COMMUNICATION CONTROL DEVICE AND COMMUNICATION CONTROL METHOD

Abstract

The purpose is to reduce the network load by setting data transmission paths for each user terminal group. [Solution] The mobile terminal device includes an acquisition unit 11 that acquires past location information of each of the multiple user terminals 2 based on location information of each user terminal 2 associated with a location registration request signal transmitted from each of the multiple user terminals 2; a calculation unit 14 that receives the past location information of each of the multiple user terminals 2 as an unknown input, performs calculations on a trained recurrent neural network, and outputs future location information of each of the multiple user terminals 2; a first determination unit 16 that determines, based on the future location information of each of the multiple user terminals 2 output by the calculation unit 14, that a user terminal group 20 among the multiple user terminals 2 having matching future location information are a user terminal group 20 moving along the same route; and a communication control unit 18 that instructs the core network to set up the same data transmission path for the user terminal group 20.

Description

[Technical field]

[0001] The present invention relates to a communication control device and a communication control method. [Background technology]

[0002] In recent years, the number of mobile communication service subscribers has been rapidly increasing due to an increase in the number of IoT terminals in addition to mobile phones. While the number of mobile communication service subscribers is increasing, handover control of these user terminals is performed for each user terminal (see Patent Document 1). In addition, when handover control is performed to switch from the base station where the user terminal is located to the base station of the destination, a user plane (U-plane) setting process is performed for each user terminal, and a data transmission path is provided. This allows the user terminal to seamlessly connect to the base station of the destination and perform continuous data communication.

[0003] In conventional U-plane settings performed during handover control, even when there were a group of user terminals moving along the same route, the U-plane settings had to be updated for each user terminal, which complicated resource management and increased network load. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-182711 A Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional technology, it was not possible to set up data transmission paths for each group of user terminals, making it difficult to suppress the network load.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to reduce the network load by setting data transmission paths for each user terminal group. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the communication control device of the present invention includes an acquisition unit configured to acquire past location information of each of a plurality of user terminals based on location information of each user terminal associated with a location registration request signal transmitted from each of the plurality of user terminals; a calculation unit configured to provide the past location information of each of the plurality of user terminals as an unknown input, perform calculations of a trained recurrent neural network, and output future location information of each of the plurality of user terminals; a first determination unit configured to determine, based on the future location information of each of the plurality of user terminals output by the calculation unit, that a group of user terminals among the plurality of user terminals having the same future location information are a group of user terminals moving along the same route; and a communication control unit that instructs a core network to set up the same data transmission path for the group of user terminals.

[0008] In addition, the communication control device of the present invention may further include a learning unit configured to learn a recurrent neural network that outputs future location information of the user terminal when past location information of the user terminal is given as input using a history of location information of the user terminal as teacher data, and a first memory unit configured to store the trained recurrent neural network constructed by the learning unit, and the calculation unit may read out the trained recurrent neural network stored in the first memory unit and perform calculations.

[0009] In addition, in the communication control device of the present invention, the location information of each user terminal associated with the location registration request signal is associated with information of a base station in a communication area covering the location indicated by the location information, and the communication control unit is further configured to store route information including information of the communication areas of a series of base stations indicating a route along which the group of user terminals will move, and the communication control unit may instruct the core network to update the settings of each user terminal of the user terminal group to the settings of a data transmission path associated with the destination base station based on the route information before each user terminal of the user terminal group crosses the communication area of ​​the destination base station.

[0010] In addition, in the communication control device of the present invention, a second determination unit is further configured to determine whether each user terminal of the user terminal group has crossed the communication area of ​​the destination base station from location information of each user terminal associated with a location registration request signal transmitted from each user terminal of the user terminal group based on the route information, and when the second determination unit determines that each user terminal of the user terminal group has crossed the communication area of ​​the destination base station, the communication control unit may issue an instruction to the core network to each user terminal of the user terminal group to perform data communication via the updated data transmission path.

[0011] In order to solve the above-mentioned problems, the communication control method of the present invention includes an acquisition step of acquiring past location information of each of a plurality of user terminals based on location information of each user terminal associated with a location registration request signal transmitted from each of the plurality of user terminals; a calculation step of providing the past location information of each of the plurality of user terminals as an unknown input, performing calculations of a trained recurrent neural network, and outputting future location information of each of the plurality of user terminals; a first determination step of determining, based on the future location information of each of the plurality of user terminals output in the calculation step, that a group of user terminals among the plurality of user terminals having the same future location information are a group of user terminals moving along the same route; and a communication control step of instructing a core network to set up the same data transmission path for the group of user terminals.

