Information processing device, information processing method and communication device

Abstract

An information processing device includes: an acquisition unit that acquires information about side link communication; and a determination unit that determines whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on the information about the side link communication.

Description

Technical Field

[0001] The present disclosure relates to an information processing device, an information processing method, and a communication device. Background Art

[0002] Conventionally, automatic repeat request (ARQ) is known as a technique for automatically retransmitting data when an error occurs in a communication path. In recent years, in radio communications, hybrid ARQ (HARQ) has come to be used as an advanced version of ARQ in order to efficiently use radio resources.

[0003] Citation List

[0004] Patent Literature

[0005] Patent Document 1: JP 2017-208796 A Summary of the invention

[0006] Technical issues

[0007] However, in radio communication, in addition to the requirement for efficient use of radio resources, there are also requirements for communication performance (e.g., communication reliability and / or delay, etc.). When an automatic retransmission technology such as HARQ is simply used for radio communication, the communication performance may deteriorate depending on communication aspects such as the use case of the radio communication and the communication environment of the radio communication.

[0008] Therefore, the present disclosure provides an information processing device, an information processing method, and a communication device capable of achieving high communication performance.

[0009] Solution to the problem

[0010] In order to solve the above problems, an information processing device according to the present disclosure includes: an acquisition unit that acquires information about sidelink communication; and a determination unit that determines whether to enable feedback related to an automatic retransmission requirement of data in the sidelink communication based on the information about the sidelink communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a diagram for explaining V2X communication.

[0012] Figure 2 is a diagram illustrating an example of an overall image of V2X communication.

[0013] Figure 3 is a diagram illustrating an example of a use case of V2X communication.

[0014] Figure 4 is an example of V2V communication according to scenario 1.

[0015] Figure 5is an example of V2V communication according to scenario 2.

[0016] Figure 6 is an example of V2V communication according to scenario 3.

[0017] Figure 7 is an example of V2V communication according to scenario 4.

[0018] Figure 8 is an example of V2V communication according to scenario 5.

[0019] Fig. 9 is an example of V2V communication according to scenario 6.

[0020] Fig.10 is a diagram illustrating a configuration example of an information processing system 1 according to an embodiment of the present disclosure.

[0021] Fig.11 is a diagram illustrating a specific configuration example of the information processing system.

[0022] Fig.12 is a diagram illustrating a configuration example of a management device according to an embodiment of the present disclosure.

[0023] Fig.13 is a diagram illustrating a configuration example of a base station device according to an embodiment of the present disclosure.

[0024] Fig.14 is a diagram illustrating a configuration example of a base station device according to an embodiment of the present disclosure.

[0025] Fig.15 is a diagram illustrating a configuration example of a terminal device according to an embodiment of the present disclosure.

[0026] Fig.16 is a diagram illustrating a configuration example of a mobile device according to an embodiment of the present disclosure.

[0027] Fig.17 is a flowchart illustrating a discrimination process according to an embodiment of the present disclosure.

[0028] Fig.18 is a diagram illustrating a notification process of a determination result when a transmitting device determines whether to enable / disable HARQ feedback.

[0029] Fig.19 is a diagram illustrating a notification process of a determination result when a receiving device determines whether to enable / disable HARQ feedback.

[0030] Fig. 20 is a diagram illustrating a notification process of a determination result when a base station apparatus determines whether to enable / disable HARQ feedback.

[0031] Fig.21is a diagram illustrating a notification process of a determination result when a base station apparatus determines whether to enable / disable HARQ feedback.

[0032] Fig. 22 is a diagram illustrating a notification process of a determination result when a master communication device determines whether to enable / disable HARQ feedback.

[0033] Fig.23 is a diagram illustrating a notification process of a determination result when a master communication device determines whether to enable / disable HARQ feedback.

[0034] Fig.24 is a diagram illustrating a data retransmission process according to HARQ feedback mode 1.

[0035] Fig.25 is a diagram illustrating a data retransmission process according to HARQ feedback mode 2.

[0036] Fig.26 is a diagram illustrating a data retransmission process according to HARQ feedback mode 3.

[0037] Fig. 27 is a diagram illustrating a data retransmission process according to HARQ feedback mode 4.

[0038] Fig.28 is a diagram illustrating a data retransmission process according to HARQ feedback mode 5.

[0039] Fig.29 is a diagram illustrating a data retransmission process according to HARQ feedback mode 6.

[0040] Fig.30 is a diagram illustrating a data retransmission process according to HARQ feedback mode 7.

[0041] Fig.31 is a diagram illustrating a data retransmission process according to HARQ feedback mode 8.

[0042] Fig.32 is a diagram illustrating a data retransmission process according to HARQ feedback mode 9.

[0043] Fig.33 is a diagram illustrating an example of a combination of side link information and a discriminator. DETAILED DESCRIPTION

[0044] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following embodiments, the same parts are denoted by the same reference numerals, and thus repeated descriptions will be omitted.

[0045] In addition, in this specification and the drawings, multiple components having substantially the same functional configuration may be distinguished by adding different numbers after the same reference numerals. For example, multiple configurations having substantially the same functional configuration are distinguished as base station devices 201 and 202 as required. However, when it is not necessary to distinguish each of the multiple components having substantially the same functional configuration, only the same reference numeral is given. For example, when it is not necessary to distinguish between base station devices 201 and 202, they are simply referred to as base station device 20.

[0046] Additionally, the present disclosure will be described in the following item order.

[0047] 1. Introduction

[0048] 1-1. Overview of V2X Communication

[0049] 1-2. V2X Use Cases

[0050] 1-3. Physical layer enhancement

[0051] 1-4.V2X operation scenarios

[0052] 1-5. Overview of this embodiment

[0053] 2. Information processing system configuration

[0054] 2-1. Overall configuration of the information processing system

[0055] 2-2. Configuration of management equipment

[0056] 2-3. Configuration of base station equipment (network)

[0057] 2-4. Configuration of base station equipment (infrastructure)

[0058] 2-5. Terminal equipment configuration

[0059] 2-6. Configuration of mobile devices

[0060] 3. Operation of information processing systems

[0061] 3-1. Determination process of enabling / disabling HARQ feedback

[0062] 3-2. Execution entity of the judgment process

[0063] 3-3. Information used for identification

[0064] 3-4. Notification of the results of the assessment

[0065] 3-5. Execution of side link communication after determination

[0066] 3-6.HARQ Feedback Mode

[0067] 4. Modifications

[0068] 4-1. Modification of HARQ feedback

[0069] 4-2. Other changes

[0070] 5. Conclusion

[0071] <<1. Introduction>>

[0072] Conventionally, mobile communication systems have provided communication functions for mobile terminals such as mobile phones and smart phones. However, in recent years, it has become important for mobile communication systems to support communications for mobile units of a type other than mobile terminals (e.g., cars, drones, and robots).

[0073] For example, in recent years, mobile communication systems are required to support vehicle-to-everything (V2X) communication as communication for automobiles. Examples of communication for automobiles include road-to-vehicle communication achieved through intelligent transportation systems (ITS) and the like, and vehicle-to-vehicle communication achieved through sidelink communication and the like. This communication technology is likely to become an important technology for realizing autonomous driving in the future.

[0074] Here, V2X communication is the communication between a vehicle and "something". Figure 1 is a diagram for explaining V2X communication. Here, examples of "something" include vehicles, infrastructure, networks, pedestrians, etc. Communication between vehicles is called vehicle-to-vehicle (V2V) communication. Communication between vehicles and infrastructure is called vehicle-to-infrastructure (V2I) communication. Communication between vehicles and networks is called vehicle-to-network (V2N) communication. Communication between vehicles and pedestrians is called vehicle-to-pedestrian (V2P) communication.

[0075] <1-1. Overview of V2X Communication>

[0076] Figure 2 : is a diagram illustrating an example of an overall image of V2X communication. Figure 2 In the example shown, the cloud server has the APP server (application server) function of V2X. The cloud server is connected to the core network via a network such as the Internet. The core network consists of devices with control functions for V2X communication. Multiple base stations are connected to the core network. The base stations have communication with the terminal devices ( Figure 2The base station has a function of supporting direct communication (e.g., side link communication) such as vehicle in the example of V2X (e.g., Uu link connection function using Uu interface). In addition, the base station has a function of supporting direct communication (e.g., side link communication) such as V2V communication and V2P communication. Roadside units (RSU) are deployed on the road as infrastructure. There are two possible types of RSU, base station type RSU and UE type RSU. RSU has an APP providing function and a data relay function such as V2X.

[0077] <1-2. V2X use cases>

[0078] So far, for radio communication for automobiles, the development of dedicated short-range communication (DSRC) based on 802.11p has been mainly promoted. However, in recent years, "V2X based on LTE" as in-vehicle communication based on Long Term Evolution (LTE) has been standardized. In LTE-based V2X communication, the exchange of basic safety messages, etc. is supported. In recent years, in order to further improve V2X communication, NR V2X communication (NR: New Radio) using 5G technology has been studied.

[0079] Figure 3 is a diagram illustrating an example of a use case of V2X communication. Examples of use cases of V2V communication include forward approach warning, intersection collision avoidance, emergency vehicle warning, platooning, overtaking parking warning, road construction warning, etc. In addition, examples of use cases of V2I communication include notification of road safety information, traffic light cooperation, parking assistance, billing, etc. In addition, examples of use cases of V2P communication include warnings for vulnerable persons in traffic, etc. Examples of use cases of V2N communication include dynamic link sharing, remote driving, and indoor entertainment.

[0080] NR V2X communications enable new use cases that require high reliability, low latency, high-speed communications, and high capacity that LTE-based V2X was not previously able to support. Figure 3 Examples include providing dynamic maps, remote driving, etc. In addition, examples include sensor data sharing (where sensor data is exchanged between vehicles and roads and between vehicles) and platooning use cases for platooning. The use cases and requirements for NR V2X communication are described in 3GPP TR22.886, etc. The following (1) to (4) are brief explanations of some use cases.

[0081] (1) Vehicle formation

[0082] An example of a use case for NR V2X communication includes platooning. Platooning means that multiple vehicles form a line and travel in the same direction. Information controlling the platoon is exchanged between the vehicle leading the platoon and the other vehicles. NR V2X communication is used to exchange such information. By exchanging information using NR V2X communication, it is possible to further reduce the inter-vehicle distance for platooning.

[0083] (2) Extended Sensor

[0084] Examples of use cases for NR V2X communication include the exchange of sensor-related information (raw data before data processing and processed data). Sensor information is live video images collected by local sensors between surrounding vehicles, RSUs and pedestrians, V2X application servers, etc. By exchanging this information, the vehicle can obtain information that cannot be obtained through its own sensor information and can recognize / understand a wider range of environments. In this use case, a lot of information is required to be exchanged, so the communication requires a high data rate.

[0085] (3) Advanced Driving

[0086] Examples of use cases for NR V2X communication include semi-autonomous driving and fully autonomous driving. RSU shares recognition / understanding information obtained from its own sensors, etc. with surrounding vehicles. Therefore, each vehicle can adjust the trajectory and operation of the vehicle synchronously and coordinately. By using NR V2X communication, each vehicle can also share the purpose and intention of driving with surrounding vehicles.

[0087] (4) Remote driving

[0088] Examples of use cases for NR V2X communications include remote control via remote control and V2X applications. Remote control is used, for example, for people who cannot drive or are in dangerous areas. Cloud-based steering can also be used for public transportation where routes and roads are somewhat fixed. In such use cases, communications require high reliability and low transmission latency.

[0089] The use cases described above are merely examples, and use cases of V2X communication of this embodiment may be use cases other than these.

[0090] <1-3. Physical layer enhancement>

[0091] In order to achieve the above requirements, further enhancement of the physical layer from LTE V2X is required. Examples of target links include Uu link, which is a link between infrastructure such as base stations and RSUs and terminals, and PC5 link (side link), which is a link between terminals. The following (1) to (9) are examples of major enhancements.

[0092] (1) Channel format

[0093] (2) Sidelink feedback communication

[0094] (3) Sidelink Resource Allocation Method

[0095] (4) Vehicle position information estimation technology

[0096] (5) Relay communication between terminals

[0097] (6) Support for unicast and multicast communications

[0098] (7) Multi-carrier communication, carrier aggregation

[0099] (8) MIMO / Beamforming

[0100] (9) RF support (e.g. 6 GHz or higher)

[0101] Examples of channel format enhancements in (1) include flexible numerology, short transmission time interval (TTI), multi-antenna support, waveforms, etc. In addition, examples of enhancements to sidelink feedback communication in (2) include HARQ, channel state information (CSI), etc.

[0102] <1-4.V2X operation scenarios>

[0103] Next, an example of a V2X communication operation scenario will be described. In V2N communication, communication between a base station and a terminal is simple using only DL / UL communication, but in V2V communication, various communication paths can be considered. In the following explanation, each scenario will be explained using an example of V2V communication, but the same communication operation can be applied to V2P and V2I. In this case, the communication destination is not a vehicle, but a pedestrian or RSU.

[0104] (1) Scenario 1

[0105] Figure 4 is an example of V2V communication according to scenario 1. In scenario 1, the vehicle communicates directly with the vehicle using sidelink communication. A sidelink is a communication link between terminals (such as PC5). In addition to PC5, a sidelink is sometimes referred to as a V2V communication link, a V2P communication link, a V2I communication link, etc. Figure 4 In the example of , vehicles communicate directly with each other using sidelink communications without going through a radio access network. Figure 4 In the example of FIG. 1 , an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is illustrated as the radio access network, but the radio access network is not limited to the E-UTRAN.

[0106] (2) Scenario 2

[0107] Figure 5 An example of V2V communication according to scenario 2 is illustrated. In scenario 2, vehicles communicate with each other via a radio access network. Figure 5 In the example of , data is transmitted from one vehicle to multiple vehicles. Figure 5 In the Uu interface, Uu indicates a Uu interface. The Uu interface is a wireless interface between a terminal and a base station. UL indicates an uplink, and DL indicates a downlink. Figure 5 In the example of FIG. 1 , E-UTRAN is shown as the radio access network, but the radio access network is not limited to E-UTRAN.

[0108] (3) Scenario 3

[0109] Figure 6 is an example of V2V communication according to scenario 3. In scenario 3, vehicles communicate with each other through RSU and radio access network. Figure 6 In the example of , data is transmitted from one vehicle to multiple vehicles. Figure 6 In the example of , a vehicle and RSU are connected via sidelink communication. Figure 6 In the example of FIG. 1 , E-UTRAN is shown as the radio access network, but the radio access network is not limited to E-UTRAN.

