JP2019080117A - Control device - Google Patents

Abstract

To reduce the signaling cost of an entire network.SOLUTION: Cont1 manages multiple GW2, and when notification of a change regarding UE3 accommodated in GW2 is performed, some of multiple GW2 are determined to be GW2 notified of the change, and the determined GW2 is notified of the change. GW2 that has accommodated UE3 before change may be determined to be GW2 notified of the change. GW2 adjacent to GW2 that accommodates UE3 after change may be determined to be GW2 notified of the change. GW2 in communication with UE3 may be determined to be GW2 notified of the change. GW2 in communication with UE3 may be inquired of UE 3, and GW2 obtained by the inquiry may be determined to be GW2 notified of the change.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a control device that manages a plurality of gateway devices each capable of accommodating a terminal.

  Conventionally, SDN (Software Defined Networking), which is a technology for controlling a physical network by software, is known. For example, in Non-Patent Document 1 below, OpenFlow (registered trademark) which is one of SDN communication protocols is disclosed.

“OpenFlow Switch Specification Version 1.0.0 (Wire Protocol 0x01)”, [online], December 31, 2009, Open Networking Foundation, [October 16, 2017 search], Internet <URL: http: // archive. openflow.org/documents/openflow-spec-v1.0.0.pdf>

  In the packet transmission from the source terminal to the destination terminal in the mobile communication network based on the SDN, when the gateway apparatus accommodating the destination terminal is changed from the old destination gateway apparatus to the new destination gateway apparatus due to movement of the destination terminal The new destination gateway device notifies the control device that manages the gateway device of the change of the destination of the destination terminal. The control device notified of the change notifies all the subordinate gateway devices of the change. Thus, there is a problem that the signaling cost of the entire network is increased because the change is notified to all the gateway devices for every movement of the terminal.

  Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a control device capable of reducing the signaling cost of the entire network.

  In order to solve the above problems, the control device of the present invention is a control device that manages a plurality of gateway devices, and when a change related to a terminal accommodated by the gateway device is notified, as a gateway device that notifies the change. A part of the plurality of gateway devices is determined, and the determined gateway device is notified of the change.

  According to such a control device, when a change regarding the terminal accommodated by the gateway device is notified, the change is notified to some of the plurality of gateway devices. That is, since the change is not notified to all of the plurality of gateway devices, and the change is notified to some of the gateway devices, the signaling cost of the entire network can be reduced.

  According to the present invention, the signaling cost of the entire network can be reduced.

FIG. 1 is a system configuration diagram of a mobile network according to the prior art. It is a figure which shows the example of a table of the destination information stored in GW2aZ of FIG. It is a figure which shows the example of a table of the destination information stored in GW2dZ of FIG. It is a figure which shows the example of a table of the control information stored in Cont1Z of FIG. It is a sequence diagram which shows the process performed by the mobile body network of FIG. FIG. 1 is a system configuration diagram of a mobile network including a control device according to an embodiment of the present invention. It is a sequence diagram which shows the process performed with the mobile body network of FIG. 6 in 1st Embodiment. It is a figure which shows the example of a table of the control information stored in Cont1 of FIG. 6 in 2nd Embodiment. It is a sequence diagram which shows the process performed by the mobile body network of FIG. 6 in 2nd Embodiment. It is a figure which shows the example of a table of the control information stored in Cont1 of FIG. 6 in 3rd Embodiment. It is a figure which shows the example of a table of the destination information stored in GW2d of FIG. 6 in 3rd Embodiment. It is a sequence diagram which shows the process performed with the mobile body network of FIG. 6 in 3rd Embodiment. It is a figure which shows the example of a table of the control information stored in Cont1 of FIG. 6 in 4th Embodiment. It is a sequence diagram which shows the process performed by the mobile body network of FIG. 6 in 4th Embodiment. It is a functional block diagram of a control device concerning an embodiment of the present invention. It is a hardware block diagram of the control apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the control device will be described in detail with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description. The embodiments in the following description are specific examples of the present invention, and it is not limited to these embodiments unless specifically stated to limit the present invention.

  First, a mobile network according to the prior art based on SDN will be described using FIGS.

  FIG. 1 is a system configuration diagram of a mobile network according to the prior art. As shown in FIG. 1, the mobile network according to the prior art is Cont1Z which is a controller (Controller, Cont), GW2aZ (identification information is “GW # 1”) which is a gateway device, GW2bZ (identification information is “GW # 2 ), GW2cZ (identification information is “GW # 3”), GW2dZ (identification information is “GW # 4”), and GW2eZ (identification information is “GW # 5”) (collectively the gateway devices above “GW2Z” And UE3 (User Identification) is UE3aZ (identification information is “UE # 1”), UE3bZ (identification information is “UE # 2”) and UE3cZ (identification information is “UE # 3”). The above UEs are collectively referred to as “UE3Z” as appropriate.

