JP2014239469A - Communication method, mobile communication system, pgw (pdn gateway), pgw control method, mobile station, and mobile station control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform originating processing and incoming processing of communication using PCC (Policy and Charging Control) control if a fault occurs at a PCRF (Policy and Charging Rules Function server device) or if the PCRF is resumed after the failure.SOLUTION: If a P-GW (gateway device) detected a predetermined event after detection of a fault at a PCRF, the P-GW includes a step of resetting association of PDN (Packet Data Network) connection set between a mobile station and the P-GW and PCC connection set between a PCRF (Policy and Charging Rules Function) and the P-GW. At the step, the P-GW determines whether it will perform resetting or not according at least one of the state and congestion state of the mobile station.

Description

  The present invention relates to a mobile communication method, a gateway device, a mobility management node, and a call session control server device.

  In 3GPP, specifications of a mobile communication system using the SAE (System Architecture Evolution) method are being studied.

3GPP TS 23.401 3GPP TS 23.203

  However, at present, in the SAE mobile communication system, the operation when a failure occurs in the PCRF (Policy and Charging Rules Function, policy and charging server device) or when the PCRF restarts after such failure is specified. Not.

  Therefore, in the current SAE mobile communication system, when a failure occurs in the PCRF, or when the PCRF is restarted after such failure, even if the failure is recovered, the Policy and Charging Control is used. ) There was a problem that it was not possible to perform outgoing processing and incoming processing of communication related to control.

  For example, as shown in FIG. 8, in the current SAE mobile communication system, the PCRF recovered after a failure has occurred is “Usage reports” or the like from the S / P-GW (Serving / PDN-Gateway, gateway device). Even when the PCC control signal is received, since the corresponding PCC profile is not held, there is a problem that it is not known what to do (Issue 1).

  In addition, as shown in FIG. 8, in the current SAE mobile communication system, after a failure occurs in the PCRF, when such a failure is recovered, there is a state mismatch between the S / P-GW and the PCRF. There was a problem of remaining (Issue 2).

  Furthermore, as shown in FIG. 9, in the current SAE mobile communication system, the PCRF recovered after a failure has occurred from P-CSCF (Proxy-Call Session Control Function) in IMS (IP Multimedia Subsystem), Even when an incoming signal addressed to the UE (“SDP Offer (AAR)”) is received, the corresponding PCC profile is not held, so an error (“AAR: Error”) is issued to the P-CSCF. There was a problem of returning it.

  Further, in the current SAE mobile communication system, when a failure occurs in the PCRF, there is a problem that communication related to the PCRF control cannot be performed regardless of the IMS.

  Furthermore, the current SAE mobile communication system has a problem in that it cannot perform dynamic charging control due to a PCRF failure.

  Therefore, the present invention has been made in view of the above-described problems, and when a failure occurs in the PCRF, or when the PCRF resumes after such failure, communication outgoing processing and incoming processing using PCC control are performed. An object of the present invention is to provide a mobile communication method, a gateway device, a mobility management node, and a call session control server device that can be performed.

  The first feature of the present invention uses a first connection set between the mobile station and the gateway device, and a second connection set between the policy and billing server device and the gateway device. In the mobile communication method for performing communication, when the gateway device detects a predetermined event after detecting a failure of the policy and the accounting server device, the association of the first connection and the second connection is reestablished. The gist is to include the process A for setting.

  According to a second aspect of the present invention, a first connection set between the mobile station and the gateway device, a second connection set between the policy and charging server device and the gateway device, A mobile communication method for performing communication using a third connection set between a policy and charging server device and a call session control server device, wherein the call session control server device includes the policy and charging server device The present invention includes the step A of resetting the association between the first connection, the second connection, and the third connection when a predetermined event is detected after detecting the failure.

  The third feature of the present invention uses a first connection established between the mobile station and the gateway device, and a second connection established between the policy and billing server device and the gateway device. A gateway device used in a mobile communication method for performing communication, and when a predetermined event is detected after detecting a failure of the policy and charging server device, reassociation of the first connection and the second connection is performed. The gist is that it is configured to perform setting.

