JP2009077418A - Mobile communication system, mobile communication method, mobile station, and exchange - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid congestion, without affecting processing not to be regulated originally, by regulating only processing that is a congestion factor. <P>SOLUTION: In a mobile communication system, an exchange MSC/SGSN includes a congestion factor detecting section 11 for detecting a congestion occurrence factor in the exchange MSC/SGSN, and a regulation instruction transmitting section 12 for transmitting, to a radio channel control station RNC, a regulation instruction by processing instructing the class of processing to be regulated in the exchange MSC/SGSN, based on the detected congestion occurrence factor, wherein the radio channel control station RNC includes a notification information transmitting section 22 for transmitting, to a mobile station UE, notification information containing a received regulation instruction by processing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mobile communication system, a mobile communication method, a mobile station, and an exchange.

  In a conventional mobile communication system, for example, when a train crosses a location registration area, the mobile stations of all users on the train start transmission of location registration requests all at once. In addition, there is a problem that the processing load on the exchange is greatly pressed.

  In addition, when a large amount of transmission processing is performed due to a specific event (for example, an application for TV planning), transmission of a transmission request for performing such transmission processing greatly compresses the wireless capacity and the processing load on the exchange. There was also a problem.

  In order to solve such problems, the current 3GPP standard specification defines “Domain Specific Access Control (hereinafter referred to as DSAC)”. The DSAC is configured to regulate the processing in the circuit switch and the processing in the packet switch separately when congestion occurs in the network.

  When the DSAC is not applied and the congestion occurs in the circuit switching network or the packet switching network, all processes in the circuit switching device and the packet switching device are regulated (prohibited). Therefore, the mobile station cannot perform outgoing / incoming call processing or location registration processing through either a circuit switch or a packet switch.

  In addition, when congestion occurs in a circuit switched network or a packet switched network when DSAC is applied, in a domain in which congestion occurs, that is, in a switch (circuit switch or packet switch) in the network in which congestion occurs. All processes are prohibited. Therefore, the mobile station cannot perform outgoing / incoming call processing or location registration processing via a switch (circuit switch or packet switch) in a network in which congestion has occurred.

  With reference to FIG. 14 to FIG. 16, an operation for restricting processing in each exchange in a mobile communication system to which a conventional DSAC is applied will be described.

  As shown in FIGS. 14 to 16, in step S1000, the circuit switch MSC or the packet switch detects the occurrence of congestion in the circuit switched network or the packet switched network.

  In step S1001, the switch (line switch MSC or packet switch SGSN) that has detected the congestion instructs the radio network controller RNC to regulate all processing in the circuit switch MSC or packet switch SGSN. “CS restriction instruction” or “PS restriction instruction” is transmitted.

  In step S1002, the radio network controller RNC generates broadcast information including the received CS regulation instruction or PS regulation instruction. In step S1003, the radio network controller RNC transmits the broadcast information to the subordinate location registration area via the radio base station BTS. Such broadcast information is transmitted.

As a result, the mobile station cannot perform the outgoing / incoming call processing or the location registration processing via the switch (circuit switch or packet switch) in the network in which congestion has occurred.
3GPP TS.24.008 V6.1.2.0 (6.c.0), issued in March 2006 3GPP TS.25.331 V6.5.0, issued in March 2005

  In general, the main congestion factors in the network are specific processes such as location registration processing and outgoing call processing. Therefore, it is sufficient to restrict some of these processes and restrict all processes in the exchange. There is often no need to apply.

  Nevertheless, in the mobile communication system to which the conventional DSAC as described above is applied, all processing in the circuit switch or packet switch is performed on all mobile stations located in a specific location registration area. Because it is configured to be restricted, it can be used for incoming calls to mobile stations that are not supposed to be restricted due to unnecessary restrictions, or for location registrations by mobile stations that have newly moved to the specific location registration area. There was a problem of being affected.

  Therefore, the present invention has been made in view of the above-described problems, and by restricting only the processing of the congestion factor, it is possible to avoid congestion without affecting the processing that should not be restricted originally. An object of the present invention is to provide a mobile communication system, a mobile communication method, a mobile station, and an exchange.

  A first feature of the present invention is a mobile communication system including a radio network controller and an exchange, wherein the exchange is configured to detect a congestion occurrence factor in the exchange; A restriction instruction transmission unit configured to transmit a restriction instruction for each process instructing a processing type to be restricted in the exchange to the radio network controller based on the detected congestion occurrence factor; And the radio network controller includes a broadcast information transmitting unit configured to transmit the received broadcast information including the received process-specific restriction instruction to the mobile station.

