Information processing method, information processing system, and program

Abstract

To enable suitable use of renewable energy for communication of terminals.SOLUTION: In an information processing method, a first device constituting part of a cellular network acquires information indicating the utilization status of renewable energy in the operation of the cellular network, and a second device constituting part of the cellular network changes a policy regarding communication of a terminal connected to the cellular network according to the information indicating the utilization status of renewable energy.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to an information processing method, an information processing system, and a program. [Background technology]

[0002] Conventionally, there is a technology for dynamically allocating data processing in accordance with the power generated from renewable energy in a plurality of data centers (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-189845 [Non-patent literature]

[0004] [Non-Patent Document 1] Green energy driven cellular networks with JT CoMP technique, AbuJahida, Abdullah BinShams, Md. Farhad Hossain, Physical Communication Volume 28, June 2018,Pages 58-68 [Non-patent document 2] Sustainable communication and networking in two-tier greencellular networks, Zhongming Zheng; Xiaoxia Zhang; Lin X. Cai; Ran Zhang; Xuemin Shen; IEEE Wireless Communications (Volume: 21, Issue: 4, August 2014) Summary of the Invention [Problem to be solved by the invention]

[0005] The present disclosure aims to provide an information processing method, an information processing system, and a program that enable suitable use of renewable energy for terminal communications. [Means for solving the problem]

[0006] One aspect of the present disclosure is an information processing method in which a first device constituting a cellular network acquires information indicating the usage status of renewable energy in the operation of the cellular network, and a second device constituting the cellular network changes a policy regarding communication of a terminal connected to the cellular network in accordance with the information indicating the usage status of renewable energy.

[0007] Furthermore, one aspect of the present disclosure is an information processing system including: a first device constituting a cellular network, the first device acquiring information indicating the utilization status of renewable energy in the operation of the cellular network; and a second device constituting the cellular network, the second device changing a policy regarding communication of a terminal connected to the cellular network in accordance with the information indicating the utilization status of renewable energy.

[0008] The aspects of the present disclosure may include at least one of a program that causes an information processing device to operate as the first and second devices, and a recording medium on which the program is recorded. [Effects of the Invention]

[0009] According to the present disclosure, renewable energy can be suitably utilized for terminal communications. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are explanatory diagrams of a fifth-generation mobile communication system network (5G network). [Figure 2] FIG. 2 is an explanatory diagram of the information processing system. [Figure 3]FIG. 3A is a diagram showing an example of the configuration of an information processing device, and FIG. 3B is a diagram showing an example of the configuration of a terminal. [Figure 4] FIG. 4 is a sequence diagram showing a communication traffic control method. [Figure 5] FIG. 5 is a flowchart illustrating an example of processing by an information processing device operating as an NWDAF. [Figure 6] FIG. 6 is a flowchart showing an example of processing by an information processing device or a terminal operating as an external server or a UE. [Figure 7] FIG. 7 is a sequence diagram showing a process of changing the PCC rule depending on the usage status of renewable energy. [Figure 8] FIG. 8 is a flowchart illustrating an example of a process performed by the NWDAF in relation to a change in the PCC rule. [Figure 9] FIG. 9 is a flowchart showing an example of processing by the PCF related to a change in the PCC rule. [Figure 10] FIG. 10 is a flowchart showing an example of processing by the PCF related to determining the URSP rule. DETAILED DESCRIPTION OF THE INVENTION

[0011] The information processing method according to the embodiment includes the following. (1) A first device constituting a cellular network acquires information indicating the utilization status of renewable energy in the operation of the cellular network. (2) A second device constituting the cellular network changes a policy regarding communication of terminals connected to the cellular network in accordance with information indicating the usage status of renewable energy.

[0012] According to the information processing method, by changing the policy, it is possible to proactively enable the use of renewable energy for terminal communications or to restrict the use of non-renewable energy, thereby enabling the use of renewable energy in a manner suitable for terminal communications.

[0013] Renewable energy includes natural energy such as sunlight, solar heat, wind power, tidal power, and geothermal heat, biomass energy, and recycled energy such as waste-to-energy generation.

[0014] The cellular network is, for example, a 5G network, but may be other than a 5G network. Below, the 5G network will be described as an example of a cellular network. The information indicating the renewable energy usage status is, for example, information indicating the amount of renewable energy available for operating the 5G network. Alternatively, the information indicating the renewable energy usage status is the renewable energy usage rate in the 5G network (the proportion of energy consumed for operation that is covered by renewable energy (the proportion of renewable energy in consumed energy)). However, the information indicating the renewable energy usage status may be other than these.

[0015] The information processing method may have the following configuration: the first device notifies the second device when a value indicating the renewable energy usage status exceeds or falls below a threshold, and in response to the notification, the second device changes at least one of communication parameters included in the policy to a value corresponding to the value indicating the renewable energy usage status.

[0016] The communication parameters may include at least one of the bit rate, priority, whether or not monitoring of the terminal communication is required, delay time, packet loss rate, and reporting frequency, but may be other than the above examples.