  According to a fourth aspect of the present invention, a first connection set between the mobile station and the gateway device and a second connection set between the policy and charging server device and the gateway device are used. A mobile management node used in a mobile communication method for performing communication, and receiving a request for releasing the first connection including predetermined information indicating that a failure of the policy and a billing server device has been detected from the gateway device In this case, the gist is that the mobile station is configured to request the mobile station to perform a re-attach process.

  A fifth feature of the present invention uses a first connection set between the mobile station and the gateway device, and a second connection set between the policy and billing server device and the gateway device. A mobile management node used in a mobile communication method for performing communication, and receiving a request for releasing the first connection including predetermined information indicating that a failure of the policy and a billing server device has been detected from the gateway device In this case, without requesting the radio base station to release the connection between the radio base station and the mobile station in the first connection, the gateway device is newly made the second The gist is that it is configured to request to set a connection.

  According to a sixth aspect of the present invention, a first connection set between the mobile station and the gateway device, a second connection set between the policy and charging server device and the gateway device, A call session control server device used in a mobile communication method for performing communication using a third connection set between a policy and billing server device and a call session control server device, wherein the policy and billing server device The gist of the invention is that when a predetermined event is detected after detecting the failure, the association between the first connection, the second connection, and the third connection is reset.

  As described above, according to the present invention, when a failure occurs in the PCRF, or when the PCRF resumes after such failure, the mobile communication capable of performing transmission processing and incoming processing of communication using PCC control. A method, a gateway device, a mobility management node, and a call session control server device can be provided.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. It is a sequence diagram explaining operation | movement of the mobile communication system which concerns on the modification 3 of the 1st Embodiment of this invention. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. It is a figure for demonstrating the problem of the conventional mobile communication system. It is a figure for demonstrating the problem of the conventional mobile communication system.

(First embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 7, the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.

  The mobile communication system according to the present embodiment is an SAE mobile communication system. Specifically, as shown in FIG. 1, an E-UTRAN (Evolved Universal Terrestrial Radio) including an eNB (radio base station). Access Network (Node Network), Node B (Radio Base Station), RNC (Radio Network Controller, Radio Channel Controller), UTRAN (Universal Terrestrial Radio Access Network), MME (Mobile S & M Mobile Node) GPRS Support Node (packet exchange), S / P-GW, HSS (Home Subscriber) erver, the subscriber management server device) or the IMS or, or OCS (Online Charging System), which comprises a OFCS (Offline Charging System) or the like.

  In addition, IMS includes P-CSCF, I / S-CSCF (Interrogation / Serving-Call Session Control Function) (not shown), SCC AS (Service Centralization and Continuity Application Server) (not shown). Yes.

  In the mobile communication system according to this embodiment, the UE is configured to be able to perform communication using PCC control using a PDN (Packet Data Network) connection, PCC connection # 1, and PCC connection # 2. ing.

  Here, the PDN connection is a connection established between the UE and the S / P-GW, and the PCC connection # 1 is a connection established between the PCRF and the S / P-GW. Connection # 2 is a connection set between the PCRF and the P-CSCF.

  When the PCC connection # 1 and the PCC connection # 2 are set, the S / P-GW and the P-CSCF operate as a PCRF client.

  In the mobile communication system according to the present embodiment, the PCC connection # 2 may not be set, or three or more PCC connections may be set.

  Hereinafter, the operation of the mobile communication system according to the present embodiment will be described with reference to FIGS.

  First, an overview of the operation of the mobile communication system according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 2, in step S1000A, a PDN connection is set up between the UE and the S / P-GW, and in step S1000B, the PDN connection is set up between the PCRF and the S / P-GW. Associated with the connected PCC connection # 1. In FIG. 2, the S / P-GW may have the functions of S-GW and P-GW, or may have only the function of P-GW, or the function of S-GW. You may have only.

