JP5169366B2 - Location registration control method for mobile communication system - Google Patents

Description

  The present invention relates to a control method for registering a location of a mobile terminal in a mobile communication system, and more particularly, to move to update location registration information of a mobile terminal when the location of the mobile terminal is changed. The present invention relates to a location registration control method for controlling information transmitted from a terminal.

  The “3rd Generation Partnership Project (3GPP) Standardization Project” (3GPP), which includes specifications for digital mobile phone systems and the like, regulates location registration control of mobile terminals (eg, non-patented). Reference 1, 6.9 Location Management Function).

  FIG. 3 is a configuration diagram (1) showing the mobile communication system. The mobile communication system 1 shown in the figure includes a mobile station (MS) 11 and a radio network controller (RNC) that controls base station devices (BTS: Base Transceiver Stations) 21, 22, and 23 in a control area RA1. Network Controller) 31, RNC 32 that controls BTSs 24, 25, and 26 in control area RA2, Serving GPRS Support Nodes (SGSN) 41 and 42 for performing packet communication by GPRS (General Packet Radio Service) system , A gateway GPRS support node (GGSN) 51 and a home location device (HLR) 61 for performing packet communication by the GPRS method are provided.

  The RNC 30 (hereinafter referred to as RNC 30 when collectively referred to as RNC) controls the communication path of the MS 11 that communicates with the BTS 20 (hereinafter referred to as BTS 20 when collectively referred to as BTS).

  When the MS 11 moves from the subordinate of the BTS 23 in the control area RA1 of the RNC 31 to the subordinate of the BTS 24 in the control area RA2 of the RNC 32, the communication line of the MS 11 passes from the BTS 23-RNC 31-SGSN 41-GGSN 51 which is the communication path via the RNC 31. The communication path is BTS24-RNC32-RNC31-SGSN41-GGSN51.

  FIG. 4 is a configuration diagram (2) showing the mobile communication system. The mobile communication system 2 in this figure has the same device configuration as the mobile communication system 1 in FIG.

  Since the communication line of FIG. 3 becomes a communication path via the RNC 31 and becomes a redundant communication path, the serving RNC is switched from the RNC 31 to the RNC 32 between the RNC 31 and the RNC 32 as shown in FIG. That is, the communication line of the MS 11 is switched to BTS24-RNC32-SGSN42-GGSN51 which is a communication path.

  FIG. 5 is a sequence diagram for explaining the relocation procedure (for example, see Non-Patent Document 1, FIG. 39). The relocation described here is that the RNC 32 hands over the function of the RNC 31 when the MS 11 moves from the control area RA1 of the RNC 31 to the control area RA2 of the RNC 32, as shown in FIG.

  S11: The MS 11 notifies the RNC 31 that the strength of radio waves received by the MS 11 has changed due to movement.

  S12: The RNC 31 that has received the notification of the change in the strength of the received radio wave from the MS 11 transmits an area switching request (relocation required) to the SGSN 41.

  S13: The SGSN 41 that has received the area switching request from the RNC 31 transfers this area switching request (relocation request) to the SGSN 42 that is the switching destination.

  S14: The switching destination SGSN 42 that has received the transfer of the area switching request from the switching source SGSN 41 transmits an area switching request (relocation request) to the switching destination RNC 32.

  S15: The switching destination RNC 32 that has received the area switching request from the switching destination SGSN 42 responds to the switching destination SGSN 42 with an ACK (relocation request acknowledge) indicating that the area switching request has been received.

  S16: Upon receiving the ACK response of the area switching request from the switching destination RNC 32, the switching destination SGSN 42 transfers the area switching response (relocation request response) to the switching source SGSN 41.

  S17: The switching source SGSN 41 that has received the area switching response from the switching destination SGSN 42 transmits an area switching command (relocation command) to the switching source RNC 31.

  S18: The switching source RNC 31 that has received the area switching command from the switching source SGSN 41 transmits the terminal information of the MS 11 to the switching destination RNC 32.

  S19: The switching source RNC 31 that has received the area switching command from the switching source SGSN 41 transmits the terminal information of the MS 11 to the switching destination RNC 32 and transmits an area switching commit (relocation commit) to the switching destination RNC 32.