  In the first aspect of the present invention, the switch may be either a circuit switch or a packet switch.

  In the first feature of the present invention, the processing type may include at least one of a location registration process or a transmission process.

  A second feature of the present invention is a mobile communication method for performing mobile communication via a radio network controller and a switch, wherein the switch detects a congestion occurrence factor in the switch, and the switch includes the switch A step of transmitting, to the radio network controller, a process-specific regulation instruction for instructing a processing type to be regulated in the exchange based on the detected congestion occurrence factor; and the radio network controller receives the received Transmitting broadcast information including a process-specific restriction instruction to a mobile station, and the mobile station suppressing a process corresponding to the process-specific restriction instruction included in the received broadcast information. The gist.

  A third feature of the present invention is a mobile station that performs mobile communication via a radio network controller and an exchange, and is configured to receive broadcast information transmitted from the radio network controller. An information receiving unit; an analysis unit configured to analyze a specific process in a specific exchange to be regulated based on a process-specific regulation instruction included in the received broadcast information; and the analyzed And a processing unit configured to suppress a specific process in a specific switch.

  A fourth feature of the present invention is an exchange used in a mobile communication system, which is based on a congestion factor detection unit configured to detect a congestion occurrence factor in the exchange and the detected congestion occurrence factor. And a restriction instruction transmission unit configured to transmit a restriction instruction for each process instructing a processing type to be restricted in the exchange to a radio network controller in the mobile communication system. The gist.

  As described above, according to the present invention, by restricting only the processing of the congestion factor, it is possible to avoid congestion without affecting the processing that should not be regulated, A communication method, a mobile station, and an exchange can be provided.

(Configuration of mobile communication system according to the first embodiment of the present invention)
The configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIG. 1 to FIG.

  As shown in FIG. 5, the mobile communication system according to the present embodiment includes an exchange (circuit exchange MSC or packet exchange SGSN), a radio network controller RNC, a plurality of base stations BS # A and BS # B, Mobile stations UE # 1 and UE # 2.

  The circuit switch MSC is a device that manages a circuit switching service, and is configured to perform location registration processing for the circuit switched network of the mobile station UE and communication control in the circuit switched network.

  The packet switch SGSN is a device that manages the packet switching service, and is configured to perform location registration processing of the mobile station UE with respect to the packet switched network and communication control in the packet switched network.

  As shown in FIG. 1, the exchange MSC or SGSN includes a congestion factor detection unit 11 and a restriction instruction transmission unit 12.

  The congestion factor detection unit 11 is configured to detect a congestion occurrence factor in the exchange MSC or SGSN.

  Specifically, the congestion factor detection unit 11 is configured to detect which process causes congestion in the exchange MSC or SGSN.

  For example, the congestion factor detection unit 11 may be configured to detect the occurrence of congestion based on the CPU usage rate. For example, when the congestion factor detection unit 11 detects a process having a CPU usage rate higher than a predetermined threshold (for example, a location registration process or a transmission process), the congestion factor detection unit 11 determines that congestion has occurred due to the process.

  The congestion factor detection unit 11 may be configured to detect that congestion has occurred due to one congestion factor, or may be configured to detect that congestion has occurred due to a plurality of congestion factors. May be.

  Based on the congestion occurrence factor detected by the congestion factor detection unit 11, the restriction instruction transmission unit 12 performs a processing type (for example, location registration processing or transmission) to be restricted in the exchange MSC or SGSN to the radio network controller RNC. It is configured to transmit a process-specific regulation instruction instructing (process).

  For example, when the regulation instruction transmission unit 12 detects a process with a CPU usage rate higher than a predetermined threshold (for example, a location registration process or a transmission process), a process on the mobile station UE side corresponding to the process (for example, a position) A processing-specific restriction instruction (for example, a position registration restriction instruction or a transmission restriction instruction) that instructs to restrict the registration process or the transmission process) may be transmitted.

  The restriction instruction transmitting unit 12 may be configured to transmit a process-specific restriction instruction for restricting one process, or to transmit a process-specific restriction instruction for restricting a plurality of processes. It may be configured.

  The radio network controller RNC is a device that manages radio communication control processing with the mobile station UE.

