the AMF existing in the VPLMN changes from the UDM existing in the HPLMN. Obtain the subscriber profile via the NAS control signal.

  FIG. 2 is a diagram illustrating an example of a 3G or LTE network architecture. FIG. 2A shows a network architecture in a non-roaming environment. As shown in FIG. 2A, the UE, that is, the user apparatus 200 is connected to an MME (Mobile Management Entity), that is, the mobility management node 100. MME corresponds to AMF in 5G. Further, the MME is connected to the HSS (Home Subscriber Server). HSS corresponds to UDM in 5G. In addition, the UE refers to an Operator's IP (Internet Protocol) Services including an IMS service, that is, an IP service provided by a telecommunications carrier, an E-UTRAN (Evolved Universal Terrestrial Radio Network, PD, and Serve), and a Serve. Data Network) Gateway is connected. The IP service includes IMS. In addition, as other NFs, there are a SGSN (Serving GPRS Support Node) and a PCRF (Policy and Charging Rules Function) to which UTRAN or GERAN (GSM (registered trademark) EDGE Radio Access Network) is connected. The Serving Gateway corresponds to 5G SMF, and the PDN Gateway corresponds to 5G UPF.

  FIG. 2B shows a network architecture when a UE includes a VPLMN and an Operator's IP Services is included in an HPLMN in a roaming environment. As shown in FIG. 2B, the VPLMN includes MME, SGSN, E-UTRAN, UTRAN, GERAN, and Serving Gateway. On the other hand, HPLMN includes HSS, PDN Gateway, PCRF, and Operator's IP Services.

  FIG. 2C shows a network architecture when a UE and an Operator's IP Services are included in a VPLMN in a roaming environment. As shown in FIG. 2C, the VPLMN includes MME, SGSN, E-UTRAN, UTRAN, GERAN, Serving Gateway, PDN Gateway and V-PCRF (PCRF in the VPLMN). On the other hand, HPLMN includes HSS and H-PCRF (PCRF in the HPLMN).

  That is, similar to the 5G network architecture shown in FIG. 1, in the non-roaming environment, the MME obtains the subscriber profile from the HSS existing in the same PLMN via the NAS control signal, but in the roaming environment, The MME existing in the VPLMN acquires the subscriber profile from the HSS existing in the HPLMN via the NAS control signal.

  FIG. 3 is a diagram showing an example (1) of a sequence using the IMS service. As shown in FIG. 3, the sequence is a sequence that uses the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. As described in FIG. 2, during roaming, the UE 200, the MME 100, and the SGW (Serving Gateway) are included in the VPLMN, and the HSS, the PGW (PDN Gateway), and the IMS are included in the HPLMN.

  In step S11, the UE 200 transmits a NAS message related to location registration to the MME 100. Subsequently, the MME 100 transmits a NAS message related to location registration and authentication to the HSS (S12). Subsequently, the HSS transmits a NAS message related to the approval / provision of the subscriber profile to the MME 100 (S13). Then, MME100 transmits the NAS message which concerns on a position response and permission to UE200 (S14). The location registration of the UE 200 is completed in steps S11 to S14.

  In step S14, there is a mechanism for notifying the availability of the voice service (hereinafter, referred to as "IMS Voice") in the IMS service. In 3G PS calls and LTE, IMS is used to provide voice services on the packet network. In addition to voice, the IMS can provide video, SMS, MMS, IM, real-time chat, RCS (Rich Communication Suite), and the like. In order to provide a voice service in a packet network, it is necessary to perform QoS (Quality of Service) control or management of resources necessary for a wireless network and a packet network. Therefore, not all 3G PS calls or LTE can provide the voice service by IMS. Therefore, by the notification mechanism, the MME 100 notifies the UE 200 whether or not the IMS Voice of the IMS network can be provided at the time of the location registration of the UE 200 (including periodic location registration and change of location registration).

  In step S15, the UE 200 makes a packet session connection request and response to the IMS network between the MME 100 and the PGW via the SGW. Then, the UE 200 registers the IMS service in the IMS network and uses the service (S16).

  In steps S15 and S16, the connection to the IMS is made independently of the presence / absence of the IMS Voice capability of the IMS network at the discretion of the UE 200. Further, in step S16, the UE 200 performs voice call and incoming call permission on the IMS when it is notified in step S14 that the IMS network has the IMS Voice capability. Note that other services of IMS are performed independently of the notification of the IMS Voice capability.