  The GW 2 Z is, for example, an eNodeB or a User Plane Function (UPF) in 5G (5th generation mobile communication system) or the like. The GW 2 Z accommodates the UE 3 Z located in an area controlled by the own device (a radio wave of the own device can reach). The UE 3 Z performs mobile communication via the GW 2 Z accommodating the UE 3 Z. When the UE 3 Z moves to another area, the UE 3 Z's accommodation destination is changed to another GW 2 Z that has jurisdiction over the other area. FIG. 1 shows a scene in which the UE 3aZ initially accommodated in the GW 2aZ is accommodated in the GW 2bZ as it moves. Besides, UE3bZ is accommodated in GW2dZ. Also, the GWs 2 Z can communicate with each other via a network or the like.

  The GW2Z receives a packet (U-Plane packet) transmitted from a node constituting a mobile network, such as UE3Z or another GW2Z, and based on destination information stored in advance in its own device, UE3Z or another GW2Z And so forth to the nodes that make up the mobile network. FIGS. 2 and 3 are diagrams showing an example of a table of destination information stored in the GW 2 Z. Details of FIGS. 2 and 3 will be described later. The GW 2 Z updates the destination information based on an instruction (control, C-Plane signal) from the Cont 1 Z or an instruction from the administrator.

  Cont1Z is, for example, an access and mobility management function (AMF) or a session management function (SMF) in 5G. Cont1Z manages GW2Z accommodating UE3Z. The Cont 1 Z can communicate with the subordinate GW 2 Z or UE 3 Z via a network or the like. Cont 1 Z manages and controls the subordinate GW 2 Z or UE 3 Z based on control information stored in advance in the own device. FIG. 4 is a diagram showing an example of a table of control information stored in Cont1Z. Details of FIG. 4 will be described later. Cont 1 Z updates control information based on a change of a node of the mobile network or an instruction from a manager.

  UE3Z is a terminal carried by the user. The UEs 3Z can communicate with each other via the mobile network shown in FIG. More specifically, the UE3Z of the communication source communicates with the UE3Z of the communication destination via the GW2Z accommodating the UE3Z of the communication source and the GW2Z accommodating the UE3Z of the communication destination in order.

  FIG. 5 is a sequence diagram showing a process performed by the mobile network shown in FIG. As a premise, GW2aZ stores the destination information shown in FIG. 2A, GW2dZ stores the destination information shown in FIG. 3A, and Cont1Z stores the control information shown in FIG. 4A. It shall be. As shown in FIG. 2A, the destination information stored in the GW 2aZ is an EID that is identification information of the UE 3 Z, and an RLOC that is identification information of the GW 2 Z that indicates the location of the UE 3 Z (indicating the location of the UE 3 Z). And Routing Locators). The destination information shown in FIG. 2A indicates that the GW 2 dZ accommodates the UE 3 b Z. In addition, as shown in FIG. 3A, the destination information stored in the GW2dZ is identification information of the EID, which is identification information of the UE3Z, and identification information of the GW2Z accommodating the UE3Z (indicating the location of the UE3Z). And RLOC. The destination information shown in FIG. 3A indicates that the GW 2 aZ accommodates the UE 3 aZ. Further, as shown in FIG. 4A, the control information stored in Cont1Z is identification information of UE3Z identification information EID and identification information of GW2Z accommodating the UE3Z (indicating the location of UE3Z). And RLOC. The control information shown in FIG. 4A indicates that the GW 2 aZ accommodates the UE 3 aZ and the GW 2 dZ accommodates the UE 3 bZ.

  First, steps S1Z to S3Z in FIG. 5 in which update notification is performed when the accommodation destination of UE3aZ changes from GW2aZ to GW2bZ with the movement of UE3aZ will be described. After the UE3aZ moves, the UE3aZ transmits a registration instruction including the identification information “UE # 1” of its own terminal and the identification information “GW # 2” of the new accommodation destination GW2bZ to the new accommodation destination GW2bZ. (S1Z). The GW 2 b Z that has received the registration instruction transmits, to the Cont 1 Z, an update instruction including the identification information “UE # 1” and “GW # 2” included in the registration instruction (S 2 Z). The Cont 1 Z that has received the update instruction updates the control information based on the update instruction. FIG. 4B shows control information after the control information shown in FIG. 4A has been updated based on the update instruction. As shown in FIG. 4 (b), the gateway apparatus that accommodates the UE 3aZ is changed from GW2aZ to GW2bZ.

