JP2012104894A - Mobile communication method, radio base station, mobile station, and mobile management node - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine whether VoLTE communication should be performed or a CSFB function should be performed taking into account SPS capability of a mobile station UE.SOLUTION: A mobile communication method of the invention includes the steps of: a radio base station eNB generating an information element "SPS Capability" to give notice of the SPS capability of a mobile station UE in accordance with the S1-AP protocol; the radio base station eNB transmitting a signal "UE CAPABILITY INFO INDICATION" including the generated information element "SPS Capability" to a mobile management node MME; and the mobile management node MME notifying the mobile station UE whether VoLTE communication should be performed or a CSFB function should be performed based on the information element "SPS Capability" and information indicating whether the mobile station UE is capable of IMS Voice communication and the CSFB.

Description

  The present invention relates to a mobile communication method, a radio base station, a mobile station, and a mobility management node.

  In LTE (Long Term Evolution) type radio access networks, that is, EUTRAN (Enhanced Universal Terrestrial Access Network), SPS (Semi-Persistent Scheduling) can be used for semi-persistent scheduling (Semi-Persistent Scheduling).

  However, such an SPS function is not necessarily a function that must be installed in a mobile station UE that can support “IMS (IP Multimedia Subsystem) Voice communication”.

  Therefore, in order for a mobile station UE that does not support SPS to perform IMS Voice communication, it is necessary to apply dynamic scheduling (Dynamic Scheduling).

3GPP TS36.300 3GPP TS36.331

  However, when dynamic scheduling is applied, due to the overhead due to the control channel (PDCCH: Physical Downlink Control Channel), the number of connectable mobile stations UE decreases, the radio utilization efficiency decreases, and the mobile station UE uses only data communication. There was a problem that a situation such as a decrease in scheduling opportunities occurred.

  Therefore, in order to solve such a problem, in order for a mobile station UE not supporting SPS to perform voice communication, when the mobile station UE supports CSFB (Circuit Switched Fallback), It is assumed that the mobile station UE is instructed to perform CSFB.

  However, the SPS capability that indicates whether or not the mobile station UE is compatible with the SPS is managed by the radio base station eNB, and the mobility management node MME (Mobility Management Entity) considers the SPS capability and uses the LTE scheme. It is determined whether to perform IMS Voice communication via the radio access network (that is, whether to perform VoLTE (IMS Voice over LTE)) or, if the mobile station UE has CSFB capability, whether to perform CSFB. There was a problem that it was not possible.

  Therefore, the present invention has been made in view of the above-described problems. In consideration of the SPS capability of the mobile station UE, VoLTE should be performed, or if the mobile station UE has the CSFB capability, the CSFB is It is an object of the present invention to provide a mobile communication method, a radio base station, a mobile station, and a mobility management node that can determine whether to perform.

  A first feature of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. In a mobile communication system, a mobile communication method in which a mobile station performs voice communication, wherein a radio base station in the first radio access network is configured to use the protocol used between the radio base station and a mobility management node. A step of generating an information element for notifying a semi-persistent scheduling capability indicating whether or not the mobile station supports semi-persistent scheduling; and the radio base station generates the mobile management node Transmitting a signal including an information element; and Based on the information element and information indicating whether the mobile station can support voice communication using the packet switching service and the circuit switching service, the mobile station is provided with a packet switching service in the first radio access network. And a step of notifying whether voice communication using the circuit switching service is to be performed in the second radio access network.

  The second feature of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. A radio base station in the first radio access network used in a mobile communication system, and whether or not the mobile station can cope with semi-persistent scheduling according to a protocol used between the radio base station and a mobility management node Is configured to generate an information element for notifying the semi-persistent scheduling capability indicated, and configured to transmit a signal including the generated information element to the mobility management node. This is the gist.

  The third aspect of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. In a mobile communication system, a mobile communication method in which a mobile station performs voice communication, wherein the mobile station performs semi-persistent scheduling of the mobile station according to a protocol used between the mobile station and a mobile management node. A step of generating an information element for notifying a semi-persistent scheduling capability indicating whether it can be supported, and a step of transmitting a signal including the generated information element to the mobility management node. The mobility management node includes the information element and the packet switching server of the mobile station. On the basis of information indicating whether or not to support voice communication using a network and a circuit switching service, the mobile station should perform voice communication using a packet switching service in the first radio access network, or And a step of notifying whether voice communication using a circuit switching service should be performed in the second wireless access network.