  In step S1000C, for example, “Application Registration” such as “IMS Registration” is performed for the UE, and in Step S1000D, the PDN connection, the PCC connection # 1, and the PCC connection # 2 are associated.

  After that, the S / P-GW detects the occurrence of the PCRF failure (step S1001) in step S1002A and then detects a predetermined event in step S1002B. In step S1002C, the S / P-GW detects the PDN connection and the PCC connection # 1. Reset the association. In such a case, the PCC connection # 1 may be reset again.

  Similarly, when the P-CSCF detects the occurrence of the PCRF failure (step S1001) in step S1003A and then detects a predetermined event in step S1003B, the PCC connection # 1 and the PCC connection # are detected in step S1003C. Re-set the association with 2. In such a case, the PCC connection # 2 may be reset again.

  In steps S1002A and S1003A, the PCRF client such as S / P-GW or P-CSCF may detect the occurrence of a failure in the PCRF, or detect the resumption of the PCRF (that is, recovery from the above-described failure). May be. Henceforth, it is the same in this embodiment.

  Here, the S / P-GW and the P-CSCF may perform the above-described resetting when a certain time has elapsed after detecting the occurrence of the failure of the PCRF (step S1001).

  The predetermined event includes reception of an incoming signal addressed to the UE (for example, “INVITE”), execution of C-Plane processing (for example, bearer state change processing) for the UE, U-Plane for the UE. Data transmission / reception is assumed.

  Further, when a PCRF client such as S / P-GW or P-CSCF detects a failure in the PCRF in steps S1002A and S1003A, it notifies the OCS or OFCS of the fact, and the OCS or OFCS The charging control may be performed.

  The present invention is not limited to the case where a failure occurs in the PCRF, but can be applied to a case where communication with the PCRF is not possible. The same applies to the following description.

  2ndly, with reference to FIG. 3, the specific example 1 of operation | movement of the mobile communication system which concerns on this embodiment is demonstrated.

  As shown in FIG. 3, the operations in steps S2000A to S2001 are the same as the operations in steps S1000A to S1001 shown in FIG.

  In step 2002A, when the P-GW detects the occurrence of a PCRF failure (step S2001), the P-GW sets a “PCRF failure flag” in UE-related information (for example, an EPS (Evolved Packet System) bearer context).

  The “PCRF failure flag” may be set by the P-GW and may be set by the S-GW.

  Thereafter, the P-CSCF receives “INVITE” addressed to the UE from the communication partner in step S2002B1, and transmits the “INVITE” to the S / P-GW in step S2002B2.

  In step S2002B3, when the P-GW receives “INVITE” addressed to the UE corresponding to the EPS bearer context in which the “PCRF failure flag” is set, the PDN connection, the PCC connection # 1, the PCC connection # 2, It is determined whether to reset the association.

  Here, the P-GW may determine whether or not to perform the above-described reconfiguration according to at least one of the UE state (for example, whether or not communication is being performed) and the congestion status. As the congestion status, a network (core network or radio access network) congestion status, a PCRF congestion status, or the like is assumed.

  Note that the MME may perform the determination in step S2002B3 instead of the S / P-GW. Here, the MME may make this determination depending on whether the UE is in the “IDLE state” or the “ACTIVE state”.

  For example, when the UE is in the “ACTIVE state”, the MME decides to perform the PDN connection reconfiguration process when a certain time has elapsed or when the UE transitions to the “IDLE state”. May be.

  In addition, when the UE is in the “IDLE state”, the MME may determine to perform the PDN connection reconfiguration process immediately or after the load balancing timer expires.

  In step S2004, a PDN connection resetting process is performed. The S / P-GW may delete the “PCRF failure flag” set in the EPS bearer context related to the UE after the completion of the PDN connection resetting process.