  Subsequently, Cont1Z is information indicating that UE3aZ is accommodated by GW2bZ (for example, information of a pair of identification information “UE # 1” and identification information “GW # 2” included in the update instruction received in S2Z) ) Is transmitted to all subordinate GWs 2 (S3Z). As such, since the update instruction is transmitted to each of all GWs 2 for each movement of UE 3 Z, the signaling cost is increased and the processing load of all GWs 2 is increased. In addition, since the above communication of S1Z to S3Z is communication by the C-Plane signal, it is a C-Plane driven update notification (path update).

  The GW 2aZ that has received the update instruction in S3Z updates the destination information based on the update instruction. FIG. 2B shows destination information after the destination information shown in FIG. 2A has been updated based on the update instruction. As shown in FIG. 2 (b), GW2bZ (indicated by identification information "GW # 2" included in the update instruction) is a gateway apparatus that accommodates UE3aZ (indicated by the identification information "UE # 1 included in the update instruction"). It is registered additionally.

  The GW 2 d Z that has received the update instruction at S 3 Z updates the destination information based on the update instruction. FIG. 3B shows destination information after the destination information shown in FIG. 3A has been updated based on the update instruction. As shown in FIG. 3 (b), the gateway apparatus that accommodates UE3aZ (indicated by the identification information "UE # 1" included in the update instruction) is from GW2aZ (indicated by identification information "GW # 2" included in the update instruction). It has been changed to GW2bZ.

  Next, steps S4Z to S6Z in FIG. 5 in which packet transmission is performed after the above-described update notification will be described. The UE 3bZ serving as the transmission source transmits a packet (U-Plane packet) including identification information “UE # 1” of the UE 3aZ serving as the destination terminal to the accommodation destination GW 2d Z (S4Z). The GW 2 d Z that has received the packet transfers the packet to the GW 2 b Z based on the destination information (S 5 Z). More specifically, the GW 2 d Z transfers the packet to the GW 2 b Z indicated by the identification information “GW # 2” associated with the identification information “UE # 1” included in the packet received in the destination information of FIG. . The GW 2 b Z that has received the packet transfers the received packet to the accommodated UE 3 a Z (S 6 Z). The above is the description of packet transmission.

  This completes the description of the mobile network according to the prior art. Subsequently, a mobile network including Cont 1 will be described with reference to FIGS. The system configuration of the mobile network including the Cont1 shown in FIG. 6 is the same as the system configuration of the mobile network according to the prior art shown in FIG. 1 (each node shown in FIG. Destination information or control information shown in FIGS. 8, 10, 11 and 13 corresponds to the destination information or control information shown in FIG. The same explanation is omitted in the following, and the difference will be mainly described. For the sake of convenience, the system configuration shown in FIG. 6 is commonly used from the first embodiment to the fourth embodiment described below (the reference numerals are not changed according to the embodiment).

First Embodiment
FIG. 7 is a sequence diagram showing processing executed by the mobile network shown in FIG. 6 in the first embodiment. As a premise, the GW 2 a, the GW 2 b, and the GW 2 d are geographically (physically) adjacent to each other, and the UE 3 a accommodated in the GW 2 a or GW 2 b communicates with the UE 3 b accommodated in the GW 2 d.

  First, steps S1a to S3a in FIG. 7 in which update notification is performed when the accommodation destination of the UE 3a is changed from the GW 2a to the GW 2b with the movement of the UE 3a will be described. After the UE 3a moves, the UE 3a transmits a registration instruction including the identification information “UE # 1” of its own terminal and the identification information “GW # 2” of the new accommodation GW2 b to the new accommodation GW 2 b. (S1a). The GW 2 b having received the registration instruction transmits an update instruction including identification information “UE # 1” and “GW # 2” included in the registration instruction to the Cont 1 (S 2 a). Cont1 having received the update instruction updates the control information based on the update instruction. FIG. 4B shows control information after the control information shown in FIG. 4A (the control information is assumed to have been stored in Cont 1) is updated based on the update instruction. As shown in FIG. 4 (b), the gateway apparatus accommodating the UE 3a is changed from the GW 2a to the GW 2b.