[0017] The second device routes communication between the terminals in accordance with the information indicating the utilization status of renewable energy. For example, when it is determined that the available amount or utilization rate of renewable energy, which is information indicating the utilization status of renewable energy, exceeds a threshold, the second device determines a policy for a route in which terminal communication is offloaded to a non-5G network. Alternatively, when it is determined that the available amount or utilization rate of renewable energy, which is information indicating the utilization status of renewable energy, exceeds a threshold, the second device determines a policy for a route in which terminal communication is offloaded to a non-5G network.

[0018] The first device may be a device that operates as an NWDAF that constitutes a 5G network, and the second device may be a device that operates as a PCF that constitutes a 5G network.

[0019] Hereinafter, an information processing apparatus according to an embodiment will be described with reference to the drawings. The configuration of the embodiment is an example, and the present invention is not limited to the configuration of the embodiment.

[0020] <Configuration of information processing system> FIG. 1A shows components that make up a fifth-generation mobile communication system network (5G network). In FIG. 1, UE (User Equipment) 2 is a terminal of a user (subscriber). RAN (Radio Access Network) 3 is an access network to a 5G core network (5GC). RAN 3 is composed of a base station (gNB) 3A. The 5G network consists of a 5G core network (5GC) and an access network ((R)AN), and UE 2, DN 5, and AL 12 are connected to the 5G network. Each of NFs 11a to 11k is a function realized by one or more computers (information processing devices) executing a program.

[0021] 5GC is composed of a set of components with specific functions called NFs (Network Functions). Figure 1 shows the following NFs 11 that make up 5GC. In Figure 1A, they are shown as bold rectangles. UPF((User Plane Function)11a AMF (Access and Mobility Management Function)11b SMF (Session Management Function)11c PCF(Policy Control Function)11d NEF(Network Exposure Function)11e NRF(Network Repository Function)11g NSSF(Network Slice Selection Function)11h AUSF(Authentication Server Function)11i UDM(Unified Data Management)11j NWDAF(Network Data Analytics Function)11k

[0022] The UPF 11a performs routing and forwarding of user packets (user plane packets sent and received by the UE 2), packet inspection, and QoS processing. The AMF 11b is a device that accommodates the UE in the 5GC1 (Figure 2). The AMF 11b accommodates the RAN 3 and performs subscriber authentication control and UE 2 location (mobility) management. The UDM 12 provides subscriber information, and acquires, registers, deletes, and changes the UE status.

[0023] The SMF 11c manages PDU (Protocol Data Unit) sessions and controls the UPF 11a to implement QoS (Quality of Service) control and policy control. The PDU session is a virtual communication path for exchanging data between the UE 2 and a DN (Data Network) 5. The DN 5 is a data network (such as the Internet) external to the 5GC.

[0024] PCF11d performs QoS control, policy control, charging control, etc. under the control of SMF11c. QoS control controls the quality of communication, such as packet priority transfer. Policy control controls communication, such as QoS based on network or subscriber information, packet transfer availability, and billing. NEF11e is a function that controls the quality of communication, such as AF (Application Function)12. It acts as an intermediary for communication between external nodes and nodes within the control plane. AF12 is an application server (external server) outside of 5GC.

[0025] The NRF 11g stores and manages information about NFs (e.g., AMF, SMF, UPF, etc.) within the 5GC1 (Figure 2). In response to an inquiry about an NF that the NRF 11g wishes to use, the NRF 11g can return multiple NF candidates to the inquiry source.

[0026] The NSSF11h has the function of selecting the network slice to be used by the subscriber from among the network slices generated by network slicing. A network slice is a virtual network with specifications according to the application.

[0027] The AUSF 11i is a subscriber authentication server that performs subscriber authentication under the control of the AMF 11b. The UDM 11j holds subscriber-related information. The NWDAF 11k has the function of collecting and analyzing data from each NF 11, the OAM (Operations, Administration, and Maintenance) terminal 8 (Figure 2), the external server 12a (Figure 2), etc. It is an NF that provides network analysis information.

[0028] Each NF forming 5GC is composed of one or more information processing devices (such as servers and network devices). The information processing devices are installed in a special building called a data center. A data center is also called a station building. As shown in Figure 1B, one or more data centers 6 are placed within the communication area of ​​5GC (Figure 1B shows an example of 3), and the data centers 6 are connected by communication lines 7. Each data center 6 is provided with an OAM terminal 8. The OAM terminal 8 has the function of operating, managing, and maintaining the network (5GC).

[0029] In 5GC, multiple NFs of the same type may be prepared. For example, an NF 11 may be prepared for each data center 6. Also, one NF 11 may be shared between data centers 6. Also, multiple NFs 11 of the same type may be configured in one data center 6. The number of data centers 6, the number of NFs 11, and the correspondence between the NFs 11 and the data centers 6 may be set as appropriate.

[0030] FIG. 2 is an explanatory diagram of an information processing system according to an embodiment. 5GC1 shown in FIG. 2 has NF11 (11a to 11k) shown in FIG. 1A. UE2 is wirelessly connected to base station 3A constituting RAN3, and can exchange data with a communication partner (DN5) through 5GC1. In the example shown in FIG. 2, UE2 is mounted on vehicle 9, but UE2 does not have to be an in-vehicle terminal. Vehicle 9 may be a vehicle driven by a person or an autonomous vehicle.

[0031] In an embodiment, part of the power required to operate the 5G network (5GC1 and RAN3), i.e., to operate the information processing devices that make up the 5G network, can be supplied using renewable energy.

