WO2012017809A1 - Communication system, gateway apparatus, communication terminal and information processing method - Google Patents

Communication system, gateway apparatus, communication terminal and information processing method Download PDF

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Publication number
WO2012017809A1
WO2012017809A1 PCT/JP2011/066228 JP2011066228W WO2012017809A1 WO 2012017809 A1 WO2012017809 A1 WO 2012017809A1 JP 2011066228 W JP2011066228 W JP 2011066228W WO 2012017809 A1 WO2012017809 A1 WO 2012017809A1
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Prior art keywords
mobile switching
switching center
domain
base station
femtocell base
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PCT/JP2011/066228
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French (fr)
Japanese (ja)
Inventor
瑠美 小林
佳央 植田
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日本電気株式会社
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Publication of WO2012017809A1 publication Critical patent/WO2012017809A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/045—Interfaces between hierarchically different network devices between access point and backbone network device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to a communication system, a gateway device, a communication terminal, and an information processing method.
  • FIG. 1 is a block diagram showing a configuration example of a related communication system.
  • the communication system includes a Home Node B (hereinafter referred to as HNB) 110 and a Home Node B Gateway (hereinafter referred to as HNBGW) 120.
  • HNB 110 and the HNBGW 120 are connected by an Iuh interface.
  • HNBGW 120 is connected to mobile switching center 100 via an Iu interface.
  • the mobile switching center 100 is connected to a network not shown in the figure.
  • UE 130 is a mobile communication terminal connected to the HNB 110 through wireless communication.
  • the HNB 110 is a base station device that constructs a femto cell having a radius of several tens of meters within a communication range (hereinafter referred to as a cell).
  • the HNBGW 120 is a device that focuses and controls a large number of HNBs 110.
  • the mobile switching center 100 includes a base station having a circuit switching function (Circuit Switched (hereinafter referred to as CS)) and a switching station having a packet switching function (Packet Switched (hereinafter referred to as PS)). It is a device including.
  • CS Circuit Switched
  • PS Packet Switched
  • the mobile switching center 100 includes, for example, a Mobile Service Switching Center (hereinafter referred to as MSC) that provides a circuit switching (CS) service to a user, and a Serving General Packet Radio that provides a packet switching (PS) service to a user. It is a device that includes Service Support Node (hereinafter referred to as SGSN).
  • MSC Mobile Service Switching Center
  • SGSN Service Support Node
  • the UE 130 When the UE 130 enters the cell of the HNB 110 and wireless communication with the HNB 110 becomes possible, the UE 130 transmits a location registration signal for registering the cell in which it is located in the mobile switching center 100 to the HNB 110 by wireless communication at a constant cycle. Send.
  • a cell that is a location registration target is hereinafter referred to as a location registration area.
  • the HNB 110 receives the location registration signal from the UE 130, the HNB 110 transfers the location registration signal to the HNBGW 120.
  • HNBGW 120 transmits a location registration signal received from HNB 110 to mobile switching center 100.
  • Patent Document 1 An example of a method of restricting access to congestion for a CN domain including a CS domain and a PS domain is disclosed in the republished WO2007 / 111007 (hereinafter referred to as Patent Document 1).
  • the UE transmits a location registration signal to the mobile switching center at regular intervals. Further, even when the position of the UE extends over a plurality of position registration areas, the UE frequently transmits a position registration signal to the mobile switching center. If the mobile switching center is unable to process the location registration signal, the UE cannot receive a notification from the mobile switching center that the location registration has been processed successfully, and the UE sends the location registration signal via the HNB and HNBGW. Thus, it is repeatedly transmitted to the mobile switching center at a cycle shorter than the determined cycle. As a result, the processing load on the UE side and the processing load on the network side including the HNB and HNBGW increase.
  • Patent Document 1 selects a communication terminal subject to CS domain restriction against congestion to the CN domain, and is insufficient as a countermeasure for a mobile switching center where a failure has occurred. It is.
  • One of the objects of the present invention is to provide a communication system, a gateway device, a communication terminal and an information processing method capable of reducing the communication processing load of the communication terminal and the network node when a failure occurs in the mobile switching center. It is to be.
  • the communication system performs a health check on the mobile switching center at a constant cycle, and detects a failure in the mobile switching center or a fault in a transmission path connecting the mobile switching center and the own apparatus.
  • a gateway device that transmits a domain restriction message to the femtocell base station, which is a message that restricts access to the domain of the mobile switching center, and a communication terminal in the communication area upon receiving the domain restriction message from the gateway device
  • a femtocell base station that transmits broadcast information including information indicating that signal transmission to the mobile switching center is restricted by wireless communication.
  • a gateway device is a gateway device that relays communication between a mobile switching center and a femtocell base station, and performs a health check on the mobile switching center at a constant cycle to move the mobile switching center.
  • a domain restriction message which is a message to restrict access to the domain of the mobile switching center, is sent to the femtocell base. It is the structure which has a control part which transmits to a station.
  • a communication terminal regulates signal transmission to a radio communication unit for transmitting / receiving a signal to / from a femtocell base station and a mobile switching center connected to the femtocell base station.
  • a terminal control unit that stops transmission of a signal including a location registration signal to the mobile switching center when broadcast information including information is received from the femtocell base station.
  • An information processing method is an information processing method using a communication system having a gateway device and a femtocell base station, and the gateway device performs a health check on the mobile switching center at a constant cycle.
  • the gateway device detects a failure in the mobile switching center or a failure in a transmission path connecting the mobile switching center and the gateway device, the gateway device is a domain restriction message that restricts access to the domain of the mobile switching center.
  • the message is transmitted to the femtocell base station, and when the femtocell base station receives the domain restriction message from the gateway device, the femtocell base station includes information indicating that the signal transmission to the mobile switching center is restricted to the communication terminal within the communication range. Broadcast information is transmitted by wireless communication.
  • an information processing method is an information processing method by a gateway device that relays communication between a mobile switching center and a femtocell base station.
  • a gateway device that relays communication between a mobile switching center and a femtocell base station.
  • FIG. 1 is a block diagram showing a configuration example of a related communication system.
  • FIG. 2 is a block diagram illustrating a configuration example of the communication system according to the present embodiment.
  • FIG. 3 is a block diagram showing a configuration example of the HNBGW shown in FIG.
  • FIG. 4 is a table showing an example of the domain restriction message introduced in this embodiment.
  • FIG. 5 is a block diagram showing an example of the configuration of the HNB shown in FIG.
  • FIG. 6 is a block diagram showing a configuration example of the UE shown in FIG.
  • FIG. 7 is a sequence diagram for explaining the operation of the communication system of this embodiment.
  • FIG. 8 is a flowchart showing an operation procedure by the UE after CS domain restriction.
  • FIG. 9 is a sequence diagram for explaining the operation of the communication system of this embodiment.
  • FIG. 10 is a flowchart showing an operation procedure by the UE after PS domain regulation.
  • FIG. 11 is a diagram for explaining an example when the UE performs cell search or reselection.
  • FIG. 12 is a diagram for explaining another example when the UE performs cell search or reselection.
  • FIG. 2 is a block diagram illustrating a configuration example of the communication system according to the present embodiment.
  • the communication system of the present embodiment includes an HNB 10 and an HNBGW 20.
  • the HNB 10 and the HNBGW 20 are connected by an Iuh interface.
  • the HNB 10 is connected to the UE 30 by radio communication.
  • the HNBGW 20 is connected to the mobile switching center 100 via the Iu interface.
  • the mobile switching center 100 is connected to a network not shown in the figure.
  • the domain in the mobile switching center 100 indicates MSC or SGSN.
  • FIG. 3 is a block diagram showing a configuration example of the HNBGW shown in FIG.
  • the HNBGW 20 is configured to include a control unit 21.
  • the control unit 21 includes a CPU (Central Processing Unit) 22 that executes processing according to a program, and a memory 23 for storing the program.
  • CPU Central Processing Unit
  • memory 23 for storing the program.
  • domain restriction messages transmitted via the Iuh interface are registered.
  • FIG. 4 is a table showing an example of the domain restriction message introduced in this embodiment.
  • the message shown in FIG. 4 may be defined in HNBAP (3GPP TS25.469), RUA (3GPP TS25.468) protocol, or RANAP (3GPP TS25.413), or may be defined in another protocol.
  • the domain restriction message of the present embodiment is characterized in that a failure occurs in the domain of the mobile switching center 100 (for example, MSC or SGSN).
  • the parameters "CN Domain Indicator” and "CN Domain Status" are introduced.
  • CN Domain Indicator indicates CS domain or PS domain as shown in 3GPP TS25.468.
  • a CS domain failure means an MSC failure.
  • a PS domain failure means a SGSN failure.
  • a domain in which a failure has occurred is referred to as a failure domain, and a domain in which no failure has occurred is referred to as a normal domain.
  • the MSC that provides the circuit switching service may be configured to include an MSC server and a media gateway (hereinafter referred to as MGW).
  • MGW media gateway
  • the failure of the circuit switching service indicates either the failure of the MSC server or the MGW, or both of these failures.
  • the failure may be a failure of the node (device) itself, but also includes a failure of a transmission path in the Iu interface between the mobile switching center 100 and the HNBGW 120.
  • a signaling link is set between the MSC and the SGSN of the mobile switching center 100 by SSCOP (Service Specific Connection Oriented Protocol) or SCTP (Stream Control Transmission Protocol), and at a constant cycle. MSC and SGSN health check. When a failure occurs in the MSC or SGSN, the health check in SSCOP or SCTP becomes NG, and the control unit 21 detects the failure of the opposite node in the higher SCCP (Skinny Client Control Protocol) layer.
  • SCCP Service Specific Connection Oriented Protocol
  • control unit 21 detects a failure of the mobile switching center 100 or the Iu interface, the control unit 21 transmits a domain restriction message that is a message for restricting access to the domain of the mobile switching center 100 to the HNB 10.
  • FIG. 5 is a block diagram showing a configuration example of the HNB shown in FIG.
  • the HNB 10 includes a radio communication unit 15 and a control unit 12 for transmitting and receiving signals to and from the UE 30.
  • the control unit 12 receives the domain restriction message from the HNBGW 20, the control unit 12 transmits broadcast information including information indicating that signal transmission to the mobile switching center 100 is restricted to the UE 30 in its own cell.
  • the control unit 12 may be a dedicated circuit such as a gate array, or may be configured virtually by the CPU executing a program.