[0110] (4) Scene 4

[0111] Figure 7 An example of V2V communication according to scenario 4 is illustrated. In scenario 4, vehicles communicate with each other through RSU and radio access network. Figure 7 In the example of , multiple vehicles and RSUs are connected via side link communication. Figure 7 In the example of FIG. 1 , E-UTRAN is shown as the radio access network, but the radio access network is not limited to E-UTRAN.

[0112] (5) Scene 5

[0113] Figure 8 An example of V2V communication according to scenario 5 is illustrated. In scenario 5, vehicles communicate with each other through RSUs without going through a radio access network. Figure 8 The RSU shown in FIG. 1 is a fixed station type RSU.

[0114] (6) Scene 6

[0115] Fig. 9 An example of V2V communication according to scenario 6 is illustrated. In scenario 6, vehicles communicate with each other through RSUs without going through a radio access network. Fig. 9 The RSU shown in FIG. 1 is a mobile station type RSU.

[0116] <1-5. Overview of this embodiment>

[0117] In conventional V2X communications, broadcasting has been used for sidelink communications. In this case, since the transmitting terminal cannot obtain feedback from the receiving terminal, reliability is improved by performing repeated transmission up to twice from the beginning. However, communication using such repeated transmission has two disadvantages.

[0118] The first problem is that repeated transmission uses more radio resources. In other words, resource utilization efficiency is not very good. The second problem is that even if repeated transmission is performed, it is impossible to confirm whether the transmitted packet has reached the sender. In other words, it is difficult to guarantee the reliability of communication. Compared with LTE V2X, NR V2X communication requires more stringent low latency and high reliability. Therefore, repeated transmission like LTE V2X is not expected.

[0119] On the other hand, in NR V2X communication, in addition to broadcast, unicast and multicast are also supported. Unlike broadcast, unicast and multicast transmit data to a specific receiver. Therefore, the sender terminal can easily obtain feedback from the receiver terminal. Therefore, in NR V2X communication, in order to improve the efficiency of radio resources and the reliability of side link communication in unicast and multicast, HARQ feedback is introduced. However, the transmission of HARQ feedback has the following problems (1) to (7), for example.

[0120] (1) The transmission of HARQ feedback may conflict with another data transmission / reception.

[0121] (2) When the data transmitter receives the HARQ feedback of the data receiver, when the HARQ feedback is NACK, the data transmitter retransmits the data to the data receiver. In this case, since the HARQ feedback and retransmission take time, the low delay requirement (hereinafter referred to as delay requirement) for side link communication may not be met.

[0122] (3) It is difficult to ensure resources for HARQ feedback during congestion.

[0123] (4) Since the data receiver sends HARQ feedback, it is impossible to transmit and receive its own data at the timing of sending the HARQ feedback.

[0124] (5) Since the data transmitter receives the HARQ feedback, it is impossible to transmit and receive its own data at the time of receiving the HARQ feedback.

[0125] (6) In multicast (also called groupcast), when a data transmitter retransmits data until a receiver receives all the data, a lot of radio resources are used for the retransmission.

[0126] (7) In multicast, when the group members of the multicast frequently change, it is difficult to perform retransmission through HARQ feedback.

[0127] That is, when the data receiver is configured to continuously send HARQ feedback to the data transmitter, communication performance may deteriorate depending on communication aspects. Therefore, in this embodiment, the inventors propose a mechanism for enabling or disabling HARQ feedback from the data receiver according to communication aspects.

[0128] For example, the information processing device of this embodiment obtains information about the side link communication (for example, information indicating the degree of congestion of the communication). The information processing device is, for example, a communication device of a base station device or a data transmitter. Then, the information processing device determines whether to enable HARQ feedback in the side link communication based on the information about the side link communication.

[0129] Therefore, depending on the communication aspect (eg, communication congestion status), the HARQ feedback of the communication device of the receiver is enabled or disabled, thereby achieving high communication performance in the sidelink communication.

[0130] <<2. Information Processing System Configuration>>

[0131] Hereinafter, an information processing system 1 according to an embodiment of the present disclosure will be described. The information processing system 1 is a mobile communication system including a plurality of communication devices (mobile devices, terminal devices) capable of performing sidelink communication. The communication devices can use HARQ in sidelink communication.

[0132] The information processing system 1 is a radio communication system using a predetermined radio access technology (RAT). For example, the information processing system 1 is a cellular communication system using a radio access technology such as wideband code division multiple access (W-CDMA), code division multiple access 2000 (cdma2000), long term evolution (LTE), and new radio (NR). At this time, the cellular communication system is not limited to a mobile phone communication system, and may be, for example, an intelligent transportation system (ITS). The information processing system 1 is not limited to a cellular communication system, and may be, for example, other radio communication systems such as a radio local area network (LAN) system, an aeronautical radio system, and a space radio communication system.

[0133] The information processing system 1 provides an application processing execution function (e.g., edge function) to a mobile device through a radio network using a radio access technology such as LTE and NR. LTE and NR are types of cellular communication technologies, and enable mobile communication of mobile devices by deploying multiple areas covered by base station devices in a cell manner.

[0134] In the following explanation, "LTE" includes LTE-Advanced (LTE-A), LTE-Advanced Pro (LTE-A Pro), and Evolved Universal Terrestrial Radio Access (EUTRA). In addition, NR includes New Radio Access Technology (NRAT) and Further EUTRA (FEUTRA). A single base station can manage multiple cells. A cell supporting LTE is sometimes referred to as an LTE cell. In addition, a cell supporting NR is sometimes referred to as an NR cell.

[0135] NR is the next (fifth) generation of LTE radio access technology (RAT). NR is a radio access technology that can support a variety of use cases, including enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable and low-latency communications (URLLC). NR is being studied for the technical framework to support usage scenarios, requirements, and deployment scenarios in these use cases.

[0136] An LTE base station may be referred to as an evolved Node B (eNodeB) or eNB. Also, an NR base station may be referred to as a gNodeB or gNB. In LTE and NR, a mobile device may be referred to as a user equipment (UE).

[0137] <2-1. Overall configuration of information processing system>

[0138] Fig.10 1 is a diagram illustrating a configuration example of an information processing system 1 according to an embodiment of the present disclosure. The information processing system 1 includes a management device 10, a base station device 20, a base station device 30, a terminal device 40, and a mobile device 50. In addition, Fig.11 is a diagram illustrating a specific configuration example of the information processing system 1. The information processing system 1 may include a cloud server device CS in addition to the above-described configuration.

[0139] The network N1 is composed of a plurality of devices constituting the information processing system 1. The network N1 is, for example, a radio network. For example, the network N1 is a mobile communication network configured using a radio access technology such as LTE and NR. The network N1 is composed of a radio access network RAN ​​and a core network CN.

[0140] The devices in the figure can be considered as devices in a logical sense. In other words, some of the devices in the figure are implemented by virtual machines (VMs), containers, dockers, etc., and they can be implemented on the same physically identical hardware.

[0141] [Cloud Server Equipment]

[0142] The cloud server device CS is a processing device (e.g., a server device) connected to the network N2. For example, the cloud server device CS is a server host computer that processes requests from a client computer (e.g., a mobile device 50). The cloud server device CS may be a PC server, a medium-sized server, or a mainframe server. Here, the network N2 is a communication network connected to the network N1 via a gateway device (e.g., an S-GW or a P-GW). For example, the network N2 is, for example, a communication network such as the Internet, a regional Internet Protocol (IP) network, and a telephone network (e.g., a fixed telephone network and a mobile phone network). The cloud server device may be renamed a server device, a processing device, or an information processing device.

[0143] [Management equipment]

[0144] The management device 10 is a device for managing a radio network. For example, the management device 10 is a device used as a mobility management entity (MME) or an access and mobility management function (AMF). The management device 10 and the gateway device constitute part of a core network CN. The core network CN is a network owned by a predetermined entity (such as a mobile network operator). For example, the core network CN is an evolved packet core (EPC) or a 5G core network (5GC). The predetermined entity may be the same as the entity that uses, operates and / or manages the base station devices 20 and 30, or may be different.

[0145] The management device 10 may have a gateway function. For example, when the core network is EPC, the management device 10 may have a function as an S-GW or P-GW. In addition, when the core network is 5GC, the management device 10 may have a function as a user plane function (UPF). The management device 10 does not necessarily have to be a device constituting the core network CN. For example, it is assumed that the core network CN is a core network of Wideband Code Division Multiple Access (W-CDMA) or Code Division Multiple Access 2000 (cdma2000). At this time, the management device 10 may be a device used as a radio network controller (RNC).

[0146] The management device 10 is connected to each of the plurality of base station devices 20 and the plurality of base station devices 30. The management device 10 manages the communication with the base station devices 20 and the base station devices 30. For example, the management device 10 grasps and manages which base station device (or which cell) the mobile device 50 in the network N1 is connected to, which base station device (or cell) the mobile device 50 is in the communication area of, and the like for each mobile device 50. The cell is, for example, a primary cell (pCell) or a secondary cell (sCell). For each cell, the cell may have different radio resources (e.g., frequency channels, component carriers, etc.) that can be used by the mobile device 50. Moreover, one base station device may provide a plurality of cells.

[0147] [Base station equipment]

[0148] The base station device 20 is a radio communication device that radio communicates with the terminal device 40 and the mobile device 50. The base station device 20 is a device that constitutes a network in V2N communication. The base station device 20 is a type of communication device. The base station device 20 is, for example, a device corresponding to a radio base station (base station, node B, eNB, gNB, etc.) or a radio access point. The base station device 20 may be a radio relay station. The base station device 20 may be an optical remote device referred to as a remote radio head (RRH). In the present embodiment, the base station of the radio communication system may be referred to as a base station device. The base station device 20 may be configured to be able to radio communicate with another base station device 20 and a base station device 30. The radio access technology used by the base station device 20 may be a cellular communication technology or a radio LAN technology. Of course, the radio access technology used by the base station device 20 is not limited to these, and may be another radio access technology. In addition, the radio communication used by the base station device 20 may be a radio communication using radio waves, or a radio communication (optical radio) using infrared or visible light.

[0149] The base station device 30 is a radio communication device that radio communicates with the terminal device 40 and the mobile device 50. It is a device that constitutes the infrastructure in the V2I communication. The base station device 30 is a type of communication device like the base station device 20. The base station device 30 is, for example, a device corresponding to a radio base station (base station, node B, eNB, gNB, etc.) or a radio access point. The base station device 30 may be a radio relay station. The base station device 30 may be a road base station device such as a roadside unit (RSU). In addition, the base station device 20 may be an optical remote device referred to as a remote radio head (RRH). The base station device 30 may be configured to be able to radio communicate with another base station device 30 and the base station device 20. The radio access technology used by the base station device 30 may be a cellular communication technology or a radio LAN technology. Of course, the radio access technology used by the base station device 20 is not limited to these, and may be another radio access technology. In addition, the radio communication used by the base station device 30 may be a radio communication using radio waves, or a radio communication (optical radio) using infrared or visible light.

[0150] Base station devices 20 and 30 may be able to communicate with each other via an interface (e.g., S1 interface) between the base station device and the core network. This interface may be wired or wireless. In addition, the base station devices may be able to communicate with each other via an interface (e.g., X2 interface, S1 interface, etc.) between the base station devices. This interface may be wired or wireless.

[0151] Base station devices 20 and 30 can be used, operated and / or managed by various entities. For example, it can be assumed that examples of entities include mobile network operators (MNOs), mobile virtual network operators (MVNOs), mobile virtual network enablers (MVNEs), neutral host networks (NHN) operators, enterprises, educational institutions (school corporations, local government education committees, etc.), real estate (buildings, apartments, etc.) administrators, individuals, etc. Of course, the use, operation and / or management of base station devices 20 and 30 are not limited to these. Base station devices 20 and 30 can be installed and / or operated by one operator, or can be installed and / or operated by one individual. Of course, the installation / operation entity of base station device 20 is not limited to these. For example, base station devices 20 and 30 can be installed and operated by multiple operators or multiple individuals. In addition, base station devices 20 and 30 can be shared facilities used by multiple operators or multiple individuals. In this case, the installation and / or operation of the facility can be performed by a third party different from the user.

[0152] The concept of base station equipment (also called base station) includes not only donor base stations, but also relay base stations (also called relay stations or relay station equipment). In addition, the concept of base station includes not only structures with base station functions, but also equipment installed in the structure. Structures are, for example, buildings, such as high-rise buildings, houses, steel towers, station facilities, airport facilities, port facilities or stadiums. In addition, the concept of structure includes not only buildings, but also non-building structures, such as tunnels, bridges, dams, fences and iron pillars, and facilities such as cranes, doors and wind turbines. The concept of structure includes not only structures on land (ground in a narrow sense) or underground, but also structures on water (such as docks and giant buoys), and underwater structures (such as ocean observation facilities). Base station equipment can be renamed as processing equipment or information processing equipment.

[0153] The base station devices 20 and 30 may be fixed stations, or may be base station devices (mobile stations) of a movable configuration. For example, the base station devices 20 and 30 may be devices installed on a mobile body or may be the mobile body itself. For example, a relay station device having mobility may be regarded as the base station devices 20 and 30 as mobile stations. Moreover, a device having a base station device function (at least a part of the base station device function) (such as a vehicle, a drone, a smart phone, etc., which is originally a device having mobility) also corresponds to the base station devices 20 and 30 as mobile stations.

[0154] Here, the mobile body may be a mobile terminal such as a smart phone or a mobile phone. In addition, the mobile body may be a mobile body that moves on land (ground in a narrow sense) (for example, vehicles such as cars, bicycles, buses, trucks, motorcycles, trains, linear motor vehicles, etc.), or may be a mobile body that moves underground (for example, in a tunnel) (for example, a subway). In addition, the mobile body may be a mobile body that moves on water (for example, ships such as passenger ships, cargo ships, or hovercrafts), or may be a mobile body that moves underwater (for example, submersible ships such as submersibles, submarines, or unmanned submarines). In addition, the mobile body may be a mobile body that moves in the atmosphere (for example, aircraft such as airplanes, airships, or drones), or may be a mobile body that moves outside the atmosphere (for example, artificial celestial bodies such as artificial satellites, spacecraft, space stations, or space research vehicles).