FIG. 4 is a diagram showing an example (2) of a sequence using the IMS service. Similar to FIG. 3, FIG. 4 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Steps S21 to S26 are the same as steps S11 to S16.
In step S21, the UE 200 can notify the MME 100 of the presence or absence of the IMS Voice capability on the UE 200 side, that is, the availability of the IMS Voice and the availability of confirmation of the incoming call trigger. It is not possible to notify the availability of IMS according to the above. In step S24, the availability of the IMS Voice can be notified, but it cannot be notified whether the IMS itself or the IMS service capability other than Voice is available.

  That is, in the location registration phase, the UE 200 and the MME 100 are short of notifications for cooperating with each other about the availability of the IMS of each of the UE 200 and the IMS and which IMS service other than the IMS Voice is available. Therefore, the states cannot be matched between the respective NFs.

  FIG. 5 is a diagram showing an example (1) of a sequence for using the IMS service during roaming. Similar to FIG. 3, FIG. 5 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Further, since FIG. 5 shows the operation at the time of roaming, the UE 200, the MME 100 and the SGW exist in the VPLMN, and the HSS, PGW and IMS exist in the HPLMN. Steps S31 to S36 are the same as steps S11 to S16.

  In step S34, the MME 100 notifies the UE 200 that the IMS Voice of the IMS network has been started and is available. On the other hand, in the IMS, the IMS Voice is not started yet, and the IMS Voice transmission request is rejected. Therefore, in step S36, since the UE 200 receives the notification that the IMS Voice is available, the UE 200 makes a call with the IMS Voice. However, the IMS Voice is not yet started in the IMS, and the IMS rejects the IMS Voice transmission request from the UE 200.

  That is, when roaming, the VPLMN device and the HPLMN device may not be able to synchronize the use of the IMS service in the IMS network. In this case, although the UE 200 receives the notification that the IMS Voice of the IMS network is available, the IMS Voice transmission request is rejected and a call loss occurs.

  FIG. 6 is a diagram showing an example (2) of a sequence of using the IMS service during roaming. Similar to FIG. 3, FIG. 6 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Further, since FIG. 6 shows the operation at the time of roaming, the UE 200, the MME 100, and the SGW exist in the VPLMN, and the HSS, PGW, and IMS exist in the HPLMN. Steps S41 to S46 are the same as steps S11 to S16.

  In step S44, the MME 100 notifies the UE 200 that the IMS Voice of the IMS network has not been started and cannot be used. On the other hand, the IMS has the IMS Voice started and is in a usable state. Therefore, in step S36, the IMS makes an IMS Voice incoming call request to the UE 200. However, since the UE 200 receives the notification that the IMS Voice of the IMS network is unavailable, the UE 200 rejects the IMS Voice incoming request.

  That is, similar to FIG. 5, when roaming, the VPLMN device and the HPLMN device may not be able to synchronize the start of use of the IMS service of the IMS network. In this case, since the UE 200 has received the notification that the IMS Voice of the IMS network is unavailable, the UE 200 rejects the IMS Voice incoming call request and a call loss occurs.

  FIG. 7: is a figure which shows the example (3) of the sequence which uses an IMS service at the time of roaming. Similar to FIG. 3, FIG. 6 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Further, since FIG. 7 shows the operation at the time of roaming, the UE 200, the MME 100 and the SGW exist in the VPLMN, and the HSS, PGW and IMS exist in the HPLMN. Steps S51 to S56 are the same as steps S11 to S16.

  In step S56, the MME 100 existing in the VPLMN cannot notify the UE 200 of rejection or the like other than the IMS Voice, and cannot notify the availability of other IMS services. Therefore, the VPLMN does not agree to use the unfair network. There are cases.

  That is, when the VPLMN carrier has agreed only to settle the usage fee by a network utilization means other than IMS during roaming, the UE 200 and the HPLMN IMS are restricted to the network utilization means set by the VPLMN. There is a problem that communication can be started without it.

  For example, even if only the agreement to settle the usage fee of the SMS using the conventional method (via the common line signal) is made, the SMS using the IMS is transmitted and received only by the agreement between the UE 200 and the IMS of the HPLMN. It is possible that the VPLMN has no means for preventing the transmission / reception based on the protocol, and the usage fee cannot be settled.

