JP2011041235A - Mobile communication method, radio base station, and gateway apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To conduct "Accessibility Check" on a mobile station UE even in the case where a gateway apparatus is provided that accommodates multiple radio base stations. <P>SOLUTION: A mobile communication method includes processes of: allowing an exchange station MME to obtain "eNB-ID←→CSG-ID table", which includes a combination of eNB-ID and CSG-ID of a radio base station HeNB2, from a gateway apparatus HeNB-GW accommodating the radio base station HeNB2; allowing a radio base station eNB to transmit "HO Request" to the gateway apparatus HeNB-GW; and allowing the gateway apparatus HeNB-GW to request the exchange station MME to decide whether the mobile station UE can access the radio base station HeNB2, in response to "HO Request". <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication method, a radio base station, and a gateway device.

  In an E-UTRAN mobile communication system, a mobile station UE connected to a radio base station HeNB (Home eNodeB) operated by a “Hybrid Access” method or a “Closed Access” method is used for attaching (Attach) processing, When performing a service request process or a handover process, the switching center MME checks whether the mobile station UE has an access right to a CSG (Closed Subscriber Group) cell under the radio base station HeNB. It is configured to perform “Accessibility Check”.

  An example of such “Accessibility Check” will be briefly described with reference to FIG.

  As illustrated in FIG. 8, the mobile station UE located in a cell under the radio base station eNB transmits “Measurement Report (step S1001A)” including only PCI (Physical Cell ID) to the radio base station eNB. Alternatively, “Measurement Report (step S1001B)” including PCI and E-CGI (E-UTRA Cell Global ID) is transmitted.

  When the radio base station eNB determines to perform a handover from the radio base station eNB to the radio base station HeNB2 of the mobile station UE based on the received “Measurement Report”, the PCI included in the “Measurement Report” (step S1002A) ) Or e-CGI (step S1002B), the eNB-ID “yyy.001” of the handover target radio base station HeNB2 is determined, and in step S1003, the eNB-ID “yyy.001” of the radio base station HeNB2 is determined. "HO Required" including "is transmitted to the switching center MME.

  In step S1004, the switching center MME refers to the “eNB-ID ← → CSG-ID table” and corresponds to the eNB-ID “yyy.001” of the radio base station HeNB2 included in the received “HO Required”. By extracting the CSG-ID “# 31” and checking whether the CSG-ID “# 31” is included in the “UE CSG Subscription info” for the mobile station UE, the “Accessibility” for the mobile station UE is obtained. “Check”.

  The exchange MME, when establishing the S1 connection with each radio base station HeNB, includes a combination of eNB-ID and CSG-ID of the radio base station HeNB “eNB-ID ← → CSG-ID table. Is configured to get.

TS36.300 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); TS36.401 General Packet Radio Service (GPRS) enhancement for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access

  However, the conventional E-UTRAN mobile communication system is configured such that the gateway device HeNB-GW can be provided between the exchange MME and the radio base station HeNB.

  When such gateway apparatus HeNB-GW is provided, as shown in FIG. 9, the switching center MME is a combination of the eNB-ID and CSG-ID of each radio base station HeNB accommodated in the gateway apparatus HeNB-GW. Therefore, in step S2004, there is a problem that “Accessibility Check” cannot be performed on the above-described mobile station UE.

  Therefore, the present invention has been made in view of the above-described problems, and performs “Accessibility Check” for the mobile station UE even when a gateway apparatus that accommodates a plurality of radio base stations is provided. An object of the present invention is to provide a mobile communication method, a radio base station, and a gateway device that can perform communication.

  A first feature of the present invention is a mobile communication method in which an exchange station manages access information that defines radio base station group identification information accessible by the mobile station, Obtaining a combination of identification information of the second radio base station and radio base station group identification information from a gateway apparatus accommodating the radio base station, and the first radio base station is configured to receive the first radio base of the mobile station. When it is determined to perform a handover from a cell under a station to a cell under the second radio base station, the mobile station identification information and the second radio base station identification information are sent to the gateway device. Including a step of transmitting a handover request signal including: the gateway device accessing the switching center and the mobile station accessing the second radio base station in response to the handover request signal The mobile station refers to the access information and the combination in response to the request, and the mobile station makes a request to the second radio base station. And a step of determining whether or not access is possible.

  According to a second aspect of the present invention, there is provided a mobile communication method in which an exchange station manages access information defining radio base station group identification information accessible by the mobile station, and accommodates the second radio base station. The gateway device managing the combination of the identification information of the second radio base station and the radio base station group identification information, and the first radio base station from the cell under the first radio base station of the mobile station When it is determined to perform handover to a cell under the second radio base station, a handover request signal including identification information of the mobile station and identification information of the second radio base station is sent to the gateway device. Transmitting, acquiring the access information from the exchange in response to the handover request signal, and the gateway device Scan information and on the basis of said combination, the mobile station is summarized in that and a step of determining whether it is accessible to the second radio base station.