[0155] In addition, the base station devices 20 and 30 can be ground base station devices (ground station devices) installed on the ground. For example, the base station devices 20 and 30 can be base station devices deployed in a structure on the ground, or can be base station devices installed in a mobile body moving on the ground. More specifically, the base station devices 20 and 30 can be antennas installed in structures such as buildings and signal processing devices connected to the antennas. Of course, the base station devices 20 and 30 can be structures or mobile bodies themselves. "Ground" refers not only to land (ground in a narrow sense), but also to the ground in a broad sense, including underground, above water and underwater. The base station devices 20 and 30 are not limited to ground base station devices. The base station devices 20 and 30 can be non-ground base station devices (non-ground station devices) that can float in the air or in space. For example, the base station devices 20 and 30 can be aircraft station devices or satellite station devices.

[0156] Aircraft station equipment is a radio communication device that can float in the atmosphere, such as an airplane. Aircraft station equipment can be equipment installed on an aircraft, etc., or it can be the aircraft itself. The concept of aircraft includes not only heavy aircraft such as airplanes and gliders, but also light aircraft such as balloons and airships. The concept of aircraft includes not only heavy aircraft and light aircraft, but also rotorcraft, such as helicopters and gyroplanes. Aircraft station equipment (or an aircraft on which aircraft station equipment is installed) can be an unmanned aerial vehicle, such as a drone. In addition, the concept of unmanned aerial vehicles includes unmanned aerial vehicle systems (UAS) and tethered UAS. Moreover, the concept of unmanned aerial vehicles includes lighter than aerial UAS (LTA) and heavier than aerial UAS (HTA). In addition, the concept of unmanned aerial vehicles also includes high-altitude UAS platforms (HAP).

[0157] Satellite station equipment is a radio communication device that can float outside the atmosphere. Satellite station equipment can be equipment installed on a space mobile body such as an artificial satellite, or it can be the space mobile body itself. The satellite used as a satellite station equipment can be any one of a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, and a high elliptical orbit (HEO) satellite. Of course, the satellite station equipment can be equipment installed on a low earth orbit satellite, a medium earth orbit satellite, a geostationary earth orbit satellite, or a high elliptical orbit satellite.

[0158] The size of the coverage of the base station devices 20 and 30 can be as large as a macro cell, or as small as a pico cell. Of course, the size of the coverage of the base station devices 20 and 30 can be very small, such as a femto cell. In addition, the base station devices 20 and 30 can have beamforming capabilities. In this case, the base station devices 20 and 30 can have a cell or service area formed for each beam.

[0159] [Terminal equipment and mobile devices]

[0160] The terminal device 40 is a wireless communication device that wirelessly communicates with the base station device 20 or the base station device 30. The terminal device 40 is, for example, a mobile phone, a smart device (smart phone or tablet), a personal digital assistant (PDA), and a personal computer. The mobile device 50 may be a machine-to-machine (M2M) device or an Internet of Things (IoT) device. The terminal device 40 is capable of performing side link communication with the mobile device 50 and another terminal device 40. When performing side link communication, the terminal device 40 may use an automatic retransmission technology such as HARQ. The radio communication (including side link communication) used by the terminal device 40 may be a radio communication using radio waves, or may be a radio communication (optical radio) using infrared or visible light.

[0161] The mobile device 50 is a mobile radio communication device that radio communicates with the base station device 20 or the base station device 20. The mobile device 50 may be a radio communication device installed on a mobile body, or may be the mobile body itself. For example, the mobile device 50 may be a vehicle (such as a car, bus, truck, or motorcycle) that moves on a road, or a radio communication device installed on a vehicle. The mobile device 50 is capable of performing side link communication with the terminal device 40 and another mobile device 50. When performing side link communication, the mobile device 50 may use an automatic retransmission technology such as HARQ. The radio communication (including side link communication) used by the mobile device 50 may be a radio communication using radio waves, or may be a radio communication (optical radio) using infrared or visible light.

[0162] A “mobile device” is a type of communication device, and is also referred to as a mobile station, a mobile station device, a terminal device, or a terminal. The concept of a “mobile device” includes not only a communication device configured to be movable, but also a mobile body in which the communication device is installed. At this time, the mobile body may be a mobile terminal, or may be a mobile body that moves on land (ground in a narrow sense), underground, on water, or underwater. In addition, the mobile body may be a mobile body that moves in the atmosphere (such as a drone or a helicopter), or may be a mobile body that moves outside the atmosphere (such as an artificial satellite).

[0163] In this embodiment, the concept of communication equipment includes not only portable mobile devices (terminal equipment) such as mobile terminals, but also equipment installed on structures or mobile bodies. The structure or mobile body itself can be regarded as a communication device. In addition, the concept of communication equipment includes not only mobile devices (terminal equipment, automobiles, etc.), but also base station equipment (donor base station, relay base station, etc.). Communication equipment is a type of processing equipment and information processing equipment.

[0164] The mobile device 50 and the terminal device 40 and the base station devices 20 and 30 are connected to each other through radio communication (e.g., radio waves or optical radio). When the mobile device 50 moves from the communication area (or cell) of one base station device to the communication area (or cell) of another base station device, it performs handover (or switching).

[0165] The mobile device 50 and the terminal device 40 can be connected to multiple base station devices or multiple cells at the same time to perform communication. For example, when a base station device supports the communication area of ​​multiple cells (e.g., pCell, sCell) using carrier aggregation (CA) technology, dual connectivity (DC) technology, and multi-connectivity (MC) technology, it is possible to bundle multiple cells to perform communication between the mobile device 50 and the base station device (or between the terminal device 40 and the base station device). Alternatively, via the cells of different base station devices, by using coordinated multi-point transmission and reception (CoMP) technology, the mobile device 50 and the terminal device 40 may also communicate with multiple base station devices.

[0166] The mobile device 50 and the terminal device 40 do not necessarily have to be devices that people use directly. The mobile device 5 and the terminal device 400 may be sensors installed in machines in factories, etc., such as so-called machine type communications (MTC). In addition, the mobile device 50 may be a machine-to-machine (M2M) device or an Internet of Things (IoT) device. In addition, the mobile device 50 and the terminal device 40 may be devices with relay communication functions, such as those represented by device-to-device (D2D) and vehicle-to-everything (V2X). In addition, the mobile device 50 and the terminal device 40 may be devices called client equipment (CPE) used in radio backhaul, etc.

[0167] Hereinafter, the configuration of each device constituting the information processing system 1 according to the present embodiment will be described in detail.

[0168] <2-2. Configuration of management equipment>

[0169] The management device 10 is a device that manages a radio network. For example, the management device 10 is a device that manages communications of the base station devices 20 and 30. When the core network CN is EPC, the management device 10 is, for example, a device that has a function as an MME. In addition, when the core network CN is 5GC, the management device 10 is, for example, a device that has a function as an AMF. The management device 10 has an application processing execution function (for example, an edge function) and can be used as a server device (such as an application server).

[0170] Fig.12 1 is a diagram illustrating a configuration example of a management device 10 according to an embodiment of the present disclosure. The management device 10 includes a network communication unit 11 , a storage unit 12 , and a control unit 13 . Fig.12 The configuration shown in is a functional configuration, and the hardware configuration may be different from this. In addition, the functions of the management device 10 may be distributed and implemented in a plurality of physically separated configurations. For example, the management device 10 may be composed of a plurality of server devices.

[0171] The network communication unit 11 is a communication interface for communicating with other devices. The network communication unit 11 may be a network interface or an equipment connection interface. The network communication unit 11 has a function of connecting it directly or indirectly to the network N1. For example, the network communication unit 11 may include a local area network (LAN) interface (such as a network interface card (NIC)), or may include a USB interface, a USB port, etc. composed of a universal serial bus (USB) host controller. In addition, the network communication unit 11 may be a wired interface or a wireless interface. The network communication unit 11 is used as a communication device for the management device 10. The network communication unit 11 communicates with the base station devices 20 and 30 under the control of the control unit 13.

[0172] The storage unit 12 is a data readable / writable storage device such as a dynamic random access memory (DRAM), a static random access memory (SRAM), a flash memory, and a hard disk. The storage unit 12 is used as a storage device for the management device 10. The storage unit 12 stores, for example, the connection state of the mobile device 50. For example, the storage unit 12 stores the radio resource control (RRC) state and the EPS connection management (ECM) state of the mobile device 50. The storage unit 12 can be used as a home storage for storing location information of the mobile device 50.

[0173] The control unit 13 is a controller that controls each unit of the management device 10. The control unit 13 is implemented by, for example, a processor such as a central processing unit (CPU) or a microprocessing unit (MPU). For example, the control unit 13 is implemented by the processor executing various programs stored in a storage device within the management device 10 using a random access memory (RAM) or the like as a work area. The control unit 13 can be implemented by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0174] <2-3. Configuration of base station equipment (network)>

[0175] Next, the configuration of the base station device 20 will be described. The base station device 20 is a radio communication device that radio communicates with the mobile device 50. The base station device 20 is a device used as, for example, a radio base station, a radio relay station, a radio access point, etc. At this time, the base station device 20 may be an optical remote device such as an RRH. As described above, the base station device 20 is a device that constitutes a network in V2N communication.

[0176] Fig.13 2 is a diagram illustrating a configuration example of a base station device 20 according to an embodiment of the present disclosure. The base station device 20 includes a radio communication unit 21, a storage unit 22, a network communication unit 23, and a control unit 24. Fig.13 The configuration shown in is a functional configuration, and the hardware configuration may be different from this. In addition, the functions of the base station device 20 may be distributed and implemented in a plurality of physically separated configurations.

[0177] The radio communication unit 21 is a radio communication interface for radio communication with other radio communication devices (e.g., mobile device 50, base station device 30, and another base station device 20). The radio communication unit 21 operates under the control of the control unit 24. The radio communication unit 21 can support multiple radio access modes. For example, the radio communication unit 21 can support both NR and LTE. In addition to NR and LTE, the radio communication unit 21 can also support W-CDMA or cdma2000. Of course, the wireless communication unit 21 can support radio access modes other than NR, LTE, W-CDMA, and cdma2000.

[0178] The radio communication unit 21 includes a reception processing unit 211, a transmission processing unit 212, and an antenna 213. The radio communication unit 21 may include a plurality of reception processing units 211, transmission processing units 212, and antennas 213. When the radio communication unit 21 supports a plurality of radio access modes, each unit of the radio communication unit 21 may be configured separately for each radio access mode. For example, the reception processing unit 211 and the transmission processing unit 212 may be configured separately by LTE and NR.

[0179] The reception processing unit 211 processes an uplink signal received via the antenna 213. The reception processing unit 211 includes a radio reception unit 211a, a demultiplexing unit 211b, a demodulation unit 211c, and a decoding unit 211d.

[0180] The radio receiving unit 211a performs down-conversion, removal of unnecessary frequency components, control of amplification level, orthogonal demodulation, conversion into digital signals, removal of guard intervals, extraction of frequency domain signals by fast Fourier transform, etc. on the uplink signal. The demultiplexing unit 211b separates uplink channels such as physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) and uplink reference signals from the signal output from the radio receiving unit 211a. The demodulation unit 211c demodulates the received signal using a modulation system such as binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK) for modulation symbols of the uplink channel. The modulation system used by the demodulation unit 211c can be 16 quadrature amplitude modulation (QAM), 64QAM or 256QAM. The decoding unit 211d performs decoding processing on the coded bits of the demodulated uplink channel. The decoded uplink data and uplink control information are output to the control unit 24.

[0181] The transmission processing unit 212 performs transmission processing of downlink control information and downlink data. The transmission processing unit 212 includes a coding unit 212a, a modulation unit 212b, a multiplexing unit 212c, and a radio transmission unit 212d.

[0182] The coding unit 212a encodes the downlink control information and downlink data input from the control unit 24 by using a coding method such as block coding, convolution coding or turbo coding. The modulation unit 212b modulates the coded bits output from the coding unit 212a by a predetermined modulation system such as BPSK, QPSK, 16QAM, 64QAM, 256QAM, etc. The multiplexing unit 212c multiplexes the modulation symbols and downlink reference signals of each channel and arranges them in a predetermined resource element. The radio transmission unit 212d performs various signal processing on the signal from the multiplexing unit 212c. For example, the radio transmission unit 212d performs processing such as conversion to the time domain by fast Fourier transform, increase of the guard interval, generation of the baseband digital signal, conversion to the analog signal, orthogonal modulation, up-conversion, removal of the additional frequency component and power amplification. The signal generated by the transmission processing unit 212 is transmitted from the antenna 213.

[0183] The storage unit 22 is a storage device that can read and write data, such as DRAM, SRAM, flash memory, and hard disk. The storage unit 22 is used as a storage device of the base station device 20. The storage unit 22 stores side link information, etc. The side link information is information about the side link between the communication devices. The side link information will be described later.

[0184] The network communication unit 23 is a communication interface for communicating with other devices (e.g., the management device 10, another base station device 20, the base station device 30, the cloud server device CS, etc.). The network communication unit 23 has a function of connecting it directly or indirectly to the network N1. For example, the network communication unit 23 includes a LAN interface such as a NIC. In addition, the network communication unit 23 can be a wired interface or a wireless interface. The network communication unit 23 serves as a network communication device of the base station device 20. The network communication unit 23 communicates with other devices (e.g., the management device 10, the cloud server device CS, etc.) under the control of the control unit 24. The configuration of the network communication unit 23 can be the same as the configuration of the network communication unit 11 of the management device 10.

[0185] The control unit 24 is a controller that controls each unit of the base station device 20. The control unit 24 is implemented by a processor such as a central processing unit (CPU) or a microprocessing unit (MPU), for example. For example, the control unit 24 is implemented by the processor executing various programs stored in a storage device within the base station device 20 using a random access memory (RAM) or the like as a work area. The control unit 24 can be implemented by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0186] like Fig.13 As shown in , the control unit 24 includes an acquisition unit 241, a discrimination unit 242, a notification unit 243 and a communication control unit 244. Each block (acquisition unit 241 to communication control unit 244) constituting the control unit 24 is a functional block indicating the function of the control unit 24. These functional blocks can be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks can be a software module implemented by software (including microprograms), or can be a circuit block on a semiconductor chip (die). Of course, each functional block can be a processor or an integrated circuit. The method of configuring the functional blocks is arbitrary. The control unit 24 can be configured as a functional unit different from the above-mentioned functional blocks. The operation of each block (acquisition unit 241 to communication control unit 244) constituting the control unit 24 will be described in detail later.