  • FIG. 6 is a block diagram showing a configuration example of the UE shown in FIG.
  • the UE 30 includes a radio communication unit 35 and a terminal control unit 32 for transmitting and receiving signals to and from the HNB 10.
  • the terminal control unit 32 stops transmitting a signal to the mobile switching center 100.
  • the terminal control part 32 searches for other HNB, after receiving alerting
  • the terminal control unit 32 may be a dedicated circuit such as a gate array, or may be virtually configured by a CPU executing a program.
  • FIG. 7 is a sequence diagram showing the operation of the communication system of this embodiment.
  • FIG. 8 is a flowchart showing an operation procedure by the UE after the domain restriction in the sequence shown in FIG.
  • the HNBGW 20 When a failure occurs in the mobile switching center 100 or a transmission path with the mobile switching center 100, the HNBGW 20 causes “user-out-of-service information” or “signaling-point-inaccessible information” (3GPP TS25) in the SCCP layer. .410) and detects that an operation failure has occurred in the MSC of the mobile switching center 100 (step S101).
  • “user-out-of-service information” or “signaling-point-inaccessible information” (3GPP TS25) in the SCCP layer. .410
  • the HNBGW 20 transmits a domain restriction message of the HNBAP protocol to the HNB 10 (Step 102).
  • the domain restriction message is not limited to HNBAP, and other protocols such as RANAP and RUA may be used.
  • the control unit 21 of the HNBGW 20 can transmit two types of messages regarding the domain restriction to the HNB 10.
  • the first is a message that regulates access to both the CS domain and the PS domain
  • the second is a message that regulates access to the CS domain.
  • the first message is referred to as a CSPS domain restriction message
  • the second message is referred to as a CS domain restriction message.
  • step S102 when the HNBGW 20 transmits a CSPS domain restriction message to the HNB 10, the HNB 10 receives the CSPS domain restriction message from the HNBGW 20. In this case, the HNB 10 transmits broadcast information including cell barred indicating that access to the CS domain and the PS domain is not possible to the UE 30 in its own cell (step S103).
  • the UE 30 When receiving broadcast information including cell barred from the HNB 10, the UE 30 stops transmission of signals such as an access request signal that is a signal for requesting access to the HNB 10 and a location registration signal addressed to the mobile switching center. (Step S104). After that, the UE 30 performs reselection of a cell connected to another HNB that can use both services of the CS domain and the PS domain.
  • signals such as an access request signal that is a signal for requesting access to the HNB 10 and a location registration signal addressed to the mobile switching center.
  • the cells subject to cell reselection are currently the same frequency cell as the connected cell (intra frequency cell), a different frequency cell (inter frequency cell), and a different system cell (inter RAT cell).
  • the HNBGW 20 transmits a CS domain restriction message to the HNB 10 in step S102
  • the HNB 10 receives the CS domain restriction message from the HNBGW 20.
  • the HNB 10 transmits broadcast information including a CS Domain Specific Access Restriction (hereinafter referred to as CS DSAR), which is a message for restricting communication using the CS domain, to the UE 30 in its own cell ( Step S103).
  • CS DSAR CS Domain Specific Access Restriction
  • the UE 30 When receiving broadcast information including CS DSAR from the HNB 10, the UE 30 recognizes that a failure has occurred in the MSC, and transmits a signal such as an access request signal and a location registration signal addressed to the mobile switching center to the HNB 10. Stop (step S104). Since the UE 30 cannot currently use the CS service via the connected HNB 10, the UE 30 searches for another cell in which the CS service can be used in order to use the CS service.
  • FIG. 8 is a flowchart showing the operation procedure of the UE after CS domain restriction.
  • the UE 30 determines whether or not an instruction for requesting a CS call is input by a user operation (step S302). ).
  • the UE 30 searches for another HNB that can communicate with, unlike the currently connected HNB, and can communicate with another HNB. Connect with HNB.
  • the UE 30 When the UE 30 receives broadcast information including CS DSAR from the newly connected HNB, the UE 30 searches for another HNB and repeats the search until it is connected to an HNB that is not regulated by the CS domain (step S303). If an instruction for requesting a CS call is not input in step S302, the UE 30 does not need to search for another connectable HNB.
  • the user of the UE 30 can use the PS service even if the user cannot use the CS service. Therefore, UE30 can communicate with SGSN in the cell currently located.
  • PS service compared to using a macro cell with a larger communication area than the femto cell, using the femto cell allows the user to get a preferential treatment in terms of billing due to data offload from the femto cell. Obtainable.
  • FIG. 9 is a sequence diagram showing the operation of the communication system of this embodiment.
  • FIG. 10 is a flowchart showing an operation procedure by the UE after the domain restriction in the sequence shown in FIG. A description of the same contents as those described with reference to FIGS. 7 and 8 is omitted.
  • the HNBGW 20 When a failure occurs in the mobile switching center 100 or a transmission path with the mobile switching center 100, the HNBGW 20 causes “user-out-of-service information” or “signaling-point-inaccessible information” (3GPP TS25) in the SCCP layer. .410) is detected, and it is detected that an operation failure has occurred in the SGSN of the mobile switching center 100 (step S201).
  • the HNBGW 20 transmits a domain restriction message of the HNBAP protocol to the HNB 10 (Step 202).
  • the control unit 21 of the HNBGW 20 can use either a CSPS domain restriction message or a message for restricting access to the PS domain as a message for domain restriction.
  • a message for restricting access to the PS domain is referred to as a PS domain restriction message.
  • step S202 when the HNBGW 20 transmits a PS domain restriction message to the HNB 10, the HNB 10 receives the PS domain restriction message from the HNBGW 20.
  • the HNB 10 transmits broadcast information including PS Domain Specific Access Restriction (hereinafter referred to as PS DSAR), which is a message to restrict communication using the PS domain, to the UE 30 in its own cell ( Step S203).
  • PS DSAR PS Domain Specific Access Restriction
  • the UE 30 Upon receiving broadcast information including PS DSAR from the HNB 10, the UE 30 recognizes that a failure has occurred in the SGSN, and transmits an access request signal and a signal such as a location registration signal addressed to the mobile switching center to the HNB 10. Stop (step S204). Since the UE 30 cannot currently use the PS service via the connected HNB 10, the UE 30 searches for another cell in which the PS service can be used in order to use the PS service.
  • FIG. 10 is a flowchart showing an operation procedure of the UE after the PS domain restriction.
  • the UE 30 determines whether or not an instruction for requesting a PS call is input by a user operation (step S402). ).
  • the UE 30 searches for another HNB that can communicate with, unlike the currently connected HNB, and can communicate with another HNB. Connect with HNB.
  • the UE 30 When the UE 30 receives broadcast information including PS DSAR from the newly connected HNB, the UE 30 searches for another HNB and repeats the search until it is connected to an HNB not regulated by the PS domain (step S403). If an instruction for requesting a PS call is not input in step S402, the UE 30 does not need to search for another connectable HNB.
  • the user of the UE 30 can use the CS service even if the user cannot use the PS service. Therefore, the UE 30 can communicate with the MSC in the currently located cell.
  • the femtocell for the use of the CS service, the user can obtain preferential treatment in terms of billing by data offloading from the femtocell compared to the case of using the macrocell.
  • the UE stops transmission of the location registration signal for the SGSN due to the suppression of PS communication. Therefore, an extra signal is sent to the node connected to the network. It becomes possible to reduce the load for coping with this.
  • FIG. 11 shows a state in which UE 30 is in the cell of HNB 10a and UE 30 is about to transmit a location registration signal addressed to mobile switching center 100a.
  • the HNBGW 20a detects a failure of the mobile switching center 100a
  • the HNBGW 20a transmits a domain restriction message to the HNBs 10a and 10b.
  • the HNB 10a receives the domain restriction message from the HNBGW 20a
  • the HNB 10a transmits broadcast information to the UE 30.
  • UE30 will search for other HNB which can be connected, if alerting
  • HNB10b When UE30 enters the cell of HNB10b and UE30 becomes communicable with HNB10b, HNB10b will transmit alert information to UE30.
  • the UE 30 When receiving notification information from the HNB 10b, the UE 30 searches for other connectable HNBs.
  • UE30 enters the cell of HNB10c and UE30 becomes communicable with HNB10c UE30 transmits a location registration signal addressed to mobile switching center 100c via HNB10c. In this way, the operation procedure described with reference to FIGS. 8 and 10 can be performed by the UE 30 in the system having the configuration illustrated in FIG. 11.
  • FIG. 12 is a diagram for explaining another example when the UE performs cell search or reselection.
  • the Node 40 shown in FIG. 12 is a macro cell base station apparatus that constructs a cell with a radius of several kilometers and performs radio communication with the UE 30.
  • the RNC Radio Network Controller
  • the RNC is a wireless control device that focuses and controls the Node 40.
  • FIG. 12 shows a state where UE 30 is in the cell of HNB 10a and UE 30 is about to transmit a location registration signal addressed to mobile switching center 100a.
  • the HNBGW 20a detects a failure of the mobile switching center 100a, the HNBGW 20a transmits a domain restriction message to the HNB 10a.
  • the HNB 10a receives the domain restriction message from the HNBGW 20a, the HNB 10a transmits broadcast information to the UE 30.
  • the UE 30 When the UE 30 receives the broadcast information from the HNB 10a, the UE 30 searches for another connectable radio base station. When the UE 30 enters the cell of the Node 40 and the UE 30 can communicate with the Node 40, the UE 30 transmits a location registration signal to the mobile switching center 50 via the Node 40. In this manner, even in the system having the configuration shown in FIG. 12, it is possible to cause the UE 30 to execute the operation procedure described in FIG. 8 and FIG.
  • the HNBGW when a failure occurs in the mobile switching center or the Iu interface, notifies the HNB that access to the domain of the mobile switching center is being regulated. Information indicating that signal transmission to the domain is restricted is notified from the HNB to the UE. Therefore, the UE that receives the notification stops transmitting signals such as an access request signal and a location registration signal to the mobile switching center. As a result, the UE is restrained from sending signals to the mobile switching center many times, the processing load of the UE is reduced, and the processing load of the HNB and HNBGW that receive signals transmitted from the UE is also reduced.
  • a means for notifying which of the MSC or SGSN of the mobile switching center information about the failure has been defined in the message or parameter transmitted from the HNBGW to the HNB.
