WO2011019059A1 - 移動通信システム - Google Patents
移動通信システム Download PDFInfo
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- WO2011019059A1 WO2011019059A1 PCT/JP2010/063654 JP2010063654W WO2011019059A1 WO 2011019059 A1 WO2011019059 A1 WO 2011019059A1 JP 2010063654 W JP2010063654 W JP 2010063654W WO 2011019059 A1 WO2011019059 A1 WO 2011019059A1
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- Prior art keywords
- node
- mobile station
- communication
- voip
- bearer
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 62
- 238000004891 communication Methods 0.000 claims abstract description 174
- 238000000034 method Methods 0.000 claims description 43
- 238000012986 modification Methods 0.000 description 31
- 230000004048 modification Effects 0.000 description 31
- 230000008569 process Effects 0.000 description 27
- 230000004044 response Effects 0.000 description 22
- 238000005266 casting Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 12
- 238000012546 transfer Methods 0.000 description 11
- 238000012545 processing Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/104—Signalling gateways in the network
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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
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
Definitions
- the present invention relates to a mobile communication system.
- the mobile station UE # 1 performs voice communication (VoIP communication) with the mobile station UE # 2 via the LTE radio access system ( The first communication state) is changed to a state (second communication state) in which the mobile station UE # 1 performs voice communication (circuit switching communication) with the mobile station UE # 2 via the 2G / 3G wireless access system.
- the operation for switching that is, the operation for realizing the “SRVCC (Single Radio Voice Call Continuity)” defined in Non-Patent Document 1 will be described.
- Step 1 in FIG. 25 the LTE wireless access system (Source E-UTRAN) is connected to an extended MSC / MGW (Enhanced MSC Server MediaSRV) via a node MME (Mobility Management Entity, Source MME). Then, a switching preparation instruction for voice communication of the mobile station UE # 1 is transmitted (steps 3 to 5a in FIG. 26).
- LTE wireless access system Source E-UTRAN
- MSC / MGW Enhanced MSC Server MediaSRV
- Source MME Mobility Management Entity
- the extended MSC / MGW provides resources for circuit switching communication to the switching center MSC (Mobile-service Switching Center, Target MSC) and the 2G / 3G wireless access system (Target RNC / BSS).
- the switching center MSC Mobile-service Switching Center, Target MSC
- the 2G / 3G wireless access system Target RNC / BSS
- a preparation instruction a resource for voice communication (circuit-switched communication) for the mobile station UE # 1 is prepared in a section between the extended MSC / MGW and the switching destination 2G / 3G wireless access system ( Steps 5b, 5c, 8a, 8b, 8c in FIG.
- step 3a in FIG. 25 the extended MSC / MGW is connected to the node SCC AS (Service Centralization and Continuity Application Server) located in the home network of the mobile station UE # 1 in the IMS (IP Multimedia Subsystem).
- a path switching request for the media signal and the VoIP control signal is transmitted (step 9 in FIG. 26), and the node SCC AS transmits a path switching request for the VoIP media signal to the mobile station UE # 2.
- step 3b in FIG. 25 the extended MSC / MGW notifies the LTE radio access system that the above-described preparation for switching has been made, and thereby provides the mobile station UE # 1 with LTE.
- An instruction to switch from the wireless access system of the system to the 2G / 3G wireless access system is transmitted (steps 12 to 14 in FIG. 26).
- the VoIP media signal is transmitted between the mobile station UE # 1 and the mobile station UE # 2 via the LTE radio access system, the node S-GW (Serving-Gateway), and the node P-GW (PDN-Gateway). Is switched from the state (first communication state) transmitted / received between the mobile stations UE # 2 to the state (second communication state) transmitted / received between the extended MSC / MGW.
- a VoIP control signal (SIP signal) is transmitted and received between the mobile station UE # 1 and the mobile station UE # 2 via the LTE radio access system, the node S-GW, the node P-GW, and the IMS. Is switched to the state (second communication state) transmitted / received between the extended MSC / MGW and the mobile station UE # 2 via the IMS.
- circuit switching signal a signal in the circuit switching communication including the circuit switching data and the control signal is transmitted via the 2G / 3G wireless access system.
- the extended MSC / MGW is configured to convert a circuit switching signal and a combination of a VoIP media signal and a VoIP control signal.
- the U plane data (hereinafter referred to as “packet signal”) other than the VoIP media signal and the VoIP control signal described above is transmitted to the mobile station via the LTE radio access system, the node S-GW, and the node P-GW. From the state (first communication state) transmitted and received between the UE # 1 and the packet communication network, the mobile station UE # 1 via the 2G / 3G wireless access system, the node S-GW, and the node P-GW And a state (second communication state) in which data is transmitted / received to / from the packet communication network.
- packet signal The U plane data (hereinafter referred to as “packet signal”) other than the VoIP media signal and the VoIP control signal described above is transmitted to the mobile station via the LTE radio access system, the node S-GW, and the node P-GW. From the state (first communication state) transmitted and received between the UE # 1 and the packet communication network, the mobile station UE # 1 via the 2G / 3G wireless access system, the node S-GW
- the mobile station UE # 2 that is the communication partner of the mobile station UE # 1 is requested to switch the route and move Since the route is switched in the station UE # 2, there is a problem that when the mobile station UE # 1 and the mobile station UE # 2 are in different networks, the time required for switching becomes long. .
- the path switching process in the mobile station UE # 1 and the path switching process in the mobile station UE # 2 are performed in parallel. Therefore, the path switching process in the mobile station UE # 1 is performed first. Even if completed, until the path switching process in the mobile station UE # 2 is completed, there is a state in which voice communication cannot be performed between the mobile station UE # 1 and the mobile station UE # 2 (steps 9 to 16 in FIG. 26). This causes a problem that a handover delay is caused.
- the above-described mobile communication system has a problem that switching from the second communication state to the first communication state cannot be performed.
- An object of the present invention is to provide a mobile communication system that realizes a possible SRVCC and solves the problems of conventional mobile communication systems.
- the first feature of the present invention is to support a wireless access system of a first communication system that does not support circuit switched communication, a mobile transmission network that accommodates the wireless access system of the first communication system, and circuit switched communication.
- a second communication system radio access system a second communication system core network accommodating the second communication system radio access system, and a service control network.
