WO2010021324A1 - 移動通信方法、交換局及び無線基地局 - Google Patents
移動通信方法、交換局及び無線基地局 Download PDFInfo
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- WO2010021324A1 WO2010021324A1 PCT/JP2009/064452 JP2009064452W WO2010021324A1 WO 2010021324 A1 WO2010021324 A1 WO 2010021324A1 JP 2009064452 W JP2009064452 W JP 2009064452W WO 2010021324 A1 WO2010021324 A1 WO 2010021324A1
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims description 57
- 238000004891 communication Methods 0.000 claims abstract description 67
- 238000012545 processing Methods 0.000 claims abstract description 64
- 230000008569 process Effects 0.000 claims description 45
- 238000004321 preservation Methods 0.000 claims description 9
- 230000004048 modification Effects 0.000 description 27
- 238000012986 modification Methods 0.000 description 27
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/14—Backbone network devices
Definitions
- the present invention relates to a mobile communication method, an exchange station, and a radio base station.
- the LTE (Long Term Evolution) mobile communication system defined by 3GPP does not provide circuit switched (CS) communication. Therefore, the mobile station UE located in the LTE mobile communication system performs a CSFB (Circuit Switched Fallback) process to make a transition to the WCDMA mobile communication system that provides circuit-switched communication. It is configured to initiate switched communication.
- CSFB Circuit Switched Fallback
- a general mobile communication system can regulate predetermined communication in a predetermined area in order to avoid a system failure due to traffic concentration or the like.
- such a mobile communication system is configured to regulate the circuit-switched communication of the mobile station by detecting a transmission signal for circuit-switched communication transmitted from the mobile station in a predetermined area.
- the present invention has been made in view of the above-described problems, and provides a mobile communication method, an exchange station, and a radio base station that can regulate circuit-switched communication of a mobile station started by CSFB processing. For the purpose.
- a first feature of the present invention is a mobile communication method in which a mobile station establishes a bearer in a core network of a first mobile communication system that does not provide circuit-switched communication in a predetermined area.
- the mobile station in the second mobile communication system When the first process for starting circuit-switched communication is performed and the switching station of the first mobile communication system detects that the service request signal includes second identification information, A step of performing a second process for establishing a bearer of the mobile station in the radio access network of the first mobile communication system, Even if it is detected that the first identification information is included in the service request signal, the circuit switching communication of the mobile station in the second mobile communication system is performed in the predetermined area.
- the gist is that the first process is not performed when it is notified that the control is restricted.
- a second feature of the present invention is a mobile communication method, wherein a mobile station establishes a bearer in a core network of a first mobile communication system that does not provide circuit-switched communication in a predetermined area.
- the mobile station in the second mobile communication system When the first process for starting circuit-switched communication is performed and the switching station of the first mobile communication system detects that the service request signal includes second identification information, A step of performing a second process for establishing a bearer of the mobile station in the radio access network of the first mobile communication system, If the radio base station of the mobile station is notified that the circuit switching communication of the mobile station in the second mobile communication system is restricted in the predetermined area, the switching base station of the first mobile communication system The gist is to stop the first processing when the first processing signal is received.
- a third feature of the present invention is a mobile communication method in a state where a mobile station establishes a bearer in a core network of a first mobile communication system that does not provide circuit-switched communication in a predetermined area. Transmitting a service request signal as a first protocol signal that terminates between the mobile station and the switching center of the first mobile communication system; and in the switching station of the first mobile communication system, the service request signal A first process for the mobile station to start circuit-switched communication in the second mobile communication system when it is detected that the first identification information is included in the second mobile communication system, and the first mobile communication system If it is detected that the service request signal includes the second identification information, the switching center of the first mobile communication system is A second process for establishing a bearer of the mobile station is performed, and the radio base station of the first mobile communication system transmits the first protocol signal and the first protocol signal.
- the second protocol signal that terminates between the mobile station and the radio base station, or the third protocol signal that terminates between the radio base station and the exchange of the first mobile communication system When the first protocol signal, the second protocol signal, or the third protocol signal corresponds to the service request signal including the first identification information, and When it is notified in the predetermined area that the circuit switching communication of the mobile station in the second mobile communication system is restricted, the service is provided to the switching station of the first mobile communication system. And summarized in that not forward demand signal.
- a mobile communication method in which a mobile station establishes a bearer in a core network of a first mobile communication system that does not provide circuit-switched communication in a predetermined area.