  A third feature of the present invention is a gateway device that accommodates a second radio base station, and is configured to manage a combination of identification information and radio base station group identification information of the second radio base station. A management unit, a reporting unit configured to report the combination to the switching center, and a first radio base station from the cell under the first radio base station of the mobile station, the second radio A handover process configured to receive a handover request signal including identification information of the second radio base station from the first radio base station when it is determined to perform a handover to a cell under the base station The handover processing unit determines whether the mobile station can access the second radio base station with respect to the switching center in response to the handover request signal. It is configured to require to determine with a gist of the.

  A fourth feature of the present invention is a gateway apparatus that accommodates a second radio base station, and is configured to manage a combination of identification information and radio base station group identification information of the second radio base station. When the management unit and the first radio base station decide to perform handover of the mobile station from a cell under the first radio base station to a cell under the second radio base station, the first radio base station A handover processing unit configured to receive, from the base station, a handover request signal including identification information of the mobile station and identification information of the second radio base station, and in accordance with the handover request signal, the combination and Whether or not the mobile station can access the second radio base station based on access information defining radio base station group identification information accessible by the mobile station. A determination unit configured to determine, wherein the handover processing unit is configured to acquire the access information from the exchange in response to the handover request signal. The gist.

  According to a fifth aspect of the present invention, there is provided a mobile communication method in which an exchange station manages access information defining radio base station group identification information accessible by the mobile station, Obtaining a combination of identification information of the second radio base station and radio base station group identification information from a gateway apparatus accommodating the radio base station, and the first radio base station is configured to receive the first radio base of the mobile station. When it is determined to perform a handover from a cell under a station to a cell under the second radio base station, the mobile station identification information and the mobile station identification information and the second radio base station via the gateway device are determined. A step of transmitting a handover request signal including identification information of the second radio base station; and the second radio base station sends the second radio to the switching center in response to the handover request signal. Base Requesting the station to determine whether it is accessible, and the switching center refers to the access information and the combination in response to the request, and the mobile station And a step of determining whether or not access to the radio base station is possible.

  A sixth feature of the present invention is a radio base station that functions as a second radio base station accommodated in a gateway device, and manages a combination of identification information and radio base station group identification information of the second radio base station A management unit configured to perform reporting, a reporting unit configured to report the combination to the gateway device, and a first radio base station, the first radio base station of the mobile station When it is determined to perform handover from a subordinate cell to a cell under the second radio base station, a handover request signal including identification information of the second radio base station is received from the first radio base station. A handover processing unit configured as described above, wherein the handover processing unit makes the mobile station communicate with the second radio base station in response to the handover request signal. It is summarized as being configured to request to determine whether or not it is accessible to the station.

  A seventh feature of the present invention is a mobile communication method, wherein a first radio base station is subordinate to a second radio base station that is accommodated in a gateway device from a cell under the first radio base station of the mobile station. When it is determined to perform handover to a cell, it should be determined whether or not the mobile station is accessible to the second radio base station based on the access mode of the second radio base station The gist is to have a step of determining whether or not.

  As described above, according to the present invention, even when a gateway apparatus that accommodates a plurality of radio base stations is provided, a mobile communication method capable of performing “Accessibility Check” for the mobile station UE, A radio base station and a gateway device can be provided.

It is a figure for demonstrating operation | movement of the mobile communication system which concerns on the 1st Embodiment of this invention. 1 is a functional block diagram of a mobile communication system according to a first embodiment of the present invention. It is a figure for demonstrating operation | movement of the mobile communication system which concerns on the modification 1 of this invention. It is a functional block diagram of the mobile communication system which concerns on the modification 1 of this invention. It is a figure for demonstrating operation | movement of the mobile communication system which concerns on the modification 2 of this invention. It is a functional block diagram of the mobile communication system which concerns on the modification 2 of this invention. It is a figure for demonstrating the mobile communication system which concerns on the modification 3 of this invention. It is a figure for demonstrating operation | movement of the conventional mobile communication system. It is a figure for demonstrating the problem of operation | movement of the conventional mobile communication system.

(Mobile communication system according to the first embodiment of the present invention)
With reference to FIG.1 and FIG.2, the structure of the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.

  The mobile communication system according to the present embodiment is an E-UTRAN mobile communication system, and as shown in FIG. 1, an exchange MME, a gateway device HeNB-GW, a radio base station eNB, and a radio base station HeNB.

  With reference to FIG. 1, in the mobile communication system according to the present embodiment, when a mobile station UE performs handover from a cell under the radio base station eNB to a cell under the radio base station HeNB2, “Accessibility” for the mobile station UE is given. The operation of performing “Check” will be described.

  In addition, in the mobile communication system according to the present embodiment, a signal related to handover (Handover Signaling) is configured to be terminated at the gateway device HeNB-GW.

  As illustrated in FIG. 1, the mobile station UE located in a cell under the radio base station eNB may, with respect to the radio base station eNB, perform “Measurement Report (step S101A)” including only PCI, or PCI and “Measurement Report (step S101B)” including the E-CGI is transmitted.