- a mobile communication system configured to be able to switch between communication states, wherein in the first communication state, the first mobile station is located in the radio access system of the first communication method, Voice communication is performed with a second mobile station, and a VoIP media signal is transmitted between the first mobile station and the second mobile station.
- VoIP control signals are transmitted / received via the wireless access system of the communication system and the serving gateway device arranged in the visited network of the first mobile station in the mobile transmission network, and the VoIP control signal of the first communication system
- a radio access system, the serving gateway device, and the service control network are configured to be transmitted and received, and in the second communication state, the first mobile station is a radio access system of the second communication scheme. And is configured to perform voice communication with the second mobile station, and a circuit-switched signal is transmitted to the first mobile station via the radio access system of the second communication method.
- the VoIP media signal is transmitted / received to / from the gateway device arranged in the core network of the second communication method, A VoIP control signal is transmitted and received between the second mobile station and the gateway device via a serving gateway device, and the VoIP control signal is transmitted between the gateway device and the second mobile station via the serving gateway device and the service control network.
- the gateway device is configured to convert the circuit-switched signal and the combination of the VoIP media signal and the VoIP control signal.
- a radio access system of a first communication system that does not support circuit switched communication, a mobile transmission network that accommodates the radio access system of the first communication system, and circuit switched communication are supported.
- a second communication system radio access system a second communication system core network accommodating the second communication system radio access system, and a service control network.
- a mobile communication system configured to be able to switch between communication states, wherein in the first communication state, the first mobile station is located in the radio access system of the first communication method, Voice communication is performed with a second mobile station, and a VoIP media signal is transmitted between the first mobile station and the second mobile station.
- a VoIP control signal is transmitted and received via a wireless access system of the communication system and a serving gateway device arranged in the visited network of the first mobile station in the mobile transmission network, and the wireless access of the first communication system
- the first mobile station is present in the radio access system of the second communication method.
- the system is configured to transmit and receive via the system, the serving gateway device, and the service control network. And is configured to perform voice communication with the second mobile station, and a circuit-switched signal is transmitted to the first mobile station and the serving via the radio access system of the second communication method.
- VoIP media signals are transmitted to and received from the gateway device, and the second mobile station and the serving gateway device VoIP control signals are transmitted and received between the first mobile station and the second mobile station via the radio access system of the second communication method, the serving gateway device, and the service control network.
- the serving gateway device is configured to convert the circuit switching signal and the VoIP media signal.
- SRVCC is realized that is capable of continuing voice communication even when the mobile station UE # 1 is closed to the visited network and switching between the first communication state and the second communication state.
- a mobile communication system that can solve the problems of the conventional mobile communication system can be provided.
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing an operation of the mobile communication system according to the first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing an operation of the mobile communication system according to the first embodiment of the present invention. It is a figure which shows the operation
- FIG. 3 is a sequence diagram showing an operation of the mobile communication system according to the first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing an operation of the mobile communication system according to the first embodiment of the present invention. It is a whole block diagram of the mobile communication system which concerns on the modification 1 of this invention. It is a sequence diagram which shows operation
- Mobile communication system according to the first embodiment of the present invention A mobile communication system according to a first embodiment of the present invention will be described with reference to FIG. 1 to FIG.
- the mobile communication system includes an LTE radio access system, a 2G / 3G radio access system, a mobile transmission network, a 2G / 3G core network, a service, A control network and a packet communication network are provided.
- a radio base station eNodeB (not shown) is arranged in the LTE radio access system, and a radio base station NodeB (BSS) (not shown) and a radio network controller are provided in the 2G / 3G radio access system.
- An RNC (not shown) is arranged.
- a node MME In the mobile transmission network, a node MME, a node S-GW (serving gateway device), and a node P-GW are arranged.
- the node MME and the node S-GW are arranged in the visited network of the mobile station UE # 1
- the node P-GW is arranged in the home network of the mobile station UE # 1.
- a node MSC circuit switching office
- a node SGSN packet switching office
- an extended MSC / MGW gateway node
- the node MSC, the node SGSN, and the extended MSC / MGW are arranged in the visited network of the mobile station UE # 1.
- a node P-CSCF Proxy-Call Session Control Function
- a node S-CSCF Server-Call Session Control Function
- a node S / P-CSCF node SCC AS
- a VoIP media signal, a VoIP control signal, and a packet signal are transmitted and received as U plane data related to the mobile station UE # 1.
- the mobile communication system includes a state (first communication state) in which the mobile station UE # 1 performs voice communication (VoIP communication) with the mobile station UE # 2 via the LTE wireless access system.
- the mobile station UE # 1 (first mobile station) is located in the LTE radio access system.
- the mobile station UE # 2 (second mobile station) is configured to perform voice communication.
- a VoIP media signal is transmitted and received between the mobile station UE # 1 and the mobile station UE # 2 via the LTE radio access system, the node S-GW, and the node P-GW.
- the VoIP control signal is transmitted / received via the LTE wireless access system, the node S-GW, the node P-GW, and the IMS.
- packet signals are transmitted and received between the mobile station UE # 1 and the packet communication network via the LTE radio access system, the node S-GW, and the node P-GW. It is configured.
- the mobile station UE # 1 is located in the 2G / 3G wireless access system, and is configured to perform voice communication with the mobile station UE # 2.
- a 2G / 3G system line switching signal is transmitted and received between the mobile station UE # 1 and the extended MSC / MGW via the 2G / 3G system radio access system, and the VoIP media signal is transmitted.
- the VoIP media signal is transmitted.
- the VoIP control signal is transmitted via the node S-GW, the node P-GW, and the IMS.
- transmission / reception is performed between the extended MSC / MGW and the mobile station UE # 2.
- the packet signal is transmitted between the mobile station UE # 1 and the packet communication network via the 2G / 3G wireless access system, the node SGSN, the node S-GW, and the node P-GW. Are configured to be transmitted and received.
- the extended MSC / MGW is configured to convert a 2G / 3G system circuit switching signal (a combination of a voice format and a control signal) and a combination of a VoIP media signal and a VoIP control signal.
- the U plane data including the VoIP media signal, the VoIP control signal, and the packet signal moves via the radio base station eNodeB and the node S-GW. Transmission / reception is performed between the station UE # 1 and the node P-GW.