  • the domain restriction message transmitted from the MNBGW to the HNB includes the information on the domain to be regulated, thereby completely regulating the cell itself ( It is possible to control access to a domain where a failure has occurred without cell barred. Therefore, even in a state where CS service regulation is performed, the user of the UE can continuously receive the PS service. Similarly, the user can continue to receive the CS service even when the PS service restriction is performed during the SGSN failure.
  • the UE subject to communication restrictions normally stays in the current cell and cannot receive services from the domain. This is because in the current 3G specification, the UE recognizes that the cell itself is normal, and therefore the UE cannot reselect to another cell. In this embodiment, when access to the domain of the service that the user wants to use is restricted, the UE can be reselected to another cell. Therefore, the UE can enjoy the service of the domain via the cell after the change by changing the connection destination to another cell.
  • control unit 21 of the HNBGW 20 has been described as being configured by the CPU 22 executing a program, but a dedicated circuit such as a gate array that enables the operation of the control unit 21 to be executed. It may be configured.
  • the UE 30 and the mobile switching center 100 are shown in the drawings for explaining the operation of the HNB 10 and the HNBGW 20, and this embodiment It is not necessarily included in the configuration of the communication system.
  • HNB Home Node B
  • Control Unit 15 Wireless Communication Unit
  • HNBGW Home Node B Gateway
  • Control unit 30
  • UE User Equipment
  • Terminal control unit 35

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Abstract

This communication system comprises: a gateway apparatus (20) that performs a health check for a mobile exchange station (100) at constant intervals and that, when having detected the occurrence of any trouble in the mobile exchange station (100) or any trouble on the transmission path that connects the gateway apparatus (20) with the mobile exchange station (100), transmits, to a femtocell base station (10), a domain block message that is a message to the effect that the access to the domain of the mobile exchange station (100) is blocked; and the femtocell base station (10) that, when having received the domain block message from the gateway apparatus (20), transmits, to a communication terminal (30) existing in the communication area, via wireless communication, broadcast information including information to the effect that the signal transmission to the mobile exchange station (100) is blocked.

Description

通信システム、ゲートウェイ装置、通信端末および情報処理方法COMMUNICATION SYSTEM, GATEWAY DEVICE, COMMUNICATION TERMINAL, AND INFORMATION PROCESSING METHOD
　本発明は、通信システム、ゲートウェイ装置、通信端末および情報処理方法に関する。 The present invention relates to a communication system, a gateway device, a communication terminal, and an information processing method.
　通信の標準化に関する３ＧＰＰに準拠した通信システムの一例を説明する。図１は関連する通信システムの一構成例を示すブロック図である。 An example of a communication system compliant with 3GPP related to communication standardization will be described. FIG. 1 is a block diagram showing a configuration example of a related communication system.
　図１に示すように、通信システムは、Home　Node　B（以下では、ＨＮＢと表記する）１１０と、Home　Node　B　Gateway（以下では、ＨＮＢＧＷと表記する）１２０とを有する。ＨＮＢ１１０とＨＮＢＧＷ１２０はＩｕｈインタフェースで接続される。ＨＮＢＧＷ１２０はＩｕインタフェースを介して移動体交換局１００と接続される。移動体交換局１００は、図に示さないネットワークに接続されている。 As shown in FIG. 1, the communication system includes a Home Node B (hereinafter referred to as HNB) 110 and a Home Node B Gateway (hereinafter referred to as HNBGW) 120. The HNB 110 and the HNBGW 120 are connected by an Iuh interface. HNBGW 120 is connected to mobile switching center 100 via an Iu interface. The mobile switching center 100 is connected to a network not shown in the figure.
　User　Equipment（以下では、ＵＥと表記する）１３０は、ＨＮＢ１１０と無線通信で接続する移動体通信端末である。 User Equipment (hereinafter referred to as UE) 130 is a mobile communication terminal connected to the HNB 110 through wireless communication.
　ＨＮＢ１１０は半径数十メートル以内を通信圏（以下では、セルと称する）とするフェムトセルを構築する基地局装置である。ＨＮＢＧＷ１２０は、多数のＨＮＢ１１０を集束および制御する装置である。移動体交換局１００は、回線交換機能（Circuit　Switched(以下では、ＣＳと表記する)）を有する基地局、および、パケット交換機能(Packet　Switched(以下、ＰＳと表記する))を有する交換局を含む装置である。 The HNB 110 is a base station device that constructs a femto cell having a radius of several tens of meters within a communication range (hereinafter referred to as a cell). The HNBGW 120 is a device that focuses and controls a large number of HNBs 110. The mobile switching center 100 includes a base station having a circuit switching function (Circuit Switched (hereinafter referred to as CS)) and a switching station having a packet switching function (Packet Switched (hereinafter referred to as PS)). It is a device including.
　移動体交換局１００は、例えば、回線交換（ＣＳ）サービスをユーザに提供するMobile　Service　Switching　Center(以下では、ＭＳＣと表記する)と、パケット交換（ＰＳ）サービスをユーザに提供するServing　General　Packet　Radio　Service　Support　Node(以下では、ＳＧＳＮと表記する)とを含む装置である。 The mobile switching center 100 includes, for example, a Mobile Service Switching Center (hereinafter referred to as MSC) that provides a circuit switching (CS) service to a user, and a Serving General Packet Radio that provides a packet switching (PS) service to a user. It is a device that includes Service Support Node (hereinafter referred to as SGSN).
　ＵＥ１３０は、ＨＮＢ１１０のセルに入ることで、ＨＮＢ１１０と無線通信が可能になると、自分の位置しているセルを移動体交換局１００に登録するための位置登録信号を無線通信でＨＮＢ１１０に一定周期で送信する。位置登録対象となるセルを、以下では、位置登録エリアと称する。ＨＮＢ１１０は、ＵＥ１３０から位置登録信号を受信すると、位置登録信号をＨＮＢＧＷ１２０に転送する。ＨＮＢＧＷ１２０は、ＨＮＢ１１０から受信する位置登録信号を移動体交換局１００に送信する。 When the UE 130 enters the cell of the HNB 110 and wireless communication with the HNB 110 becomes possible, the UE 130 transmits a location registration signal for registering the cell in which it is located in the mobile switching center 100 to the HNB 110 by wireless communication at a constant cycle. Send. A cell that is a location registration target is hereinafter referred to as a location registration area. When the HNB 110 receives the location registration signal from the UE 130, the HNB 110 transfers the location registration signal to the HNBGW 120. HNBGW 120 transmits a location registration signal received from HNB 110 to mobile switching center 100.
　上述のようにしてＵＥ１３０の位置登録の処理が移動体交換局１００で行われると、ＵＥ１３０のユーザはＵＥ１３０を操作してＣＳサービスおよびＰＳサービスを利用することが可能となる。ＣＳドメインおよびＰＳドメインを含むＣＮドメインについての輻輳に対するアクセス規制の方法の一例が、再公表ＷＯ２００７／１１１００９号公報（以下では、特許文献１と称する）に開示されている。 When the location registration process for the UE 130 is performed in the mobile switching center 100 as described above, the user of the UE 130 can operate the UE 130 to use the CS service and the PS service. An example of a method of restricting access to congestion for a CN domain including a CS domain and a PS domain is disclosed in the republished WO2007 / 111007 (hereinafter referred to as Patent Document 1).
　現状のＩｕｈインタフェースにおいて、移動体交換局のＭＳＣおよびＳＧＳＮのうち、いずれか一方、または両方のドメインに動作障害が発生した際、障害発生の通知方法が確立していないため、移動体交換局に動作障害が発生したことをＨＮＢＧＷからＨＮＢに通知することができない。そのため、移動体交換局の動作障害を知らないＵＥは、ＨＮＢおよびＨＮＢＧＷに何度も同じ信号を送信することになり、ＵＥや、ＨＮＢおよびＨＮＢＧＷを含むネットワークノードに負荷がかかるという問題があった。以下に、位置登録信号の場合についての問題を説明する。 In the current Iuh interface, when an operation failure occurs in one or both of the MSC and SGSN of the mobile switching center, a notification method of the failure occurrence has not been established. The HNBGW cannot notify the HNB that an operation failure has occurred. Therefore, the UE that does not know the operation failure of the mobile switching center transmits the same signal to the HNB and the HNBGW many times, and there is a problem that a load is applied to the network node including the UE and the HNB and the HNBGW. . Below, the problem about the case of a location registration signal is demonstrated.
　上述したように、ＵＥは一定周期で位置登録信号を移動体交換局宛に送信する。また、ＵＥの位置が複数の位置登録エリアにまたがっている場合も、ＵＥは頻繁に位置登録信号を移動体交換局宛に送信する。移動体交換局が位置登録信号を処理できない場合、ＵＥは位置登録が無事に処理された旨の通知を移動体交換局から受け取ることができず、ＵＥは、位置登録信号をＨＮＢおよびＨＮＢＧＷを介して移動体交換局に、決められた周期よりも短い周期で繰り返し送信することになる。その結果、ＵＥ側への処理負荷と、ＨＮＢおよびＨＮＢＧＷを含むネットワーク側への処理負荷が増加する。 As described above, the UE transmits a location registration signal to the mobile switching center at regular intervals. Further, even when the position of the UE extends over a plurality of position registration areas, the UE frequently transmits a position registration signal to the mobile switching center. If the mobile switching center is unable to process the location registration signal, the UE cannot receive a notification from the mobile switching center that the location registration has been processed successfully, and the UE sends the location registration signal via the HNB and HNBGW. Thus, it is repeatedly transmitted to the mobile switching center at a cycle shorter than the determined cycle. As a result, the processing load on the UE side and the processing load on the network side including the HNB and HNBGW increase.
　特許文献１に開示された方法では、ＣＮドメインへの輻輳に対して、ＣＳドメイン規制の対象となる通信端末を選別するものであり、障害が発生した移動体交換局についての対策としては不十分である。 The method disclosed in Patent Document 1 selects a communication terminal subject to CS domain restriction against congestion to the CN domain, and is insufficient as a countermeasure for a mobile switching center where a failure has occurred. It is.
　本発明の目的の一つは、移動体交換局に障害が発生したときに、通信端末およびネットワークノードの通信処理負荷を低減可能にした、通信システム、ゲートウェイ装置、通信端末および情報処理方法を提供することである。 One of the objects of the present invention is to provide a communication system, a gateway device, a communication terminal and an information processing method capable of reducing the communication processing load of the communication terminal and the network node when a failure occurs in the mobile switching center. It is to be.