[0032] The NWDAF (data analysis unit) 11k collects and analyzes information (usage status information, an example of first information) indicating the usage status of renewable energy in the entire 5G network or a part of it. The renewable energy usage status information is at least one of the amount of available renewable energy and the renewable energy usage rate (the proportion of electricity used that is generated by renewable energy). The NWDAF 11k transmits the information obtained by the analysis (an example of second information) to a device (an example of a second device) that performs processing related to communication via the 5G network. do.

[0033] The NWDAF 11k can acquire usage status information from at least one (corresponding to a first device) of the NF 11 (for example, the UPF 11a, the SMF 11c, the AMF 11b, the PCF 11d, the UDM 11j, etc.), the base station 3A, and the external server 2 (see FIG. 3). <1> The type of NF11 is not limited to the above examples, and may be a novel NF.

[0034] The usage status information is acquired, for example, by receiving usage status information periodically transmitted from the providing device. Alternatively, the NWDAF 11k may transmit a request for provision and acquire usage status information transmitted from the providing device in response to the request. The number of providing device and the range (unit) of usage status information held by the providing device can be set as appropriate.

[0035] The scope of the usage status information is the entire 5G network or a part of the 5G network (for example, in units of NF). The source of the usage status information may be the OAM terminal 8. From the OAM terminal 8, it is possible to acquire information indicating the usage status of renewable energy in units of data center (station) 6 and the information processing devices (NFs 11 corresponding to the information processing devices) installed (accommodated) in the data center 6. In this way, the scope (area) of the usage status and communication control can be set as appropriate.

[0036] The usage status information may be information indicating the usage status of the entire 5G network, or information indicating the usage status of a portion of the network. The number of source devices may be one or two or more. The NFDAF 11k may obtain information indicating the usage status of the entire 5G network by aggregating the usage status information (indicating the partial usage status of the 5G network) collected from multiple source devices.

[0037] The NWDAF 11k can collect weather forecast information (forecasts of solar radiation, wind speed, etc.) from an external server 12a connected to the 5GC via the NEF 11e. The external server 12a is an example of a first device, and the weather forecast information is an example of first information.

[0038] The NWDAF 11k uses (analyzes) the collected information (first information) to generate at least one of information indicating the current usage status (available amount and usage rate of renewable energy) and information indicating a prediction of the usage status at a future time (FIG. 3 <2> ) The number of future points in time (prediction points in time) and the length of time between prediction points in time (time elapsed from the present time) can be set as appropriate. However, if at least one of the available amount and utilization rate of renewable energy in the current usage situation is calculated and no prediction is made, obtaining weather forecast information can be omitted.

[0039] The NWDAF 11k transmits information indicating at least one of the current usage status and the future usage status (an example of second information) to a predetermined destination (see FIG. 3). <3> The predetermined destination is, for example, at least one of the external server 12b, the UE2, and the predetermined NF 11 connected via the NADAF 11k and the NEF 11e. Each of the external server 12b, the UE2, and the predetermined NF 11 is an example of a "device that performs processing related to communication." The NF 11 is, for example, the UPF 11b, the SMF 11c, the AMF 11b, the PCF 11d, the UDM 11j, etc., but is not limited to these.

[0040] The NWDAF11k may transmit information to a predetermined destination that encourages an increase or decrease in communication volume via the 5G network based on information indicating the current or future usage status. At this time, information specifying a time period for increasing or decreasing communication volume may be included.

[0041] The second information can be transmitted by either the Subscribe / Notify method or the Request / Response method (similar to the provisions of TS23.288 Chapter 6.1). When the Subscribe / Notify method is applied, information (an example of the second information) that encourages an increase in communication volume is transmitted when, for example, the available amount or utilization rate of renewable energy exceeds the first threshold. In addition, when the communication volume decreases, The transmission of information (an example of second information) encouraging reduction is performed, for example, when the available amount or utilization rate of renewable energy falls below a second threshold. The first threshold and the second threshold may be the same value or different values. Also, different values ​​are prepared for the first and second utilization rates, depending on the available amount and utilization rate. Also, when the Request / Response method is applied, the NWDAF11k transmits the second information to the provider in response to a request from the provider of the second information.

[0042] The external server 12b and the UE 2 can control the communication based on the second information (see FIG. 3). <4> For example, when the external server 12b receives the second information and receives information encouraging an increase in communication volume, the external server 12b increases the transmission rate of packets transmitted on the downlink during a designated time period. Alternatively, the UE 2 that receives the second information increases the transmission rate of packets transmitted on the uplink during a designated time period.

[0043] An increase in the transmission rate increases the amount of packets transmitted per unit time. This increases the load of packet forwarding processing on the packet forwarding path of the 5G network (for example, the base station 3A, the UPF 11a, and the NEF 11e), resulting in increased power consumption. This allows renewable energy to be consumed appropriately for packet forwarding. Conversely, the transmission of the second information reduces the packet transmission rate of the external server 12b and the UE 2. Packet transmission may be stopped. This reduces the load of forwarding processing in the 5G network and reduces power consumption using sources other than renewable energy. By increasing or decreasing the transmission rate (stopping or resuming communication) in this way, renewable energy can be consumed efficiently. Furthermore, information prompting an increase or decrease in communication volume may be transmitted to the NF 11 (for example, the PCF 11d, the SMF 11c, the UPF 11a, etc.).

