1. A communication terminal comprising: means for transmitting an Attach Request message to a Mobility Management Entity (MME) during Attach procedure, the Attach Request message including first information indicating that the communication terminal supports Dual Connectivity with a Master base station providing Evolved Universal Terrestrial Radio Access (E-UTRA) and a Secondary base station providing radio communication scheme in 5G; and means for receiving an Attach Accept message from the MME during the Attach procedure, the Attach Accept message including second information indicating whether or not use of Dual Connectivity with the radio communication scheme in 5G is restricted, and for receiving a RRC Connection Reconfiguration message from the Master base station during a Secondary Node Addition procedure for operating the Dual Connectivity, the RRC Connection Reconfiguration message being received after receiving the Attach Accept message.

2. The communication terminal according to Claim 1, wherein the Dual Connectivity is E-UTRA-NR Dual Connectivity (EN-DC).

3. The communication terminal according to Claim 1 or 2, wherein the Master base station is connected to the Secondary base station via X2 interface.

4. The communication terminal according to any one of Claims 1 to 3, wherein the Secondary Node Addition procedure is a process of adding radio resources from the Secondary base station to the communication terminal.

5. The communication terminal according to any one of Claims 1 to 4, wherein the second information indicates whether or not the use of Dual Connectivity with the radio communication scheme in 5G is restricted by Evolved Packet System (EPS) network.

6. The communication terminal according to any one of Claims 1 to 5, wherein the means for transmitting is configured to reply to the Master base station with a RRC Connection Reconfiguration Complete message during the Secondary Node Addition procedure.

7. A Master base station providing Evolved Universal Terrestrial Radio Access (E-UTRA), the Master base station comprising: means for receiving an Attach Request message from a communication terminal, the Attach Request message including first information indicating that the communication terminal supports Dual Connectivity with the Master base station and a Secondary base station providing radio communication scheme in 5G; and means for transmitting the Attach Request message to a Mobility Management Entity (MME) during an Attach procedure, wherein the means for receiving is configured to receive, from the MME, an Attach Accept message including second information indicating whether or not use of Dual Connectivity with the radio communication scheme in 5G is restricted, and the means for transmitting is configured to transmit the Attach Accept message to the communication terminal during the Attach procedure, and to transmit a RRC Connection Reconfiguration message to the communication terminal during a Secondary Node Addition procedure for operating the Dual Connectivity, the RRC Connection Reconfiguration message being transmitted after transmitting the Attach Accept message.

8. The Master base station according to Claim 7, wherein the Dual Connectivity is E-UTRA-NR Dual Connectivity (EN-DC).

9. The Master base station according to Claim 7 or 8, wherein the means for receiving is configured to receive a RRC Connection Reconfiguration Complete message from the communication terminal during the Secondary Node Addition procedure.

10. The Master base station according to any one of Claims 7 to 9, wherein the second information indicates whether or not the use of Dual Connectivity with the radio communication scheme in 5G is restricted by Evolved Packet System (EPS) network.

11. A method of a communication terminal, the method comprising: transmitting an Attach Request message to a Mobility Management Entity (MME) during Attach procedure, the Attach Request message including first information indicating that the communication terminal supports Dual Connectivity with a Master base station providing Evolved Universal Terrestrial Radio Access (E-UTRA) and a Secondary base station providing radio communication scheme in 5G; receiving an Attach Accept message from the MME during the Attach procedure, the Attach Accept message including second information indicating whether or not use of Dual Connectivity with the radio communication scheme in 5G is restricted; and receiving a RRC Connection Reconfiguration message from the Master base station during a Secondary Node Addition procedure for operating the Dual Connectivity, the RRC Connection Reconfiguration message being received after receiving the Attach Accept message.

