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    • 专利摘要:
    mobile communication method, call control node, priority control node and mobility management node. the present invention relates to the steps of: at a priority control node (pcrf), when receiving an invitation signal including priority call information is notified from a call control node (p-cscf), determining whether it is requested to change the arp of a call control signal carrier to send the invitation signal from a communication port (p-gw) to a mobile terminal (ue) to an arp higher than the priority set on the call signal carrier. call control; when arp change is determined to be requested, changing the arp of the call control signal carrier to an arp greater than the arp established on the call control signal carrier; and performing a paging for the mobile terminal (UE) according to the priority of the call control signal carrier.
    公开号:BR112012016762B1
    申请号:R112012016762-6
    申请日:2010-12-14
    公开日:2021-08-03
    发明作者:Katsutoshi Nishida
    申请人:Ntt Docomo Inc；
    IPC主号:
    专利说明:

    Technical Field
    [001] The present invention relates to a mobile communication method, a call control node, a priority control node and a mobility management node, to perform call control between mobile terminals. Previous Technique
    [002] A mobile communication system to use an IMS (IP Multimedia Subsystem) is defined in non-patent literature 1. In this mobile communication system, when receiving a call connection request signal (for example, an INVITATION signal ( eg Evolved Package Core).Reference List Non-Patent Literature Non-Patent Literature 1: 3GPP TS23.228 Invention Summary Technical Problem
    [003] However, in the mobile communication system described above, there is a problem that even when a call connection request signal for a call to be prioritized (hereinafter "priority call") such as important communication is so on, for a mobile terminal UE, is received, the IMS is unable to perform paging for the mobile terminal UE regarding the priority call more preferably than for a mobile terminal UE regarding a normal call, in order to establish an IMS call control signal bearer to transfer the call connection request signal to the priority call.
    [004] Also, in the mobile communication system described above, even when paging to a mobile terminal UE regarding a priority call can be performed in order to establish an IMS call control signal bearer for the priority call, resources do not can be allocated to the IMS call control signal bearer for the priority call more preferably than to an IMS call control signal bearer for a normal call and therefore there is a problem where cases occur where the establishment of an IMS call control signal bearer for a failed priority call or an IMS call control signal bearer for a priority call having been established is disconnected.
    [005] Such problems will be described in detail with reference to figures 1 to 5.
    [006] Figure 1 is a diagram illustrating the first example of failure to establish an IMS call control signal carrier for a priority call. As illustrated in Figure 1, when an invite signal, which includes priority call information indicating reception of a priority call (step S1001), is received, the call control node P-CSCF (Session Control Function Proxy Call) transfers the received invitation signal to the communication port P-GW (PDN communication port) (step S1002).
    [007] The P-GW communication port sends a GTP-U (GPRS Tunneling Protocol - U plane) data packet or a PMIPv6 (Mobile IPv6 Proxy) data packet, including the invitation signal received in step S1002 , to the S-GW communication port (Server Communication Port) (step S1003).
    [008] Upon receiving the GTP-U data packet or the PMIP data packet indicated above, the S-GW communication port sends the "Down Link Data Notification" to an MME mobility management node (step S1004 ).
    [009] Here, the MME mobility management node is unable to decide whether a received "Down Link Data Notification" is or is not a signal related to a priority call or a signal related to a normal call. Consequently, the MME mobility management node in a congestion state is unable to perform forward processing for "Paging" in response to the "Down Link Data Notification" related to a priority call, as described above, more preferably than send processing to "Paging" for the "Down Link Data Notification" related to normal call and therefore discard the "Down Link Data Notification" related to priority call (step S1005).
    [0010] Thus, in the case illustrated in figure 1, there is a problem where a mobile terminal UE is unable to receive "Paging" related to a priority call and therefore an IMS call control signal bearer to transfer a call connection request signal for a priority call to the mobile terminal UE cannot be established between the mobile terminal UE and the communication port S-GW.
    [0011] Figure 2 is a diagram illustrating a second example of failure to establish an IMS call control signal carrier for a priority call. It should be noted that the operations of steps S2001 to S2004 in figure 2 are the same operations of steps S1001 to S1004 in figure 1.
    [0012] As illustrated in figure 2, upon receiving the "Downlink Data Notification" described above, the MME mobility management node sends "Paging" to a radio base station eNode B (step S2005).
    [0013] Here, the eNode B radio base station is unable to decide whether or not a "Paging" received is a signal related to a priority call or a signal related to a normal call. Consequently, the radio base station eNode B in a congestion state is unable to perform forward processing for the "Paging" related to a priority call, as described above, more preferably than forward processing for the related "Paging" with a normal call and therefore have to discard the "Paging" related to the priority call (step S2006).
    [0014] Thus, even in the case illustrated in figure 2, there is a problem where a UE mobile terminal is unable to receive the "Paging" related to a priority call and therefore an IMS call control signal bearer to transfer a call connection request signal for a priority call to the mobile terminal UE cannot be established between the mobile terminal UE and a gateway S-GW.
    [0015] Figure 3 is a diagram illustrating a third example of failure to establish an IMS call control signal carrier for a priority call. It should be noted that the operations of steps S3001 to S3005 in figure 3 are the same operations of steps S2001 to S2005 in figure 2.
    [0016] Upon receiving the "Paging" from the MME mobility management node, the radio base station eNode B sends the "Paging" to the mobile terminal UE located in the cell itself (step S3006). In response to the "Paging" received from the radio base station eNode B, the mobile terminal UE sends the "RRC Connection Request" to the radio base station eNode B (step S3007).
    [0017] Here, the eNode B radio base station is unable to determine whether or not a received "RRC Connection Request" is a signal related to a priority call or a signal related to a normal call. Consequently, the radio base station eNode B in a congestion state is unable to perform processing for the "RRC Connection Request" related to a priority call, as described above, more preferably than processing for the "RRC Connection Request " related to a normal call and therefore has to discard the "RRC Connection Request" related to the priority call (step S3008).
    [0018] Thus, in the case illustrated in figure 3, there is a problem that an RRC connection cannot be established between a UE mobile terminal and a radio base station eNode B and therefore an IMS call control signal carrier to transfer a call connection request signal for a priority call to the mobile terminal UE cannot be established between the mobile terminal UE and a communication S-GW.