[0044] <Configuration of information processing device and terminal> 3A is a diagram showing an example of the configuration of an information processing device that can operate as each of NFs 11a to 11k, OAM terminal 8, and external servers 12a and 12b. In FIG. 3A, information processing device 20 can be configured using a dedicated or general-purpose information processing device (computer) such as a personal computer (PC), a workstation (WS), or a server machine. However, information processing device 20 may also be a collection (cloud) of one or more computers.

[0045] The information processing device 20 includes a processor 21 as a processing unit or control unit (controller), a storage device 22, a communication interface 23 (communication IF23), an input device 24, and a display 25, which are interconnected via a bus 26.

[0046] The storage device 22 includes a main storage device and an auxiliary storage device. The main storage device is used as at least one of a storage area for programs and data, a program development area, a program work area, and a buffer area for communication data. The main storage device is configured with RAM (Random Access Memory) or a combination of RAM and ROM (Read Only Memory). The auxiliary storage device is used as a storage area for data and programs. A non-volatile storage medium is used as the auxiliary storage device. Examples of non-volatile storage media include a hard disk, a solid state drive (SSD), a flash memory, and an EEPROM (Electrically Erasable Programmable Read-Only Memory). The storage device 22 may also include a drive device for a disk recording medium.

[0047] The communication IF 23 is a circuit that performs communication processing. For example, the communication IF 23 is a network interface card (NIC). The communication IF 23 may also be a wireless communication circuit that performs wireless communication (5G, wireless LAN (Wi-Fi), BLE, etc.). F23 may be a combination of a circuit that performs wired communication processing and a wireless communication circuit.

[0048] The input device 24 includes keys, buttons, a pointing device, a touch panel, etc., and is used to input information. The display 25 is, for example, a liquid crystal display, etc., and displays information and data.

[0049] The processor 21 performs various processes by executing various programs stored in the storage device 22. When the processor 21 executes the programs stored in the storage device 22, the information processing device 20 can operate as each of the NFs 11a to 11k, the OAM terminal 8, and the external servers 12a and 12b.

[0050] 3B is a diagram showing an example configuration of a terminal 40 operable as a UE 2. The terminal 40 includes a processor 41, a storage device 42, a communication interface 43 (communication IF 43), an input device 44, and a display 45, which are interconnected via a bus 46. The processor 41, the storage device 42, the communication IF 43, the input device 44, and the display 45 can be similar to the processor 21, the storage device 22, the communication IF 23, the input device 24, and the display 25. Therefore, a description thereof will be omitted.

[0051] The processors 21 and 41 are, for example, Central Processing Units (CPUs). The U is also called a Microprocessor Unit (MPU). The processors 21 and 41 are a single processor. The processors 21 and 41 may have a single processor configuration or a multiprocessor configuration. Also, a single physical CPU connected via a single socket may have a multi-core configuration. The processors 21 and 41 may include arithmetic units of various circuit configurations, such as a digital signal processor (DSP) or a graphics processing unit (GPU). The processors 21 and 41 may also have a configuration in which they cooperate with at least one of an integrated circuit (IC), other digital circuit, and analog circuit. Integrated circuits include LSI, application specific integrated circuit (ASIC), programmable logic device (PLD), etc. PLD The processors 21 and 4 include, for example, a Field-Programmable Gate Array (FPGA). 1 also includes, for example, what is called a microcontroller (MCU), SoC (System-on-a-chip), system LSI, or chipset.

[0052] <Processing example> 4 is a sequence diagram showing an example of processing in the information communication system. A predetermined NF 11 and a base station 3A in the 5GC1 periodically transmit information (usage status information) indicating the usage status of renewable energy that they hold (store) to the NWDAF 11k (FIG. 4 <1> The transmission of usage information may be made at the request of the NWDAF 11k.

[0053] The external server 12a periodically transmits the weather forecast information that it holds (stores) to the NWDAF 11k (see FIG. 4). <2> The weather forecast information may be transmitted in response to a request from the NWDAF 11k. If no forecast is to be made based on the weather forecast information, reception of the weather forecast information may be omitted.

[0054] The NWDAF 11k analyzes the usage status information and the weather forecast information to generate second information (see FIG. 4 <3> For example, the NWDAF 11k generates communication control information (for example, information that encourages an increase in communication volume during a predetermined time period) from the usage status information and weather forecast information.

[0055] The NWDAF 11k transmits communication control information to the external server 12b and the UE 2 (see FIG. 4). <4> The external server 12b and the UE2 each perform communication control based on the communication control information (see FIG. 4). <5> For example, the communication control information may include information indicating that restrictions on the type of data are lifted (promoting an increase in communication volume) in areas and time periods where renewable energy is available in sufficient quantities. In this case, the external server 12b and the UE 2 transmit all types of data. On the other hand, in areas and time periods where renewable energy is insufficient, During the interval, the communication control information may include information indicating that low-latency data is to be transmitted and that transmission of data other than low-latency data is to be stopped (to encourage a reduction in communication volume). The external server 12b and the UE 2 transmit only low-latency data.