12. The method of the communication terminal according to Claim 11, wherein the second information indicates whether or not the use of Dual Connectivity with the radio communication scheme in 5G is restricted by Evolved Packet System (EPS) network. The present disclosure relates to a communication system, a control device, a communication terminal, a communication device, and a communication method, and more particularly to a communication system, a control device, a communication terminal, a communication device, and a communication method for communicating using a plurality of wireless bearers. Background technology [0002] In the 3GPP (3rd Generation Partnership Project), which is a standard for mobile communication systems, there is Dual Connectivity as a technology for the communication terminal UE (User Equipment) to execute wideband and low delay communication. Dual Connectivity means, for example, that the UE connects with the first base station MeNB (Master evolved NodeB) and the second base station SeNB (Secondary eNB) that perform LTE (Long Term Evolution) communication, and the UE also connects with SeNB in ​​addition to MeNB. It is a technology for communication. This makes it possible to improve the communication throughput. [0003] Non-Patent Document 1 describes, as a Dual Connectivity procedure, a flow of processing for newly adding a SeNB as an eNB that communicates with the UE while the UE is connected to the MeNB. [0004] On the other hand, although the area covered is narrower than that of mobile communication systems, the available areas have been expanded in recent years in wireless LAN (Local Area Network) communication that enables high-speed communication. Therefore, it is also being considered that the UE applies the Dual Connectivity technology to connect with the eNB that performs mobile communication and the access point AP that performs wireless LAN communication, and the UE communicates with the AP in addition to the eNB. .. Specifically, Non-Patent Document 2 shows the background, purpose, and the like of the study. [0005] Here, the billing rate applied to the UE is determined based on the radio access technology (RAT) used by the UE. For example, when the UE is performing LTE communication using MeNB and SeNB in ​​Dual Connectivity, the billing rate determined at the time of LTE communication is applied to the UE. Non-Patent Document 3 discloses a configuration of a PCC (Policy and Charging Control) Architecture for executing policy control and billing control. [0006] Non-Patent Document 4 (TS23.401) shows that the gateway device PGW (Packet Date Network Gateway) manages the RAT type for each UE as a parameter related to billing. RAT type is a parameter indicating the RAT currently used by the UE. Prior art literature Non-patent literature [0007] Non-Patent Document 1: 3GPP TS 36.300 V13.3.0 (2016-03) Sections 5.7 and 10.1.2.8 Non-Patent Document 2: 3GPP TSG RAN Meeting # 67 (2015-03) RP-150510 Non-Patent Document 3: 3GPP TS 23.203 V13.7.0 (2016-03) Section 5, A.4.2 Non-Patent Document 4: 3GPP TS 23.401 V13.6.1 (2016-03) Section 5.7.4 Outline of the invention Problems to be solved by the invention [0008] When executing Dual Connectivity described in Section 10.1.2.8 of Non-Patent Document 1, the UE communicates using one RAT common to MeNB and SeNB. In this case, as described in Non-Patent Document 4, PGW manages RAT type as a charging parameter for each UE. That is, since the PGW uses a common RAT for the communication between the UE and the MeNB and the communication between the UE and the SeNB, it is not possible to distinguish between those communications. Therefore, there is a problem that different billing rates cannot be applied to the communication between the UE and the MeNB and the communication between the UE and the SeNB. As an example, as described in Section 5.7 of Non-Patent Document 1, Dual Connectivity (Licensed) is performed between communication using a spectrum licensed by a mobile operator and communication using a spectrum not licensed by a mobile operator. -Assisted Access (LAA)) may be formed. In this case, different billing rates may be applied for these communications. However, when these communications are Dual Connnectivity using the same RAT type, there is a problem that different billing rates cannot be applied because the communications cannot be distinguished. [0009] Further, as described in Non-Patent Document 2, when the UE executes Dual Connectivity, the UE may communicate with the eNB that performs mobile communication and the access point AP that performs wireless LAN communication. In this case, the UE communicates using two types of RATs at the same time. Therefore, when the PGW manages the RAT type for each UE as in Non-Patent Document 4, the RAT type managed by the PGW may be different from the RAT actually used by the UE. As a result, when the UE communicates using two or more types of RATs, there is a problem that appropriate billing control (applying a billing rate) according to the actual communication cannot be performed. [0010] An object of the present disclosure is to provide a communication system, a control device, a communication terminal, a communication device, and a communication method capable of performing various processes related to a wireless bearer used by a communication terminal for communication. Means to solve problems [0011] The communication system according to the first aspect of the present disclosure includes a communication terminal configured to communicate with the plurality of communication devices using different wireless bearers for each of the plurality of communication devices, and the communication devices for each wireless bearer. It is provided with a control device configured to determine whether or not to measure the communication amount of the above. [0012] The control device according to the second aspect of the present disclosure is a communication device of at least one of the plurality of communication devices when the communication terminal communicates with the plurality of communication devices using different wireless bearers for each of the plurality of communication devices. The device is provided with a control unit for determining whether or not to measure the communication amount for each wireless bearer. [0013] The communication terminal according to the third aspect of the present disclosure includes a transmission unit that transmits support information indicating whether or not the plurality of communications can be performed using different wireless bearers for each of the plurality of communication devices, and a transmission unit that transmits the support information to the control device. Based on the support information and the communication permission information indicating whether or not the own device is permitted to communicate with the plurality of