  When the radio base station eNB determines to perform a handover from a cell under the radio base station eNB of the mobile station UE to a cell under the radio base station HeNB2 based on the received “Measurement Report”, the “Measurement Report” Based on the included PCI (step S102A) or E-CGI (step S102B), the eNB-ID “yyy.001” of the handover target radio base station HeNB2 is determined, and in step S103, the identification information of the mobile station UE and “HO Request” including the eNB-ID “yyy.001” of the radio base station HeNB2 is transmitted to the gateway device HeNB-GW.

  Here, in the mobile communication system according to the present embodiment, the identification information of the mobile station UE may be “TMSI: Temporary Mobile Subscriber Identity”, “eNB UE S1AP ID”, or “MME UE S1AP ID”.

  In step S104, the gateway apparatus HeNB-GW determines whether or not the mobile station UE can access the radio base station HeNB2 with respect to the switching center MME in response to the “HO Request”. Send the requested “Access Check Request”.

  The “Access Check Request” includes the eNB-ID “yyy.001” of the radio base station HeNB2, the identification information of the mobile station UE, and the like. Here, the “Access Check Request” may include the CSG-ID “# 31” of the radio base station HeNB2.

  In response to the “Access Check Request”, the switching center MME refers to the “eNB-ID ← → CSG-ID table” including the combination (entry) of the eNB-ID and the CSG-ID of the radio base station HeNB2. The CSG-ID “# 31” corresponding to the eNB-ID “yyy.001” of the radio base station HeNB2 included in the “Access Check Request” is extracted, and the mobile station UE included in the received “Access Check Request” By checking whether or not the CSG-ID “# 31” is included in the “UE CSG Subscription info” for the mobile station UE specified by the information, the “Accessibility Check” is performed on the mobile station UE.

  The exchange MME, when establishing the S1 connection with the gateway device HeNB-GW accommodated in the radio base station HeNB2, includes the combination of the eNB-ID and CSG-ID of the radio base station HeNB2. ← → CSG-ID table ”may be acquired.

  Here, if the CGS-ID “# 31” of the radio base station HeNB2 is included in the received “Access Check Request”, the switching center MME obtains the above “eNB-ID ← → CSG-ID table”. Without reference, the CSG-ID “# 31” of the radio base station HeNB2 included in the “Access Check Request” is extracted, and the movement specified by the identification information of the mobile station UE included in the received “Access Check Request” “Accessibility Check” for the mobile station UE may be performed by checking whether or not the CSG-ID “# 31” is included in the “UE CSG Subscription info” for the station UE.

  In such a case, the switching center MME may not manage the “eNB-ID ← → CSG-ID table” including the combination of the eNB-ID and the CSG-ID of the radio base station HeNB2.

  When the gateway device HeNB-GW receives a notification that the “Accessibility Check” for the mobile station UE has been successful from the switching center MME, the gateway device HeNB-GW transmits “HO Request” to the radio base station HeNB2 in step S105. .

  As illustrated in FIG. 2, in the mobile communication system according to the present embodiment, the radio base station HeNB2 includes a management unit 11 and a report unit 12, and the gateway device HeNB-GW includes a reception unit 21 and a management unit. 22, a report unit 23, and a handover processing unit 24, and the exchange MME includes a reception unit 31, a management unit 32, a determination unit 33, and a notification unit 24.

  The management unit 11 of the radio base station HeNB2 is configured to manage a combination of the eNB-ID “yyy.001” and the CSG-ID “# 31” of the radio base station HeNB2.

  When the reporting unit 12 of the radio base station HeNB2 establishes an S1 connection between the gateway device HeNB-GW and the radio base station HeNB2 at a predetermined timing, for example, the report unit 12 transmits the radio base station to the gateway device HeNB-GW. It is configured to report the combination of eNB-ID “yyy.001” and CSG-ID “# 31” of HeNB2.

  The reception unit 21 of the gateway device HeNB-GW is configured to receive the combination of the eNB-ID and CSG-ID of the radio base stations HeNB1 to HeNB3 reported by the accommodated radio base stations HeNB1 to HeNB3. .

  The management unit 22 of the gateway device HeNB-GW manages the “eNB-ID ← → CSG-ID table” including the combination of the eNB-ID and the CSG-ID of the radio base stations HeNB1 to HeNB3 received by the reception unit 21. It is configured as follows.

  The reporting unit 23 of the gateway device HeNB-GW accommodates the switching center MME at a predetermined timing, for example, when establishing an S1 connection between the gateway device HeNB-GW and the switching center MME. It is configured to report “eNB-ID ← → CSG-ID table” including a combination of eNB-ID and CSG-ID of the existing radio base stations HeNB1 to HeNB3.

  Here, the report unit 23 of the gateway device HeNB-GW may be configured to report only the combination of the eNB-ID and CSG-ID of the predetermined radio base station HeNB to the exchange MME.