- the mobile station in the second mobile communication system when it is detected that the service request signal includes first identification information, the mobile station in the second mobile communication system.
- the radio access network device of the second mobile communication system sends a switching request signal to the second mobile communication system of the mobile station
- the gist is to stop the first process when the message is received.
- a fifth feature of the present invention is a mobile communication method, wherein a mobile station establishes a bearer in a core network of a first mobile communication system that does not provide circuit switched communication in a predetermined area.
- the mobile station in the second mobile communication system
- the first process for starting circuit-switched communication is performed and the switching station of the first mobile communication system detects that the service request signal includes second identification information
- a second process for establishing a bearer of the mobile station in the radio access network of the first mobile communication system and the mobile station
- the second mobile communication system of the mobile station including restriction information indicating that line switching communication of the mobile station in the second mobile communication system is restricted in the second area from the radio access network device of the mobile communication system
- the gist is to stop the first process when a switch request signal is received.
- an exchange station of a first mobile communication system that does not provide circuit-switched communication, and a mobile station in a state where a bearer in a core network of the first mobile communication system is established.
- the mobile station performs a first process for starting circuit-switched communication in the second mobile communication system
- a first processing unit configured as described above, and a bearer of the mobile station in a radio access network of the first mobile communication system when it is detected that the service request signal includes second identification information.
- a second processing unit configured to perform a second process for establishing the first processing unit, wherein the first processing unit includes the first identification information in the service request signal.
- a seventh feature of the present invention is that a mobile station transmits a service request signal including first identification information in a state where a bearer is established in a core network of a first mobile communication system that does not provide circuit-switched communication.
- the switching station of the first mobile communication system receives the service request, the second mobile communication system is configured to perform a first process for the mobile station to start circuit switching communication.
- a radio base station of a first mobile communication system used in a mobile communication system the first protocol signal terminating between the mobile station and the switching center of the first mobile communication system, for the first protocol
- a signal for the second protocol that terminates between the mobile station and the radio base station which is used to transmit a signal, or is terminated between the radio base station and an exchange station of the first mobile communication system.
- An analysis unit configured to receive and analyze the third protocol signal, wherein the analysis unit transmits the first protocol signal and the second protocol transmitted by the mobile station in a predetermined area.
- the service request signal in which the first protocol signal, the second protocol signal, or the third protocol signal includes the first identification information. And when it is notified that circuit switching communication of the mobile station in the second mobile communication system is restricted in the predetermined area, the switching center of the first mobile communication system. In summary, the service request signal is not transferred.
- a mobile communication method As described above, according to the present invention, it is possible to provide a mobile communication method, a switching station, and a radio base station that can regulate the circuit switching communication of a mobile station that is started by CSFB processing.
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 2 is a functional block diagram of the switching center according to the first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention.
- FIG. 4 is a functional block diagram of a radio base station according to Modification 1 of the present invention.
- FIG. 5 is a sequence diagram showing an operation of the mobile communication system according to the first modification of the present invention.
- FIG. 6 is a functional block diagram of a radio base station according to Modification 2 of the present invention.
- FIG. 7 is a sequence diagram showing an operation of the mobile communication system according to the second modification of the present invention.
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 2 is a functional block diagram of the switching center according to the first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing operations of the mobile
- FIG. 8 is a sequence diagram showing operations of the mobile communication system according to the third modification of the present invention.
- FIG. 9 is a functional block diagram of a mobile station according to Modification 4 of the present invention.
- FIG. 10 is a sequence diagram showing operations of the mobile communication system according to the fourth modification of the present invention.
- the mobile communication system includes a gateway apparatus PDN-GW, a serving gateway apparatus S-GW # 1 of an LTE mobile communication system (first mobile communication system), and an LTE system.
- Mobile communication system MME Mobility Management Entity
- LTE mobile communication system radio base station eNB LTE mobile communication system radio base station eNB
- WCDMA mobile communication system second mobile communication system serving gateway device S-GW # 2
- WCDMA mobile communication system switching center packet switching communication switch SGSN and circuit switching communication switching system MSC
- WCDMA mobile communication system radio access network device radio controller RNC and radio base station eNB
- a tracking area TA # 1 under the LTE mobile communication system and a location area LA # 1 under the WCDMA mobile communication system partially overlap.
- CS communication is not provided in the LTE mobile communication system, and CS communication is provided in the WCDMA mobile communication system.