  Subsequently, Cont1 is information indicating that UE 3a is accommodated by GW 2b (for example, information of a set of identification information “UE # 1” and identification information “GW # 2” included in the update instruction received in S2a) ) Is sent to (only) the GW 2a that has accommodated the UE 3a before the movement of the UE 3a (S3a). More specifically, Cont1 is received at S2a in the control information of FIG. 4A (it is assumed that the control information is stored in Cont1) after S2a and before updating the control information. The update instruction is transmitted to the GW 2 a indicated by the identification information “GW # 1” associated with the identification information “UE # 1” included in the update instruction. The S1a registration instruction and the S2a update instruction further include the identification information “GW # 1” of the GW 2a that has accommodated the UE 3a before moving the UE 3a, and Cont1 is included in the update instruction received in S2a. The update instruction may be transmitted to the GW 2 a indicated by the identified identification information “GW # 1”. The GW 2a that has received the update instruction at S3a updates the destination information based on the update instruction. FIG. 2B shows destination information after the destination information shown in FIG. 2A has been updated based on the update instruction. As shown in FIG. 2 (b), GW2b (indicated by identification information "GW # 2" included in the update instruction) is a gateway apparatus that accommodates the UE 3a (indicated by the identification information "UE # 1 included in the update instruction"). It is registered additionally. The above is the description of the update notification in the first embodiment.

  Next, steps S1 'to S6' in FIG. 7 in which packet transmission from the UE 3c accommodated by the GW 2c which is the remote GW 2 after the update notification described above is performed will be described. The UE 3c serving as the transmission source transmits a packet (U-Plane packet) including the identification information "UE # 1" of the UE 3a serving as the destination terminal to the accommodation destination GW 2c (S1 '). The GW 2 c having received the packet transfers the packet to the GW 2 a based on the destination information (continues transfer) (S 2 ′). More specifically, the GW 2 c is associated with the identification information “UE # 1” included in the packet received in the destination information (the control information is stored in the GW 2 c) in FIG. 3A. The packet is transferred to the GW 2 a indicated by the identification information “GW # 1”.

  The GW 2 a having received the packet transfers the packet to the GW 2 b based on the destination information (S 3 ′). More specifically, the GW 2a is associated with the identification information "UE # 1" included in the packet received in the destination information (the control information is stored in the GW 2a) in FIG. 2 (b). The packet is transferred to the GW 2 b indicated by the identification information “GW # 2”. Next, the GW 2 a instructs the GW 2 c as the transmission source of the packet received in S 2 ′ to update the destination information including the information indicating that the UE 3 a is accommodated by the GW 2 b obtained in the process of S 3 a And transmit (S4 '). The order of S3 'and S4' may be reversed. That is, after S2 ', the GW 2a may transmit an update instruction of destination information to the GW 2c, and then transfer the packet received in S2' to the GW 2b.

  The GW 2 c that has received the update instruction at S <b> 4 ′ updates the destination information based on the update instruction. FIG. 3B shows destination information after the destination information shown in FIG. 3A has been updated based on the update instruction. As shown in FIG. 3 (b), the gateway apparatus accommodating the UE 3a is changed from the GW 2a to the GW 2b. Thereafter, when the received packet has the UE 3a as a destination, the GW 2c transfers the packet to the GW 2b accommodating the UE 3a (continues transfer) based on the updated destination information (S5 '). More specifically, when the GW 2 c receives a packet including the identification information “UE # 1” as the destination, the identification information “UE # 1” associated with the identification information “UE # 1” in the destination information of FIG. The packet is forwarded to the GW 2 b indicated by “GW # 2”. The GW 2 b that has received the packet transfers the received packet to the accommodated UE 3 a based on the destination information (S 6 ′).

  If the packet is transmitted from the remote GW 2 c before the information of the UE 3 a held by the GW 2 a is updated after S 3 a, the GW 2 a identifies the Cont1 included in the received packet before S 3 ′. Sends an RLOC request (inquiry of GW2 accommodating the destination terminal) including information "UE # 1", receives an RLOC response including identification information "GW # 2" as a response, and based on the received RLOC response, S3 Perform the processing of 'and S4'. The above is the description of packet transmission in the first embodiment.

Second Embodiment
FIG. 9 is a sequence diagram showing processing executed by the mobile network shown in FIG. 6 in the second embodiment. As a premise, the GW 2 a, the GW 2 b, and the GW 2 d are geographically (physically) adjacent to each other, and the UE 3 a accommodated in the GW 2 a or GW 2 b communicates with the UE 3 b accommodated in the GW 2 d. Further, as a premise, it is assumed that Cont1 stores control information shown in FIG. As shown in FIG. 8, the control information stored in Cont 1 includes identification information of the GW 2 and identification information of one or more GWs 2 adjacent to the GW 2. The control information shown in FIG. 8 indicates that the GW 2 a and the GW 2 d are adjacent to the GW 2 b.