After the PDN connection resetting process is completed, the association between the reset PDN connection and the PCC connection # 1 is reset in step S2005.
Here, it is assumed that the PCC connection # 1 is reset when the failure in the PCRF is recovered. If the failure in the PCRF has not been recovered, the PCC connection # 1 may be reset by connecting to another PCRF.

  In step S2006, "Application Registration" for the UE is performed.

  In step S2007, the PDN connection, the PCC connection # 1, and the PCC connection # 2 are associated. Here, it is assumed that the PCC connection # 2 is reset when the failure in the PCRF is recovered. Further, if the failure in the PCRF has not been recovered, the PCC connection # 2 may be reset by connecting to another PCRF.

  The detailed operation of the above-described PDN connection resetting process will be described below with reference to FIGS.

  First, an operation example 1 of the above-described PDN connection resetting process will be described with reference to FIG.

  As shown in FIG. 4, in step S101, the P-GW transmits “Delete Bearer Request” including “Cause = PCRF failure” to the S-GW. The “Delete Bearer Request” is a message requesting to release the PDN connection related to the UE.

  In step S102a, the S-GW transmits “Delete Bearer Request” including “Cause = PCRF failure” to the MME. In step S102b, the S-GW transmits “Delete” including “Cause = PCRF failure” to the SGSN. Send “Bearer Request”.

  Here, instead of “Delete Bearer Request” including “Cause = PCRF failure”, the P-GW or S-GW may be an existing partial filer message, an existing or new message (for example, a failure notification signal, etc.). ) May be sent.

  In step S103, the MME should transmit “Deactivate Bearer Request” to the eNB (FIG. 4), should transmit “Detach Request” to the UE (FIG. 5), or to the S-GW It is determined whether or not “intra-network bearer reconfiguration request” should be transmitted (FIG. 6).

  In the example of FIG. 4, in step S103, the MME determines that “Deactivate Bearer Request” should be transmitted to the eNB. In step S104, the MME transmits “ESM Cause = Reactivation Requested due to network” to the eNB. “Deactivate Bearer Request” including “failure” is transmitted.

  Note that a parameter different from “ESM Cause = Reactivation Requested due to network failure” may be set as a parameter in “Deactivate Bearer Request”.

  In step S105, the eNB transmits “RRC Connection Reconfiguration” to the UE, and in step S106a, the UE transmits “RRC Connection Reconfiguration Complete” to the eNB.

  In Step S106b, the eNB transmits “Deactivate Bearer Response” to the MME.

  In Step S107a, the UE transmits “Direct Transfer” to the eNB, and in Step S107b, the eNB transmits “Deactivate EPS Bearer Context Accept” to the MME.

  In step S107c, the MME transmits “Notify Request” to the HSS, and in step S107d, the HSS transmits “Notify Response” to the MME. Note that step 107c and step S107d may be omitted.

  In step S108a, the MME transmits “Delete Bearer Response” to the S-GW, and in step S108b, the SGSN transmits “Delete Bearer Response” to the S-GW. Note that step S102b and step SS108b may be omitted.

  In step S109, the S-GW transmits “Delete Bearer Response” to the P-GW, and in step S1010, the UE activates a PDN connection setting process.

  Second, an operation example 2 of the above-described PDN connection resetting process will be described with reference to FIG.

  As shown in FIG. 5, in step S201, the P-GW transmits “Delete Bearer Request” including “Cause = PCRF failure” to the S-GW.

  In step S202a, the S-GW transmits “Delete Bearer Request” including “Cause = PCRF failure” to the MME. In step S202b, the S-GW transmits “Delete” including “Cause = PCRF failure” to the SGSN. Send “Bearer Request”.

  Here, the S-GW transmits an existing partial filer message or an existing or new message (for example, a failure notification signal) instead of “Delete Bearer Request” including “Cause = PCRF failure”. May be.

  In step S203, the MME should transmit “Deactivate Bearer Request” to the eNB (FIG. 4), should transmit “Detach Request” to the UE (FIG. 5), or to the S-GW It is determined whether or not “intra-network bearer reconfiguration request” should be transmitted (FIG. 6).