communication devices using the plurality of wireless bearers, the own device uses the plurality of wireless bearers. A receiving unit that receives a determination result of determining whether or not to communicate with a plurality of communication devices is instructed to communicate with a plurality of communication devices by using a plurality of wireless bearers in the determination result. When information is included, it includes a plurality of communication devices and a control unit that executes a process of setting a plurality of wireless bearers. [0014] In the communication method according to the fourth aspect of the present disclosure, when the communication terminal communicates with the plurality of communication devices by using different wireless bearers for each of the plurality of communication devices, at least one of the plurality of communication devices is communicated. It is determined whether or not the device is to measure the communication amount for each wireless bearer, and the determination result is transmitted to the communication device. The invention's effect [0015] According to the present disclosure, it is possible to provide a communication system, a control device, a communication terminal, a communication device, and a communication method capable of performing various processes related to a wireless bearer used by a communication terminal for communication. A brief description of the drawing [0016] FIG. 1 is a configuration diagram of a communication system according to the first embodiment. FIG. 2 is a configuration diagram of a communication system according to a second embodiment. FIG. 3 is a configuration diagram of a UE according to the second embodiment. FIG. 4 is a configuration diagram of an MME according to a second embodiment. FIG. 5 is a configuration diagram of a MeNB according to a second embodiment. FIG. 6 is a diagram showing a protocol stack in MeNB and SeNB according to the second embodiment. FIG. 7 is a diagram showing a flow of S1 setup processing according to the second embodiment. FIG. 8 is a diagram showing a flow of X2 setup processing according to the second embodiment. FIG. 9 is a diagram showing a flow of Attach processing according to the second embodiment. FIG. 10 is a diagram showing a flow of Attach processing according to the second embodiment. FIG. 11 is a diagram showing Access Restriction Data according to the second embodiment. FIG. 12 is a diagram showing a flow of processing in which the MeNB according to the second embodiment reports a packet amount counted for each radio bearer related to a UE. FIG. 13 is a diagram showing a flow of a plurality of PDN Connectivity establishment processes according to the third embodiment. FIG. 14 is a diagram showing a flow of a plurality of PDN Connectivity establishment processes according to the third embodiment. FIG. 15 is a diagram showing an E-UTRAN initiated E-RAB modification procedure according to the fourth embodiment. FIG. 16 is a diagram showing an S1 release procedure according to the fifth embodiment. FIG. 17 is a diagram showing a PDN GW initiated bearer deactivation procedure according to the fifth embodiment. FIG. 18 is a diagram showing an MME initiated bearer deactivation procedure according to the fifth embodiment. FIG. 19 is a diagram showing an X2 HO procedure according to a sixth embodiment. FIG. 20 is a diagram showing an X2 HO procedure according to a sixth embodiment. FIG. 21 is a diagram showing an X2 HO procedure according to a sixth embodiment. FIG. 22 is a diagram showing an S1 HO procedure according to the sixth embodiment. FIG. 23 is a diagram showing an S1 HO procedure according to the sixth embodiment. FIG. 24 is a diagram showing an S1 HO procedure according to the sixth embodiment. FIG. 25 is a diagram showing an S1 HO procedure according to the sixth embodiment. FIG. 26 is a diagram showing an S1 HO procedure according to the sixth embodiment. FIG. 27 is a block diagram of MeNB in ​​each embodiment. FIG. 28 is a configuration diagram of a UE in each embodiment. FIG. 29 is a block diagram of the MME in each embodiment. Embodiment for carrying out the invention [0017] (Embodiment 1) Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. An example of the configuration of the communication system according to the first embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 1 has a communication terminal 11, a communication device 12, a communication device 13, and a control device 14. The communication terminal 11, the communication device 12, the communication device 13, and the control device 14 may be computer devices operated by the processor executing a program stored in the memory. [0018] The communication terminal 11 is configured to communicate with a plurality of communication devices by using different wireless bearers for each of the plurality of communication devices. The communication terminal 11 may be a mobile phone terminal, a smartphone terminal, a tablet terminal, or the like. Further, the communication terminal 11 may be an M2M (Machine to Machine) terminal, an MTC (Machine Type Communication) terminal, or the like. The wireless bearer is, for example, a data communication path between the communication terminal 11 and the communication device 12, and further between the communication terminal 11 and the communication device 13. For example, as shown in FIG. 1, the communication terminal 11 may set a wireless bearer between the communication device 12 and the communication device 13. The dotted line in FIG. 1 shows the communication terminal 11, the communication device 12, and the communication device 13. The wireless bearers 121 and 131 set between and are shown. [0019] The communication device 12 and the communication device 13 may be, for example, a base station used in mobile communication. Alternatively, the communication device 12 and the communication device 13 may be an AP (Access Point) or a WT (Wireless LAN Termination) used in wireless LAN communication. Further, the communication device 12 may be a base station, and the communication device 13 may be an AP or WT (hereinafter, represented by WT). [0020] The communication terminal 11 may set a plurality of wireless bearers using one RAT. For example, the communication terminal 11 may set a plurality of wireless bearers using LTE as the RAT. Alternatively, the communication terminal 11 may set a plurality of wireless bearers using a plurality of RATs. For example, the communication terminal 11 may set a plurality of radio bearers using RAT defined as so-called 3G in LTE and 3GPP. Further, for example, the communication terminal 11 may set a plurality of wireless bearers using the wireless communication method specified in 3GPP and the wireless LAN. [0021] The control device 14 is configured to determine whether or not the communication device 12 is to measure the