  Also, the radio network controller RNC exchanges predetermined information with the mobile station UE via the radio channel, and notifies the exchange MSC / SGSN of the predetermined information exchanged with the mobile station UE. It is configured.

  As illustrated in FIG. 2, the radio network controller RNC includes a process-specific regulation instruction receiving unit 21 and a broadcast information transmitting unit 22.

  The process restriction instruction receiving unit 21 is configured to receive the process restriction instruction transmitted from the exchange MSC / SGSN.

  The broadcast information transmitting unit 22 is configured to generate broadcast information including the process-specific restriction instruction received by the process-specific restriction instruction receiving unit 21 and transmit it to the mobile station UE.

  Here, the broadcast information transmitting unit 22 is configured to independently generate and transmit broadcast information for a circuit switched network and broadcast information for a packet switched network.

  The notification information transmission unit 22 may generate and transmit notification information for restricting one process, or may generate and transmit notification information for restricting a plurality of processes.

  FIG. 3 shows an example of the notification information generated by the notification information transmission unit 22.

  As shown in FIG. 3 (a), broadcast information used in a conventional mobile communication system is set to “SIB3 (System Information Block 3)” defined by 3GPP. It is configured to include regulatory instructions.

  On the other hand, in the mobile communication system according to the present embodiment, the broadcast information transmitting unit 22 instructs the “SIB3” to be regulated by processing (see FIG. 3B to FIG. 3D). (Location registration restriction instruction, transmission restriction instruction, etc.) are added and broadcast to a plurality of mobile stations UE.

  Specifically, as shown in FIG. 3B, the broadcast information transmitting unit 22 is information indicating a restriction instruction for each process such as a position registration restriction instruction, a transmission restriction instruction, and an incoming call restriction instruction with respect to “SIB3”. An element may be added and “CS restriction presence / absence (true or false)” and “PS restriction presence / absence (true or false)” may be defined for each information element.

  For example, when the CS restriction is “true”, the position registration restriction instruction is “true”, and the other restriction instruction for each process is “false”, the mobile station UE “registers the position in the circuit exchange MSC”. It can be determined that only processing is restricted.

  Further, as shown in FIG. 3C, the broadcast information transmitting unit 22 includes information indicating a process-specific restriction instruction in an information element indicating a CS restriction instruction and an information element indicating a PS restriction instruction in “SIB3”, respectively. An element is added, and it is configured to define “location registration restriction presence / absence”, “transmission restriction presence / absence”, “incoming call restriction presence / absence”, etc., in the added information elements indicating the restriction instructions for each process. It may be.

  For example, when the location registration process in the circuit switch MSC and the outgoing call process in the packet switch SGSN are restricted, “Access class” in the information element indicating the CS restriction instruction becomes “true”, and the information indicating the CS restriction instruction Of the information elements indicating the process-specific restriction instructions in the element, only “location registration restriction instruction” is “true”, and “Access class” in the information element indicating the PS restriction instruction is “true”, indicating the PS restriction instruction. Of the information elements indicating the processing-specific restriction instructions in the information element, only the “transmission restriction instruction” is “true”.

  Further, as shown in FIG. 3 (d), the notification information transmitting unit 22 is information indicating a process-specific restriction instruction separately from the information element indicating the CS restriction instruction and the information element indicating the PS restriction instruction in “SIB3”. An element is added, and it is configured to define “location registration restriction presence / absence”, “transmission restriction presence / absence”, “incoming call restriction presence / absence”, etc., in the added information element indicating the restriction instruction for each process. Also good.

  According to the example shown in FIG. 3D, the notification information transmitting unit 22 performs “location registration restriction presence” or “transmission restriction presence” regardless of “CS restriction presence” or “PS restriction presence / absence”. And “presence / absence of incoming calls” can be defined.

  For example, even when both the CS restriction and the PS restriction are “false”, the mobile station UE is restricted with respect to the process that is “true” in the information element indicating the process-specific restriction instruction. .

  Note that the notification information transmission unit 22 may be configured to generate and transmit notification information including a processing-specific regulation instruction by itself when congestion occurs in the wireless capacity itself.

  As shown in FIG. 4, the mobile station UE includes a broadcast information receiving unit 31, an analyzing unit 32, a location registration processing unit 33, a transmission processing unit 34, and an incoming call processing unit 35.

  The broadcast information receiving unit 31 is configured to receive broadcast information transmitted from the radio network controller RNC.

