WO2018084178A1 - Server device and communication method - Google Patents

Server device and communication method Download PDF

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Publication number
WO2018084178A1
WO2018084178A1 PCT/JP2017/039537 JP2017039537W WO2018084178A1 WO 2018084178 A1 WO2018084178 A1 WO 2018084178A1 JP 2017039537 W JP2017039537 W JP 2017039537W WO 2018084178 A1 WO2018084178 A1 WO 2018084178A1
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WIPO (PCT)
Prior art keywords
communication
terminal
cost
information
server
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PCT/JP2017/039537
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French (fr)
Japanese (ja)
Inventor
辰徳 小原
真平 安川
聡 永田
理一 工藤
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株式会社Nttドコモ
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Application filed by 株式会社Nttドコモ filed Critical 株式会社Nttドコモ
Priority to JP2018549037A priority Critical patent/JP7086851B2/en
Publication of WO2018084178A1 publication Critical patent/WO2018084178A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling

Definitions

  • the present invention relates to a server device and a communication method.
  • V2X Vehicle-to-everything
  • ITS Intelligent Transport Systems
  • V2X communication includes vehicle-to-vehicle communication (V2V communication), vehicles and infrastructure such as roadside units (Road Side Unit) installed in traffic lights or signs, or cellular networks. Communication (V2I communication / V2N communication), communication between a vehicle and a pedestrian (Pedestrian) (V2P communication), and the like.
  • V2V communication vehicle-to-vehicle communication
  • vehicles and infrastructure such as roadside units (Road Side Unit) installed in traffic lights or signs, or cellular networks.
  • Communication V2I communication / V2N communication
  • V2P communication communication between a vehicle and a pedestrian (Pedestrian) (V2P communication), and the like.
  • V2X communication introduction of a new communication method is being studied.
  • a wireless LAN such as IEEE802.11p
  • a cellular network such as LTE (Long Terminology Evolution), or 5G (5th generation Genuine mobile communication system) can be cited.
  • LTE Long Terminology Evolution
  • 5G 5th generation Genuine mobile communication system
  • V2X communication In the future, for the realization of V2X communication, collection of environmental information indicating the road environment will become more active, and the traffic of sensor information (that is, uplink (UL) data) from vehicles will increase dramatically. Is assumed. Similarly, in V2X communication, it is assumed that the capacity of download information (ie, downlink (DL) data) such as in-car entertainment information or advanced map information will increase.
  • download information ie, downlink (DL) data
  • V2X communication it is required to perform DL data communication to a terminal (sometimes called a UE (User (Equipment)) at a lower cost.
  • a terminal sometimes called a UE (User (Equipment)
  • One aspect of the present invention is to provide a server device and a communication method capable of performing DL data communication to a terminal at lower cost in V2X communication.
  • the communication cost is less than a first threshold based on a communication cost in a communication area where at least one terminal can communicate and a position of the at least one terminal.
  • a determination unit that determines a first terminal that receives downlink data in one communication area; and a communication unit that transmits downlink data in the first communication area to the first terminal.
  • DL data communication to a terminal can be performed at a lower cost.
  • V2X communication Unlike normal data communication, the traffic downloaded by a terminal in V2X communication is requested with a priority on reducing communication cost (sometimes called "bit cost” or simply “cost") rather than improving communication quality. Is done.
  • the download information in V2X communication also includes information that is relatively urgent and does not require download with low delay.
  • Communication cost is an index indicating how much communication unit price can be used in the terminal.
  • the communication cost is at least one of the unit price used for communication per unit time, the amount of resources occupied in communication, and the frequency utilization efficiency per transmission (MCS (Modulation Coding Scheme) or scheduling policy). It may be calculated based on this.
  • MCS Modulation Coding Scheme
  • the parameters used for calculating the communication cost are not limited to these, and may be parameters related to the communication fee charged to the terminal.
  • the present inventors examined a communication method capable of performing DL data transmission to a terminal at lower cost in V2X communication.
  • the communication cost depends on the operation cost of the base station. Further, the operation cost of the base station is determined according to the communication area in which the terminal can communicate and the peak communication amount in time. That is, as the communication amount at the peak time increases, the operation cost of the base station increases, and as a result, the communication cost increases.
  • the inventors of the present invention focused on this point and reached the present invention. Specifically, in a communication area (coverage) in which the terminal can communicate, an area where the communication cost is low or a transmission time (timing) where the communication cost is low is specified, and the communication cost is low for the terminal. It came to receive DL data by area or transmission time.
  • V2X communication it is not always necessary to uniquely determine a terminal that receives download information.
  • An ITS system using V2X communication may be transmitted to an area (communication) corresponding to an area or transmission time where the communication cost is low.
  • FIG. 1 shows a configuration example of a communication system according to the present embodiment.
  • the communication system shown in FIG. 1 includes at least an ITS server (server device) 100, a core network node (core NW node) 200, a base station (sometimes called an eNB) 300, and a terminal 400.
  • the core NW node 200, the base station 300, and the terminal 400 configure, for example, a cellular network (for example, a 5G system).
  • the ITS server 100 is an application server that provides an ITS service using V2X communication.
  • the ITS server 100 collects environmental information regarding the road environment in the communication area covered by the base station 300 from the terminal 400 mounted on each of the plurality of vehicles, and based on the collected environmental information, automatic driving or Performs ITS service processing such as traffic accident prevention.
  • the ITS server 100 transmits download information (DL data) regarding the ITS service to the terminal 400.
  • the download information includes information common to each terminal 400 such as map information.
  • the ITS server 100 also includes information indicating communication costs in each communication area of the base station 300 (hereinafter referred to as “cost information”) and information indicating the position of the terminal 400 (hereinafter referred to as “position information”). ) To determine a terminal 400 that performs communication requiring a low cost in the communication area and transmission time required for DL data communication (hereinafter referred to as “low cost communication”). Then, the ITS server 100 transmits DL data to the determined terminal 400 in a communication area and communication time in which low-cost communication is possible.
  • cost information information indicating communication costs in each communication area of the base station 300
  • position information information indicating the position of the terminal 400
  • the ITS server 100 acquires information indicating the wireless quality of the terminal 400 (hereinafter referred to as “quality information”), and the terminal 400 whose wireless quality is equal to or higher than a predetermined threshold (the terminal 400 having good wireless quality). ) DL data may be transmitted.
  • the ITS server 100 may acquire cost information from the core NW node 200, or may hold cost information set in advance according to the communication area or transmission time.
  • the communication cost may be associated with, for example, a combination of a communication area in which the terminal 400 can communicate and a transmission time in the communication area. In the cost information, any one of the communication area and the transmission time may be associated with the communication cost.
  • the cost information may be generated in the core NW node 200 or may be generated in the ITS server 100. When generating cost information in the ITS server 100, the ITS server 100 acquires parameters (position information of the terminal 400, charging information, etc.) necessary for generating the cost information from the core NW node 200.
  • the core NW node 200 accommodates at least one radio access network (base station 300).
  • the core NW node 200 includes, for example, a location registration server 201 (for example, MME (Mobility Management Entity)) that registers the location of the terminal 400 within the communication area of the base station 300, and a billing server 202 that manages billing of each terminal 400.
  • a gateway (GW) 203 connected to an external system (for example, the ITS server 100).
  • the billing server 202 manages cost information in the communication area of each base station 300 in addition to processing for managing billing of each terminal 400, for example.
  • the accounting server 202 associates the location of the terminal 400 registered in the location registration server 201 with the accounting information of the terminal 400 at the location, so that communication is performed at what communication cost in each communication area. Is managed as cost information.
  • the base station 300 communicates by connecting to the terminal 400 or the core NW node 200 existing in the communication area covered by the own station. In addition, the base station 300 allocates DL resources to DL data from the ITS server 100 to the terminal 400, and transmits DL data using the DL resources.
  • the terminal 400 for example, uploads UL data (environment information) indicating the result of sensing performed by a sensor installed in the vehicle to the ITS server 100 via the base station 300 and the core NW node 200. Further, the terminal 400 receives DL data (download information such as map information) from the ITS server 100.
  • UL data environment information
  • DL data download information such as map information
  • the terminal 400 may support both low-cost communication such as V2X communication and communication that does not require low cost such as normal data communication (hereinafter referred to as “normal cost communication”).
  • each communication may be distinguished by a “cost class” in which communication (low cost communication and normal cost communication) is classified according to a required communication cost.
  • the cost class may be distinguished according to QCI (Quality Service Class Identifier).
  • a plurality of logical connections are performed between the terminal 400 and the core NW node 200, and cost classes are distinguished for each logical connection. May be.
  • a lower layer physical (PHY) layer, MAC, etc.
  • an upper layer application layer, IP (Internet protocol) layer, etc.
  • Downlink transmission packet is passed to (Medium Access Control) layer.
  • the base station 300 may transmit a packet by distinguishing low-cost communication and normal-cost communication in packet units or logical channel units in the lower layer.
  • the base station 300 does not output a downlink transmission packet from the upper layer to the lower layer when the predetermined condition is not satisfied. By this processing, communication that is unintentionally expensive can be avoided.
  • FIG. 2 is a diagram illustrating a configuration example of the ITS server 100 according to the present embodiment.
  • the ITS server 100 illustrated in FIG. 2 employs a configuration including a cost information acquisition unit 101, a terminal information acquisition unit 102, a determination unit 103, and a communication unit 104.
  • Cost information acquisition unit 101 acquires cost information indicating the communication cost in each communication area of base station 300 from core NW node 200 via communication unit 104. Specifically, the cost information acquisition unit 101 transmits signaling for inquiring cost information to the core NW node 200 via the communication unit 104. Then, the cost information acquisition unit 101 outputs the cost information acquired by the inquiry to the determination unit 103.
  • the ITS server 100 may hold cost information in advance. In this case, the ITS server 100 does not require processing for acquiring cost information from the core NW node 200 (that is, the cost information acquisition unit 101).
  • the terminal information acquisition unit 102 acquires terminal information including position information indicating the position of the terminal 400 and quality information indicating radio quality in the terminal 400 from the core NW node 200 via the communication unit 104.
  • the terminal information acquisition unit 102 may acquire the terminal information by transmitting signaling for querying the terminal information to the core NW node 200 or the terminal 400 via the communication unit 104.
  • the terminal information transmitted from the terminal 200 or the terminal 400 at a predetermined timing or periodically may be acquired. Then, the terminal information acquisition unit 102 outputs the acquired terminal information to the determination unit 103.
  • the determination unit 103 Based on the cost information input from the cost information acquisition unit 101 and the terminal information (position information, quality information) input from the terminal information acquisition unit 102, the determination unit 103 receives the DL data, and The communication area and the transmission time for transmitting DL data to the terminal 400 that is the transmission destination of the DL data are determined.