[0012] In addition, the communication control method of the present invention may further include a learning step of learning a recurrent neural network that outputs future location information of the user terminal when past location information of the user terminal is given as input using a history of location information of the user terminal as teacher data, and a first storage step of storing the trained recurrent neural network constructed in the learning step in a first storage unit, and the calculation step may read out the trained recurrent neural network stored in the first storage unit and perform calculations.

[0013] Furthermore, in the communication control method of the present invention, the location information of each user terminal associated with the location registration request signal is associated with information on base stations in a communication area that covers the location indicated by the location information, and the method further includes a second storage step of storing route information in a second storage unit, the route information including information on the communication areas of a series of base stations, which indicates a route along which the group of user terminals will move, and the communication control step may instruct the core network to update the settings of each user terminal of the user terminal group to the settings of a data transmission path associated with the destination base station based on the route information before each user terminal of the user terminal group crosses the communication area of ​​the destination base station.

[0014] In addition, the communication control method of the present invention further includes a second determination step of determining whether or not each user terminal of the user terminal group has crossed the communication area of ​​the destination base station from location information of each user terminal associated with a location registration request signal transmitted from each user terminal of the user terminal group based on the route information, and when the second determination step determines that each user terminal of the user terminal group has crossed the communication area of ​​the destination base station, the communication control step may issue an instruction to the core network to each user terminal of the user terminal group to perform data communication via the updated data transmission path. Effect of the Invention

[0015] According to the present invention, based on the future location information of each of the multiple user terminals obtained by performing the calculation of the trained recurrent neural network, a group of user terminals that move along the same route is determined from the multiple user terminals, and an instruction is given to the core network to set up the same data transmission path for the user terminal group. Therefore, the data transmission path is set up for each user terminal group, and the network load can be reduced. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a block diagram showing a configuration of a communication control system including a communication control device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram for explaining the second storage unit included in the communication control device according to the present embodiment. [Diagram 3] FIG. 3 is a diagram for explaining the second storage unit included in the communication control device according to the present embodiment. [Figure 4] FIG. 4 is a diagram for explaining the learning unit included in the communication control device according to the present embodiment. [Diagram 5] FIG. 5 is a diagram for explaining the learning unit included in the communication control device according to the present embodiment. [Figure 6]FIG. 6 is a block diagram showing a hardware configuration of the communication control device according to the present embodiment. [Figure 7] FIG. 7 shows an operation sequence of the communication control system according to the present embodiment. [Figure 8] FIG. 8 is a flowchart showing the operation of the communication control device according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to FIGS.

[0018] [Communication control system configuration] First, with reference to FIG. 1, an overview of a communication control system including a communication control device 1 according to an embodiment of the present invention will be described.

[0019] The communication control system according to the present embodiment is provided in a 5G mobile communication network, and includes a communication control device 1, a plurality of user terminals 2, a base station 3, a core network 4, and a data network (DN) 5. The communication control device 1 and the core network 4 are connected to each other so as to be able to communicate with each other via a communication network NW such as a LAN, a WAN, or the Internet. The plurality of user terminals 2 can communicate with the core network 4 via the 5G mobile communication network.

[0020] The communication control system according to this embodiment collectively issues to the core network 4 an instruction to set up the U-plane for a group of user terminals 20 among a plurality of user terminals 2 that perform mobile communication while moving along the same route.

[0021] The user terminal 2 includes an SIM 2a and is realized as a mobile communication terminal such as a smartphone, a tablet computer, a laptop computer, or the like. The contract profile of the SIM 2a stores the subscriber identification information of the user, and includes identifier information such as an International Mobile Subscriber Identity (IMSI) number assigned to a mobile phone line contract, a telephone number of the subscriber user (Mobile Subscriber International Subscriber Directory Number (MSISDN)), and a SIM card number (Integrated Circuit Card Identifier (ICCID)). The user terminal 2 is uniquely identified by the IMSI of the SIM 2a.

[0022] The user terminal 2 can be configured as an IoT device, and in this case, a terminal IP address that uniquely identifies the terminal is assigned. Furthermore, the user terminal 2 includes a GPS chip, receives signals from GPS satellites, and calculates the position of the own device. In this embodiment, there are multiple user terminals 2. Among the multiple user terminals 2, user terminals that perform mobile communication while moving as a group along the same moving route are referred to as a user terminal group 20.

