JP5536694B2 - Mobile communication system, radio network control apparatus, service providing GPRS support node, and mobile communication method - Google Patents

Description

  The present invention relates to a mobile communication system, a radio network control apparatus, a service providing GPRS support node, and a mobile communication method that adopt the Iu Flex scheme and perform combine location registration, and in particular, an RC (radio network) in which a mobile terminal apparatus is located. Mobile communication system, radio network controller, and service providing GPRS that enable communication in the CS (circuit switching) domain even when a failure occurs in the circuit between the control device) and the MSC (voice switch) The present invention relates to a support node and a mobile communication method.

In mobile communication systems, standardization of communication protocols, sharing of network setting information, standardization of interconnection test conditions, and the like have been implemented by international standardization organizations such as 3GPP / GSMA.
In the VLR system defined as a network system in a mobile communication system, subscriber information is downloaded to a VLR attached to each exchange upon location registration, and the location information and subscriber information of the mobile device are managed.

In recent years, a distributed processing method called Iu Flex has been proposed for this VLR method (see, for example, Non-Patent Document 1).
Iu Flex is a CN that allows each RNC to be selectively connected to each of a plurality of serving GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs). It is a method that made it possible to be connected to.

Here, RNC (Radio Network Controller) is a radio network controller that controls Node B (base station apparatus). A CN (Core Network) is a network including an MSC (Mobile Switching Center) and an SGSN (Serving GPRS (General Packet Radio Service) Support Node).
A set of a plurality of RNCs managed in common by a plurality of SGSNs and a set of a plurality of RNCs managed in common by a plurality of MSCs are referred to as a pool-area.

In Iu Flex, even if any node in the CN fails, it is possible to avoid complete disconnection of a specific area related to the node. In addition, there is an advantage that it is possible to suppress the transmission / reception of control signals and the increase in the scale of equipment.
FIG. 5 is a configuration diagram showing the configuration of a conventional mobile communication system that adopts the Iu Flex method and has specifications for performing combine location registration.

In the combined location registration (Combined Update), when performing location registration from the mobile terminal device to the CS domain, the SGSN of the PS domain receives the location registration request, and the SGSN performs location registration processing for the CS domain. .
The location registration area 110 is defined by a plurality of RAN (Radio Access Network) nodes 111, 112, 113, and 114 that cover the location registration area 110.

Of these RAN nodes 111, 112, 113, and 114, RAN nodes 111 and 112 are under the control of one RNC 121, and RAN nodes 113 and 114 are under the control of another RNC 122. .
SGSN (# 1) 131 and SGSN (# 2) 132 corresponding to these RNCs 121 and 122 are provided.

Since the mobile communication system of FIG. 5 adopts the Iu Flex scheme, each of the RNCs 121 and 122 can selectively connect to any SGSN of SGSN (# 1) 131 and SGSN (# 2) 132. .
Further, in the state illustrated in FIG. 5, the profile (SG) (# 2) 132 (the VLR incidental to SGSN (# 2) 132 of SGSN (# 1) 131 and SGSN (# 2) 132), which is information relating to the mobile terminal device ( (Indicated as “PF” in the figure).
The SGSN (# 1) 131 and SGSN (# 2) 132 described above can be selectively connected to any of the MSC (# 1) 141 and the MSC (# 2) 142 provided in correspondence thereto. is there.

In the state illustrated in FIG. 5, the profile PF related to the mobile terminal apparatus is already held in the MSC (# 2) 142 (VLR attached thereto).
In FIG. 5, the mobile terminal device moves to any one of the RAN nodes 111, 112, 113, and 114 (here, RAN node) in the location registration area 110 when a movement or other predetermined trigger arrives. A location registration request is transmitted to the RNC 122 through the node 114). In this example, the RNC 122 that has received the location registration request transmits the location registration request to the SGSN (# 2) 132 in which the profile PF is already held (arrow A51).

SGSN (# 2) 132 further transmits a location registration request to MSC (# 2) 142 in which profile PF is already held among MSC (# 1) 141 and MSC (# 2) 142 (arrow line) A52).
The situation described with reference to FIG. 5 assumes a case where a failure occurs in a so-called Iu section that is a route between the RNC 122 and the MSC (# 2) 142. Here, the failure in the Iu section is a state in which regular communication is disabled due to a malfunction in hardware related to the switch, router, or port corresponding to this section.