  The handover processing unit 24 of the gateway device HeNB-GW determines whether the mobile station UE can access the radio base station HeNB2 with respect to the exchange MME according to the “HO Request” from the radio base station eNB. An “Access Check Request” requesting to determine whether or not is transmitted.

  The receiving unit 31 of the switching center MME receives the “eNB-ID ← → CSG-ID table” including the combination of the eNB-ID and CSG-ID of the radio base stations HeNB2 and HeNB3 reported by the gateway device HeNB-GW. It is configured as follows.

  The management unit 32 of the switching center MME is configured to manage “eNB-ID ← → CSG-ID table” received by the reception unit 31.

  Further, the management unit 32 of the exchange MME is configured to manage “UE CSG Subscription info” for each mobile station UE.

  Here, “UE CSG Subscription info” is access information that defines accessible CSG-ID (radio base station group identification information) of the mobile station UE, accessible time, and the like. The “UE CSG Subscription info” may be in the form of a list indicating identification information of mobile stations UE that can be accessed for each CSG-ID.

  The determination unit 33 of the switching center MME refers to the “UE CSG Subscription info” and “eNB-ID ← → CSG-ID table” for the mobile station UE in response to the “Access Check Request” from the gateway device HeNB-GW. Then, the mobile station UE is configured to perform “Accessibility Check” for the mobile station UE by determining whether or not the mobile station UE can access the radio base station HeNB2.

  The notification unit 34 of the exchange MME is configured to notify the gateway device HeNB-GW of the determination result, that is, the result of “Accessibility Check” for the mobile station UE.

  According to the mobile communication system according to the first embodiment of the present invention, the switching center MME uses the combination of the eNB-ID and the CSG-ID of the radio base station HeNB2 reported from the gateway device HeNB-GW. Therefore, even when the mobile station UE is handed over to a cell under the radio base station HeNB2 accommodated in the gateway device HeNB-GW, “Accessibility Check” for the mobile station UE can be performed.

(Modification 1)
With reference to FIG.3 and FIG.4, the mobile communication system which concerns on the modification 1 of this invention is demonstrated. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the mobile communication system according to the first embodiment.

  Here, with reference to FIG. 3, in the mobile communication system according to the first modification example, when the mobile station UE performs handover from a cell under the radio base station eNB to a cell under the radio base station HeNB2, “Accessibility Check” is performed. Will be described.

  As shown in FIG. 3, the mobile station UE located in a cell under the radio base station eNB may, with respect to the radio base station eNB, “Measurement Report (step S201A)” including only PCI, or PCI and “Measurement Report (step S201B)” including the E-CGI is transmitted.

  When the radio base station eNB determines to perform a handover from a cell under the radio base station eNB of the mobile station UE to a cell under the radio base station HeNB2 based on the received “Measurement Report”, the “Measurement Report” Based on the included PCI (step S202A) or E-CGI (step S202B), the eNB-ID “yyy.001” of the handover target radio base station HeNB2 is determined, and in step S203, the identification information of the mobile station UE and “HO Request” including the eNB-ID “yyy.001” of the radio base station HeNB2 is transmitted to the gateway device HeNB-GW.

  In step S204, in response to the “HO Request”, the gateway device HeNB-GW transmits “Access Check List Request” including the identification information of the mobile station UE to the switching center MME, thereby switching the switching center MME. From “UE CSG Subscription info” for the mobile station UE.

  In step S205, the gateway device HeNB-GW refers to the “eNB-ID ← → CSG-ID table” and sets the eNB-ID “yyy.001” of the radio base station HeNB2 included in the received “HO Request”. The corresponding CSG-ID “# 31” is extracted, and the CSG-ID “#” is included in the “UE CSG Subscription info” for the mobile station UE specified by the identification information of the mobile station UE included in the received “HO Request”. “Accessibility Check” for the mobile station UE is performed by checking whether or not “31” is included.

  When succeeding in “Accessibility Check” for the mobile station UE, the gateway device HeNB-GW transmits the above-mentioned “HO Request” to the radio base station HeNB2 in Step S206.

  As illustrated in FIG. 4, in the mobile communication system according to the first modification, the radio base station HeNB2 includes a management unit 11 and a report unit 12, and the gateway device HeNB-GW includes a reception unit 21 and a management unit. The switching unit MME includes a receiving unit 31, a management unit 32, and a notification unit 34. The switching unit MME includes a receiving unit 31, a reporting unit 23, a handover processing unit 24, and a determination unit 25.

  In response to the “HO Request” transmitted by the radio base station eNB, the handover processing unit 24 of the gateway device HeNB-GW sends “Access Check List Request” including the identification information of the mobile station UE to the switching center MME. By transmitting, it is configured to acquire “UE CSG Subscription info” for the mobile station UE from the switching center MME.