  S20: The switching destination RNC 32 that has received the area switching commit from the switching source RNC 31 transmits an area switching detection message (relocation detect) to the switching destination SGSN 42.

  S21: The switching destination RNC 32 that has received the area switching commit from the switching source RNC 31 transmits RAN (radio access network) mobility information (RAN mobility information) to the MS 11.

  S22: Upon receiving the RAN mobility information from the switching destination RNC 32, the MS 11 returns a confirmation signal (RAN mobility information confirm) to the switching destination RNC 32.

  S23: Upon receiving the RAN mobility information confirm from the MS 11, the switching destination RNC 32 transmits area switching completion (relocation complete) to the switching destination SGSN 42.

  S24: The switching destination SGSN 42 that has received the area switching completion from the switching destination RNC 32 transfers the area switching completion to the switching source SGSN 41.

  S25: The switching source SGSN 41 that has received the area switching completion transfer from the switching destination SGSN 42 responds to the switching destination SGSN 42 with an ACK (forward relocation complete acknowledge) of the area switching completion.

  S26: The switching destination SGSN 42 that has received the ACK response of the area switching completion from the switching source SGSN 41 transmits a location registration update request (update PDP (packet data protocol) context request) to the GGSN 51.

  S27: The GGSN 51 that has received the location registration update request from the SGSN 42 at the switching destination returns a response (update PDP context response) to the SGSN 51 at the switching destination.

  S28: The switching source SGSN 41 that has received the area switching completion transfer from the switching destination SGSN 42 transmits an interface release command (Iu release command) between the mobile terminal and the RNC 30 to the switching source RNC 31.

  S29: The switching source RNC 31 that has received the interface release command from the switching source SGSN 41 returns an interface release completion (Iu release complete) response to the switching source SGSN 41.

  FIG. 6 is a sequence diagram for explaining the location registration update procedure (for example, see Non-Patent Document 1 and FIG. 33). The location registration update described here means that the mobile terminal (MS) 11 moves during communication and performs location registration after the end of communication, the location registration when the MS 11 moves in a standby state and the location changes, is periodically To register the location.

  S31: The MS 11 transmits a location registration update request (routing area update request) to the switching destination SGSN 42.

  S32: The SGSN 42 of the switching destination that has received the location registration update request from the MS 11 transmits an SGSN context information request (SGSN context request) to the SGSN 41 of the switching source.

  S33: The switching source SGSN 41 that has received the SGSN state information request from the switching destination SGSN 42 returns an SGSN state information response (SGSN context response) to the switching destination SGSN 42.

  S34: The SGSN 42 of the switching destination that has received the SGSN status information response from the SGSN 41 of the switching source performs security functions such as checking the mobile terminals that are registered as MS11 and HLR 61, setting procedures for preventing data tampering and wiretapping ( security functions).

  S35: The SGSN state information ACK (SGSN context acknowledge) is sent to the SGSN 42 that has received the SGSN state information response from the SGSN 41 that is the switching source and has set the security function to notify that it is ready to receive the data packet. ) To the switching source SGSN 41.

  S36: The SGSN 41 that has received the SGSN state information ACK from the SGSN 42 that is the switching destination transfers the buffered packet to the SGSN 42 that is the switching destination.

  S37: The switching destination SGSN 42 to which the packet has been transferred from the switching source SGSN 41 transmits a location registration update request (update PDP context request) to the GGSN 51.

  S38: The GGSN 51 that has received the location registration update request from the switching destination SGSN 42 returns a location registration update response (update PDP context response) to the switching destination SGSN 42.

  S39: The SGSN 42 that has received the location registration update response from the GGSN 51 transmits location registration information (update location) to the HLR 61 for SGSN switching.

  S40: The HLR 61 that has received the location registration information from the switching destination SGSN 42 transmits a location registration deletion (cancel location) to the switching source SGSN 41.

  S41: The SGSN 41 that has received the location registration deletion from the HLR 61 responds to the HLR 61 with a location registration deletion ACK (cancel location ACK).

  S42: The HLR 61 that has received the ACK for deletion of location registration from the SGSN 41 at the switching source transmits subscriber information (insert subscriber data) to the SGSN 42 at the switching destination.

  S43: The SGSN 42 that has received the subscriber information from the HLR 61 responds to the HLR 61 with an ACK (insert subscriber data ACK) for obtaining the subscriber information.