  Steps S1b to S3b in FIG. 9 in which update notification is performed when the accommodation destination of the UE 3a is changed from the GW 2a to the GW 2b with the movement of the UE 3a will be described. After the UE 3a moves, the UE 3a transmits a registration instruction including the identification information “UE # 1” of its own terminal and the identification information “GW # 2” of the new accommodation GW2 b to the new accommodation GW 2 b. (S1 b). The GW 2 b having received the registration instruction transmits an update instruction including identification information “UE # 1” and “GW # 2” included in the registration instruction to the Cont 1 (S 2 b). Cont1 having received the update instruction updates the control information based on the update instruction. FIG. 4B shows control information after the control information shown in FIG. 4A (the control information is assumed to have been stored in Cont 1) is updated based on the update instruction. As shown in FIG. 4 (b), the gateway apparatus accommodating the UE 3a is changed from the GW 2a to the GW 2b.

  Subsequently, Cont1 is information indicating that UE 3a is accommodated by GW 2b (for example, information of a set of identification information “UE # 1” and identification information “GW # 2” included in the update instruction received in S2a) ) Is sent to the GW 2 a and GW 2 d (only the adjacent GW 2) adjacent to the GW 2 b accommodating the moved UE 3 a (S 3 b). More specifically, in the control information of FIG. 8, Cont 1 is identification information “GW # 1” and “GW # 4” associated with identification information “GW # 2” included in the update instruction received in S 2 b. The update instruction is transmitted to the GW 2 a and the GW 2 d respectively indicated by The GW 2 a and GW 2 d having received the update instruction in S 3 b update the destination information based on the update instruction (the description is omitted because it is the same as in the first embodiment). The above is the description of the update notification in the second embodiment.

  About the processing of the packet transmission from UE3c which GW2c which is remote GW2 accommodates after the above-mentioned update notice, since it is the same as that of S1 '-S6' of Drawing 7 of a 1st embodiment, explanation is omitted.

Third Embodiment
FIG. 12 is a sequence diagram showing processing executed by the mobile network shown in FIG. 6 in the third embodiment. As a premise, it is assumed that Cont1 stores control information shown in FIG. 10 (a), and GW 2d stores destination information shown in FIG. 11 (a). As shown in FIG. 10A, the control information stored in Cont1 includes EID, which is identification information of UE3, and RLOC, which is identification information of GW2 accommodating the UE3 (indicating the location of UE3). including. The control information shown in FIG. 10A indicates that the GW 2 a accommodates the UE 3 a and the GW 2 d accommodates the UE 3 b. Further, as shown in FIG. 11A, the destination information stored in the GW 2 d is the identification information of the UE 3, that is, the EID that is identification information of the UE 3 and the identification information of the GW 2 that accommodates the UE 3 (indicating the location of the UE 3). And RLOC. The destination information shown in FIG. 11A indicates that the GW 2 a accommodates the UE 3 a.

  Steps S1c to S5c in FIG. 12 in which update notification is performed when the accommodation destination of the UE 3a is changed from the GW 2a to the GW 2b in accordance with the movement of the UE 3a will be described. After the UE 3a moves, the UE 3a transmits a registration instruction including the identification information “UE # 1” of its own terminal and the identification information “GW # 2” of the new accommodation GW2 b to the new accommodation GW 2 b. (S1c). Upon receiving the registration instruction, the GW 2 b transmits, to the Cont 1, an update instruction including identification information “UE # 1” and “GW # 2” included in the registration instruction (S 2 c). Cont1 having received the update instruction updates the control information based on the update instruction. FIG. 10B shows control information after the control information shown in FIG. 10A has been updated based on the update instruction. As shown in FIG. 10 (b), the gateway apparatus accommodating the UE 3a is changed from the GW 2a to the GW 2b.

  Subsequently, Cont1 transmits a request for inquiring the GW 2 in communication with the UE 3a to the UE 3a of the transmission source (S3c). The UE 3a having received the request transmits a response including identification information "GW # 1" and "GW # 4" of the GW 2 in communication with the UE 3a (S4c). More specifically, UE3a acquires the identification information of GW2 which has established the communication bearer now, for example, and transmits the reply containing the said identification information. The Cont1 having received the reply is, based on the received reply, information indicating that the UE 3a is accommodated by the GW 2b with respect to the GW 2a and GW 2d in communication with the UE 3a (for example, included in the update instruction received in S2a An instruction to update destination information including the identification information “UE # 1” and the identification information “GW # 2” is sent (S5 c). More specifically, the Cont 1 transmits an update instruction of the destination information to the GW 2 a and the GW 2 d respectively indicated by the identification information “GW # 1” and “GW # 4” included in the received answer. The GW 2 a and GW 2 d having received the update instruction in S 5 c update the destination information based on the update instruction (the description is omitted because it is the same as in the first embodiment). The above is the description of the update notification in the third embodiment.