communication amount for each wireless bearer. The control device 14 transmits, for example, an instruction signal instructing the measurement of the communication amount for each wireless bearer to the communication device 12. When the communication terminal 11 communicates with two or more communication devices, the control device 14 may transmit an instruction signal to two or more communication devices with which the communication terminal 11 communicates. Alternatively, the control device 14 may transmit an instruction signal to the representative communication device 12 among the two or more communication devices. The representative communication device 12 measures the communication amount of the wireless bearer 121 between the communication terminal 11 and the own device 12, and also measures the communication amount of the wireless bearer 131 between the communication device 11 and the other communication device 13. , It may be measured by its own device 12, or it may be collected from another communication device 13. Specifically, when the communication between the communication terminal 11 and the communication device 13 is aggregated by the communication device 12 (in the case of Aggregation), the communication device 12 also measures the communication amount of the wireless bearer 131. Even in that case, the communication device 12 may collect the communication amount of the wireless bearer 131 measured by the communication device 13 from the communication device 13. On the other hand, when the communication between the communication terminal 11 and the communication device 13 is not aggregated by the communication device 12, the communication device 12 collects the communication amount of the wireless bearer 131 measured by the communication device 13 from the communication device 13. [0022] As described above, in the communication system of FIG. 1, the control device 14 determines whether or not the communication device 12 is made to measure the communication amount for each wireless bearer. Further, the communication device 12 measures or collects the communication amount for each wireless bearer according to the result determined by the control device 14. Thereby, for example, when the communication carrier charges according to the communication amount of the communication terminal 11, it is possible to charge according to the communication amount for each wireless bearer. [0023] For example, when the communication device 12 measures the communication amount for each wireless bearer, the communication carrier can set a different packet unit price for each wireless bearer and charge for each wireless bearer. [0024] (Embodiment 2) Subsequently, a configuration example of the communication system according to the second embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 2 shows a configuration diagram of a communication system defined in 3GPP. The communication system of FIG. 2 includes UE20, MeNB21, SeNB22, MME (Mobility Management Entity) 23, HSS (Home Subscriber Server) 24, SGW (Serving Gateway) 25, PGW26, PCRF (Policy and Charging Rule Function) entity 27 (hereinafter). , PCRF27), AF (Application Function) entity 28 (hereinafter referred to as AF28), OFCS29 (Offline Charging System), and OCS (Online Charging System) 30. [0025] The UE 20 corresponds to the communication terminal 11 in FIG. UE20 is used as a general term for communication terminals in 3GPP. The MeNB 21 corresponds to the communication device 12 in FIG. SeNB 22 corresponds to the communication device 13 of FIG. The MeNB 21 and SeNB 22 are base stations used when the UE 20 performs Dual Connectivity. The MME 23 corresponds to the control device 14 in FIG. The MME 23 is a device that mainly performs movement management of the UE 20, a bearer setting request, a bearer setting instruction, a bearer deletion request, or a bearer deletion instruction. [0026] The SGW 25 is a device that is connected to the wireless access system and transfers user data between the wireless access system and the PGW 26. The PGW 26 connects to an external network (PDN: Packet Data Network, etc.). PCRF27 determines policies (billing system) such as QoS (Quality of Service) control or billing control in MeNB21, SeNB22 and PGW26. [0027] The AF28 is a device that provides an application, and controls the application service provided to the UE 20. OCS30 and OFCS29 perform billing control and the like according to the billing contract of UE20. For example, in the case of a billing contract such as a prepaid service, the OCS30 having an ability to constantly monitor the communication amount performs the billing process. On the other hand, in the case of a monthly billing contract, OFCS29 performs billing processing. [0028] Subsequently, a configuration example of the UE 20 according to the second embodiment of the present disclosure will be described with reference to FIG. The UE 20 has a transmission / reception unit 41, a transmission / reception unit 42, and a control unit (Controller) 43. The components constituting the UE 20 such as the transmission / reception unit 41, the transmission / reception unit 42, and the control unit 43 may be modules or software whose processing is executed by the processor executing a program stored in the memory. Alternatively, the component constituting the UE 20 may be hardware such as a chip or a circuit. The transmitter / receiver unit 41 and the transmitter / receiver unit 42 may be a transmitter unit (Transmitter) and a receiver unit (Receiver). [0029] The transmission / reception unit 41 communicates with the MeNB 21. The transmission / reception unit 41 may perform wireless communication with the MeNB 21 using LTE defined as a wireless communication method in 3GPP, for example. The transmission / reception unit 42 communicates with the SeNB 22. The transmission / reception unit 42 may also perform wireless communication with the SeNB 22 using LTE. Further, the transmission / reception unit 42 may communicate with a communication device different from SeNB 22 by using a wireless communication method different from LTE. For example, the transmission / reception unit 42 may communicate with the WT using wireless LAN communication. In this case, it is assumed that the WT is a communication device capable of communicating with the MeNB 21. That is, the transmission / reception unit 42 communicates with the MeNB 21 via the SeNB 22 or the WT. [0030] When using Dual Connectivity, the control unit 43 executes control to distribute transmission data to the transmission / reception unit 41 and the transmission / reception unit 42. The control unit 43 may further perform modulation processing of transmission data and the like. Further, the control unit 43 may execute a decoding process regarding the received data output from the transmission / reception unit 41 and the transmission / reception unit 42.