- the mobile station UE located in the LTE mobile communication system is always in a state of establishing a bearer in the core network of the LTE mobile communication system.
- the mobile station UE in the tracking area TA # 1 performs CSFB processing to start CS communication in the location area LA # 1 under the WCDMA mobile communication system. explain.
- the switching center MME includes a regulation information management unit 11, a Service Request reception unit 12, a determination unit 13, a CSFB processing unit 14, and a Preservation return processing unit 15.
- the restriction information management unit 11 is configured to manage restriction information in the LTE mobile communication system and restriction information in the WCDMA mobile communication system.
- the restriction information in the WCDMA mobile communication system indicates that the CS communication (only transmission or transmission and reception) of the mobile station UE in the WCDMA mobile communication system is restricted in a predetermined area. .
- the restriction information management unit 11 is configured to periodically notify restriction information in the WCDMA mobile communication system from a predetermined device of the WCDMA mobile communication system.
- the Service Request receiving unit 12 is configured to receive a “Service Request (service request signal)” transmitted by the mobile station UE residing in the LTE mobile communication system.
- Service Request is a NAS protocol signal (first protocol signal terminated between the mobile station UE and the switching center MME).
- “Service Request” including the first identification information is a “Service Request” for CSFB processing, and “Service Request” including the second identification information is a “Service Request” for Preservation restoration processing.
- the determination unit 13 determines that the “Service Request” is used for the CSFB process. It is configured to determine whether it is “Service Request” or “Service Request” for Preservation restoration processing.
- the CSFB processing unit 14 performs CSFB processing for the mobile station UE to start CS communication in the WCDMA mobile communication system when it is detected that the first identification information is included in the above-mentioned “Service Request”. It is configured to perform (first processing).
- the CSFB processing unit 14 is configured to transmit “S1 Initial UE Context Setup” to the radio base station eNB as a CSFB processing signal.
- the CSFB processing unit 14 moves in the WCDMA system in the location area LA # 1 (predetermined area) even when it is detected that the “Service Request” includes the first identification information.
- the restriction information indicating that the CS communication of the mobile station UE in the communication system is restricted is managed by the restriction information management unit 11, the CSFB process is not performed.
- the Preservation return processing unit 15 establishes the bearer of the mobile station UE in the radio access network of the LTE mobile communication system when it is detected that the second service information is included in the “Service Request” described above. Preservation return processing (second processing) is performed.
- step S1001 the mobile station UE in the tracking area TA # 1 (predetermined area) establishes a bearer in the core network of the LTE mobile communication system, and the first identification information Send "Service Request" containing
- step S1002 the switching center MME restricts CS communication of the mobile station UE in the WCDMA mobile communication system in an area (predetermined area) corresponding to the tracking area TA # 1 in the location area LA # 1. Since the notification is made, the CSFB process is not started even if it is detected that the first identification information is included in the “Service Request”.
- the LTE switching center MME determines whether or not to perform CSFB processing in consideration of restriction information in the WCDMA mobile communication system. Therefore, in the WCDMA mobile communication system, the CS communication of the mobile station UE started by the CSFB process can be regulated.
- Modification 1 With reference to FIG.4 and FIG.5, the mobile communication system which concerns on the modification 1 of this invention is demonstrated.
- the mobile communication system according to the first modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.
- the radio base station eNB includes a regulation information management unit 21 and a CSFB processing unit 22.
- the regulation information management unit 21 has the same function as the regulation information management unit 11 of the exchange MME shown in FIG.
- the CSFB processing unit 22 is configured to perform CSFB processing when “S1 Initial UE Context Setup” is received as a CSFB processing signal from the exchange MME.
- CSFB processing unit 22 receives “S1 Initial UE Context Setup”, CS communication of mobile station UE in the WCDMA mobile communication system is restricted in location area LA # 1 (predetermined area).
- LA # 1 predetermined area
- step S2001 the mobile station UE in the tracking area TA # 1 (predetermined area) establishes a bearer in the core network of the LTE mobile communication system, and the first identification information Send "Service Request" containing
- step S2002 the switching center MME detects that the first identification information is included in the “Service Request” described above, and transmits “S1 Initial UE Context” to the radio base station eNB as a CSFB processing signal. Send “Setup”.