  A fourth feature of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. A mobile station used in a mobile communication system, which notifies a semi-persistent scheduling capability indicating whether or not the mobile station is compatible with semi-persistent scheduling according to a protocol used between the mobile station and a mobility management node. The gist of the present invention is that the information element for generating the information element is generated and configured to transmit a signal including the generated information element to the mobility management node.

  A fifth feature of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. In a mobile communication system, a mobile communication method in which a mobile station performs voice communication, wherein the mobile station uses the mobile station according to a protocol used between the mobile station and a radio base station in the first radio access network. A step of generating an information element for notifying a semi-persistent scheduling capability indicating whether or not a station can support semi-persistent scheduling; and the mobile station generates the information element generated for the radio base station. Transmitting the signal including: the radio base station to the mobility management node, Transmitting a signal including the information element; the mobility management node decrypting the information element; and the mobility management node decrypting the information element and the packet switching service and circuit switching of the mobile station Whether the mobile station should perform voice communication using a packet switching service in the first radio access network based on information indicating whether or not to support voice communication using a service, or the second And a step of notifying whether voice communication using a circuit switching service should be performed in a wireless access network.

  A sixth aspect of the present invention includes a first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and a second radio access network that can provide a packet switching service and a circuit switching service. A mobility management node used in a mobile communication system, wherein the mobility generated by a protocol used between a mobile station and the radio base station in a signal received from a radio base station in the first radio access network Configured to decode an information element for notifying a semi-persistent scheduling capability indicating whether or not the station can cope with semi-persistent scheduling, the decoded information element and the packet switching service of the mobile station; Support for voice communication using circuit switching services Whether voice communication using the packet switching service should be performed for the mobile station based on the information indicating availability, or voice communication using the circuit switching service should be performed in the second radio access network The gist is that it is configured to notify the user.

  As described above, according to the present invention, in consideration of the SPS capability of the mobile station UE, it is determined whether to perform VoLTE, or if the mobile station UE has the CSFB capability, whether to perform CSFB. A mobile communication method, a radio base station, a mobile station, and a mobility management node can be provided.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 3 is a functional block diagram of a radio base station according to the first embodiment of the present invention. It is a figure which shows an example of a format of "UE CAPABILITY INFO INDICATION" used with the mobile communication system which concerns on the 1st Embodiment of this invention. 2 is a functional block diagram of a mobility management node according to the first embodiment of the present invention. FIG. FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. It is a functional block diagram of the mobile station which concerns on the modification 1 of this invention. It is a figure which shows an example of a format of "ATTACH REQUEST" used with the mobile communication system which concerns on the modification 1 of this invention. It is a figure which shows an example of a format of "UE CAPABILITY INFO INDICATION" used with the mobile communication system which concerns on the modification 2 of this invention.

(Mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 6, the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the mobile communication system according to the present embodiment is a mobile communication system including E-UTRA and UTRA, and includes a mobility management node that accommodates E-UTRAN and a serving gateway device S-GW ( Serving Gateway), packet data network gateway device P-GW (PDN Gateway), packet switch SGSN (Serving GPRS Supporting Node), circuit switch MSC (Mobile-service Switching Center), subscriber management server device SS (Subscriber Server), IMS, and the like.

  Note that the mobile communication system according to the present embodiment is configured to be able to provide SPS, VoLTE, CSFB, and the like.

  As illustrated in FIG. 2, the radio base station eNB according to the present embodiment includes a transmission unit 11 and a reception unit 12.

  The transmission unit 11 is configured to transmit various signals to the mobile station UE and the mobility management node MME.

  For example, the transmission unit 11 is configured to transmit a signal “RRC: UE Capability Enquiry” or the like to the mobile station UE.

  The transmission unit 11 is configured to transmit a signal “S1-AP: INITIAL CONTEXT SETUP RESPONSE”, “S1-AP: UE CAPABILITY INFO INDICATION”, and the like to the mobility management node MME.

  Here, as illustrated in FIG. 3, the transmission unit 11 generates the information element “SPS Capability” using the S1-AP protocol, and includes the generated information element “SPS Capability” for the mobility management node MME. The signal “S1-AP: UE CAPABILITY INFO INDICATION” is configured to be transmitted.

