Communication system, control device, communication terminal, communication device, and communication method
In order to provide a communication system capable of charging control in accordance with a bearer used by a UE even when the UE performs dual connectivity, a communication system according to the present disclosure includes a communication terminal ( 11 ) configured to communicate with a communication device ( 12 ) and a communication device ( 13 ) by using a different radio bearer for each of the communication device ( 12 ) and the communication device ( 13 ), and a control device ( 14 ) configured to determine whether to cause the communication device ( 12 ) to measure the traffic of each radio bearer.
1. An UE (User Equipment) comprising:
a memory; and
one or more processors, comprising hardware, configured to:
send an Attach Request message to a MME (Mobility Management Entity) during an Attach procedure, the Attach Request message including first information indicating that the UE supports dual connectivity with a master base station providing E-UTRA (Evolved UTRA (Universal Terrestrial Radio Access)) and a secondary base station providing radio communication scheme in 5G;
receive an Attach Accept message from the MME during the Attach procedure, the Attach Accept message including second information indicating whether use of dual connectivity with the radio communication scheme in 5G is restricted or not; and
receive 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 UE according to claim 1 , wherein the dual connectivity is E-UTRA-NR Dual Connectivity (EN-DC).
3. The UE according to claim 1 , wherein the master base station is connected to the secondary base station via X2 interface.
4. The UE according to claim 1 , wherein the Secondary Node Addition procedure is a process of adding resources from the secondary base station to the UE.
5. The UE according to claim 1 , wherein the second information indicates whether the use of dual connectivity with the radio communication scheme in 5G is restricted by an Evolved Packet System (EPS) network or not.
6. The UE according to claim 1 , wherein the processor is further configured to:
apply a new configuration to the secondary base station; and
reply to the master base station with a RRC Connection Reconfiguration Complete message during the Secondary Node Addition procedure.
7. A MME (Mobility Management Entity) comprising:
a memory; and
one or more processors, comprising hardware, configured to:
receive, by the MME, an Attach Request message from an UE (User Equipment) during Attach procedure, the Attach Request message including first information indicating that the UE supports Dual Connectivity with a master base station providing E-UTRA (Evolved UTRA (Universal Terrestrial Radio Access)) and a secondary base station providing radio communication scheme in 5G;
decide whether or not to restrict use of dual connectivity with the radio communication scheme in 5G for the UE, based on the first information and second information; and
send an Attach Accept message to the UE during the Attach procedure, the Attach Accept message including the second information indicating whether use of dual connectivity with the radio communication scheme in 5G is restricted or not.
8. The MME according to claim 7 , wherein the processor is further configured to perform a Secondary Node Addition procedure for providing resources from the secondary base station to the UE after the Attach procedure.
9. The MME according to claim 7 , wherein the processor is further configured to
select a SGW (Serving GW) during the Attach procedure if the MME has the first information and the second information indicates that the use of dual connectivity with the radio communication scheme in 5G is not restricted.
10. The MME according to claim 7 , wherein the dual connectivity is E-UTRA-NR Dual Connectivity (EN-DC).
11. The MME according to claim 7 , wherein the second information indicates the use of dual connectivity with the radio communication scheme in 5G is restricted by an Evolved Packet System (EPS) network or not.
12. A master base station providing E-UTRA (Evolved UTRA (Universal Terrestrial Radio Access)), the master base station comprising:
a memory; and
one or more processors, comprising hardware, configured to:
receive, by the master base station, an Attach Request message from an UE (User Equipment);
send the Attach Request message to a MME (Mobility Management Entity) during an Attach procedure, the Attach Request message including first information indicating that the UE supports dual connectivity with the master base station and a secondary base station providing radio communication scheme in 5G;
receive an Attach Accept message from the MME;
send the Attach Accept message to the UE during the Attach procedure, the Attach Accept message including second information indicating whether use of dual connectivity with the radio communication scheme in 5G is restricted or not; and
send a RRC Connection Reconfiguration message to the UE during a Secondary Node Addition procedure for operating the dual connectivity, the RRC Connection Reconfiguration message being sent after sending the Attach Accept message.
13. The master base station according to claim 12 , wherein the dual connectivity is E-UTRA-NR Dual Connectivity (EN-DC).
14. The master base station according to claim 12 , wherein the processor is further configured to receive a RRC Connection Reconfiguration Complete message from the UE during the Secondary Node Addition procedure.
15. The master base station according to claim 12 , wherein the second information indicates whether the use of dual connectivity with the radio communication scheme in 5G is restricted by an Evolved Packet System (EPS) network or not.
16. A method for an UE (User Equipment) the method comprising:
sending an Attach Request message to a MME (Mobility Management Entity) during Attach procedure, the Attach Request message including first information indicating that the UE supports dual connectivity with a master base station providing E-UTRA (Evolved UTRA (Universal Terrestrial Radio Access)) 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 use of dual connectivity with the radio communication scheme in 5G is restricted or not; 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.
17. The method according to claim 16 , wherein the second information indicates whether the use of dual connectivity with the radio communication scheme in 5G is restricted by an Evolved Packet System (EPS) network or not.