  FIG. 8 is a diagram showing an example of a sequence relating to registration or use of the IMS service. Similar to FIG. 3, FIG. 8 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Steps S61 to S65 are the same as steps S11 to S15.

  In step S66, the UE 200 requests the IMS to register the IMS service. The IMS responds to the registration request independently of the IMS capability on the UE 200 side. Therefore, the UE 200 also accepts a registration request for an IMS service that does not support, and the UE 200 reserves a resource for an IMS service that does not support, so that unnecessary core resources or radio resources may be consumed.

In step S67, the UE 200 requests the IMS to use the IMS service. If some IMS services cannot be used, even if other IMS services are registered, only some of the IMS services cannot be used. The UE 200 finds that the part of the service cannot be used when the request is rejected after requesting the part of the service, and the radio resource may be consumed. Further, since the request for using the IMS service is rejected, the UE 200 may repeatedly execute steps S66 and S67, and thus further wireless resources may be consumed.

  That is, if the packet connection between the UE 200 and the PGW is possible, but the service is invalid due to the fact that each service of the IMS is not contracted, etc., the UE 200 side or the IMS network until the service is registered or requested. The validity or invalidity of the service cannot be determined. Therefore, radio resources related to the packet connection between the UE 200 and the PGW may be consumed.

  FIG. 9 is a diagram showing an example of a sequence using IMS Video. Similar to FIG. 3, FIG. 9 shows a sequence of using the location registration of the UE 200 and the IMS service in the network architecture in 3G or LTE. Steps S71 to S76 are the same as steps S11 to S16.

  In step S74, the MME 100 notifies the UE 200 that the IMS Voice of the IMS network is unavailable.

  In step S76, the availability of the IMS network for the video service (hereinafter, referred to as “IMS Video”) in the IMS service that does not include voice is unknown, and thus the use of the IMS Video of the UE 200 is hindered.

  That is, since the detailed availability of the IMS service is not notified to the UE 200 side, the UE 200 cannot determine which IMS service is available.

(Example)
Examples will be described below. It should be noted that in the following embodiments, an improved portion with respect to the technique of the basic example described above will be described. Therefore, unless otherwise stated, the basic examples apply.

  FIG. 10 is a diagram showing an example of a position registration sequence according to the embodiment of the present invention. As shown in FIG. 10, each NF corresponds to a 5G device as well as 3G or LTE. MME corresponds to AMF, SGW corresponds to SMF, HSS corresponds to UDM, and PGW corresponds to UPF.

  In step S101, the UE 200 transmits a NAS message related to location registration to the MME / AMF100. Subsequently, the MME / AMF 100 transmits a NAS message related to location registration and authentication to the HSS / UDM (S102). Subsequently, the HSS / UDM transmits a NAS message related to the provision of the approval / subscriber profile to the MME / AMF 100 (S103). Then, MME / AMF100 transmits the NAS message which concerns a position response and permission to UE200 (S104). The location registration of the UE 200 is completed in steps S101 to S104.

  In step S101, the UE 200 notifies the MME / AMF 100 of a list of available IMS services including the presence / absence of IMS capability on the UE 200 side and IMS Voice via a NAS message related to location registration. In addition, in step S104, the MME / AMF 100 notifies the UE 200 of a list of available IMS services including the presence or absence of the IMS capability of the IMS network and the IMS Voice via the NAS message related to the location response and the permission.

  FIG. 11 is a diagram showing an example of the capability notification of the IMS service according to the embodiment of the present invention. As shown in FIG. 11, in the conventional “IMS supported indication”, which is the capability notification of the IMS service, “Supported / Not supported” of “IMS voice over PS Session Supported Indication”, which is a notification related to IMS Voice. By setting or, it is notified that it is available or not available.

  In the “IMS supported indication” according to the embodiment of the present invention, the availability of the IMS itself is set to “Supported / Not Supported” by setting “IMS supported indication” to “Supported / Not Supported”. To notify. In addition, by setting any of "Supported / Not Supported" for "IMS voice over PS Session Supported Indication" which is a notification related to IMS Voice, it is notified that it is available or unavailable. In addition, by setting either "Supported / Not Supported" for "IMS Video over PS Session Supported Indication" that is a notification related to IMS Video, it is notified that it is available or unavailable. Also, by setting either "Supported / Not Supported" for "SMS over IP Supported Indication", which is a notification related to SMS by the IMS, it is notified that it is available or unavailable. Further, by setting either "Supported / Not Supported" for "RCS Services Supported Indication" which is a notification related to RCS by IMS, it is notified that it is available or unavailable. Further, by setting either "Supported / Not Supported" for "Other IMS Services Supported Indication", which is a notification related to other services by the IMS, it is notified that the service is available or unavailable.