[0187] <2-4. Configuration of base station equipment (infrastructure)>

[0188] Next, the configuration of the base station device 30 will be described. The base station device 30 is a wireless communication device that performs wireless communication with the mobile device 50. The base station device 30 is a device used as, for example, a radio base station, a radio relay station, a radio access point, etc. At this time, the base station device 30 may be a road base station device such as an RSU, or an optical remote device such as an RRH. As described above, the base station device 30 is a device that constitutes the infrastructure in V2I communication.

[0189] Fig.14 3 is a diagram illustrating a configuration example of a base station device 30 according to an embodiment of the present disclosure. The base station device 30 includes a radio communication unit 31, a storage unit 32, a network communication unit 33, and a control unit 34. Fig.14 The configuration shown in is a functional configuration, and the hardware configuration may be different from this. In addition, the functions of the base station device 30 may be distributed and implemented in a plurality of physically separated configurations.

[0190] The radio communication unit 31 is a radio communication interface for radio communication with other radio communication devices (e.g., the mobile device 50, the base station device 20, and another base station device 30). The radio communication unit 31 operates under the control of the control unit 34. The radio communication unit 31 includes a reception processing unit 311, a transmission processing unit 312, and an antenna 313. The configuration of the radio communication unit 31 (reception processing unit 311, transmission processing unit 312, and antenna 313) is the same as the configuration of the radio communication unit 21 (reception processing unit 211, transmission processing unit 212, and antenna 213) of the base station device 20.

[0191] The storage unit 32 is a storage device that can read and write data, such as DRAM, SRAM, flash memory, and hard disk. The storage unit 32 is used as a storage device of the base station device 30. The configuration of the storage unit 32 is the same as that of the storage unit 22 of the base station device 20.

[0192] The network communication unit 33 is a communication interface for communicating with other devices (e.g., the management device 10, the base station device 20, another base station device 30, the cloud server device CS, etc.). The network communication unit 33 has a function of connecting it directly or indirectly to the network N1. For example, the network communication unit 33 includes a LAN interface such as a NIC. In addition, the network communication unit 33 can be a wired interface or a wireless interface. The network communication unit 33 serves as a network communication device of the base station device 30. The configuration of the network communication unit 33 is the same as that of the network communication unit 23 of the base station device 20.

[0193] The control unit 34 is a controller that controls each unit of the base station device 30. The control unit 34 is implemented by a processor such as a CPU or an MPU, for example. For example, the control unit 34 is implemented by the processor executing various programs stored in a storage device within the base station device 30 using a RAM or the like as a work area. The control unit 34 can be implemented by an integrated circuit such as an ASIC or an FPGA. CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0194] like Fig.14 As shown in , the control unit 34 includes an acquisition unit 341, a discrimination unit 342, a notification unit 343, and a communication control unit 344. Each block (acquisition unit 341 to communication control unit 344) constituting the control unit 34 is a functional block indicating the function of the control unit 34. These functional blocks may be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks may be a software module implemented by software (including microprograms), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The method of configuring the functional blocks is arbitrary. The control unit 34 may be configured as a functional unit different from the above-mentioned functional blocks. The operation of each block of the control unit 34 may be the same as the operation of each block (acquisition unit 241 to communication control unit 244) of the control unit 24 described later. The description of the acquisition unit 241 to the communication control unit 244 appearing in the following description may be appropriately replaced by the acquisition unit 341 to the communication control unit 344.

[0195] <2-5. Configuration of terminal equipment>

[0196] Next, the configuration of the terminal device 40 will be described. The terminal device 40 is a mobile radio communication device. For example, the terminal device 40 may be a user terminal such as a mobile phone or a smart device. The terminal device 40 is capable of performing radio communication with the base station device 20 and the base station device 30. In addition, the terminal device 40 is capable of performing side link communication with the mobile device 50 and another terminal device 40. At this time, the terminal device 40 may use an automatic retransmission technology such as HARQ.

[0197] Fig.15 4 is a diagram illustrating a configuration example of a terminal device 40 according to an embodiment of the present disclosure. The terminal device 40 includes a radio communication unit 41, a storage unit 42, a network communication unit 43, an input / output unit 44, and a control unit 45. Fig.15 The configuration shown in is a functional configuration, and the hardware configuration may be different from this. In addition, the functions of the terminal device 40 may be distributed and implemented in a variety of physically separated configurations.

[0198] The radio communication unit 41 is a radio communication interface for radio communication with other radio communication devices (e.g., base station device 20 and base station device 30). The wireless communication unit 41 operates under the control of the control unit 45. The radio communication unit 41 supports one or more radio access modes. For example, the radio communication unit 41 supports both NR and LTE. In addition to NR and LTE, the radio communication unit 41 can also support W-CDMA and cdma2000. In addition, the radio communication unit 21 supports communication using NOMA. NOMA will be described in detail later.

[0199] The radio communication unit 41 includes a reception processing unit 411, a transmission processing unit 412, and an antenna 413. The radio communication unit 41 may include a plurality of reception processing units 411, transmission processing units 412, and antennas 413. When the radio communication unit 41 supports multiple radio access modes, each unit of the radio communication unit 41 may be configured separately for each radio access mode. For example, the reception processing unit 411 and the transmission processing unit 412 may be configured separately by LTE and NR.

[0200] The reception processing unit 411 processes a downlink signal received via the antenna 413. The reception processing unit 411 includes a radio reception unit 411a, a demultiplexing unit 411b, a demodulation unit 411c, and a decoding unit 411d.

[0201] The radio receiving unit 411a performs down-conversion, removes unnecessary frequency components, controls amplification levels, orthogonal demodulation, converts to digital signals, removes guard intervals, extracts frequency domain signals by fast Fourier transform, etc. on the downlink signal. The demultiplexing unit 411b separates the downlink channel, the downlink synchronization signal, and the downlink reference signal from the signal output from the wireless receiving unit 411a. The downlink channel is, for example, a physical broadcast channel (PBCH), a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), etc. The demodulation unit 211c demodulates the received signal using a modulation system such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM for the modulation codewords of the downlink channel. The decoding unit 411d performs decoding processing on the coded bits of the demodulated downlink channel. The decoded downlink data and downlink control information are output to the control unit 45.

[0202] The transmission processing unit 412 performs transmission processing of uplink control information and uplink data. The transmission processing unit 412 includes a coding unit 412a, a modulation unit 412b, a multiplexing unit 412c, and a radio transmission unit 412d.

[0203] The coding unit 412a encodes the uplink control information and uplink data input from the control unit 45 by using a coding method such as block coding, convolution coding or turbo coding. The modulation unit 412b modulates the coded bits output from the coding unit 412a by a predetermined modulation system such as BPSK, QPSK, 16QAM, 64QAM, 256QAM, etc. The multiplexing unit 412c multiplexes the modulation symbols and uplink reference signals of each channel and arranges them in a predetermined resource element. The radio transmission unit 412d performs various signal processing on the signal from the multiplexing unit 412c. For example, the radio transmission unit 412d performs processing such as conversion to the time domain by inverse fast Fourier transform, increase of the guard interval, generation of the baseband digital signal, conversion to the analog signal, orthogonal modulation, up-conversion, removal of the additional frequency component and power amplification. The signal generated by the transmission processing unit 412 is transmitted from the antenna 413.

[0204] The storage unit 42 is a storage device that can read and write data, such as a DRAM, an SRAM, a flash memory, and a hard disk. The storage unit 42 serves as a storage device of the terminal device 40.

[0205] The network communication unit 43 is a communication interface for communicating with other devices. For example, the network communication unit 43 is a LAN interface such as a NIC. The network communication unit 43 has a function of connecting it directly or indirectly to the network N1. The network communication unit 43 can be a wired interface or a wireless interface. The network communication unit 43 is used as a network communication device of the terminal device 40. The network communication unit 43 communicates with other devices under the control of the control unit 45.

[0206] The input / output unit 44 is a user interface for exchanging information with a user. For example, the input / output unit 44 is an operating device for the user to perform various operations, such as a keyboard, a mouse, an operating key, and a touch panel. Alternatively, the input / output unit 44 is a display device, such as a liquid crystal display or an organic electroluminescent (EL) display. The input / output unit 44 can be an audio device, such as a speaker or a buzzer. In addition, the input / output unit 44 can be a lighting device, such as a light emitting diode (LED) lamp. The input / output unit 44 is used as an input / output device (input device, output device, operating device, or notification device) of the terminal device 40.

[0207] The control unit 45 is a controller that controls each unit of the terminal device 40. The control unit 45 is implemented by a processor such as a CPU or an MPU, for example. For example, the control unit 45 is implemented by the processor executing various programs stored in a storage device within the terminal device 40 using a RAM or the like as a work area. The control unit 45 can be implemented by an integrated circuit such as an ASIC or an FPGA. CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0208] like Fig.15 As shown in , the control unit 45 includes an acquisition unit 451, a discrimination unit 452, a notification unit 453, and a communication control unit 454. Each block (acquisition unit 451 to communication control unit 454) constituting the control unit 45 is a functional block indicating the function of the control unit 45. These functional blocks may be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks may be a software module implemented by software (including microprograms), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The method of configuring the functional blocks is arbitrary. The control unit 45 may be configured as a functional unit different from the above-mentioned functional blocks. The operation of each block constituting the control unit 45 may be the same as the operation of each block (acquisition unit 551 to communication control unit 554) of the control unit 45 described later. The description of the acquisition unit 551 to the communication control unit 554 appearing in the following description may be appropriately replaced by the acquisition unit 451 to the communication control unit 454.

[0209] <2-6. Configuration of mobile devices>

[0210] Next, the configuration of the mobile device 50 will be described. The mobile device 50 is a mobile radio communication device. For example, the mobile device 50 is a vehicle such as a car, or a radio communication device installed on a vehicle. The mobile device 50 may be a mobile terminal device such as a mobile phone or a smart device. The mobile device 50 is capable of performing radio communication with the base station device 20 and the base station device 30. In addition, the mobile device 50 is capable of performing side link communication with the terminal device 40 and another mobile device 50. At this time, the mobile device 50 may use an automatic retransmission technology such as HARQ.

[0211] Fig.16 is a diagram illustrating a configuration example of a mobile device 50 according to an embodiment of the present disclosure. The mobile device 50 includes a radio communication unit 51 , a storage unit 52 , a network communication unit 53 , an input / output unit 54 , and a control unit 55 . Fig.16 The configuration shown in is a functional configuration, and the hardware configuration may be different from this. Moreover, the functions of the mobile device 50 may be distributed and implemented in a variety of physically separated configurations.

[0212] The radio communication unit 51 is a radio communication interface for radio communication with other radio communication devices (e.g., base station device 20 and base station device 30). The wireless communication unit 51 operates under the control of the control unit 55. The radio communication unit 51 supports one or more radio access modes. For example, the radio communication unit 51 supports both NR and LTE. In addition to NR and LTE, the radio communication unit 51 can also support W-CDMA or cdma2000. In addition, the radio communication unit 21 supports communication using NOMA. NOMA will be described in detail later.

[0213] The radio communication unit 51 includes a reception processing unit 511, a transmission processing unit 512, and an antenna 513. The radio communication unit 51 may include a plurality of reception processing units 511, transmission processing units 512, and antennas 513. When the radio communication unit 51 supports a plurality of radio access modes, each unit of the radio communication unit 51 may be configured separately for each radio access mode. For example, the reception processing unit 511 and the transmission processing unit 512 may be configured separately by LTE and NR.

[0214] The reception processing unit 511 processes a downlink signal received via the antenna 513. The reception processing unit 511 includes a radio reception unit 511a, a demultiplexing unit 511b, a demodulation unit 511c, and a decoding unit 511d.

[0215] The radio receiving unit 511a performs down-conversion, removes unnecessary frequency components, controls amplification levels, orthogonal demodulation, converts to digital signals, removes guard intervals, extracts frequency domain signals by fast Fourier transform, etc. on the downlink signal. The demultiplexing unit 511b separates the downlink channel, the downlink synchronization signal, and the downlink reference signal from the signal output from the radio receiving unit 511a. The downlink channel is, for example, a channel such as PBCH, PDSCH, or PDCCH. The demodulation unit 211c demodulates the received signal using a modulation system such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM for the modulation symbol of the downlink channel. The decoding unit 511d performs decoding processing on the coded bits of the demodulated downlink channel. The decoded downlink data and downlink control information are output to the control unit 55.

[0216] The transmission processing unit 512 performs transmission processing of uplink control information and uplink data. The transmission processing unit 512 includes a coding unit 512a, a modulation unit 512b, a multiplexing unit 512c, and a radio transmission unit 512d.

[0217] The coding unit 512a encodes the uplink control information and uplink data input from the control unit 55 by using a coding method such as block coding, convolution coding or turbo coding. The modulation unit 512b modulates the coded bits output from the coding unit 512a by a predetermined modulation system such as BPSK, QPSK, 16QAM, 64QAM, 256QAM, etc. The multiplexing unit 512c multiplexes the modulation symbols and uplink reference signals of each channel and arranges them in a predetermined resource element. The radio transmission unit 512d performs various signal processing on the signal from the multiplexing unit 512c. For example, the radio transmission unit 512d performs processing such as conversion to the time domain by inverse fast Fourier transform, increase of guard interval, generation of baseband digital signal, conversion to analog signal, orthogonal modulation, up-conversion, removal of additional frequency components and power amplification. The signal generated by the transmission processing unit 512 is transmitted from the antenna 513.

[0218] The storage unit 52 is a storage device that can read and write data, such as a DRAM, an SRAM, a flash memory, and a hard disk. The storage unit 52 is used as a storage device of the mobile device 50.

[0219] The network communication unit 53 is a communication interface for communicating with other devices. For example, the network communication unit 53 is a LAN interface such as a NIC. The network communication unit 53 has a function of connecting it directly or indirectly to the network N1. The network communication unit 53 can be a wired interface or a wireless interface. The network communication unit 53 is used as a network communication device of the mobile device 50. The network communication unit 53 communicates with other devices under the control of the control unit 55.

[0220] The input / output unit 54 is a user interface for exchanging information with a user. For example, the input / output unit 54 is an operating device for the user to perform various operations, such as a keyboard, a mouse, an operating key, and a touch panel. Alternatively, the input / output unit 54 is a display device, such as a liquid crystal display or an organic EL display. The input / output unit 54 can be an audio device, such as a speaker or a buzzer. In addition, the input / output unit 54 can be a lighting device, such as an LED lamp. The input / output unit 54 is used as an input / output device (input device, output device, operating device, or notification device) of the mobile device 50.