  S44: The HLR 61 that has received the ACK for the subscriber information acquisition from the SGSN 42 at the switching destination has completed the switching of the SGSN 40 received in S39 (hereinafter, SGSN 40 will be collectively referred to as SGSN) (update location ACK) ) To the SGSN 42 of the switching destination.

  S45: The switching destination SGSN 42 that has received the completion of the switching of the SGSN 40 from the HLR 61 notifies the MS 11 that the MS 11 has become effective in the destination control area (routing area update accept).

S <b> 46: The MS 11 that has received notification from the switching destination SGSN 42 that it has become effective in the control area of the movement destination responds Routing Area Update Complete.
3GPP TS23.060 V7.4.0 (3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; General Packet Radio Service (GPRS); Service description; Stage2 (Release7))

  As described above, the location registration is updated when the mobile terminal (MS11) moves to a different control area of the radio network controller (RNC30). However, as described in S31 of FIG. 6, the MS 11 is to transmit a location registration update request (routing area update request) to the serving GPRS support node (SGSN 42) of the switching destination after the communication is completed.

  That is, when the MS 11 moves to a different control area of the RNC 30, as described with reference to FIG. 5, location registration update processing is executed with S 11 as a trigger, and information for location registration update is transferred to the network system ( In spite of being notified to the switching destination SGSN 42), it is wasted radio resources to transmit the location registration update request shown in S31 of FIG. 6 to the switching destination SGSN 42 again from the MS 11 after the end of communication.

  Therefore, when the mobile terminal (MS11) moves to a different control area of the radio network controller (RNC30), based on the information notified to the network system, the location registration update request from the mobile terminal after the end of communication An object of the present invention is to provide a location registration control method for updating location registration without performing the above.

In the location registration control method of a mobile communication system, a second RNC that uses a location that has been moved from the first radio network controller (RNC) that has a location that is located before the movement of the mobile terminal as a control area. Whether the location registration update processing has been performed in the system after the movement in the information notified by the second RNC to the mobile terminal when the information of the mobile terminal that has moved the area is transferred to There is provided a location registration control method for a mobile communication system, comprising a step of transmitting information to be indicated .

  According to this location registration control method, the mobile terminal can be provided with information for stopping a request to update location registration. Therefore, the mobile terminal that has moved the control area during communication updates the location registration after the communication ends. It is possible to provide a location registration control method capable of stopping a request to be made.

  In a location registration control method of a mobile communication system, a mobile terminal that can be provided with information for stopping a request to update location registration updates location registration after the end of communication when the control area is moved during communication. While stopping the request, the communication path can be switched to the destination radio network controller (RNC) and the subscriber packet switch (SGSN), and the location registration update process can be performed autonomously. Since it is not necessary to make a location registration update request after the end, it is possible to reduce radio resources transmitted by the mobile terminal.

Hereinafter, the details of the present invention will be described with reference to the drawings. In addition, the same code | symbol is described about the same thing or a similar thing in drawing.
Example 1
FIG. 1 is a sequence diagram for explaining a relocation procedure in one embodiment of the present invention. Description will be made based on the same system configuration as that described in FIG.

  FIG. 2 is a diagram for explaining UTRAN Mobility information according to an embodiment of the present invention.

  First, FIG. 2 will be described. UTRAN (universal mobile telecommunication system) radio access network (UTRAN) mobility information (UTRAN mobility information) shown in this figure is information for the RNC 30 to control the MS 11 for radio resource control.

  Integrity check info (I11) is information for decoding encoded data in order to prevent falsification of the data.

  The RRC transaction identifier (I12) is information for identifying a radio resource control transaction (RRC (radio resource control) transaction).

  Integrity protection mode info (I13) is the same information as (I11).

  Ciphering mode info (I14) is information for scrambling to prevent eavesdropping.

  New U-RNTI (UTRAN radio network temporary identity) (I15) is a code for identifying a connection between a mobile terminal and UTRAN.

  New C-RNTI (cell radio network temporary identity) (I16) is cell information.

  UE (user equipment) Timers and constants in connected mode (I17) are various timer values.

  CN (core network) Information info (I18) is information related to a core network of a connection destination exchange or the like.

  URA (UTRAN registration area) identity (I19) is position information.