  The determination unit 25 of the gateway device HeNB-GW performs “eNB-ID ← → CSG-ID table” managed by the management unit 22 and “UE CSG Subscription” for the mobile station UE according to the “HO Request” described above. Based on “info”, the mobile station UE is configured to perform “Accessibility Check” on the mobile station UE by determining whether or not the mobile station UE can access the radio base station HeNB2.

  The notification unit 34 of the switching center MME is configured to notify “UE CSG Subscription info” for the mobile station UE in accordance with the “Access Check List Request” received from the gateway device HeNB-GW.

  According to the mobile communication system according to the first modification, the gateway device HeNB-GW is accommodated in the gateway device HeNB-GW using the “UE CSG Subscription info” for the mobile station UE notified from the switching center MME. It is possible to perform “Accessibility Check” for the mobile station UE that is handed over to the cell under the radio base station HeNB2 that is being operated.

(Modification 2)
With reference to FIG.5 and FIG.6, the mobile communication system which concerns on the modification 2 of this invention is demonstrated. Hereinafter, the mobile communication system according to the second modification will be described with a focus on differences from the mobile communication system according to the first embodiment described above.

  With reference to FIG. 5, in the mobile communication system according to the present embodiment, when the mobile station UE performs handover from a cell under the radio base station eNB to a cell under the radio base station HeNB2, “Accessibility” for the mobile station UE is given. The operation of performing “Check” will be described.

  As shown in FIG. 5, the mobile station UE located in the cell under the radio base station eNB sends “Measurement Report” including only PCI, or PCI and E-CGI to the radio base station eNB. Including “Measurement Report (Step S301)” is transmitted.

  When the radio base station eNB determines to perform a handover from a cell under the radio base station eNB of the mobile station UE to a cell under the radio base station HeNB2 based on the received “Measurement Report”, the “Measurement Report” Based on the included PCI or E-CGI (step S302), the eNB-ID “yyy.001” of the handover destination radio base station HeNB2 is determined, and in step S303, the identification information of the mobile station UE and the radio base station HeNB2 The “HO Request” including the eNB-ID “yyy.001” is transmitted to the gateway device HeNB-GW.

  In step S304, the gateway device HeNB-GW transmits the “HO Request” to the radio base station HeNB2.

  In step S305, the radio base station HeNB2 requests the exchange MME to determine whether or not the mobile station UE is accessible to the radio base station HeNB2 in response to the “HO Request”. “Access Check Request” is transmitted.

  In response to the “Access Check Request”, the switching center MME refers to the “eNB-ID ← → CSG-ID table” and the eNB-ID “yyy.” Of the radio base station HeNB2 included in the “Access Check Request”. The CSG-ID “# 31” corresponding to “001” is extracted, and the mobile station identified by the identification information of the mobile station UE (for example, “Source MME S1AP UE-ID”) included in the received “Access Check Request” By checking whether or not the CSG-ID “# 31” is included in the “UE CSG Subscription info” for the UE, the “Accessibility Check” for the mobile station UE is performed.

  The exchange MME, when establishing the S1 connection with the gateway device HeNB-GW accommodated in the radio base station HeNB2, includes the combination of the eNB-ID and CSG-ID of the radio base station HeNB2. ← → CSG-ID table ”may be acquired.

  As shown in FIG. 6, in the mobile communication system according to the present embodiment, the radio base station HeNB2 includes a management unit 11, a report unit 12, and a handover processing unit 13, and the gateway device HeNB-GW receives The switching unit MME includes a receiving unit 31, a managing unit 32, a determining unit 33, and a notifying unit 34. The switching unit MME includes a receiving unit 31, a managing unit 22, and a reporting unit 23.

  The handover processing unit 13 of the radio base station HeNB2 determines whether the mobile station UE can access the radio base station HeNB2 with respect to the exchange MME according to the “HO Request” received from the radio base station eNB. An “Access Check Request” requesting to determine whether or not is transmitted.

  The determination unit 33 of the switching center MME refers to the “UE CSG Subscription info” and “eNB-ID ← → CSG-ID table” for the mobile station UE in response to the “Access Check Request” from the radio base station HeNB2. Thus, the mobile station UE is configured to perform “Accessibility Check” on the mobile station UE by determining whether or not the radio base station HeNB2 is accessible.

  The notification unit 34 of the exchange MME is configured to notify the radio base station HeNB2 of the determination result, that is, the result of “Accessibility Check” for the mobile station UE.

  According to the mobile communication system according to the first embodiment of the present invention, the switching center MME uses the combination of the eNB-ID and the CSG-ID of the radio base station HeNB2 reported from the gateway device HeNB-GW. Therefore, even when the mobile station UE is handed over to a cell under the radio base station HeNB2 accommodated in the gateway device HeNB-GW, “Accessibility Check” for the mobile station UE can be performed.

(Modification 3)
With reference to FIG. 7, a mobile communication system according to Modification 3 of the present invention is described. Hereinafter, the mobile communication system according to the third modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.

  In the mobile communication system according to the first embodiment and the first and second modification examples 1 and 2, the handover source radio base station eNB performs the access mode of the cell under the handover destination radio base station HeNB (“Target Cell shown in FIG. 7). “Access Mode”) may be configured to manage.