  • the determination unit 103 identifies the communication area and the transmission time of the communication cost classified as low among the communication costs included in the cost information (for example, the communication area and the transmission time whose communication cost is less than a predetermined threshold). To do. Then, the determination unit 103 determines a terminal 400 that receives DL data in a communication area and transmission time in which low-cost communication is possible (that is, a terminal 400 that can perform low-cost communication in the downlink).
  • the determination unit 103 determines whether or not the wireless quality indicated in the quality information is equal to or higher than a threshold (whether or not the wireless quality is good) for the terminal 400 capable of low-cost communication. Then, the determination unit 103 determines a terminal 400 having good radio quality and capable of low-cost communication as a DL data transmission destination terminal.
  • the determining unit 103 outputs a DL data transmission instruction to the communication unit 104 for the terminal 400 determined as the DL data transmission destination.
  • the communication unit 104 transmits DL data to the target terminal 400 in accordance with a transmission instruction output from the determination unit 103.
  • the ITS server 100 determines the terminal 400 capable of low-cost communication for the communication area and transmission time with low communication cost.
  • the present invention is not limited to this processing, and for example, the ITS server 100 may determine the terminal 400 capable of low-cost communication for either one of the communication area and the transmission time.
  • the ITS server 100 may specify the base station 300 having a transmission time capable of low-cost communication, and determine the terminal 400 capable of communication at the transmission time in the specified base station 300.
  • FIG. 3 is a diagram illustrating a configuration example of the terminal 400 according to the present embodiment.
  • a terminal 400 illustrated in FIG. 3 employs a configuration including a position information generation unit 401, a radio quality measurement unit 402, and a communication unit 403.
  • the position information generation unit 401 generates position information indicating the position of the own device.
  • the position information generation unit 401 may measure the position of its own device by GPS (Global Positioning System) or the like, and generate position information indicating a positioning result.
  • the position information generating unit 401 may use information indicating the area where the device is located (for example, a cell ID, TA (Tracking Area), TA area list, etc.) as the position information.
  • the position information generation unit 401 may acquire information indicating the travel position (or planned travel position) of the vehicle from the car navigation system of the vehicle on which the terminal 400 is mounted, and use the information as the position information.
  • the position information generation unit 401 outputs the position information to the communication unit 403.
  • the wireless quality measuring unit 402 measures the wireless quality between the own device and the base station 300 to which the own device is connected. Examples of radio quality include received power, RSSI (Received Signal Strength Indicator), RSRP (Reference Signal Received Power), SINR (Signal Signal Interference and Noise Ratio), RSRQ (Reference Signal Received Quality), and the like.
  • the radio quality measuring unit 402 outputs quality information indicating the measured radio quality to the communication unit 403.
  • the communication unit 403 transmits the position information input from the position information generation unit 401, the quality information input from the wireless quality measurement unit 402, or UL data to the base station 300. In addition, the communication unit 403 receives DL data transmitted from the ITS server 100 via the base station 300.
  • the terminal in (i) the cost information and terminal information acquisition method performed by the ITS server 100, (ii) the DL data transmission control method performed by the ITS server 100, and (iii) the cost information used by the ITS server 100
  • the relationship between 400 positions and communication costs will be described in detail.
  • FIG. 4 is a diagram illustrating an operation example of the communication system when the ITS server 100 acquires cost information.
  • the ITS server 100 transmits signaling for inquiring cost information to the core NW node 200 (for example, the billing server 202).
  • the core NW node 200 when the core NW node 200 receives signaling for inquiring cost information from the ITS server 100, the core NW node 200 transmits the held cost information to the ITS server 100.
  • the ITS server 100 may hold
  • FIG. 5 is a diagram illustrating an operation example of the communication system when the ITS server 100 acquires terminal information.
  • terminal 400 reports position information (for example, a location area or a positioning result) indicating the position of terminal 400 to core NW node 200.
  • position information for example, a location area or a positioning result
  • quality information indicating the radio quality in terminal 400 to core NW node 200.
  • core NW node 200 transmits terminal information including location information and quality information of terminal 400 reported in ST201 and ST202 to ITS server 100.
  • the terminal 400 may report the position information and the quality information to the core NW node 200 in ST201 and ST202, for example, when receiving the signaling for inquiring the position information or the quality information from the ITS server 100.
  • terminal 400 may report position information and quality information to core NW node 200 in ST201 and ST202 at a predetermined timing or periodically, independently of the operation of ITS server 100.
  • the terminal 400 that is required to be low in cost (the terminal 400 that is the target of cost reduction) is compared with the terminal 400 that is not the target of cost reduction, for example, the positional information (for example, the area within the area)
  • the quality information may be reported to the core NW node 200 in a narrow area or with high frequency.
  • the ITS server 100 can acquire more accurate position information or quality information of the terminal 400.
  • the cost reduction target terminal 400 reports the position information or the quality information at a high frequency
  • the ITS server 100 can acquire the position information or the quality information reflecting the current state of the terminal 400, and the DL data The accuracy of transmission control can be improved.
  • the core NW node 200 may transmit the terminal information to the ITS server 100 each time the position information of the terminal 400 is registered in the position registration server 201, and the terminal of the terminal 400 that is a target of low-cost communication. Information may be periodically transmitted to the ITS server 100.
  • the ITS server 100 may inquire in the order of terminal information and cost information, or may inquire both cost information and terminal information at the same time.
  • the terminal 400 When transmitting DL data from the ITS server 100, the terminal 400 is in a state of being connected (accessed) to the base station 300 (Connected state) and in a state of not being connected to the base station 300 (Idle state). It is assumed that there is a certain case.
  • 6A and 6B are diagrams illustrating an example of DL data transmission control when the terminal 400 is in the Connected state.
  • the ITS server 100 can perform low-cost communication based on cost information and terminal information (position information and quality information) acquired as shown in FIG. 4 or FIG. It is determined whether there is a terminal 400 serving as a DL data transmission destination in the area (position determination).
  • the cost information when the communication cost is associated with the combination of the communication area and the transmission time in the communication area, the ITS server 100 determines whether the DL data is in the combination of the communication area and the transmission time capable of low-cost communication. It may be determined whether or not there is a terminal 400 serving as a transmission destination.
  • the ITS server 100 determines whether or not the wireless quality of the terminal 400 is good based on the quality information (quality determination).
  • the ITS server 100 can perform low-cost communication to the terminal 400 in ST302.
  • DL data is transmitted in a proper communication area or transmission time.
  • the ITS server 100 when there is no terminal 400 capable of low-cost communication (determination result: NO), the ITS server 100 does not perform DL data transmission processing. For example, the ITS server 100 holds DL data for a certain period (waits for transmission). Note that the ITS server 100 may transmit the DL data in the same manner as in FIG. 6A when it is determined that the terminal 400 is capable of low-cost communication while holding the DL data (waiting for transmission).
  • the terminal 400 discards the DL data (packet) when a certain period of time has elapsed after holding the DL data (for example, when the timer expires) or when it is determined to discard the DL data (ST303).
  • the ITS server 100 can perform communication at a low cost based on the cost information, the position information of the terminal 400, and the quality information, or the transmission time (communication area or transmission time where the communication cost is less than the threshold).
  • the terminal 400 which becomes the transmission destination of DL data is determined. By this processing, the terminal 400 can receive DL data with low cost and good radio quality.
  • the ITS server 100 predicts a position where the terminal 400 will move in the future, for example, and a terminal that is a transmission destination of DL data in a communication area where low-cost communication is possible based on the position of the destination of the terminal 400 400 may be determined. For example, the ITS server 100 may predict the future position of the terminal 400 using the travel plan in the car navigation system of the vehicle on which the terminal 400 is mounted as the position information. If there is a terminal 400 that is a DL data transmission destination in a communication area where low-cost communication is possible, the ITS server 100 may secure (reserve) a DL data reception opportunity for the terminal 400. . With this process, the ITS server 100 can more flexibly perform DL data transmission control using low-cost communication using not only the current position of the terminal 400 but also a position where the terminal 400 will move in the future.
  • the ITS server 100 can transmit DL data only to the terminal 400 that exists in the communication area where low-cost communication is possible, and the communication cost of each terminal 400 can be reduced.
  • a downlink (DL) reception process may be a trigger.
  • the following method can be cited as a condition for transitioning to the Connected state by a DL reception trigger.
  • the terminal 400 transitions from the Idle state to the Connected state according to the following conditions.
  • a base station that transmits Paging (hereinafter referred to as a Paging transmission base station) is selected based on the communication cost in addition to the location registration area of the terminal 400.
  • the base station 300 having an area with a low communication cost (for example, the minimum communication cost) is selected from the base stations 300 that can be connected to the terminal 400.
  • the Paging transmission base station transmits the Paging to the terminal 400.
  • the terminal 400 transitions from the Idle state to the Connected state with the reception of Paging as a trigger.
  • examples of the method for determining the base station 300 that transmits Paging to the terminal 400 as the Paging transmission base station include the following methods (1) and (2).
  • FIG. 7 is a diagram illustrating a method for determining a Paging transmission base station in the determination method (1).
  • the ITS server 100 transmits an upper layer (for example, IP layer) packet to the core NW node 200.
  • the header of this packet includes cost information regarding communication costs in the plurality of base stations 300.
  • the core NW node 200 confirms the packet header from the ITS server 100 and identifies cost information (for example, cost class) of a plurality of base stations 300 connectable to the terminal 400.
  • cost information for example, cost class
  • the core NW node 200 selects a Paging transmission base station from the plurality of base stations 300 based on the cost information. For example, the core NW node 200 may select a base station 300 whose cost class satisfies a predetermined condition (communication cost is less than a predetermined threshold) as a Paging transmission base station.
  • a predetermined condition communication cost is less than a predetermined threshold
  • the core NW node 200 instructs the base station 300 selected as the paging transmission base station to transmit paging to the terminal 400.
  • base station 300 Paging transmission base station
  • Paging transmission base station transmits Paging to terminal 400.
  • the terminal 400 transitions from the Idle state to the Connected state.
  • FIG. 8 is a diagram illustrating a method for determining a Paging transmission base station in the determination method (2).
  • the ITS server 100 transmits a packet to the core NW node 200.
  • core NW node 200 selects a Paging transmission base station (candidate) from among a plurality of base stations 300 based on, for example, the location registration area of transmission destination terminal 400 of the packet received from ITS server 100. .
  • the core NW node 200 instructs the base station 300 selected as the paging transmission base station to transmit paging to the terminal 400.