　本発明の一側面の通信システムは、移動体交換局に対して一定の周期でヘルスチェックを行い、移動体交換局における障害または移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをフェムトセル基地局に送信するゲートウェイ装置と、ゲートウェイ装置からドメイン規制メッセージを受信すると、通信圏内の通信端末に対して、移動体交換局への信号送信を規制する旨の情報を含む報知情報を無線通信で送信するフェムトセル基地局と、を有する構成である。 The communication system according to one aspect of the present invention performs a health check on the mobile switching center at a constant cycle, and detects a failure in the mobile switching center or a fault in a transmission path connecting the mobile switching center and the own apparatus. Upon detection, a gateway device that transmits a domain restriction message to the femtocell base station, which is a message that restricts access to the domain of the mobile switching center, and a communication terminal in the communication area upon receiving the domain restriction message from the gateway device On the other hand, there is a femtocell base station that transmits broadcast information including information indicating that signal transmission to the mobile switching center is restricted by wireless communication.
　また、本発明の一側面のゲートウェイ装置は、移動体交換局とフェムトセル基地局との通信を中継するゲートウェイ装置であって、移動体交換局に対して一定の周期でヘルスチェックを行い、移動体交換局における障害または移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをフェムトセル基地局に送信する制御部を有する構成である。 A gateway device according to one aspect of the present invention is a gateway device that relays communication between a mobile switching center and a femtocell base station, and performs a health check on the mobile switching center at a constant cycle to move the mobile switching center. When the occurrence of a failure in the switching center or a failure in the transmission path connecting the mobile switching center and its own device is detected, a domain restriction message, which is a message to restrict access to the domain of the mobile switching center, is sent to the femtocell base. It is the structure which has a control part which transmits to a station.
　また、本発明の一側面の通信端末は、フェムトセル基地局と信号を送受信するための無線通信部と、フェムトセル基地局に接続された移動体交換局に対して信号送信を規制する旨の情報を含む報知情報をフェムトセル基地局から受信すると、移動体交換局への位置登録信号を含む信号の送信を停止する端末制御部と、を有する構成である。 Further, a communication terminal according to one aspect of the present invention regulates signal transmission to a radio communication unit for transmitting / receiving a signal to / from a femtocell base station and a mobile switching center connected to the femtocell base station. A terminal control unit that stops transmission of a signal including a location registration signal to the mobile switching center when broadcast information including information is received from the femtocell base station.
　また、本発明の一側面の情報処理方法は、ゲートウェイ装置およびフェムトセル基地局を有する通信システムによる情報処理方法であって、ゲートウェイ装置が移動体交換局に対して一定の周期でヘルスチェックを行い、ゲートウェイ装置は移動体交換局における障害または移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをフェムトセル基地局に送信し、フェムトセル基地局はゲートウェイ装置からドメイン規制メッセージを受信すると、通信圏内の通信端末に対して、移動体交換局への信号送信を規制する旨の情報を含む報知情報を無線通信で送信するものである。 An information processing method according to one aspect of the present invention is an information processing method using a communication system having a gateway device and a femtocell base station, and the gateway device performs a health check on the mobile switching center at a constant cycle. When the gateway device detects a failure in the mobile switching center or a failure in a transmission path connecting the mobile switching center and the gateway device, the gateway device is a domain restriction message that restricts access to the domain of the mobile switching center. The message is transmitted to the femtocell base station, and when the femtocell base station receives the domain restriction message from the gateway device, the femtocell base station includes information indicating that the signal transmission to the mobile switching center is restricted to the communication terminal within the communication range. Broadcast information is transmitted by wireless communication.
　さらに、本発明の一側面の情報処理方法は、移動体交換局とフェムトセル基地局との通信を中継するゲートウェイ装置による情報処理方法であって、移動体交換局に対して一定の周期でヘルスチェックを行い、移動体交換局における障害または移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをフェムトセル基地局に送信するものである。 Furthermore, an information processing method according to one aspect of the present invention is an information processing method by a gateway device that relays communication between a mobile switching center and a femtocell base station. When a check is made and a failure in the mobile switching center or a failure in the transmission path connecting the mobile switching center and the device itself is detected, a domain restriction message is a message to restrict access to the domain of the mobile switching center. The message is transmitted to the femtocell base station.
図１は関連する通信システムの一構成例を示すブロック図である。FIG. 1 is a block diagram showing a configuration example of a related communication system. 図２は本実施形態の通信システムの一構成例を示すブロック図である。FIG. 2 is a block diagram illustrating a configuration example of the communication system according to the present embodiment. 図３は図２に示したＨＮＢＧＷの一構成例を示すブロック図である。FIG. 3 is a block diagram showing a configuration example of the HNBGW shown in FIG. 図４は本実施形態で導入されたドメイン規制メッセージの一例を示す表である。FIG. 4 is a table showing an example of the domain restriction message introduced in this embodiment. 図５は図２に示したＨＮＢの一構成例を示すブロック図である。FIG. 5 is a block diagram showing an example of the configuration of the HNB shown in FIG. 図６は図２に示したＵＥの一構成例を示すブロック図である。FIG. 6 is a block diagram showing a configuration example of the UE shown in FIG. 図７は本実施形態の通信システムの動作を説明するためのシーケンス図である。FIG. 7 is a sequence diagram for explaining the operation of the communication system of this embodiment. 図８はＣＳドメイン規制後のＵＥによる動作手順を示すフロー図である。FIG. 8 is a flowchart showing an operation procedure by the UE after CS domain restriction. 図９は本実施形態の通信システムの動作を説明するためのシーケンス図である。FIG. 9 is a sequence diagram for explaining the operation of the communication system of this embodiment. 図１０はＰＳドメイン規制後のＵＥによる動作手順を示すフロー図である。FIG. 10 is a flowchart showing an operation procedure by the UE after PS domain regulation. 図１１はＵＥがセルのサーチまたは再選択を行う場合の一例を説明するための図である。FIG. 11 is a diagram for explaining an example when the UE performs cell search or reselection. 図１２はＵＥがセルのサーチまたは再選択を行う場合の別の例を説明するための図である。FIG. 12 is a diagram for explaining another example when the UE performs cell search or reselection.
　本実施形態の通信システムの構成を説明する。図２は本実施形態の通信システムの一構成例を示すブロック図である。 The configuration of the communication system of this embodiment will be described. FIG. 2 is a block diagram illustrating a configuration example of the communication system according to the present embodiment.
　図１に示した構成と同様な構成には同一の符号を付し、その詳細な説明を省略する。また、以下では、本発明の情報処理に関連する部分について、その構成と動作を詳細に説明するものとし、ＵＥ、ＨＮＢ、ＨＮＢＧＷおよび移動体交換局のそれぞれについて、一般的な構成および動作の詳細な説明を省略する。 The same components as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. In the following description, the configuration and operation of a part related to information processing of the present invention will be described in detail, and details of general configuration and operation for each of UE, HNB, HNBGW, and mobile switching center The detailed explanation is omitted.
　図２に示すように、本実施形態の通信システムは、ＨＮＢ１０と、ＨＮＢＧＷ２０とを有する。ＨＮＢ１０とＨＮＢＧＷ２０はＩｕｈインタフェースで接続される。ＨＮＢ１０はＵＥ３０と無線通信で接続される。ＨＮＢＧＷ２０はＩｕインタフェースを介して移動体交換局１００と接続される。移動体交換局１００は、図に示さないネットワークに接続されている。移動体交換局１００におけるドメインとは、ＭＳＣまたはＳＧＳＮを示す。 As shown in FIG. 2, the communication system of the present embodiment includes an HNB 10 and an HNBGW 20. The HNB 10 and the HNBGW 20 are connected by an Iuh interface. The HNB 10 is connected to the UE 30 by radio communication. The HNBGW 20 is connected to the mobile switching center 100 via the Iu interface. The mobile switching center 100 is connected to a network not shown in the figure. The domain in the mobile switching center 100 indicates MSC or SGSN.
　図３は図２に示したＨＮＢＧＷの一構成例を示すブロック図である。 FIG. 3 is a block diagram showing a configuration example of the HNBGW shown in FIG.
　図３に示すように、ＨＮＢＧＷ２０は、制御部２１を有する構成である。制御部２１は、プログラムにしたがって処理を実行するＣＰＵ（Central　Processing　Unit）２２と、プログラムを格納するためのメモリ２３とを含む。メモリ２３には、Ｉｕｈインタフェースを介して伝送されるドメイン規制メッセージが登録されている。 As shown in FIG. 3, the HNBGW 20 is configured to include a control unit 21. The control unit 21 includes a CPU (Central Processing Unit) 22 that executes processing according to a program, and a memory 23 for storing the program. In the memory 23, domain restriction messages transmitted via the Iuh interface are registered.
　図４は本実施形態で導入されたドメイン規制メッセージの一例を示す表である。図４に示すメッセージを、ＨＮＢＡＰ(3GPP　TS25.469)、ＲＵＡ(3GPP　TS25.468)プロトコル、またはＲＡＮＡＰ(3GPP　TS25.413)に定義してもよく、他のプロトコルに定義してもよい。 FIG. 4 is a table showing an example of the domain restriction message introduced in this embodiment. The message shown in FIG. 4 may be defined in HNBAP (3GPP TS25.469), RUA (3GPP TS25.468) protocol, or RANAP (3GPP TS25.413), or may be defined in another protocol.
　本実施形態のドメイン規制メッセージでは、移動体交換局１００のドメイン（例えば、ＭＳＣまたはＳＧＳＮ）に障害が発生したことを通知することを特徴としている。図４に示すように、”CN　Domain　Indicator”および“CN　Domain　Status”のパラメータを導入している。CN　Domain　Indicatorは、3GPP　TS25.468に示されるように、ＣＳドメインまたはＰＳドメインを示す。また、CN　Domain　Statusには、ＣＮドメインの状態として、正常(Normal)か、障害中(Failure)かが設定される。ＣＳドメインの障害はＭＳＣの障害を意味する。ＰＳドメインの障害はＳＧＳＮの障害を意味する。障害の発生したドメインを障害中ドメインと称し、障害の発生していないドメインを正常ドメインと称する。 The domain restriction message of the present embodiment is characterized in that a failure occurs in the domain of the mobile switching center 100 (for example, MSC or SGSN). As shown in Fig. 4, the parameters "CN Domain Indicator" and "CN Domain Status" are introduced. CN Domain Indicator indicates CS domain or PS domain as shown in 3GPP TS25.468. In CN Domain Status, whether the CN domain is normal or failure is set. A CS domain failure means an MSC failure. A PS domain failure means a SGSN failure. A domain in which a failure has occurred is referred to as a failure domain, and a domain in which no failure has occurred is referred to as a normal domain.