- Step S1001 when the handover process from the LTE radio access system of the mobile station UE # 1 to the 2G / 3G radio access system is started between the mobile station UE # 1 and the radio base station eNodeB, In step S1002, the radio base station eNodeB transmits “Handover Required” to the node MME.
- step S1003 the node MME determines whether or not the mobile station UE has SRVCC capability and whether or not the node S-GW has a predetermined capability (capability of the present invention). To do.
- the predetermined ability is “the ability to start Bi-casting, which will be described later when a predetermined trigger is detected”, or “Bi when receiving uplink U-plane data via the switching-destination radio access system”. -Ability to start casting "and the like.
- the node MME determines that the mobile station UE has the SRVCC capability and the node S-GW has the predetermined capability, in step S1004, the node MME sends the IP of the node S-GW to the node SGSN. Send "Forward Relocation Request" including address and TEID (Tunnel Endpoint Identifier).
- step S1005 the node SGSN transmits “Relocation Request” including the IP address and TEID of the node S-GW to the radio network controller RNC, and in step S1006, the radio network controller RNC transmits to the node SGSN. On the other hand, “Relocation Request Acknowledge” is transmitted.
- step S1007 the node SGSN transmits “Forward Relocation Response” addressed to the node S-GW to the node MME.
- steps S1004 to S1007 are operations related to the handover process for the packet signal. That is, the handover process (switching process) for the packet signal related to the mobile station UE # 1 is performed via the node SGSN.
- step S1008 the node MME transmits “PS to CS Request” including the IP address and TEID of the node S-GW to the extended MSC / MGW.
- step S1009 the extended MSC / MGW performs radio channel control.
- “Rel / HO Request” including the IP address and TEID of the extended MSC / MGW is transmitted to the station RNC.
- step S1010 the radio network controller RNC transmits the “Rel / HO Request” to the extended MSC / MGW. Ack "is transmitted.
- the extended MSC / MGW is configured to specify an IP address on the extended MSC / MGW side for identifying a bearer (a bearer for VoIP communication) used for transferring a VoIP media signal and a VoIP control signal for the mobile station UE # 1.
- the TEID is assigned, and “PS to CS Response” including bearer information including the IP address and TEID of the assigned extended MSC / MGW side is transmitted to the node MME.
- step S1013 the node MME transmits “Modify Bearer Request” for setting the above-described bearer information to the node S-GW.
- step S1014 the node S-GW transmits to the node MME, Send “Modify Bearer Response”.
- step S1013 “Modify Bearer Request” is transmitted from the extended MSC / MGW to the node S-GW.
- step S1014 “Modify Bearer Response” is transmitted from the node S-GW to the extended MSC / MGW. Also good.
- the node S-GW transmits the downlink VoIP media signal and the VoIP control signal to the radio base station eNodeB and to the radio network controller RNC via the extended MSC / MGW and the node MSC. (Ie, “Bi-casting”).
- step S1021 the node MME excludes the VoIP bearer signal and the VoIP control signal from being transferred to the node SGSN, and transmits “Handover Command” to the radio base station eNodeB in step S1022.
- step S1024 the radio base station eNodeB transmits “HO from E-UTRAN Command” to the mobile station UE # 1.
- step S1025 a procedure for establishing a radio access link between the mobile station UE # 1 and the radio network controller RNC is performed.
- step S1026 the mobile station UE # 1 transmits to the radio network controller RNC, “Handover to UTRAN Complete” is transmitted, and in step S1027, the mobile station UE # 1 can transmit uplink U-plane data to the radio network controller RNC.
- the radio base station eNodeB when the radio base station eNodeB receives downlink U-plane data in step S1028, if “Direct Forwarding” is applied, the radio base station eNodeB converts the downlink U-plane data to radio channel control. Forward to station RNC.
- the radio base station eNodeB receives the downlink U plane data in step S1028, if “Indirect Forwarding” is applied, the radio base station eNodeB transmits the downlink U plane data via the node S-GW. Transfer to the radio network controller RNC.
- “Direct Tunnel” when “Direct Tunnel” is not used, the radio base station eNodeB transfers from the node S-GW to the radio network controller RNC via the node SGSN.
- step S10281 the radio network controller RNC transmits “Reloc / HO Complete” to the extended MSC / MGW.
- step S10282 the “PS to CS Complete / between the node MME and the extended MSC / MGW is transmitted. Ack "is transmitted and received.
- step S10283 the VoIP media signal and the VoIP control signal are transmitted / received between the node P-GW and the extended MSC / MGW via the node S-GW, and the circuit switching signal moves via the radio network controller RNC. Switching is performed between the station UE # 1 and the extended MSC / MGW.
- the extended MSC / MGW performs codec conversion (RTP / AMR-lu-UP / AMR) between the circuit switched signal and the combination of the VoIP media signal and the VoIP control signal.
- the node S-GW when the node S-GW receives the uplink VoIP media signal or the VoIP control signal, the node S-GW stops the above-described Bi-casting, that is, the transfer of the VoIP media signal or the VoIP control signal for the radio base station eNB. To stop.
- step S1029 the radio network controller RNC transmits “Relocation Complete” to the node SGSN.
- step S1030 the node SGSN transmits “Forward Relocation Complete” to the node MME, and in step S1031, the node MME transmits “Forward Relocation Complete Acknowledge” to the node SGSN.
- step S1032 the node MME transmits “Modify Bearer Request” to the node S-GW.
- the node S-GW changes the bearer information according to the received “Modify Bearer Request”, separates the VoIP media signal, the VoIP control signal, and the packet signal, and changes the transfer destination.
- step S1033 the node S-GW transmits “Modify Bearer Request” to the node P-GW.
- step S1034 the node P-GW transmits “Modify Bearer Response” to the node S-GW. Send.
- step S1035 the node S-GW transmits “Modify Bearer Response” to the node MME.
- step S1036 the packet signal is switched to be transmitted and received between the node P-GW and the mobile station UE # 1 via the node S-GW, the node SGSN, and the radio network controller RNC.
- Step S1037 release control of the packet communication bearer used in the first communication state is performed between the mobile station UE # 1 and the node MME.
- Step S101 when the mobile station UE # 1 transmits “Attach Request” or “Tracking Area Update Request” including information indicating the presence or absence of the SRVCC capability to the node MME in Step S101, Step In S102, the node MME determines whether the mobile station UE # 1 has the SRVCC capability based on the received “Attach Request” or “Tracking Area Update Request”.