  • base station 300 that has received the Paging transmission instruction transmits Paging to terminal 400 based on, for example, the cost class for each logical connection (for example, bearer or PDN connection) or QCI (QoS Class Identifier). It is determined whether or not. For example, the base station 300 may determine to transmit the paging to the terminal 400 when its own cost class satisfies a predetermined condition (communication cost is less than a predetermined threshold).
  • a predetermined condition communication cost is less than a predetermined threshold.
  • base station 300 transmits Paging to terminal 400.
  • the terminal 400 transitions from the Idle state to the Connected state.
  • base station 300 requests core NW node 200 to reselect a Paging transmission base station (candidate).
  • the core NW node 200 reselects the Paging transmission base station, for example, in the same manner as ST502.
  • the core NW node 200 or the base station 300 selects the Paging transmission base station based on the cost class.
  • the terminal 400 can receive DL data from the ITS server 100 at low cost through the base station 300 having an area with low communication cost after transitioning to the Connected state.
  • the billing server 202 in the core NW node 200 associates the position (communication area) where the terminal 400 communicates with the communication cost (communication charge, etc.) of the terminal 400 at the position. Further, billing server 202 may further associate the time when terminal 400 communicates with the communication cost of terminal 400 at that time.
  • the accounting server 202 acquires the location information of the terminal 400 by the following method.
  • the location registration server 201 notifies the billing server 202 of the location registration area of the terminal 400.
  • the location registration server 201 may notify the billing server 202 of the location registration area when the location registration area of the terminal 400 is updated or periodically.
  • the charging server 202 acquires the position of the terminal 400 measured by the terminal 400 or the position of the terminal 400 measured by a positioning server (not shown).
  • the billing server 202 may acquire the position information of the terminal 400 from the terminal 400 or the positioning server at the timing when the position of the terminal 400 is updated or periodically.
  • the billing server 202 determines the communication cost required for the DL data communication by the terminal 400, the location where the terminal 400 receives the DL data (that is, the communication area of the base station 300), or the terminal 400 receives the DL data. It can be managed as cost information in association with the received time.
  • the ITS server 100 acquires the cost information from the billing server 202, thereby identifying the area where each base station 300 can perform low-cost communication and the time during which low-cost communication is possible. For example, when the location of the terminal 400 is changed or when the terminal 400 communicates and is charged, the billing server 202 sets the communication cost, communication area (position of the terminal 400), and communication time managed as cost information. By updating, the accuracy of cost information can be improved.
  • the charging server 202 is not limited to the case of associating the actual communication cost itself when associating the communication cost with the location where the terminal 400 received the DL data.
  • the accounting server 202 reports the predicted position of the movement route of the terminal 400 as a position where the terminal 400 communicates.
  • the charging server 202 may associate a value obtained by adding a predetermined value (penalty) to the actual communication cost with the predicted position. .
  • the communication cost associated with the predicted position becomes higher than the actual communication cost, so the reliability of the predicted position is lowered, and the ITS server 100 is an area where low-cost communication is possible for the predicted position. It becomes difficult to be judged.
  • the ITS server 100 can perform communication at low cost based on the communication cost in the communication area in which at least one terminal 400 can communicate and the position of the terminal 400 (communication cost is a threshold value).
  • Terminal 400 (DL data transmission destination) that receives DL data is determined in the communication area or time), and DL data is transmitted to the determined terminal 400 in a communication area or time in which low-cost communication is possible.
  • each terminal 400 can receive DL data in a communication area or time with a lower communication cost.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
  • the server device, each device in the core NW node, the base station (wireless base station), and the terminal (user terminal) according to the embodiment of the present invention are used as computers that perform the processing of the communication method of the present invention. May function.
  • FIG. 9 is a diagram illustrating an example of a hardware configuration of the server device, each device in the core NW node, the base station, and the terminal according to the embodiment of the present invention.
  • the server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 described above physically include a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and the like. It may be configured as a computer device.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the server device 100, the core NW node 200, the base station 300, and the terminal 400 may be configured to include one or more of the devices illustrated in the figure, or may not include some devices. It may be configured.
  • Each function in the server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 is performed by causing the processor 1001 to perform calculation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002. This is realized by controlling communication by the communication device 1004 or reading and / or writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the cost information acquisition unit 101, the terminal information acquisition unit 102, the determination unit 103, the position information generation unit 401, the wireless quality measurement unit 402, and the like described above may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the determination unit 103 of the server device 100 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks.
  • the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.
  • the storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • a network device for example, the above-described communication units 104 and 403 may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
  • the server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and an FPGA (FPGA).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA FPGA
  • Hardware Field Programmable Gate Array
  • the processor 1001 may be implemented by at least one of these hardware.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, 5G + (5G plus), FRA (Future Radio). Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and / or next-generation systems extended based on them may be applied.
  • the specific operation assumed to be performed by the base station in this specification may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., It is obvious that this can be performed by MME (Mobility Management Entity) or S-GW (Serving Gateway).
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Information, signals, and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • Information, signal Information, signals, etc. described herein may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • radio resource may be indicated by an index.
  • a base station may accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services.
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein.
  • a base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.
  • the terminal is a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal by those skilled in the art , Wireless terminal, remote terminal, handset, user agent, mobile client, client, UE (User Equipment), or some other appropriate terminology.
  • determining may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
  • determination and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as “determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • connection means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof.
  • the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
  • electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • One embodiment of the present invention is useful for a mobile communication system.

Abstract

On the basis of a communication cost in a communication area in which at least one terminal is capable of communicating, and on the basis of the position of the at least one terminal, this server device determines a first terminal which is to be caused to receive downlink data in a first communication area having a communication cost that is less than a threshold, and transmits the downlink data to the first terminal in the first communication area.

Description

サーバ装置及び通信方法Server apparatus and communication method
 本発明は、サーバ装置及び通信方法に関する。 The present invention relates to a server device and a communication method.
 自動運転又は交通事故防止等のITS(Intelligent Transport Systems)サービスの高度化を実現するためにV2X(Vehicle to everything)通信を活用することが検討されている(例えば、非特許文献1を参照)。 Utilization of V2X (Vehicle-to-everything) communication is being considered in order to realize advanced ITS (Intelligent Transport Systems) services such as automatic driving or traffic accident prevention (for example, see Non-Patent Document 1).
 V2X通信には、車両(Vehicle)と車両との通信(V2V通信)、車両と、信号機又は標識等に設置される路側装置(Road Side Unit)等のインフラ(Infrastructure)又はセルラネットワーク(Network)との通信(V2I通信/V2N通信)、車両と歩行者(Pedestrian)との通信(V2P通信)等がある。 V2X communication includes vehicle-to-vehicle communication (V2V communication), vehicles and infrastructure such as roadside units (Road Side Unit) installed in traffic lights or signs, or cellular networks. Communication (V2I communication / V2N communication), communication between a vehicle and a pedestrian (Pedestrian) (V2P communication), and the like.
 また、V2X通信では、新たな通信方式の導入が検討されている。例えば、V2X通信に用いる通信システムの一例として、IEEE802.11p等の無線LAN、LTE(Long Term Evolution)、又は、5G(5th generation mobile communication system)等のセルラネットワークが挙げられる。 Also, in V2X communication, introduction of a new communication method is being studied. For example, as an example of the communication system used for V2X communication, a wireless LAN such as IEEE802.11p, a cellular network such as LTE (Long Terminology Evolution), or 5G (5th generation Genuine mobile communication system) can be cited.
 今後、V2X通信の実現に向けて、道路環境を示す環境情報の収集がより活発化し、車両からのセンサ情報(つまり、アップリンク(UL:Uplink)データ)の通信量が飛躍的に増加することが想定される。同様に、V2X通信では、車内エンターテイメント情報又は高度な地図情報などのダウンロード情報(つまり、ダウンリンク(DL:Downlink)データ)の大容量化が進むことも想定される。 In the future, for the realization of V2X communication, collection of environmental information indicating the road environment will become more active, and the traffic of sensor information (that is, uplink (UL) data) from vehicles will increase dramatically. Is assumed. Similarly, in V2X communication, it is assumed that the capacity of download information (ie, downlink (DL) data) such as in-car entertainment information or advanced map information will increase.
 V2X通信では、端末(UE(User Equipment)と呼ぶこともある)へのDLデータの通信をより低コストで行うことが要求される。 In V2X communication, it is required to perform DL data communication to a terminal (sometimes called a UE (User (Equipment)) at a lower cost.
 本発明の一態様は、V2X通信において、端末へのDLデータの通信をより低コストで行うことができるサーバ装置及び通信方法を提供することである。 One aspect of the present invention is to provide a server device and a communication method capable of performing DL data communication to a terminal at lower cost in V2X communication.
 本発明の一態様に係るサーバ装置は、少なくとも1つの端末が通信可能な通信エリアにおける通信コスト、及び、前記少なくとも1つの端末の位置に基づいて、前記通信コストが第1の閾値未満である第1の通信エリアにおいてダウンリンクデータを受信させる第1の端末を決定する決定部と、前記第1の端末に対して前記第1の通信エリアにおいてダウンリンクデータを送信する通信部と、を具備する。 In the server device according to one aspect of the present invention, the communication cost is less than a first threshold based on a communication cost in a communication area where at least one terminal can communicate and a position of the at least one terminal. A determination unit that determines a first terminal that receives downlink data in one communication area; and a communication unit that transmits downlink data in the first communication area to the first terminal. .
 本発明の一態様によれば、V2X通信において、端末へのDLデータの通信をより低コストで行うことができる。 According to one aspect of the present invention, in V2X communication, DL data communication to a terminal can be performed at a lower cost.
一実施の形態に係る通信システムの構成例を示す図である。It is a figure which shows the structural example of the communication system which concerns on one embodiment. 一実施の形態に係るITSサーバの構成例を示すブロック図である。It is a block diagram which shows the structural example of the ITS server which concerns on one embodiment. 一実施の形態に係る端末の構成例を示すブロック図である。It is a block diagram which shows the structural example of the terminal which concerns on one embodiment. 一実施の形態に係るコスト情報の取得方法の一例を示す図である。It is a figure which shows an example of the acquisition method of the cost information which concerns on one embodiment. 一実施の形態に係る端末情報の取得方法の一例を示す図である。It is a figure which shows an example of the acquisition method of the terminal information which concerns on one Embodiment. 一実施の形態に係るDLデータの送信制御方法の一例を示す図である。It is a figure which shows an example of the transmission control method of DL data which concerns on one Embodiment. 一実施の形態に係るDLデータの送信待機又は破棄の制御方法の一例を示す図である。It is a figure which shows an example of the control method of the transmission waiting or discard of DL data which concerns on one Embodiment. 一実施の形態に係るIdle状態からConnected状態へ遷移する方法の一例を示す図である。It is a figure which shows an example of the method which changes to the Connected state from the Idle state which concerns on one Embodiment. 一実施の形態に係るIdle状態からConnected状態へ遷移する方法の他の例を示す図である。It is a figure which shows the other example of the method which changes to the Connected state from the Idle state which concerns on one Embodiment. 本発明に係るサーバ装置、基地局及び端末のハードウェア構成の一例を示す図である。It is a figure which shows an example of the hardware constitutions of the server apparatus which concerns on this invention, a base station, and a terminal.