  Under this assumption, the RAN node 114 passes through the RNC 122 (arrow A53), and further passes through the Iu section where the failure has occurred as described above (arrow A54) to reach the MSC (# 2) 142. Communication in the CS domain on the route cannot be performed, and this route is not avoided in the location registration process. In this case, the transmission in the CS domain takes a form in which the RNC transmits a signal to another MSC. However, since there is no profile, call processing becomes impossible, and combine location registration is performed. Here, since the pair of RNC and MSC in which the section failure has occurred is selected again, there arises a problem that the recovery is not performed.

Next, the operation of the mobile communication system of FIG. 5 will be described in more detail with reference to FIG.
FIG. 6 is a sequence chart showing the operation of combine position registration in the mobile communication system of FIG.
The mobile terminal device sends a signal for initial setting “Initial Direct Transfer” to the RNC 122 (step S601).
The RNC 122 that has received the signal in step S601 sends an “Initial UE Message” signal, that is, a signal for requesting initial setting between the RNC and the MSC / SGSN, to the service providing GPRS support node SGSN (# 2) 132. Supply (step S602).
Next, the mobile terminal device transmits a “Routing Area Update Request”, which is a PS domain location registration signal, to the SGSN (# 2) 132 in order to perform the above-described combine location registration (step S603).

  In response to the location registration signal in step S603, the SGSN (# 2) 132 should transmit the location registration request to the MSC (# 2) 142 in which the profile PF is already held. A failure has occurred in a so-called Iu section that is a path between the RNC 122 and the MSC (# 2) 142. However, in the conventional mobile communication system, it is determined that it is not necessary to perform transmission to the MSC (# 2) 142 corresponding to the route in which the failure occurs in the profile held by the SGSN (# 2) 132. Therefore, the location registration request is not executed in the MSC (# 2) 142.

Then, the SGSN (# 2) 132 returns a signal “Routing Area Update Accept” to the mobile terminal device and ends the location registration (step S604).
Thus, in the conventional mobile communication system, when a failure occurs in the Iu section between the RNC 122 and the MSC (# 2) 142 while adopting the Iu Flex scheme, the SGSN (# 2) From 132 to the MSC (# 2) 142, the location registration process bypassing this failure is not executed, and communication in the CS domain is not possible.

3GPP standard specification TS 23.236 `` Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes ''

As described above, in a mobile communication system that applies the conventional Iu Flex method and performs combined location registration (Combined Update), a failure occurs in a so-called Iu section that is a route between the MSC and the RNC. Will not be able to communicate in the CS domain.
In addition, in the conventional health check, in addition to the corresponding individual nodes, failure diagnosis and countermeasures at the time of failure occurrence are performed for adjacent nodes and adjacent sections. There was no means of detection or coping with the failure. That is, in the SGSN, health checks are performed on the SGSN itself (individual nodes), MSC and RNC (adjacent nodes), between SGSN and RNC, and between SGSN and MSC (adjacent sections). The MSC to RNC are not adjacent to each other, but are subject to confirmation in the present invention described later.

  The present invention has been made in view of the situation as described above, and is a so-called Iu that is a path between an MSC and an RNC in a mobile communication system that applies the Iu Flex scheme and performs combined location registration (Combined Update). To provide a communication mobile communication system, a radio network controller, a service providing GPRS support node, and a mobile communication method capable of ensuring communication in the CS domain even when a failure occurs in a section Yes.

In order to solve the above problems, the following technologies are proposed.
(1) Each of a plurality of radio network controllers (RNC) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively used. When a location registration is performed from a mobile terminal apparatus to a mobile service switching center in a CS domain, the service provision GPRS support node in the PS domain receives a location registration request. A mobile communication system that performs combine location registration in which a service providing GPRS support node performs location registration processing for a CS domain,
Prior to transmitting a location registration request to any one of the service providing GPRS support nodes, the radio network control device applies health check information corresponding to the mobile service switching center connected to the own device. Notify the service providing GPRS support node,
The corresponding service providing GPRS support node selects a mobile service exchange center as a transmission destination of the location registration request based on the notified health check information.

  In the mobile communication system of (1) above, when transmitting the location registration request transmitted from the mobile terminal device to the mobile service switching center selected by the service providing GPRS support node through the wireless network control device, the wireless network control device in advance. The mobile service exchange center that is the transmission destination of the location registration request is selected based on the health check information between the wireless network control device and the mobile service exchange center notified from the above.