    [0019] Figure 4 is a diagram illustrating a fourth example of failure to establish an IMS call control signal carrier for a priority call. It should be noted that the operations of steps S4001 to S4006 in figure 4 are the same operations as in steps S3001 to S3006 in figure 3.
    [0020] Upon receiving the "Paging" from the radio base station eNode B, the mobile terminal UE performs the "RRC Connection Establishment Procedure" to establish an RRC connection with the radio base station eNode B (step S4007). The mobile terminal UE sends the "Service Request" to request establishment of a radio access bearer (E-RAB: EPS Radio Access Bearer) between the mobile terminal UE and the communication port S-GW, to the node MME mobility management tool (step S4008).
    [0021] Upon receiving the "Service Request" from the UE mobile terminal, the MME mobility management node sends the "Initial Context Configuration Request" to the radio base station eNode B (step S4009).
    [0022] Here, the eNode B radio base station is unable to determine whether a received "Initial Context Configuration Request" is a signal related to a priority call or a signal related to a normal call. Consequently, the radio base station eNode B in a congestion state is unable to perform processing for the "Initial Context Configuration Request" related to a priority call, as described above, more preferably than processing for the "Initial Context Request" Initial Context Setting" related to a normal call and therefore have to discard the "Initial Context Setting Request" related to the priority call (step S4010).
    [0023] Thus, in the case illustrated in Figure 4, there is a problem that a radio access bearer cannot be established between a UE mobile terminal and an S-GW communication port and therefore a control signal bearer The IMS call for transferring a call connection request signal for a priority call from a call control node P-CSCF to the mobile terminal UE cannot be established between the mobile terminal UE and the communication port S-GW.
    [0024] Figure 5 is a diagram illustrating an example where an IMS call control signal carrier for a priority call is disconnected. As illustrated in Fig. 5, an IMS call control signal carrier for sending and receiving an IMS call control signal for a priority call between the communication port P-GW and the mobile terminal UE #1 of a common user is established (step S5001). Next, assume that an IMS call control signal carrier for sending and receiving an IMS call control signal for a normal call between the communication port P-GW and the mobile terminal UE #2 of a priority user is established (step S5002).
    [0025] Here, since the user of mobile terminal UE #2 is a priority user, in a call control signal bearer for a normal call addressed to mobile terminal UE #2, a priority higher than the priority of a IMS call control signal bearer for a priority call addressed to the mobile terminal UE #1 of a common user is defined. Consequently, the radio base station eNode B allocates resources to the IMS call control signal bearer for a normal call addressed to mobile terminal UE #2 of a priority user preferentially and therefore, when resources are exhausted, has to discard the IMS call control signal bearer for a priority call addressed to the mobile terminal UE #1 of a common user (step S5003).
    [0026] Thus, in the case illustrated in Figure 5, in the event that resources are preferentially allocated to the IMS call control signal bearer for the priority user, there is a problem where the IMS call control signal bearer stops the ordinary user is disconnected regardless of whether communication related to a priority call is made or not.
    [0027] Also, after the IMS call control signal bearer for a UE #1 priority call addressing mobile terminal is disconnected, if the call control node P-CSCF receives an IMS call control signal for a priority call (eg a SIP signal) (step S5004), the call control node P-CSCF transfers the received IMS call control signal to the communication port P-GW (step S5005) and as described with reference to figures 1 to 4, attempts to re-establish the disconnected IMS call control signal carrier (steps S5006 to S5009).
    [0028] However, as described above, each apparatus that is in a congestion state is unable to perform processing for a signal related to a priority call more preferentially than processing for a signal related to a normal call and therefore has which discards the signal related to a priority call (eg step S5009). Consequently, in the case illustrated in Fig. 5, there is a problem that the IMS call control signal carrier for a priority call addressing mobile terminal UE #1 cannot be re-established.
    [0029] The present invention was created in view of the aforementioned problems and, therefore, it is an objective of the present invention to provide a mobile communication method, a call control node, a priority control node and a call management node. mobility which, in case a priority call to a mobile terminal UE is received, allow an IMS call control signal bearer for the priority call to be established more preferentially than an IMS call control signal bearer for a call and allow the IMS call control signal for the priority call to be transferred preferentially. Solution to Problem
    [0030] The first feature of the present invention is a mobile communication method that includes the steps of: at a call control node, notifying receipt of a call connection request signal, including priority call information, to a node priority control; at the priority control node, in response to a notification of receipt of the call connection request signal from the call control node, determine whether it is requested to change a priority of a call control signal carrier to send the signal requesting a call connection from a first communication port connected to the call control node to a mobile terminal, to a priority higher than a priority set on the call control signal carrier; changing the priority of the call control signal carrier to a priority higher than the priority set on the call control signal carrier when it is requested to change the priority of the call control signal carrier; and performing a paging for the mobile terminal according to the priority of the call control signal carrier.
    [0031] A second feature of the present invention is a call control node configured to receive a call connection request signal including priority call information, notify a reception of the call connection request signal to a call control node. priority controlling a priority of a call control signal carrier which is established to send the call control request signal between a first communication port and a mobile terminal, and send the call connection request signal to the first communication port, wherein the call control signal carrier is established according to a priority that is assigned by the priority control node.
    [0032] A third feature of the present invention is a priority control node configured to determine, when notified from a call control node that a call connection request signal including priority call information has been received, whether or not it is required to change a priority of a call control signal carrier to send the call connection request signal from a first communication port connected to the call control node, to a mobile terminal, to a higher priority that a priority established on the call control signal bearer.