 (本発明に至った経緯)
 V2X通信において端末がダウンロードするトラフィックは、通常のデータ通信とは異なり、通信品質の向上よりも、通信コスト(「ビットコスト」又は単に「コスト」と呼ぶこともある)の低減が優先して要求される。また、V2X通信におけるダウンロード情報には、緊急性が比較的低く、低遅延でのダウンロードが要求されない情報も含まれる。
(Background to the present invention)
Unlike normal data communication, the traffic downloaded by a terminal in V2X communication is requested with a priority on reducing communication cost (sometimes called "bit cost" or simply "cost") rather than improving communication quality. Is done. The download information in V2X communication also includes information that is relatively urgent and does not require download with low delay.
 「通信コスト」は、端末においてどれくらいの通信単価にて通信が可能であるかを示す指標である。例えば、通信コストは、単位時間あたりの通信に使用されるビット単価、通信において占有されるリソース量、1送信あたりの周波数利用効率(MCS(Modulation and Coding Scheme)又はスケジューリングポリシ)の少なくとも一つに基づいて算出されてもよい。なお、通信コストの算出に用いるパラメータは、これらに限定されず、端末に課金される通信料金に関連するパラメータであればよい。 “Communication cost” is an index indicating how much communication unit price can be used in the terminal. For example, the communication cost is at least one of the unit price used for communication per unit time, the amount of resources occupied in communication, and the frequency utilization efficiency per transmission (MCS (Modulation Coding Scheme) or scheduling policy). It may be calculated based on this. Note that the parameters used for calculating the communication cost are not limited to these, and may be parameters related to the communication fee charged to the terminal.
 本発明者らは、V2X通信において、端末に対するDLデータ送信をより低コストで行うことができる通信方法を検討した。 The present inventors examined a communication method capable of performing DL data transmission to a terminal at lower cost in V2X communication.
 通信コストは、基地局の運用コストに依存する。また、基地局の運用コストは、端末が通信可能な通信エリア及び時間におけるピーク時の通信量に応じて決定される。すなわち、ピーク時の通信量が多いほど、基地局の運用コストが増加し、結果として、通信コストが増加してしまう。 The communication cost depends on the operation cost of the base station. Further, the operation cost of the base station is determined according to the communication area in which the terminal can communicate and the peak communication amount in time. That is, as the communication amount at the peak time increases, the operation cost of the base station increases, and as a result, the communication cost increases.
 よって、ピーク時の通信量を減らすために、通信量が多く、リソース利用率が高い通信エリア又は時間の通信単価を上げ、通信量が少なく、リソース利用率が低い通信エリア又は時間の通信単価を下げることにより、通信単価が低い通信エリア又は時間での通信を促す運用(例えば、オフロード、ピークシフト、ボトムアップと呼ぶこともある)を行うことが今後予想される。 Therefore, in order to reduce the peak traffic volume, increase the communication unit price for communication areas or hours with high communication volume and high resource usage rate, and increase the communication unit price for communication areas or time with low communication volume and low resource usage rate. In the future, it is expected that operations that encourage communication in a communication area or time with a low communication unit price (for example, sometimes referred to as off-road, peak shift, and bottom-up) will be performed.
 V2X通信におけるダウンリンクの通信では、低遅延でのダウンロードが要求されず、少なくとも地理的又は時間的に通信量をオフロードする送信制御が可能であることから、上記運用が適用される場合に、端末に対して、通信単価が低い通信エリア又は時間でのDLデータを受信させることにより、V2X通信での通信コストの低減要求に応えることができる。 In downlink communication in V2X communication, download with low delay is not required, and transmission control for offloading the amount of communication at least geographically or temporally is possible, so when the above operation is applied, By making the terminal receive DL data in a communication area or time with a low communication unit price, it is possible to meet a request for reducing communication costs in V2X communication.
 本発明者らは、この点に着目し、本発明に至った。具体的には、端末が通信可能な通信エリア(カバレッジ)において、通信コストが低くなるエリア、又は、通信コストが低くなる送信時間(タイミング)を特定し、端末に対して、通信コストが低くなるエリア又は送信時間でDLデータを受信させることに至った。 The inventors of the present invention focused on this point and reached the present invention. Specifically, in a communication area (coverage) in which the terminal can communicate, an area where the communication cost is low or a transmission time (timing) where the communication cost is low is specified, and the communication cost is low for the terminal. It came to receive DL data by area or transmission time.
 なお、V2X通信では、ダウンロード情報を受信する端末を必ずしも一意に定める必要はない。V2X通信を活用したITSシステムは、通信コストが低いエリア又は送信時間に対応する端末(車両)へ送信すればよい。 In V2X communication, it is not always necessary to uniquely determine a terminal that receives download information. An ITS system using V2X communication may be transmitted to an area (communication) corresponding to an area or transmission time where the communication cost is low.
 以下、本発明の一実施の形態について図面を参照して詳細に説明する。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
 [通信システムの構成]
 図1は、本実施の形態に係る通信システムの構成例を示す。図1に示す通信システムは、少なくとも、ITSサーバ(サーバ装置)100、コアネットワークノード(コアNWノード)200、基地局(eNBと呼ばれることもある)300、及び、端末400を含む。例えば、コアNWノード200、基地局300及び端末400は、例えば、セルラネットワーク(例えば、5Gシステム等)を構成する。
[Configuration of communication system]
FIG. 1 shows a configuration example of a communication system according to the present embodiment. The communication system shown in FIG. 1 includes at least an ITS server (server device) 100, a core network node (core NW node) 200, a base station (sometimes called an eNB) 300, and a terminal 400. For example, the core NW node 200, the base station 300, and the terminal 400 configure, for example, a cellular network (for example, a 5G system).
 ITSサーバ100は、V2X通信を用いたITSサービスを提供するアプリケーションサーバである。例えば、ITSサーバ100は、複数の車両の各々に搭載された端末400から、基地局300がカバーする通信エリア内の道路環境に関する環境情報を収集し、収集した環境情報に基づいて、自動運転又は交通事故防止等のITSサービスに関する処理を行う。また、ITSサーバ100は、ITSサービスに関するダウンロード情報(DLデータ)を端末400へ送信する。例えば、ダウンロード情報としては、地図情報等の各端末400に対して共通の情報が挙げられる。 The ITS server 100 is an application server that provides an ITS service using V2X communication. For example, the ITS server 100 collects environmental information regarding the road environment in the communication area covered by the base station 300 from the terminal 400 mounted on each of the plurality of vehicles, and based on the collected environmental information, automatic driving or Performs ITS service processing such as traffic accident prevention. In addition, the ITS server 100 transmits download information (DL data) regarding the ITS service to the terminal 400. For example, the download information includes information common to each terminal 400 such as map information.
 また、ITSサーバ100は、基地局300の通信エリアの各々における通信コストを示す情報(以下、「コスト情報」と呼ぶ)、及び、端末400の位置を示す情報(以下、「位置情報」と呼ぶ)に基づいて、DLデータの通信に要する通信コストが低い通信エリア及び送信時間において低コストを要求される通信(以下、「低コスト通信」と呼ぶ)を行う端末400を決定する。そして、ITSサーバ100は、決定した端末400に対して、低コスト通信が可能な通信エリア及び通信時間においてDLデータを送信する。さらに、ITSサーバ100は、端末400の無線品質を示す情報(以下、「品質情報」と呼ぶ)を取得して、無線品質が所定の閾値以上である端末400(無線品質が良好である端末400)に対してDLデータを送信してもよい。 The ITS server 100 also includes information indicating communication costs in each communication area of the base station 300 (hereinafter referred to as “cost information”) and information indicating the position of the terminal 400 (hereinafter referred to as “position information”). ) To determine a terminal 400 that performs communication requiring a low cost in the communication area and transmission time required for DL data communication (hereinafter referred to as “low cost communication”). Then, the ITS server 100 transmits DL data to the determined terminal 400 in a communication area and communication time in which low-cost communication is possible. Furthermore, the ITS server 100 acquires information indicating the wireless quality of the terminal 400 (hereinafter referred to as “quality information”), and the terminal 400 whose wireless quality is equal to or higher than a predetermined threshold (the terminal 400 having good wireless quality). ) DL data may be transmitted.
 なお、ITSサーバ100は、コアNWノード200からコスト情報を取得してもよく、通信エリア又は送信時間に応じて予め設定されたコスト情報を保持してもよい。 Note that the ITS server 100 may acquire cost information from the core NW node 200, or may hold cost information set in advance according to the communication area or transmission time.
 また、コスト情報において、通信コストは、例えば、端末400が通信可能な通信エリアと当該通信エリアでの送信時間との組み合わせに関連付けられてもよい。なお、コスト情報において、通信エリア及び送信時間の何れか一方と、通信コストとが関連付けられていてもよい。また、コスト情報は、コアNWノード200において生成されてもよく、ITSサーバ100において生成されてもよい。ITSサーバ100にてコスト情報を生成する際、ITSサーバ100は、コスト情報の生成に必要なパラメータ(端末400の位置情報、課金情報など)をコアNWノード200から取得する。 In the cost information, the communication cost may be associated with, for example, a combination of a communication area in which the terminal 400 can communicate and a transmission time in the communication area. In the cost information, any one of the communication area and the transmission time may be associated with the communication cost. The cost information may be generated in the core NW node 200 or may be generated in the ITS server 100. When generating cost information in the ITS server 100, the ITS server 100 acquires parameters (position information of the terminal 400, charging information, etc.) necessary for generating the cost information from the core NW node 200.
 コアNWノード200は、少なくとも1つの無線アクセスネットワーク(基地局300)を収容する。コアNWノード200は、例えば、基地局300の通信エリア内における端末400の位置を登録する位置登録サーバ201(例えばMME(Mobility Management Entity))と、各端末400の課金を管理する課金サーバ202と、外部システム(例えば、ITSサーバ100)に接続するゲートウェイ(GW)203と、を含む。 The core NW node 200 accommodates at least one radio access network (base station 300). The core NW node 200 includes, for example, a location registration server 201 (for example, MME (Mobility Management Entity)) that registers the location of the terminal 400 within the communication area of the base station 300, and a billing server 202 that manages billing of each terminal 400. A gateway (GW) 203 connected to an external system (for example, the ITS server 100).