　3GPP　REL4では、回線交換サービスを提供するＭＳＣが、ＭＳＣサーバとメディアゲートウェイ（以下では、ＭＧＷと表記する）とを含む構成の場合がある。この場合、回線交換サービスの障害とは、ＭＳＣサーバもしくはＭＧＷの障害、または、これら両方の障害のいずれかを示す。また、障害とは、ノード（装置）自体の障害の場合もあるが、移動体交換局１００およびＨＮＢＧＷ１２０間のＩｕインタフェースにおける伝送路障害の場合も含む。 In 3GPP REL4, the MSC that provides the circuit switching service may be configured to include an MSC server and a media gateway (hereinafter referred to as MGW). In this case, the failure of the circuit switching service indicates either the failure of the MSC server or the MGW, or both of these failures. The failure may be a failure of the node (device) itself, but also includes a failure of a transmission path in the Iu interface between the mobile switching center 100 and the HNBGW 120.
　制御部２１は、移動体交換局１００のＭＳＣおよびＳＧＳＮのそれぞれとの間に、ＳＳＣＯＰ（Service　Specific　Connection　Oriented　Protocol）またはＳＣＴＰ（Stream　Control　Transmission　Protocol）によってシグナリングリンクが設定されており、一定の周期でＭＳＣおよびＳＧＳＮのヘルスチェックを行っている。ＭＳＣまたはＳＧＳＮに障害が発生すると、ＳＳＣＯＰまたはＳＣＴＰでのヘルスチェックでＮＧとなり、制御部２１は、上位のＳＣＣＰ（Skinny　Client　Control　Protocol）レイヤにて対向ノードの障害を検出する。 In the control unit 21, a signaling link is set between the MSC and the SGSN of the mobile switching center 100 by SSCOP (Service Specific Connection Oriented Protocol) or SCTP (Stream Control Transmission Protocol), and at a constant cycle. MSC and SGSN health check. When a failure occurs in the MSC or SGSN, the health check in SSCOP or SCTP becomes NG, and the control unit 21 detects the failure of the opposite node in the higher SCCP (Skinny Client Control Protocol) layer.
　また、制御部２１は、移動体交換局１００またはＩｕインタフェースの障害を検出すると、移動体交換局１００のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをＨＮＢ１０に送信する。 Further, when the control unit 21 detects a failure of the mobile switching center 100 or the Iu interface, the control unit 21 transmits a domain restriction message that is a message for restricting access to the domain of the mobile switching center 100 to the HNB 10.
　図５は図２に示したＨＮＢの一構成例を示すブロック図である。 FIG. 5 is a block diagram showing a configuration example of the HNB shown in FIG.
　図５に示すように、ＨＮＢ１０は、ＵＥ３０と信号を送受信するための無線通信部１５と、制御部１２とを有する。制御部１２は、ＨＮＢＧＷ２０からドメイン規制メッセージを受信すると、自分のセル内にあるＵＥ３０に対して、移動体交換局１００への信号送信を規制する旨の情報を含む報知情報を送信する。なお、制御部１２は、ゲートアレイのような専用回路であってもよく、ＣＰＵがプログラムを実行することで仮想的に構成されてもよい。 As shown in FIG. 5, the HNB 10 includes a radio communication unit 15 and a control unit 12 for transmitting and receiving signals to and from the UE 30. When the control unit 12 receives the domain restriction message from the HNBGW 20, the control unit 12 transmits broadcast information including information indicating that signal transmission to the mobile switching center 100 is restricted to the UE 30 in its own cell. The control unit 12 may be a dedicated circuit such as a gate array, or may be configured virtually by the CPU executing a program.
　図６は図２に示したＵＥの一構成例を示すブロック図である。 FIG. 6 is a block diagram showing a configuration example of the UE shown in FIG.
　図６に示すように、ＵＥ３０は、ＨＮＢ１０と信号を送受信するための無線通信部３５と、端末制御部３２とを有する。端末制御部３２は、ＨＮＢ１０から報知情報を受信すると、移動体交換局１００に対して信号を送信することを停止する。また、端末制御部３２は、ＨＮＢ１０から報知情報を受信した後、他のＨＮＢを探索する。端末制御部３２は、ゲートアレイのような専用回路であってもよく、ＣＰＵがプログラムを実行することで仮想的に構成されてもよい。 As shown in FIG. 6, the UE 30 includes a radio communication unit 35 and a terminal control unit 32 for transmitting and receiving signals to and from the HNB 10. When receiving the broadcast information from the HNB 10, the terminal control unit 32 stops transmitting a signal to the mobile switching center 100. Moreover, the terminal control part 32 searches for other HNB, after receiving alerting | reporting information from HNB10. The terminal control unit 32 may be a dedicated circuit such as a gate array, or may be virtually configured by a CPU executing a program.
　次に、本実施形態の通信システムの動作を説明する。図７は本実施形態の通信システムの動作を示すシーケンス図である。ここでは、移動体交換局１００のＭＳＣに障害が発生した場合とする。図８は、図７に示したシーケンスにおいて、ドメイン規制後のＵＥによる動作手順を示すフロー図である。 Next, the operation of the communication system of this embodiment will be described. FIG. 7 is a sequence diagram showing the operation of the communication system of this embodiment. Here, it is assumed that a failure has occurred in the MSC of the mobile switching center 100. FIG. 8 is a flowchart showing an operation procedure by the UE after the domain restriction in the sequence shown in FIG.
　移動体交換局１００、または移動体交換局１００との伝送路に障害が発生すると、ＨＮＢＧＷ２０は、ＳＣＣＰレイヤで“user-out-of-service　information”または“signaling　-point　-inaccessible　information”(3GPP　TS25.410参照)を受け取り、移動体交換局１００のＭＳＣに動作障害が発生したことを検出する（ステップＳ１０１）。 When a failure occurs in the mobile switching center 100 or a transmission path with the mobile switching center 100, the HNBGW 20 causes “user-out-of-service information” or “signaling-point-inaccessible information” (3GPP TS25) in the SCCP layer. .410) and detects that an operation failure has occurred in the MSC of the mobile switching center 100 (step S101).
　ＨＮＢＧＷ２０は、ＨＮＢＡＰプロトコルのドメイン規制メッセージをＨＮＢ１０に送信する（ステップ１０２）。ただし、ドメイン規制メッセージには、ＨＮＢＡＰに限らず、ＲＡＮＡＰ、ＲＵＡなどの他のプロトコルを使用してもよい。ここで、ＨＮＢＧＷ２０の制御部２１は、ドメイン規制について２種類のメッセージをＨＮＢ１０に送信することが可能である。１つ目はＣＳドメインおよびＰＳドメインの両方についてアクセスを規制するメッセージであり、２つ目はＣＳドメインへのアクセスを規制するメッセージである。以下では、１つ目のメッセージをＣＳＰＳドメイン規制メッセージと称し、２つ目のメッセージをＣＳドメイン規制メッセージと称する。 The HNBGW 20 transmits a domain restriction message of the HNBAP protocol to the HNB 10 (Step 102). However, the domain restriction message is not limited to HNBAP, and other protocols such as RANAP and RUA may be used. Here, the control unit 21 of the HNBGW 20 can transmit two types of messages regarding the domain restriction to the HNB 10. The first is a message that regulates access to both the CS domain and the PS domain, and the second is a message that regulates access to the CS domain. Hereinafter, the first message is referred to as a CSPS domain restriction message, and the second message is referred to as a CS domain restriction message.
　ステップＳ１０２において、ＨＮＢＧＷ２０がＣＳＰＳドメイン規制メッセージをＨＮＢ１０に送信した場合、ＨＮＢ１０は、ＨＮＢＧＷ２０からＣＳＰＳドメイン規制メッセージを受信する。この場合、ＨＮＢ１０は、ＣＳドメインおよびＰＳドメインへのアクセスができないことを示すcell　barredを含む報知情報を自分のセル内のＵＥ３０に送信する（ステップＳ１０３）。 In step S102, when the HNBGW 20 transmits a CSPS domain restriction message to the HNB 10, the HNB 10 receives the CSPS domain restriction message from the HNBGW 20. In this case, the HNB 10 transmits broadcast information including cell barred indicating that access to the CS domain and the PS domain is not possible to the UE 30 in its own cell (step S103).
　ＵＥ３０は、cell　barredを含む報知情報をＨＮＢ１０から受信すると、ＨＮＢ１０に対して、アクセスを要求するための信号であるアクセス要求信号および移動体交換局宛の位置登録信号などの信号の送信を停止する（ステップＳ１０４）。その後、ＵＥ３０は、ＣＳドメインおよびＰＳドメインの両サービスを利用可能な別のＨＮＢに接続する、セルの再選択を行う。 When receiving broadcast information including cell barred from the HNB 10, the UE 30 stops transmission of signals such as an access request signal that is a signal for requesting access to the HNB 10 and a location registration signal addressed to the mobile switching center. (Step S104). After that, the UE 30 performs reselection of a cell connected to another HNB that can use both services of the CS domain and the PS domain.
　ただし、セル再選択（cell　reselection）の対象となるセルは、現在、接続しているセルと同じ周波数のセル(intra　frequency　cell)、異なる周波数のセル(inter　frequency　cell)、異なるシステムのセル(inter　RAT　cell)のいずれであってもよい。 However, the cells subject to cell reselection are currently the same frequency cell as the connected cell (intra frequency cell), a different frequency cell (inter frequency cell), and a different system cell (inter RAT cell).