We Claim:
1. A communication terminal comprising:
means for transmitting an Attach Request message to a Mobility
Management Entity (MME) during Attach procedure, the Attach Request
message including first information indicating that the communication terminal
supports Dual Connectivity with a Master base station providing Evolved
Universal Terrestrial Radio Access (E-UTRA) and a Secondary base station
providing radio communication scheme in 5G; and
means for receiving an Attach Accept message from the MME during
the Attach procedure, the Attach Accept message including second information
indicating whether or not use of Dual Connectivity with the radio
communication scheme in 5G is restricted, and for receiving a RRC Connection
Reconfiguration message from the Master base station during a Secondary Node
Addition procedure for operating the Dual Connectivity, the RRC Connection
Reconfiguration message being received after receiving the Attach Accept
message.
2. The communication terminal according to Claim 1, wherein the
Dual Connectivity is E-UTRA-NR Dual Connectivity (EN-DC).
3. The communication terminal according to Claim 1 or 2, wherein
the Master base station is connected to the Secondary base station via X2
interface.
4. The communication terminal according to any one of Claims 1
to 3, wherein the Secondary Node Addition procedure is a process of adding
radio resources from the Secondary base station to the communication terminal.
5. The communication terminal according to any one of Claims 1
to 4, wherein the second information indicates whether or not the use of Dual
Connectivity with the radio communication scheme in 5G is restricted by
Evolved Packet System (EPS) network.
6. The communication terminal according to any one of Claims 1
to 5, wherein the means for transmitting is configured to reply to the Master base station with a RRC Connection Reconfiguration Complete message during
the Secondary Node Addition procedure.
7. A Master base station providing Evolved Universal Terrestrial
Radio Access (E-UTRA), the Master base station comprising:
means for receiving an Attach Request message from a communication
terminal, the Attach Request message including first information indicating that
the communication terminal supports Dual Connectivity with the Master base
station and a Secondary base station providing radio communication scheme in
5G; and
means for transmitting the Attach Request message to a Mobility
Management Entity (MME) during an Attach procedure, wherein
the means for receiving is configured to receive, from the MME, an
Attach Accept message including second information indicating whether or not
use of Dual Connectivity with the radio communication scheme in 5G is
restricted, and
the means for transmitting is configured to transmit the Attach Accept
message to the communication terminal during the Attach procedure, and to
transmit a RRC Connection Reconfiguration message to the communication
terminal during a Secondary Node Addition procedure for operating the Dual
Connectivity, the RRC Connection Reconfiguration message being transmitted
after transmitting the Attach Accept message.
8. The Master base station according to Claim 7, wherein the Dual
Connectivity is E-UTRA-NR Dual Connectivity (EN-DC).
9. The Master base station according to Claim 7 or 8, wherein the
means for receiving is configured to receive a RRC Connection Reconfiguration
Complete message from the communication terminal during the Secondary Node
Addition procedure.
10. The Master base station according to any one of Claims 7 to 9,
wherein the second information indicates whether or not the use of Dual
Connectivity with the radio communication scheme in 5G is restricted by Evolved Packet System (EPS) network.
11. A method of a communication terminal, the method comprising:
transmitting an Attach Request message to a Mobility Management
Entity (MME) during Attach procedure, the Attach Request message including
first information indicating that the communication terminal supports Dual
Connectivity with a Master base station providing Evolved Universal Terrestrial
Radio Access (E-UTRA) and a Secondary base station providing radio
communication scheme in 5G;
receiving an Attach Accept message from the MME during the Attach
procedure, the Attach Accept message including second information indicating
whether or not use of Dual Connectivity with the radio communication scheme
in 5G is restricted; and
receiving a RRC Connection Reconfiguration message from the Master
base station during a Secondary Node Addition procedure for operating the Dual
Connectivity, the RRC Connection Reconfiguration message being received
after receiving the Attach Accept message.
12. The method of the communication terminal according to Claim
11, wherein the second information indicates whether or not the use of Dual
Connectivity with the radio communication scheme in 5G is restricted by
Evolved Packet System (EPS) network.

The present disclosure relates to a communication system, a control device, a communication terminal, a communication device, and a communication method, and more particularly to a communication system, a control device, a communication terminal, a communication device, and a communication method for communicating using a plurality of wireless bearers.
Background technology
[0002]
In the 3GPP (3rd Generation Partnership Project), which is a standard for mobile communication systems, there is Dual Connectivity as a technology for the communication terminal UE (User Equipment) to execute wideband and low delay communication. Dual Connectivity means, for example, that the UE connects with the first base station MeNB (Master evolved NodeB) and the second base station SeNB (Secondary eNB) that perform LTE (Long Term Evolution) communication, and the UE also connects with SeNB in ​​addition to MeNB. It is a technology for communication. This makes it possible to improve the communication throughput.
[0003]
Non-Patent Document 1 describes, as a Dual Connectivity procedure, a flow of processing for newly adding a SeNB as an eNB that communicates with the UE while the UE is connected to the MeNB.