 課金サーバ202は、例えば、各端末400の課金を管理する処理に加え、各基地局300の通信エリアにおけるコスト情報を管理する。課金サーバ202は、例えば、位置登録サーバ201に登録される端末400の位置と、当該位置における端末400の課金情報とを関連付けることにより、各通信エリアにおいてどれ位の通信コストにおいて通信が行われているかをコスト情報として管理している。 The billing server 202 manages cost information in the communication area of each base station 300 in addition to processing for managing billing of each terminal 400, for example. For example, the accounting server 202 associates the location of the terminal 400 registered in the location registration server 201 with the accounting information of the terminal 400 at the location, so that communication is performed at what communication cost in each communication area. Is managed as cost information.
 基地局300は、自局がカバーする通信エリア内に存在する端末400、又は、コアNWノード200と接続して通信を行う。また、基地局300は、ITSサーバ100から端末400へのDLデータに対してDLリソースを割り当て、当該DLリソースを用いてDLデータを送信する。 The base station 300 communicates by connecting to the terminal 400 or the core NW node 200 existing in the communication area covered by the own station. In addition, the base station 300 allocates DL resources to DL data from the ITS server 100 to the terminal 400, and transmits DL data using the DL resources.
 端末400は、例えば、車両に搭載され、車両に備えられたセンサにおいて行われるセンシングの結果を示すULデータ(環境情報)を、基地局300及びコアNWノード200を介してITSサーバ100へアップロードする。また、端末400は、ITSサーバ100からのDLデータ(地図情報等のダウンロード情報)を受信する。 The terminal 400, for example, uploads UL data (environment information) indicating the result of sensing performed by a sensor installed in the vehicle to the ITS server 100 via the base station 300 and the core NW node 200. . Further, the terminal 400 receives DL data (download information such as map information) from the ITS server 100.
 なお、端末400は、V2X通信のような低コスト通信、及び、通常のデータ通信等の低コストを要求されない通信(以下、「通常コスト通信」と呼ぶ)の双方をサポートしてもよい。例えば、要求される通信コストに応じて通信(低コスト通信及び通常コスト通信)を分類した「コストクラス」によって各通信を区別してもよい。例えば、コストクラスは、QCI(Quality of Service Class Identifier)に応じて区別されてもよい。 The terminal 400 may support both low-cost communication such as V2X communication and communication that does not require low cost such as normal data communication (hereinafter referred to as “normal cost communication”). For example, each communication may be distinguished by a “cost class” in which communication (low cost communication and normal cost communication) is classified according to a required communication cost. For example, the cost class may be distinguished according to QCI (Quality Service Class Identifier).
 また、例えば、端末400とコアNWノード200との間において、複数の論理的接続(例えば、ベアラ接続又はPDN(Packet Data Network)接続など)を行い、論理的接続毎にコストクラスの区別を行ってもよい。 Further, for example, a plurality of logical connections (for example, bearer connection or PDN (Packet Data Network) connection) are performed between the terminal 400 and the core NW node 200, and cost classes are distinguished for each logical connection. May be.
 また、基地局300では、所定条件(例えば、通信コスト又は通信品質に関する条件)を満たす場合に、上位レイヤ(アプリケーションレイヤ、IP(Internet Protocol)レイヤ等)から下位レイヤ(物理(PHY)レイヤ、MAC(Medium Access Control)レイヤ)へダウンリンクの送信パケットが渡される。そして、基地局300は、下位レイヤにおいて、パケット単位又は論理チャネル単位で低コスト通信と通常コスト通信とを区別し、パケットを送信してもよい。一方、基地局300は、所定条件を満たさない場合には上位レイヤから下位レイヤへダウンリンクの送信パケットを出力しない。この処理により、意図せずに高コストになってしまう通信を回避できる。 In addition, in the base station 300, when a predetermined condition (for example, a condition related to communication cost or communication quality) is satisfied, a lower layer (physical (PHY) layer, MAC, etc.) from an upper layer (application layer, IP (Internet protocol) layer, etc.) Downlink transmission packet is passed to (Medium Access Control) layer. Then, the base station 300 may transmit a packet by distinguishing low-cost communication and normal-cost communication in packet units or logical channel units in the lower layer. On the other hand, the base station 300 does not output a downlink transmission packet from the upper layer to the lower layer when the predetermined condition is not satisfied. By this processing, communication that is unintentionally expensive can be avoided.
 [ITSサーバの構成]
 図2は、本実施の形態に係るITSサーバ100の構成例を示す図である。図2に示すITSサーバ100は、コスト情報取得部101と、端末情報取得部102と、決定部103と、通信部104と、を含む構成を採る。
[Configuration of ITS server]
FIG. 2 is a diagram illustrating a configuration example of the ITS server 100 according to the present embodiment. The ITS server 100 illustrated in FIG. 2 employs a configuration including a cost information acquisition unit 101, a terminal information acquisition unit 102, a determination unit 103, and a communication unit 104.
 コスト情報取得部101は、基地局300の通信エリアの各々における通信コストを示すコスト情報を、コアNWノード200から通信部104を介して取得する。具体的には、コスト情報取得部101は、コアNWノード200に対して、コスト情報を問い合わせるためのシグナリングを通信部104を介して送信する。そして、コスト情報取得部101は、問い合わせにより取得したコスト情報を決定部103へ出力する。 Cost information acquisition unit 101 acquires cost information indicating the communication cost in each communication area of base station 300 from core NW node 200 via communication unit 104. Specifically, the cost information acquisition unit 101 transmits signaling for inquiring cost information to the core NW node 200 via the communication unit 104. Then, the cost information acquisition unit 101 outputs the cost information acquired by the inquiry to the determination unit 103.
 なお、ITSサーバ100は、コスト情報を予め保持してもよい。この場合、ITSサーバ100では、コスト情報をコアNWノード200から取得する処理(つまり、コスト情報取得部101)が不要となる。 Note that the ITS server 100 may hold cost information in advance. In this case, the ITS server 100 does not require processing for acquiring cost information from the core NW node 200 (that is, the cost information acquisition unit 101).
 端末情報取得部102は、端末400の位置を示す位置情報と、端末400における無線品質を示す品質情報とを含む端末情報を、コアNWノード200から通信部104を介して取得する。例えば、端末情報取得部102は、コアNWノード200又は端末400に対して、端末情報を問い合わせるためのシグナリングを通信部104を介して送信して、端末情報を取得してもよく、コアNWノード200又は端末400から所定のタイミング又は周期的に送信される端末情報を取得してもよい。そして、端末情報取得部102は、取得した端末情報を決定部103へ出力する。 The terminal information acquisition unit 102 acquires terminal information including position information indicating the position of the terminal 400 and quality information indicating radio quality in the terminal 400 from the core NW node 200 via the communication unit 104. For example, the terminal information acquisition unit 102 may acquire the terminal information by transmitting signaling for querying the terminal information to the core NW node 200 or the terminal 400 via the communication unit 104. The terminal information transmitted from the terminal 200 or the terminal 400 at a predetermined timing or periodically may be acquired. Then, the terminal information acquisition unit 102 outputs the acquired terminal information to the determination unit 103.
 決定部103は、コスト情報取得部101から入力されるコスト情報、及び、端末情報取得部102から入力される端末情報(位置情報、品質情報)に基づいて、DLデータを受信させる端末400、及び、DLデータの送信先である端末400にDLデータを送信する通信エリア及び送信時間を決定する。 Based on the cost information input from the cost information acquisition unit 101 and the terminal information (position information, quality information) input from the terminal information acquisition unit 102, the determination unit 103 receives the DL data, and The communication area and the transmission time for transmitting DL data to the terminal 400 that is the transmission destination of the DL data are determined.
 例えば、決定部103は、コスト情報に含まれる通信コストのうち、低コストに分類される通信コストの通信エリア及び送信時間(例えば、通信コストが所定の閾値未満の通信エリア及び送信時間)を特定する。そして、決定部103は、低コスト通信可能な通信エリア及び送信時間においてDLデータを受信させる端末400(つまり、下りリンクにおいて低コスト通信が可能な端末400)を決定する。 For example, the determination unit 103 identifies the communication area and the transmission time of the communication cost classified as low among the communication costs included in the cost information (for example, the communication area and the transmission time whose communication cost is less than a predetermined threshold). To do. Then, the determination unit 103 determines a terminal 400 that receives DL data in a communication area and transmission time in which low-cost communication is possible (that is, a terminal 400 that can perform low-cost communication in the downlink).
 また、決定部103は、低コスト通信が可能な端末400について、品質情報に示される無線品質が閾値以上であるか否か(無線品質が良好であるか否か)を判定する。そして、決定部103は、無線品質が良好であり、低コスト通信が可能な端末400を、DLデータの送信先の端末として決定する。 Also, the determination unit 103 determines whether or not the wireless quality indicated in the quality information is equal to or higher than a threshold (whether or not the wireless quality is good) for the terminal 400 capable of low-cost communication. Then, the determination unit 103 determines a terminal 400 having good radio quality and capable of low-cost communication as a DL data transmission destination terminal.
 決定部103は、DLデータの送信先として決定した端末400に対するDLデータの送信指示を通信部104に出力する。 The determining unit 103 outputs a DL data transmission instruction to the communication unit 104 for the terminal 400 determined as the DL data transmission destination.
 通信部104は、決定部103から出力される、送信指示に従って、DLデータを対象の端末400へ送信する。 The communication unit 104 transmits DL data to the target terminal 400 in accordance with a transmission instruction output from the determination unit 103.
 なお、ここでは、ITSサーバ100は、通信コストが低い通信エリア及び送信時間について、低コスト通信が可能な端末400を決定する場合について説明した。しかし、本発明では、この処理に限定されず、例えば、ITSサーバ100は、通信エリア又は送信時間の何れか一方について、低コスト通信が可能な端末400を決定してもよい。例えば、ITSサーバ100は、低コスト通信が可能な送信時間を有する基地局300を特定し、特定した基地局300において当該送信時間での通信が可能な端末400を決定してもよい。 In addition, here, the case where the ITS server 100 determines the terminal 400 capable of low-cost communication for the communication area and transmission time with low communication cost has been described. However, the present invention is not limited to this processing, and for example, the ITS server 100 may determine the terminal 400 capable of low-cost communication for either one of the communication area and the transmission time. For example, the ITS server 100 may specify the base station 300 having a transmission time capable of low-cost communication, and determine the terminal 400 capable of communication at the transmission time in the specified base station 300.
 [端末の構成]
 図3は、本実施の形態に係る端末400の構成例を示す図である。図3に示す端末400は、位置情報生成部401と、無線品質測定部402と、通信部403と、を含む構成を採る。
[Terminal configuration]
FIG. 3 is a diagram illustrating a configuration example of the terminal 400 according to the present embodiment. A terminal 400 illustrated in FIG. 3 employs a configuration including a position information generation unit 401, a radio quality measurement unit 402, and a communication unit 403.