(2) Each of a plurality of radio network controllers (RNC) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively used. When a location registration is performed from a mobile terminal apparatus to a mobile service switching center in a CS domain, the service provision GPRS support node in the PS domain receives a location registration request. The radio network controller applied to a mobile communication system for performing combine location registration in which a service providing GPRS support node performs location registration processing for a CS domain,
A health check information holding unit for holding health check information including items relating to health check between the mobile device and the mobile service exchange center connected to the own device;
Prior to transmitting a location registration request to any one of the service providing GPRS support nodes, health check information for notifying the corresponding service providing GPRS support node of the corresponding health check information held in the health check information holding unit A notification unit;
A wireless network control device comprising:

In the wireless network control device of (2) above, the health check information holding unit holds health check information including items relating to health check with the mobile service switching center connected to the own device.
Also, prior to transmitting a location registration request to any of the service providing GPRS support nodes, the corresponding health check information held in the health check information holding unit is sent to the corresponding health check information in the health check information notifying unit. Notify the provided GPRS support node.

  Accordingly, when the location registration request transmitted from the mobile terminal device is transmitted to the mobile service switching center selected by the service providing GPRS support node through the radio network control device, the health notification notified in the service providing GPRS support node Based on the check information, the mobile service switching center that is the transmission destination of the location registration request is selected.

(3) Each of a plurality of radio network controllers (RNC) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively used. When a location registration is performed from a mobile terminal apparatus to a mobile service switching center in a CS domain, the service provision GPRS support node in the PS domain receives a location registration request. The service providing GPRS support node is applied to a mobile communication system that performs combine location registration in which a service provision GPRS support node performs location registration processing on a CS domain,
A health check information receiving unit that receives notification of health check information including items related to health check between the wireless network control device and the mobile service switching center connected to the wireless network control device;
A location registration request transmission destination selection unit that selects the mobile service exchange center as a transmission destination of the location registration request based on the health check information received by the health check information reception unit;
A service providing GPRS support node, comprising:

In the service providing GPRS support node of (3) above, the health check information receiving unit performs a health check between the corresponding wireless network control device and the mobile service switching center connected to the wireless network control device. Notification of health check information including items related to
In addition, the location registration request transmission destination selection unit selects the mobile service exchange center as a transmission destination of the location registration request based on the health check information received by the health check information reception unit.
Thus, the health check information is reflected when selecting the mobile service switching center as the transmission destination of the location registration request.

(4) Each of a plurality of radio network controllers (RNC) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively used. When a location registration is performed from a mobile terminal apparatus to a mobile service switching center in a CS domain, the service provision GPRS support node in the PS domain receives a location registration request. A mobile communication method in a mobile communication system for performing combine location registration in which a service providing GPRS support node performs location registration processing on a CS domain,
Prior to the wireless network control device transmitting a location registration request to any one of the service providing GPRS support nodes, the health check information corresponding to the mobile service switching center connected to the own device is applicable. A health check information notifying step for notifying the service providing GPRS support node;
Location registration request transmission destination selection step in which the corresponding service providing GPRS support node selects a mobile service switching center as a transmission destination of the location registration request based on the health check information notified in the health check information notification step When,
A mobile communication method comprising:

In the mobile communication method of (4) above, in the health check information notification step, the wireless network control device is connected to its own device prior to transmitting a location registration request to any of the service providing GPRS support nodes. Health check information with the mobile service switching center is notified to the corresponding service providing GPRS support node.
Further, in the location registration request transmission destination selection step, the corresponding service providing GPRS support node makes the location registration request transmission destination based on the health check information notified in the health check information notification step. Select an exchange center.
Thus, the health check information is reflected when selecting the mobile service switching center as the transmission destination of the location registration request.

  In a mobile communication system that applies the Iu Flex method and performs combined location registration (Combined Update), communication in the CS domain can be performed even when a failure occurs in a so-called Iu section that is a route between the MSC and the RNC. A communication mobile communication system, a radio network control device, a service providing GPRS support node, and a mobile communication method that can be secured can be realized.

It is a block diagram showing the structure of the mobile communication system as one embodiment of this invention. 2 is a sequence chart showing the operation of the mobile communication system of FIG. FIG. 2 is a functional block diagram illustrating a radio network control device in the mobile communication system of FIG. 1. It is a functional block diagram which illustrates the service provision GPRS support node in the mobile communication system of FIG. It is a block diagram showing the structure of the conventional mobile communication system by an Iu Flex system. 6 is a sequence chart showing the operation of the mobile communication system of FIG.