[0221] The control unit 55 is a controller that controls each unit of the mobile device 50. The control unit 55 is implemented by a processor such as a CPU or an MPU, for example. For example, the control unit 55 is implemented by the processor executing various programs stored in a storage device within the mobile device 50 using a RAM or the like as a work area. The control unit 55 can be implemented by an integrated circuit such as an ASIC or an FPGA. CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0222] like Fig.16 As shown in , the control unit 55 includes an acquisition unit 551, a discrimination unit 552, a notification unit 553 and a communication control unit 554. Each block (acquisition unit 551 to communication control unit 554) constituting the control unit 55 is a functional block indicating the function of the control unit 55. These functional blocks can be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks can be a software module implemented by software (including microprograms), or can be a circuit block on a semiconductor chip (die). Of course, each functional block can be a processor or an integrated circuit. The method of configuring the functional blocks is arbitrary. The control unit 55 can be configured as a functional unit different from the above-mentioned functional blocks. The operation of each block constituting the control unit 55 will be described in detail later.

[0223] The mobile device 50 may have a mobile function. For example, the mobile device 50 may have a power unit such as an engine and may move by its own power. The mobile device 50 does not necessarily have to have a mobile function. In this case, the mobile device 50 may be a device modified into a device having a mobile function (for example, a vehicle such as a car). For example, the mobile device 50 may be a navigation system device modified into a car.

[0224] <<3. Operation of Information Processing System>>

[0225] Next, the operation of the information processing system 1 will be described.

[0226] <3-1. Determination process of enabling / disabling HARQ feedback>

[0227] As mentioned above, the information processing device of this embodiment determines whether to enable HARQ feedback in the side link communication based on the information about the side link communication. Here, the information about the side link communication can be, for example, information indicating the degree of congestion of the communication, such as the channel busy rate (CBR). In the following description, the information about the side link communication is referred to as the side link information. The side link information is not limited to the information indicating the degree of congestion of the communication. The side link information will be described in detail later in <3-3. Information for determination>.

[0228] Fig.17 is a flowchart illustrating a discrimination process according to an embodiment of the present disclosure. Fig.17 The determination process shown in is a process for determining whether to enable HARQ feedback in side link communication.

[0229] The information processing device as the execution entity of the discrimination process is usually a communication device of the data transmitter of the side link communication (hereinafter referred to as the transmitting device). However, the execution entity of the discrimination process does not necessarily have to be a transmitting device. For example, the information processing device as the execution entity of the discrimination process may be a communication device of the data receiver of the side link communication (hereinafter referred to as the receiving device). Here, the communication device (transmitting device and receiving device) may be a terminal device 40 or a mobile device 50. Of course, the communication device (transmitting device and receiving device) may be a base station device 30.

[0230] In addition, the information processing device as the execution entity of the determination process may be a base station device capable of radio communication with a plurality of communication devices (transmitting devices and / or receiving devices) performing side link communication.

[0231] In addition, the information processing device as the execution entity of the discrimination process may be a master communication device (also referred to as a master UE). The master communication device may be a communication device that controls the side link communication performed between other communication devices via the side link communication. Here, the master communication device may be a terminal device 40 or a mobile device 50. Of course, the master communication device may be a base station device 30. The master communication device may be renamed as a device other than a transmitting device that schedules resources for the side link communication of the transmitting device. At this time, the master communication device may be a UE-type RSU (e.g., a base station device 30).

[0232] In the following explanation, a communication device (transmitting device and receiving device) whose side link communication is controlled by a master communication device may be referred to as a slave communication device (or slave UE). The slave communication device may be a terminal device 40, a mobile device 50, or a base station device 30.

[0233] In addition, the information processing device as the execution entity of the discrimination process may be the management device 10. The execution entity of the discrimination process will be described in detail later in <3-2. Execution entity of the discrimination process>. In the description of the discrimination process shown below, although it is assumed that the execution entity of the discrimination process is the mobile device 50, the execution entity of the discrimination process may be replaced by another device (e.g., the management device 10, the base station device 20, the base station device 30, and the terminal device 40). For example, the description of "mobile device 50" appearing in the following description may be replaced by "management device 10", "base station device 20", "base station device 30", "terminal device 40", etc.

[0234] In this case, the description of the “acquisition unit 551” is appropriately replaced with “acquisition unit 241”, “acquisition unit 341”, “acquisition unit 451”, etc. In addition, the description of the “determination unit 552” is appropriately replaced with “determination unit 242”, “determination unit 342”, “determination unit 452”, etc. In addition, the description of the “notification unit 553” is appropriately replaced with “notification unit 243”, “notification unit 343”, “notification unit 453”, etc. In addition, the description of the “communication control unit 554” is appropriately replaced with “communication control unit 244”, “communication control unit 344”, “communication control unit 454”, etc. In addition, the description of the “radio communication unit 41” is appropriately replaced with “radio communication unit 21”, “radio communication unit 31”, “radio communication unit 41”, etc. The description of the “storage unit 42” is appropriately replaced with “storage unit 22”, “storage unit 32”, “storage unit 42”, etc.

[0235] In the following, reference will be made to Fig.17 Describe the discrimination process.

[0236] First, the acquisition unit 551 of the mobile device 50 acquires the side link information (step S1). The acquisition unit 551 can receive the side link information from other devices. When the side link information is already stored in the storage unit 52, the acquisition unit 551 can acquire the side link information from the storage unit 52. As described above, the side link information is information about the side link communication. Of course, the side link information is not limited to information indicating the degree of congestion of the communication. The side link information will be described in detail later in <3-3. Information for discrimination>.

[0237] Next, the determination unit 552 of the mobile device 50 determines whether to enable or disable HARQ feedback (step S2). At this time, the determination unit 552 determines whether to enable or disable HARQ feedback based on the side link information acquired in step S1. The process of step S2 will be described in detail later in <3-3. Information for determination>.

[0238] When HARQ feedback is enabled (step S2: Yes), the communication control unit 554 of the mobile device 50 sets HARQ feedback to enable (step S3). Then, the notification unit 553 of the mobile device 50 notifies the other device (e.g., the receiving device) of the determination result (step S4). When the mobile device 50 (the execution entity of the determination process) is the receiving device, the notification unit 553 does not necessarily have to notify the other device (e.g., the transmitting device) of the determination result. The notification of the determination result is described in detail later in <3-4. Notification of determination result>.

[0239] Then, the communication control unit 554 of the mobile device 50 controls the radio communication unit 51 to perform side link communication using HARQ feedback (step S5). For example, when the mobile device 50 (an execution entity of the determination process) is a transmitting device, while transmitting data to a receiving device, when NACK (negative acknowledgement) is replied as HARQ feedback from the receiving device, it retransmits the data.

[0240] When the mobile device 50 (an entity that performs the determination process) is a receiving device, when data is received via the side link communication, the communication control unit 554 performs HARQ feedback. For example, the communication control unit 554 replies ACK (positive response) as HARQ feedback when there is no error in the received data, and replies NACK (negative response) as HARQ feedback when there is an error in the received data.

[0241] When the mobile device 50 (the execution entity of the determination process) is a base station device or a master communication device, it can perform control of the side link communication, allocation of retransmission resources, etc. The execution of the side link communication will be described in detail later in <3-5. Execution of side link communication after determination>. The data retransmission process when HARQ feedback is enabled will be described in detail later in <3-6. HARQ feedback mode>.

[0242] On the other hand, when HARQ feedback is disabled (step S2: No), the communication control unit 554 of the mobile device 50 sets HARQ feedback to be disabled (step S6). Then, the notification unit 553 of the mobile device 50 notifies the other device (e.g., receiving device) of the determination result (step S7). When the mobile device 50 (the execution entity of the determination process) is the receiving device, the notification unit 553 does not necessarily have to notify the other device (e.g., transmitting device) of the determination result. The notification of the determination result is described in detail later in <3-4. Notification of determination result>.

[0243] Then, the communication control unit 554 of the mobile device 50 controls the radio communication unit 51 to perform side link communication without HARQ feedback (step S8). For example, when the mobile device 50 (the execution entity of the determination process) is a transmitting device, data is repeatedly transmitted (retransmitted) to the receiving device. Of course, side link communication without HARQ feedback is not limited to repeated transmission.

[0244] When the mobile device 50 (the execution entity of the determination process) is a receiving device, when data is received via the side link communication, the communication control unit 554 does not perform HARQ feedback. At this time, when there is an error in the received data, the communication control unit 554 can correct the error based on the repeatedly transmitted data. The execution of the side link communication will be described in detail later in <3-5. Execution of side link communication after determination>.

[0245] When the side link communication is completed, the mobile device 50 ends the determination process.

[0246] <3-2. Execution entity of the determination process>

[0247] Next, an execution entity of the determination process (determination entity for enabling / disabling HARQ feedback) will be described. The execution entity of the determination process is divided into the following (a) to (d).

[0248] (a) Sending equipment

[0249] (b) Receiving equipment

[0250] (c) Base station equipment

[0251] (d) Main communication equipment

[0252] Hereinafter, each of (a) to (d) will be described.

[0253] (a) Sending equipment

[0254] When the transmitting device determines whether to enable or disable HARQ feedback, the transmitting device can semi-statically or dynamically notify the receiving device of the determination result. Semi-static notification is, for example, a notification that HARQ feedback is enabled / disabled for multiple side link communications for a predetermined period of time or a predetermined number of times. In addition, dynamic notification is a notification that HARQ feedback is enabled / disabled for each side link communication. In the case of semi-static notification, the transmitting device can instruct the receiving device to enable / disable HARQ feedback using a channel such as a physical side link control channel (PSCCH), a physical side link feedback channel (PSFCH), or a physical side link shared channel (PSSCH). In the case of semi-static notification, the transmitting device can instruct the receiving device to enable / disable HARQ feedback for each side link communication using side link communication.

[0255] (b) Receiving equipment

[0256] When the receiving device determines whether to enable or disable HARQ feedback, the receiving device may notify the transmitting device of the determination result. For example, the receiving device uses a channel such as PSCCH, PSFCH, or PSSCH to make a notification of "information indicating whether to send HARQ feedback when data is received via side link communication next time." Alternatively, the receiving device may include "information on whether to send HARQ feedback when data is received via side link communication next time" in the transmission packet of the side link communication.

[0257] (c) Base station equipment

[0258] When the base station device determines whether to enable or disable HARQ feedback, the base station device can semi-statically or dynamically notify the receiving device and / or the transmitting device of the determination result. For example, the notification of the determination result can be performed using radio communication between the base station and the terminal such as RRC, system information block (SIB), PDCCH and PBCH.

[0259] (d) Main communication equipment

[0260] When the primary communication device determines whether to enable or disable HARQ feedback, the primary communication device may semi-statically or dynamically notify the receiving device and / or the transmitting device of the determination result. The notification of the determination result may be performed using side link communication.

[0261] <3-3. Information used for determination>

[0262] Next, information (sidelink information) used for determining whether to enable / disable HARQ feedback and the determination of whether to enable / disable HARQ feedback will be described. The following (A) to (J) can be assumed as the sidelink information.

[0263] (A) Location information and / or distance information

[0264] (B) Reliability Requirement and / or Latency Requirement Information

[0265] (C) Information about other receiving devices that enable feedback

[0266] (D) Congestion level information

[0267] (E) Traffic information

[0268] (F) Communication method information

[0269] (G) Retransmission resource discriminator information

[0270] (H) Resource pool information

[0271] (I) Number of receiving devices

[0272] (J) Business type information

[0273] In the following, each of (A) to (J) will be described. The description of "information processing device" appearing in the following description may be replaced by "management device 10", "base station device 20", "base station device 30", "terminal device 40" or "mobile device 50".

[0274] (A) Location information and / or distance information

[0275] Assume that position information and / or distance information are used as side link information. Here, position information is information indicating the position of a communication device that performs side link communication. Position information may be a position in a cell formed by a base station device (e.g., information about a direction and distance relative to a base station device), or may be information about latitude and longitude. In addition, distance information is information indicating the distance between communication devices that perform side link communication. For example, distance information is the distance between a transmitting device and a receiving device.

[0276] For example, it is assumed that the side link information is distance information. In this case, when the distance between the communication devices performing the side link communication is less than the predetermined distance, the information processing device can determine to start HARQ feedback. On the other hand, when the distance between the communication devices performing the side link communication is greater than the predetermined distance, the information processing device can determine to disable HARQ feedback. In this case, the transmitting device can perform side link communication using a communication method other than the communication method using HARQ (such as repetition). When there is a distance between the transmitting device and the receiving device, the communication is prone to fail, but in this case, HARQ feedback is not performed, thereby maintaining high communication performance (e.g., low communication delay).

[0277] In addition, it is assumed that the side link information is location information indicating the location of the receiving device. In addition, it is assumed that the receiving device is configured to be able to provide HARQ feedback to the transmitting device via the base station device. In this case, the information processing device can determine whether the receiving device is located within the coverage range of the base station device (for example, within the range of the cell formed by the base station device) based on the location information. When the receiving device is within the coverage range of the base station device, the information processing device can determine that the base station device via the receiving device enables HARQ feedback. At this time, the information processing device can determine that the receiving device disables the direct HARQ feedback from the receiving device to the transmitting device using the side link communication. On the other hand, when the receiving device is outside the coverage range of the base station device, it can determine that the HARQ feedback of the base station device via the receiving device is disabled. At this time, the information processing device can determine that the receiving device enables the direct HARQ feedback from the receiving device to the transmitting device using the side link communication. When the receiving device is not within the coverage range of the base station device, the HARQ feedback via the base station device is not performed, so that radio resources are not wasted.

[0278] (B) Reliability Requirement and / or Latency Requirement Information

[0279] Assume reliability requirement and / or delay requirement information as another example of side link information. Here, the reliability requirement information is information about the reliability requirement of the transmission data of the side link communication. In addition, the reliability requirement information is information about the delay requirement of the transmission data of the side link communication. The reliability requirement and / or delay requirement information can be information about the QoS requirement of the transmitted packet.

[0280] For example, it is assumed that the side link information is information of delay requirement. In this case, when the delay requirement requires a low delay equal to or greater than a predetermined reference (when the delay requirement is strict), the information processing device can disable HARQ feedback because processing HARQ and retransmission may take too long and may not meet the requirement. On the other hand, when the delay requirement does not require a low delay equal to or greater than a predetermined reference (when the delay requirement is loose), the information processing device can enable HARQ feedback.