 位置情報生成部401は、自機の位置を示す位置情報を生成する。例えば、位置情報生成部401は、GPS(Global Positioning System)等によって自機の位置を測位し、測位結果を示す位置情報を生成してもよい。又は、位置情報生成部401は、自機が存在する在圏エリアを示す情報(例えば、セルID、TA(Tracking Area)、TA list等)を位置情報としてもよい。又は、位置情報生成部401は、端末400が搭載された車両のカーナビゲーションシステムから、車両の走行位置(又は走行予定位置)を示す情報を取得して、位置情報としてもよい。位置情報生成部401は、位置情報を通信部403へ出力する。 The position information generation unit 401 generates position information indicating the position of the own device. For example, the position information generation unit 401 may measure the position of its own device by GPS (Global Positioning System) or the like, and generate position information indicating a positioning result. Alternatively, the position information generating unit 401 may use information indicating the area where the device is located (for example, a cell ID, TA (Tracking Area), TA area list, etc.) as the position information. Alternatively, the position information generation unit 401 may acquire information indicating the travel position (or planned travel position) of the vehicle from the car navigation system of the vehicle on which the terminal 400 is mounted, and use the information as the position information. The position information generation unit 401 outputs the position information to the communication unit 403.
 無線品質測定部402は、自機と自機が接続する基地局300との間の無線品質を測定する。無線品質の一例として、例えば、受信電力、RSSI(Received Signal Strength Indicator)、RSRP(Reference Signal Received Power)、SINR(Signal to Interference and Noise Ratio)、RSRQ(Reference Signal Received Quality)等が挙げられる。無線品質測定部402は、測定した無線品質を示す品質情報を通信部403へ出力する。 The wireless quality measuring unit 402 measures the wireless quality between the own device and the base station 300 to which the own device is connected. Examples of radio quality include received power, RSSI (Received Signal Strength Indicator), RSRP (Reference Signal Received Power), SINR (Signal Signal Interference and Noise Ratio), RSRQ (Reference Signal Received Quality), and the like. The radio quality measuring unit 402 outputs quality information indicating the measured radio quality to the communication unit 403.
 通信部403は、位置情報生成部401から入力される位置情報、無線品質測定部402から入力される品質情報、又は、ULデータを基地局300へ送信する。また、通信部403は、ITSサーバ100から送信されるDLデータを、基地局300を介して受信する。 The communication unit 403 transmits the position information input from the position information generation unit 401, the quality information input from the wireless quality measurement unit 402, or UL data to the base station 300. In addition, the communication unit 403 receives DL data transmitted from the ITS server 100 via the base station 300.
 [通信システムの動作例]
 次に、上述した通信システムの各装置が行う通信制御について詳細に説明する。
[Operation example of communication system]
Next, communication control performed by each device of the communication system described above will be described in detail.
 以下では、(i)ITSサーバ100が行うコスト情報及び端末情報の取得方法、(ii)ITSサーバ100が行うDLデータの送信制御方法、及び、(iii)ITSサーバ100が用いるコスト情報における、端末400の位置と通信コストとの関係について詳細に説明する。 In the following, the terminal in (i) the cost information and terminal information acquisition method performed by the ITS server 100, (ii) the DL data transmission control method performed by the ITS server 100, and (iii) the cost information used by the ITS server 100 The relationship between 400 positions and communication costs will be described in detail.
 [(i)コスト情報及び端末情報の取得方法]
 まず、ITSサーバ100が行うコスト情報及び端末情報の取得方法について説明する。
[(I) Acquisition method of cost information and terminal information]
First, a cost information and terminal information acquisition method performed by the ITS server 100 will be described.
 図4は、ITSサーバ100がコスト情報を取得する際の通信システムの動作例を示す図である。 FIG. 4 is a diagram illustrating an operation example of the communication system when the ITS server 100 acquires cost information.
 図4において、ST101では、ITSサーバ100が、コアNWノード200(例えば、課金サーバ202)に対してコスト情報を問い合わせるシグナリングを送信する。 4, in ST101, the ITS server 100 transmits signaling for inquiring cost information to the core NW node 200 (for example, the billing server 202).
 ST102では、コアNWノード200は、ITSサーバ100からコスト情報を問い合わせるシグナリングを受信すると、保持しているコスト情報をITSサーバ100へ送信する。 In ST102, when the core NW node 200 receives signaling for inquiring cost information from the ITS server 100, the core NW node 200 transmits the held cost information to the ITS server 100.
 このように、図4では、ST102におけるコスト情報の取得は、ITSサーバ100からの問い合わせに基づいて実施される。 As described above, in FIG. 4, acquisition of cost information in ST102 is performed based on an inquiry from the ITS server 100.
 なお、ITSサーバ100は、各通信エリア及び送信時間に応じたコスト情報を予め保持していてもよい。この場合、図4に示す処理は不要となる。 In addition, the ITS server 100 may hold | maintain beforehand the cost information according to each communication area and transmission time. In this case, the process shown in FIG. 4 is unnecessary.
 次に、図5は、ITSサーバ100が端末情報を取得する際の通信システムの動作例を示す図である。 Next, FIG. 5 is a diagram illustrating an operation example of the communication system when the ITS server 100 acquires terminal information.
 図5において、ST201では、端末400は、端末400の位置を示す位置情報(例えば、在圏エリア又は測位結果)をコアNWノード200へ報告する。ST202では、端末400は、端末400における無線品質を示す品質情報をコアNWノード200へ報告する。 In FIG. 5, in ST 201, terminal 400 reports position information (for example, a location area or a positioning result) indicating the position of terminal 400 to core NW node 200. In ST202, terminal 400 reports quality information indicating the radio quality in terminal 400 to core NW node 200.
 ST203では、コアNWノード200は、ST201及びST202で報告された、端末400の位置情報及び品質情報を含む端末情報をITSサーバ100へ送信する。 In ST203, core NW node 200 transmits terminal information including location information and quality information of terminal 400 reported in ST201 and ST202 to ITS server 100.
 端末400は、例えば、ITSサーバ100から位置情報又は品質情報を問い合わせるシグナリングを受信した場合に、ST201及びST202において位置情報及び品質情報をコアNWノード200へ報告してもよい。または、端末400は、ITSサーバ100の動作とは独立して、所定のタイミング又は周期的に、ST201及びST202において位置情報及び品質情報をコアNWノード200へ報告してもよい。 The terminal 400 may report the position information and the quality information to the core NW node 200 in ST201 and ST202, for example, when receiving the signaling for inquiring the position information or the quality information from the ITS server 100. Alternatively, terminal 400 may report position information and quality information to core NW node 200 in ST201 and ST202 at a predetermined timing or periodically, independently of the operation of ITS server 100.
 また、例えば、複数の端末400のうち、低コストが要求される端末400(コスト低減対象の端末400)は、コスト低減対象ではない端末400と比較して、位置情報(例えば在圏エリア)又は品質情報を狭域又は高頻度でコアNWノード200へ報告してもよい。コスト低減対象の端末400が位置情報又は品質情報を狭域で報告することにより、ITSサーバ100は、端末400のより正確な位置情報又は品質情報を取得できる。また、コスト低減対象の端末400が位置情報又は品質情報を高頻度で報告することにより、ITSサーバ100は、当該端末400の現在の状況を反映した位置情報又は品質情報を取得でき、DLデータの送信制御の精度を向上できる。 Further, for example, among the plurality of terminals 400, the terminal 400 that is required to be low in cost (the terminal 400 that is the target of cost reduction) is compared with the terminal 400 that is not the target of cost reduction, for example, the positional information (for example, the area within the area) The quality information may be reported to the core NW node 200 in a narrow area or with high frequency. When the cost reduction target terminal 400 reports position information or quality information in a narrow area, the ITS server 100 can acquire more accurate position information or quality information of the terminal 400. In addition, when the cost reduction target terminal 400 reports the position information or the quality information at a high frequency, the ITS server 100 can acquire the position information or the quality information reflecting the current state of the terminal 400, and the DL data The accuracy of transmission control can be improved.
 また、例えば、コアNWノード200は、位置登録サーバ201において端末400の位置情報が登録される度に端末情報をITSサーバ100へ送信してもよく、低コスト通信の対象となる端末400の端末情報を周期的にITSサーバ100へ送信してもよい。 Further, for example, the core NW node 200 may transmit the terminal information to the ITS server 100 each time the position information of the terminal 400 is registered in the position registration server 201, and the terminal of the terminal 400 that is a target of low-cost communication. Information may be periodically transmitted to the ITS server 100.
 なお、図4に示すコスト情報の取得動作(ST101,ST102)と、図5に示す端末情報の取得動作(ST201~ST203)との時系列の順序は特に限定されない。ITSサーバ100は、端末情報、コスト情報の順に問い合わせてもよく、コスト情報及び端末情報の双方を同時に問い合わせてもよい。 Note that the time-series order of the cost information acquisition operation (ST101, ST102) shown in FIG. 4 and the terminal information acquisition operation (ST201 to ST203) shown in FIG. 5 is not particularly limited. The ITS server 100 may inquire in the order of terminal information and cost information, or may inquire both cost information and terminal information at the same time.
 [(ii)DLデータの送信制御方法]
 次に、ITSサーバ100における、端末400に対するDLデータの送信制御方法について説明する。
[(Ii) DL data transmission control method]
Next, a DL data transmission control method for terminal 400 in ITS server 100 will be described.
 ITSサーバ100からDLデータを送信する時、端末400は、基地局300と接続(アクセス)している状態(Connected状態)である場合と、基地局300と接続していない状態(Idle状態)である場合とが想定される。 When transmitting DL data from the ITS server 100, the terminal 400 is in a state of being connected (accessed) to the base station 300 (Connected state) and in a state of not being connected to the base station 300 (Idle state). It is assumed that there is a certain case.
 以下では、端末400の各接続状態における動作についてそれぞれ説明する。 Hereinafter, the operation of each connection state of the terminal 400 will be described.
 <端末400がConnected状態の場合>
 まず、端末400がConnected状態の場合について説明する。
<When terminal 400 is in a connected state>
First, a case where the terminal 400 is in the connected state will be described.
 図6A及び図6Bは、端末400がConnected状態の場合におけるDLデータの送信制御例を示す図である。 6A and 6B are diagrams illustrating an example of DL data transmission control when the terminal 400 is in the Connected state.