[0023] The user terminal 2 transmits a location registration request signal to the core network 4 via the base station 3 when powered on, periodically, or when crossing from the communication area A of the base station 3 from which the user terminal 2 moves to the communication area A of the base station 3 from which the user terminal 2 moves. The location registration request signal passes through the base station 3, the AMF 40, and the UDM 41 and is received by a UDR 10 (described later) provided in the communication control device 1. The location registration request signal includes information such as the IMSI of the user terminal 2, and the cell ID and location area code of the communication area A of the base station 3 in which the user terminal 2 is located. Furthermore, in this embodiment, the GPS position is associated with the location information of the user terminal 2.

[0024] Each of the communication areas A1 to An (n is a positive integer equal to or greater than 2) of the multiple base stations 3 is made up of unit areas obtained by dividing the area of ​​each area. A corresponding GPS position value is registered in advance for each unit area. In this embodiment, the GPS position of the user terminal 2 coincides with the GPS position of any of the unit areas included in any of the communication areas A1 to An. Therefore, it is possible to identify the communication area A1 to An of the base station 3 in which the user terminal 2 is located from the GPS position of the user terminal 2.

[0025] The base station 3 is composed of a wireless base station compatible with the 5G communication standard, and relays communications between the user terminal 2 present in the communication area A and the core network 4. The base station 3 is connected to the core network 4 via a backhaul link. There are n base stations 3 (n is a positive integer of 2 or more), and as described above, the communication areas A1 to An covered by each base station 3 can be understood as a collection of GPS positions of unit areas.

[0026] The core network 4 includes an Access and Mobility Management Function (AMF) 40, a Unified Data Management (UDM) 41, a Session Management Function (SMF) 42, which are nodes in the C-plane, and a User Plane Function (UPF) 43 in the U-plane. Note that other functions such as a Policy Control Function (PCF) included in the core network 4 are not shown in the figure. The functional nodes of the core network 4 are connected by an IP network.

[0027] The AMF 40 is an access and mobility management device that manages and controls handovers such as registration and wireless connection of user terminals 2 that have moved to each communication area A. During handover, the AMF 40 manages the location information of the user terminals 2 and selects an appropriate new base station 3.

[0028] The UDM 41 stores and manages subscriber information, location information of the user terminal 2, session information, and authentication information.

[0029] The SMF 42 is a session management function, and performs the establishment, modification, release, etc. of PDU (Packet Data Unit) sessions between the user terminal 2 and a data network 5 such as the Internet. The SMF 42 resets the session and updates the UPF 43 at the time of handover. The SMF 42 also instructs the new UPF 43 to update or create a new session. In this embodiment, in response to an instruction from the communication control device 1, the SMF 42 sets or updates the UPF 43 for each user terminal group 20 moving along the same route, and sets up a data transmission path for data communication.

[0030] The UPF 43 is a user plane function of the core network 4, and processes data packets between the base station 3 and the data network 5. The UPF 43 sets up a new path during handover and ensures continuity of data communication.

[0031] A data network (DN) 5 is the Internet or the like outside the core network, and the user terminal 2 connects to the data network (DN) 5 via the UPF 43 of the core network 4 wirelessly.

[0032] In the communication control system according to the present embodiment, a user carrying a user terminal 2 travels on a means of transportation U, such as a train or bus, that operates along a known travel route within a communication area A. Thus, user terminals 2 traveling along the same route travel as a group, at the same time, at the same speed, and located within a relatively small range. Location information from a starting point S to a destination point G of the travel route is known, and is specified as, for example, communication areas A1, A2, ..., A10 of a series of base stations 3.

[0033] The communication control system provides the GPS position of each user terminal 2 associated with the location registration request signal transmitted by the multiple user terminals 2, i.e., the past GPS position, as an unknown input to a trained recurrent neural network, and determines a user terminal group 20 that has the same moving route from among the multiple user terminals 2 based on the future GPS position that is output. Furthermore, before the user terminal group 20 moves along the moving route from the communication area A1 of the origin base station 3 where it is located to the communication area A2 of the destination base station 3, an instruction to update the U-plane setting is given in advance for each user terminal group 20.