  The “IMS supported indication” in the embodiment of the present invention may be notified from the UE 200 to the MME / AMF, that is, the mobility management node 100, or may be notified from the MME / AMF, that is, the mobility management node 100 to the UE 200. Good.

  Returning to FIG. The list of available IMS services including the presence / absence of IMS capability on the UE 200 side and IMS Voice in step S101, that is, the notification of “IMS supported indication” shown in FIG. 11 is performed based on the IMS capability of the UE 200. . For example, when IMS Voice, IMS Video, and SMS are available, “IMS supported indication” indicating availability of IMS itself is “Supported”, and “IMS voice over PS Suspended or“ Independent ”is also available. "Supported" for "IMS Video over PS Session Supported Indication", "Supported" for "SMS over IP Supported Indication", and "Not supported for RCS Services Supported" for "SMS not supported" In addition to set the "Not Supported" because it does not use for "Other IMS Services Supported Indication".

  Further, in step S101, the UE 200 may set the list of IMS services according to the RAT (Radio Access Technology) to be connected. For example, when the RAT is 3G or LTE, the UE 200 may be set to use an IMS service that requires a low data transfer rate or can tolerate a large delay. Further, for example, when the RAT is 5G, the UE 200 may be set to use an IMS service that requires a high data transfer rate or can tolerate only a small delay. That is, the user device 200 may set the list of IMS services according to the characteristics such as the data transfer rate and the delay of the RAT.

  In step S104, the list of available IMS services including the presence / absence of IMS capability of the IMS network and the IMS Voice, that is, the notification of "IMS supported indication" shown in FIG. 11 indicates the IMS capability of the IMS network of the MME / AMF100. In addition to the information related to the above, it is performed based on the policy of the telecommunications carrier, the tie-up situation between telecommunications carriers related to roaming, and the contract.

  For example, when the IMS network does not support SMS, the “SMS over IP Supported Indication” is set to “Not Supported”.

  Further, for example, when the IMS network supports RCS and the policy of the communication carrier is to cause the user apparatus 200 to use RCS, “RCS Services Supported Indication” is set to “Supported”.

  In addition, for example, in a contract between carriers related to roaming, if the IMS device is not allowed to be used by the user device 200 in roaming of the target carrier, “IMS supported” indicating whether or not the IMS itself can be used. “Indication” may be set to “Not Supported” and all of the list may be set to “Not Supported”. As a result, the mobility management node 100 can control the availability of the IMS service based on the contract between the communication carriers by the NAS message, and the roaming service can be improved.

  In step S105, the UE 200 sets the PGW / UPF via the MME / AMF 100 and SGW / SMF based on the IMS contract status and the IMS service list of the IMS network acquired in step S104 and the IMS capability of the UE 200. In between, a packet session connection request and response to the IMS network are made.

  In step S105, the user apparatus 200 determines whether to execute a packet session connection request to the IMS network based on the list of IMS services of the IMS network acquired in step S104. That is, the packet session connection request for the IMS service not provided by the IMS network is not executed by the user apparatus 200, and the packet session connection request for the IMS service provided by the IMS network is executed by the user apparatus 200. Therefore, the user equipment 200 can prevent the generation of the packet session connection request for the invalid IMS service.

  In step S106, the UE 200 performs registration and use of the IMS service by the IMS network.

  Note that, for example, in step S105, the MME / AMF 100 may notify the IMS network of the IMS capability of the UE 200 via the SGW / SMF and the PGW / UPF.

  According to the above-described embodiment, the MME / AMF, that is, the mobility management node, in the wireless communication system having the mobility management node and the user equipment, acquires the availability of the IMS service from the user equipment at the time of location registration, and the IMS from the mobility management node. By notifying the user device whether or not various services provided by the service can be provided, it is possible to prevent the state inconsistency between the user device and the IMS service. That is, the mobility management node causes the user equipment to grasp the IMS services available in the IMS network, and limits the establishment of the connection between the user equipment and the IMS network only when necessary, and prevents the generation of unnecessary service requests. be able to.