[0056] As an example of communication control, a configuration can be adopted in which a threshold for the available amount of renewable energy is set in advance, and when the available amount exceeds the threshold, communication control information is transmitted so that each of the external server 12b and the UE 2 transmits packets without any restrictions. When the available amount is below the threshold, restrictions are imposed on packet transmission. Also, a configuration can be adopted in which the utilization rate of renewable energy is divided into several stages, the type of data that can be transmitted for each stage is defined, and the type of data transmitted corresponds to the utilization rate.

[0057] Furthermore, a configuration may be adopted in which the NWDAF 11k transmits communication control information when the base station 3A, the UPF 11a, etc. are changed (the communication path is changed) due to handover of the UE 2 or the like.

[0058] Furthermore, the NWDAF 11k may use a location information prediction function to determine the base station 3A and UPF 11a that the UE 2 will use in the future, and use the determined base station and UPF 11a for future communication control.

[0059] 5 is a flowchart showing an example of processing by the information processing device 20 operating as the NWDAF 11k. <3> 5 is executed by the processor 21 of the information processing device 20.

[0060] In step S01, the processor 21 calculates information indicating the available amount or utilization rate (utilization status) of renewable energy at a certain time. A certain time refers to the present time and one or more future time points, and the number of future time points is set in advance. In this embodiment, it is set to predict 30 minutes and 1 hour from the present time. In the first step S01, information indicating the utilization status at the present time is calculated.

[0061] In step S02, processor 21 determines whether the value indicating the renewable energy available amount or utilization rate is greater than a first threshold (greater than or equal to the first threshold). If it is determined that the value indicating the renewable energy available amount or utilization rate is greater than the first threshold, the process proceeds to step S07; otherwise, the process proceeds to step S03.

[0062] In step S03, processor 21 determines whether the value indicating the renewable energy available amount or utilization rate is below the second threshold (less than the second threshold). If it is determined that the value indicating the renewable energy available amount or utilization rate is below the second threshold, the process proceeds to step S04; otherwise, the process proceeds to step S07.

[0063] In step S04, processor 21 generates communication control information that encourages an increase in communication volume during a time period that includes a certain point in time, and proceeds to step S07. The communication control information may include, for example, information indicating an increase or maintenance of the transmission rate during the time period, or information indicating the resumption of communication.

[0064] In step S05, processor 21 generates communication control information that prompts a reduction in the amount of communication during a time period that includes a certain point in time, and proceeds to step S07. The communication control information is, for example, information that indicates a reduction in the transmission rate or a temporary suspension of communication during the time period.

[0065] In step S06, processor 21 determines whether there is a next time point (in this embodiment, 30 minutes and 1 hour from now) at which the processes of steps S01 to S05 should be performed. If it is determined that there is a next time point, the process returns to step S01; otherwise, the process proceeds to step S07. If the process returns to step S01, a predicted value of the available amount or utilization rate of renewable energy for the next time point (for example, 30 minutes from now) is calculated based on weather forecast information.

[0066] In step S07, the processor 21 transmits the communication control information corresponding to each time point to a predetermined destination (for example, at least one of the external server 12b and the UE 2). After that, the process shown in FIG.

[0067] 6 is a flowchart showing an example of processing by the information processing device 20 operating as the external server 12b and the terminal 40 operating as the UE 2. In FIG. 6, communication control in the external server 12b or the UE 2 (see FIG. 4) is performed. <5> 6 is executed by the processor 21 of the information processing device 20 (external server 12b) or the processor 41 of the terminal 40 (UE2). The following description will exemplify the processing in the processor 21 of the information processing device 20. The processing by the processor 41 is also similar.

[0068] In step S101, processor 21 receives communication control information. In step S102, a certain point in time included in the communication control information is identified. In this embodiment, processor 21 identifies the current point in time, a point in time 30 minutes from now, and a point in time 1 hour from now. In the first processing of S101, the current point in time is identified.

[0069] In step S103, it is determined whether the communication control at the time point identified in step S102 is an increase in communication volume. If it is determined that the communication volume is an increase, the process proceeds to step S104, and if not (a decrease in communication volume), the process proceeds to step S107.

[0070] In step S104, the processor 21 waits for the current time to reach the start time of the time slot corresponding to the point in time identified in step S102, as the timing for the change.

[0071] In step S105, the processor 21 performs processing to increase communication traffic, such as increasing the packet transmission rate or lifting restrictions on the types of packets that can be transmitted. At this time, if the transmission rate has reached its upper limit or if the restrictions have already been lifted, the transmission rate or the lifted state is maintained. Then, the processing proceeds to step S106.

[0072] In step S104, processor 21 determines whether there is a next time point at which the processing of steps S102 to S108 should be performed (in this embodiment, the time points are 30 minutes and 1 hour later). If it is determined that there is a next time point, the processing returns to step S102; if not, the processing of Fig. 6 ends. If the processing returns to step S01, the next time point (for example, 30 minutes from the current time point) is identified, and the processing of step S103 and subsequent steps is performed.

[0073] In step S107, the processor 21 waits for the current time to reach the start time of the time slot corresponding to the point in time identified in step S102, as the timing for the change.