[0034] [Function block of communication control device] As shown in FIG. 1, the communication control device 1 includes a UDR 10, an acquisition unit 11, a learning unit 12, a first memory unit 13, a calculation unit 14, a second memory unit 15, a first judgment unit 16, a second judgment unit 17, and a communication control unit 18.

[0035] A UDR (Unified Data Repository) 10 stores a subscriber profile that holds the IMSI and location information of the user terminal 2. The UDR 10 receives a location registration request signal that is transmitted from the user terminal 2 and passes through the base station 3 and the AMF 40 and UDM 41 of the core network 4. The location registration request signal received by the UDR 10 specifies a transmission timestamp, cell ID, and GPS location for each IMSI. Note that the UDR 10 may be configured to be provided outside the communication control device 1 as long as it is communicably connected to the communication control device 1 and can transmit this information to the communication control device 1.

[0036] The acquisition unit 11 acquires past location information of each of the multiple user terminals 2 based on the location information of each user terminal 2 associated with a location registration request signal transmitted from each of the multiple user terminals 2. The acquisition unit 11 acquires the IMSI of the user terminal 2, a transmission timestamp of the location registration request signal, a cell ID, and a GPS position from the UDR 10. The acquisition unit 11 can obtain past location information of the user terminal 2 from the GPS position for each transmission timestamp or by generating a GPS position for each fixed period. The acquisition unit 11 can acquire past location information of the user terminal 2 related to unknown input used by the calculation unit 14, and a history of location information of the user terminal 2 related to teacher data used in learning by the learning unit 12.

[0037] The learning unit 12 uses the history of the location information of the user terminal 2 as teacher data to learn a recurrent neural network (RNN) that outputs future location information of the user terminal 2 when past location information of the user terminal 2 is given as input. Specifically, the learning unit 12 uses the GPS location history of the multiple user terminals 2 acquired by the acquisition unit 11, that is, a time series sequence in which the GPS location at each subsequent time is assigned as a correct answer label to the GPS location value for each time, as teacher data for the RNN. In this way, the learning unit 12 learns the patterns of the movement routes of the multiple user terminals 2 using the RNN.

[0038] 4 is a schematic diagram showing the network structure of the RNN used in the learning of the learning unit 12. As shown in FIG. 4, the RNN is a neural network consisting of an input layer X, a hidden layer H which is a memory cell, and an output layer Y. The input time series data x (t) Predict time series data from y (t)In this embodiment, the input time series data is the GPS position of the user terminal 2 at each past time, that is, the value of the GPS position of the user terminal 2 at the transmission timestamp when the location registration request signal is transmitted, or the value of the GPS position during the sampling period by the acquisition unit 11. The predicted time series data is the GPS position of the user terminal in the future, that is, the GPS position of the user terminal 2 at each next time. In the RNN, information is transmitted from the hidden layer at a certain time to the hidden layer at the next time along the time series. Therefore, the hidden layer at time t receives input from the hidden layer at time t and the hidden layer at the immediately preceding time t-1.

[0039] Given a time series data x (t) On the other hand, the RNN is defined by the following equations (1) and (2). h (t) =σ(U×x (t) +W×h (t-1) +b) (1) y (t) = V × h (t) +c...(2)

[0040] The above equation (1) represents the propagation from the input layer to the hidden layer, and x (t) is the input vector at time t. (t) is the output of the hidden layer at time t. U is the weight parameter from the input to the hidden layer, W is the weight parameter from the hidden state at the previous time t-1 to the hidden state at the current time t. b is the bias vector of the hidden layer, and σ is the activation function.

[0041] The above equation (2) represents the propagation from the hidden layer to the output layer, and y (t) is the output vector at time t. V is the weight parameter from the hidden layer to the output layer, and c is the bias vector for the output layer.

[0042] Fig. 5 is a diagram showing a schematic diagram of a multi-stage neural network configuration of an RNN used by the learning unit 12. As shown in Fig. 5, the GPS position of the user terminal 2 for each time step t1_1, . . . , t_D is input to each node of the input layer X. In the hidden layer H, a repeated process in which the output at each time step is given as the input for the next time step is performed, and a predicted value of the location information of the destination point is output from the output layer Y.

[0043] The learning unit 12 uses an error backpropagation method or the like to compare the obtained predicted output value with the output value of the teacher data for a given input value, introduces an objective function that minimizes the error, checks the error of the weight parameters and propagates it backward, and finally determines the weight parameters U, W, V and the biases b and c. Through such a learning process, the learning unit 12 constructs a trained RNN. The trained RNN is stored in the first storage unit 13.