- the node MME determines that the mobile station UE # 1 has the SRVCC capability, the node MME selects the node S-GW having the above-mentioned predetermined capability in step S103, and selects the node S-GW And instructing to set up a bearer for the mobile station UE.
- step S104 the node MME transmits “Attach Accept” or “Tracking Area Update Accept” to the mobile station UE # 1.
- the bearer for the VoIP bearer signal is set in step S112 with reference to QCI (QoS Class Identifier) and the like. It is determined whether or not it has been done.
- step S113 the node MME performs a handover process related to normal packet communication unrelated to the SRVCC process.
- step S114 whether or not the node S-GW is compatible with the present invention, that is, a predetermined capability (capability corresponding to the present invention). It is determined whether it is equipped.
- the node MME determines that the node S-GW is not compatible with the present invention, the node MME performs the conventional SRVCC processing in step S115.
- step S116 the bearer in which a predetermined flag indicating that SRVCC according to the present invention is performed is set for the extended MSC / MGW. Send “PS to CS Request” including the context.
- step S122 when the extended MSC / MGWE receives “PS to CS Request” from the node MME in step S121, in step S122, the extended MSC / MGWE starts processing for the bearer context included in “PS to CS Request”. In step S123, conventional SRVCC processing is performed.
- step 124 the extended MSC / MGWE determines whether or not a predetermined flag is set in the bearer context included in “PS to CS Request”.
- step S125 If it is determined that the predetermined flag is set, the operation proceeds to step S125. If it is determined that the predetermined flag is not set, the operation ends.
- step S125 the extended MSC / MGWE allocates bearer information (IP address and TEID) for communication with the node S-GW, and notifies the bearer information to the node MME through “PS to CS Response”.
- bearer information IP address and TEID
- the node S-GW receives "Modify Bearer Request" from the node MME in step S131, and receives the IP address and TEID of the extended MSC / MGWE in step S132.
- step S133 the node S-GW assigns bearer information (IP address and TEID) for communication with the extended MSC / MGWE and notifies the bearer information to the node MME through “Modify Bearer Response”.
- bearer information IP address and TEID
- step S134 the node S-GW starts Bi-casting of the VoIP media signal for the extended MSC / MGW and the radio base station eNodeB.
- step S142 when the node S-GW receives the U-plane data in the uplink direction in step S141, in step S142, whether or not the U-plane data is U-plane data from the extended MSC / MGW. Judge about.
- step S143 the node S-GW continues Bi-casting of the VoIP media signal for the extended MSC / MGW and the radio base station eNodeB.
- step S144 the node S-GW stops forwarding the VoIP media signal corresponding to the U-plane data to the radio base station eNodeB. That is, Bi-casting of the VoIP media signal for the extended MSC / MGW and the radio base station eNodeB is stopped.
- the U plane data is transmitted between the mobile station UE # 1 and the node P-GW via the radio network controller RNC and the node S-GW. Are being sent and received.
- step S2001 when the handover process from the 2G / 3G wireless access system of the mobile station UE # 1 to the LTE wireless access system is started between the mobile station UE # 1 and the radio network controller RNC.
- the radio network controller RNC transmits “Relocation Required” including the “CS / PS HO bit” to the node SGSN.
- step S2003 the node SGSN determines whether or not the mobile station UE and the node MME are compatible with the present invention.
- the node SGSN determines that the mobile station UE and the node MME are compatible with the present invention, the node SGSN adds a bearer context for the VoIP media signal in step S2004.
- step S2005 the radio network controller RNC transmits “Relocation Required” to the node MSC.
- step S2006 the node MSC transmits “MAP Prepare HO req” to the extended MSC / MGW.
- step S2007 the extended MSC / MGW transmits “CS to PS Request” to the node SGSN.
- step S2008 the node SGSN transmits the EPS bearer for the VoIP media signal related to the mobile station UE # 1. Start creating.
- step S2009 the node SGSN transmits “Forward Relocation Request” including the VoIP media addition identifier to the node MME.
- the node SGSN receives from the extended MSC / MGW. After receiving “CS to PS Request”, “Forward Relocation Request” is transmitted to the node MME.
- the node SGSN may perform only the handover process related to the conventional packet communication.
- step S2010 the node MME adds a bearer context for the VoIP media signal based on the VoIP media addition identifier included in the received “Forward Relocation Request”, and in step S2011, for the radio base station eNodeB, “ "Relocation Request" is transmitted.
- step S2012 the radio base station eNodeB transmits “Relocation Request Acknowledge” to the node MME, and in step S2013, the node MME transmits “Modify Bearer Request” to the node S-GW.
- step S2014 the node S-GW allocates an IP address and a TEID to the bearer for the VoIP media signal, and in step S2015, transmits “Modify Bearer Response” including the IP address and the TEID to the node MME. To do.
- step S2016 the node MME transmits “Forward Relocation Response” to the node SGSN
- step S2017 the node SGSN transmits “CS to PS Response” to the extended MSC / MGW.
- steps S2009 to S2017 are operations related to a handover process for a packet signal.
- step S2018 the extended MSC / MGW transmits “MAP Prepare HO ack” to the node MSC.
- step S2019 the node S-GW starts Bi-casting of the VoIP media signal for the extended MSC / MGW and the radio base station eNodeB (the VoIP media signal bearer).
- step S2111 the node MSC transmits “Handover Command” to the radio network controller RNC.
- step S2112 the node SGSN excludes the VoIP bearer signal from being transferred to the node MME.
- step S2113 “Handover Command” is transmitted to the radio network controller RNC.
- step S2114 the radio network controller RNC transmits “HO from UTRAN Command” to the mobile station UE # 1.
- step S2115 a procedure for establishing a radio access link between the mobile station UE # 1 and the radio base station eNodeB is performed.
- step S2116 the mobile station UE # 1 Send “Handover to E-UTRAN Complete”.
- the mobile station UE # 1 can transmit uplink U-plane data to the radio base station eNodeB.
- the radio network controller RNC Upon receiving the downlink U plane data in step S2118, the radio network controller RNC transfers the downlink U plane data to the radio base station eNodeB if “Direct Forwarding” is applied. .