 図6A及び図6Bにおいて、ST301では、ITSサーバ100は、図4又は図5に示すようにして取得したコスト情報及び端末情報(位置情報、品質情報)に基づいて、低コスト通信が可能な通信エリアにおいてDLデータの送信先となる端末400が存在するか否かを判定する(位置判定)。または、コスト情報において、通信コストが通信エリア及び当該通信エリアでの送信時間の組み合わせに関連付けられている場合、ITSサーバ100は、低コスト通信が可能な通信エリア及び送信時間の組み合わせにおいて、DLデータの送信先となる端末400が存在するか否かを判定してもよい。 6A and 6B, in ST301, the ITS server 100 can perform low-cost communication based on cost information and terminal information (position information and quality information) acquired as shown in FIG. 4 or FIG. It is determined whether there is a terminal 400 serving as a DL data transmission destination in the area (position determination). Alternatively, in the cost information, when the communication cost is associated with the combination of the communication area and the transmission time in the communication area, the ITS server 100 determines whether the DL data is in the combination of the communication area and the transmission time capable of low-cost communication. It may be determined whether or not there is a terminal 400 serving as a transmission destination.
 また、ITSサーバ100は、品質情報に基づいて、端末400の無線品質が良好であるか否かを判定する(品質判定)。 Further, the ITS server 100 determines whether or not the wireless quality of the terminal 400 is good based on the quality information (quality determination).
 判定の結果、図6Aに示すように、低コスト通信が可能な端末400が存在する場合(判定結果:YES)、ITSサーバ100は、ST302において、当該端末400に対して、低コスト通信が可能な通信エリア又は送信時間においてDLデータを送信する。 As a result of the determination, as shown in FIG. 6A, when there is a terminal 400 capable of low-cost communication (determination result: YES), the ITS server 100 can perform low-cost communication to the terminal 400 in ST302. DL data is transmitted in a proper communication area or transmission time.
 一方、図6Bに示すように、低コスト通信が可能な端末400が存在しない場合(判定結果:NO)、ITSサーバ100は、DLデータの送信処理を行わない。例えば、ITSサーバ100は、DLデータを一定期間保持する(送信待機する)。なお、ITSサーバ100は、DLデータを保持している間(送信待機中)に、端末400が低コスト通信可能と判定された場合、図6Aと同様にしてDLデータを送信すればよい。 On the other hand, as shown in FIG. 6B, when there is no terminal 400 capable of low-cost communication (determination result: NO), the ITS server 100 does not perform DL data transmission processing. For example, the ITS server 100 holds DL data for a certain period (waits for transmission). Note that the ITS server 100 may transmit the DL data in the same manner as in FIG. 6A when it is determined that the terminal 400 is capable of low-cost communication while holding the DL data (waiting for transmission).
 端末400は、DLデータを保持してから一定期間経過した場合(例えばタイマ満了時)、又は、DLデータを破棄すると判断した場合、DLデータ(パケット)を破棄する(ST303)。 The terminal 400 discards the DL data (packet) when a certain period of time has elapsed after holding the DL data (for example, when the timer expires) or when it is determined to discard the DL data (ST303).
 このようにして、ITSサーバ100は、コスト情報、端末400の位置情報及び品質情報に基づいて、低コスト通信が可能な通信エリア又は送信時間(通信コストが閾値未満である通信エリア又は送信時間)においてDLデータの送信先となる端末400を決定する。この処理により、端末400は、低コスト、かつ、良好な無線品質でDLデータを受信できる。 In this manner, the ITS server 100 can perform communication at a low cost based on the cost information, the position information of the terminal 400, and the quality information, or the transmission time (communication area or transmission time where the communication cost is less than the threshold). The terminal 400 which becomes the transmission destination of DL data is determined. By this processing, the terminal 400 can receive DL data with low cost and good radio quality.
 また、ITSサーバ100は、例えば、端末400が将来的に移動する位置を予測し、端末400の移動先の位置に基づいて、低コスト通信が可能な通信エリアにおいてDLデータの送信先となる端末400を決定してもよい。例えば、ITSサーバ100は、端末400が搭載された車両のカーナビゲーションシステムにおける走行計画を位置情報として用いて端末400の将来の位置を予測してもよい。ITSサーバ100は、低コスト通信が可能な通信エリアにおいてDLデータの送信先となる端末400が存在する場合には、当該端末400に対してDLデータの受信機会を確保(予約)してもよい。この処理により、ITSサーバ100は、端末400の現在位置のみでなく、将来的に移動する位置を用いて、低コスト通信を使用したDLデータの送信制御をより柔軟に行うことができる。 In addition, the ITS server 100 predicts a position where the terminal 400 will move in the future, for example, and a terminal that is a transmission destination of DL data in a communication area where low-cost communication is possible based on the position of the destination of the terminal 400 400 may be determined. For example, the ITS server 100 may predict the future position of the terminal 400 using the travel plan in the car navigation system of the vehicle on which the terminal 400 is mounted as the position information. If there is a terminal 400 that is a DL data transmission destination in a communication area where low-cost communication is possible, the ITS server 100 may secure (reserve) a DL data reception opportunity for the terminal 400. . With this process, the ITS server 100 can more flexibly perform DL data transmission control using low-cost communication using not only the current position of the terminal 400 but also a position where the terminal 400 will move in the future.
 このように、ITSサーバ100は、低コスト通信が可能な通信エリアに存在する端末400に対してのみDLデータを送信でき、各端末400での通信コストの低減を図ることができる。 As described above, the ITS server 100 can transmit DL data only to the terminal 400 that exists in the communication area where low-cost communication is possible, and the communication cost of each terminal 400 can be reduced.
 <端末400がIdle状態の場合>
 次に、端末400がIdle状態の場合について説明する。
<When the terminal 400 is in the idle state>
Next, the case where the terminal 400 is in the idle state will be described.
 端末400がIdle状態の場合、端末400は、Connected状態に遷移してDLデータを受信する。Idle状態からConnected状態へ遷移する条件として、ダウンリンク(DL:Downlink)の受信処理がトリガとなる場合がある。 When the terminal 400 is in the idle state, the terminal 400 transitions to the connected state and receives DL data. As a condition for transition from the Idle state to the Connected state, a downlink (DL) reception process may be a trigger.
 DL受信トリガによりConnected状態へ遷移する条件として、以下の方法が挙げられる。以下の条件に従って、端末400はIdle状態からConnected状態へ遷移する。 The following method can be cited as a condition for transitioning to the Connected state by a DL reception trigger. The terminal 400 transitions from the Idle state to the Connected state according to the following conditions.
 具体的には、複数の基地局300のうち、Pagingを送信する基地局(以下、Paging送信基地局と呼ぶ)が、端末400の位置登録エリアに加え、通信コストに基づいて選択される。具体的には、端末400に接続可能な基地局300の中から、低い通信コスト(例えば、最小の通信コスト)のエリアを有する基地局300が選択される。 Specifically, among the plurality of base stations 300, a base station that transmits Paging (hereinafter referred to as a Paging transmission base station) is selected based on the communication cost in addition to the location registration area of the terminal 400. Specifically, the base station 300 having an area with a low communication cost (for example, the minimum communication cost) is selected from the base stations 300 that can be connected to the terminal 400.
 そして、Paging送信基地局は、Pagingを端末400へ送信する。端末400は、Pagingの受信をトリガとして、Idle状態からConnected状態へ遷移する。 Then, the Paging transmission base station transmits the Paging to the terminal 400. The terminal 400 transitions from the Idle state to the Connected state with the reception of Paging as a trigger.
 ここで、Paging送信基地局としてPagingを端末400へ送信する基地局300を決定する方法は、例えば、以下の方法(1)、(2)が挙げられる。 Here, examples of the method for determining the base station 300 that transmits Paging to the terminal 400 as the Paging transmission base station include the following methods (1) and (2).
 (1):コアNWノード200が行う決定方法
 図7は、決定方法(1)におけるPaging送信基地局を決定する方法を示す図である。
(1): Determination Method Performed by Core NW Node 200 FIG. 7 is a diagram illustrating a method for determining a Paging transmission base station in the determination method (1).
 図7において、ST401では、ITSサーバ100は、コアNWノード200に対して上位レイヤ(例えばIPレイヤ)のパケットを送信する。このパケットのヘッダには、複数の基地局300における通信コストに関するコスト情報が含まれる。 7, in ST401, the ITS server 100 transmits an upper layer (for example, IP layer) packet to the core NW node 200. The header of this packet includes cost information regarding communication costs in the plurality of base stations 300.
 ST402では、コアNWノード200は、ITSサーバ100からのパケットヘッダを確認して、端末400に接続可能な複数の基地局300のコスト情報(例えば、コストクラス)を特定する。 In ST402, the core NW node 200 confirms the packet header from the ITS server 100 and identifies cost information (for example, cost class) of a plurality of base stations 300 connectable to the terminal 400.
 ST403では、コアNWノード200は、コスト情報に基づいて、複数の基地局300の中からPaging送信基地局を選択する。例えば、コアNWノード200は、コストクラスが所定の条件を満たす(通信コストが所定の閾値未満である)基地局300をPaging送信基地局として選択してもよい。 In ST403, the core NW node 200 selects a Paging transmission base station from the plurality of base stations 300 based on the cost information. For example, the core NW node 200 may select a base station 300 whose cost class satisfies a predetermined condition (communication cost is less than a predetermined threshold) as a Paging transmission base station.
 ST404では、コアNWノード200は、Paging送信基地局として選択した基地局300に対して、端末400へのPagingの送信を指示する。 In ST404, the core NW node 200 instructs the base station 300 selected as the paging transmission base station to transmit paging to the terminal 400.
 ST405では、Paging送信指示を受け取った基地局300(Paging送信基地局)は、端末400に対してPagingを送信する。端末400は、Pagingを受け取ると、Idle状態からConnected状態へ遷移する。 In ST405, base station 300 (Paging transmission base station) that has received the Paging transmission instruction transmits Paging to terminal 400. When receiving the Paging, the terminal 400 transitions from the Idle state to the Connected state.
 (2):基地局300が行う決定方法
 図8は、決定方法(2)におけるPaging送信基地局を決定する方法を示す図である。
(2): Determination Method Performed by Base Station 300 FIG. 8 is a diagram illustrating a method for determining a Paging transmission base station in the determination method (2).
 図8において、ST501では、ITSサーバ100は、コアNWノード200に対してパケットを送信する。 8, in ST501, the ITS server 100 transmits a packet to the core NW node 200.
 ST502では、コアNWノード200は、例えば、ITSサーバ100から受け取ったパケットの送信先の端末400の位置登録エリアに基づいて、複数の基地局300の中からPaging送信基地局(候補)を選択する。 In ST502, core NW node 200 selects a Paging transmission base station (candidate) from among a plurality of base stations 300 based on, for example, the location registration area of transmission destination terminal 400 of the packet received from ITS server 100. .