[0004]
On the other hand, although the area covered is narrower than that of mobile communication systems, the available areas have been expanded in recent years in wireless LAN (Local Area Network) communication that enables high-speed communication. Therefore, it is also being considered that the UE applies the Dual Connectivity technology to connect with the eNB that performs mobile communication and the access point AP that performs wireless LAN communication, and the UE communicates with the AP in addition to the eNB. .. Specifically, Non-Patent Document 2 shows the background, purpose, and the like of the study.
[0005]
Here, the billing rate applied to the UE is determined based on the radio access technology (RAT) used by the UE. For example, when the UE is performing LTE communication using MeNB and SeNB in ​​Dual Connectivity, the billing rate determined at the time of LTE communication is applied to the UE. Non-Patent Document 3 discloses a configuration of a PCC (Policy and Charging Control) Architecture for executing policy control and billing control.
[0006]
Non-Patent Document 4 (TS23.401) shows that the gateway device PGW (Packet Date Network Gateway) manages the RAT type for each UE as a parameter related to billing. RAT type is a parameter indicating the RAT currently used by the UE.
Prior art literature
Non-patent literature
[0007]
Non-Patent Document 1: 3GPP TS 36.300 V13.3.0 (2016-03) Sections 5.7 and 10.1.2.8
Non-Patent Document 2: 3GPP TSG RAN Meeting # 67 (2015-03) RP-150510
Non-Patent Document 3: 3GPP TS 23.203 V13.7.0 (2016-03) Section 5, A.4.2
Non-Patent Document 4: 3GPP TS 23.401 V13.6.1 (2016-03) Section 5.7.4
Outline of the invention
Problems to be solved by the invention
[0008]
When executing Dual Connectivity described in Section 10.1.2.8 of Non-Patent Document 1, the UE communicates using one RAT common to MeNB and SeNB. In this case, as described in Non-Patent Document 4, PGW manages RAT type as a charging parameter for each UE. That is, since the PGW uses a common RAT for the communication between the UE and the MeNB and the communication between the UE and the SeNB, it is not possible to distinguish between those communications. Therefore, there is a problem that different billing rates cannot be applied to the communication between the UE and the MeNB and the communication between the UE and the SeNB. As an example, as described in Section 5.7 of Non-Patent Document 1, Dual Connectivity (Licensed) is performed between communication using a spectrum licensed by a mobile operator and communication using a spectrum not licensed by a mobile operator. -Assisted Access (LAA)) may be formed. In this case, different billing rates may be applied for these communications. However, when these communications are Dual Connnectivity using the same RAT type, there is a problem that different billing rates cannot be applied because the communications cannot be distinguished.
[0009]
Further, as described in Non-Patent Document 2, when the UE executes Dual Connectivity, the UE may communicate with the eNB that performs mobile communication and the access point AP that performs wireless LAN communication. In this case, the UE communicates using two types of RATs at the same time. Therefore, when the PGW manages the RAT type for each UE as in Non-Patent Document 4, the RAT type managed by the PGW may be different from the RAT actually used by the UE. As a result, when the UE communicates using two or more types of RATs, there is a problem that appropriate billing control (applying a billing rate) according to the actual communication cannot be performed.
[0010]
An object of the present disclosure is to provide a communication system, a control device, a communication terminal, a communication device, and a communication method capable of performing various processes related to a wireless bearer used by a communication terminal for communication.
Means to solve problems
[0011]
The communication system according to the first aspect of the present disclosure includes a communication terminal configured to communicate with the plurality of communication devices using different wireless bearers for each of the plurality of communication devices, and the communication devices for each wireless bearer. It is provided with a control device configured to determine whether or not to measure the communication amount of the above.
[0012]
The control device according to the second aspect of the present disclosure is a communication device of at least one of the plurality of communication devices when the communication terminal communicates with the plurality of communication devices using different wireless bearers for each of the plurality of communication devices. The device is provided with a control unit for determining whether or not to measure the communication amount for each wireless bearer.
[0013]
The communication terminal according to the third aspect of the present disclosure includes a transmission unit that transmits support information indicating whether or not the plurality of communications can be performed using different wireless bearers for each of the plurality of communication devices, and a transmission unit that transmits the support information to the control device. Based on the support information and the communication permission information indicating whether or not the own device is permitted to communicate with the plurality of communication devices using the plurality of wireless bearers, the own device uses the plurality of wireless bearers. A receiving unit that receives a determination result of determining whether or not to communicate with a plurality of communication devices is instructed to communicate with a plurality of communication devices by using a plurality of wireless bearers in the determination result. When information is included, it includes a plurality of communication devices and a control unit that executes a process of setting a plurality of wireless bearers.
[0014]
In the communication method according to the fourth aspect of the present disclosure, when the communication terminal communicates with the plurality of communication devices by using different wireless bearers for each of the plurality of communication devices, at least one of the plurality of communication devices is communicated. It is determined whether or not the device is to measure the communication amount for each wireless bearer, and the determination result is transmitted to the communication device.
The invention's effect
[0015]
According to the present disclosure, it is possible to provide a communication system, a control device, a communication terminal, a communication device, and a communication method capable of performing various processes related to a wireless bearer used by a communication terminal for communication.