    [0033] A fourth feature of the present invention is a mobility management node configured to receive a carrier update request signal including a priority greater than a priority established in the call control signal carrier, and send when the priority included in the carrier update request signal is a priority that requests to perform paging preferably, a paging signal including a priority indication that requests to perform paging preferentially to a radio base station belonging to the mobility management node, most preferably than a paging signal not including the priority indication. Technical Advantages of Invention
    [0034] According to the present invention, it is possible to provide a mobile communication method, a call control node, a priority control node and a mobility management node that, in the case of a priority call to a terminal mobile UE is received, allowing an IMS call control signal bearer for the priority call to be established more preferentially than an IMS call control signal bearer for a normal call, and allowing the IMS call control signal for the priority call to be transferred preferentially. Brief Description of Drawings
    [0035] Figure 1 is a sequence diagram illustrating conventional operations upon receipt of a priority call;
    [0036] Figure 2 is a sequence diagram illustrating conventional operations upon receipt of a priority call;
    [0037] Figure 3 is a sequence diagram illustrating conventional operations upon receipt of a priority call;
    [0038] Figure 4 is a sequence diagram illustrating conventional operations upon receipt of a priority call;
    [0039] Figure 5 is a sequence diagram illustrating conventional operations upon receipt of a priority call;
    [0040] Figure 6 is a schematic diagram of the configuration of a mobile communication system according to the first modality;
    [0041] Figure 7 is a diagram for explaining ARPs according to the first modality;
    [0042] Figure 8 is a schematic diagram illustrating operations upon reception of a priority call, according to the first mode;
    [0043] Figure 9 is a sequence diagram illustrating operations upon reception of a priority call, according to the first mode;
    [0044] Figure 10 is a flowchart illustrating operations upon reception of a priority call, according to the first mode;
    [0045] Figure 11 is a flowchart illustrating operations upon reception of a priority call, according to the first mode;
    [0046] Figure 12 is a sequence diagram illustrating operations in releasing a priority call, according to the first mode;
    [0047] Figure 13 is a flowchart illustrating operations in releasing a priority call, according to the first mode;
    [0048] Figure 14 is a schematic diagram illustrating operations upon reception of a priority call, according to a second mode;
    [0049] Figure 15 is a sequence diagram illustrating operations upon reception of a priority call, according to a second mode; and
    [0050] Figure 16 is a sequence diagram illustrating operations at the end of a priority call, according to a second modality. Description of Modalities
    [0051] Now, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First Mode Mobile Communication System Configuration
    [0052] Figure 6 is a diagram illustrating a configuration of a mobile communication system. The mobile communication system is formed with an IMS that offers IP-based multimedia communication services such as VoIP, an EPC network that transfers IP packets, a UE mobile terminal and an eNode B radio base station that performs LTE scheme radio communication with the UE mobile terminal and connects that UE mobile terminal to the EPC network.
    [0053] It should be noted that the present invention is applicable to cases where the UE mobile terminal is connected to the EPC network by means of radio communication of the UMTS/GPRS scheme. In this case, the mobile terminal UE performs radio communication of the UMTS/GPRS scheme with the radio base station NodeB/BTS (not shown), and is also connected to an S-GW communication port of the EPC network by means of a control device RNC/BSC radio stations and to an SGSN switchboard (not shown).
    [0054] As illustrated in Fig. 6, in IMS, an S-CSCF call control node and a P-CSCF call control node that perform call control between mobile UEs using SIP are provided. Also, in the EPC network, a priority control node PCRF (Charging and Policy Rules Function) for controlling QoS in the UE mobile terminal communication, a communication port P-GW which is connected to the call control node P- CSCF, an S-GW communication port that is connected to the P-GW communication port, and an MME mobility management node that performs mobility management of the UE mobile terminal are provided.
    [0055] Also, in EPC network, GTP (GPRS Tunneling Protocol) or PMIPv6 (Mobile IPv6 Proxy) is used as the signal protocol between the P-GW communication port and the S-GW communication port. In case GTP is used, priority control node P-CRF is connected to P-GW communication port, but not connected to S-GW communication port. It should be noted that, in case GTP is used, a GTP tunnel is configured between the P-GW communication port and the S-GW communication port. On the other hand, in case PMIPv6 is used, the PCRF priority control node is connected to both the P-GW communication port and the S-GW communication port. It should be noted that, in case PMIPv6 is used, a GRE (Generic Routing Encapsulation) tunnel is configured between the P-GW communication port and the S-GW communication port.
    [0056] In the mobile communication system illustrated in figure 6, an IMS call control signal carrier (call control signal carrier) is established between the communication port P-GW and the mobile terminal UE. Here, the IMS call control signal bearer refers to a logical communication path for sending and receiving IMS call control signals such as a SIP signal between the communication port P-GW and the mobile terminal UE, and is a carrier to be configured in "IP-CAN (IP-Network Access and Connectivity)". Also, the IMS call control signal carrier is formed by connecting the GTP tunnel or GRE tunnel that is configured between the P-GW communication port and the S-GW communication port, and the radio access carrier that is configured between the S-GW communication port and the UE mobile terminal.
    [0057] Also, in the IMS call control signal bearer, ARP (Allocation and Hold Priority), which indicates relative priority between IMS call control signal bearers, is defined. The PCRF priority control node controls the ARP (priority) of the IMS call control signal bearer and, as illustrated in Figure 7, the IMS call control signal bearer ID and ARP are associated and managed . ARP is set according to the priority of the mobile terminal user UE and, for example, it is set to "9 ... high priority" if the mobile terminal user UE is a priority user, or it is set to "10 ... medium priority" if the UE mobile terminal user is a common u-user.
    [0058] Radio resources and network resources are allocated to the IMS call control signal bearer according to the priority indicated by the ARP, and an IMS call control signal bearer having a high priority indicated by the ARP is established preferably. To be more specific, procedure for establishing an IMS call control signal bearer having a high priority indicated by the ARP (i.e. a paging procedure for the mobile terminal UE in an idle state, an RRC connection establishment procedure between the mobile terminal UE and the radio base station eNode B, a radio access bearer establishment procedure between the mobile terminal UE and the communication port S-GW, a procedure of establishing GTP tunnel or PMIP GRE tunnel between the S-GW communication port and P-GW communication port and so on) are performed more preferentially than procedure to establish an IMS call control signal carrier having a low priority indicated by the ARP.
    [0059] In the mobile communication system illustrated in Figure 6, when an invitation signal (call connection request signal) that includes priority call information indicating a call to be prioritized (hereinafter "priority call") such as communication important is received from the mobile terminal UE on the originating side, the call control node P-CSCF notifies receipt of an invite signal including priority call information, to the priority control node PCRF.
    [0060] Also, in response to notification of receipt of an invite signal including call priority information from the call control node P-CSCF, the priority control node PCRF determines whether it is requested to change the ARP of the signal carrier. IMS call control to send the invitation signal to the mobile terminal for an ARP greater than the ARP that is set.