　一方、ステップＳ１０２において、ＨＮＢＧＷ２０がＣＳドメイン規制メッセージをＨＮＢ１０に送信した場合、ＨＮＢ１０は、ＨＮＢＧＷ２０からＣＳドメイン規制メッセージを受信する。この場合、ＨＮＢ１０は、ＣＳドメインを用いた通信を規制する旨のメッセージであるCS　Domain　Specific　Access　Restriction(以下では、CS　DSARと表記する)を含む報知情報を自分のセル内のＵＥ３０に送信する（ステップＳ１０３）。 On the other hand, when the HNBGW 20 transmits a CS domain restriction message to the HNB 10 in step S102, the HNB 10 receives the CS domain restriction message from the HNBGW 20. In this case, the HNB 10 transmits broadcast information including a CS Domain Specific Access Restriction (hereinafter referred to as CS DSAR), which is a message for restricting communication using the CS domain, to the UE 30 in its own cell ( Step S103).
　ＵＥ３０は、CS　DSARを含む報知情報をＨＮＢ１０から受信すると、ＭＳＣに障害が発生したことを認識し、ＨＮＢ１０に対して、アクセス要求信号および移動体交換局宛の位置登録信号などの信号の送信を停止する（ステップＳ１０４）。ＵＥ３０は、現在、接続しているＨＮＢ１０を介してＣＳサービスを利用することができないので、ＣＳサービスを利用するために、ＣＳサービスが利用可能な別のセルをサーチする。 When receiving broadcast information including CS DSAR from the HNB 10, the UE 30 recognizes that a failure has occurred in the MSC, and transmits a signal such as an access request signal and a location registration signal addressed to the mobile switching center to the HNB 10. Stop (step S104). Since the UE 30 cannot currently use the CS service via the connected HNB 10, the UE 30 searches for another cell in which the CS service can be used in order to use the CS service.
　図８はＣＳドメイン規制後のＵＥの動作手順を示すフロー図である。ＵＥ３０は、ＣＳドメインへの通信が規制されていることを認識した後（ステップＳ３０１）、ユーザの操作により、ＣＳ発呼を要求する旨の指示が入力されるか否かを判定する（ステップＳ３０２）。ＣＳ発呼を要求する旨の指示が入力されると、ＵＥ３０は、現在、接続していたＨＮＢとは異なり、通信可能な他のＨＮＢをサーチし、他のＨＮＢと通信可能であると、そのＨＮＢと接続する。 FIG. 8 is a flowchart showing the operation procedure of the UE after CS domain restriction. After recognizing that communication to the CS domain is restricted (step S301), the UE 30 determines whether or not an instruction for requesting a CS call is input by a user operation (step S302). ). When an instruction for requesting a CS call is input, the UE 30 searches for another HNB that can communicate with, unlike the currently connected HNB, and can communicate with another HNB. Connect with HNB.
　ＵＥ３０は、新たに接続したＨＮＢからCS　DSARを含む報知情報を受信すると、さらに別のＨＮＢをサーチし、ＣＳドメイン規制されていないＨＮＢと接続するまで、サーチを繰り返す（ステップＳ３０３）。なお、ステップＳ３０２で、ＣＳ発呼を要求する旨の指示が入力されない場合、ＵＥ３０は、接続可能な他のＨＮＢをサーチする必要はない。 When the UE 30 receives broadcast information including CS DSAR from the newly connected HNB, the UE 30 searches for another HNB and repeats the search until it is connected to an HNB that is not regulated by the CS domain (step S303). If an instruction for requesting a CS call is not input in step S302, the UE 30 does not need to search for another connectable HNB.
　この場合、ＵＥ３０のユーザはＣＳサービスを利用できなくても、ＰＳサービスを利用することは可能である。そのため、ＵＥ３０は、現在、在圏しているセルでＳＧＳＮと通信可能である。ＰＳサービスを利用する際、通信圏の面積がフェムトセルよりも大きいマクロセルを使用した場合に比べて、フェムトセルを使用することで、フェムトセルからのデータオフロードにより課金面での優遇をユーザは得ることができる。 In this case, the user of the UE 30 can use the PS service even if the user cannot use the CS service. Therefore, UE30 can communicate with SGSN in the cell currently located. When using the PS service, compared to using a macro cell with a larger communication area than the femto cell, using the femto cell allows the user to get a preferential treatment in terms of billing due to data offload from the femto cell. Obtainable.
　移動体交換局１００のＭＳＣに障害が発生した場合、ＣＳ通信を抑制したことにより、ＵＥがＭＳＣ向けの位置登録信号の送信を停止するため、ネットワークに接続されたノードに対して、余分な信号に対処するための負荷を低減させることが可能となる。 When a failure occurs in the MSC of the mobile switching center 100, since the UE stops transmission of the location registration signal for the MSC by suppressing the CS communication, an extra signal is sent to the node connected to the network. It becomes possible to reduce the load for coping with this.
　次に、本実施形態の通信システムにおいて、移動体交換局１００のＳＧＳＮに障害が発生した場合の動作を説明する。図９は本実施形態の通信システムの動作を示すシーケンス図である。図１０は、図９に示したシーケンスにおいて、ドメイン規制後のＵＥによる動作手順を示すフロー図である。なお、図７および図８を参照して説明した動作と重複する内容の説明を省略する。 Next, in the communication system of this embodiment, an operation when a failure occurs in the SGSN of the mobile switching center 100 will be described. FIG. 9 is a sequence diagram showing the operation of the communication system of this embodiment. FIG. 10 is a flowchart showing an operation procedure by the UE after the domain restriction in the sequence shown in FIG. A description of the same contents as those described with reference to FIGS. 7 and 8 is omitted.
　移動体交換局１００、または移動体交換局１００との伝送路に障害が発生すると、ＨＮＢＧＷ２０は、ＳＣＣＰレイヤで“user-out-of-service　information”または“signaling　-point　-inaccessible　information”(3GPP　TS25.410参照)を受け取り、移動体交換局１００のＳＧＳＮに動作障害が発生したことを検出する（ステップＳ２０１）。 When a failure occurs in the mobile switching center 100 or a transmission path with the mobile switching center 100, the HNBGW 20 causes “user-out-of-service information” or “signaling-point-inaccessible information” (3GPP TS25) in the SCCP layer. .410) is detected, and it is detected that an operation failure has occurred in the SGSN of the mobile switching center 100 (step S201).
　ＨＮＢＧＷ２０は、ＨＮＢＡＰプロトコルのドメイン規制メッセージをＨＮＢ１０に送信する（ステップ２０２）。ここで、ＨＮＢＧＷ２０の制御部２１は、ドメイン規制のためのメッセージとして、ＣＳＰＳドメイン規制メッセージと、ＰＳドメインへのアクセスを規制するメッセージのうち、いずれかを使用することが可能である。以下では、ＰＳドメインへのアクセスを規制するメッセージをＰＳドメイン規制メッセージと称する。 The HNBGW 20 transmits a domain restriction message of the HNBAP protocol to the HNB 10 (Step 202). Here, the control unit 21 of the HNBGW 20 can use either a CSPS domain restriction message or a message for restricting access to the PS domain as a message for domain restriction. Hereinafter, a message for restricting access to the PS domain is referred to as a PS domain restriction message.
　なお、ステップＳ２０２において、ＨＮＢＧＷ２０がＨＮＢ１０にＣＳＰＳドメイン規制メッセージを送信した場合の動作は、図７を参照して説明した内容と同様になるため、詳細な説明を省略する。 In addition, since operation | movement when HNBGW20 transmits a CSPS domain control message to HNB10 in step S202 becomes the same as the content demonstrated with reference to FIG. 7, detailed description is abbreviate | omitted.
　ステップＳ２０２において、ＨＮＢＧＷ２０がＰＳドメイン規制メッセージをＨＮＢ１０に送信した場合、ＨＮＢ１０は、ＨＮＢＧＷ２０からＰＳドメイン規制メッセージを受信する。この場合、ＨＮＢ１０は、ＰＳドメインを用いた通信を規制する旨のメッセージであるPS　Domain　Specific　Access　Restriction(以下では、PS　DSARと表記する)を含む報知情報を自分のセル内のＵＥ３０に送信する（ステップＳ２０３）。 In step S202, when the HNBGW 20 transmits a PS domain restriction message to the HNB 10, the HNB 10 receives the PS domain restriction message from the HNBGW 20. In this case, the HNB 10 transmits broadcast information including PS Domain Specific Access Restriction (hereinafter referred to as PS DSAR), which is a message to restrict communication using the PS domain, to the UE 30 in its own cell ( Step S203).
　ＵＥ３０は、PS　DSARを含む報知情報をＨＮＢ１０から受信すると、ＳＧＳＮに障害が発生したことを認識し、ＨＮＢ１０に対して、アクセス要求信号および移動体交換局宛の位置登録信号などの信号の送信を停止する（ステップＳ２０４）。ＵＥ３０は、現在、接続しているＨＮＢ１０を介してＰＳサービスを利用することができないので、ＰＳサービスを利用するために、ＰＳサービスが利用可能な別のセルをサーチする。 Upon receiving broadcast information including PS DSAR from the HNB 10, the UE 30 recognizes that a failure has occurred in the SGSN, and transmits an access request signal and a signal such as a location registration signal addressed to the mobile switching center to the HNB 10. Stop (step S204). Since the UE 30 cannot currently use the PS service via the connected HNB 10, the UE 30 searches for another cell in which the PS service can be used in order to use the PS service.
　図１０はＰＳドメイン規制後のＵＥの動作手順を示すフロー図である。ＵＥ３０は、ＰＳドメインへの通信が規制されていることを認識した後（ステップＳ４０１）、ユーザの操作により、ＰＳ発呼を要求する旨の指示が入力されるか否かを判定する（ステップＳ４０２）。ＰＳ発呼を要求する旨の指示が入力されると、ＵＥ３０は、現在、接続していたＨＮＢとは異なり、通信可能な他のＨＮＢをサーチし、他のＨＮＢと通信可能であると、そのＨＮＢと接続する。 FIG. 10 is a flowchart showing an operation procedure of the UE after the PS domain restriction. After recognizing that communication to the PS domain is restricted (step S401), the UE 30 determines whether or not an instruction for requesting a PS call is input by a user operation (step S402). ). When an instruction for requesting a PS call is input, the UE 30 searches for another HNB that can communicate with, unlike the currently connected HNB, and can communicate with another HNB. Connect with HNB.