Fourth Embodiment
FIG. 14 is a sequence diagram showing processing executed by the mobile network shown in FIG. 6 in the fourth embodiment. The fourth embodiment is the same as the third embodiment, and the main difference is that S3c and S4c in FIG. 12 in the third embodiment are replaced with S3d in FIG. 14 in the fourth embodiment. The difference will be described below.

  As a premise, it is assumed that Cont1 stores control information shown in FIG. As shown in FIG. 13A, the control information stored in Cont1 includes session information. The control information shown in FIG. 13A indicates that the UE 3a and the GW 2d have a session, and the UE 3b and the GW 2a have a session. The session information may be updated appropriately by Cont 1 when, for example, Cont 1 receives a communication request from UE 3. Further, the session information may be updated (deleted, expire) as required by Cont 1 based on a preset timer.

  After S2d of FIG. 14, Cont1 determines GW2a and GW2d as GW2 in communication with UE3a based on the control information. More specifically, Cont1 sets GW2a and GW2d respectively indicated by identification information “GW # 1” and “GW # 4” of GW2 included in the control information shown in FIG. 13A as GW2 in communication with UE 3a. decide. The process of S4 d after determination is the same as S5 c of FIG. 12 of the third embodiment. Subsequently, Cont1 updates the control information based on the update instruction received in S2d. FIG. 13B shows control information after the control information shown in FIG. 13A has been updated based on the update instruction. As shown in FIG. 13 (b), having a session with UE 3b is changed from GW 2a to GW 2b. The above is the description of the update notification in the fourth embodiment.

  Subsequently, the function of the Cont 1 (control device) in the first to fourth embodiments will be described in detail. FIG. 15 is a functional block diagram of Cont1. As shown in FIG. 15, Cont 1 includes an update instruction reception unit 10, a control information storage unit 11, a control information update unit 12, an update target determination unit 13, and an update instruction transmission unit 14.

  The update instruction reception unit 10 receives an update instruction from another node such as the GW 2 or the UE 3. Reception by the update instruction receiving unit 10 is as described above for the process after S2a in FIG. 7, the process after S2b in FIG. 9, the process after S2c in FIG. 12, and the process after S2d in FIG.

  The control information storage unit 11 stores control information. For example, the control information of FIGS. 8, 10 and 13 is stored by the control information storage unit 11.

  When the update instruction reception unit 10 receives the update instruction, the control information update unit 12 updates the control information stored by the control information storage unit 11 based on the received update instruction. The control information update instruction includes information necessary to update the control information. The control information update unit 12 updates the control information by the process after S2a in FIG. 7, the process after S2b in FIG. 9, the process after S2c in FIG. 12, and the process after S4d in FIG. is there.

  When the update instruction reception unit 10 receives an update instruction, the update target determination unit 13 determines, as the GW 2 that notifies of a change based on the received update instruction, some of the GWs 2 among the plurality of GW2s under control. The update target determination unit 13 may determine, as the GW 2 to notify of the change, the GW 2 that has accommodated the UE 3 before the change (first embodiment) or is adjacent to the GW 2 that accommodates the UE 3 after the change. The GW 2 may be determined (second embodiment), or the GW 2 in communication with the UE 3 may be determined (third and fourth embodiments). When determining the GW 2 in communication with the UE 3, the update target determination unit 13 inquires the UE 3 about the GW 2 in communication with the UE 3, and determines the GW 2 obtained by the inquiry as the GW 2 to notify of the change. You may (4th Embodiment). The determination of the GW 2 to be notified by the update target determination unit 13 is as described in the process of S3a of FIG. 7, the process of S3b of FIG. 9, the processes of S3c to S5c of FIG. 12, and the processes of S3d to S4d of FIG. It is.

  The update instruction transmission unit 14 notifies the change based on the update instruction received by the update instruction reception unit 10 to the GW 2 determined by the update target determination unit 13. The notification by the update instruction transmission unit 14 is as described for the process of S3a of FIG. 7, the process of S3b of FIG. 9, the process of S5c of FIG. 12, and the process of S4d of FIG.