    [0061] For example, in the case where the bearer ID of the IMS call control signal bearer for a priority call is the bearer ID "00003" of figure 7, the priority control node PCRF determines that it is requested change the ARP "11 (low priority)", which is set in advance, to "9 (high priority)" to increase the priority of the IMS call control signal bearer. On the other hand, in the case where the carrier ID of the IMS call control signal carrier for a priority call is the carrier ID "00001" of Fig. 7, the priority control node PCRF determines that no change is requested. the ARP "9 (high priority)", because the priority of the IMS call control signal bearer is already set to high.
    [0062] When the PCRF priority control node determines that it is requested to change the ARP of the IMS call control signal carrier, in the mobile communication system illustrated in Figure 6, a processing to change the ARP value of the signal carrier The IMS call control to a value to indicate a priority higher than the ARP value that is set in advance is executed.
    [0063] Thus, in the mobile communication system illustrated in figure 6, in the case where the call control node P-CSCF receives an invitation signal that includes priority call information, the ARP (priority) of a carrier IMS call control signal to send the invitation signal to the mobile terminal is changed to larger, so that it is possible to configure an IMS call control signal carrier for a priority call more preferentially than a control signal carrier call the IMS call for a normal call, and transfer an invitation tone for a priority call preferably. Mobile Communication System Operations
    [0064] Next, referring to figures 8 to 13, the operations of the mobile communication system according to the first mode will be described. A case will be described below with the first mode where GTP is used as the signal protocol between the P-GW communication port and the S-GW communication port. Operations Upon Priority Call Reception
    [0065] Now, with reference to figures 8 to 11, the operations of the mobile communication system according to the first mode upon reception of a priority call will be described. Figures 8 and 9 are a schematic diagram and a sequence diagram illustrating the operations of the mobile communication system according to the first mode upon reception of a priority call. It should be noted that the same codes in figures 8 and 9 designate the same steps.
    [0066] As illustrated in figures 8 and 9, upon receiving an invitation signal (call connection request signal) (step S101), the call control node P-CSCF determines whether or not priority call information is included in the received invitation signal (step S102).
    [0067] In the case where the received invite signal includes priority call information, the call control node P-CSCF sends "priority call information notification", which notifies receipt of an invite signal for a call priority, to the PCRF priority control node, and the PCRF priority control node sends the "Acknowledgement", which notifies receipt of the "priority call information notification", to the P-CSCF call control node ( step S103).
    [0068] Upon receiving the "priority call information notification" from the PCRF priority control node, the call control node P-CSCF determines whether it is requested to change the ARP of the IMS call control signal bearer to send the invitation signal to the UE mobile terminal (step S104).
    [0069] Fig. 10 is a flowchart for determining whether to change the ARP of an IMS call control signal carrier in priority control node PCRF is requested. As illustrated in Figure 10, upon receiving the "priority call information notification" from the call control node P-CSCF, the priority control node PCRF determines whether the received "priority call information notification" is or not a notification to a UE mobile terminal of a priority user (step S1041).
    [0070] In the case where it is determined that the "priority call information notification" is a notification to a UE mobile terminal of a priority user (step 51041: Yes), since the ARP of the call control signal carrier IMS is already set to "9 (high priority)", the priority control node P-CRF determines that it is not requested to change the ARP of the IMS call control signal carrier, and notifies this to the call control node P-CSCF (step S1042). For example, in the case illustrated in Fig. 7, the priority control node PCRF determines that it is not requested to change the ARP of the IMS call control signal bearer of bearer ID "00001".
    [0071] On the other hand, in the case where it is determined that the "priority call information notification" is not a notification to a UE mobile terminal of a priority user (step S1041: No), since the ARP of the IMS call control signal is not set to "9 (high priority)", the PCRF priority control node determines that it is requested to change the ARP of the IMS call control signal bearer, and starts the process of changing the ARP (step S1043). For example, in the case illustrated in Fig. 7, priority control node PCRF determines that it is requested to change the ARP of the IMS call control signal bearer of bearer ID "00003".
    [0072] By means of the determination flowchart indicated above, when the processing of changing the ARP of the IMS call control signal carrier is determined to be requested, the processing of changing ARP is performed in steps S105 to S121 illustrated in Figures 8 and 9. To be more specific, the PCRF priority control node sends the "Provision of Guidelines and Loading Rules" to the P-GW communication port (step S105). Here, "Provision of Guidelines and Loading Rules" functions as a priority change request signal to request change of the ARP from the IMS call control signal bearer to a priority call ARP, and includes a bearer ID for identify the IMS call control signal bearer, and a priority call ARP. Also, a priority call ARP refers to an ARP of a higher priority than the ARP that is set in advance on the IMS call control signal bearer and, for example, is an ARP that is set to 9 (high priority).
    [0073] The P-GW communication port sends the "Refresh Carrier Request", which includes the carrier ID and priority call ARP included in the "Carrying and Policy Rules Provision", to the S communication port -GW (step S106). Here, "Carrier Update Request (carrier update request signal)" requests update of IMS call control signal carrier parameter and, when an ARP is included, request change of control signal carrier ARP call IMS.
    [0074] The S-GW communication port transfers the "Refresh Carrier Request", received from the P-GW communication port, to the MME mobility management node (step S107).
    [0075] Upon receiving the "Update Carrier Request" described above, the MME mobility management node determines whether or not it is requested to perform paging (priority paging) preferentially to the mobile terminal UE (step S108).
    [0076] Fig. 11 is a flowchart for determining whether or not priority paging is requested for a UE mobile terminal. As illustrated in Figure 11, upon receiving the "Refresh Carrier Request" from the S-GW communication port, the MME mobility management node determines whether or not the mobile terminal UE is in a connected state (step S1081).
    [0077] In the case where the UE mobile terminal is in a connected state (step S1081: Yes), the MME mobility management node does not have to perform the paging procedure for the UE mobile terminal and therefore sends the " Carrier Modification Request" for the eNode B radio base station (step S1082).
    [0078] In the case that the UE mobile terminal is not in a connected state (step S1081: No), the MME mobility management node determines whether the "Refresh Carrier Request" received from the communication port S-GW requests IMS call control signal carrier ARP change (step S1083).