- step S2003 the radio base station eNB restricts CS communication of the mobile station UE in the WCDMA mobile communication system in an area (predetermined area) corresponding to the tracking area TA # 1 in the location area LA # 1. Has been notified, the CSFB process is stopped.
- the LTE radio base station eNB can determine whether to continue the CSFB process in consideration of the restriction information in the WCDMA mobile communication system.
- the CS communication of the mobile station UE started by the CSFB process can be regulated.
- Modification 2 With reference to FIG.6 and FIG.7, the mobile communication system which concerns on the modification 2 of this invention is demonstrated.
- the mobile communication system according to the second modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.
- the radio base station eNB includes a regulation information management unit 31, an AS processing / analysis unit 32, and a NAS analysis unit 33.
- the regulation information management unit 31 has the same function as the regulation information management unit 11 of the exchange MME shown in FIG.
- the AS processing / analysis unit 32 is configured to perform processing related to an AS (Access Stratum) protocol (second protocol) terminated with the mobile station UE.
- AS Access Stratum
- second protocol second protocol
- the NAS analysis unit 33 is configured to receive and analyze a signal for a NAS (Non Access Stratum) protocol (first protocol) that terminates between the mobile station UE and the switching center MME.
- NAS Non Access Stratum
- first protocol first protocol
- the NAS analyzing unit 33 includes the first identification information.
- the area corresponding to “Service Request” and in the area (predetermined area) corresponding to the tracking area TA # 1 there is restriction information indicating that CS communication of the mobile station UE in the WCDMA mobile communication system is restricted.
- the “Service Request” is not transferred to the exchange MME.
- the AS processing / analysis unit 32 receiving and analyzing the AS protocol signal transmitted by the mobile station UE in the tracking area TA # 1 (predetermined area), the AS protocol signal is converted into the first identification information.
- a restriction indicating that CS communication of the mobile station UE in the WCDMA mobile communication system is restricted in an area (predetermined area) corresponding to the tracking area TA # 1 in the case of "Service Request" including
- the NAS analysis unit 33 may be configured not to transfer the “Service Request” to the exchange MME.
- the mobile station UE uses the first identification information transmitted by the mobile station UE in the tracking area TA # 1 (predetermined area) as a third protocol signal that terminates between the exchange MME and the radio base station eNB. Restriction information indicating that CS communication of the mobile station UE in the WCDMA mobile communication system is restricted in an area (predetermined area) corresponding to the tracking area TA # 1 when it corresponds to the “Service Request” included. May be configured not to transfer the “Service Request” to the switching center MME.
- step S3001 the mobile station UE in the tracking area TA # 1 (predetermined area) establishes a bearer in the core network of the LTE mobile communication system, and the first identification information Send "Service Request" containing Alternatively, in step S3001, the mobile station UE in the tracking area TA # 1 (predetermined area) may set and transmit the first identification information in the AS protocol signal for transmitting “Service Request”.
- the radio base station eNB receives and analyzes the NAS protocol signal transmitted by the mobile station UE, and detects “Service Request” including the first identification information.
- the radio base station eNB receives the AS protocol signal transmitted by the mobile station UE, and acquires the first identification information set in the AS protocol signal.
- the radio base station eNB is notified that the CS communication of the mobile station UE in the WCDMA mobile communication system is restricted in the area (predetermined area) corresponding to the tracking area TA # 1, The “Service Request” is not transferred to the station MME.
- the radio base station eNB and the LTE radio base station eNB consider the restriction information in the WCDMA mobile communication system and include “Service Request” including the first identification information. "Service Request" for CSFB from the restricted mobile station UE in the WCDMA mobile communication system reaches the switching center MME. And CSFB processing is not performed. As a result, in the WCDMA mobile communication system, the CS communication of the mobile station UE started by the CSFB process can be regulated.
- Modification 3 With reference to FIG. 8, a mobile communication system according to Modification 3 of the present invention is described. Hereinafter, the mobile communication system according to the third modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.
- the mobile station UE establishes bearers in the core network and radio access network of the LTE mobile communication system in the tracking area TA # 1 (predetermined area), that is, the LTE scheme.
- TA # 1 predetermined area
- “Service Request” including the first identification information is transmitted in step S4000A.
- step S4000B the switching center MME detects that the first “Service Request” includes the first identification information, and transmits “S1 Initial UE Context” to the radio base station eNB as a CSFB processing signal. Send “Setup”.