  The analysis unit 32 analyzes a specific process in a specific switch (circuit switch MSC or packet switch SGSN) to be controlled based on a process-specific restriction instruction included in the broadcast information received by the broadcast information reception unit 31. (See FIG. 3).

  The location registration processing unit 33, the transmission processing unit 34, and the incoming call processing unit 35 are configured to suppress specific processing in a specific exchange (circuit exchange MSC or packet exchange SGSN) analyzed by the analysis unit 32. .

  Specifically, the location registration processing unit 33 is configured to perform location registration processing by transmitting a CS location registration request or a PS location registration request to the circuit switch MSC or the packet switch SGSN.

  Further, the location registration processing unit 33 is configured to suppress the location registration processing in the specific exchange (circuit switch MSC or packet switch SGSN) analyzed by the analysis unit 32.

  Specifically, the call processing unit 34 is configured to perform call processing by transmitting a CS call request or a PS call request to the circuit switch MSC or the packet switch SGSN.

  In addition, the transmission processing unit 34 is configured to suppress transmission processing in a specific exchange (circuit switch MSC or packet switch SGSN) analyzed by the analysis unit 32.

  Specifically, the incoming call processing unit 35 is configured to perform incoming call processing by receiving a CS incoming call notification or a PS incoming call notification from the circuit switch MSC or the packet switch SGSN.

  The incoming call processing unit 35 is configured to suppress incoming call processing in a specific exchange (circuit switch MSC or packet exchange SGSN) analyzed by the analysis unit 32.

(Operation of the mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 4 thru | or FIG. 13, operation | movement of the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated. In the examples of FIGS. 4 to 13, the base station BS only performs information transfer, and thus description thereof is omitted.

  First, with reference to FIG. 5 to FIG. 7, an operation when CS location registration restriction or PS location registration restriction is performed in the mobile communication system according to the present embodiment will be described.

  When the train moves from the location registration area A to the location registration area B in step S100, the user's mobile station UE # 1 in the train in the location registration area B simultaneously sends a location registration request ( CS location registration request, PS location registration request, or CS / PS location registration request).

  In step S102, in the exchange (circuit exchange MSC or packet exchange SGSN), a large amount of location registration requests arrive and congestion occurs.

  In step S103, the exchange MSC or SGSN transmits a position registration restriction instruction (CS position registration restriction instruction or PS position registration restriction instruction) for restricting position registration processing in the exchange to the radio network controller RNC. .

  The radio network controller RNC generates broadcast information including the received location registration restriction instruction in step S104, and transmits the generated broadcast information to the location registration area B by broadcast in step S105.

  In step S106, the above-described mobile station UE # 1 receives and analyzes the broadcast information, thereby recognizing that the location registration process is regulated in the location registration area B, and the location registration area B The location registration process at is suppressed.

  Even in such a case, since the mobile station UE # 2 already located in the location registration area B has already performed the location registration processing, it can perform the outgoing / incoming processing.

  In particular, at the boundary of the location registration area such as along a track, the radio network controller RNC always transmits notification information including a location registration restriction instruction (the restriction rate is changed by operation). By preventing the location registration process from being performed all at once, it is possible to prevent the congestion as described above.

  2ndly, with reference to FIG. 8 thru | or FIG. 10, operation | movement in case the CS transmission control or PS transmission control is performed in the mobile communication system which concerns on this embodiment is demonstrated.

  In step S201, the mobile station UE simultaneously sends a call request (CS call request (for example, a voice call call request or a Deli phone call request) or PS call request (for example, i-mode (registered trademark) connection) in a specific event Request or email transmission request)).

  In step S202, a large amount of outgoing requests arrive and congestion occurs in the switch (circuit switch MSC or packet switch SGSN).

  In step S203, the exchange MSC or SGSN transmits a transmission restriction instruction (CS transmission restriction instruction or PS transmission restriction instruction) for restricting transmission processing in the exchange to the radio network controller RNC.

  In step S204, the radio network controller RNC generates broadcast information including the received call restriction instruction, and in step S205, the generated broadcast information is broadcast to a specific area.

  In step S206, the mobile station UE recognizes that the calling process is regulated in the specific area by receiving and analyzing the broadcast information, and suppresses the calling process in the specific area.

  3rdly, with reference to FIG. 11, operation | movement in case the CS transmission control and CS location registration control are performed in the mobile communication system which concerns on this embodiment is demonstrated.

  A plurality of mobile stations UE transmit a CS transmission request in step S301, and transmit a CS location registration request in step S302.