Hereinafter, the present invention will be clarified by describing embodiments of the present invention in detail with reference to the drawings.
(Mobile communication system)
FIG. 1 is a configuration diagram showing a configuration of a mobile communication system as an embodiment of the present invention.
The mobile communication system 10 in FIG. 1 adopts the Iu Flex method. In this mobile communication system 10, when performing location registration from a mobile terminal device to the CS domain, the so-called combine location registration (SG) in which the SGSN of the PS domain receives and the SGSN performs location registration processing for the CS domain is performed. Update).

The location registration area 110 is defined by a plurality of RAN (Radio Access Network) nodes 111, 112, 113, and 114 that cover the location registration area 110. These RAN nodes 111, 112, 113, and 114 are, for example, NodeBs that connect the mobile terminal device and the core network.
Of these RAN nodes 111, 112, 113, and 114, RAN nodes 111 and 112 are under the control of one RNC 121, and RAN nodes 113 and 114 are under the control of another RNC 122. .
SGSN (# 1) 131 and SGSN (# 2) 132 corresponding to these RNCs 121 and 122 are provided.

Since the mobile communication system of FIG. 1 adopts the Iu Flex scheme, each of the RNCs 121 and 122 can be selectively connected to any SGSN of SGSN (# 1) 131 and SGSN (# 2) 132. .
Further, in the state illustrated in FIG. 1, among the SGSN (# 1) 131 and SGSN (# 2) 132, the SGSN (# 2) 132 (the VLR incidental thereto) has a profile (in the figure, “ PF ”).
The SGSN (# 1) 131 and SGSN (# 2) 132 described above can be selectively connected to any of the MSC (# 1) 141 and the MSC (# 2) 142 provided in correspondence thereto. is there.

In the state illustrated in FIG. 1, the profile PF related to the mobile terminal apparatus is already held in the MSC (# 2) 142 (VLR attached thereto).
In FIG. 1, the mobile terminal device receives any one of the RAN nodes 111, 112, 113, and 114 in the location registration area 110 (here, RAN A location registration request is transmitted to the RNC 122 through the node 114). In this example, the RNC 122 that has received the location registration request transmits the location registration request to the SGSN (# 2) 132 in which the profile PF is already held.

The SGSN (# 2) 132 further transmits a location registration request to the MSC (# 2) 142 in which the profile PF is already held among the MSC (# 1) 141 and the MSC (# 2) 142 as necessary. To do. In this case, signal transmission to the MSC by the SGSN is not performed for the location registration periodically performed in a state where the mobile terminal does not move or the like.
However, in the situation described with reference to FIG. 1, it is assumed that a failure has occurred in a so-called Iu section that is a path between the RNC 122 and the MSC (# 2) 142. As described above, the failure in the Iu section is a state in which normal communication is disabled due to a malfunction in hardware related to the switch, router, or port corresponding to this section.

Therefore, the conventional mobile communication system described with reference to FIGS. 5 and 6 cannot perform location registration using the normal MSC (# 1) 141, and therefore cannot perform communication in the CS domain. It will fall into a state.
In contrast, in the embodiment of the present invention in FIG. 1, the RNC 122 sends a health check signal on the C plane (control plane) indicating that a failure has occurred in communication between the own node and the MSC (# 2) 142. SGSN (# 2) 132 is supplied in advance (arrow line A12).

  The SGSN (# 2) 132 relies on the health check signal to transmit a location registration request to the MSC (# 1) 141 not related to the failure. The MSC (# 1) 141 executes a location registration process in response to the location registration request described above. As described above, the location registration process is performed on the route (arrow line A11) of the RAN node 114 → SGSN (# 2) 132 → MSC (# 1) 141, and Iu between the RNC 122 and the MSC (# 2) 142 Even when a failure occurs in a section, communication in the CS domain can be performed.

Next, the operation of the mobile communication system of FIG. 1 will be described in more detail with reference to FIG.
FIG. 2 is a sequence chart showing the operation of the mobile communication system of FIG.
In this embodiment, a health check signal on the C plane indicates that a failure has occurred in the path between the RNC 122 and the MSC (# 2) 142 from the RNC 122 to the SGSN (# 2) 132. A certain “Health Check” is transmitted in advance (step S201).

  When a signal for performing an initial setting “Initial Direct Transfer” is sent from the mobile terminal apparatus to the RNC 122 at the time after the above step S201 (step S202), the RNC 122 that receives this signal sends an “Initial UE Message” signal, That is, a signal requesting initial setting between the RNC and the MSC / SGSN is supplied to the SGSN (# 2) 132 which is a service providing GPRS support node (step S203).