[0044] The first storage unit 13 stores the trained RNN.

[0045] The calculation unit 14 receives past location information of each of the multiple user terminals 2 as an unknown input, performs calculations on the trained RNN, and outputs future location information of each of the multiple user terminals 2. The calculation unit 14 reads out the trained RNN from the first storage unit 13 and performs calculation processing. The input used by the calculation unit 14 is the GPS location history of the multiple user terminals 2 acquired by the acquisition unit 11.

[0046] The second storage unit 15 stores route information including information on the communication areas A of a series of base stations 3 indicating the route along which the user terminal group 20 moves. FIG. 2 and FIG. 3 are diagrams for explaining the structure of the second storage unit 15. FIG. 2 is a table 150A in which the GPS positions of the areas covered by each cell ID of the base station 3 are stored. The value of each GPS position represents the GPS position of each unit area in the communication area A of FIG. 1. FIG. 3 is a table 150B of route information in which the ID of the user terminal group 20 is associated with the movement route. It is shown that the user terminal group 20 with ID "1" uses the communication areas A1 to A10 specified by each GPS position in the table 150A as its movement route. The route information makes it possible to specify which communication area A of the destination base station 3 the user terminal group 20 will move to from the communication area A of the base station 3 in which the user terminal group 20 is present.

[0047] The first determination unit 16 determines, based on the future position information of each of the multiple user terminals 2 output by the calculation unit 14, that among the multiple user terminals 2, the user terminal group 20 having the same future position information are the user terminal group 20 moving along the same route. For example, the first determination unit 16 can determine that the user terminals 2 within a certain range, such as those whose future GPS positions are offset by within 3 m from each other, are the user terminal group 20 moving along the same route. Furthermore, based on the route information stored in the second storage unit 15, the first determination unit 16 can identify which of the previously registered moving routes the user terminals 20 moving along the same route belong to.

[0048] The second determination unit 17 determines whether each user terminal 2 of the user terminal group 20 has crossed the communication area A of the destination base station 3 based on the location information of each user terminal 2 associated with the location registration request signal transmitted from each user terminal 2 of the user terminal group 20 based on the route information. The second determination unit 17 refers to the route information stored in the second storage unit 15, and identifies the communication area A of the current base station 3 from the current GPS position of each user terminal 2 of the user terminal group 20 based on the communication areas A1 to A10 of a series of base stations 3 registered in advance. Furthermore, the second determination unit 17 can obtain information on the communication area A of the next base station 3 to move to from the information on the communication area A of the current base station 3. The second determination unit 17 determines the movement to the communication area A of the destination base station 3 from the GPS position using the IMSI of each user terminal 2 of the user terminal group 20 as a key in the location registration request signal received by the UDR 10.

[0049] The communication control unit 18 instructs the core network 4 to set the same data transmission path for the user terminal group 20. More specifically, based on the route information stored in the second storage unit 15, when each user terminal 2 of the user terminal group 20 crosses the communication area A of the destination base station 3, the communication control unit 18 instructs the core network 4 to update the setting of the data transmission path for each user terminal 2 of the user terminal group 20 to that associated with the destination base station 3.

[0050] The communication control unit 18, based on information on the communication area A1 in which the user terminal group 20 is located, refers to the route information and specifies the base station 3 in the destination communication area A2 for the core network 4. Then, before the user terminal group 20 moves to the destination communication area A2, the communication control unit 18 instructs the core network 4 to update the UPF 43 according to the destination base station 3 by U-plane setting processing in advance. Specifically, the communication control unit 18 instructs the SMF 42 to change the setting of the user terminal group 20 to the UPF 43 according to the destination base station 3. The SMF 42 performs U-plane setting processing in response to the instruction from the communication control unit 18.

[0051] [Hardware configuration of communication control device] Next, an example of a hardware configuration for realizing the communication control device 1 having the above-mentioned functions will be described with reference to FIG.

[0052] As shown in FIG. 6, the communication control device 1 can be realized, for example, by a computer having a processor 102, a main memory device 103, a communication interface 104, an auxiliary memory device 105, and an input / output (I / O) 106 connected via a bus 101, and a program that controls these hardware resources.

[0053] The processor 102 is realized by a CPU, a GPU, an FPGA, an ASIC, or the like.