- step S4001 the radio base station eNB performs handover processing from a cell under the LTE mobile communication system to a cell under the WCDMA mobile communication system for the mobile station UE in accordance with the received “S1 Initial UE Context Setup”. Decide to do.
- step S4002 the radio base station eNB transmits “Handover Required (handover request signal)” to the switching center MME.
- the “Handover Required” includes specific information indicating that it is a handover processing signal in the CSFB processing.
- step S4003 the switching center MME transmits “Forward Relocation Request” to the switching center SGSN.
- the “Forward Relocation Request” includes specific information indicating that it is a handover processing signal in the CSFB processing.
- step S4004 the switching center SGSN transmits “Create PDP Context Request” to the serving gateway apparatus S-GW # 2, and in step S4005, the serving gateway apparatus S-GW # 2 transmits to the switching center SGSN. Then, “Create PDP Context Response” is transmitted.
- step S4006 the switching center SGSN transmits “Relocation Request (switching request signal to the mobile communication system of the WCDMA scheme of the mobile station UE)” to the radio network controller RNC.
- the “Relocation Request” includes specific information indicating that it is a handover processing signal in the CSFB processing.
- the radio control apparatus RNC Since the CS communication of the mobile station UE in the WCDMA mobile communication system is restricted in the area (predetermined area) corresponding to the tracking area TA # 1, in step S4007, the radio control apparatus RNC performs “Relocation” including specific information. When the “Request” is received, the above-described CSFB process is stopped.
- the radio network controller RNC when the radio network controller RNC receives “Relocation Request” including specific information, it is configured to cancel the above-described CSFB processing, and thus WCDMA.
- the radio network controller RNC receives “Relocation Request” including specific information, it is configured to cancel the above-described CSFB processing, and thus WCDMA.
- it is possible to regulate the CS communication of the mobile station UE started by the CSFB process.
- Modification 4 With reference to FIG.9 and FIG.10, the mobile communication system which concerns on the modification 4 of this invention is demonstrated.
- the mobile communication system according to the fourth modification will be described with a focus on differences from the mobile communication system according to the first embodiment described above.
- the mobile station UE includes a CSFB processing unit 41 and a determination unit 42.
- the determination unit 42 uses the “HO from E-UTRAN Command (switching request signal to the mobile communication system of the mobile station UE to the WCDMA mobile communication system)” received by the CSFB processing unit 41 as the CSFB processing signal. Whether or not the area (predetermined area) corresponding to the tracking area TA # 1 in the area includes restriction information indicating that the CS communication of the mobile station UE in the WCDMA mobile communication system is restricted. It is configured to determine.
- the CSFB processing unit 41 is configured to perform the above-described CSFB processing.
- the CSFB processing unit 41 stops the CSFB processing when the determining unit 42 determines that the above-described restriction information is included in the “HO from E-UTRAN Command” received by the CSFB processing unit 41. Is configured to do.
- steps S5000A through S5006 are the same as the operations in steps S4000A through S4006 shown in FIG.
- step S5007 the radio network controller RNC transmits “Relocation Request Acknowledge” including the above-described restriction information to the switching center SGSN.
- step S5008 the switching center SGSN transmits “Create PDP Context Request” to the serving gateway apparatus S-GW # 2, and in step S5009, the serving gateway apparatus S-GW # 2 transmits to the switching center SGSN. Then, “Create PDP Context Response” is transmitted.
- step S5010 switching center SGSN transmits “Forward Relocation Response” including the above-described restriction information to switching center MME.
- step S5011 the switching center MME transmits “Create Bearer Request” to the serving gateway apparatus S-GW # 1, and in step S5012, the serving gateway apparatus S-GW # 1 transmits to the switching center MME. Send “Create Bearer Response”.
- step S5013 the switching center MME transmits a “Handover Command (handover instruction signal)” including the above-described restriction information to the radio base station eNB.
- step S5014 the radio base station eNB transmits “HO from E-UTRAN Command” including the above-described restriction information to the mobile station UE.
- step S5015 the mobile station UE determines that the received “HO from E-UTRAN Command” includes the above-described restriction information, and stops the CSFB process.
- the restriction information given to the “Relocation Request Acknowledge” by the radio network controller RNC (the area corresponding to the tracking area TA # 1 where the mobile station UE is located (predetermined) Area)) is notified to the mobile station UE) that the CS communication of the mobile station UE in the WCDMA mobile communication system is restricted, and the mobile station UE is based on the restriction information described above. Therefore, the CS communication of the mobile station UE started by the CSFB process can be restricted in the WCDMA mobile communication system.