  RB (roaming broker) with PDCP (packet data convergence protocol) information (I20) is an identifier for connecting signals used at the time of relocation.

  PDCP context relocation info (I21) is relocation procedure standard information.

  RA update indication (I22) is information for notifying the mobile terminal that the location registration update process is performed on the network side and that notification for updating the location registration from the mobile terminal to the network side is unnecessary. It is. For example, if the location registration update processing has been performed on the network side, the logical level “1” is notified to the mobile terminal, and if not, the logical level “0” is notified to the mobile terminal.

  The relocation procedure in FIG. 1 will be described. S111 to S120 are the same as S11 to S20 in FIG.

  S111: The MS 11 notifies the RNC 31 that the strength of radio waves received by the MS 11 has changed due to movement.

  S112: The RNC 31 that has received the change notification of the strength of the received radio wave from the MS 11 transmits an area switching request (relocation required) to the SGSN 41.

  S113: The SGSN 41 that has received the area switching request from the RNC 31 transfers this area switching request (relocation request) to the SGSN 42 that is the switching destination.

  S114: The SGSN 42 that has received the transfer of the area switching request from the SGSN 41 that is the switching source transmits an area switching request (relocation request) to the RNC 32 that is the switching destination.

  S115: The switching destination RNC 32 that has received the area switching request from the switching destination SGSN 42 responds to the switching destination SGSN 42 with an ACK (relocation request acknowledge) indicating that the area switching request has been received.

  S116: Upon receiving the ACK response of the area switching request from the switching destination RNC 32, the switching destination SGSN 42 transfers the area switching response (relocation request response) to the switching source SGSN 41.

  S117: The switching source SGSN 41 that has received the area switching response from the switching destination SGSN 42 transmits an area switching command (relocation command) to the switching source RNC 31.

  S118: The switching source RNC 31 that has received the area switching command from the switching source SGSN 41 transmits the terminal information of the MS 11 to the switching destination RNC 32.

  S119: The switching source RNC 31 that has received the area switching command from the switching source SGSN 41 transmits the terminal information of the MS 11 to the switching destination RNC 32, and transmits an area switching commit (relocation commit) to the switching destination RNC 32.

  S120: The switching destination RNC 32 that has received the area switching commit from the switching source RNC 31 transmits an area switching detection message (relocation detect) to the switching destination SGSN 42.

  S121: Since the switching destination RNC 32 that has received the area switching commit from the switching source RNC 31 is performing the location registration update process, the RA update indication (I22) of the UTRAN Mobility information described in FIG. The UTRAN Mobility information is transmitted to the MS 11 as a logical level “1” indicating that the location registration update process has been performed.

  S122: Upon receiving the UTRAN Mobility information from the switching destination RNC 32, the MS 11 returns a confirmation signal (UTRAN mobility information confirm) to the switching RNC 32. If the RA update indication (I22) of the received UTRAN Mobility information is the logical level “1” (unnecessary in the figure), the MS 11 does not make a location registration update request after the end of communication, and the logical level “0”. If “(if necessary in the figure)”, a request for updating location registration is made after the end of communication (the process of A in the figure, that is, the process of FIG. 6 is carried out).

  The RA update indication (I22) logic level of the received UTRAN Mobility information is held in a data storage unit (not shown) of the MS 11. The RA update indication (I22) data held at the logical level “1” is reset after the mobile communication of the MS 11 is completed.

  S123: Upon receiving the UTRAN mobility information confirm from the MS 11, the switching destination RNC 32 transmits an area switching completion (relocation complete) to the switching destination SGSN 42.

  S124: The switching destination SGSN 42 that has received the area switching completion from the switching destination RNC 32 transfers the area switching completion to the switching source SGSN 41.

  S125: The switching source SGSN 41 that has received the area switching completion transfer from the switching destination SGSN 42 responds to the switching destination SGSN 42 with an ACK (forward relocation complete acknowledge) of the area switching completion.

  S126: The switching destination SGSN 42 that has received the ACK response of the area switching completion from the switching source SGSN 41 transmits a location registration update request (update PDP (packet data protocol) context request) to the GGSN 51.

  S127: The GGSN 51 that has received the location registration update request from the SGSN 42 at the switching destination returns a response (update PDP context response) to the SGSN 51 at the switching destination.