- the radio network controller RNC receives the downlink U-plane data in step S2118, if “Indirect Forwarding” is applied, the radio network controller RNC transmits the downlink U-plane data via the node S-GW. To the radio base station eNodeB.
- the radio network controller RNC transfers the data from the node S-GW to the radio base station eNodeB via the node SGSN.
- step S2119 the U plane data is transmitted and received between the mobile station UE # 1 and the node P-GW via the radio base station eNodeB and the node S-GW.
- the node S-GW when receiving the uplink VoIP media signal, the node S-GW stops the above-described Bi-casting and releases the VoIP media signal bearer for the extended MSC / MGW.
- step S2120 the radio base station eNodeB transmits “Relocation Complete” to the node MME.
- step S2121 the node MME transmits “Forward Relocation Complete” to the node SGSN, and in step S2122, the node SGSN transmits “Forward Relocation Complete Acknowledge” to the node MME.
- step S2123 the node SGSN transmits “Modify Bearer Request” to the node S-GW.
- step S2124 the node S-GW transmits “Modify Bearer Request” to the node P-GW.
- step S2125 the node P-GW transmits “Modify Bearer Response” to the node S-GW. Send.
- step S2126 the node S-GW transmits “Modify Bearer Response” to the node SGSN.
- step S2127 the packet signal is switched between the node P-GW and the mobile station UE # 1 so as to be transmitted / received via the node S-GW and the radio base station eNodeB.
- step S2128 release control of the bearer for packet communication used in the second communication state is performed between the mobile station UE # 1 and the node SGSN.
- step S2129 the mobile station UE # 1 and the extended MSC / The opening control of the bearer for circuit-switched communication used in the second communication state is performed with the MGW.
- the switching process between the first communication state and the second communication state can be realized by being closed in the visited network of the mobile station UE # 1.
- the switching time during which communication is disabled it is possible to perform such switching processing without requiring control by the IMS.
- the switching process described above can be completely concealed from the home network of the mobile station UE # 1 and the mobile station UE # 2, it is arranged in the home network of the mobile station UE # 1.
- the IMS does not require SRVCC capability, and complicated procedures are not required between the home network and the visited network of the mobile station UE # 1.
- the mobile communication system according to the first embodiment of the present invention, switching from the second communication state to the first communication state is possible, and packet communication and voice communication using the LTE radio access system are possible. By increasing the opportunities to use the service simultaneously, serviceability can be improved.
- Modification 1 A mobile communication system according to Modification 1 of the present invention will be described with reference to FIG. 11 to FIG.
- the mobile communication system according to the first modification of the present invention will be described by paying attention to differences from the mobile communication system according to the first embodiment described above.
- the mobile communication system according to the first modification has no extended MSC / MGW.
- the VoIP media signal is transmitted and received between the mobile station UE # 1 and the mobile station UE # 2 via the LTE radio access system and the node S-GW. Yes.
- the VoIP control signal is configured to be transmitted / received via the LTE wireless access system, the node S-GW, and the IMS.
- a circuit switching signal is transmitted / received between the mobile station UE # 1 and the node S-GW via the 2G / 3G wireless access system, and the VoIP media signal moves with the node S-GW.
- the VoIP control signal is transmitted / received between the mobile station UE # 1 and the mobile station UE # 2 via the 2G / 3G wireless access system, the node S-GW, and the IMS. It is comprised so that it may be transmitted / received.
- the node S-GW is configured to convert a circuit switching signal and a VoIP media signal.
- the U plane data including the VoIP media signal, the VoIP control signal, and the packet signal moves via the radio base station eNodeB and the node S-GW. Transmission / reception is performed between the station UE # 1 and the node P-GW.
- Step S3001 when the handover process from the LTE wireless access system of the mobile station UE # 1 to the 2G / 3G wireless access system is started between the mobile station UE # 1 and the wireless base station eNodeB, In step S3002, the radio base station eNodeB transmits “Handover Required” to the node MME.
- step S3003 the node MME determines whether or not the mobile station UE has the SRVCC capability, and whether or not the node S-GW has a predetermined capability (capability of the present invention). To do.
- the node MME determines that the mobile station UE and the node S-GW have SRVCC capability, the node MME transmits “Forward Relocation Request” to the node SGSN in step S3004.
- the node SGSN determines in step S3005 that there is a VoIP media signal bearer in the MM context, the node SGSN transmits “Relocation Request” to the radio network controller RNC in step S3006.
- the line control station RNC transmits “Relocation Request Acknowledge” to the node SGSN.
- step S3008 the node SGSN transmits “Relocation Request for lu-UP” including the bearer identifier for the VoIP media signal to the radio network controller RNC.
- step S3009 the radio network controller RNC transmits the node SGSN to the node SGSN.
- “Bearer Establish” including the bearer identifier for the VoIP media signal is transmitted.
- step S3010 the node S-GW assigns the IP address and port number on the node S-GW side to the lu-UP bearer, and in step S3011, transmits “Bearer Confirm” to the radio network controller RNC. To do.
- step S3012 the initialization process of the lu-UP bearer is performed between the node S-GW and the radio network controller RNC.
- step S3013 the radio network controller RNC sends a “Relocation Request” to the node SGSN. Send Acknowledgment for lu-UP.
- step S3014A the setting of the lu-UP bearer in the radio network controller RNC is completed, and in step S3014B, the setting of the lu-UP bearer in the node S-GW is completed.
- step S3015 the node SGSN transmits “Forward Relocation Response” addressed to the node S-GW to the node MME.
- step S3016 the node S-GW starts Bi-casting of the VoIP media signal for the radio network controller RNC (lu-UP bearer) and the radio base station eNodeB (VoIP media signal bearer).
- the node S-GW performs codec conversion (RTP / AMR-lu-UP / AMR) between the circuit switching signal and the VoIP media signal.
- step S3021 the node MME excludes the VoIP bearer signal from being transferred to the node SGSN, and transmits “Handover Command” to the radio base station eNodeB in step S3022.
- step S3024 the radio base station eNodeB transmits "HO from E-UTRAN Command" to the mobile station UE # 1.
- step S3025 a procedure for establishing a radio access link is performed between the mobile station UE # 1 and the radio network controller RNC.