(Device configuration)
Next, a functional configuration example of the mobility management node 100 and the user device 200 that execute the processes and operations described above will be described. The mobility management node 100 and the user device 200 each include at least the functionality to implement the embodiment. However, the mobility management node 100 and the user device 200 may each have some of the functions in the embodiment.

<Mobility management node 100>
FIG. 12 is a diagram showing an example of the functional configuration of the mobility management node 100. As shown in FIG. 12, the mobility management node 100 includes a transmission unit 110, a reception unit 120, a setting information management unit 130, and an IMS service control unit 140. The functional configuration shown in FIG. 12 is an example. As long as the operation according to the present embodiment can be performed, the function classification and the names of the function units may be any names.

  The transmission unit 110 has a function of generating a NAS signal to be transmitted to the user device 200 side and transmitting the signal. The receiving unit 120 has a function of receiving the NAS signal transmitted from the user device 200 and acquiring information from the received signal. Further, the transmission unit 110 has a function of transmitting a NAS signal to HSS / UDM, SGW / SMF, or the like, for example.

  The setting information management unit 130 stores preset setting information and various setting information to be transmitted to the user device 200. The contents of the setting information are, for example, information regarding location registration, information regarding the IMS service capability of the IMS network, and a policy regarding the IMS service of the communication carrier.

  The IMS service control unit 140 has a function of controlling the notification information regarding the IMS service, which has been described in the basic example and the example. The IMS service control unit 140 acquires a list of available IMS services on the UE 200 side from the UE 200 via the receiving unit 120, and notifies the UE 200 of the list of available IMS services on the IMS network via the transmitting unit 110. To do.

<User device 200>
FIG. 13 is a diagram showing an example of a functional configuration of the user device 200. As shown in FIG. 12, the user device 200 includes a transmission unit 210, a reception unit 220, a setting information management unit 230, and an initial access control unit 240. The functional configuration shown in FIG. 13 is an example. As long as the operation according to the present embodiment can be performed, the function classification and the names of the function units may be any names.

  The transmitting unit 210 creates a NAS signal to be transmitted to the mobility management node 100 and transmits the signal. The receiving unit 220 has a function of receiving various NAS signals and acquiring information from the received signals. The receiving unit 220 also has a function of receiving the NAS signal transmitted from the mobility management node 100.

  The setting information management unit 230 stores various setting information acquired by the receiving unit 220 from the mobility management node 100. The setting information management unit 230 also stores preset setting information. The content of the setting information is, for example, information on location registration, information on IMS service capability on the UE 200 side, and the like.

  The initial access control unit 240 performs the control related to the initial access including the notification regarding the location registration and the IMS service in the user device 200 described in the basic example and the example. The functional unit related to signal transmission in the initial access control unit 240 may be included in the transmission unit 210, and the functional unit related to signal reception in the initial access control unit 240 may be included in the reception unit 220.

<Hardware configuration>
The functional configuration diagrams (FIGS. 12 and 13) used in the above description of the embodiment of the present invention show blocks of functional units. These functional blocks (components) are realized by an arbitrary combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device in which a plurality of elements are physically and / or logically combined, or directly and physically by two or more devices physically and / or logically separated. It may be realized by these plural devices by connecting indirectly (for example, wired and / or wireless). Further, for example, both the mobility management node 100 and the user device 200 according to the embodiment of the present invention may function as a computer that performs the processing according to the present embodiment.
FIG. 14 is a diagram showing an example of a hardware configuration of a communication device which is the mobility management node 100 or the user device 200 according to the embodiment of the present invention. The mobility management node 100 and the user device 200 described above are each physically a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. It may be configured.

  In the following description, the word “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the mobility management node 100 and the user device 200 may be configured to include one or a plurality of the devices 1001 to 1006 as illustrated in FIG. 14, or may include some devices. It may be configured without.

  Each function in the mobility management node 100 and the user device 200 causes a predetermined software (program) to be loaded on hardware such as the processor 1001, the storage device 1002, etc., so that the processor 1001 performs an arithmetic operation and communication by the communication device 1004, It is realized by controlling reading and / or writing of data in the storage device 1002 and the auxiliary storage device 1003.