　ＵＥ３０は、新たに接続したＨＮＢからPS　DSARを含む報知情報を受信すると、さらに別のＨＮＢをサーチし、ＰＳドメイン規制されていないＨＮＢと接続するまで、サーチを繰り返す（ステップＳ４０３）。なお、ステップＳ４０２で、ＰＳ発呼を要求する旨の指示が入力されない場合、ＵＥ３０は、接続可能な他のＨＮＢをサーチする必要はない。 When the UE 30 receives broadcast information including PS DSAR from the newly connected HNB, the UE 30 searches for another HNB and repeats the search until it is connected to an HNB not regulated by the PS domain (step S403). If an instruction for requesting a PS call is not input in step S402, the UE 30 does not need to search for another connectable HNB.
　この場合、ＵＥ３０のユーザはＰＳサービスを利用できなくても、ＣＳサービスを利用することは可能である。そのため、ＵＥ３０は、現在、在圏しているセルでＭＳＣと通信可能である。ＣＳサービスの利用にフェムトセルを使用することで、マクロセルを使用した場合に比べて、フェムトセルからのデータオフロードにより課金面での優遇をユーザは得ることができる。 In this case, the user of the UE 30 can use the CS service even if the user cannot use the PS service. Therefore, the UE 30 can communicate with the MSC in the currently located cell. By using the femtocell for the use of the CS service, the user can obtain preferential treatment in terms of billing by data offloading from the femtocell compared to the case of using the macrocell.
　移動体交換局１００のＳＧＳＮに障害が発生した場合、ＰＳ通信を抑制したことにより、ＵＥがＳＧＳＮ向けの位置登録信号の送信を停止するため、ネットワークに接続されたノードに対して、余分な信号に対処するための負荷を低減させることが可能となる。 When a failure occurs in the SGSN of the mobile switching center 100, the UE stops transmission of the location registration signal for the SGSN due to the suppression of PS communication. Therefore, an extra signal is sent to the node connected to the network. It becomes possible to reduce the load for coping with this.
　次に、ＣＳまたはＰＳドメインの規制後に、ＵＥ３０が他の移動体交換局のセルのサーチまたは再選択する場合を、図１１を参照して説明する。 Next, a case where the UE 30 searches for or reselects a cell of another mobile switching center after the restriction of the CS or PS domain will be described with reference to FIG.
　移動体交換局１００ａ、１００ｃはネットワーク３００に接続されている。移動体交換局１００ａに障害が発生し、移動体交換局１００ｃには障害が発生していないものとする。図１１は、ＵＥ３０がＨＮＢ１０ａのセル内にあり、ＵＥ３０が移動体交換局１００ａ宛に位置登録信号を送信しようとしている状態を示す。ＨＮＢＧＷ２０ａは、移動体交換局１００ａの障害を検出すると、ドメイン規制メッセージをＨＮＢ１０ａ、１０ｂに送信する。ＨＮＢ１０ａはＨＮＢＧＷ２０ａからドメイン規制メッセージを受信すると、報知情報をＵＥ３０に送信する。 The mobile switching centers 100a and 100c are connected to the network 300. It is assumed that a failure has occurred in the mobile switching center 100a and no failure has occurred in the mobile switching center 100c. FIG. 11 shows a state in which UE 30 is in the cell of HNB 10a and UE 30 is about to transmit a location registration signal addressed to mobile switching center 100a. When the HNBGW 20a detects a failure of the mobile switching center 100a, the HNBGW 20a transmits a domain restriction message to the HNBs 10a and 10b. When the HNB 10a receives the domain restriction message from the HNBGW 20a, the HNB 10a transmits broadcast information to the UE 30.
　ＵＥ３０は、ＨＮＢ１０ａから報知情報を受信すると、接続可能な他のＨＮＢを探す。ＵＥ３０がＨＮＢ１０ｂのセル内に入り、ＵＥ３０がＨＮＢ１０ｂと通信可能になると、ＨＮＢ１０ｂは報知情報をＵＥ３０に送信する。ＵＥ３０は、ＨＮＢ１０ｂから報知情報を受信すると、接続可能な他のＨＮＢを探す。ＵＥ３０がＨＮＢ１０ｃのセル内に入り、ＵＥ３０がＨＮＢ１０ｃと通信可能になると、ＵＥ３０は、移動体交換局１００ｃ宛に位置登録信号をＨＮＢ１０ｃを介して送信する。このようにして、図８および図１０で説明した動作手順を、図１１に示す構成のシステムにおいて、ＵＥ３０に実行させることが可能である。 UE30 will search for other HNB which can be connected, if alerting | reporting information is received from HNB10a. When UE30 enters the cell of HNB10b and UE30 becomes communicable with HNB10b, HNB10b will transmit alert information to UE30. When receiving notification information from the HNB 10b, the UE 30 searches for other connectable HNBs. When UE30 enters the cell of HNB10c and UE30 becomes communicable with HNB10c, UE30 transmits a location registration signal addressed to mobile switching center 100c via HNB10c. In this way, the operation procedure described with reference to FIGS. 8 and 10 can be performed by the UE 30 in the system having the configuration illustrated in FIG. 11.
　次に、ＵＥ３０がセルの再選択を行う際、異なるシステムのセルも再選択の対象になる場合の一例を説明する。図１２はＵＥがセルのサーチまたは再選択を行う場合の別の例を説明するための図である。 Next, an example will be described in which when the UE 30 performs cell reselection, cells of different systems are also subject to reselection. FIG. 12 is a diagram for explaining another example when the UE performs cell search or reselection.
　図１２に示すＮｏｄｅ４０は、通信圏を半径数キロメートルとしたセルを構築し、ＵＥ３０と無線通信を行うマクロセルの基地局装置である。ＲＮＣ（Radio　Network　Controller）は、Ｎｏｄｅ４０を集束および制御する無線制御装置である。 The Node 40 shown in FIG. 12 is a macro cell base station apparatus that constructs a cell with a radius of several kilometers and performs radio communication with the UE 30. The RNC (Radio Network Controller) is a wireless control device that focuses and controls the Node 40.
　移動体交換局１００ａ、５０はネットワーク３００に接続されている。移動体交換局１００ａに障害が発生し、移動体交換局５０には障害が発生していないものとする。図１２は、ＵＥ３０がＨＮＢ１０ａのセル内にあり、ＵＥ３０が移動体交換局１００ａ宛に位置登録信号を送信しようとしている状態を示す。ＨＮＢＧＷ２０ａは、移動体交換局１００ａの障害を検出すると、ドメイン規制メッセージをＨＮＢ１０ａに送信する。ＨＮＢ１０ａはＨＮＢＧＷ２０ａからドメイン規制メッセージを受信すると、報知情報をＵＥ３０に送信する。 The mobile switching centers 100a and 50 are connected to the network 300. It is assumed that a failure has occurred in the mobile switching center 100a and no failure has occurred in the mobile switching center 50. FIG. 12 shows a state where UE 30 is in the cell of HNB 10a and UE 30 is about to transmit a location registration signal addressed to mobile switching center 100a. When the HNBGW 20a detects a failure of the mobile switching center 100a, the HNBGW 20a transmits a domain restriction message to the HNB 10a. When the HNB 10a receives the domain restriction message from the HNBGW 20a, the HNB 10a transmits broadcast information to the UE 30.
　ＵＥ３０は、ＨＮＢ１０ａから報知情報を受信すると、接続可能な他の無線基地局を探す。ＵＥ３０がＮｏｄｅ４０のセル内に入り、ＵＥ３０がＮｏｄｅ４０と通信可能になると、ＵＥ３０は、移動体交換局５０宛に位置登録信号をＮｏｄｅ４０を介して送信する。このようにして、図１２に示す構成のシステムにおいても、図８および図１０で説明した動作手順を、ＵＥ３０に実行させることが可能である。 When the UE 30 receives the broadcast information from the HNB 10a, the UE 30 searches for another connectable radio base station. When the UE 30 enters the cell of the Node 40 and the UE 30 can communicate with the Node 40, the UE 30 transmits a location registration signal to the mobile switching center 50 via the Node 40. In this manner, even in the system having the configuration shown in FIG. 12, it is possible to cause the UE 30 to execute the operation procedure described in FIG. 8 and FIG.
　本実施形態によれば、移動体交換局またはＩｕインタフェースに障害が発生すると、移動体交換局のドメインへのアクセスが規制中であることがＨＮＢＧＷからＨＮＢに通知され、さらに、移動体交換局のドメインへの信号送信を規制する旨の情報がＨＮＢからＵＥに通知される。そのため、その通知を受けたＵＥは移動体交換局へのアクセス要求信号や位置登録信号などの信号を送信することを停止する。その結果、ＵＥが移動体交換局に何度も信号を送ることが抑制され、ＵＥの処理負荷が低減し、ＵＥから送信される信号を受信するＨＮＢおよびＨＮＢＧＷの処理負荷も低減する。 According to the present embodiment, when a failure occurs in the mobile switching center or the Iu interface, the HNBGW notifies the HNB that access to the domain of the mobile switching center is being regulated. Information indicating that signal transmission to the domain is restricted is notified from the HNB to the UE. Therefore, the UE that receives the notification stops transmitting signals such as an access request signal and a location registration signal to the mobile switching center. As a result, the UE is restrained from sending signals to the mobile switching center many times, the processing load of the UE is reduced, and the processing load of the HNB and HNBGW that receive signals transmitted from the UE is also reduced.
　また、本実施形態では、ＨＮＢＧＷからＨＮＢに送信するメッセージまたはパラメータに、移動体交換局のＭＳＣまたはＳＧＳＮのうち、いずれに障害が発生したかの情報を通知するための手段を定義している。移動体交換局のＭＳＣおよびＳＧＳＮのうち、ＭＳＣ障害中において、ＭＮＢＧＷからＨＮＢに送信されるドメイン規制メッセージに、規制対象となるドメインの情報を含むようにすることで、完全にセル自体を規制（Cell　barred）することなく、障害の発生したドメインへのアクセス規制を実現できる。そのため、ＣＳサービス規制が行われている状態でも、ＵＥのユーザは、ＰＳサービスを継続して受けることが可能である。これと同様に、ＳＧＳＮ障害中にＰＳサービス規制が行われている状態でも、ユーザは、ＣＳサービスを継続して受けることが可能である。 Also, in this embodiment, a means for notifying which of the MSC or SGSN of the mobile switching center information about the failure has been defined in the message or parameter transmitted from the HNBGW to the HNB. In the MSC and SGSN of the mobile switching center, in the MSC failure, the domain restriction message transmitted from the MNBGW to the HNB includes the information on the domain to be regulated, thereby completely regulating the cell itself ( It is possible to control access to a domain where a failure has occurred without cell barred. Therefore, even in a state where CS service regulation is performed, the user of the UE can continuously receive the PS service. Similarly, the user can continue to receive the CS service even when the PS service restriction is performed during the SGSN failure.