Next, a signal for requesting location registration update “Routing Area Update Request” is transmitted from the mobile terminal apparatus to SGSN (# 2) 132 (step S204).
The SGSN (# 2) 132 indicates that the MSC selected from the held profile PF is the MSC (# 2) 142 related to the Iu section where the failure has occurred by the health check signal received in step S201. The initial setting request between the RNC and the MSC (# 2) 142 in step S203 is rejected (step S205).

Next, the SGSN (# 2) 132 returns a notification to the effect that the initial setting request “Routing Area Update Reject” as a protocol between the mobile terminal device and the SGSN is rejected (step S206).
The mobile terminal apparatus that has received the notification in step S205 executes the Attach procedure. That is, a signal for initial setting “Initial Direct Transfer” is sent again from the mobile terminal device to the RNC 122 (step S207).

Upon receiving “Initial Direct Transfer” in step S206, the RNC 122 receives a signal for initial setting between the RNC and the MSC / SGSN indicated as “Initial UE Message” as an SGSN (# 2) 132 serving as a service providing GPRS support node. (Step S208).
Next, a connection request signal “Attach Request” is issued from the mobile terminal device to the SGSN (# 2) 132 (step S209).

The SGSN (# 2) 132 that has received the “Initial UE Message” in step S208 selects another MSC (# 1) 141 while avoiding the MSC (# 2) 142 related to the failure in the above-mentioned Iu section (step 1). S210), a combine location registration request signal “Combined Location Update Request” is sent to the MSC (# 1) 141 (step S211).
By the processing in step S209, location registration is executed in the MSC (# 1) 141, and communication in the CS domain becomes possible.

FIG. 3 is a functional block diagram illustrating a radio network controller (RNC) in the mobile communication system of FIG.
The RNC in FIG. 3 is a functional block diagram showing the configuration of the RNCs 121 and 122 in FIG. 1, but in FIG.
In FIG. 3, the RNC 300 includes an SGSN (# 1) interface unit 301 and an SGSN (# 2) interface unit 302, MSC (# 1) and (# 2) for connection with SGSN (# 1) and (# 2), respectively. MSC (# 1) interface unit 303 and MSC (# 2) interface unit 304, UE interface unit 305 that is an interface unit with a mobile terminal device, and storage unit 306 are connected to each other through a bus 307. It is connected to the controller 308 and managed by this system controller 308.

The system controller 308 performs various predetermined functions as the RNC by controlling related devices by its own memory, calculation, and control functions.
The storage unit 306 is provided with a health check information holding unit 309, and this health check information holding unit 309 is connected to the own device (RNC 300) by the MSC (# 1) interface unit 303 and the MSC (# 2) interface unit 304. Health check information including items related to health check with the MSC.

Further, a health check information notification unit 310 is configured by a corresponding functional unit of the system controller 308, the SGSN (# 1) interface unit 301, and the SGSN (# 2) interface unit 302.
The health check information notifying unit 310 holds the health check information holding unit 309 for the MSC (# 1) and MSC (# 2) prior to transmitting the location registration request to any service providing GPRS support node. The corresponding health check information is notified to the corresponding SGSN (131, 132).

FIG. 4 is a functional block diagram illustrating a service providing GPRS support node (SGSN) in the mobile communication system of FIG.
The SGSN in FIG. 4 is a functional block diagram showing the configuration of the SGSNs 131 and 132 in FIG. 1, but in FIG. 4, the code 400 is newly assigned to the SGSN.
In FIG. 4, the SGSN 400 includes an RNC (# 1) interface unit 401 and an RNC (# 2) interface unit 402, MSC (# 1) and (# 2) for connecting to the RNC (# 1) and (# 2), respectively. ) And MSC (# 1) interface unit 403 and MSC (# 2) interface unit 404, and GGSN which is an interface unit with GGSN (# 1) and (# 2) not shown in FIG. (# 1) The interface unit 405, the GGSN (# 2) interface unit 406, and the storage unit 407 are connected to the system controller 409 through the bus 408 and managed by the system controller 409.

The system controller 409 performs various predetermined functions as an SGSN by controlling related devices through its own storage, calculation, and control functions.
Further, a health check information receiving unit 410 (illustrated by an alternate long and short dash line) is configured by the corresponding functional units of the system controller 409, the RNC (# 1) interface unit 401, and the RNC (# 2) interface unit 402. The health check information receiving unit 410 receives notification of health check information including items related to the health check between the corresponding RNC (121, 122) and the MSC (141, 142) connected to the RNC.