  The processor 1001 operates an operating system to control the entire computer, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

  Further, the processor 1001 reads a program (program code), software module, or data from the auxiliary storage device 1003 and / or the communication device 1004 to the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least part of the operations described in the above-described embodiments is used. For example, the transmission unit 110, the reception unit 120, the setting information management unit 130, and the IMS service control unit 140 of the mobility management node 100 illustrated in FIG. 12 are stored in the storage device 1002 and are realized by a control program that runs on the processor 1001. May be. In addition, for example, the transmission unit 210, the reception unit 220, the setting information management unit 230, and the initial access control unit 240 of the user device 200 illustrated in FIG. 13 are stored in the storage device 1002, and a control program that operates in the processor 1001. May be realized by 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. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via an electric communication line.

  The storage device 1002 is a computer-readable recording medium, and is, for example, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), or at least one RAM (Random Accessory). It may be configured. The storage device 1002 may be called a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store an executable program (program code), a software module, or the like for executing the processing according to the embodiment of the present invention.

  The auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, or a Blu). -Ray (registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage medium described above may be, for example, a database including the storage device 1002 and / or the auxiliary storage device 1003, a server, or any other suitable medium.

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission unit 110 and the reception unit 120 of the mobility management node 100 may be realized by the communication device 1004. Further, the transmission unit 210 and the reception unit 220 of the user device 200 may be realized by the communication device 1004.

  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 performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

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

  Further, the mobility management node 100 and the user device 200 are a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Dedicated Arrangement), a PLD (Programmable Logical Device, FPGA), and the like. The hardware may be included, and the hardware may implement some or all of the functional blocks. For example, processor 1001 may be implemented with at least one of these hardware.

(Summary of Embodiments)
As described above, according to the embodiment of the present invention, a user device connected to a mobility management node in a communication network, and a generation unit that generates a message used for location registration in the communication network. A message for transmitting the message to the mobility management node, the message including information indicating whether or not the service by the IP multimedia subsystem provided by the communication network is available to the user device, and There is provided a user device for inputting information indicating whether the user device can be used for each service type.

  With the above configuration, by notifying the mobile management node of the IMS service type that can be used by the user equipment, the establishment of the connection between the user equipment and the IMS network is limited to the case where it is necessary and the unnecessary service request is generated. Can be prevented.

  The user equipment further includes a receiving unit for receiving a location registration response message transmitted from the mobility management node, wherein the communication network includes an IP multimedia subsystem based on the location registration response message. A packet session connection request may be transmitted to the mobility management node based on information indicating whether a service can be provided and information indicating whether the communication network can provide each type of service. With this configuration, the user apparatus can acquire the type of service provided by the IMS network, and the connection between the user apparatus and the IMS network can be established only when it is necessary to prevent the generation of unnecessary service requests. can do.

  If the information included in the location registration response message indicating whether or not the communication network can be provided for each service type is NO, the transmission unit transmits the packet session connection request to the mobility management. It need not be sent to the node. With this configuration, it is possible to prevent unnecessary service requests from being generated.

  Based on the communication method of the communication network, information indicating whether or not the user device can be used for each type of service may be input to the message used for the location registration. With this configuration, the user equipment can select the IMS service according to the characteristics of the communication system of the communication network.

  According to an embodiment of the present invention, a mobility management node connected to a user device in a communication network, the generation unit generating a message used for a response to location registration in the communication network, and the message. For transmitting to the user device, information indicating whether or not the communication network can provide a service by the IP multimedia subsystem, and the communication network providing for each type of the service in the message. A mobility management node is provided for entering information indicating whether or not it is possible.

  With the above configuration, the user equipment can acquire the type of service provided by the IMS network, and the connection between the user equipment and the IMS network can be established only when necessary, and unnecessary service requests are generated. Can be prevented.

  Based on the operation policy of the communication network, information indicating whether or not the communication network can be provided for each type of service may be input to the message used for the location registration response. With this configuration, it is possible to set a service that can be used by the user device, in accordance with a policy of a telecommunications carrier operating the VPLMN or a contract with a telecommunications carrier of a roaming partner.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, and substitutions. Ah Although specific numerical values are used for the purpose of facilitating the understanding of the present invention, unless otherwise specified, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, items described in two or more items may be used in combination as necessary, and items described in one item may be different items. It may apply to the matters described in (as long as there is no conflict). The boundaries of the functional units or processing units in the functional block diagram do not always correspond to the boundaries of physical parts. The operation of a plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. Although the mobility management node 100 and the user device 200 have been described using functional block diagrams for convenience of processing description, such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor included in the mobility management node 100 according to the embodiment of the present invention and the software operated by the processor included in the user device 200 according to the embodiment of the present invention are respectively random access memory (RAM), flash memory, and read. It may be stored in a dedicated memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

  Each aspect / embodiment described in this specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), It may be applied to a system using Bluetooth (registered trademark) or other appropriate system and / or a next-generation system extended based on these.