  S128: The switching source SGSN 41 that has received the area switching completion transfer from the switching destination SGSN 42 transmits an interface release command (Iu release command) between the mobile terminal and the RNC 30 to the switching source RNC 31.

  S129: The switching source RNC 31 that has received the interface release command from the switching source SGSN 41 returns an interface release completion (Iu release complete) response to the switching source SGSN 41.

  S130: The SGSN 42 of the switching destination that has received the location registration update response from the GGSN 51 determines whether or not location registration needs to be updated depending on whether the MS 11 has moved through the control area during communication. If the control area has not been moved and the location registration update is not required (B in the figure), the relocation procedure ends. When the location registration needs to be updated by moving the control area, the SGSN 42 transmits location registration information (update location) to the HLR 61 for SGSN switching.

  S131: Upon receiving the location registration information from the switching destination SGSN 42, the HLR 61 transmits a location registration deletion (cancel location) to the switching source SGSN 41.

  S132: The switching source SGSN 41 that has received the location registration deletion from the HLR 61 responds to the HLR 61 with a location registration deletion ACK (cancel location ACK).

  S133: The HLR 61 that has received the ACK for deleting location registration from the SGSN 41 that is the switching source transmits subscriber information (insert subscriber data) to the SGSN 42 that is the switching destination.

  S134: The SGSN 42 that has received the subscriber information from the HLR 61 responds to the HLR 61 with an ACK (insert subscriber data ACK) for obtaining the subscriber information.

  S135: The HLR 61 that received the ACK for the subscriber information acquisition from the SGSN 42 at the switching destination has completed the switching of the SGSN 40 received at S39 (hereinafter referred to as SGSN 40 when generically referred to as SGSN) (update location ACK). ) To the SGSN 42 of the switching destination.

  S136: The switching destination SGSN 42 that has received the completion of switching of the SGSN 40 from the HLR 61 notifies the MS 11 that the MS 11 has become effective in the control area of the movement destination (routing area update accept).

  S137: The MS 11 that has received notification from the switching destination SGSN 42 that it has become effective in the destination control area responds with Routing Area Update Complete.

  According to the present embodiment, a mobile terminal that can be provided with information for stopping a request for updating location registration stops a request for updating location registration after the end of communication when moving in a control area during communication. And a location registration control method capable of autonomously performing location registration update processing by switching the communication path to a destination radio network controller (RNC) and a subscriber packet switch (SGSN). It becomes possible.

It is a sequence diagram for demonstrating the relocation procedure in one Example. It is a figure for demonstrating the UTRAN Mobility information in one Example. FIG. 2 is a diagram (1) for explaining the mobile communication system. FIG. 2 is a diagram (2) for explaining the mobile communication system. It is a sequence diagram for demonstrating a relocation procedure. It is a sequence diagram for demonstrating a location registration update procedure.

Explanation of symbols

1, 2 Mobile communication system 11 Mobile terminal (MS)
20, 21, 22, 23, 24, 25, 26 Base station equipment (BTS: Base Transceiver Station)
30, 31, 32 Radio Network Controller (RNC)
40, 41, 42 Serving GPRS Support Node (SGSN)
51 Gateway GPRS Support Node (GGSN)
61 Home Location Register (HLR)
RA1, RA2 control area

Claims (3)

The mobile terminal that has moved the area from the first radio network controller (RNC) having the location before the movement of the mobile terminal as the control area to the second RNC having the location after the movement as the control area A step of transmitting information indicating whether or not location registration update processing has been performed in the system after movement in the information notified by the second RNC to the mobile terminal when the information of A location registration control method for a mobile communication system. The location registration control method according to claim 1, further comprising:
When the area is moved during communication of the mobile terminal, if the location registration update process has been performed in the system after movement, the mobile terminal performs second wireless network control after the end of the communication. A location registration control method for a mobile communication system, comprising a step of suppressing notification of a request signal for updating location registration to a device (RNC). The location registration control method according to claim 2, further comprising:
After the second radio network controller (RNC) having the location in the moved area as the control area notifies the second subscriber packet switch (SGSN) that manages the second RNC of the completion of area switching. The second SGSN notifying the home location device (HLR) of the location registration information, and the mobile terminal registered in the first SGSN under the control of the first RNC is sent to the second SGSN A location registration control method for a mobile communication system, characterized by being registered.

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