A brief description of the drawing
[0016]
FIG. 1 is a configuration diagram of a communication system according to the first embodiment.
FIG. 2 is a configuration diagram of a communication system according to a second embodiment.
FIG. 3 is a configuration diagram of a UE according to the second embodiment.
FIG. 4 is a configuration diagram of an MME according to a second embodiment.
FIG. 5 is a configuration diagram of a MeNB according to a second embodiment.
FIG. 6 is a diagram showing a protocol stack in MeNB and SeNB according to the second embodiment.
FIG. 7 is a diagram showing a flow of S1 setup processing according to the second embodiment.
FIG. 8 is a diagram showing a flow of X2 setup processing according to the second embodiment.
FIG. 9 is a diagram showing a flow of Attach processing according to the second embodiment.
FIG. 10 is a diagram showing a flow of Attach processing according to the second embodiment.
FIG. 11 is a diagram showing Access Restriction Data according to the second embodiment.
FIG. 12 is a diagram showing a flow of processing in which the MeNB according to the second embodiment reports a packet amount counted for each radio bearer related to a UE.
FIG. 13 is a diagram showing a flow of a plurality of PDN Connectivity establishment processes according to the third embodiment.
FIG. 14 is a diagram showing a flow of a plurality of PDN Connectivity establishment processes according to the third embodiment.
FIG. 15 is a diagram showing an E-UTRAN initiated E-RAB modification procedure according to the fourth embodiment.
FIG. 16 is a diagram showing an S1 release procedure according to the fifth embodiment.
FIG. 17 is a diagram showing a PDN GW initiated bearer deactivation procedure according to the fifth embodiment.
FIG. 18 is a diagram showing an MME initiated bearer deactivation procedure according to the fifth embodiment.
FIG. 19 is a diagram showing an X2 HO procedure according to a sixth embodiment.
FIG. 20 is a diagram showing an X2 HO procedure according to a sixth embodiment.
FIG. 21 is a diagram showing an X2 HO procedure according to a sixth embodiment.
FIG. 22 is a diagram showing an S1 HO procedure according to the sixth embodiment.
FIG. 23 is a diagram showing an S1 HO procedure according to the sixth embodiment.
FIG. 24 is a diagram showing an S1 HO procedure according to the sixth embodiment.
FIG. 25 is a diagram showing an S1 HO procedure according to the sixth embodiment.
FIG. 26 is a diagram showing an S1 HO procedure according to the sixth embodiment.
FIG. 27 is a block diagram of MeNB in ​​each embodiment.
FIG. 28 is a configuration diagram of a UE in each embodiment.
FIG. 29 is a block diagram of the MME in each embodiment.
Embodiment for carrying out the invention
[0017]
(Embodiment 1)
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. An example of the configuration of the communication system according to the first embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 1 has a communication terminal 11, a communication device 12, a communication device 13, and a control device 14. The communication terminal 11, the communication device 12, the communication device 13, and the control device 14 may be computer devices operated by the processor executing a program stored in the memory.
[0018]
The communication terminal 11 is configured to communicate with a plurality of communication devices by using different wireless bearers for each of the plurality of communication devices. The communication terminal 11 may be a mobile phone terminal, a smartphone terminal, a tablet terminal, or the like. Further, the communication terminal 11 may be an M2M (Machine to Machine) terminal, an MTC (Machine Type Communication) terminal, or the like. The wireless bearer is, for example, a data communication path between the communication terminal 11 and the communication device 12, and further between the communication terminal 11 and the communication device 13. For example, as shown in FIG. 1, the communication terminal 11 may set a wireless bearer between the communication device 12 and the communication device 13. The dotted line in FIG. 1 shows the communication terminal 11, the communication device 12, and the communication device 13. The wireless bearers 121 and 131 set between and are shown.
[0019]
The communication device 12 and the communication device 13 may be, for example, a base station used in mobile communication. Alternatively, the communication device 12 and the communication device 13 may be an AP (Access Point) or a WT (Wireless LAN Termination) used in wireless LAN communication. Further, the communication device 12 may be a base station, and the communication device 13 may be an AP or WT (hereinafter, represented by WT).
[0020]
The communication terminal 11 may set a plurality of wireless bearers using one RAT. For example, the communication terminal 11 may set a plurality of wireless bearers using LTE as the RAT. Alternatively, the communication terminal 11 may set a plurality of wireless bearers using a plurality of RATs. For example, the communication terminal 11 may set a plurality of radio bearers using RAT defined as so-called 3G in LTE and 3GPP. Further, for example, the communication terminal 11 may set a plurality of wireless bearers using the wireless communication method specified in 3GPP and the wireless LAN.