  The handover source radio base station eNB can manage the access mode of the cell under the handover destination radio base station HeNB as any one of the “Closed” mode, the “Hybrid” mode, and the “Open” mode.

  Here, the “Closed” mode is a mode in which use is permitted only to the mobile stations UE belonging to the CSG of the target cell.

  The “Hybrid” mode is a mode in which high-quality communication is permitted to mobile stations UE belonging to the CSG of the target cell, and best-effort quality communication is permitted to other mobile stations UE.

  The “Open” mode is a mode in which the use is permitted for all the mobile stations UE, similarly to the macro cell.

  Here, when the access mode of the cell under the handover destination radio base station HeNB is the “Closed” mode or the “Hybrid” mode, the handover source radio base station eNB performs “Accessibility Check” for the mobile station UE to be handed over. If the access mode of the cell under the handover target radio base station HeNB is the “Open” mode, it is not necessary to perform “Accessibility Check” for the mobile station UE to be handed over It may be configured to determine.

  Note that the handover-source radio base station eNB may be configured to include a bit indicating whether or not the “Accessibility Check” is necessary in the above-mentioned “HO Request” and transmit the bit to the gateway apparatus HeNB-GW. .

  Here, the handover source radio base station eNB determines the access mode of the cell under the handover destination radio base station HeNB based on the PCI included in the “Measurement Report” or the like transmitted from the mobile station UE. It may be configured.

  In such a case, the PCI range in the “Closed” mode, the PCI range in the “Hybrid” mode, and the PCI range in the “Open” mode may be defined separately.

  For example, in the mobile communication system according to the first embodiment described above, the gateway device HeNB-GW transmits “Access Check Request” to the switching center MME based on a bit indicating whether or not “Accessibility Check” is necessary. Decide whether or not to do so.

  Also, in the mobile communication system according to Modification 2 described above, whether or not the radio base station HeNB2 transmits “Access Check Request” to the switching center MME based on the bit indicating whether or not “Accessibility Check” is necessary. Decide on.

  Further, in the mobile communication system according to the first modification described above, the gateway device HeNB-GW transmits “Access Check List Request” to the switching center MME based on the bit indicating whether or not “Accessibility Check” is necessary. Decide whether or not.

  Further, in the mobile communication system according to the modified example 3, based on the bit indicating whether or not the “Accessibility Check” is necessary, the handover from the cell under the radio base station eNB of the mobile station UE to the cell under the radio base station HeNB2 is performed. , S1 handover or X2 handover via the gateway device HeNB-GW is determined.

  Here, for example, as illustrated in FIG. 7, when the radio base station eNB determines that the S1 handover should be performed, the radio base station eNB determines that the mobile station UE should perform “Accessibility Check” in the switching center MME. It may be configured to. In such a case, the operation of the mobile communication system according to the third modification is the operation illustrated in FIG. 1 or FIG.

  In addition, for example, as illustrated in FIG. 7, when it is determined that the radio base station eNB should perform an X2 handover via the gateway device HeNB-GW, the radio base station eNB does not perform “Accessibility Check” for the mobile station UE. It may be configured to determine.

  In addition, the node configured to perform “Accessibility Check” such as the switching center MME and the gateway device HeNB-GW is the handover destination radio base station in the “eNB-ID ← → CSG-ID table” or the like. The access mode of the cell under HeNB may be managed, and it may be configured to determine whether or not “Accessibility Check” should be performed on the above-described handover target mobile station UE.

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

  A first feature of the present embodiment is a mobile communication method, in which the switching center MME defines a CSG-ID (radio base station group identification information) accessible by the mobile station UE. The process of managing the “CSG Subscription info” (access information) and the exchange MME from the gateway device HeNB-GW accommodating the radio base station HeNB2 (second radio base station), the eNB-ID (identification of the radio base station HeNB2) Information) and a step of acquiring “eNB-ID ← → CSG-ID table” including a combination of CSG-ID, and the radio base station eNB (first radio base station) is under the control of the radio base station eNB of the mobile station UE When it is decided to perform handover from the cell to the cell under the radio base station HeNB2, the mobile device moves to the gateway device HeNB-GW. The gateway device HeNB-GW transmits the “HO Request (handover request signal)” including the identification information of the station UE and the eNB-ID of the radio base station HeNB2, and the gateway device HeNB-GW responds to the “HO Request” to the switching center MME. On the other hand, a step of transmitting an “Access Check Request” requesting the mobile station UE to determine whether or not the radio base station HeNB2 is accessible, and the switching center MME performs the “Access Check Request”. Whether the mobile station UE can access the radio base station HeNB2 with reference to “UE CSG Subscription info” and “eNB-ID ← → CSG-ID table” for the mobile station UE And having a process for determining The