  In step S303, a large amount of CS transmission requests and CS location registration requests arrive at the circuit exchange MSC and congestion occurs.

  In step S304, the circuit switch MSC transmits a CS transmission restriction instruction and a CS position registration restriction instruction for restricting the CS transmission processing and the CS location registration signal processing in the circuit switching unit MSC to the radio network controller RNC. .

  In step S305, the radio network controller RNC generates broadcast information including the received CS transmission restriction instruction and CS location registration restriction instruction, and in step S306, the generated broadcast information is broadcast to a specific area. To do.

  In step S307, the mobile station UE recognizes that the CS transmission process and the CS location registration signal process are regulated in the specific area by receiving and analyzing the broadcast information. CS transmission processing and CS location registration processing are suppressed.

  4thly, with reference to FIG. 12, the operation | movement in case CS transmission control and PS location registration control are performed in the mobile communication system which concerns on this embodiment is demonstrated.

  In step S401, the plurality of mobile stations UE transmit a CS transmission request, and in step S402, transmit a PS location registration request.

  In step S403, a large number of CS transmission requests arrive at the circuit exchange MSC and congestion occurs.

  In step S404, the circuit switch MSC transmits a CS transmission restriction instruction for restricting CS transmission processing in the circuit switch MSC to the radio network controller RNC.

  In step S405, a large amount of PS location registration requests arrive at the packet switch SGSN, causing congestion.

  In step S406, the packet exchange SGSN transmits a PS location registration restriction instruction for restricting the PS location registration process in the packet exchange SGSN to the radio network controller RNC.

  In step S407, the radio network controller RNC generates broadcast information including the received CS transmission restriction instruction and PS location registration restriction instruction, and in step S408, the generated broadcast information is transmitted by broadcast to a specific area. To do.

  In step S409, the mobile station UE recognizes that the CS transmission process and the PS location registration signal process are regulated in the specific area by receiving and analyzing the broadcast information, and the specific area. The CS transmission process and the PS location registration signal process are suppressed.

  Fifth, with reference to FIG. 13, an operation when the CS location registration restriction is canceled in the mobile communication system according to the present embodiment will be described.

  In step S501, the radio network controller RNC generates broadcast information including a CS location registration restriction instruction, and transmits it as “SYSTEM INFORMATION” using broadcast.

  In step S502, the mobile station UE that has moved to the specific area receives and analyzes the broadcast information, thereby recognizing that the CS location registration process is regulated in the specific area. The CS location registration process is suppressed.

  In step S503, the mobile station UE transmits a PS location registration request to the packet switch SGSN in the specific area using “Routing Area Update Request (update type: RA updating)”.

  In step 504, the mobile station UE receives “Routing Area Update Accept (updated update: RA updated)” notifying that the PS location registration process in the specific area has been completed from the packet switch SGSN.

  In step S505, the circuit switch MSC transmits to the radio network controller RNC a CS location registration restriction release instruction for instructing release of restriction on CS location registration processing in the specific area.

  In step S506, the radio network controller RNC generates broadcast information including the received CS location registration restriction release instruction, transmits “Paging Type 1 (bcch modify)” in step S507, and then generates it in step S508. The broadcast information is transmitted by broadcast to the specific area as “SYSTEM INFORMATION”.

  In step S509, the mobile station UE recognizes that the restriction on the location registration process has been released in the specific area by receiving and analyzing the broadcast information.

  In step S510, the mobile station UE transmits a CS location registration request to the packet switch SGSN in the specific area using “Routing Area Update Request (update type: combined RA / LA updating with IMSI attach)”. .

  In step S511, the packet exchange SGSN performs the CS location registration process of the mobile station UE with respect to the circuit exchange MSC according to the received “Routing Area Update Request (update type: combined RA / LA updating with IMSI attach)”. Do.

  In step S512, the packet switch SGSN transmits "Routing Area Update Accept (updated RA: combined RA / LA updated)" notifying the mobile station UE that the CS location registration process in the specific area is completed. To do.

(Operations and effects of the mobile communication system according to the first embodiment of the present invention)
According to the mobile communication system according to the first embodiment of the present invention, the restriction instruction transmission unit 12 of the exchange MSC or SGSN is originally restricted by specifying and restricting processing that is a congestion factor in each exchange. It is possible to avoid adverse effects on processing that should not be performed.