- step S3026 the mobile station UE # 1 “Handover to UTRAN Complete” is transmitted, and in step S3027, the mobile station UE # 1 can transmit uplink U-plane data to the radio network controller RNC.
- step S3028 the mobile station UE # 1 transmits a circuit switching signal to the node S-GW via the radio network controller RNC (lu-UP bearer), and the node S-GW
- step S3029 the received circuit switching signal is subjected to codec conversion processing to obtain a VoIP media signal
- step S3030 the VoIP media signal is transmitted to the node P-GW.
- the node S-GW Since the node S-GW has received the uplink U-plane data in step S3031, the node S-GW stops the above-described bi-casting, and in step S3032, the circuit switching signal is transmitted to the radio network controller RNC (lu-UP bearer). To the mobile station UE # 1.
- RNC radio network controller
- step S3033 when the radio base station eNodeB receives the downlink U plane data, if “Direct Forwarding” is applied, the radio base station eNodeB transfers the downlink U plane data to the radio network controller RNC. .
- the radio base station eNodeB when the radio base station eNodeB receives the downlink U-plane data in step S3033, if “Indirect Forwarding” is applied, the radio base station eNodeB transmits the downlink U-plane data via the node S-GW. Transfer to the radio network controller RNC.
- “Direct Tunnel” when “Direct Tunnel” is not used, the radio base station eNodeB transfers from the node S-GW to the radio network controller RNC via the node SGSN.
- step S3034 the radio network controller RNC transmits “Relocation Complete” to the node SGSN.
- step S3035 the node SGSN transmits “Forward Relocation Complete” to the node MME, and in step S3036, the node MME transmits “Forward Relocation Complete Acknowledge” to the node SGSN.
- step S3037 the node MME transmits “Modify Bearer Request” to the node S-GW.
- step S3038 the node S-GW transmits “Modify Bearer Request” to the node P-GW.
- step S3039 the node P-GW transmits “Modify Bearer Response” to the node S-GW. Send.
- step S3040 the node S-GW transmits “Modify Bearer Response” to the node MME.
- step S3041 switching is performed so that the VoIP control signal and the packet signal are transmitted and received between the node P-GW and the mobile station UE # 1 via the node S-GW, the node SGSN, and the radio network controller RNC. It is done.
- the VoIP media signal is transmitted and received between the node S-GW and the node P-GW, and the circuit switching signal is transmitted between the mobile station UE # 1 and the node S-GW via the radio network controller RNC.
- the node S-GW performs codec conversion (RTP / AMR-lu-UP / AMR) between the circuit switching signal and the VoIP media signal.
- step S3042 release control of the bearer for packet communication used in the first communication state is performed between the mobile station UE # 1 and the node MME.
- the node MME when the node MME receives “Handover Required” from the E-UTRAN in step S201, the node MME refers to the QCI or the like in step S202 to determine whether or not the VoIP bearer signal bearer is set. Judge about.
- step S203 the node MME performs a handover process related to normal packet communication unrelated to the SRVCC process.
- step S204 whether or not the mobile station UE # 1 and the node S-GW are compatible with the present invention, that is, a predetermined function It is determined whether or not (function according to the present invention) is provided.
- the node MME determines that the mobile station UE # 1 and the node S-GW are not compatible with the present invention, the node MME performs conventional SRVCC processing in step S205.
- step S206 the node MME has a predetermined identifier indicating that the node SGSN performs SRVCC according to the present invention. “Forward Relocation Request” including the set bearer context is transmitted.
- Step S211 when the node MME receives “Forward Relocation Response” from the node SGSN in Step S211, whether or not the VoIP bearer signal bearer is set with reference to QCI or the like in Step S212. Judge about.
- step S213 the node MME performs a handover process related to normal packet communication unrelated to the SRVCC process.
- step S214 the VoIP media signal is sent to “Bearers Subject to Data Forwarding List” in “Handover Command” to be transmitted to E-UTRAN. Bearer information is not set.
- the node SGSN when the node SGSN receives “Forward Relocation Request” from the node MME in step S221, the node SGSN starts processing for the bearer context included in the “Forward Relocation Request” in step S222, and in step S223. , Whether or not a predetermined identifier is set in the bearer context included in “Forward Relocation Request”.
- step S224 When it is determined that the predetermined identifier is set, the operation proceeds to step S224, and when it is determined that the predetermined flag is not set, the operation proceeds to step S225.
- step S224 the node SGSN instructs the radio network controller RNC to set up a circuit-switched communication bearer, and performs a handover process related to normal packet communication unrelated to the SRVCC process.
- step S225 the node SGSN performs a handover process related to normal packet communication not related to the SRVCC process.
- step S232 the node S-GW transmits the IP on the node S-GW side to the lu-UP bearer. An address and a port number are assigned, and a VoIP media signal bearer to be converted by the codec is stored.
- step S233 the node S-GW transmits “Bearer Confirm” including the IP address and the port number.
- the node S-GW completes the setting of the lu-UP bearer with the radio network controller RNC in step S241, the node S-GW transmits the target VoIP media signal to the radio network controller in step S242. Bi-casting for the station RNC and the radio base station eNodeB is started.
- step S251 when the node S-GW receives uplink U-plane data in step S251, whether or not the U-plane data is received via lu-UP in step S252. Determine whether or not.
- the node S-GW determines that the U-plane data is not received via lu-UP, the node S-GW continues Bi-casting of the VoIP media signal for the radio network controller RNC and the radio base station eNodeB in step S253.
- the node S-GW determines that the U plane data is received via lu-UP, the node S-GW stops forwarding the VoIP media signal corresponding to the U plane data to the radio base station eNodeB in step S254. That is, Bi-casting of the VoIP media signal for the radio network controller RNC and the radio base station eNodeB is stopped.
- the operation of the mobile communication system according to the first modification example is described.
- the first communication is started from the second communication state. An operation when switching to a state will be described.
- the U plane data is transmitted between the mobile station UE # 1 and the node P-GW via the radio network controller RNC and the node S-GW. Are being sent and received.
- step S4001 when the handover process from the 2G / 3G wireless access system of the mobile station UE # 1 to the LTE wireless access system is started between the mobile station UE # 1 and the radio network controller RNC.
- the radio network controller RNC transmits “Relocation Required” to the node SGSN.
- step S4003 the node SGSN starts creating an EPS bearer for the VoIP media signal when it is determined that the mobile station UE and the node MME are compatible with the present invention.