  Specifically, as illustrated in FIG. 3, the transmission unit 11 is generated by the S1-AP protocol as a new information element in addition to the existing information element of the signal “S1-AP: UE CAPABILITY INFO INDICATION”. The information element “SPS Capability” may be added.

  Since the information element “SPS Capability” is generated by the S1-AP protocol, it can be decoded by the S1-AP protocol function of the mobility management node MME.

  The receiving unit 12 is configured to receive various signals transmitted by the mobile station UE and the mobility management node MME.

  For example, the receiving unit 12 is configured to receive a signal “RRC: UE Capability Information” transmitted by the mobile station UE.

  Further, the receiving unit 12 is configured to receive a signal “S1-AP: INITIAL CONTEXT SETUP REQUEST” transmitted by the mobility management node MME.

  As illustrated in FIG. 4, the mobility management node MME according to the present embodiment includes a reception unit 21, a determination unit 22, and a transmission unit 23.

  The receiving unit 21 is configured to receive various signals transmitted by the radio base station eNB and the mobile station UE.

  For example, the reception unit 21 is configured to receive a signal “S1-AP: INITIAL CONTEXT SETUP RESPONSE”, “S1-AP: UE CAPABILITY INFO INDICATION”, or the like transmitted by the radio base station eNB.

  The receiving unit 21 is configured to receive signals “ATTACH REQUEST”, “TRACKING AREA UPDATE REQUEST”, and the like transmitted by the mobile station UE.

  The determination unit 22 manages information indicating whether or not the mobile station UE can handle IMS Voice communication.

  Here, the determination unit 22 responds to the information element “SPS Capability” included in the signal “S1-AP: UE CAPABILITY INFO INDICATION” received by the reception unit 21 and the IMS Voice communication and CSFB of the mobile station UE. The mobile station UE is configured to determine whether to perform VoLTE or CSFB based on information indicating whether or not the mobile station UE is available.

  For example, the determination unit 22 may be configured to determine that VoLTE should be performed for a mobile station UE that can support SPS and can support IMS Voice communication.

  On the other hand, the determination unit 22 may be configured to determine that CSFB should be performed for mobile stations UE that can handle other CSFBs.

  The transmission unit 23 is configured to transmit various signals to the radio base station eNB and the mobile station UE.

  For example, the transmission unit 23 is configured to transmit a signal “S1-AP: INITIAL CONTEXT SETUP REQUEST” to the radio base station eNB.

  Further, the transmission unit 23 is configured to transmit signals “ATTACH ACCEPT”, “TRACKING AREA UPDATE ACCEPT”, and the like to the mobile station UE.

  Here, the transmission unit 23 may be configured to notify the mobile station UE of the determination result by a signal “ATTACH ACCEPT” or “TRACKING AREA UPDATE ACCEPT”.

  Hereinafter, an example of the Attach procedure in the mobile communication system according to the first embodiment of the present invention will be described with reference to FIG.

  As illustrated in FIG. 5, in step S1001, the mobile station UE transmits “RACH preamble” to the radio base station eNB. In step S1002, the radio base station eNB sends “ RACH response "is transmitted.

  In step S1003, the mobile station UE transmits “RRC CONNECTION REQUEST” to the radio base station eNB. In step S1004, the radio base station eNB transmits “RRC CONNECTION SETUP” to the mobile station UE. To do.

  In step S1005, the mobile station UE transmits “RRC CONNECTION SETUP COMPLETE” including “ATTACH REQUEST” to the radio base station eNB. In step S1006, the radio base station eNB transmits to the mobility management node MME. , “S1-AP: INITIAL UE MESSAGE” including “ATTACH REQUEST” is transmitted.

  In step S1007, the mobility management node MME transmits “Send Authentication Info” to the subscriber management server apparatus HSS. In step S1008, the subscriber management server apparatus HSS transmits “Send Authentication Info” to the mobility management node MME. Send Authentication Info Ack ".

  In step S1009, the mobility management node MME transmits “AUTHENTICATION REQUEST” to the mobile station UE. In step S1010, the mobile station UE transmits “AUTHENTICATION RESPONSE” to the mobility management node MME.

  In step S1011, the mobility management node MME transmits "SECURITY MODE COMMAND" to the mobile station UE. In step S1012, the mobile station UE transmits "SECURITY MODE COMPLETE" to the mobility management node MME. To do.