  In the example of FIG. 5, the MME determines that “Detach Request” should be transmitted to the UE in Step S203, and in Step S204, “Detach Type = Re-Attach Required” and Send “Detach Request” including “EMM Cause = Network Failure”.

  Note that the parameters in “Detch Request” may be different from those in “Detch Type = Re-Attach Required” and “EMM Cause = Network Failure”.

  In step S205a, the UE transmits a “Detach Accept” to the MME after performing the Detach process.

  In step S205b, the MME transmits “Notify Request” to the HSS, and in step S205c, the HSS transmits “Notify Response” to the MME. Note that step S205b and step S205c may be omitted.

  In step S206a, the MME transmits “Delete Bearer Response” to the S-GW, and in step S206b, the SGSN transmits “Delete Bearer Response” to the S-GW. Note that step S202b and step S206b may be omitted.

  In step S207, the S-GW transmits “Delete Bearer Response” to the P-GW, and in step S208, the UE activates the Attach process and the PDN connection setting process.

  Third, an operation example 3 of the above-described PDN connection resetting process will be described with reference to FIG.

  As shown in FIG. 6, in step S3001, the P-GW transmits “PCRF failure information (new message)” to the S-GW. Here, the “PCRF failure information” includes at least one of UE identification information such as IMSI (International Mobile Subscriber Identity) and bearer identification information (bearer including a PDN connection, PCC connection # 1, and PCC connection # 2). It is included.

  Here, the P-GW may transmit a “Delete Bearer Request” including the above “Cause = PCRF failure” instead of the “PCRF failure information”, an existing partial filer message, and the like. PCRF failure information may be transmitted by an existing message or the like.

  In step S3002, the S-GW transmits the “PCRF failure information” to the MME. Here, the “PCRF failure information” includes at least one of UE identification information and bearer identification information.

  Here, instead of the “PCRF failure information”, the S-GW uses the “Delete Bearer Request” including “Cause = PCRF failure”, the existing partial filer message, other existing messages, and the like as the PCRF failure information. May be sent.

  In step S3003, the MME should transmit “Deactivate Bearer Request” to the eNB (FIG. 4), should transmit “Detach Request” to the UE (FIG. 5), or to the S-GW It is determined whether or not “intra-network bearer reconfiguration request” should be transmitted (FIG. 6).

  In the example of FIG. 6, in step S3003, the MME determines that an “intra-network bearer reconfiguration request” should be transmitted to the S-GW, and in step S3004, for the S-GW, Intra-bearer reconfiguration request "is transmitted.

  The MME may transmit an existing “Create Session Request”, “Modify Bearer Request”, or the like instead of the “intra-network bearer reconfiguration request”.

  Here, the “intra-network bearer reconfiguration request” includes UE identification information or bearer identification information, the above-described “PCRF failure information”, P-GW information, and the like.

  In step S3005, the S-GW transmits the “intra-network bearer reconfiguration request” to the P-GW. Here, the “intra-network bearer reconfiguration request” includes at least one of UE identification information and bearer identification information, the above-described “PCRF failure information”, and the like.

  The S-GW may transmit an existing “Create Session Request”, “Modify Bearer Request”, or the like instead of the “intra-network bearer reconfiguration request”.

  In step S3006, the P-GW overwrites the information related to the PCC connection # 1, and resets the association between the PDN connection and the PCC connection # 1. Here, the association of the PDN connection, the PCC connection # 1, and the PCC connection # 2 may be reset together.

  Next, a specific example 2 of the operation of the mobile communication system according to the present embodiment will be described with reference to FIG.

  When the P-CSCF detects the occurrence of a PCRF failure (step S4001) in step S4003, the P-CSCF transmits a SIP signal to the UE in step S4004. Here, the SIP signal includes at least one of “PCRF failure information” indicating that a failure has occurred in the PCRF and “Re-Registration request” requesting re-registration to the UE.