  Note that the block diagram used in the description of the above embodiment shows blocks in units of functions. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.

  For example, Cont 1 and the like in one embodiment of the present invention may function as a computer that performs the processing shown in FIGS. 7, 9, 12 and 14. FIG. 16 is a diagram illustrating an example of a hardware configuration of Cont1. Cont1 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like.

  In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of Cont 1 may be configured to include one or more of the devices illustrated in the figure, or may be configured without some devices.

  Each function in Cont 1 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, etc., communication by the communication device 1004, and data in the memory 1002 and the storage 1003. This is realized by controlling the reading and / or writing of

  The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the update instruction reception unit 10, the control information update unit 12, the update target determination unit 13, the update instruction transmission unit 14 and the like described above may be realized by the processor 1001.

  Also, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the update instruction reception unit 10, the control information storage unit 11, the control information update unit 12, the update target determination unit 13, and the update instruction transmission unit 14 are stored in the memory 1002 and realized by a control program operated by the processor 1001. It may be realized for other functional blocks as well. The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

  The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 can store a program (program code), a software module, etc. which can be executed to perform the processing shown in FIGS. 7, 9, 12 and 14.

  The storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the update instruction reception unit 10, the control information update unit 12, the update target determination unit 13, the update instruction transmission unit 14, and the like may be realized by the communication device 1004.

  The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

  In addition, devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses among the devices.

  The GW 2 a is configured to include hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), and field programmable gate array (FPGA). Some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.

  Next, the function and effect of the Cont 1 configured as in the present embodiment will be described.

  Cont1 of the present embodiment manages a plurality of GW2s, and when a change regarding UE3 accommodated by the GW2 is notified, determines a part GW2 among the plurality of GW2s under the control as the GW2 notifying of the change, The change is notified to the determined GW2. According to such Cont1, when a change related to the UE 3 accommodated by the GW 2 is notified, the change is notified to some GWs 2 among the plurality of GWs 2 subordinate thereto. That is, since the change is not notified to all of the plurality of subordinate GWs 2 and the change is notified to some of the GWs 2, it is possible to reduce the signaling cost of the entire network.

  Further, as in the first embodiment, the Cont 1 of the present embodiment may determine the GW 2 that has accommodated the UE 3 before the change as the GW 2 that notifies of the change. As a result, it is possible to achieve both the reduction of the signaling cost of the entire network involved in the movement of the UE 3 in the near-end terminal communication and the prevention of the communication delay caused by the communication disconnection. Also, the signaling cost of the adjacent GW 2 can be reduced.

  Further, as in the second embodiment, the Cont1 of the present embodiment may determine the GW2 adjacent to the GW2 accommodating the UE3 after the change as the GW2 for notifying the change. As a result, it is possible to achieve both the reduction of the signaling cost of the entire network involved in the movement of the UE 3 in the near-end terminal communication and the prevention of the communication delay caused by the communication disconnection.

  Further, as in the third embodiment, the Cont 1 of the present embodiment may determine the GW 2 in communication with the UE 3 as the GW 2 for notifying of the change. Thereby, the signaling cost of the whole network accompanying UE3 movement of communication between terminals can be reduced. In addition, since the destination information of the transmission source can be rewritten by the C-Plane (control) signal triggered by the movement of UE3, the communication delay of the existing technology reduced by the arrival of the U-Plane packet at GW2 before the movement is reduced can do.

  Further, as in the fourth embodiment, the Cont1 of the present embodiment may inquire the UE 3 about the GW 2 currently in communication with the UE 3 and determine the GW 2 obtained by the inquiry as the GW 2 to be notified of the change. Thereby, the signaling cost of the whole network accompanying UE3 movement of communication between terminals can be reduced. In addition, since the destination information of the transmission source can be rewritten by the C-Plane (control) signal triggered by the movement of the UE 3, the communication delay of the existing technology reduced by the arrival of the U-Plane packet at the GW2 before the movement is reduced. can do.

  As mentioned above, although this embodiment was described in detail, it is clear for persons skilled in the art that this embodiment is not limited to the embodiment described in this specification. This embodiment can be implemented as a modification and a change mode, without deviating from the meaning and range of the present invention which become settled by statement of a claim. Therefore, the description of the present specification is for the purpose of illustration and does not have any limitation on the present embodiment.

  The notification of information is not limited to the aspects / embodiments described herein, and may be performed in other manners. For example, notification of information may be physical layer signaling (eg, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (eg, Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Also, RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

  Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band), The present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.