  In step S1013, the mobility management node MME transmits “ESM INFORMATION REQUEST” to the mobile station UE, and in step S1014, the mobile station UE transmits “ESM INFORMATION RESPONSE” to the mobility management node MME. To do.

  In step S1015, the mobility management node MME transmits “S1-AP: INITIAL CONTEXT SETUP REQUEST” including “ATTACH ACCEPT” to the radio base station eNB.

  Note that the “ATTACH ACCEPT” includes a determination result as to whether the mobile station UE should perform VoLTE or CSFB.

  Here, when the information element “UE CAPABILITY” is not included in “S1-AP: INITIAL CONTEXT SETUP REQUEST”, the processes of steps S1016 and S1017 are performed.

  The information element “UE CAPABILITY” is an information element that is generated by the RRC (Radio Resource Control) protocol and cannot be decoded by the mobility management node MME.

  That is, the mobility management node MME uses the information element “UE Radio Capability” included in the signal “S1-AP: UE CAPABILITY INFO INDICATION” as the information element “UE CAPABILITY” as “S1-AP: INITIAL CONTEXT SETUP REQUEST”. To be included and sent.

  In step S1016, the radio base station eNB transmits “RRC: UE CAPABILITY ENQUIRY” to the mobile station UE.

  In step S1017, the mobile station UE generates an information element “UE Radio Capability” for notifying the capability of the mobile station UE by the RRC protocol, and the information element “UE Radio Capability” is transmitted to the radio base station eNB. “RRC: UE CAPABILITY INFORMATION” including

  Here, the capability of the mobile station UE includes radio capabilities such as the SPS capability of the mobile station UE.

  In step S1018, the radio base station eNB generates an information element “SPS Capability” for notifying the SPS capability of the mobile station UE using the S1-AP protocol, and generates the information element for the mobility management node MME. A signal “UE CAPABILITY INFO INDICATION” including “SPS Capability” is transmitted.

  In step S1019, the radio base station eNB transmits “SECURITY MODE COMMAND” to the mobile station UE, and in step S1020, transmits “RRC CONNECTION RECONFIGURATION” including the above-mentioned “ATTACH ACCEPT”.

  Here, the mobile station UE manages the determination result included in the received “ATTACH ACCEPT”, and decides whether to perform VoLTE or CSFB when starting voice communication.

  In step S1021, the mobile station UE transmits “SECURITY MODE COMPLETE” to the radio base station eNB, and in step S1022, transmits “RRC CONNECTION RECONFIGRATION COMPLETE”.

  In step S1023, the radio base station eNB transmits “INITIAL CONTENT SETUP RESPONSE” to the mobility management node MME.

  When the mobility management node MME does not hold “UE Radio Capability”, in step S1015, the mobility management node MME transmits “S1-AP: not including“ ATTACH ACCEPT ”to the radio base station eNB. After transmitting “INITIAL CONTEXT SETUP REQUEST” and receiving “S1-AP: INITIAL CONTEXT SETUP RESPONSE” in step S1023, “ATTACH ACCEPT” may be transmitted to the mobile station UE.

  In step S1024, the mobile station UE transmits “ATTACH COMPLETE” to the mobility management node MME.

  According to the mobile communication system of the first embodiment of the present invention, the mobility management node MME is included in the signal “S1-AP: UE CAPABILITY INFO INDICATION” and is generated by the S1-AP protocol. Since the SPS capability of the mobile station UE can be grasped by the element “SPS Capability”, whether the mobile station UE should perform VoLTE or CSFB in consideration of the SPS capability of the mobile station UE Can be judged.

(Modification 1)
Hereinafter, the mobile communication system according to the first modification of the present invention will be described with reference to FIG. 6 and FIG. 7 while focusing on differences from the mobile communication system according to the first embodiment described above.

  As illustrated in FIG. 6, the mobile station UE according to the first modification includes a reception unit 31 and a transmission unit 32.

  The receiving unit 31 is configured to receive various signals transmitted by the radio base station eNB and the mobility management node MME.

  For example, the receiving unit 31 is configured to receive a signal “RRC: UE CAPABILITY ENQUIRY” or the like transmitted by the radio base station eNB.