  Here, as the re-registration, “Application Registration” such as “IMS Registration” is assumed.

  In step S4005, the UE performs such re-registration (Re-Registration), and transmits a SIP signal indicating that to the P-CSCF.

  In step S4006, the association between the PDN connection, the PCC connection # 1, and the PCC connection # 2 is reset. In such processing, the PCC connection # 2 may be reset.

  According to the mobile communication system according to the present embodiment, when a predetermined event is detected after a failure has occurred in the PCRF, the association between the PDN connection, the PCC connection # 1, and the PCC connection # 2 is reset. It is possible to perform transmission processing and incoming processing of communication using PCC control.

  The characteristics of the present embodiment described above may be expressed as follows.

  The first feature of the present embodiment is that a PDN connection (first connection) set between a UE (mobile station) and a P-GW (gateway device), a PCRF (policy and charging server device), and a P -A mobile communication method for performing communication using the PCC connection # 1 (second connection) set up with the GW, and the P-GW detects a predetermined event after detecting a PCRF failure. In this case, the gist of the present invention is to include a process A for resetting the association between the PDN connection and the PCC connection # 1.

  In the first feature of the present embodiment, in step A, the P-GW may determine whether or not to perform the above-described reconfiguration according to at least one of the UE state and the congestion state.

  In the first feature of the present embodiment, in the process A, when the P-GW detects a predetermined event after detecting a failure of the PCRF, a request for opening a PDN connection is made to the MME (mobile management node). (For example, “Delete Bearer Request”), a step in which the MME requests an eNB (radio base station) to release a PDN connection in response to a PDN connection release request, and a PDN After the connection is released, there may be a step of setting a new PDN connection and a step of associating the newly set PDN connection and PCC connection # 1.

  In the first feature of the present embodiment, the step A includes a step of transmitting a PDN connection release request to the MME when the P-GW detects a predetermined event after detecting a failure of the PCRF. , A step in which the MME requests the UE to perform a Re-attach process, a step in which the Attach process for the UE is performed after the Delete process for the UE is performed, and a new PDN connection is set And a step of associating the newly set PDN connection and PCC connection # 1.

  In the first feature of the present embodiment, the step A includes a step of transmitting a PDN connection release request to the MME when the P-GW detects a predetermined event after detecting a failure of the PCRF. The MME sets a new PCC connection # 1 for the P-GW without requesting the eNB to release the radio connection between the eNB and the UE in the PDN connection. There may be a requesting step and a step of associating the PDN connection and the newly set PCC connection # 1.

  The second feature of the present embodiment is that the PDN connection set between the UE and the P-GW, the PCC connection # 1 set between the PCRF and the P-GW, the PCRF and the P- A mobile communication method in which communication is performed using a PCC connection # 2 (third connection) set with a CSCF (call session control server device), and the P-CSCF detects a PCRF failure After that, the gist of the present invention is to include a process A for resetting the association between the PDN connection, the PCC connection # 1, and the PCC connection # 2 when a predetermined event is detected.

  In the second feature of the present embodiment, the step A includes a step of requesting the UE to perform re-registration when the P-CSCF detects a predetermined event after detecting a failure of the PCRF. After re-registration of the UE, the association between the PDN connection, the PCC connection # 1, and the PCC connection # 2 may be reset.

  The third feature of the present embodiment is the P-GW, which is configured to reset the association between the PDN connection and the PCC connection # 1 when a predetermined event is detected after detecting a PCRF failure. It is a summary.

  A fourth feature of the present embodiment is an MME, which receives a PDN release request including predetermined information (for example, Cause = PCRF failure) indicating that a PCRF failure has been detected from the P-GW. The gist is that the UE is configured to request the UE to perform the Re-attach process.