[0281] In addition, it is assumed that the side link information is information that requires reliability. In this case, when the reliability requirement requires a reliability equal to or higher than a predetermined reference (when the reliability requirement is strict), the information processing device can enable HARQ feedback. On the other hand, when the reliability requirement does not require a reliability equal to or higher than a predetermined reference (when the reliability requirement is loose), the information processing device can disable HARQ feedback.

[0282] (C) Information about other receiving devices that enable feedback

[0283] Assume that the information of other receiving devices for which HARQ feedback is enabled is another example of side link information. For example, it is assumed that the transmitting device performs side link communication with multiple receiving devices (e.g., the first communication device and the second communication device). In addition, it is assumed that the other receiving devices for which feedback is enabled are located near a certain receiving device (the first communication device). At this time, when the positions of multiple receiving devices are close to each other, it is considered that the receiving state (reception success or failure) has hardly changed. In this case, the transmitting device does not need to let all receiving devices send HARQ feedback.

[0284] Therefore, the information processing device obtains information indicating whether other receiving devices that enable HARQ feedback are located within a predetermined range of the first communication device as a side link communication receiving device as side link information. The information processing device determines whether to enable feedback of the first communication device based on the information about whether other receiving devices that enable HARQ feedback are located within a predetermined range.

[0285] For example, when other receiving devices with HARQ feedback enabled are not within a predetermined range, the information processing device can determine to enable HARQ feedback for the first communication device. On the other hand, when other receiving devices with HARQ feedback enabled are within a predetermined range, it can be determined to disable HARQ feedback for the first communication device.

[0286] At this time, the information processing device can determine whether to perform data retransmission to the first communication device based on the HARQ feedback of other receiving devices. For example, it is assumed that the transmitting device performs side link transmission to another communication device other than the first communication device. At this time, when the HARQ feedback of other receiving devices is ACK, it is likely that the data has been transmitted to the first communication device without any problems. Therefore, when the HARQ feedback of other receiving devices is ACK, the information processing device does not retransmit data to the first communication device so as not to waste radio resources. On the other hand, when the HARQ feedback of other receiving devices is NACK, it is likely that the data transmission to the first communication device fails. Therefore, when the HARQ feedback of other receiving devices is NACK, the information processing device retransmits data to the first communication device in order to improve the reliability of communication.

[0287] Alternatively, the information processing device can discriminate the data transmission mode for data transmission to the first communication device from a plurality of data transmission modes based on the HARQ feedback of other receiving devices. For example, it is assumed that the transmitting device performs a side link transmission with another communication device before the side link communication with the first communication device. At this time, when the HARQ feedback of the other receiving devices is ACK, it is very likely that the data will be transmitted to the first communication device without any problems. Therefore, the information processing device performs non-repetitive transmission so as not to waste radio resources. On the other hand, when the HARQ feedback of the other receiving devices is NACK, it is very likely that the data transmission to the first communication device fails. Therefore, when the HARQ feedback of the other receiving devices is NACK, the information processing device performs retransmission in order to improve the reliability of communication.

[0288] (D) Congestion level information

[0289] Assume congestion level information as another example of side link information. Congestion level information is information indicating the congestion level of radio resources used for side link communication. For example, the congestion level information is a channel busy rate (CBR). When the channel is busy, it is difficult to ensure resources for HARQ feedback. Even when the receiving device performs HARQ feedback, it is possible that the HARQ feedback cannot be read due to a conflict with another side link communication. Therefore, in order not to waste radio resources, HARQ feedback is disabled when the channel used for side link communication is congested.

[0290] For example, the information processing device obtains information indicating the degree of congestion of radio resources used for side link communication as side link information. Then, the information processing device determines whether to enable HARQ feedback based on the information indicating the degree of congestion. For example, when the degree of congestion is less than a predetermined threshold, the information processing device enables HARQ feedback. On the other hand, when the degree of congestion is equal to or higher than the predetermined threshold, the information processing device disables HARQ feedback.

[0291] (E) Traffic information

[0292] Assume flow information as another example of sidelink information. Flow information is information about the flow of sidelink communication. Flow is, for example, the amount of data transmitted on a channel within a certain period of time. Alternatively, flow is related to the transmission timing of the terminal. For example, when the transmission / reception of sidelink data is significantly affected, the information processing device disables HARQ feedback.

[0293] For example, the information processing device obtains information about the traffic of the side link communication as the side link information. For example, the information processing device obtains the communication result (e.g., data volume) of the HARQ feedback between the transmitting device and the receiving device within a certain time period. Then, the information processing device determines whether to enable feedback based on the information about the traffic. For example, even if the side link communication has not been completed, when the data volume of the communication per predetermined period (e.g., 1 second) of the HARQ feedback changes by more than a predetermined threshold, the communication environment has also changed significantly, so that the information processing device enables or disables the HARQ feedback. For example, when the data volume per predetermined period exceeds a predetermined threshold, the HARQ feedback is enabled. On the other hand, when the data volume per predetermined period is less than a predetermined threshold, the HARQ feedback is disabled. For example, the sending / receiving timing depends on the traffic. When the HARQ sending / receiving timing overlaps with the data sending / receiving timing, only one of the HARQ and the data can be sent / received. That is, when there are many sending / receiving timings, the HARQ feedback is disabled. On the contrary, when the timing of transmission and reception is small, the HARQ feedback is enabled.

[0294] (F) Communication method information

[0295] As another example of the side link information, communication mode information is assumed. Here, the communication mode information is information for identifying the communication mode of the side link communication. For example, the communication mode information is information for identifying which of a plurality of communication modes including at least one of broadcast, multicast, and unicast the communication mode used for the side link communication is.

[0296] In this case, the information processing device may obtain information for identifying which of a plurality of communication modes including at least one of broadcast, multicast, and unicast is used for the side link communication as the side link information. The information processing device may then determine whether to enable HARQ feedback based on the information for specifying the communication mode for the side link communication.

[0297] For example, the information processing device may obtain information for identifying which of a plurality of communication modes including at least broadcasting is used for the side link communication as the side link information. Then, when the communication mode for the side link communication is broadcasting, the information processing device may determine to disable HARQ feedback. When the communication mode is broadcasting, because the transmitting device processes many receiving devices, it may be difficult for the transmitting device to respond to the HARQ feedback of each receiving device. In addition, when data is retransmitted to the receiving devices separately, a large amount of radio resources is consumed. Therefore, by disabling HARQ feedback in advance, it is possible to prevent resources such as CPU resources and radio resources from being wasted due to HARQ.

[0298] When the communication mode is multicast or unicast, HARQ feedback can be enabled because the number of communication partners is limited.

[0299] For example, the information processing device may obtain information for identifying which of the multiple communication modes including at least multicast is used for the side link communication as the side link information. Then, when the communication mode used for the side link communication is multicast, the information processing device may determine to start HARQ feedback.

[0300] Alternatively, the information processing device may obtain information for identifying which of the multiple communication modes including at least unicast is used for the side link communication as the side link information. Then, when the communication mode used for the side link communication is unicast, the information processing device may determine to start HARQ feedback.

[0301] (G) Retransmission resource discriminator information

[0302] As another example of the side link information, information for identifying which device is the device that decides the radio resources for data retransmission (device to be allocated) is assumed.

[0303] For example, the information processing device may obtain information for identifying which device determines the radio resources for data retransmission as side link information. Then, the information processing device may determine whether to enable feedback based on the information for identifying the device that determines the radio resources for data retransmission.

[0304] At this time, when the device that determines the radio resources for data retransmission is a base station device, the information processing device can determine to disable direct feedback from the receiving device to the transmitting device for side link communication and enable HARQ feedback from the receiving device to the base station device.

[0305] Alternatively, when the device that determines the radio resources for data retransmission is the master communication device, the information processing device determines to disable direct HARQ feedback from the receiving device (one of the slave communication devices) to the transmitting device (another of the slave communication devices) for side link communication, and determines to enable feedback from the receiving device (one of the slave communication devices) to the master communication device.

[0306] The apparatus for deciding radio resources for data retransmission will be described in detail later in <3-6. HARQ feedback mode>.

[0307] (H) Resource pool information

[0308] Assume resource pool information as another example of the side link information. The resource pool information is information on a resource pool of radio resources used for side link communication.

[0309] For example, the information processing device may obtain information about a resource pool of radio resources used for sidelink communication as sidelink information. The information processing device may determine whether to enable feedback based on determining whether feedback is enabled and based on information about the resource pool. For example, the information processing device disables HARQ feedback for sidelink communication using resources of a pool that does not provide HARQ feedback and / or a pool that does not support HARQ feedback. For example, the information processing device disables HARQ feedback for sidelink communication using a resource pool dedicated to sidelink broadcasting.

[0310] (I) Number of receiving devices

[0311] As another example of sidelink information, information indicating the number of receiving devices is assumed. For example, in multicast, it is assumed that the number of receiving devices will increase. When the number of receiving devices is large, it is assumed that it will be difficult to process HARQ feedback as in the case of broadcast. Therefore, the information processing device enables or disables HARQ feedback according to the number of receiving devices.

[0312] For example, the information processing device may obtain information indicating the number of receiving devices used for side link communication as side link information. Then, the information processing device may determine whether to enable HARQ feedback based on the information indicating the number of receiving devices. At this time, when the number of receiving devices is greater than a predetermined number, the information processing device may determine to disable HARQ feedback. On the other hand, when the number of receiving devices is less than a predetermined number, the information processing device may determine to enable HARQ feedback.

[0313] (J) Business type information

[0314] Assume that service type information is another example of side link information. Service type information is information indicating the type of communication service performed by using side link communication. For example, service type information is information for identifying which type of communication service performed by using side link communication is one of multiple types including at least one of eMBB, mMTC, and URLLC.

[0315] For example, the information processing device may obtain information indicating the type of communication service performed using the side link communication as the side link information. The information processing device may then determine whether to enable feedback based on the information indicating the type of communication service. In URLLC, the delay requirement is very strict. Therefore, when the type of communication service performed using the side link communication is URLLC, the information processing device may determine to disable HARQ feedback.

[0316] In 5G, the concept of network slicing (hereinafter referred to as network slicing) is introduced to provide communication services optimized for various communication characteristics according to use cases. Therefore, the type of communication service can be determined based on network slice identification information (e.g., slice ID). The slice ID can be, for example, single network slice selection auxiliary information (S-NSSAI).

[0317] <3-4. Notification of determination results>

[0318] Next, notification of the determination result will be described. The notification aspect of the determination result differs depending on which device the execution entity of the determination process (determination entity that enables / disables HARQ feedback) is. As described above, the execution entity of the determination process is divided into the following (a) to (d).

[0319] (a) Sending equipment

[0320] (b) Receiving equipment

[0321] (c) Base station equipment

[0322] (d) Main communication equipment

[0323] Hereinafter, a notification process of a discrimination result for each execution entity of the discrimination process will be described.

[0324] (a) Sending equipment

[0325] Fig.18 1 is a diagram illustrating a notification process of a determination result when a transmitting device determines whether to enable or disable HARQ feedback. In this case, the transmitting device notifies the receiving device of the determination result using side link communication. The means for notification is, for example, PSCCH, PSSCH, or PFSCH.

[0326] (b) Receiving equipment

[0327] Fig.19 1 is a diagram illustrating a notification process of a determination result when a receiving device determines whether to enable or disable HARQ feedback. In this case, the receiving device notifies the transmitting device of the determination result using side link communication. The means for notification is, for example, PSCCH, PSSCH, or PFSCH.

[0328] (c) Base station equipment

[0329] Fig. 20 and 21 is a diagram illustrating a notification process of a determination result when a base station apparatus determines whether to enable or disable HARQ feedback.

[0330] exist Fig. 20 In the example of , the base station device first notifies the sending device of the determination result. The means for notification is, for example, RRC, SIB, PBCH, PDCCH or PDSCH. Afterwards, the sending device notifies the receiving device of the enable / disable of HARQ feedback. The means for notification is, for example, PSCCH, PSSCH or PFSCH.

[0331] exist Fig.21 In the example of , the base station device notifies both the transmitting device and the receiving device of the determination result. The means for notification is, for example, RRC, SIB, PBCH, PDCCH, or PDSCH.

[0332] (d) Main communication equipment

[0333] Fig. 22 and 23 : is a diagram illustrating a notification process of a determination result when the master communication device determines whether to enable or disable HARQ feedback.

[0334] exist Fig. 22 In the example of , the master communication device first notifies the sending device of the determination result. The means for notification is, for example, PSCCH, PSSCH or PFSCH. Afterwards, the sending device notifies the receiving device of the enable / disable of HARQ feedback. The means for notification is, for example, PSCCH, PSSCH or PFSCH.

[0335] exist Fig.23 In the example of , the master communication device notifies both the transmitting device and the receiving device of the determination result. The means for notification is, for example, PSCCH, PSSCH or PFSCH.

[0336] <3-5. Execution of side link communication after determination>

[0337] Next, the side link communication is performed after the enable / disable of the HARQ feedback is discriminated. In the following description, the transmission operation of the transmission device when the communication method is unicast, multicast, and broadcast will be described.

[0338] (1) In the case of unicast

[0339] When HARQ feedback is enabled, the transmitting device may perform sidelink transmission in which there are repetitions, but it is desirable to perform sidelink communication in which there are no repetitions. Efficient use of radio resources is achieved by not performing repetitions.

[0340] On the other hand, when HARQ feedback is disabled, the transmitting device can perform sidelink communication without duplication, but it is desirable to perform sidelink transmission with duplication. By performing sidelink transmission with duplication, communication reliability can be maintained even without HARQ feedback.

[0341] (2) In the case of multicast

[0342] When HARQ feedback of all receiving devices as transmission targets is enabled, the transmitting device can perform sidelink transmission with repetition, but it is desirable to perform sidelink communication without repetition. Effective utilization of radio resources is achieved by not performing repetition.

[0343] Moreover, when the HARQ feedback of all receiving devices as the transmission target is disabled, the transmitting device can perform side link communication without duplication, but it is expected to perform side link transmission with duplication. By performing side link transmission with duplication, communication reliability can be maintained even without HARQ feedback.

[0344] Furthermore, when HARQ feedback of some of the reception devices as transmission targets is disabled, the following two modes may be assumed.

[0345] (Mode 1)

[0346] The transmitting device may perform sidelink communication without repetition, but it is desirable to perform repetition. By performing sidelink transmission with repetition, communication reliability can be maintained even without HARQ feedback.

[0347] (Mode 2)

[0348] The transmitting device classifies the receiving devices as transmission targets into a group of receiving devices (first group) that perform HARQ feedback and a group of receiving devices (second group) that do not perform HARQ feedback. The transmitting device performs side link communication in which there is no duplication on the receiving devices of the first group, and performs side link communication in which there is duplication on the receiving devices of the second group. While maintaining communication reliability, radio resources are not wasted.