    [0079] In the case that the "Refresh Carrier Request" received from the S-GW communication port requests ARP change (step S1083: Yes), the MME mobility management node determines whether the ARP is included in the "Request for Update Carrier" is or is not an ARP (eg, "11 (high priority)") that requests to perform paging preferentially (step S1084). In the case where the ARP requests to perform paging preferentially (step S1084: Yes), the MME mobility management node includes a priority indication, which requests to perform paging in preference to the paging signal (step S1085).
    [0080] On the other hand, in the case where the "Update Carrier Request" does not request to change the ARP of the IMS call control signal carrier (step S1083: No), or in the case where the ARP included in the " Update Carrier Request" is not an ARP that requests to perform paging preferentially (step 51084: No), the MME mobility management node does not include the priority indication described above for the paging signal (step S1086).
    [0081] By means of the decision flowchart indicated above, in the case where it is determined that priority paging has to be performed, priority paging is performed in steps S109 to S111 illustrated in figures 8 and 9. To be more specific, the MME mobility management node sends the "Paging", including the priority indication described above, to the radio base station eNode B (step S109). Upon receiving "Paging" including a priority indication, the radio base station eNode B allocates radio resources to "Paging" including a priority indication, more preferably than "Paging" not including a priority indication (step S110). The radio base station eNode B sends the "Paging" to the mobile terminal UE using the allocated radio resources (step S111).
    [0082] Upon receiving the "Paging" from the radio base station eNode B, the mobile terminal UE sends the "RRC Connection Setup" to configure an RRC connection to the mobile terminal UE (step S112), and receives the "Configuration of RRC connection" from the eNode B radio base station (step S113). The mobile terminal UE sends the "RRC Connection Completion", which includes the "Service Request", to the radio base station eNode B (step S114).
    [0083] The eNode B radio base station sends the "S1-AP Initial UE Message", which includes the "Service Request", to the MME mobility management node (step S115), and the mobility management node MME mobility sends the "S1-AP Initial Context Configuration Request" to the eNode B radio base station (step S116).
    [0084] Upon receiving the "Initial Context Configuration Request S1-AP" from the mobility management node MME, the radio base station eNode B configures a radio bearer with the mobile terminal UE (step S117), and sends the "S1-AP Initial Context Configuration Request Completion" for MME mobility management node (step S118).
    [0085] The MME mobility management node sends the "Refresh Carrier Response" to the communication port S-GW (step S119). This "Refresh Bearer Response" notifies that the parameter (here, the ARP) of the IMS call control signal bearer has been changed, and includes a bearer ID that identifies the IMS call control signal bearer.
    [0086] The S-GW communication port transfers the "Refresh Carrier Request" received from the MME mobility management node to the P-GW communication port (step S120). Upon receiving the "Refresh Carrier Request" from the S-GW communication port, the P-GW communication port sends the "Confirmation", which notifies that the ARP of the IMS call control signal carrier has been changed, to PCRF priority control node (step S121).
    [0087] Priority control node PCRF sends "carrier update completion notification", which notifies that IMS call control signal carrier ARP change is complete, to call control node P- CSCF (step S122). In response to this notification of completion of the IMS call control bearer update procedure, the call control node P-CSCF transfers an invite signal, including call priority information, to the communication port P-GW. Using the changed IMS call control signal bearer, the P-GW communication port sends the invitation signal which includes call priority information to the UE mobile terminal, via the S-GW communication port and the base station. eNode B radio (step S123). Priority Call Release Operations
    [0088] The operations of the mobile communication system according to the first mode in releasing a priority call will now be described with reference to figures 12 and 13. Figure 12 is a sequence diagram illustrating the operations of the mobile communication system of according to the first mode in releasing a priority call.
    [0089] Upon detecting a release of a priority call that has been initiated by the invitation signal described above (step S201), the call control node P-CSCF sends the "priority call release notification", which notifies that the priority call has been released, to the PCRF priority control node, and the PCRF priority control node sends the "Acknowledgement", which notifies receipt of the "priority call release notification", to the call control node P-CSCF (step S202).
    [0090] Upon receiving the "priority call release notification" from the P-CSCF call control node, the PCRF priority control node determines whether it is requested to retrieve the ARP from the IMS call control signal bearer (step S203 ).
    [0091] Fig. 13 is a flowchart for determining whether to retrieve the ARP of the IMS call control signal bearer in the priority control node PCRF. As illustrated in Figure 13, upon receiving the "priority call release notification" from the P-CSCF call control node, the PCRF priority control node determines whether the "priority call release notification" is a notification for a priority user, that is, whether the ARP that is currently configured on the IMS call control signal bearer and the ARP that is originally established on the IMS call control signal bearer match or not (step S2031). It should be noted that the PCRF priority control node may retain the ARP that is originally established on the IMS call control signal bearer, at the node itself, or may obtain it from an HSS subscriber management server (not shown) .
    [0092] In the case where the "priority call release notification" is a notification to a priority user, that is, in the case where the ARP that is currently configured and the ARP that is originally configured match (step S2031: Yes ), the priority control node PCRF determines that it is not requested to retrieve the ARP from the IMS call control signal carrier for the ARP that is originally configured, and notifies this to the call control node P-CSCF (step S2032) .
    [0093] On the other hand, in the case where the "priority call release notification" is not a notification for a priority user, that is, in the case where the ARP that is currently configured and the ARP that is originally configured is not match (step S2031: No), the PCRF priority control node determines that it is requested to retrieve the ARP from the IMS call control signal carrier to the ARP that is originally configured, and notifies this to the call control node P -CSCF (step S2033).
    [0094] By means of the decision flowchart indicated above, when it is determined that the ARP retrieval processing of the IMS call control signal bearer is requested, the ARP retrieval processing is performed in steps S204 to S215 shown in Figure 12 To be more specific, the PCRF priority control node sends the "Provision of Guidelines and Loading Rules", which includes the carrier ID of the IMS call control signal carrier and the ARP that is originally configured on the carrier of IMS call control signal, to the P-GW communication port (step S204). Here, "Provision of Guidelines and Loading Rules" works as a priority retrieval request signal to request change of ARP from the IMS call control signal carrier to the ARP that is originally configured, and includes the carrier ID to identify the IMS call control signal bearer and the ARP (eg 11 (low priority)) that is originally configured on the IMS call control signal bearer.