- step S4004 the node SGSN transmits “Forward Relocation Request” including the bearer identifier for the VoIP media signal to the node MME.
- step S4005 the node MME adds a bearer context for the VoIP media signal based on the VoIP media signal bearer identifier included in the received “Forward Relocation Request”.
- step S4006 the node MME adds the bearer context to the radio base station eNodeB. , "Handover Request" is transmitted.
- step S4007 the radio base station eNodeB transmits “Handover Request Acknowledge” to the node MME, and in step S4008, the node MME transmits “Modify Bearer Request” to the node S-GW.
- step S4009 the node S-GW assigns an IP address and a TEID to the VoIP media signal bearer.
- the node S-GW transmits a “Modify Bearer Response” including the IP address and the TEID to the node MME. To do.
- step S4011 the node MME transmits “Forward Relocation Response” to the node SGSN.
- step S4012 the node S-GW starts Bi-casting of the VoIP media signal for the extended MSC / MGW and the radio base station eNodeB (a VoIP media signal bearer).
- the node SGSN excludes the VoIP bearer signal from being transferred to the node MME in step S4021, and transmits “Handover Command” to the radio network controller RNC in step S4022.
- step S4023 the radio network controller RNC transmits “HO from UTRAN Command” to the mobile station UE # 1.
- step S4024 a procedure for establishing a radio access link between the mobile station UE # 1 and the radio base station eNodeB is performed.
- step S4025 the mobile station UE # 1 transmits a “Handover” to the radio base station eNodeB. to E-UTRAN Complete ”.
- step S4026 the mobile station UE # 1 can transmit uplink U-plane data to the radio base station eNodeB.
- step S4028 the mobile station UE # 1 transmits a VoIP media trust and VoIP control signal to the node S-GW via the radio base station eNodeB (a VoIP media signal bearer).
- step S4029 the S-GW transmits the VoIP media signal to the node P-GW without performing codec conversion processing on the received circuit switching signal.
- the node S-GW Since the node S-GW has received the uplink U-plane data in step S4030, the node S-GW stops the above-described Bi-casting and releases the VoIP media signal bearer for the radio network controller RNC. In step S4031, the node S-GW The exchange signal is transmitted to the mobile station UE # 1 via the radio base station eNodeB (lu-UP bearer).
- the radio network controller RNC Upon receiving the downlink U plane data in step S4032, the radio network controller RNC transfers the downlink U plane data to the radio base station eNodeB when “Direct Forwarding” is applied. .
- the radio network controller RNC receives the downlink U-plane data in step S4032, if “Indirect Forwarding” is applied, the radio network controller RNC transmits the downlink U-plane data via the node S-GW. To the radio base station eNodeB.
- “Direct Tunnel” when “Direct Tunnel” is not used, the radio network controller RNC transfers the data from the node S-GW to the radio base station eNodeB via the node SGSN.
- step S4033 the radio network controller RNC transmits “Relocation Complete” to the node SGSN.
- Step S4034 the node SGSN transmits “Forward Relocation Complete” to the radio base station eNodeB, and in Step S4035, the radio base station eNodeB transmits “Forward Relocation Complete Acknowledge” to the node SGSN. .
- step S4036 the node SGSN transmits “Modify Bearer Request” to the node S-GW.
- step S4037 the node S-GW transmits “Modify Bearer Request” to the node P-GW.
- step S4038 the node P-GW transmits “Modify Bearer Response” to the node S-GW. Send.
- step S4039 the node S-GW transmits “Modify Bearer Response” to the node SGSN.
- step S4040 the packet signal is switched to be transmitted and received between the node P-GW and the mobile station UE # 1 via the node S-GW and the radio base station eNodeB.
- step S4041 release control of the bearer for packet communication used in the second communication state is performed between the mobile station UE # 1 and the node SGSN.
- step S4042 the mobile station UE # 1 and the node S ⁇
- the release control of the bearer for circuit-switched communication used in the second communication state is performed with the GW.
- Modification 2 With reference to FIG. 22, a mobile communication system according to Modification 2 of the present invention is described.
- the mobile communication system according to the second modification of the present invention will be described by focusing on differences from the mobile communication system according to the first modification described above.
- the VoIP control signal and the packet signal are configured to be transmitted / received via the node SGSN.
- the circuit switching signal is configured to be transmitted and received without going through the node SGSN.
- Modification 3 With reference to FIG.23 and FIG.24, the mobile communication system which concerns on the modification 3 of this invention is demonstrated.
- the mobile communication system according to Modification 3 of the present invention will be described by focusing on differences from the mobile communication system according to the first embodiment described above.
- VoIP control signal including information related to IMS via node P-CSCF provided in the visited network of mobile station UE # 1 and node S-CSCF arranged in the home network of mobile station UE # 1 May be configured to be transmitted and received.
- the information related to the IMS (for example, the MS) is transmitted to the node SCC AS arranged in the home network of the mobile station UE # 1. -ISDN information, etc.) may be notified to update the information related to the IMS held by the node SCC AS.
- step S5001 when switching from the first communication state to the second communication state, in step S5001, the extended MSC / MGW is provided in the visited network of the mobile station UE # 1.
- An “information update SIP message” including “STN-SR” and “SDP-MGW” is sent to the node S-CSCF arranged in the home network of the mobile station UE # 1 via the node P-CSCF. Send.
- the information update SIP message is, for example, “UPDATE” or “RE-INVITE”.
- STN-SR indicates a switching process from the first communication state to the second communication state
- SDP-MGW indicates VoIP media information
- step S5002 the node S-CSCF sends an “information update SIP message” including “STN-SR” and “SDP-MGW” to the node SCC AS arranged in the home network of the mobile station UE # 1. Send.
- step S5003 the node SCC AS updates the information related to the IMS held by the node SCC AS according to the received “information update SIP message”.
- the node SCC AS is configured to notify the extended MSC / MGW of the information related to the IMS held before the switch from the first communication state to the second communication state. May be.
- the first feature of the present embodiment is that an LTE (first communication) wireless access system that does not support circuit-switched communication, a mobile transmission network that accommodates an LTE wireless access system, and circuit-switched communication are provided.