  The fifth feature of the present embodiment is the MME, and when receiving a PDN release request including predetermined information (for example, Cause = PCRF failure) indicating that a PCRF failure has been detected from the P-GW, Request the eNB to set a new PCC connection # 2 to the P-GW without requesting to release the radio connection between the eNB and the UE in the PDN connection The gist is that it is configured.

  The fifth feature of the present embodiment is the P-CSCF. When a predetermined event is detected after detecting a failure of the PCRF, the association between the PDN connection, the PCC connection # 1, and the PCC connection # 2 is re-established. The gist is that it is configured to perform setting.

  Here, the S-GW may have the same function as the above-described P-GW.

  Note that the operations of the above-described UE, eNB, MME, S-GW, P-GW, PCRF, P-CSCF, and HSS may be implemented by hardware or by a software module executed by a processor. Or it may be implemented by a combination of both.

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a hard disk, a registerable ROM, a hard disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the UE, eNB, MME, S-GW, P-GW, PCRF, P-CSCF, or HSS. In addition, the storage medium and the processor may be provided in the UE, eNB, MME, S-GW, P-GW, PCRF, P-CSCF, and HSS as discrete components.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

UE ... mobile station eNB, NodeB ... radio base station RNC ... radio network controller MME ... mobility management node SGSN ... packet switch S-GW, P-GW ... gateway device PCRF ... policy and charging server device P-CSCF ... call session control Server device HSS ... Subscriber information management server device

The present invention relates to a communication method, a mobile communication system, a PGW, a PGW control method, a mobile station, and a mobile station control method .

Therefore, the present invention has been made in view of the above-described problems, and when a failure occurs in the PCRF, or when the PCRF resumes after such failure, communication outgoing processing and incoming processing using PCC control are performed. It is an object to provide a communication method, a mobile communication system, a PGW, a PGW control method, a mobile station, and a mobile station control method that can be performed.

A communication method according to the present invention is a communication method in a mobile communication system comprising a mobile station (UE), a PGW (PDN Gateway), and a PCRF (Policy and Charging Rules Function), and changes of bearers related to the mobile station In the process, when the PGW knows that the PCRF has been resumed, the PGW releases a PDN (Packet Data Network) connection established between the mobile station and the PGW.

A mobile communication system according to the present invention includes a mobile station (UE), a PGW (PDN Gateway), and a PCRF (Policy and Charging Rules Function), and the PGW performs a bearer change process for the mobile station. When the PGF knows that the PCRF has been restarted, the PGW releases a PDN (Packet Data Network) connection established between the mobile station and the PGW.

A PGW according to the present invention is a PGW (PDN Gateway) used in a mobile communication system including a mobile station (UE) and a PCRF (Policy and Charging Rules Function), and performs a bearer change process for the mobile station. In addition, when it is known that the PCRF has been resumed, a PDN (Packet Data Network) connection established between the mobile station and the PGW is released.

A PGW control method according to the present invention is a PGW (PDN Gateway) control method used in a mobile communication system including a mobile station (UE) and a PCRF (Policy and Charging Rules Function), and relates to the mobile station. When the bearer changing process knows that the PCRF has been restarted, it releases a PDN (Packet Data Network) connection established between the mobile station and the PGW.

A mobile station according to the present invention is a mobile station (UE) used in a mobile communication system including a radio base station, a PGW (PDN Gateway), and a PCRF (Policy and Charging Rules Function). When the PGW knows that the PCRF has been resumed during the bearer change process, the mobile station uses the PGW to set the PDN (Packet) set between the mobile station and the PGW. (Data Network) connection is released.

A mobile station control method according to the present invention is a mobile station (UE) control method used in a mobile communication system including a radio base station, a PGW (PDN Gateway), and a PCRF (Policy and Charging Rules Function). When the PGW knows that the PCRF has restarted during the bearer change process for the mobile station, the mobile station uses the PGW to place the mobile station between the mobile station and the PGW. The set PDN (Packet Data Network) connection is released.