    [0095] Upon receiving the "Provision of Guidelines and Loading Rules", the communication port P-GW sends the "Refresh Carrier Request (carrier modification request signal)", which includes the carrier ID and ARP included in the "Provision of Guidelines and Loading Rules" for the S-GW communication port (step S205). The S-GW communication port transfers the "Refresh Carrier Request" received from the P-GW communication port to the MME mobility management node (step S206).
    [0096] Since the UE mobile terminal is in a connected state on releasing a priority call, when the MME mobility management node receives the "Refresh Carrier Request" from the S-GW communication port, the MME mobility management node MME mobility management sends "Carrier Modification Request/Session Management Request" to eNode B radio base station (step S207).
    [0097] The eNode B radio base station sends the "RRC Connection Reconfiguration", which requests reconfiguration of an RRC connection, to the UE mobile terminal (step S208), and sends the "RRC Connection Reconfiguration Completion", which reconfigures an RRC connection, to the radio base station eNode B (step S209), and the radio base station eNode B sends the "Carrier Modification Response" to the MME mobility management node (step S210 ).
    [0098] The UE mobile terminal sends the "Direct Handoff" to the radio base station eNode B (step S211), and the radio base station eNode B sends the "Session Management Response" to the mobility management node MME (step S212).
    [0099] The MME mobility management node sends the "Update Carrier Response" to the S-GW communication port (step S213), and the S-GW communication port transfers the "Update Carrier Response" to the S-GW communication port (step S214).
    [00100] Upon receiving "Refresh Carrier Request" from the S-GW communication port, the P-GW communication port sends the "Confirmation", which notifies that the ARP of the IMS call control signal carrier has been retrieved for the ARP that is originally configured, for priority control node PCRF (step S215).
    [00101] The PCRF priority control node sends the "carrier recovery completion notification", which notifies that the ARP of the IMS call control signal carrier has been updated to the ARP that is originally configured, to the node P-CSCF call control (step S216). Operation • Effect
    [00102] In the mobile communication system according to the first embodiment of the present invention, when an invitation signal including priority call information is received by a call control node P-CSCF, the ARP value of a signal carrier The IMS call control to send the invitation signal to a mobile terminal is changed to indicate a high priority.
    [00103] Consequently, it is preferably possible to perform procedure to establish an IMS call control signal bearer for a priority call (i.e., a paging procedure related to a priority call, an RRC connection establishment procedure between a mobile terminal UE and a radio base station eNode B, a radio access bearer establishment procedure between the mobile terminal UE and the communication port S-GW, a procedure of establishing GTP tunnel or GRE tunnel between the S-GW communication port and P-GW communication port and so on) and transfer an invitation signal to a priority call preferably.
    [00104] Also, it is possible to prevent resources from being allocated to an IMS call control signal bearer for a normal call preferentially and to prevent an IMS call control signal bearer for a priority call from being disconnected.
    [00105] Also, since it is possible to retrieve the ARP of an IMS call control signal bearer upon releasing a priority call to the ARP that is originally configured, it is possible to prevent resources from being preferentially allocated to that signal bearer IMS call control after releasing the priority call. Second Mode
    [00106] In the following, with respect to the mobile communication system according to a second modality, differences in relation to the first modality will be mainly described. A case with the second mode will be described where, instead of GTP, PMIPv6 is used as the signal protocol between the P-GW communication port and the S-GW communication port.Mobile Communication System Operations(2-1 ) Priority Call Reception Operations
    [00107] Now, the operation of the mobile communication system according to the second mode upon reception of a priority call will be described with reference to figures 14 to 15. Figures 14 and 15 are a schematic diagram and a sequence diagram illustrating the operations of the mobile communication system according to the second mode upon receipt of a priority call. It should be noted that the same codes in figures 14 and 15 designate the same steps. It should be noted that the operations of steps S301 to S304 in figures 14 and 15 are the same operations as steps S101 to S104 in figures 8 and 9.
    [00108] In the case where processing of changing the ARP of the IMS call control signal bearer is determined to be requested, the priority control node PCRF sends the "Provision of Control Rules and Communication Port QoS" to the S-GW communication port (step S305). Here, the "Communication Port QoS and Control Rules Provision" acts as the first priority change request signal to request ARP change from the IMS call control signal bearer to a priority call ARP, and includes the bearer ID to identify the IMS call control signal bearer and the priority call ARP.
    [00109] The S-GW communication port sends the "Carrier Update Request (carrier update request signal)", which includes the carrier ID and priority call ARP included in the "Provision of Control Rules and Comm Port QoS", for the MME mobility management node (step S306). The operations of steps S307 to S318 in figures 14 and 15 are the same operations as in steps S108 to S119 in figures 8 and 9.
    [00110] Upon receiving the "Refresh Carrier Request" from the MME mobility management node, the S-GW communication port sends the "Acknowledgement", which indicates that the ARP of the IMS call control signal carrier has been changed to a priority call ARP for priority control node PCRF (step S319).
    [00111] In response to receiving the "Acknowledgment" in step S319, the PCRF priority control node sends the "Provision of Guidelines and Loading Rules" to the communication port P-GW. Here, the "Provision of Guidelines and Loading Rules" functions as a second priority change request signal to request change of the ARP from the IMS call control signal bearer to a priority call ARP, and includes the bearer ID to identify the IMS call control signal bearer and the priority call ARP. After ARP change processing has finished, the communication port P-GW sends "Acknowledgment" to indicate that ARP change processing has finished, to priority control node PCRF (step S320).
    [00112] Priority control node PCRF sends "carrier update completion notification", which notifies that IMS call control signal carrier ARP change is complete, to call control node P- CSCF (step S321). In response to this notification of completion of the IMS call control bearer update procedure, the call control node P-CSCF transfers an invite signal including priority call information, to the communication port P-GW. Using the changed IMS call control signal carrier, the communication port P-GW sends the invitation signal which includes call priority information, to the mobile terminal UE, through the communication port S-GW and the base station eNode B (step S322) (2-2) Operations on Priority Call Release
    [00113] The operations of the mobile communication system according to the second mode in releasing a priority call will now be described with reference to figure 16. Figure 16 is a sequence diagram illustrating operations in releasing a priority call from according to the second modality. It should be noted that the operations of steps S401 to S403 in figure 16 are the same operations as steps S201 to S203 in figure 12.