- the VoIP control signal is transmitted / received via the LTE wireless access system, the node S-GW, and the IMS, and in the second communication state, the mobile station UE # 1 is located in the 2G / 3G wireless access system and is configured to perform voice communication with the mobile station UE # 2, and the circuit switching signal is 2G / 3G based.
- VoIP media is transmitted and received between the mobile station UE # 1 and the extended MSC / MGW arranged in the 2G / 3G core network via the radio access system.
- the extended MSC / MGW is configured to convert a circuit switching signal and a combination of a VoIP media signal and a VoIP control signal.
- VoIP including information related to IMS between the extended MSC / MGW and the node SCC AS arranged in the home network of the mobile station UE # 1 You may be comprised so that a control signal may be transmitted / received.
- the second feature of the present embodiment includes an LTE wireless access system, a mobile transmission network, a 2G / 3G wireless access system, a 2G / 3G wireless core network, and an IMS.
- the mobile communication system is configured to be able to switch between the first communication state and the second communication state, and in the first communication state, the mobile station UE # 1 is an LTE radio access system.
- the mobile station UE # 2 is configured to perform voice communication with the mobile station UE # 2, and the VoIP media signal is transmitted between the mobile station UE # 1 and the mobile station UE # 2.
- VoIP control signals are transmitted / received via the LTE wireless access system, nodes S-GW, and IMS.
- the mobile station UE # 1 is located in the 2G / 3G wireless access system and is configured to perform voice communication with the mobile station UE # 2.
- the circuit switching signal is transmitted and received between the mobile station UE # 1 and the node S-GW via the 2G / 3G wireless access system, and the VoIP media signal is transmitted between the node S-GW and the mobile station.
- the VoIP control signal is transmitted and received between the UE # 2 and the mobile station UE # 1 and the mobile station UE # 2 via the 2G / 3G radio access system and the nodes S-GW and IMS.
- the gist is that the node S-GW is configured to convert between a circuit-switched signal and a VoIP media signal.
- a VoIP control signal is transmitted between a 2G / 3G wireless access system and a node SGSN (packet switching center) disposed in a 2G / 3G core network.
- You may be comprised so that it may transmit / receive between mobile station UE # 1 and mobile station UE # 2 via node S-GW and IMS.
- MME Mobility Management Entity
- PGW Packet Control Function
- P-CSCF Packet Control Function
- SCC AS Packet Control Function
- S / P-CSCF Packet Control Function
- eNodeB SGSN
- MSC Mobile Communications Service
- 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 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 MME, SGW, PGW, P-CSCF, S-CSCF, SCC AS, S / P-CSCF, eNodeB, SGSN, MSC, and UE.
- the storage medium and the processor may be provided in the MME, SGW, PGW, P-CSCF, S-CSCF, SCC AS, S / P-CSCF, eNodeB, SGSN, MSC, and UE as discrete components. .
Abstract
Description
図1乃至図10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について説明する。
第1通信状態では、移動局UE#1(第1移動局)は、LTE方式の無線アクセスシステムに在圏しており、移動局UE#2(第2移動局)との間で音声通信を行うように構成されている。
図11乃至図21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、本発明の変更例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22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、本発明の変更例2に係る移動通信システムについて、上述の変更例1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23及び図24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、本発明の変更例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。
Claims (1)
- 回線交換通信をサポートしていない第1通信方式の無線アクセスシステムと、回線交換通信をサポートしている第2通信方式の無線アクセスシステムと、サービス制御ネットワークとを具備しており、第1通信状態と第2通信状態とを切り替えることができるように構成されている移動通信システムであって、
前記第1通信状態では、第1移動局は、前記第1通信方式の無線アクセスシステムに在圏しており、第2移動局との間で音声通信を行うように構成されており、
前記第2通信状態では、前記第1移動局は、前記第2通信方式の無線アクセスシステムに在圏しており、前記第2移動局との間で音声通信を行うように構成されており、
前記第1移動局の在圏ネットワーク内で、前記第1通信状態におけるVoIPメディア信号及びVoIP制御信号の経路と、前記第2通信状態における回線交換信号、VoIPメディア信号及びVoIP制御信号の経路とを切り替えるように構成されており、
前記第1移動局の在圏ネットワーク内のゲートウェイ装置は、前記第2通信状態における前記回線交換信号と、前記第2通信状態における前記VoIPメディア信号及び前記VoIP制御信号の組み合わせとを変換するように構成されていることを特徴とする移動通信システム。
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012107680/08A RU2012107680A (ru) | 2009-08-12 | 2010-08-11 | Система мобильной связи |
BR112012003126-0A BR112012003126B1 (pt) | 2009-08-12 | 2010-08-11 | Sistema de comunicação móvel, método de comunicação móvel para um sistema de comunicação móvel, estação móvel, método de comunicação móvel para uma estação móvel, msc/mgw melhorado e método de controle de sinal por um msc/mgw melhorado |
AU2010283277A AU2010283277B2 (en) | 2009-08-12 | 2010-08-11 | Mobile communication system |
US13/389,654 US8908642B2 (en) | 2009-08-12 | 2010-08-11 | Mobile communication system |
CN2010800358577A CN102511185B (zh) | 2009-08-12 | 2010-08-11 | 移动通信系统 |
BR122013024260-0A BR122013024260B1 (pt) | 2009-08-12 | 2010-08-11 | Método de comunicação móvel para um sistema de comunicação móvel, estação móvel para realizar continuidade de chamada de voz de rádio única e método de comunicação móvel para uma estação móvel |
EP10808242.1A EP2466969A4 (en) | 2009-08-12 | 2010-08-11 | MOBILE COMMUNICATION SYSTEM |
KR1020127003782A KR101249761B1 (ko) | 2009-08-12 | 2010-08-11 | 이동통신시스템 |
KR1020127030415A KR101430676B1 (ko) | 2009-08-12 | 2010-08-11 | 이동통신시스템 |
CA2770742A CA2770742C (en) | 2009-08-12 | 2010-08-11 | Mobile communication system |
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CN102448129A (zh) * | 2011-12-31 | 2012-05-09 | 中兴通讯股份有限公司 | Lte系统的模式切换方法及装置 |
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WO2019222385A1 (en) | 2018-05-15 | 2019-11-21 | University Of Tennessee Research Foundation | Compounds for treatment of triple negative breast cancer and ovarian cancer |
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