  The receiving unit 31 is configured to receive signals “ATTACH ACCEPT”, “TRACKING AREA UPDATE ACCEPT”, and the like transmitted by the mobility management node MME.

  The transmission unit 32 is configured to transmit various signals to the radio base station eNB and the mobility management node MME.

  For example, the transmission unit 32 generates an information element “UE Radio Capability” for notifying the capability of the mobile station UE by the RRC protocol, and includes the information element “UE Radio Capability” for the radio base station eNB. “RRC: UE CAPABILITY INFORMATION” is configured to be transmitted.

  Further, as shown in FIG. 7, the transmission unit 32 transmits information elements “Voice domain preference and UE's usage setting”, “UE network capability”, etc. for notifying the SPS capability of the mobile station UE by the NAS protocol. Configured to generate.

  Or the transmission part 32 is comprised so that the information element for notifying the SPS capability of the mobile station UE may be generated as a new information element instead of the existing information element by the NAS protocol.

  The transmission unit 32 is configured to transmit signals “ATTACH REQUEST”, “TRACKING AREA UPDATE ACCEPT”, and the like including the generated information element, to the mobility management node MME.

  Here, the determination unit 22 of the mobility management node MME according to the first modification includes the information element “Voice domain preference and UE's” included in “ATTACH REQUEST REQUEST” or “TRACKING AREA UPDATE REQUEST” received by the reception unit 21. based on information indicating whether or not the mobile station UE is compatible with IMS Voice communication and CSFB based on “usage setting”, “UE network capability”, a new information element, and the like, or whether to perform VoLTE on the mobile station UE, or It is configured to determine whether to perform CSFB.

  According to the mobile communication system according to the first modification of the present invention, the mobility management node MME includes the SPS capability of the mobile station UE by the information element included in the signal “ATTACH REQUEST” and generated by the NAS protocol. Since it can be grasped, the mobile station UE can determine whether to perform VoLTE or CSFB in consideration of the SPS capability of the mobile station UE.

  Here, the signal that allows the mobility management node MME to grasp the SPS capability of the mobile station UE by the information element generated by the NAS protocol may be “TRACKING AREA UPDATE ACCEPT”.

(Modification 2)
Hereinafter, the mobile communication system according to the second modification of the present invention will be described with reference to FIG. 8 while focusing on differences from the mobile communication system according to the first embodiment described above.

  The transmission unit 32 of the mobile station UE according to the second modification generates an information element “UE Radio Capability” for notifying the capability of the mobile station UE including the SPS capability of the mobile station UE by the RRC protocol, “RRC: UE CAPABILITY INFORMATION” including the information element “UE Radio Capability” is transmitted to the station eNB.

  Further, the transmission unit 11 of the radio base station eNB according to the second modification is configured to transmit “S1-APUE CAPABILITY INFO INDICATION” including the information element “UE Radio Capability” to the mobility management node MME. Has been.

  Furthermore, the determination unit 22 of the mobility management node MME according to the second modification decodes the information element “UE Radio Capability” generated by the RRC protocol in the signal “UE CAPABILITY INFO INDICATION” received from the radio base station eNB. It is configured to be able to.

  Further, the determination unit 22 of the mobility management node MME according to the second modification example moves based on the decrypted information element “UE Radio Capability” and information indicating whether the mobile station UE can handle IMS Voice communication and CSFB. The station UE is configured to determine whether to perform VoLTE or CSFB.

  According to the mobile communication system according to the second modification of the present invention, the mobility management node MME is included in the signal “S1-AP: UE CAPABILITY INFO INDICATION”, and the information element “UE Radio” generated by the RRC protocol is used. Since “Capability” can grasp the SPS capability of the mobile station UE, it is determined whether the mobile station UE should perform VoLTE or CSFB in consideration of the SPS capability of the mobile station UE. be able to.

  The characteristics of the present embodiment described above may be expressed as follows.