[0349] (3) In the case of broadcasting

[0350] Although it is desirable to disable HARQ feedback, the transmitting device may perform the same transmission process as in the multicast case.

[0351] <3-6.HARQ Feedback Mode>

[0352] It can be assumed that HARQ includes multiple modes with different aspects from HARQ feedback to data retransmission. Hereinafter, the multiple modes are referred to as HARQ feedback modes. As mentioned below, the HARQ feedback modes are classified according to the difference in (X) HARQ feedback routes and (Y) the difference in the device that determines the radio resources for data retransmission (the device to be allocated).

[0353] (X)HARQ feedback route

[0354] It is assumed that the following three routes are HARQ feedback routes.

[0355] X1. Route for sending HARQ feedback from a receiving device to a transmitting device using sidelink communication.

[0356] X2. A route for sending HARQ feedback from a receiving device to a base station device using uplink communication.

[0357] X3. Route for sending HARQ feedback from the receiving device to the master device using sidelink communication.

[0358] (Y) Device for determining radio resources for data retransmission

[0359] The following three devices are assumed to be devices that determine radio resources for data retransmission. The radio resources for data retransmission are resources specified by frequency and time, for example.

[0360] Y1.Sending device

[0361] Y2. Base station

[0362] Y3. Main communication equipment

[0363] According to the combination of the above (X) and (Y), the following nine HARQ feedback modes can be considered.

[0364] HARQ feedback mode 1 (X1+Y1)

[0365] HARQ feedback mode 2 (X1+Y2)

[0366] HARQ feedback mode 3 (X1+Y3)

[0367] HARQ feedback mode 4 (X2+Y1)

[0368] HARQ feedback mode 5 (X2+Y2)

[0369] HARQ feedback mode 6 (X3+Y1)

[0370] HARQ feedback mode 7 (X3+Y3)

[0371] HARQ feedback mode 8 (X2+Y2)

[0372] HARQ feedback mode 9 (X3+Y3)

[0373] Each of the nine modes described above will be described below.

[0374] [HARQ feedback mode 1 (X1+Y1)]

[0375] Fig.24 1 is a diagram illustrating a data retransmission process according to HARQ feedback mode 1. First, the receiving device sends HARQ feedback to the transmitting device (step S11). Then, when the HARQ feedback is NACK, the transmitting device retransmits the data to the receiving device (step S12). At this time, the transmitting device can decide the radio resources for data retransmission from the radio resources that have been saved.

[0376] [HARQ feedback mode 2 (X1+Y2)]

[0377] Fig.25 2 is a diagram illustrating a data retransmission process according to HARQ feedback mode 2. First, the receiving device sends HARQ feedback to the transmitting device (step S21). Then, when the HARQ feedback is NACK, the transmitting device requests radio resources for data retransmission from the base station device (step S22). Then, the base station device allocates the radio resources for data retransmission to the transmitting device (step S23). After the radio resources for data retransmission are allocated, the transmitting device retransmits the data using the allocated radio resources (step S24). Because the allocation of radio resources is under the control of the base station device, the radio resources are not wasted.

[0378] [HARQ feedback mode 3 (X1+Y3)]

[0379] Fig.263 is a diagram illustrating a data retransmission process according to HARQ feedback mode 3. First, a receiving device (slave communication device) sends HARQ feedback to a transmitting device (slave communication device) (step S31). Then, when the HARQ feedback is NACK, the transmitting device requests radio resources for data retransmission from a master communication device (step S32). Then, the master communication device allocates radio resources for data retransmission to the transmitting device (step S33). When radio resources for data retransmission are allocated, the transmitting device retransmits data using the allocated radio resources (step S34). Because the allocation of radio resources is under the control of the master communication device, there is no waste of radio resources.

[0380] [HARQ feedback mode 4 (X2+Y1)]

[0381] Fig. 27 4 is a diagram illustrating a data retransmission process according to HARQ feedback mode 4. First, a receiving device sends HARQ feedback to a base station device (step S41). Then, the base station device sends the HARQ feedback to a transmitting device (step S42). Then, when the HARQ feedback is NACK, the transmitting device retransmits the data to the receiving device (step S43). At this time, the transmitting device can decide the radio resources for data retransmission from the radio resources that have been saved. Since the HARQ feedback is transmitted via the base station device, it is possible to reduce the possibility that the HARQ feedback does not reach the transmitting device.

[0382] [HARQ feedback mode 5 (X2+Y2)]

[0383] Fig.28 is a diagram illustrating a data retransmission process according to HARQ feedback mode 5. First, the receiving device sends HARQ feedback to the base station device (step S51). When the HARQ feedback is NACK, the base station device instructs the sending device to retransmit the data and allocates radio resources for data retransmission (step S52). Then, the sending device retransmits the data using the allocated radio resources (step S53). Since the base station device determines the retransmission, the processing of the sending device can be simplified.

[0384] [HARQ feedback mode 6 (X3+Y1)]

[0385] Fig.29is a diagram illustrating a data retransmission process according to HARQ feedback mode 6. First, the receiving device sends the HARQ feedback to the primary communication device (step S61). Then, the primary communication device sends the HARQ feedback to the transmitting device (step S62). Then, when the HARQ feedback is NACK, the transmitting device retransmits the data to the receiving device (step S63). At this time, the transmitting device can decide the radio resources for data retransmission from the radio resources that have been saved. Since the HARQ feedback is sent via the primary communication device, it is possible to reduce the possibility that the HARQ feedback does not reach the transmitting device.

[0386] [HARQ feedback mode 7 (X3+Y3)]

[0387] Fig.30 is a diagram illustrating a data retransmission process according to HARQ feedback mode 7. First, the receiving device sends HARQ feedback to the primary communication device (step S71). When the HARQ feedback is NACK, the primary communication device instructs the transmitting device to retransmit the data and allocates radio resources for data retransmission (step S72). Then, the transmitting device retransmits the data using the allocated radio resources (step S73). Since the primary communication device determines the retransmission, the processing of the transmitting device can be simplified.

[0388] [HARQ feedback mode 8 (X2+Y2)]

[0389] Fig.31 is a diagram illustrating a data retransmission process according to HARQ feedback mode 8. First, a receiving device sends HARQ feedback to a base station device (step S81). Then, the base station device sends the HARQ feedback to a transmitting device (step S82). Then, when the HARQ feedback is NACK, the transmitting device requests radio resources for data retransmission from the base station device (step S83). Then, the base station device allocates the radio resources for data retransmission to the transmitting device (step S84). After allocating the radio resources for data retransmission, the transmitting device retransmits the data using the allocated radio resources (step S85). Since the HARQ feedback is transmitted via the base station device, it is possible to reduce the possibility that the HARQ feedback does not reach the transmitting device. Moreover, since the allocation of radio resources is under the control of the base station device, radio resources are not wasted.

[0390] [HARQ feedback mode 9 (X3+Y3)]

[0391] Fig.32is a diagram illustrating a data retransmission process according to HARQ feedback mode 9. First, a receiving device sends HARQ feedback to a primary communication device (step S91). Then, the primary communication device sends the HARQ feedback to a transmitting device (step S92). Then, when the HARQ feedback is NACK, the transmitting device requests radio resources for data retransmission from the primary communication device (step S93). Then, the primary communication device allocates radio resources for data retransmission to the transmitting device (step S94). When radio resources for data retransmission are allocated, the transmitting device retransmits data using the allocated radio resources (step S95). Since the HARQ feedback is sent via the primary communication device, the possibility of the HARQ feedback not reaching the transmitting device can be reduced. Moreover, since the allocation of radio resources is under the control of the primary communication device, radio resources are not wasted.

[0392] <<4. Modification>>

[0393] The above-described embodiments illustrate examples, and various modifications and applications are possible.

[0394] <4-1. Modifications to HARQ feedback>

[0395] For example, in the above embodiment, although the automatic retransmission request is described as a hybrid automatic retransmission request (HARQ), the automatic retransmission request is not limited to HARQ. The automatic retransmission request may be another automatic retransmission request (ARQ) other than HARQ.

[0396] Furthermore, the above-mentioned “side link information for distinguishing (A) to (J)”, “disabled / enabled distinguishing entity of HARQ feedback” (a) to (d)” and “HARQ feedback modes 1 to 9” may be appropriately combined. Fig.33 is a diagram illustrating an example of a combination of side link information and a discriminator.

[0397] For example, in the case of the enabling / disabling determination entity (a) of HARQ feedback, the side link information (A), and HARQ feedback mode 1, the transmitting device determines whether to enable or disable HARQ feedback based on the positional relationship between itself and the receiving device. Then, the transmitting device notifies the receiver of the determination result.

[0398] Furthermore, for example, in the case of the determination entity (b) for enabling / disabling of HARQ feedback, the side link information (D), and the HARQ feedback mode 5, the base station device determines whether to enable or disable HARQ feedback based on the congestion level of the channel. Then, when the base station device obtains NACK as HARQ feedback from the receiving device, the base station device allocates radio resources for data retransmission to the transmitting device. The transmitting device retransmits data through the side link communication using the allocated radio resources.

[0399] In addition, the target to which this embodiment is applied is not limited to V2X communication. This embodiment can be applied to use cases other than V2X communication using side link communication. For example, application examples of this embodiment include D2D communication and MTC communication. This embodiment can also be applied to mobile cells, relay communications, etc.

[0400] In addition, although this embodiment is described as a method of mode 3 resource allocation, it can also be applied to mode 4.

[0401] In addition, although the present embodiment is described as an FDM type resource pool approach, it can also be applied to a TDM type resource pool.

[0402] The present embodiment can be applied to multi-carrier communication in which side link communication is performed using a plurality of carriers.

[0403] <4-2. Other modifications>

[0404] The control device that controls the management device 10, the base station device 20, the base station device 30, the terminal device 40 or the mobile device 50 of this embodiment may be implemented by a dedicated computer system or a general-purpose computer system.

[0405] For example, a program for performing the above operations is stored and distributed in a computer-readable recording medium such as an optical disk, a semiconductor memory, a magnetic tape, or a floppy disk. Then, for example, the control device is configured by installing the program on a computer and performing the above-mentioned processing. At this time, the control device can be an external device (e.g., a personal computer) of the management device 10, the base station device 20, the base station device 30, the terminal device 40, or the mobile device 50. In addition, the control device is a device (e.g., a control unit 13, a control unit 24, a control unit 34, a control unit 45, or a control unit 55) within the management device 10, the base station device 20, the base station device 30, the terminal device 40, or the mobile device 50.

[0406] In addition, the communication program may be stored in a disk device provided in a server device on a network such as the Internet so that it can be downloaded to a computer, etc. In addition, the above-mentioned functions may be implemented by an operating system (OS) in combination with application software. In this case, the parts other than the OS may be stored in a medium and distributed, or the parts other than the OS may be stored in a server device so that it can be downloaded to a computer, etc.

[0407] In addition, in the above embodiments, it is also possible to manually execute all or part of the process described as being automatically executed in the corresponding process, and alternatively, it is also possible to automatically execute all or part of the process described as being manually executed in the corresponding process. In addition, unless otherwise specified, the processing procedures, specific names, and information including various data and parameters shown in the above documents and drawings can be arbitrarily changed. For example, the various information shown in each figure is not limited to the information shown.

[0408] In addition, each component of each device shown is a functional concept and does not necessarily have to be physically configured as shown in the figure. That is, the specific form of distribution / integration of each device is not limited to the form shown in the figure, and all or part of the device can be functionally or physically distributed / integrated in any unit according to various loads and usage conditions.

[0409] In addition, the above-described embodiments can be appropriately combined in areas where the processing contents do not contradict each other. In addition, the order of each step shown in the sequence diagram or flowchart of the present embodiment can be appropriately changed.

[0410] <<5. Conclusion>>

[0411] As explained above according to the embodiment of the present disclosure, the information processing device (e.g., the base station device 20 or the mobile device 50) acquires information about the side link communication (e.g., the side link information mentioned above). Then, the information processing device determines whether to enable HARQ feedback in the side link communication based on the information about the side link communication. Therefore, according to the communication aspect, the HARQ feedback of the communication device of the receiver is enabled or disabled, thereby achieving high communication performance in the side link communication.

[0412] The embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the above embodiments, and various changes can be made without departing from the gist of the present disclosure. Moreover, components of different embodiments and modifications can be appropriately combined.

[0413] In addition, the effects in each embodiment described in this specification are merely examples and are not limited, and there may be other effects.

[0414] Note that the present technology may also be configured as follows.

[0415] (1) An information processing device comprising:

[0416] an acquisition unit that acquires information about the side link communication; and

[0417] A determination unit determines whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on information about the side link communication.

[0418] (2) The information processing device according to (1), wherein

[0419] Automatic retransmission requirements include multiple modes with different forms ranging from feedback to data retransmission, and

[0420] The determination unit determines a mode to be used for the automatic retransmission request from among the plurality of modes based on information on the side link communication.

[0421] (3) The information processing device according to (1), wherein

[0422] an acquisition unit acquires at least one of distance information indicating a distance between communication devices performing side link communication and position information indicating a position of the communication device performing side link communication as information on the side link communication, and

[0423] The determination unit determines whether feedback is enabled based on at least one of the distance information and the position information.

[0424] (4) The information processing device according to (3), wherein

[0425] an acquisition unit acquires distance information indicating a distance between communication devices performing side link communication as information on the side link communication, and

[0426] The determination unit determines that feedback is disabled when the distance between the communication devices performing the side link communication is greater than a predetermined distance.

[0427] (5) The information processing device according to (3), wherein

[0428] The receiving device of the side link communication is configured to provide feedback to the transmitting device via the base station device,

[0429] an acquisition unit acquires position information indicating a position of a receiving device as information on side link communication, and

[0430] When the receiving device is located outside the coverage of the base station device, the determination unit determines that feedback of the receiving device via the base station device is disabled.

[0431] (6) The information processing device according to (1), wherein

[0432] an acquisition unit acquires information on a reliability requirement or a delay requirement for transmission data of the side link communication as information on the side link communication, and

[0433] The determination unit determines whether to enable feedback based on information about the reliability requirement or the delay requirement.