Further, the corresponding functional unit of the system controller 409, the MSC (# 1) interface unit 403, and the MSC (# 2) interface unit 404
A location registration request transmission destination selection unit 411 is configured. The location registration request transmission destination selection unit 411 selects the MSC (141, 142) that is the transmission destination of the location registration request based on the health check information received by the health check information reception unit 410. Then, the location registration request is sent from the MSC (# 1) interface unit 403 and the MSC (# 2) interface unit 404 toward the selected MSC (141, 142).

The storage unit 407 is provided with a health check information holding unit 412 that holds the health check information received by the health check information receiving unit 410 for a required period under the management of the system controller 409.
The storage unit 407 is provided with a PF information holding unit 413 that holds profile information PF. Here, the profile information PF is held for a required period under the control of the system controller 409.

10 ………………………………………… Mobile communication system 110 ………………………………………… Location registration areas 111, 112, 113, 114 ……… RAN Nodes 121 and 122 ... RNC
131, 132 ... SGSN
141, 142 …………………………… MSC
300 ……………………………………… RNC
309 ……………………………………… Health Check Information Holding Unit 310 ………………………………………… Health Check Information Notification Unit 400 ………………… …………………… SGSN
410 ……………………………………… Health Check Information Receiving Unit 411 ………………………………………… Location Registration Request Transmission Destination Selection Unit

Claims (4)

Each of a plurality of radio network controllers (RNCs) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively connected. When the Iu Flex method is adopted and location registration is performed from the mobile terminal device to the mobile service switching center in the CS domain, the service provision GPRS support node in the PS domain receives the location registration request, and the service provision GPRS A mobile communication system that performs combine location registration in which a support node executes location registration processing for a CS domain,
Prior to transmitting a location registration request to any one of the service providing GPRS support nodes, the radio network control device applies health check information corresponding to the mobile service switching center connected to the own device. Notify the service providing GPRS support node,
The corresponding service providing GPRS support node selects a mobile service exchange center as a transmission destination of the location registration request based on the notified health check information. Each of a plurality of radio network controllers (RNCs) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively connected. When the Iu Flex method is adopted and location registration is performed from the mobile terminal device to the mobile service switching center in the CS domain, the service provision GPRS support node in the PS domain receives the location registration request, and the service provision GPRS The radio network control apparatus applied to a mobile communication system that performs combine location registration in which a support node performs location registration processing for a CS domain,
A health check information holding unit for holding health check information including items relating to health check between the mobile device and the mobile service exchange center connected to the own device;
Prior to transmitting a location registration request to any one of the service providing GPRS support nodes, health check information for notifying the corresponding service providing GPRS support node of the corresponding health check information held in the health check information holding unit A notification unit;
A wireless network control device comprising: Each of a plurality of radio network controllers (RNCs) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively connected. When the Iu Flex method is adopted and location registration is performed from the mobile terminal device to the mobile service switching center in the CS domain, the service provision GPRS support node in the PS domain receives the location registration request, and the service provision GPRS The service providing GPRS support node applied to a mobile communication system that performs combine location registration in which a support node performs location registration processing for a CS domain,
A health check information receiving unit that receives notification of health check information including items related to health check between the wireless network control device and the mobile service switching center connected to the wireless network control device;
A location registration request transmission destination selection unit that selects the mobile service exchange center as a transmission destination of the location registration request based on the health check information received by the health check information reception unit;
A service providing GPRS support node, comprising: Each of a plurality of radio network controllers (RNCs) and a plurality of service providing GPRS support nodes (SGSN), gateway GPRS support nodes (GGSN), or mobile service switching centers (MSCs) are selectively connected. When the Iu Flex method is adopted and location registration is performed from the mobile terminal device to the mobile service switching center in the CS domain, the service provision GPRS support node in the PS domain receives the location registration request, and the service provision GPRS A mobile communication method in a mobile communication system for performing combine location registration in which a support node performs location registration processing on a CS domain,
Prior to the wireless network control device transmitting a location registration request to any one of the service providing GPRS support nodes, the health check information corresponding to the mobile service switching center connected to the own device is applicable. A health check information notifying step for notifying the service providing GPRS support node;
Location registration request transmission destination selection step in which the corresponding service providing GPRS support node selects a mobile service switching center as a transmission destination of the location registration request based on the health check information notified in the health check information notification step When,
A mobile communication method comprising:

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