[0054] Programs for the processor 102 to perform various controls and calculations are stored in advance in the main memory device 103. The processor 102 and the main memory device 103 realize the functions of the communication control device 1, such as the acquisition unit 11, the learning unit 12, the calculation unit 14, the first determination unit 16, the second determination unit 17, and the communication control unit 18 shown in FIG.

[0055] The communication interface 104 is an interface circuit for network connection between the communication control device 1 and various external electronic devices.

[0056] The auxiliary storage device 105 is composed of a readable / writable storage medium and a drive for reading and writing various information such as programs and data from and to the storage medium. The auxiliary storage device 105 can use a semiconductor memory such as a hard disk or a flash memory as the storage medium.

[0057] The auxiliary storage device 105 has a program storage area for storing a communication control program executed by the communication control device 1. The auxiliary storage device 105 also has an area for storing a learning program for learning the RNN. The auxiliary storage device 105 realizes the UDR 10, the first storage unit 13, and the second storage unit 15 described in FIG. 1. Furthermore, the auxiliary storage device 105 may have, for example, a backup area for backing up the above-mentioned data and programs.

[0058] The input / output I / O 106 is an input / output device that inputs signals from an external device and outputs signals to an external device.

[0059] The display device 107 is configured by an organic EL display, a liquid crystal display, or the like.

[0060] [Operation of communication control system] Next, the operation of the communication control system including the communication control device 1 having the above-described configuration will be described with reference to the sequence diagram of FIG.

[0061] First, the user terminal 2 moves into the communication area A1 and performs data communication via the base station 3 (step S100). Next, the user terminal 2 transmits a location registration request signal to the UDR 10 of the communication control device 1 via the base station 3 in the communication area A1, the AMF 40, and the UDM 41 (step S101). The location registration request signal includes the IMSI and cell ID of the user terminal 2, and is further associated with a detailed GPS position of the user terminal 2 in the communication area A1.

[0062] Thereafter, UDR 10 cooperates with UDM 41 to execute location registration processing in response to the received location registration request signal, and if the location registration processing is successful, stores location registration information related to the IMSI of the user terminal 2 (step S102). In step S102, UDR 10 provides the location registration information to UDM 41, and UDM 41 returns the location registration information to the AMF. Furthermore, AMF 40 transmits a location registration response to the user terminal 2.

[0063] Next, the acquisition unit 11 of the communication control device 1 acquires the past GPS position of each of the multiple user terminals 2 based on the GPS position of each user terminal 2 associated with the location registration request signal transmitted from each of the multiple user terminals 2 received by the UDR 10 (step S103). The past GPS position is a history of the GPS position of each of the multiple user terminals 2, and is the GPS position for each transmission timestamp of the location registration request signal or for each fixed period sampled in advance, that is, for each time step. The past GPS positions also include the current GPS position.

[0064] Next, the calculation unit 14 reads out the trained RNN stored in the first storage unit 13, provides the past GPS position of the user terminal 2 acquired in step S103 as an unknown input, performs calculations on the trained RNN, and outputs the future GPS position of the user terminal 2 (step S104). In step S104, the future GPS position of each of the multiple user terminals 2 is obtained.

[0065] Next, the first determination unit 16 determines, based on the future position information of each of the multiple user terminals 2 output by the calculation unit 14 in step S104, that among the multiple user terminals 2, the user terminals 20 having the same future GPS position are the user terminals 20 moving along the same route (step S105). Also, in step S105, the first determination unit 16 can specify, based on the route information stored in the second storage unit 15, which of the previously registered moving routes the user terminals 20 moving along the same route are on.

[0066] Next, the communication control unit 18 instructs the core network 4 to set the same data transmission path for the user terminal group 20 (step S106). Specifically, the communication control unit 18 instructs the SMF 42 to set the U-plane in advance in the destination base station 3 for the IMSI of the user terminal group 20. Next, the core network 4 performs U-plane setting processing according to the U-plane setting procedure specified in the standard specification of 3GPP TS 23.502 (step S107). In step S107, in response to the collective instruction for the IMSI group, the AMF 40, the SMF 42, and the UPF 43 establish, change, and release the PDU session. Specifically, the SMF 42 selects the UPF 43 of the destination base station 3 and applies the change.

[0067] Next, UPF 43 receives an instruction from SMF 42, sets up a PDU session, configures a data transmission path for transferring data, and determines a transfer route to configure the U-plane (step S108). Furthermore, UPF 43 transmits information on the configured data transmission path to SMF 42 as a U-plane configuration completion notification (step S109). In step S109, SMF 42 further transmits a U-plane configuration completion notification to the communication control device 1.