    [00114] In the case where the process of retrieving the ARP from the IMS call control signal bearer is determined to be requested, the priority control node PCRF sends the "Provision of Control Rules and Communication Port QoS" to the S-GW communication port (step S404). Here, "Provision of Communication Port QoS and Control Rules" acts as the first priority recovery request signal to request ARP recovery from the IMS call control signal carrier to the ARP that is originally configured, and includes the bearer ID to identify the IMS call control signal bearer and the ARP that is originally configured on that IMS call control signal bearer (e.g. 11 (low priority)).
    [00115] The S-GW communication port sends the "Carrier Update Request (carrier update request signal)", which includes the carrier ID and ARP included in the "Provision of Control Rules and Port QoS Communication" to the MME mobility management node (step S405). The operations of steps S406 to S412 in figures 14 and 15 are the same operations as in steps S207 to S213 in figures 12 and 13.
    [00116] The S-GW communication port sends "Acknowledgment", which notifies that the ARP of the IMS call control signal carrier has been retrieved for the ARP that is originally configured, to the priority control node PCRF ( step S413).
    [00117] In response to receiving "Acknowledgment" in step S413, the priority control node PCRF sends "Provision of Guidelines and Loading Rules" to the communication port P-GW. Here, the "Communication Port QoS and Control Rules Provision" acts as a second priority recovery request signal to request ARP recovery from the IMS call control signal carrier to the ARP that is originally configured, and includes the bearer ID to identify the IMS call control signal bearer and the ARP that is originally configured on that IMS call control signal bearer. After ARP retrieval processing has been performed, the communication port P-GW sends "Acknowledgment" to indicate that ARP retrieval processing has been performed, to priority control node PCRF (step S414).
    [00118] The PCRF priority control node sends the "carrier recovery completion notification", which notifies that the ARP of the IMS call control signal carrier has been recovered for the ARP that is originally configured, to the node P-CSCF call control (step S415). Operation • Effect
    [00119] In the mobile communication system according to the second modality of the present invention, even in the case where PMIPv6 is used, it is possible to preferably perform a procedure to establish an IMS call control signal carrier for a priority call ( that is, a paging procedure related to a priority call, an RRC connection establishment procedure between a mobile terminal UE and a radio base station eNode B, a radio access bearer establishment procedure between the mobile terminal UE and the S-GW communication port, a GTP tunnel establishment procedure or GRE tunnel between the S-GW communication port and the P-GW communication port and so on) and transfer an invitation signal to a priority call preferably .
    [00120] Also, even in the case where PMIPv6 is used, it is possible to retrieve the ARP of an IMS call control signal carrier on releasing a priority call to the ARP that is originally configured, and therefore it is possible to prevent that resources are preferentially allocated to this IMS call control signal bearer after the priority call is released. Other Modalities
    [00121] Now, although the present invention has been described in detail with reference to the embodiments indicated above, it should be obvious to those skilled in the art that the present invention is hereby not limited to the embodiments described in this specification. The present invention can be implemented with various corrections and with various modifications, without departing from the spirit and scope of the present invention defined by the recitations of the claims. Accordingly, the descriptions in this descriptive report are provided solely for the purpose of explaining examples, and should not be construed herewith as limiting the present invention in any way.
    [00122] The disclosure of Japanese Patent Application No. 2010001452, filed January 6, 2010, including the descriptive report, drawings and abstract is incorporated herein by reference in its entirety.
    权利要求:
    Claims (13)
    [0001]
    1. Mobile communication method characterized in that it comprises the steps of: at a call control node, upon receiving (S101) a call connection request signal which is an INVITE signal corresponding to a priority call, notifying (S103) a reception of the call connection request signal including priority call information, to a priority control node; at the priority control node, in response to a notification of reception of the call connection request signal from the call control node, determine (S104) whether it is requested to change a priority of a call control signal carrier to send the call connection request signal from a first communication port connected to the call control node to a mobile terminal, to a priority higher than a priority set on the call control signal bearer; changing (S105) the priority of the call control signal bearer to the priority greater than the priority set on the call control signal bearer when it is requested to change the priority of the call control signal bearer; and perform (S109) a paging to the mobile terminal according to the changed priority of the call control signal bearer, where the call control node is a Proxy Call Session Control Function (P-CSCF) at one end end that receives the INVITE signal as the call connection request signal transferred from an originating end, where in the paging execution step, when the priority of the call control signal carrier is changed to the priority higher than the established priority on the call control signal bearer, a mobility management node sends a paging signal including a priority indication to a base radio station so that the base radio station performs a prioritized paging to the mobile terminal in accordance with the priority is changed, and wherein the call control signal bearer is a dedicated call control signal bearer, configure between the first communication port. It is not for the mobile terminal to send the INVITE signal received by the Proxy Call Session Control Function from the first communication port to the mobile terminal.
    [0002]
    2. Mobile communication method according to claim 1, characterized in that: the step of changing (S105) the priority of the call control signal carrier includes: at the priority control node, send (S106) a priority change request signal including the priority greater than the priority set on the call control signal carrier, for the first communication port; and at the first communication port, sending (S107) a carrier update request signal including the priority that is included in the priority change request signal, to a mobility management node via a second communication port.
    [0003]
    3. Method of mobile communication according to claim 1, characterized in that: the step of changing (S105) the priority of the call control signal carrier includes: at the priority control node, sending a first signal of priority change request including the priority greater than the priority set on the call control signal carrier, to a second communication port connected to the first communication port; on the second communication port, sending an update request signal. carrier including the priority that is included in the first priority change request signal, for a mobility management node; and at the priority control node, when it is notified from the second communication port that the priority of the call control signal bearer has been changed, send a second priority change request signal including the priority greater than the priority established on the call control signal carrier, to the first communication port.