  The first feature of the present embodiment is that E-UTRAN (a first radio access network that can provide a packet switched service but cannot provide a circuit switched service) and UTRAN (a packet switched service and a circuit switched service can be provided) In a mobile communication system provided with a second radio access network), a mobile communication method in which a mobile station UE performs voice communication, wherein a radio base station eNB in an E-UTRAN uses an S1-AP protocol (mobile with a radio base station) Information element “SPS Capability” for notifying the SPS capability (semi-persistent scheduling capability) indicating whether or not the mobile station UE supports SPS (semi-persistent scheduling) depending on the protocol used between the management nodes) And the radio base station eNB A step of transmitting a signal “UE CAPABILITY INFO INDICATION” including the generated information element “SPS Capability” to the mobility management node MME, and the mobility management node MME includes the information element “SPS Capability” and the IMS of the mobile station UE. Based on information indicating whether voice communication (voice communication using a packet switching service) and CSFB can be supported or not, the mobile station UE is connected to VoLTE (voice communication using a packet switching service in the first radio access network). Or a step of notifying whether CSFB (voice communication using a circuit switching service in the second radio access network) should be performed.

  A second feature of the present embodiment is E-UTRAN and a radio base station eNB used in a mobile communication system equipped with UTRAN, and generates an information element “SPS Capability” by the S1-AP protocol. And a signal “UE CAPABILITY INFO INDICATION” including the generated information element “SPS Capability” is transmitted to the mobility management node MME.

  A third feature of the present embodiment is a mobile communication method in which the mobile station UE performs voice communication in an E-UTRAN and a mobile communication system including the UTRAN. The mobile station UE has a NAS protocol (mobile station). And a step of generating information elements “Voice domain preference and UE's usage setting”, “UE network capability”, etc. for notifying the SPS capability of the mobile station UE by the protocol used between the mobile station and the mobility management node) The mobile station UE sends a signal “ATTACH” including information elements “Voice domain preference and UE's usage setting”, “UE network capability”, and the like to the mobility management node MME. REQUEST ", the mobility management node MME, the information elements" Voice domain preference and UE's usage setting "," UE network capability ", etc. and whether or not the mobile station UE supports IMS Voice communication and CSFB The gist of the invention is that it includes a step of notifying the mobile station UE whether to perform VoLTE or CSFB based on the information shown.

  Here, the signal “ATTACH REQUEST” may be “TRACKING AREA UPDATE ACCEPT”.

  A fourth feature of the present embodiment is a mobile station UE used in a mobile communication system equipped with E-UTRAN and UTRAN, and an information element for notifying the SPS capability of the mobile station UE by the NAS protocol It is configured to generate “Voice domain preference and UE's usage setting”, “UE network capability”, and the like, and the generated information element “Voice domain preference and UE's usage and UE's preference usage UE” The gist is that it is configured to transmit a signal “ATTACH REQUEST” including “setting” and “UE network capability”.

  Here, the signal “ATTACH REQUEST” may be “TRACKING AREA UPDATE ACCEPT”.

  A fifth feature of the present embodiment is a mobile communication method in which a mobile station UE performs voice communication in a mobile communication system including E-UTRAN and UTRAN, and the mobile station UE has an RRC protocol (mobile station). And a radio base station in the first radio access network) generating an information element “UE Radio Capability” for notifying the SPS capability of the mobile station UE, and the mobile station UE A step of transmitting a signal “UE Capability Information” including the generated information element “UE Radio Capability” to the radio base station eNB, and the radio base station eNB to the mobility management node MME Information element “UE Radio Ca for notifying the SPS capability” The process of transmitting a signal “UE CAPABILITY INFO INDICATION” including “ability”, the process of the mobility management node MME decrypting the information element “UE Radio Capability”, and the information element “UE Radio Capability of decryption by the mobility management node MME” ”And information indicating whether or not the mobile station UE is compatible with IMS Voice communication and CSFB, the mobile station UE has a step of notifying whether to perform VoLTE or CSFB. This is the gist.

  A sixth feature of the present embodiment is a mobility management node MME used in a mobile communication system equipped with E-UTRAN and UTRAN, in a signal “UE CAPABILITY INFO INDICATION” received from the radio base station eNB, The information element “UE Radio Capability” generated by the RRC protocol is configured to be decrypted, and the decrypted information element “UE Radio Capability” and the information indicating whether the mobile station UE is compatible with IMS Voice communication and CSFB Based on the above, the gist is that the mobile station UE is configured to notify whether to perform VoLTE or CSFB.

  The operations of the mobility management node MME, the radio base station eNB, and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be a combination of both. May be implemented.