[0074] In step S108, the processor 21 performs a communication traffic reduction process by lowering the packet transmission rate, restricting the types of packets that can be transmitted (strengthening the restriction), temporarily suspending packet transmission, etc. At this time, if the transmission rate has reached the lower limit, If the transmission rate is in the limited or paused state, the transmission rate is maintained in the limited or paused state, and the process then proceeds to step S106.

[0075] <Policy control according to renewable energy usage> In the 5G network shown in Figure 1A, the AMF 11b provides authentication, authorization, mobility management, etc. for the UE 2. The AMF 11b also controls the SMF 11c, which manages the PDU session (hereinafter referred to as the session) of the UE 2, assigns an IP address, and selects and controls the UPF 11a for data (user packet) forwarding.

[0076] A session is established between UE2 and DN5 via UPF 11a, and one or more service data flows (SDFs) are set within the session. When UE2 establishes multiple sessions, each session is managed independently, and a different SMF 11c can be assigned to each session so that a different NF 11 is used for each session. In 5GC1, management related to UE2 is performed by one AMF 11b, and traffic is handled by an SMF 11c for each individual network slice.

[0077] The PCF 11d can set policy and charging control (PCC) rules that allow the AMF 11b and SMF 11c to operate appropriately and define the processing to be applied to packets associated with a specific SDF. The PCC rules are provided to the SMF 11b that manages the session, and the SMF 11b performs policy and charging control according to the PCC rules and controls the operation of the UPF 11a so that the QoS set for the session is satisfied.

[0078] The PCC rule is set by setting parameters specified in, for example, TS23.503 Table 6.3.1. FIG. 7 is a sequence diagram showing the process of changing the PCC rule. In the example shown in FIG. 7, a predetermined source (for example, an NF 11 such as an SMF 11c or a UPF 11a) periodically (or irregularly (when an event occurs)) transmits renewable energy usage status information to an NWDAF 11k (FIG. 7 <1> ) The external server 12a also transmits weather forecast information to the NWDAF 11k (see FIG. 7). <2> ).

[0079] The NWDAF11k analyzes the usage status information and weather forecast information (first information) and calculates the available amount or utilization rate of renewable energy (see FIG. 7 <3> ).

[0080] The NWDAF 11k has (stores) one or more thresholds related to the available amount or utilization rate of renewable energy. When the available amount or utilization rate exceeds or falls below the threshold, the NWDAF 11k transmits information indicating the available amount or utilization rate (information indicating the analysis result, corresponding to the second information) to the PCF 11d (FIG. 7 <4> 7, the PCF 11d can request the NWDAF 11k to provide information and receive information indicating the available capacity or utilization rate.

[0081] The PCF 11d receives information from the NWDAF 11k and sets a new PCC rule or modifies its own PCC rule (the PCC rule currently being set). Of the multiple parameters that make up the PCC rule, the following parameters are set or modified (updated) based on the results of a comparison (analysis) of the available amount or utilization rate of renewable energy with a threshold. However, the following parameters are examples, and other parameters may also be updated. UL Max Bitrate: Maximum uplink bitrate allowed in SDF DL Max Bitrate: The maximum downlink bitrate allowed by the SDF. UL Guaranteed Bit Rate: Uplink guaranteed bit rate allowed by SDF DL Guaranteed Bitrate: Downlink guaranteed bitrate allowed by SDF Priority level: Indicates the priority in scheduling resources within a QoS flow. · Indication of exclusion from session level monitoring: Indicates that the SDF should be excluded from monitoring of PDU session usage. ·UL Max Packet Loss Rate: The maximum packet loss rate that can be tolerated on the SDF uplink. DL Max Packet Loss Rate: The maximum packet loss rate that can be tolerated in the SDF downlink Reporting frequency: Define the reporting frequency for event triggers, etc. To do. User Plane Latency: The time it takes for a user packet to travel from source to destination.

[0082] For example, if the value indicating the usage status exceeds the threshold (when there is sufficient renewable energy), the bit rate is increased to increase the number of packets per hour and increase the utilization rate of renewable energy. On the other hand, if the value indicating the usage status falls below the threshold (when there is insufficient renewable energy), the bit rate, priority, reporting frequency, delay time, packet loss rate, or throughput is reduced (mitigated). Alternatively, monitoring is stopped. These measures aim to reduce the power consumption required to process packets.

[0083] The PCF 11d notifies the SMF 11c of the set or updated PCC rule information (Figure 7 <6> and <7> )). The SMF 11 performs policy and billing control based on the set or updated PCC rules. This allows for processing to promote the consumption of renewable energy when there is sufficient renewable energy. On the other hand, when there is a shortage of renewable energy, the processing load is reduced and the use of non-renewable energy is suppressed. This allows for optimal use of renewable energy.

[0084] 8 is a flowchart showing an example of processing by the information processing device 20 operating as the NWDAF 11k. <3> 8 shows an example of the process. The process shown in FIG. 8 is executed by the processor 21 of the information processing device 20 (NWDAF11k).

[0085] In step S201, the processor 21 determines whether or not an information provision request has been made from the PCF 11d. If it is determined that an information provision request has been made, the process proceeds to step S203, and if not, the process proceeds to step S202.

[0086] In step S202, processor 21 determines whether it is time to calculate the usage status. If it is determined that it is time to calculate the usage status, the process proceeds to step S203; if not, the process returns to step S201.