  The second feature of the present embodiment is a mobile communication method, in which the switching center MME manages the “UE CSG Subscription info” for the mobile station UE, and the gateway device HeNB− that houses the radio base station HeNB2. A step in which the GW manages an “eNB-ID ← → CSG-ID table” including a combination of the eNB-ID and the CSG-ID of the radio base station HeNB2, and the radio base station eNB is a radio base station eNB of the mobile station UE When it is determined to perform a handover from a subordinate cell to a cell under the radio base station HeNB2, the gateway device HeNB-GW includes the identification information of the mobile station UE and the eNB-ID of the radio base station HeNB2. The step of transmitting “HO Request” and the gateway device HeNB-GW to “HO Request” Next, a process of obtaining “UE CSG Subscription info” for the mobile station UE from the switching center MME, and the gateway device HeNB-GW performs “UE CSG Subscription info” and “eNB-ID ← →” for the mobile station UE. And a step of determining whether or not the mobile station UE can access the radio base station HeNB2 based on the “CSG-ID table”.

  A third feature of the present embodiment is a gateway device HeNB-GW that accommodates the radio base station HeNB2, and includes a combination of eNB-ID and CSG-ID of the radio base station HeNB2, "eNB-ID ← → CSG- The management unit 22 configured to manage the “ID table” and the reporting unit configured to report the “eNB-ID ← → CSG-ID table” or the above combination to the exchange MME. 23, when the radio base station eNB decides to perform a handover from the cell under the radio base station eNB of the mobile station UE to the cell under the radio base station HeNB2, the radio base station HeNB2 Handover processing unit 24 configured to receive “HO Request” including the eNB-ID of the In response to “HO Request”, the processing unit 24 requests the switching center MME to determine whether or not the mobile station UE is accessible to the radio base station HeNB2 “Access Check Request”. The gist of this is that it is configured to transmit.

  A fourth feature of the present embodiment is a gateway device HeNB-GW that accommodates the radio base station HeNB2, and includes a combination of eNB-ID and CSG-ID of the radio base station HeNB2, "eNB-ID ← → CSG- The management unit 22 configured to manage the “ID table” and the radio base station eNB decide to perform a handover from a cell under the radio base station eNB of the mobile station UE to a cell under the radio base station HeNB2 The handover processing unit 24 configured to receive the “HO Request” including the identification information of the mobile station UE and the eNB-ID of the radio base station HeNB2 from the radio base station eNB, and the “HO Request” "ENB-ID ← → CSG-ID table" and "UE CSG Subscribe" for the mobile station UE. a determination unit 25 configured to determine whether or not the mobile station UE is accessible to the radio base station HeNB2 based on “tion info”, and the handover processing unit 24 includes: The gist is that it is configured to acquire “UE CSG Subscription info” for the mobile station UE from the exchange MME in response to the “HO Request”.

  A fifth feature of the present embodiment is a mobile communication method in which the switching center MME manages “UE CSG Subscription info” for the mobile station UE that defines accessible CSG-IDs of the mobile station UE. Then, the switching center MME obtains the “eNB-ID ← → CSG-ID table” including the combination of the eNB-ID and the CSG-ID of the radio base station HeNB2 from the gateway device HeNB-GW that accommodates the radio base station HeNB2. And when the radio base station eNB decides to perform a handover from a cell under the radio base station eNB of the mobile station UE to a cell under the radio base station HeNB2, the radio base station eNB performs radio communication via the gateway device HeNB-GW. For the base station HeNB2, “HO including the identification information of the mobile station UE and the eNB-ID of the radio base station HeNB2 And the radio base station HeNB2 determines whether or not the mobile station UE can access the radio base station HeNB2 with respect to the switching center MME according to the “HO Request”. In response to the “Access Check Request”, the exchange MME sends a “UE CSG Subscription info” and “eNB-ID ← → CSG-” for the mobile station UE in accordance with the “Access Check Request”. The gist of the present invention is to refer to the “ID table” and to determine whether or not the mobile station UE can access the radio base station HeNB2.

  A sixth feature of the present embodiment is a radio base station HeNB2 accommodated in the gateway device HeNB-GW, which includes a combination of eNB-ID and CSG-ID of the radio base station HeNB2, “eNB-ID ← → CSG The management unit 11 configured to manage the “-ID table” and the gateway device HeNB-GW are configured to report the “eNB-ID ← → CSG-ID table” or the combination described above. And when the radio base station eNB determines that the mobile base station eNB performs handover from the cell under the radio base station eNB of the mobile station UE to the cell under the radio base station HeNB2, A handover processing unit 13 configured to receive an “HO Request” including the eNB-ID of the base station HeNB2. In response to “HO Request”, the handover processing unit 13 requests the exchange MME to determine whether or not the mobile station UE is accessible to the radio base station HeNB2. The gist is that it is configured to transmit “Check Request”.