- the operations of the radio base station eNB, the mobile station UE, and the switching center MME described above may be performed by hardware, may be performed by a software module executed by a processor, or may be performed by a combination of both. May be.
- Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.
- the 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. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB, the mobile station UE, or the exchange MME. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB, the mobile station UE, or the exchange MME.
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Abstract
Description
図1乃至図3を参照して、本発明の第1の実施形態に係る移動通信システムの構成について説明する。
図4及び図5を参照して、本発明の変更例1に係る移動通信システムについて説明する。以下、本変更例1に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
図6及び図7を参照して、本発明の変更例2に係る移動通信システムについて説明する。以下、本変更例2に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
図8を参照して、本発明の変更例3に係る移動通信システムについて説明する。以下、本変更例3に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
図9及び図10を参照して、本発明の変更例4に係る移動通信システムについて説明する。以下、本変更例4に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
Claims (6)
- 所定エリアにおいて、移動局が、回線交換通信を提供していない第1移動通信システムのコアネットワークにおけるベアラを確立している状態で、サービス要求信号を送信する工程と、
前記第1移動通信システムの交換局において、前記サービス要求信号に第1識別情報が含まれていることが検知された場合、第2移動通信システムで前記移動局が回線交換通信を開始するための第1処理が行われる工程と、
前記第1移動通信システムの交換局において、前記サービス要求信号に第2識別情報が含まれていることが検知された場合、該第1移動通信システムの無線アクセスネットワークにおける前記移動局のベアラを確立するための第2処理が行われる工程とを有し、
前記第1移動通信システムの交換局において、前記サービス要求信号に前記第1識別情報が含まれていることが検知された場合であっても、前記所定エリアでは前記第2移動通信システムにおける前記移動局の回線交換通信が規制されている場合には、前記第1処理は行われないことを特徴とする移動通信方法。 - 前記第1識別情報が含まれているサービス要求信号は、CSFB(Circuit Switched Fallback)処理用の「Service Reqest」であり、
前記第2識別情報が含まれているサービス要求信号は、Preservation復帰処理用の「Service Reqest」であり、
前記第1処理は、CSFB処理であり、
前記第2処理は、Preservation復帰処理であることを特徴とする請求項1に記載の移動通信方法。 - 前記第1移動通信システムの交換局において、前記サービス要求信号に前記第1識別情報が含まれていることが検知された場合であっても、前記所定エリアでは前記第2移動通信システムにおける前記移動局の回線交換通信が規制されている場合には、前記第1移動通信システムの交換局が、前記第1処理の開始を拒絶することを特徴とする請求項1又は2に記載の移動通信方法。
- 回線交換通信を提供していない第1移動通信システムの交換局であって、
前記第1移動通信システムのコアネットワークにおけるベアラを確立している状態の移動局によって所定エリアにおいて送信されたサービス要求信号に、第1識別情報が含まれていることが検知された場合、第2移動通信システムで前記移動局が回線交換通信を開始するための第1処理を行うように構成されている第1処理部と、
前記サービス要求信号に、第2識別情報が含まれていることが検知された場合、前記第1移動通信システムの無線アクセスネットワークにおける前記移動局のベアラを確立するための第2処理を行うように構成されている第2処理部とを具備し、
前記第1処理部は、前記サービス要求信号に前記第1識別情報が含まれていることが検知された場合であっても、前記所定エリアでは前記第2移動通信システムにおける前記移動局の回線交換通信が規制されている場合には、前記第1処理を行わないように構成されていることを特徴とする交換局。 - 前記第1識別情報が含まれているサービス要求信号は、CSFB(Circuit Switched Fallback)処理用の「Service Reqest」であり、
前記第2識別情報が含まれているサービス要求信号は、Preservation復帰処理用の「Service Reqest」であり、
前記第1処理は、CSFB処理であり、
前記第2処理は、Preservation復帰処理であることを特徴とする請求項4に記載の交換局。 - 前記第1処理部は、前記サービス要求信号に前記第1識別情報が含まれていることが検知された場合であっても、前記所定エリアでは前記第2移動通信システムにおける前記移動局の回線交換通信が規制されている場合には、前記第1処理の開始を拒絶するように構成されていることを特徴とする請求項4又は5に記載の交換局。
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