[0087] In step S203, the processor 21 calculates the available amount or utilization rate of renewable energy at a certain point in time using information received from the SMF 11c, etc. In step S204, the processor 21 compares the available amount or utilization rate calculated in step S203 with a threshold value that is held (stored) in advance.

[0088] In step S205, it is determined whether the available capacity or utilization rate exceeds or falls below a threshold. If it is determined that the available capacity or utilization rate exceeds or falls below the threshold, the process proceeds to step S206; if not, the process in FIG. 8 ends.

[0089] In step S206, the processor 21 transmits information indicating the analysis result (information indicating that the available amount or the utilization rate is above or below the threshold) to the PCF 11d.

[0090] 9 is a flowchart showing an example of processing by the processor 21 of the information processing device 20 operating as the PCF 11d. In step S221, the processor 21 determines whether or not there has been a notification of the analysis result from the NAWDAF 11k. If it is determined that there has been a notification of the analysis result, the process proceeds to step S225; otherwise, the process proceeds to step S22.

[0091] In step S222, the processor 21 waits for the timing to send a request to send information, and when the request timing arrives, the processor 21 sends the request to send information (step S223).

[0092] In step S224, the processor 21 waits for reception of information indicating the analysis result. If it is determined that information indicating the analysis result has been received, the process proceeds to step S225.

[0093] In step S225, processor 21 detects (identifies) the parameters of the PCC rule corresponding to the analysis result. Here, setting values ​​of the parameters of the PCC rule corresponding to each of the available amounts or utilization rates (multiple stages (classes)) as the analysis result are stored in advance in storage device 22. In step S226, processor 21 reads out the corresponding setting values ​​and updates the PCC rule with the read out values.

[0094] In step S227, the processor 21 transmits the updated PCC rule to the SMF 11c, which then performs policy control and QoS control using the transmitted PCC rule.

[0095] In addition, the PCF 11d can change the policy settings related to the communication route of the UE2 depending on the usage status of renewable energy. In order to operate applications on the network slice more efficiently, the PCF 11d supports URSP (User equipment Route Selection Policies) based on the 3GPP standard specifications, and can also select applications with specific requirements. It supports the ability to direct services to a specific slice.

[0096] For example, as a policy (URSP rule) for the traffic route of UE2, there is a policy to select a route via the 5G network and a policy to select a route via a non-5G network (for example, wireless LAN such as Wi-Fi). A policy for selecting a route to offload to a non-5G network is prepared in advance. The PCF 11d can set such a URSP rule according to the usage status of renewable energy. For example, the PCF 11d sets a URSP rule that selects a route via a non-5G network when the available amount or usage rate of renewable energy falls below a threshold. This allows the packet traffic of UE2 to be offloaded.

[0097] 10 is a flowchart showing an example of processing by the information processing device 20 operating as the PCF 11d. In FIG. 10, the processing of steps S221 to S224 is the same as the processing shown in FIG. 9, and therefore description thereof will be omitted. In step S231, the processor 21 determines a URSP rule for the traffic (PDU session) of UE2 according to the analysis result (that the value indicating the utilization status of renewable energy (available amount or utilization rate) is above or below a threshold). That is, when it is determined that the available amount or utilization rate of renewable energy is above the threshold, the PCF 11d determines a URSP rule for selecting a route for the traffic of UE2 via the 5G network. On the other hand, when it is determined that the available amount or utilization rate of renewable energy is below the threshold, the PCF 11d determines a URSP rule for selecting a route for offloading the traffic of UE2 to a non-5G network.

[0098] In step S232, the determined URSP rule is notified to the AMF. , controls UE2, and the traffic of UE2 is set to a route (slice) according to the URSP rules.

[0099] <Effects of the embodiment> In the information processing system according to the embodiment, an information processing device 20 (first device) operating as an NWDAF 11k constituting a 5G network (cellular network) acquires information indicating the utilization status of renewable energy in the operation of the 5G network. In addition, an information processing device 20 (second device) operating as a PCF 11d constituting the 5G network sets a policy regarding communication of a UE 2 (terminal) connected to the 5G network according to the utilization status of renewable energy.

[0100] The NWDAF 11k notifies the PCF 11d when a value indicating the usage status of renewable energy (available amount or usage rate) exceeds or falls below a threshold. In response to the notification, the PCF 11d can change at least one of the communication parameters included in the policy to a value corresponding to the value indicating the usage status of renewable energy.

[0101] The communication parameters may include at least one of a bit rate, a priority, whether or not monitoring of the terminal communication is required, a delay time, a packet loss rate, and a reporting frequency. By changing the communication parameters, it is possible to perform processing related to the communication of the UE2 that actively utilizes renewable energy or to reduce consumption of energy other than renewable energy.

[0102] Furthermore, in the information processing system according to the embodiment, the PCF 11d can determine a policy (determine a URSP rule) related to the UE traffic route (terminal communication route) according to information indicating the usage status of renewable energy. Therefore, when there is a shortage of renewable energy, a route is set to offload the UE2 traffic to a non-5G network. This reduces consumption of non-renewable energy. On the other hand, when there is sufficient renewable energy, a route is set to pass through the 5G network for the UE2 traffic. This allows for optimal use of renewable energy.