  As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

  The specific operation that is supposed to be performed by the base station in this specification may be performed by its upper node in some cases. In a network of one or more network nodes with a base station, the various operations performed for communication with the terminals may be the base station and / or other network nodes other than the base station (eg, It is clear that it may be performed by MME or S-GW etc but not limited to these). Although the case where one other network node other than a base station was illustrated above was illustrated, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

  Information and the like may be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input and output may be performed via a plurality of network nodes.

  The input / output information or the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information to be input or output may be overwritten, updated or added. The output information etc. may be deleted. The input information or the like may be transmitted to another device.

  The determination may be performed by a value (0 or 1) represented by one bit, may be performed by a boolean value (Boolean: true or false), or may be compared with a numerical value (for example, a predetermined value). Comparison with the value).

  Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution. In addition, notification of predetermined information (for example, notification of "it is X") is not limited to what is explicitly performed, but is performed by implicit (for example, not notifying of the predetermined information) It is also good.

  Although the present invention has been described above in detail, it is apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

  Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.

  Also, software, instructions, etc. may be sent and received via a transmission medium. For example, software may use a wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

  The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips etc that may be mentioned throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of

  The terms described in the present specification and / or the terms necessary for the understanding of the present specification may be replaced with terms having the same or similar meanings. For example, the channels and / or symbols may be signals. Also, the signal may be a message. Also, the component carrier (CC) may be called a carrier frequency, a cell or the like.

  The terms "system" and "network" as used herein are used interchangeably.

  In addition, the information, parameters, and the like described in the present specification may be represented by absolute values, may be represented by relative values from predetermined values, or may be represented by corresponding other information. . For example, radio resources may be indexed.

  The names used for the parameters described above are in no way limiting. In addition, the formulas etc. that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg PUCCH, PDCCH etc.) and information elements (eg TPC etc.) can be identified by any suitable names, the various names assigned to these various channels and information elements can be Is not limited.

  A base station can accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station RRH for indoor use: Remote Communication service can also be provided by Radio Head. The terms "cell" or "sector" refer to a part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage. Furthermore, the terms "base station" "eNB", "cell" and "sector" may be used interchangeably herein. A base station may be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), femtocell, small cell, and the like.

  The mobile station may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, by those skilled in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.

  The terms "determining", "determining" as used herein may encompass a wide variety of operations. "Judgment", "decision" are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc. Also, "determination" and "determination" are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”. Also, "judgement" and "decision" are to be considered as "judgement" and "decision" that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing), etc. May be included. That is, "judgment" "decision" may include considering that some action is "judged" "decision".

  The terms "connected", "coupled" or any variants thereof mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled”. The coupling or connection between elements may be physical, logical or a combination thereof. As used herein, the two elements are by using one or more wires, cables and / or printed electrical connections, and radio frequency as some non-limiting and non-exclusive examples. It can be considered "connected" or "coupled" to one another by using electromagnetic energy such as electromagnetic energy having wavelengths in the region, microwave region and light (both visible and invisible) regions.

  As used herein, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

  As long as “including”, “comprising”, and variations thereof are used in the present specification or claims, these terms as well as the term “comprising” are inclusive. Intended to be Further, it is intended that the term "or" as used in the present specification or in the claims is not an exclusive OR.

  Throughout the present disclosure, when articles are added by translation, such as a, an and the in English, for example, these articles are plural unless the context clearly indicates otherwise. Shall be included.

  1 ... Cont, 2 2a 2b 2c 2d 2e GW, 3 3a 3b 3c ... UE 10 update instruction receiving unit 11 control information storage unit 12 control information updating unit 13 ... update target determination unit, 14 ... update instruction transmission unit.

Claims (5)

A control device that manages a plurality of gateway devices,
When a change regarding a terminal accommodated by the gateway apparatus is notified, a part of the gateway apparatuses is determined as a gateway apparatus that notifies the change, and the change is notified to the determined gateway apparatus, control apparatus.   The control device according to claim 1, wherein the gateway device that has accommodated the terminal before the change is determined as the gateway device that notifies of the change.   The control device according to claim 1, wherein the control device is configured to determine a gateway device adjacent to the gateway device accommodating the terminal after the change as the gateway device notifying of the change.   The control device according to claim 1, wherein the gateway device that is in communication with the terminal is determined as the gateway device that notifies of the change. 5. The control device according to claim 4, wherein the control device inquires of the terminal about a gateway device in communication with the terminal, and determines the gateway device obtained by the inquiry as a gateway device to notify of a change.

Images