　通信規制を受けたＵＥは、通常であれば、現在のセルにとどまり、ドメインからのサービスを受けることはできない。これは、現状の３Ｇ仕様では、セル自体は正常であるとＵＥに認識されているため、ＵＥは別のセルへ再選択ができないためである。本実施形態では、ユーザが使用したいサービスのドメインへのアクセスが規制されている場合、ＵＥを別のセルに再選択させることを可能としている。そのため、ＵＥは、接続先を別のセルに変更することで、変更後のセルを介して、そのドメインのサービスを享受することが可能となる。 The UE subject to communication restrictions normally stays in the current cell and cannot receive services from the domain. This is because in the current 3G specification, the UE recognizes that the cell itself is normal, and therefore the UE cannot reselect to another cell. In this embodiment, when access to the domain of the service that the user wants to use is restricted, the UE can be reselected to another cell. Therefore, the UE can enjoy the service of the domain via the cell after the change by changing the connection destination to another cell.
　なお、本実施形態では、ＨＮＢＧＷ２０の制御部２１を、ＣＰＵ２２がプログラムを実行することで構成される場合で説明したが、制御部２１による動作を実行可能にした、ゲートアレイのような専用回路で構成してもよい。 In the present embodiment, the control unit 21 of the HNBGW 20 has been described as being configured by the CPU 22 executing a program, but a dedicated circuit such as a gate array that enables the operation of the control unit 21 to be executed. It may be configured.
　また、本実施形態の通信システムでは、図２に示した構成のうち、ＵＥ３０および移動体交換局１００は、ＨＮＢ１０およびＨＮＢＧＷ２０の動作を説明するために図に示されたものであり、本実施形態の通信システムの構成に必ずしも含まれていなくてよい。 In the communication system of the present embodiment, among the configurations shown in FIG. 2, the UE 30 and the mobile switching center 100 are shown in the drawings for explaining the operation of the HNB 10 and the HNBGW 20, and this embodiment It is not necessarily included in the configuration of the communication system.
　本発明の効果の一例として、移動体交換局に障害が発生したときに、通信端末やネットワークノードに生じる通信処理の負荷を低減できる。 As an example of the effect of the present invention, it is possible to reduce the load of communication processing that occurs in a communication terminal or network node when a failure occurs in a mobile switching center.
　以上、実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されるものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.
　なお、この出願は、２０１０年８月６日に出願された日本出願の特願２０１０－１７７４８６の内容が全て取り込まれており、この日本出願を基礎として優先権を主張するものである。 Note that this application incorporates all the contents of Japanese Patent Application No. 2010-177486, filed on August 6, 2010, and claims priority based on this Japanese application.
　１０　　ＨＮＢ（Home　Node　B）
　１２　　制御部
　１５　　無線通信部
　２０　　ＨＮＢＧＷ（Home　Node　B　Gateway）
　２１　　制御部
　３０　　ＵＥ（User　Equipment）
　３２　　端末制御部
　３５　　無線通信部 10 HNB (Home Node B)
12 Control Unit 15 Wireless Communication Unit 20 HNBGW (Home Node B Gateway)
21 Control unit 30 UE (User Equipment)
32 Terminal control unit 35 Wireless communication unit

Claims (9)

  1. 　移動体交換局に対して一定の周期でヘルスチェックを行い、該移動体交換局における障害または該移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、該移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージをフェムトセル基地局に送信するゲートウェイ装置と、
    　前記ゲートウェイ装置から前記ドメイン規制メッセージを受信すると、通信圏内の通信端末に対して、前記移動体交換局への信号送信を規制する旨の情報を含む報知情報を無線通信で送信する前記フェムトセル基地局と、
    を有する通信システム。     When a health check is performed on the mobile switching center at a constant period and a failure in the mobile switching center or a failure in a transmission path connecting the mobile switching center and the own apparatus is detected, the mobile switching center A gateway device that transmits a domain restriction message that is a message to restrict access to the domain to the femtocell base station;
    When the domain restriction message is received from the gateway device, the femtocell base that transmits broadcast information including information indicating that signal transmission to the mobile switching center is restricted by radio communication to a communication terminal within a communication area Bureau,
    A communication system.
  2. 　移動体交換局とフェムトセル基地局との通信を中継するゲートウェイ装置であって、
    　前記移動体交換局に対して一定の周期でヘルスチェックを行い、該移動体交換局における障害または該移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、該移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージを前記フェムトセル基地局に送信する制御部を有するゲートウェイ装置。     A gateway device that relays communication between a mobile switching center and a femtocell base station,
    When a health check is performed on the mobile switching center at a certain period and a failure in the mobile switching center or a failure in a transmission path connecting the mobile switching center and the own device is detected, the mobile switching A gateway apparatus having a control unit that transmits a domain restriction message, which is a message for restricting access to a station domain, to the femtocell base station.
  3. 　請求項２記載のゲートウェイ装置において、
    　前記移動体交換局が複数のドメインを有し、
    　前記制御部は、
    　前記複数のドメインのうち、いずれかのドメインの障害を検出すると、障害の発生したドメインを示す情報を含む前記ドメイン規制メッセージを前記フェムトセル基地局に送信する、ゲートウェイ装置。     The gateway device according to claim 2, wherein
    The mobile switching center has a plurality of domains;
    The controller is
    When a failure in any one of the plurality of domains is detected, the gateway device transmits the domain restriction message including information indicating the failed domain to the femtocell base station.
  4. 　フェムトセル基地局と信号を送受信するための無線通信部と、
    　前記フェムトセル基地局に接続された移動体交換局に対して信号送信を規制する旨の情報を含む報知情報を前記フェムトセル基地局から受信すると、前記移動体交換局への位置登録信号を含む信号の送信を停止する端末制御部と、
    を有する通信端末。     A wireless communication unit for transmitting and receiving signals to and from the femtocell base station;
    When broadcast information including information for restricting signal transmission to the mobile switching center connected to the femtocell base station is received from the femtocell base station, a location registration signal to the mobile switching center is included. A terminal control unit that stops signal transmission;
    A communication terminal.
  5. 　請求項４記載の通信端末において、
    　前記端末制御部は、
    　前記フェムトセル基地局から前記報知情報を受信すると、該フェムトセル基地局とは異なる他のフェムトセル基地局を探索する、通信端末。     The communication terminal according to claim 4, wherein
    The terminal control unit
    A communication terminal that, when receiving the broadcast information from the femtocell base station, searches for another femtocell base station different from the femtocell base station.
  6. 　請求項４記載の通信端末において、
    　前記移動体交換局が複数のドメインを有し、
    　前記端末制御部は、
    　前記フェムトセル基地局から受信する前記報知情報に、障害が発生したドメインである障害中ドメインを示す情報が含まれていると、該障害中ドメインを使用する旨の指示が入力されるか否かを判定し、該障害中ドメインを使用する旨の指示が入力される場合、該フェムトセル基地局とは異なる他のフェムトセル基地局を探索し、前記複数のドメインのうち、該障害中ドメイン以外のドメインである正常ドメインを使用する旨の指示が入力されると、前記フェムトセル基地局を介して位置登録信号を前記移動体交換局の該正常ドメインに送信する、通信端末。     The communication terminal according to claim 4, wherein
    The mobile switching center has a plurality of domains;
    The terminal control unit
    Whether the broadcast information received from the femtocell base station includes information indicating a failed domain that is a failed domain, whether or not an instruction to use the failed domain is input And when an instruction to use the faulty domain is input, search for another femtocell base station different from the femtocell base station, and out of the plurality of domains other than the faulty domain A communication terminal that transmits a location registration signal to the normal domain of the mobile switching center via the femtocell base station when an instruction to use a normal domain that is a domain of the mobile domain is input.
  7. 　請求項４から６のいずれか１項記載の通信端末において、
    　前記端末制御部は、
    　前記フェムトセル基地局から前記報知情報を受信すると、該フェムトセル基地局よりも通信圏の面積が大きい基地局であるマクロセル基地局を探索する、通信端末。     The communication terminal according to any one of claims 4 to 6,
    The terminal control unit
    A communication terminal that, when receiving the broadcast information from the femtocell base station, searches for a macrocell base station that is a base station having a larger communication area than the femtocell base station.
  8. 　ゲートウェイ装置およびフェムトセル基地局を有する通信システムによる情報処理方法であって、
    　前記ゲートウェイ装置が、移動体交換局に対して一定の周期でヘルスチェックを行い、
    　前記ゲートウェイ装置が、前記移動体交換局における障害または該移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、該移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージを前記フェムトセル基地局に送信し、
    　前記フェムトセル基地局が、前記ゲートウェイ装置から前記ドメイン規制メッセージを受信すると、通信圏内の通信端末に対して、前記移動体交換局への信号送信を規制する旨の情報を含む報知情報を無線通信で送信する、情報処理方法。     An information processing method by a communication system having a gateway device and a femtocell base station,
    The gateway device performs a health check on the mobile switching center at a constant cycle,
    When the gateway device detects a failure in the mobile switching center or a failure in a transmission path connecting the mobile switching center and the own device, a message that regulates access to the domain of the mobile switching center A domain restriction message is sent to the femtocell base station,
    When the femtocell base station receives the domain restriction message from the gateway device, wireless communication is performed with broadcast information including information indicating that signal transmission to the mobile switching center is restricted to communication terminals within a communication area. Information processing method to be transmitted by
  9. 　移動体交換局とフェムトセル基地局との通信を中継するゲートウェイ装置による情報処理方法であって、
    　前記移動体交換局に対して一定の周期でヘルスチェックを行い、
    　前記移動体交換局における障害または該移動体交換局と自装置を接続する伝送路における障害の発生を検出すると、該移動体交換局のドメインへのアクセスを規制する旨のメッセージであるドメイン規制メッセージを前記フェムトセル基地局に送信する、情報処理方法。     An information processing method by a gateway device that relays communication between a mobile switching center and a femtocell base station,
    Perform a health check on the mobile switching center at regular intervals,
    When a failure in the mobile switching center or occurrence of a failure in a transmission path connecting the mobile switching center and its own device is detected, a domain restriction message is a message to restrict access to the domain of the mobile switching center Is transmitted to the femtocell base station.
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