  Further, according to the mobile communication system according to the first embodiment of the present invention, the regulation instruction transmission unit 12 of the exchange MSC or SGSN is always regulated by processing at a specific location (such as a position registration area boundary on a track). By transmitting the instruction, it is possible to avoid a congestion state by restricting the specific process (location registration process) in advance at the specific place.

It is a functional block diagram of the exchange which concerns on the 1st Embodiment of this invention. 2 is a functional block diagram of a radio network controller according to the first embodiment of the present invention. FIG. It is a figure which shows an example of the regulation information received in the radio network controller which concerns on the 1st Embodiment of this invention. FIG. 3 is a functional block diagram of a mobile station according to the first embodiment of the present invention. It is a figure for demonstrating operation | movement in case the CS location registration regulation is performed in the mobile communication system which concerns on the 1st Embodiment of this invention. FIG. 5 is a sequence diagram showing an operation when CS location registration restriction is performed in the mobile communication system according to the first embodiment of the present invention. It is a figure for demonstrating operation | movement in case the PS location registration regulation is performed in the mobile communication system which concerns on the 1st Embodiment of this invention. FIG. 5 is a sequence diagram showing an operation when PS location registration restriction is performed in the mobile communication system according to the first embodiment of the present invention. It is a figure for demonstrating operation | movement when CS transmission control is performed in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement when CS transmission control is performed in the mobile communication system which concerns on the 1st Embodiment of this invention. FIG. 5 is a sequence diagram showing an operation when CS transmission restriction and CS location registration restriction are performed in the mobile communication system according to the first embodiment of the present invention. FIG. 4 is a sequence diagram showing operations when CS transmission restriction and PS location registration restriction are performed in the mobile communication system according to the first embodiment of the present invention. FIG. 5 is a sequence diagram showing an operation when CS location registration restriction is canceled in the mobile communication system according to the first embodiment of the present invention. It is a figure for demonstrating operation | movement in case the CS regulation or PS regulation is performed in the conventional mobile communication system. It is a sequence diagram which shows operation | movement when CS regulation is performed in the conventional mobile communication system. It is a sequence diagram which shows operation | movement when PS regulation is performed in the conventional mobile communication system.

Explanation of symbols

MSC, SGSN ... switch 11 ... congestion factor detection unit 12 ... regulation instruction transmission unit RNC ... radio network control station 21 ... processing-specific regulation instruction reception unit 22 ... broadcast information transmission unit UE ... mobile station 31 ... broadcast information reception unit 32 ... analysis Unit 33 ... Location registration processing unit 34 ... Transmission processing unit 35 ... Incoming call processing unit

Claims (6)

A mobile communication system comprising a radio network controller and an exchange,
The exchange is
A congestion factor detector configured to detect a congestion occurrence factor in the exchange;
Based on the detected congestion occurrence factor, a restriction instruction transmitting unit configured to transmit a process-specific restriction instruction for instructing a processing type to be restricted in the exchange to the radio network controller. Equipped,
The radio network controller is
A mobile communication system comprising: a broadcast information transmission unit configured to transmit broadcast information including the received processing-specific restriction instruction to a mobile station.   The mobile communication system according to claim 1, wherein the switch is either a circuit switch or a packet switch.   3. The mobile communication system according to claim 1, wherein the processing type includes at least one of a location registration process and a transmission process. A mobile communication method for performing mobile communication via a radio network controller and an exchange,
The exchange detects a congestion occurrence factor in the exchange; and
A step of transmitting, to the radio network controller, a process-specific regulation instruction that indicates a process type to be regulated in the switch based on the detected congestion occurrence factor;
The radio network controller transmits broadcast information including the received processing-specific regulation instruction to the mobile station;
And a step of suppressing the process corresponding to the process-specific restriction instruction included in the received broadcast information. A mobile station that performs mobile communication via a radio network controller and an exchange,
A broadcast information receiving unit configured to receive broadcast information transmitted from the radio network controller;
An analysis unit configured to analyze a specific process in a specific exchange to be controlled based on a process-specific regulation instruction included in the received notification information;
And a processing unit configured to suppress specific processing in the analyzed specific exchange. An exchange used in a mobile communication system,
A congestion factor detector configured to detect a congestion occurrence factor in the exchange;
A restriction configured to transmit a process-specific restriction instruction for instructing a processing type to be restricted in the exchange to a radio network controller in the mobile communication system based on the detected congestion occurrence factor. An exchange comprising: an instruction transmission unit.

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