    [0004]
    4. Method of mobile communication according to claim 1, characterized in that it further comprises the steps of: at the call control node, notifying a release of the priority call that has been initiated by the call connection request signal to the priority control node; at the priority control node, in response to a priority call release notification from the call control node, determine whether it is requested to retrieve the priority of the call control signal bearer for the priority originally established on the call control signal carrier; and retrieve the priority of the call control signal bearer to the priority originally established on the call control signal bearer when it is requested to retrieve the priority of the call control signal bearer.
    [0005]
    5. Mobile communication method according to claim 4, characterized in that the step of recovering the priority of the call control signal carrier includes: at the priority control node, sending a call recovery request signal. priority including the priority originally established on the call control signal carrier, for a first communication port; and at the first communication port, sending a carrier update request signal including the priority included in the priority recovery request signal, to a mobility management node, via a second communication port; and at the mobility management node, reconfigure a connection between the mobile terminal and the base station, based on the priority included in the carrier update request signal.
    [0006]
    6. Method of mobile communication according to claim 4, characterized in that the step of recovering the priority of the call control signal carrier includes: at the priority control node, sending a first recovery request signal of priority including the priority originally established on the call control signal carrier, to a second communication port connected to the first communication port; on the second communication port, sending the carrier update request signal including the priority that is included at the first priority recovery request signal, to a mobility management node; and at the mobility management node, reconfigure a connection between the mobile terminal and the base station based on the priority included in the carrier update request signal; and at the priority control node, when it is notified from the second communication port that the priority of the call control signal bearer has been recovered, send a second priority recovery request signal including the priority originally set in the call control signal carrier, to the first communication port.
    [0007]
    7. Priority control node characterized in that it is configured when it is notified (S103) from the call control node that a call connection request signal including priority call information, which is a call signal. INVITATION corresponding to a priority call was received, to determine (S104) whether it is requested to change a priority of a call control signal carrier to send the call connection request signal of a first communication port connected to the call control node to a mobile terminal, to a priority higher than a priority set on the call control signal bearer; and when notified (S103) of a release of the priority call that was initiated by the call connection request signal from the call control node, determine (S203) whether it is requested to retrieve the priority of the call control signal carrier to the priority originally established on the call control signal bearer, where the call control node is a Proxy Call Session Control Function (P-CSCF) at a far end that receives the INVITE signal as the call signal. call connection request transferred from an originating end, wherein when the priority of the call control signal carrier is changed to a priority higher than the priority established on the call control signal carrier, a paging signal including an indication of priority is sent from a mobility management node to a base station so that the base station performs prioritized paging for the term. mobile signal according to the changed priority, and wherein the call control signal carrier is a dedicated call control signal carrier configured between the first communication port and the mobile terminal, to send the INVITE signal received by the Proxy Call Session Control function, from the first communication port to the mobile terminal.
    [0008]
    8. Priority control node, according to claim 7, characterized in that the priority control node is configured to send a priority change request signal including the priority higher than the priority established on the signal carrier control signal, to the first communication port, when it is requested to change the priority of the call control signal carrier.
    [0009]
    9. Priority control node, according to claim 7, characterized in that the priority control node is configured to send a first priority change request signal including the priority higher than the priority established in the call control signal, to a second communication port connected to the first communication port, when requested to change the priority of the call control signal carrier; and send a second priority change request signal including the priority greater than the priority set on the call control signal carrier, to the first communication port, when it is notified from the second communication port that the priority of the carrier of call control signal has been changed.
    [0010]
    10. Priority control node, according to claim 7, characterized in that the priority control node is configured to send a priority recovery request signal including the priority originally established in the control signal carrier. call, to the first communication port when it is requested to retrieve the priority of the call control signal carrier.
    [0011]
    11. Priority control node, according to claim 7, characterized in that the priority control node is configured to: send a first priority recovery request signal including the priority originally established in the signal carrier. call control, to a second communication port connected to the first communication port, when it is requested to retrieve the priority of the call control signal carrier; and sends a second priority recovery request signal including the priority originally established on the call control signal bearer, to the first communication port, when it is notified from the second communication port that the priority of the call control signal bearer. call control was regained.
    [0012]
    12. Mobility management node characterized by the fact that it is configured, when receiving a priority call in a call control node, when a priority of a call control signal carrier to send a call connection request signal which is an INVITE signal corresponding to a priority call, from a first communication port connected to a call control node to a mobile terminal is changed to a priority higher than a priority established on the call control signal carrier , to send (S109) a paging signal including a priority indication to a radio base station belonging to the mobility management node, so that a prioritized paging to the mobile terminal is performed according to the changed priority, wherein the node call control is a Proxy Call Session Control Function (P-CSCF) at one end that receives the INVITE signal as the signal of call connection request transferred from a originating end, the call control signal carrier is a dedicated call control signal carrier, set up between the first communication port and the mobile terminal to send the received INVITE signal by the Proxy Call Session Control Function, from the first communication port to the mobile terminal, at the call control node, upon receiving the call connection request signal which is the INVITE signal corresponding to the priority call, notify the reception of the call connection request signal including priority call information, to a priority control node, at the priority control node, in response to a notification of receiving the call connection request signal from the control node. call, it is determined whether it is requested to change a priority of the call control signal bearer to send the call connection request signal from the first communication port connected to the call control node to the mobile terminal, to a priority higher than the priority set on the call control signal bearer, when it is requested to change the priority of the call sign bearer, the priority of the call control signal carrier is changed to the greater than the priority set on the call control signal carrier, and a paging to the mobile terminal is electronically performed according to the changed priority of the call control signal carrier.
    [0013]
    13. Mobility management node according to claim 12, characterized in that the mobility management node is configured to receive (S107) a carrier update request signal including the changed priority of the carrier signal. call control, and send a paging signal including a priority indication to the base station belonging to the mobility management node, so that a paging to the mobile terminal is performed according to the changed priority included in the request signal update carrier.
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-01-14| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 76/02 , H04W 28/24 Ipc: H04L 29/06 (1990.01), H04W 76/50 (2018.01) |
    2020-01-14| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-03| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 14/12/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2010001452A|JP4742171B2|2010-01-06|2010-01-06|Mobile communication method, call control node, priority control node, and mobility management node|
    JP2010-001452|2010-01-06|
    PCT/JP2010/072496|WO2011083662A1|2010-01-06|2010-12-14|Mobile communication method, call control node, priority control node, and mobile management node|
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