[0068] Next, the second determination unit 17 of the communication control device 1 determines whether or not the user terminal 2 has crossed the communication area A2 of the destination base station 3 from the GPS position associated with the position registration request signal of the user terminal group 20 received by the UDR 10 based on the route information stored in the second storage unit 15 (step S110). If it is determined in step S110 that the user terminal 2 has crossed the communication area A2, the communication control unit 18 instructs the SMF 42 to start data communication (step S111). Furthermore, in step S111, the SMF 42 instructs the UPF 43 to start data communication.

[0069] Thereafter, the user terminal 2 starts data communication via the updated UPF 43 and the base station 3 of the destination communication area A2 (step S112). Next, the communication control unit 18 instructs the SMF 42 to delete the data transfer route used for data communication via the base station 3 of the source communication area A1 (step S113). In step S113, the SMF 42 further instructs the UPF 43 to delete the old data transfer route. Thereafter, the UPF 43 of the old UPF releases and deletes the data transmission path and related sessions, thereby deleting the old U-plane setting (step S114).

[0070] Through the above processing, the user terminal group 20 that have the same movement route are determined, and the U-plane configuration processing can be performed in advance for each user terminal group 20 before the user terminal group 20 moves to the communication area A of the destination base station 3.

[0071] Next, the learning process performed by the communication control device 1 will be described with reference to the flowchart in FIG.

[0072] First, the acquisition unit 11 acquires GPS position history of a plurality of user terminals 2 as teacher data (step S10). Specifically, the acquisition unit 11 can acquire GPS position history associated with position registration request signals received by the UDR 10 from a plurality of user terminals 2 as teacher data.

[0073] Next, the learning unit 12 learns the RNN (step S11). More specifically, the learning unit 12 learns an RNN that outputs the GPS position of the user terminal 2 at each subsequent time when the GPS positions of the user terminal 2 are sequentially inputted using the GPS position history, i.e., the time series, of the user terminal 2 acquired in step S10 as teacher data. In step S11, the RNN is learned using the history of each of the multiple user terminals 2.

[0074] In step S12, the learning unit 12 uses an error backpropagation method or the like to compare the obtained predicted output value with the output value of the teacher data for the given input value, introduces an objective function that minimizes the error, checks the error of each weight parameter and propagates it backward, and finally determines the weight parameters U, W, V and biases b and c in the above equations (1) and (2). The first storage unit 13 stores the trained RNN constructed in the learning process of step S12 (step S12).

[0075] By the above processes from step S10 to step S12, a trained RNN that has learned the movement route patterns of a plurality of user terminals 2 is constructed.

[0076] As described above, the communication control device 1 according to this embodiment uses an RNN to learn the patterns of the movement routes of multiple user terminals 2 based on the location information of the user terminal 2 associated with the location registration request signal. Therefore, when multiple user terminals 2 move by means of transportation such as public transportation with a fixed movement route, it is possible to determine a user terminal group 20 that moves along the same route. Therefore, the settings of the data transmission path are updated for each user terminal group 20, and the network load can be reduced.

[0077] Furthermore, according to the communication control device 1 of this embodiment, the user terminals 20 that move along the same route are determined by the learned RNN, and therefore, the effect of compressing the database can be obtained.

[0078] Furthermore, according to the communication control device 1 of this embodiment, since the user terminal group 20 moving along the same route is identified, the U-plane can be set in advance for the user terminal group 20 before the user terminal group 20 arrives at the communication area A of the destination base station 3. Therefore, the U-plane setting update process can be performed more efficiently in the handover control.

[0079] In the embodiment described above, the learning unit 12 learns an RNN. However, the learning unit 12 can also perform learning using a Long short-term memory (LSTM).

[0080] In addition, in the embodiment described above, a communication control system compatible with a 5G mobile communication network has been described, but the communication network may be LTE / 4G, 6G, or the like.

[0081] The above describes the embodiments of the communication control device and communication control method of the present invention. However, the present invention is not limited to the described embodiments, and various modifications that a person skilled in the art can make within the scope of the invention described in the claims are possible. [Explanation of symbols]

[0082] 1...communication control device, 2...user terminal, 2a...SIM, 20...group of user terminals, 10...UDR, 11...acquisition unit, 12...learning unit, 13...first memory unit, 14...calculation unit, 15...second memory unit, 16...first judgment unit, 17...second judgment unit, 18...communication control unit, 101...bus, 102...processor, 103...main memory unit, 104...communication interface, 105...auxiliary memory unit, 106...input / output I / O, 107...display unit, NW...network.