  As long as there is no contradiction, the order of the processing procedure, sequence, flowchart, etc. of each aspect / embodiment described in this specification may be changed. For example, the methods described herein present elements of the various steps in a sample order, and are not limited to the specific order presented.

  The aspects / embodiments described in the present specification may be used alone, in combination, or may be switched according to execution.

  User equipment 200 can be a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

  The terms "determining" and "determining" as used herein may encompass a wide variety of actions. "Judgment" and "decision" are, for example, judgment, calculating, computing, processing, deriving, investigating, searching up (eg, table). , Searching in a database or another data structure), ascertaining ascertaining is regarded as “judging” or “determining”, and the like. Further, “determination” and “decision” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in a memory) may be regarded as “judgment” and “decision”. In addition, “judgment” and “decision” are to be regarded as “judgment” and “decision” when things such as resolving, selecting, hoosing, establishing, and comparing are performed. May be included. That is, the “judgment” and “decision” may include considering some action as “judgment” and “decision”.

  As used herein, the phrase "based on" does not mean "based only on," unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

  As long as the terms "include", "including", and variations thereof are used in the present specification or claims, these terms are the same as the term "comprising." It is intended to be comprehensive. Furthermore, the term “or” as used in the specification or claims is not intended to be an exclusive OR.

  Throughout this disclosure, where articles are added by translation, for example, a, an, and the in English, these articles are plural unless the context clearly indicates otherwise. Can be included.

  The presence / absence of IMS capability of the user equipment is an example of information indicating whether or not the service provided by the IP multimedia subsystem can be used by the user equipment. The list of IMS services available to the user device is an example of information indicating whether the user device is available for each service type. The presence or absence of the IMS capability of the IMS network is an example of information indicating whether the communication network can provide the service by the IP multimedia subsystem. The list of IMS services of the IMS network is an example of information indicating whether the communication network can provide each type of service. The IMS service control unit 140 or the initial access control unit 240 is an example of a generation unit.

  Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

  This international patent application claims its priority based on Japanese Patent Application No. 2017-120008 filed on June 19, 2017, and the entire content of Japanese Patent Application No. 2017-120008 is applied to the present application. Incorporate.

100 mobility management node 200 user device 110 transmission unit 120 reception unit 130 setting information management unit 140 IMS service control unit 200 user device 210 transmission unit 220 reception unit 230 setting information management unit 240 initial access control unit 1001 processor 1002 storage device 1003 auxiliary storage Device 1004 Communication device 1005 Input device 1006 Output device

Claims (6)

A user equipment connected to a mobility management node in a communication network,
A generation unit that generates a message used for location registration in the communication network,
A transmission unit for transmitting the message to the mobility management node,
The message includes information indicating whether or not the service provided by the IP multimedia subsystem provided by the communication network can be used by the user device and information indicating whether or not the user device can use the service for each type of the service. User equipment to enter. The user equipment further includes a reception unit that receives a location registration response message transmitted from the mobility management node,
Information indicating whether or not the communication network can provide a service by the IP multimedia subsystem and information indicating whether or not the communication network can be provided for each type of the service, which is included in the location registration response message. The user equipment according to claim 1, wherein the transmission unit transmits a packet session connection request to the mobility management node based on the above.   If the information included in the location registration response message indicating whether or not the communication network can be provided for each service type is NO, the transmission unit transmits the packet session connection request to the mobility management. The user equipment according to claim 2, which does not transmit to the node.   The user device according to claim 3, wherein information indicating whether or not the user device can be used for each type of the service is input to the message used for the location registration based on a communication method of the communication network. A mobility management node connected to a user equipment in a communication network,
A generation unit that generates a message used for a response of location registration to the communication network,
A transmission unit for transmitting the message to the user device,
A mobility management node that inputs, into the message, information indicating whether the communication network can provide a service by the IP multimedia subsystem and information indicating whether the communication network can provide the service for each type of the service.   The mobility management node according to claim 5, wherein, based on an operation policy of the communication network, information indicating whether or not the communication network can be provided for each type of service is input to a message used for a response to the location registration.

Images