As described above, according to the present invention, when a failure occurs in the PCRF, or when the PCRF resumes after such failure, a communication method capable of performing communication outgoing processing and incoming processing using PCC control. , A mobile communication system, a PGW, a PGW control method, a mobile station, and a mobile station control method .

Claims (11)

A mobile communication method for performing communication using a first connection set between a mobile station and a gateway device and a second connection set between a policy and billing server device and the gateway device. And
The gateway apparatus includes a step A of resetting the association between the first connection and the second connection when the gateway apparatus detects a predetermined event after detecting a failure of the policy and the accounting server apparatus. Mobile communication method.   2. The mobile communication method according to claim 1, wherein, in the step A, the gateway device determines whether or not to perform the resetting according to at least one of a state of the mobile station and a congestion state. . Step A includes
A step of transmitting a request to release the first connection to a mobility management node when the gateway device detects the predetermined event after detecting a failure of the policy and charging server device;
The mobility management node requesting a radio base station to release the first connection in response to a request to release the first connection;
After the first connection is released, newly setting the first connection;
The mobile communication method according to claim 1, further comprising a step of associating the newly set first connection and the second connection. Step A includes
A step of transmitting a request to release the first connection to a mobility management node when the gateway device detects the predetermined event after detecting a failure of the policy and charging server device;
The mobility management node requesting the mobile station to perform a re-attach process;
After performing the Detach process for the mobile station, performing the Attach process for the mobile station and newly setting the first connection;
The mobile communication method according to claim 1, further comprising a step of associating the newly set first connection and the second connection. Step A includes
A step of transmitting a request to release the first connection to a mobility management node when the gateway device detects the predetermined event after detecting a failure of the policy and charging server device;
The mobility management node does not request the radio base station to release the connection between the radio base station and the mobile station in the first connection, and the Requesting to set up the second connection to
The mobile communication method according to claim 1, further comprising: associating the first connection with the newly set second connection. A first connection set between the mobile station and the gateway device, a second connection set between the policy and charging server device and the gateway device, and the policy and charging server device and call session control A mobile communication method for performing communication using a third connection set with a server device,
When the call session control server device detects a predetermined event after detecting a failure of the policy and billing server device, it resets the association between the first connection, the second connection, and the third connection. A mobile communication method comprising the step A of performing. Step A includes
Requesting the mobile station to perform re-registration when the call session control server device detects the predetermined event after detecting a failure of the policy and billing server device;
The mobile communication method according to claim 6, wherein after the re-registration of the mobile station is performed, the association between the first connection, the second connection, and the third connection is reset. Used in a mobile communication method in which communication is performed using a first connection set between the mobile station and the gateway device and a second connection set between the policy and billing server device and the gateway device. A gateway device,
A gateway device configured to reset the association between the first connection and the second connection when a predetermined event is detected after detecting a failure of the policy and the accounting server device . Used in a mobile communication method in which communication is performed using a first connection set between the mobile station and the gateway device and a second connection set between the policy and billing server device and the gateway device. A mobility management node,
When receiving a release request for the first connection including predetermined information indicating that a failure of the policy and the accounting server device has been detected from the gateway device, a Re-attach process is performed on the mobile station. A mobility management node that is configured to request. Used in a mobile communication method in which communication is performed using a first connection set between the mobile station and the gateway device and a second connection set between the policy and billing server device and the gateway device. A mobility management node,
When receiving from the gateway device a request for releasing the first connection including predetermined information indicating that a failure of the policy and the accounting server device has been detected, the wireless base station receives the wireless in the first connection. The gateway apparatus is configured to request to newly set the second connection without requesting to release a connection between a base station and the mobile station. The mobility management node. A first connection set between the mobile station and the gateway device, a second connection set between the policy and charging server device and the gateway device, and the policy and charging server device and call session control A call session control server device used in a mobile communication method for performing communication using a third connection set with a server device,
When a predetermined event is detected after detecting a failure of the policy and the accounting server device, the association between the first connection, the second connection, and the third connection is reset. A call session control server device.

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