Claims

1. an acquisition unit configured to acquire past location information of each of a plurality of user terminals based on location information of each user terminal associated with a location registration request signal transmitted from each of the plurality of user terminals; a calculation unit configured to provide the past location information of each of the plurality of user terminals as an unknown input, perform a calculation of a trained recurrent neural network, and output future location information of each of the plurality of user terminals; a first determination unit configured to determine, based on the future location information of each of the plurality of user terminals output by the calculation unit, that a group of user terminals having the same future location information among the plurality of user terminals are a group of user terminals moving along the same route; a communication control unit that issues to a core network a single instruction for setting the same data transmission path for the group of user terminals; Equipped with The location information of each user terminal associated with the location registration request signal is associated with information of a base station in a communication area that covers the location indicated by the location information, Further, a second storage unit is configured to store route information indicating a route along which the group of user terminals moves, the route information including information on communication areas of a series of base stations; The communication control unit, based on the route information, before each user terminal of the user terminal group crosses the communication area of ​​the destination base station, issues the one instruction to the core network to update the setting of the data transmission path associated with the destination base station for each user terminal of the user terminal group. Communications control device.

2. 2. The communication control device according to claim 1, Further, a learning unit configured to learn a recurrent neural network that outputs future location information of the user terminal when past location information of the user terminal is given as input, using a history of location information of the user terminal as teacher data; a first storage unit configured to store the trained recurrent neural network constructed by the training unit; Equipped with The calculation unit reads out the trained recurrent neural network stored in the first storage unit and performs calculations. A communication control device comprising:

3. 2. The communication control device according to claim 1, Further, a second determination unit configured to determine whether or not each user terminal of the user terminal group has crossed a communication area of ​​the destination base station from location information of each user terminal associated with a location registration request signal transmitted from each user terminal of the user terminal group based on the route information, When the second determination unit determines that each user terminal of the user terminal group has crossed the communication area of ​​the destination base station, the communication control unit instructs the core network to perform data communication with each user terminal of the user terminal group via the updated data transmission path. A communication control device comprising:

4. an acquisition step of acquiring past location information of each of the plurality of user terminals based on location information of each user terminal associated with a location registration request signal transmitted from each of the plurality of user terminals; a calculation step of providing the past location information of each of the plurality of user terminals as an unknown input, performing calculations on a trained recurrent neural network, and outputting future location information of each of the plurality of user terminals; a first determination step of determining, based on the future location information of each of the plurality of user terminals output in the calculation step, that a group of user terminals having the same future location information among the plurality of user terminals are a group of user terminals moving along the same route; a communication control step of issuing a single instruction to a core network for setting the same data transmission path for the group of user terminals; Equipped with The location information of each user terminal associated with the location registration request signal is associated with information of a base station in a communication area that covers the location indicated by the location information, Further, a second storage step of storing route information indicating a route along which the group of user terminals moves, the route information including information on the communication areas of a series of base stations, in a second storage unit, The communication control step includes, based on the route information, issuing to the core network the one instruction for updating each user terminal of the user terminal group to a setting of a data transmission path associated with the destination base station before each user terminal of the user terminal group crosses a communication area of ​​the destination base station. Communications control method.

5. 5. The communication control method according to claim 4, Further, a learning step of learning a recurrent neural network that outputs future location information of the user terminal when past location information of the user terminal is given as input, using a history of location information of the user terminal as teacher data; a first storage step of storing the trained recurrent neural network constructed in the learning step in a first storage unit; Equipped with The calculation step reads out the trained recurrent neural network stored in the first storage unit and performs a calculation. A communication control method comprising:

6. 5. The communication control method according to claim 4, Further, a second determination step of determining whether or not each user terminal of the user terminal group has crossed a communication area of ​​the destination base station from location information of each user terminal associated with a location registration request signal transmitted from each user terminal of the user terminal group based on the route information, When the second determination step determines that each user terminal of the user terminal group has crossed the communication area of ​​the destination base station, the communication control step instructs the core network to perform data communication via the updated data transmission path for each user terminal of the user terminal group. A communication control method comprising:

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