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a Hard Disk, a Registered ROM, a Hard Disk Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the mobility management node MME, the radio base station eNB, or the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the mobility management node MME, the radio base station eNB, or the mobile station UE.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. 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 scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

eNB ... wireless base station MME ... mobility management node UE ... mobile station 11, 21, 32 ... transmission unit 12, 23, 31 ... reception unit 22 ... determination unit 12 ... location information acquisition unit 14 ... transmission unit

Claims (6)

In a mobile communication system comprising a first radio access network that can provide a packet switched service but cannot provide a circuit switched service, and a second radio access network that can provide a packet switched service and a circuit switched service, the mobile station performs voice A mobile communication method for performing communication,
A semi-persistent scheduling capability in which a radio base station in the first radio access network indicates whether or not the mobile station can support semi-persistent scheduling according to a protocol used between the radio base station and a mobility management node. Generating an information element for notifying
The radio base station transmitting a signal including the generated information element to the mobility management node;
Based on information indicating whether the mobile management node can support voice communication using the information element and the packet switching service and circuit switching service of the mobile station, the mobile management node And a step of notifying whether voice communication using a packet switching service should be performed in the access network or whether voice communication using a circuit switching service should be performed in the second radio access network. Communication method. The first radio access network that can provide a packet switching service but cannot provide a circuit switching service, and the first radio access network that includes a second radio access network that can provide a packet switching service and a circuit switching service. A radio base station in a radio access network,
A protocol used between the radio base station and the mobility management node is configured to generate an information element for notifying a semi-persistent scheduling capability indicating whether or not the mobile station can support semi-persistent scheduling. And
A radio base station configured to transmit a signal including the generated information element to the mobility management node. In a mobile communication system comprising a first radio access network that can provide a packet switched service but cannot provide a circuit switched service, and a second radio access network that can provide a packet switched service and a circuit switched service, the mobile station performs voice A mobile communication method for performing communication,
The mobile station generates an information element for notifying the semi-persistent scheduling capability indicating whether or not the mobile station is compatible with semi-persistent scheduling according to a protocol used between the mobile station and a mobility management node. And a process of
The mobile station transmitting a signal including the generated information element to the mobility management node;
Based on information indicating whether the mobile management node can support voice communication using the information element and the packet switching service and circuit switching service of the mobile station, the mobile management node And a step of notifying whether voice communication using a packet switching service should be performed in the access network or whether voice communication using a circuit switching service should be performed in the second radio access network. Communication method. A mobile station used in a mobile communication system including a first radio access network that can provide a packet switched service but cannot provide a circuit switched service, and a second radio access network that can provide a packet switched service and a circuit switched service There,
A protocol used between the mobile station and the mobility management node is configured to generate an information element for notifying the semi-persistent scheduling capability indicating whether or not the mobile station can support semi-persistent scheduling. And
A mobile station configured to transmit a signal including the generated information element to the mobility management node. In a mobile communication system comprising a first radio access network that can provide a packet switched service but cannot provide a circuit switched service, and a second radio access network that can provide a packet switched service and a circuit switched service, the mobile station performs voice A mobile communication method for performing communication,
The mobile station has a semi-persistent scheduling capability indicating whether or not the mobile station can support semi-persistent scheduling according to a protocol used between the mobile station and a radio base station in the first radio access network. Generating an information element for notification;
The mobile station transmitting a signal including the generated information element to the radio base station;
The radio base station transmitting a signal including the information element to a mobility management node;
The mobility management node decrypting the information element;
Based on the decoded information element and information indicating whether the mobile station can support voice communication using the packet switching service and circuit switching service, the mobility management node A step of notifying whether voice communication using a packet switching service should be performed in one radio access network or voice communication using a circuit switching service should be performed in the second radio access network. Mobile communication method. A mobility management node used in a mobile communication system including a first radio access network that can provide a packet switched service but cannot provide a circuit switched service, and a second radio access network that can provide a packet switched service and a circuit switched service Because
In the signal received from the radio base station in the first radio access network, it is shown whether or not the mobile station can cope with the semi-persistent scheduling generated by the protocol used between the mobile station and the radio base station. It is configured to decrypt information elements for reporting semi-persistent scheduling capabilities,
Based on the decoded information element and the information indicating whether the mobile station is compatible with the packet switching service and the voice communication using the packet switching service, the voice using the packet switching service is transmitted to the mobile station. A mobility management node configured to notify whether to perform communication or to perform voice communication using a circuit switching service in the second radio access network.

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