[0434] (7) The information processing device according to (1), wherein

[0435] the acquiring unit acquires, as the information on the side link communication, information indicating whether the other receiving device for which feedback is enabled is located within a predetermined range of the first communication device as the receiving device for the side link communication; and

[0436] The determination unit determines whether to enable feedback of the first communication device based on information on whether other receiving devices whose feedback is enabled are located within a predetermined range.

[0437] (8) The information processing device according to (7), wherein

[0438] When other receiving devices whose feedback is enabled are located within a predetermined range, the determination unit determines to disable feedback of the first communication device, and determines whether to perform data retransmission to the first communication device based on the feedback of the other receiving devices.

[0439] (9) The information processing device according to (7), wherein

[0440] When other receiving devices with feedback enabled are within a predetermined range, the determination unit determines to disable feedback of the first communication device, and determines a data transmission method for transmitting data to the first communication device from a plurality of data transmission methods based on the feedback of other receiving devices.

[0441] (10) The information processing device according to (1), wherein

[0442] an acquisition unit acquires information indicating a congestion degree of radio resources used for side link communication as information on the side link communication, and

[0443] The determination unit determines whether to enable feedback based on information indicating the degree of congestion.

[0444] (11) The information processing device according to (1), wherein

[0445] the acquiring unit acquires information on the flow rate of the side link communication as the information on the side link communication, and

[0446] The determination unit determines whether to enable feedback based on information about the flow rate.

[0447] (12) The information processing device according to (1), wherein

[0448] an acquisition unit acquires information for identifying which communication method used in the side link communication is one of a plurality of communication methods including at least one of broadcast, multicast, and unicast as the information on the side link communication, and

[0449] The determination unit determines whether feedback is enabled based on information for identifying a communication method of the side link communication.

[0450] (13) The information processing device according to (12), wherein

[0451] the acquiring unit acquires, as the information on the side link communication, information for identifying which of the plurality of communication methods including at least broadcasting the communication method used in the side link communication is; and

[0452] When the communication method for the side link communication is broadcasting, the determination unit determines that feedback is disabled.

[0453] (14) The information processing device according to (12), wherein

[0454] the acquiring unit acquires, as the information on the side link communication, information for identifying which of the plurality of communication methods including at least multicast is a communication method used in the side link communication, and

[0455] When the communication mode for the side link communication is multicast, the determination unit determines that feedback is enabled.

[0456] (15) The information processing device according to (12), wherein

[0457] the acquiring unit acquires, as the information on the side link communication, information for identifying which of the plurality of communication methods including at least unicast a communication method used in the side link communication is; and

[0458] When the communication mode used for the side link communication is unicast, the determination unit determines to enable feedback.

[0459] (16) The information processing device according to (1), wherein

[0460] an acquisition unit acquires information for identifying which device is the device that decides the radio resources for data retransmission as information on the side link communication, and

[0461] The determination unit determines whether to enable feedback based on information for identifying a device that determines radio resources for data retransmission.

[0462] (17) The information processing device according to (16), wherein

[0463] When the device that decides the radio resources for data retransmission is the base station device, the determination unit determines to disable direct feedback from the receiving device to the transmitting device for side link communication and determines to enable feedback from the receiving device to the base station device.

[0464] (18) The information processing device according to (16), wherein

[0465] In a case where the device that decides the radio resources for data retransmission is a master communication device that controls side link communication between slave communication devices via side link communication, the determination unit determines to disable direct feedback from the receiving device to the transmitting device for the side link communication, and determines to enable feedback from the receiving device to the master communication device.

[0466] (19) The information processing device according to (1), wherein

[0467] an acquisition unit acquires information on a resource pool of radio resources used in the side link communication as information on the side link communication, and

[0468] The determination unit determines whether to enable feedback based on information about the resource pool.

[0469] (20) The information processing device according to (1), wherein

[0470] an acquisition unit acquires information indicating the number of receiving devices of the side link communication as information on the side link communication, and

[0471] The determination unit determines whether feedback is enabled based on information indicating the number of receiving devices.

[0472] (21) The information processing device according to (20), wherein

[0473] When the number of receiving devices is greater than a predetermined number, the determination unit determines that feedback is disabled.

[0474] (22) The information processing device according to (20) or (21), wherein

[0475] When the number of receiving devices is less than a predetermined number, the determination unit determines to start feedback.

[0476] (23) The information processing device according to (1), wherein

[0477] an acquisition unit acquires information indicating a type of communication service performed using the side link communication as information on the side link communication, and

[0478] The determination unit determines whether to enable feedback based on information indicating the type of communication service.

[0479] (24) The information processing device according to (23), wherein

[0480] When the type of communication service performed by using the side link communication is ultra reliable and low latency communication (URLLC), the determination unit determines that feedback is disabled.

[0481] (25) The information processing device according to any one of (1) to (24), wherein

[0482] The automatic retransmission requirement includes multiple modes in which at least one of the feedback path and the device for determining the radio resources for data retransmission is different, and

[0483] The determination unit determines a mode to be used for the automatic retransmission request from among a plurality of modes based on information on the side link communication.

[0484] (26) The information processing device according to (25), wherein

[0485] The plurality of modes includes at least a first mode in which feedback is transmitted from a receiving device of the sidelink communication to a transmitting device of the sidelink communication via the sidelink communication.

[0486] (27) The information processing device according to (25) or (26), wherein

[0487] The plurality of modes include at least a second mode in which a base station device connected via a radio connection to a transmitting device or a receiving device of the sidelink communication transmits feedback from the receiving device of the sidelink communication to the transmitting device.

[0488] (28) The information processing device according to any one of (25) to (27), wherein

[0489] The plurality of modes include at least a third mode in which feedback is transmitted from a receiving device of a sidelink communication to a transmitting device via a master communication device, the master communication device controlling the sidelink communication between slave communication devices via the sidelink communication.

[0490] (29) The information processing device according to any one of (25) to (28), wherein

[0491] The plurality of modes include at least a fourth mode, in which a transmitting device of the side link communication determines resources for data retransmission by itself.

[0492] (30) The information processing device according to any one of (25) to (29), wherein

[0493] The plurality of modes include at least a fifth mode in which a base station device radio-connected to a transmitting device for sidelink communication determines resources for retransmitting data to the transmitting device.

[0494] (31) The information processing device according to any one of (25) to (30), wherein

[0495] The plurality of modes include at least a sixth mode in which a master communication device controlling sidelink communication between slave communication devices via the sidelink communication determines resources for retransmitting data to a transmitting device of the sidelink communication.

[0496] (32) The information processing device according to any one of (1) to (31), wherein

[0497] The information processing device is a communication device capable of performing side link communication, and

[0498] A notification unit is included that notifies a determination result of the determination unit to one or more communication devices that are counterpart devices in the side link communication.

[0499] (33) The information processing device according to any one of (1) to (31), wherein

[0500] The information processing device is a base station device capable of performing radio communication with a plurality of communication devices performing side link communication, and

[0501] A notification unit is included that notifies one or more of the plurality of communication devices that perform side link communication of a determination result by the determination unit.

[0502] (34) The information processing device according to any one of (1) to (31), wherein

[0503] The information processing device is a master communication device that controls the side link communication between slave communication devices via the side link communication, and

[0504] A notification unit is included that notifies one or more of the slave communication devices that perform the side link communication of a determination result by the determination unit.

[0505] (35) The information processing device according to any one of (1) to (34), wherein

[0506] The feedback is HARQ (Hybrid Automatic Repeat Request) feedback.

[0507] (36) An information processing method comprising:

[0508] obtaining information about sidelink communications; and

[0509] Based on the information about the sidelink communication, it is determined whether to enable feedback related to an automatic retransmission requirement of data in the sidelink communication.

[0510] (37) An information processing program that enables a computer to

[0511] an acquisition unit that acquires information about the side link communication, and

[0512] A determination unit determines whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on information about the side link communication.

[0513] (38) A communication device comprising:

[0514] an acquisition unit that acquires information about the side link communication and acquires information indicating a result of determination from an information processing device, the information processing device determining whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on the information about the side link communication; and

[0515] The communication control unit performs feedback when data is received via the side link communication if the result of the determination is information indicating that feedback is enabled, and does not perform feedback when data is received via the side link communication if the result of the determination is information indicating that feedback is enabled.

[0516] (39) A communication method comprising:

[0517] acquiring information about the side link communication, and acquiring information indicating a result of determination from an information processing device, the information processing device determining whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on the information about the side link communication, and

[0518] In the case where the result of the determination is information indicating that feedback is enabled, feedback is performed when data is received via the side link communication, and in the case where the result of the determination is information indicating that feedback is enabled, feedback is not performed when data is received via the side link communication.

[0519] (40) A communications program that enables a computer to be used as

[0520] an acquisition unit that acquires information about the side link communication and acquires information indicating a result of determination from an information processing device that determines whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on the information about the side link communication, and

[0521] The communication control unit performs feedback when data is received via the side link communication if the result of the determination is information indicating that feedback is enabled, and does not perform feedback when data is received via the side link communication if the result of the determination is information indicating that feedback is enabled.

[0522] Reference numerals list

[0523] 1 Information Processing System

[0524] 10. Manage Devices

[0525] 20,30 Base station equipment

[0526] 40 Terminal equipment

[0527] 50 Mobile devices

[0528] 11, 23, 33, 43, 53 Network communication unit

[0529] 12, 22, 32, 42, 52 memory cells

[0530] 13, 24, 34, 45, 55 Control unit

[0531] 21, 31, 41, 51 Radio communication units

[0532] 44, 54 Input / Output Units

[0533] 211, 311, 411, 511 receiving processing unit

[0534] 212, 312, 412, 512 Send processing unit

[0535] 213, 313, 413, 513 antennas

[0536] 241, 341, 451, 551 Get Unit

[0537] 242, 342, 452, 552 discrimination units

[0538] 243, 343, 453, 553 Notification Unit

[0539] 244, 344, 454, 554 Communication control unit

Claims

1. An information processing device, comprising: an acquisition unit, the acquisition unit acquiring information about the side link communication; as well as a determination unit, the determination unit determining whether to enable feedback related to an automatic retransmission requirement of data in the side link communication based on information about the side link communication, in an acquisition unit acquires information indicating whether other reception devices for which feedback is enabled are located within a predetermined range of the first communication device as the reception device for the side link communication as information on the side link communication, and The determination unit determines whether to enable feedback of the first communication device based on information about whether the other receiving device that enables feedback is located within the predetermined range; in When the other receiving devices with feedback enabled are within the predetermined range, the judging unit judges to disable feedback of the first communication device, and a) judges whether to perform data retransmission to the first communication device based on the feedback of the other receiving devices, or b) judges a data transmission method for transmitting data to the first communication device from a plurality of data transmission methods based on the feedback of the other receiving devices.

2. The information processing device according to claim 1, wherein The automatic retransmission request has multiple modes with different forms from feedback to data retransmission, and The determination unit determines a mode to be used for the automatic retransmission request from among the plurality of modes based on information on the side link communication.

3. The information processing device according to claim 1, wherein an acquisition unit acquires at least one of distance information indicating a distance between communication devices performing side link communication and position information indicating a position of the communication device performing side link communication as information on the side link communication, and The determination unit determines whether feedback is enabled based on the at least one piece of information among the distance information and the position information.

4. The information processing device according to claim 1, wherein an acquisition unit acquires information on a reliability requirement or a delay requirement for transmission data of the side link communication as information on the side link communication, and The determination unit determines whether to enable feedback based on information about the reliability requirement or the delay requirement.

5. The information processing device according to claim 1, wherein an acquisition unit acquires information indicating a congestion degree of radio resources used for side link communication as information on the side link communication, and The determination unit determines whether to enable feedback based on information indicating the degree of congestion.

6. The information processing device according to claim 1, wherein the acquiring unit acquires information on the flow rate of the side link communication as the information on the side link communication, and The determination unit determines whether to enable feedback based on information about the flow rate.

7. The information processing device according to claim 1, wherein an acquisition unit acquires information for identifying which communication method used in the side link communication is one of a plurality of communication methods including at least one of broadcast, multicast, and unicast as the information on the side link communication, and The determination unit determines whether feedback is enabled based on information for identifying a communication method of the side link communication.

8. The information processing device according to claim 1, wherein The acquiring unit acquires information for identifying which device is the device that decides the radio resources for data retransmission as the information on the side link communication, and The determination unit determines whether to enable feedback based on information for identifying a device that determines radio resources for data retransmission.

9. The information processing device according to claim 1, wherein an acquisition unit acquires information on a resource pool of radio resources used in the side link communication as information on the side link communication, and The determination unit determines whether to enable feedback based on information about the resource pool.

10. The information processing device according to claim 1, wherein an acquisition unit acquires information indicating the number of receiving devices of the side link communication as information on the side link communication, and The determination unit determines whether feedback is enabled based on information indicating the number of receiving devices.

11. The information processing device according to claim 1, wherein an acquisition unit acquires information indicating a type of communication service performed using the side link communication as information on the side link communication, and The determination unit determines whether to enable feedback based on information indicating the type of communication service.

12. The information processing device according to claim 1, wherein The information processing device is a communication device capable of performing side link communication, and A notification unit is included that notifies a determination result of the determination unit to one or more communication devices that are counterpart devices in the side link communication.

13. The information processing device according to claim 1, wherein The information processing device is a base station device capable of performing radio communication with a plurality of communication devices performing side link communication, and A notification unit is included that notifies one or more of the plurality of communication devices that perform side link communication of a determination result by the determination unit.

14. The information processing device according to claim 1, wherein The information processing device is a master communication device that controls the side link communication between the slave communication devices via the side link communication, and A notification unit is included that notifies one or more of the slave communication devices that perform the side link communication of a determination result by the determination unit.

15. The information processing device according to claim 1, wherein The feedback is HARQ (Hybrid Automatic Repeat Request) feedback.

16. An information processing method, comprising: obtaining information about sidelink communications; as well as Based on the information about the sidelink communication, determining whether to enable feedback related to an automatic retransmission requirement of data in the sidelink communication, in The acquiring further acquires information indicating whether the other receiving device for which feedback is enabled is located within a predetermined range of the first communication device as the receiving device for the sidelink communication as the information on the sidelink communication; as well as The determination is further based on information about whether the other receiving devices that enable feedback are located within the predetermined range to determine whether to enable feedback from the first communication device; in When the other receiving devices with feedback enabled are within the predetermined range, the determination is further to disable feedback of the first communication device, and a) determine whether to perform data retransmission to the first communication device based on the feedback of the other receiving devices, or b) determine a data transmission method for transmitting data to the first communication device from a plurality of data transmission methods based on the feedback of the other receiving devices.

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