[0103] The above-described embodiment and modifications are merely examples, and the present disclosure may be modified as appropriate within the scope of the present disclosure. Furthermore, the processes and means described in the present disclosure may be freely combined and implemented as long as no technical contradiction occurs.

[0104] Furthermore, a process described as being performed by one device may be shared and executed by multiple devices. Alternatively, a process described as being performed by different devices may be executed by one device. In a computer system, the hardware configuration (server configuration) by which each function is realized can be flexibly changed.

[0105] The present disclosure can also be realized by providing a computer program implementing the functions described in the above embodiments to a computer, and having one or more processors in the computer read and execute the program. Such a computer program may be provided to the computer via a non-transitory computer-readable storage medium connectable to the computer's system bus or via a network. Non-transitory computer-readable storage media include any type of medium suitable for storing electronic instructions, such as any type of disk, including magnetic disks (e.g., floppy disks, hard disk drives (HDDs), etc.), optical disks (e.g., CD-ROMs, DVDs, Blu-ray disks), read-only memory (ROM), random access memory (RAM), EPROM, EEPROM, magnetic cards, flash memory, or optical cards. [Explanation of symbols]

[0106] 1···5GC, 2···UE, 3···RAN, 3A···Base Station, 11a to 11k···NF, 12a, 12b···External Server, 21, 41···Processor, 22, 42···Storage Device

Claims

1. A first device constituting a cellular network acquires information indicating a utilization status of renewable energy in the operation of the cellular network; An information processing method in which a second device constituting the cellular network changes a policy regarding communication of terminals connected to the cellular network in accordance with information indicating the usage status of the renewable energy.

2. The first device notifies the second device when the value indicating the utilization status of the renewable energy exceeds a threshold; The information processing method according to claim 1 , wherein the second device changes at least one of the communication parameters included in the policy to a value corresponding to a value indicating the utilization status of the renewable energy in response to the notification.

3. The first device notifies the second device when the value indicating the utilization status of the renewable energy falls below a threshold; The information processing method according to claim 1 , wherein the second device changes at least one of the communication parameters included in the policy to a value corresponding to a value indicating the utilization status of the renewable energy in response to the notification.

4. The communication parameters include at least one of a bit rate, a priority, whether or not monitoring of the terminal communication is necessary, a delay time, a packet loss rate, and a frequency of reporting, related to the terminal communication.

4. The information processing method according to claim 2 or 3.

5. The second device determines a policy for a communication route of the terminal in accordance with the information indicating the utilization status of the renewable energy. The information processing method according to claim 1 .

6. The second device determines a policy of a route for communication of the terminal via the cellular network when it is determined that an available amount or a utilization rate of the renewable energy, which is information indicating a utilization status of the renewable energy, exceeds a threshold. The information processing method according to claim 5 .

7. The second device determines a policy of a route for offloading communication of the terminal to a non-cellular network when it is determined that the available amount or utilization rate of the renewable energy, which is information indicating the utilization status of the renewable energy, exceeds a threshold. The information processing method according to claim 5 .

8. The first device is a device that operates as an NWDAF that configures the cellular network. The information processing method according to claim 1 .

9. The second device is a device that operates as a PCF that configures the cellular network. The information processing method according to claim 1 .

10. A first device constituting a cellular network, the first device acquiring information indicating a utilization status of renewable energy in the operation of the cellular network; a second device constituting the cellular network, the second device changing a policy regarding communication of a terminal connected to the cellular network in accordance with information indicating a usage status of the renewable energy; An information processing system including:

11. The first device notifies the second device when the value indicating the utilization status of the renewable energy exceeds a threshold; The information processing system according to claim 10 , wherein the second device changes at least one of the communication parameters included in the policy to a value corresponding to a value indicating the utilization status of the renewable energy in response to the notification.

12. The first device notifies the second device when the value indicating the utilization status of the renewable energy falls below a threshold; The information processing system according to claim 10 , wherein the second device changes at least one of the communication parameters included in the policy to a value corresponding to a value indicating the utilization status of the renewable energy in response to the notification.

13. The communication parameters include at least one of a bit rate, a priority, whether or not monitoring of the terminal communication is necessary, a delay time, a packet loss rate, and a frequency of reporting, related to the terminal communication.

13. The information processing system according to claim 11 or 12.

14. The second device determines a policy for a communication route of the terminal in accordance with the information indicating the utilization status of the renewable energy. The information processing system according to claim 10.

15. When it is determined that the available amount or utilization rate of the renewable energy, which is the information indicating the utilization status of the renewable energy, exceeds a threshold, the second device determines a policy of a route for communication of the terminal via the cellular network. The information processing system according to claim 14.

16. When the second device determines that the available amount or utilization rate of the renewable energy, which is the information indicating the utilization status of the renewable energy, is below a threshold, the second device determines a policy of a route for offloading communication of the terminal to a non-cellular network. The information processing system according to claim 14.

17. The first device is a device that operates as an NWDAF that configures the cellular network. The information processing system according to claim 10.

18. The second device is a device that operates as a PCF that configures the cellular network. The information processing system according to claim 10.

19. A program for causing an information processing device to operate as the first device according to claim 10.

20. A program for causing an information processing device to operate as the second device according to claim 10.

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