[0021]
The control device 14 is configured to determine whether or not the communication device 12 is to measure the communication amount for each wireless bearer. The control device 14 transmits, for example, an instruction signal instructing the measurement of the communication amount for each wireless bearer to the communication device 12. When the communication terminal 11 communicates with two or more communication devices, the control device 14 may transmit an instruction signal to two or more communication devices with which the communication terminal 11 communicates. Alternatively, the control device 14 may transmit an instruction signal to the representative communication device 12 among the two or more communication devices. The representative communication device 12 measures the communication amount of the wireless bearer 121 between the communication terminal 11 and the own device 12, and also measures the communication amount of the wireless bearer 131 between the communication device 11 and the other communication device 13. , It may be measured by its own device 12, or it may be collected from another communication device 13. Specifically, when the communication between the communication terminal 11 and the communication device 13 is aggregated by the communication device 12 (in the case of Aggregation), the communication device 12 also measures the communication amount of the wireless bearer 131. Even in that case, the communication device 12 may collect the communication amount of the wireless bearer 131 measured by the communication device 13 from the communication device 13. On the other hand, when the communication between the communication terminal 11 and the communication device 13 is not aggregated by the communication device 12, the communication device 12 collects the communication amount of the wireless bearer 131 measured by the communication device 13 from the communication device 13.
[0022]
As described above, in the communication system of FIG. 1, the control device 14 determines whether or not the communication device 12 is made to measure the communication amount for each wireless bearer. Further, the communication device 12 measures or collects the communication amount for each wireless bearer according to the result determined by the control device 14. Thereby, for example, when the communication carrier charges according to the communication amount of the communication terminal 11, it is possible to charge according to the communication amount for each wireless bearer.
[0023]
For example, when the communication device 12 measures the communication amount for each wireless bearer, the communication carrier can set a different packet unit price for each wireless bearer and charge for each wireless bearer.
[0024]
(Embodiment 2)
Subsequently, a configuration example of the communication system according to the second embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 2 shows a configuration diagram of a communication system defined in 3GPP. The communication system of FIG. 2 includes UE20, MeNB21, SeNB22, MME (Mobility Management Entity) 23, HSS (Home Subscriber Server) 24, SGW (Serving Gateway) 25, PGW26, PCRF (Policy and Charging Rule Function) entity 27 (hereinafter). , PCRF27), AF (Application Function) entity 28 (hereinafter referred to as AF28), OFCS29 (Offline Charging System), and OCS (Online Charging System) 30.
[0025]
The UE 20 corresponds to the communication terminal 11 in FIG. UE20 is used as a general term for communication terminals in 3GPP. The MeNB 21 corresponds to the communication device 12 in FIG. SeNB 22 corresponds to the communication device 13 of FIG. The MeNB 21 and SeNB 22 are base stations used when the UE 20 performs Dual Connectivity. The MME 23 corresponds to the control device 14 in FIG. The MME 23 is a device that mainly performs movement management of the UE 20, a bearer setting request, a bearer setting instruction, a bearer deletion request, or a bearer deletion instruction.
[0026]
The SGW 25 is a device that is connected to the wireless access system and transfers user data between the wireless access system and the PGW 26. The PGW 26 connects to an external network (PDN: Packet Data Network, etc.). PCRF27 determines policies (billing system) such as QoS (Quality of Service) control or billing control in MeNB21, SeNB22 and PGW26.
[0027]
The AF28 is a device that provides an application, and controls the application service provided to the UE 20. OCS30 and OFCS29 perform billing control and the like according to the billing contract of UE20. For example, in the case of a billing contract such as a prepaid service, the OCS30 having an ability to constantly monitor the communication amount performs the billing process. On the other hand, in the case of a monthly billing contract, OFCS29 performs billing processing.
[0028]
Subsequently, a configuration example of the UE 20 according to the second embodiment of the present disclosure will be described with reference to FIG. The UE 20 has a transmission / reception unit 41, a transmission / reception unit 42, and a control unit (Controller) 43. The components constituting the UE 20 such as the transmission / reception unit 41, the transmission / reception unit 42, and the control unit 43 may be modules or software whose processing is executed by the processor executing a program stored in the memory. Alternatively, the component constituting the UE 20 may be hardware such as a chip or a circuit. The transmitter / receiver unit 41 and the transmitter / receiver unit 42 may be a transmitter unit (Transmitter) and a receiver unit (Receiver).
[0029]
The transmission / reception unit 41 communicates with the MeNB 21. The transmission / reception unit 41 may perform wireless communication with the MeNB 21 using LTE defined as a wireless communication method in 3GPP, for example. The transmission / reception unit 42 communicates with the SeNB 22. The transmission / reception unit 42 may also perform wireless communication with the SeNB 22 using LTE. Further, the transmission / reception unit 42 may communicate with a communication device different from SeNB 22 by using a wireless communication method different from LTE. For example, the transmission / reception unit 42 may communicate with the WT using wireless LAN communication. In this case, it is assumed that the WT is a communication device capable of communicating with the MeNB 21. That is, the transmission / reception unit 42 communicates with the MeNB 21 via the SeNB 22 or the WT.
[0030]
When using Dual Connectivity, the control unit 43 executes control to distribute transmission data to the transmission / reception unit 41 and the transmission / reception unit 42. The control unit 43 may further perform modulation processing of transmission data and the like. Further, the control unit 43 may execute a decoding process regarding the received data output from the transmission / reception unit 41 and the transmission / reception unit 42.