  A seventh feature of the present embodiment is a mobile communication method, in which a radio base station eNB is subordinate to a radio base station HeNB2 accommodated in a gateway device HeNB-GW from a cell under the radio base station eNB of the mobile station UE. Mobile station UE to radio base station HeNB2 based on the access mode (“Closed” mode, “Hybrid” mode or “Open” mode) of radio base station HeNB2 The gist of the present invention is to have a step of determining whether or not to determine whether or not access is possible (whether to perform “Accessibility Check” for the mobile station UE).

  Note that the operations of the radio base station eNB / HeNB, the mobile station UE, the gateway device HeNB-GW, and the switching center MME described above may be performed by hardware or may be performed by a software module executed by a processor. It may be implemented by a combination of both.

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

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB / HeNB, the mobile station UE, the gateway device HeNB-GW, or the exchange MME. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB / HeNB, the mobile station UE, the gateway device HeNB-GW, or the exchange MME.

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

eNB, HeNB ... radio base station HeNB-GW ... gateway device MME ... exchanges 11, 22, 32, 42 ... management unit 12, 23 ... reporting unit 25, 33 ... determination unit 21, 31 ... reception unit 24 ... handover processing unit 34 ... Notification section

Claims (7)

A switching center managing access information defining radio base station group identification information accessible by a mobile station;
The exchange acquires a combination of identification information of the second radio base station and radio base station group identification information from the gateway device accommodating the second radio base station;
When the first radio base station decides to perform a handover from the cell under the first radio base station of the mobile station to the cell under the second radio base station, the gateway device Transmitting a handover request signal including identification information of a mobile station and identification information of the second radio base station;
The gateway device requesting the exchange to determine whether the mobile station is accessible to the second radio base station in response to the handover request signal;
The switching station has a step of determining whether or not the mobile station can access the second radio base station by referring to the access information and the combination in response to the request. A mobile communication method characterized by the above. A switching center managing access information defining radio base station group identification information accessible by a mobile station;
A step of managing a combination of identification information of the second radio base station and radio base station group identification information by a gateway device accommodating the second radio base station;
When the first radio base station decides to perform a handover from the cell under the first radio base station of the mobile station to the cell under the second radio base station, the gateway device Transmitting a handover request signal including identification information of a mobile station and identification information of the second radio base station;
The gateway device obtaining the access information from the exchange in response to the handover request signal;
And a step of determining whether or not the mobile station is accessible to the second radio base station based on the access information and the combination. . A gateway device accommodating a second radio base station,
A management unit configured to manage a combination of identification information of the second radio base station and radio base station group identification information;
A reporting unit configured to report the combination to the switching center;
When the first radio base station determines to perform handover of the mobile station from the cell under the first radio base station to the cell under the second radio base station, from the first radio base station, A handover processing unit configured to receive a handover request signal including identification information of the second radio base station,
In response to the handover request signal, the handover processing unit requests the switching station to determine whether or not the mobile station is accessible to the second radio base station. A gateway device, comprising: A gateway device accommodating a second radio base station,
A management unit configured to manage a combination of identification information of the second radio base station and radio base station group identification information;
When the first radio base station determines to perform handover of the mobile station from the cell under the first radio base station to the cell under the second radio base station, from the first radio base station, A handover processing unit configured to receive a handover request signal including identification information of the mobile station and identification information of the second radio base station;
In response to the handover request signal, the mobile station can access the second radio base station based on the combination and access information defining radio base station group identification information accessible by the mobile station. A determination unit configured to determine whether or not,
The gateway apparatus, wherein the handover processing unit is configured to acquire the access information from the exchange in response to the handover request signal. A switching center managing access information defining radio base station group identification information accessible by a mobile station;
The exchange acquires a combination of identification information of the second radio base station and radio base station group identification information from the gateway device accommodating the second radio base station;
When the first radio base station decides to perform handover of the mobile station from the cell under the first radio base station to the cell under the second radio base station, the first radio base station passes the gateway device through the gateway device. Transmitting a handover request signal including identification information of the mobile station and identification information of the second radio base station to two radio base stations;
In response to the handover request signal, the second radio base station requests the switching center to determine whether the mobile station is accessible to the second radio base station. Process,
The switching station has a step of determining whether or not the mobile station can access the second radio base station by referring to the access information and the combination in response to the request. A mobile communication method characterized by the above. A wireless base station that functions as a second wireless base station accommodated in a gateway device,
A management unit configured to manage a combination of identification information of the second radio base station and radio base station group identification information;
A reporting unit configured to report the combination to the gateway device;
When the first radio base station determines to perform handover of the mobile station from the cell under the first radio base station to the cell under the second radio base station, from the first radio base station, A handover processing unit configured to receive a handover request signal including identification information of the second radio base station,
The handover processing unit is configured to request the switching center to determine whether or not the mobile station is accessible to the second radio base station in response to the handover request signal. A radio base station characterized in that   When the first radio base station determines to perform a handover from the cell under the first radio base station of the mobile station to the cell under the second radio base station accommodated in the gateway device, the second radio base station Mobile communication comprising a step of determining whether or not the mobile station should be able to access the second radio base station based on an access mode of the radio base station Method.

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