 ST503では、コアNWノード200は、Paging送信基地局として選択した基地局300に対して、端末400へのPagingの送信を指示する。 In ST503, the core NW node 200 instructs the base station 300 selected as the paging transmission base station to transmit paging to the terminal 400.
 ST504では、Paging送信指示を受け取った基地局300は、例えば、論理的接続(例えば、ベアラ又はPDN接続)毎のコストクラス又はQCI(QoS Class Identifier)等に基づいて、Pagingを端末400へ送信するか否かを判定する。例えば、基地局300は、自局のコストクラスが所定の条件を満たす(通信コストが所定の閾値未満である)場合にPagingを端末400へ送信すると判定してもよい。 In ST504, base station 300 that has received the Paging transmission instruction transmits Paging to terminal 400 based on, for example, the cost class for each logical connection (for example, bearer or PDN connection) or QCI (QoS Class Identifier). It is determined whether or not. For example, the base station 300 may determine to transmit the paging to the terminal 400 when its own cost class satisfies a predetermined condition (communication cost is less than a predetermined threshold).
 Pagingを送信すると判定した場合(ST504:YES)、ST505では、基地局300は、端末400に対してPagingを送信する。端末400は、Pagingを受け取ると、Idle状態からConnected状態へ遷移する。 If it is determined to transmit Paging (ST504: YES), in ST505, base station 300 transmits Paging to terminal 400. When receiving the Paging, the terminal 400 transitions from the Idle state to the Connected state.
 一方、Pagingを送信しないと判定した場合(ST504:NO)、ST506では、基地局300は、コアNWノード200に対して、Paging送信基地局(候補)の再選択を要求する。コアNWノード200は、Paging送信基地局の再選択要求を受け取ると、例えば、ST502と同様にしてPaging送信基地局を再選択する。 On the other hand, when it is determined not to transmit Paging (ST504: NO), in ST506, base station 300 requests core NW node 200 to reselect a Paging transmission base station (candidate). When receiving the reselection request for the Paging transmission base station, the core NW node 200 reselects the Paging transmission base station, for example, in the same manner as ST502.
 以上、DL受信トリガによりConnected状態へ遷移する条件について説明した。 So far, the conditions for transitioning to the Connected state by the DL reception trigger have been described.
 このように、DL受信トリガにおいて、コアNWノード200又は基地局300は、コストクラスに基づいてPaging送信基地局を選択する。この処理により、端末400は、Connected状態へ遷移した後、通信コストが低いエリアを有する基地局300を介して、DLデータを低コストでITSサーバ100から受信できる。 Thus, in the DL reception trigger, the core NW node 200 or the base station 300 selects the Paging transmission base station based on the cost class. By this process, the terminal 400 can receive DL data from the ITS server 100 at low cost through the base station 300 having an area with low communication cost after transitioning to the Connected state.
 なお、上記決定方法(1)及び(2)を組み合わせてもよい。 In addition, you may combine the said determination methods (1) and (2).
 [(iii)端末400の位置と通信コストとの関係について]
 次に、ITSサーバ100が用いるコスト情報における通信コストと、端末400の位置との関係について説明する。
[(Iii) Relationship between position of terminal 400 and communication cost]
Next, the relationship between the communication cost in the cost information used by the ITS server 100 and the position of the terminal 400 will be described.
 具体的には、コアNWノード200内の課金サーバ202は、端末400が通信を行った位置(通信エリア)と、当該位置での端末400の通信コスト(通信料金など)とを関連付ける。また、課金サーバ202は、さらに、端末400が通信を行った時間と、当該時間での端末400の通信コストとを関連付けてもよい。 Specifically, the billing server 202 in the core NW node 200 associates the position (communication area) where the terminal 400 communicates with the communication cost (communication charge, etc.) of the terminal 400 at the position. Further, billing server 202 may further associate the time when terminal 400 communicates with the communication cost of terminal 400 at that time.
 例えば、課金サーバ202は、端末400の位置情報を以下の方法により取得する。 For example, the accounting server 202 acquires the location information of the terminal 400 by the following method.
 (1)端末位置登録の利用
 位置登録サーバ201は、端末400の位置登録エリアを課金サーバ202へ通知する。例えば、位置登録サーバ201は、端末400の位置登録エリアが更新されるタイミング又は定期的に位置登録エリアを課金サーバ202へ通知してもよい。
(1) Use of Terminal Location Registration The location registration server 201 notifies the billing server 202 of the location registration area of the terminal 400. For example, the location registration server 201 may notify the billing server 202 of the location registration area when the location registration area of the terminal 400 is updated or periodically.
 (2)測位情報の利用
 課金サーバ202は、端末400が測位した端末400の位置、又は、測位サーバ(図示せず)が測位した端末400の位置を取得する。例えば、課金サーバ202は、端末400の位置が更新されるタイミング又は定期的に、端末400又は測位サーバから端末400の位置情報を取得してもよい。
(2) Use of Positioning Information The charging server 202 acquires the position of the terminal 400 measured by the terminal 400 or the position of the terminal 400 measured by a positioning server (not shown). For example, the billing server 202 may acquire the position information of the terminal 400 from the terminal 400 or the positioning server at the timing when the position of the terminal 400 is updated or periodically.
 これらの処理により、課金サーバ202は、端末400がDLデータの通信に要した通信コストを、端末400がDLデータを受信した位置(つまり、基地局300の通信エリア)又は端末400がDLデータを受信した時間と関連付けて、コスト情報として管理できる。ITSサーバ100は、課金サーバ202からコスト情報を取得することにより、各基地局300における低コスト通信が可能なエリア及び低コスト通信が可能な時間を特定できる。例えば、課金サーバ202は、端末400の位置が変更した場合、又は、端末400が通信を行い課金された場合に、コスト情報として管理する通信コスト、通信エリア(端末400の位置)、通信時間を更新することにより、コスト情報の精度を向上できる。 Through these processes, the billing server 202 determines the communication cost required for the DL data communication by the terminal 400, the location where the terminal 400 receives the DL data (that is, the communication area of the base station 300), or the terminal 400 receives the DL data. It can be managed as cost information in association with the received time. The ITS server 100 acquires the cost information from the billing server 202, thereby identifying the area where each base station 300 can perform low-cost communication and the time during which low-cost communication is possible. For example, when the location of the terminal 400 is changed or when the terminal 400 communicates and is charged, the billing server 202 sets the communication cost, communication area (position of the terminal 400), and communication time managed as cost information. By updating, the accuracy of cost information can be improved.
 なお、課金サーバ202は、端末400がDLデータを受信した位置と、通信コストとを関連付ける際、実際に要した通信コストそのものを関連付ける場合に限定されない。例えば、課金サーバ202は、端末400の移動経路の予測位置を、端末400が通信を行う位置として報告されるとする。この場合、当該端末400が実際に通信を行った位置と予測位置とが異なる場合、課金サーバ202は、実際の通信コストに所定値(ペナルティ)を加算した値を当該予測位置と関連付けてもよい。この処理により、この予測位置と関連付けられた通信コストが実際の通信コストよりも高くなるので、当該予測位置の信頼度が低くなり、ITSサーバ100では、当該予測位置について低コスト通信が可能なエリアと判定されにくくなる。 Note that the charging server 202 is not limited to the case of associating the actual communication cost itself when associating the communication cost with the location where the terminal 400 received the DL data. For example, the accounting server 202 reports the predicted position of the movement route of the terminal 400 as a position where the terminal 400 communicates. In this case, when the position where the terminal 400 actually communicates is different from the predicted position, the charging server 202 may associate a value obtained by adding a predetermined value (penalty) to the actual communication cost with the predicted position. . As a result of this processing, the communication cost associated with the predicted position becomes higher than the actual communication cost, so the reliability of the predicted position is lowered, and the ITS server 100 is an area where low-cost communication is possible for the predicted position. It becomes difficult to be judged.
 [実施の形態の効果]
 このように、ITSサーバ100は、少なくとも1つの端末400が通信可能な通信エリアにおける通信コスト、及び、端末400の位置に基づいて、低コスト通信が可能である通信エリア又は時間(通信コストが閾値未満である通信エリア又は時間)においてDLデータを受信させる端末400(DLデータの送信先)を決定し、決定した端末400に対して低コスト通信が可能な通信エリア又は時間においてDLデータを送信する。この処理により、各端末400は、通信コストがより低い通信エリア又は時間においてDLデータを受信できる。
[Effect of the embodiment]
As described above, the ITS server 100 can perform communication at low cost based on the communication cost in the communication area in which at least one terminal 400 can communicate and the position of the terminal 400 (communication cost is a threshold value). Terminal 400 (DL data transmission destination) that receives DL data is determined in the communication area or time), and DL data is transmitted to the determined terminal 400 in a communication area or time in which low-cost communication is possible. . By this processing, each terminal 400 can receive DL data in a communication area or time with a lower communication cost.
 よって、本実施の形態によれば、V2X通信において、端末400へのDLデータの通信をより低コストで行うことができる。 Therefore, according to the present embodiment, it is possible to perform DL data communication to the terminal 400 at lower cost in V2X communication.
 以上、本発明の一実施の形態について説明した。 The embodiment of the present invention has been described above.
(ハードウェア構成)
 なお、上記実施の形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及び/又はソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
(Hardware configuration)
In addition, the block diagram used for description of the said embodiment has shown the block of the functional unit. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
 例えば、本発明の一実施の形態におけるサーバ装置、コアNWノード内の各装置、基地局(無線基地局)、及び、端末(ユーザ端末)などは、本発明の通信方法の処理を行うコンピュータとして機能してもよい。図9は、本発明の一実施の形態に係るサーバ装置、コアNWノード内の各装置、基地局、及び、端末のハードウェア構成の一例を示す図である。上述のサーバ装置100、コアNWノード200、基地局300及び端末400は、物理的には、プロセッサ1001、メモリ1002、ストレージ1003、通信装置1004、入力装置1005、出力装置1006、バス1007などを含むコンピュータ装置として構成されてもよい。 For example, the server device, each device in the core NW node, the base station (wireless base station), and the terminal (user terminal) according to the embodiment of the present invention are used as computers that perform the processing of the communication method of the present invention. May function. FIG. 9 is a diagram illustrating an example of a hardware configuration of the server device, each device in the core NW node, the base station, and the terminal according to the embodiment of the present invention. The server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 described above physically include a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and the like. It may be configured as a computer device.
 なお、以下の説明では、「装置」という文言は、回路、デバイス、ユニットなどに読み替えることができる。サーバ装置100、コアNWノード200、基地局300及び端末400のハードウェア構成は、図に示した各装置を1つ又は複数含むように構成されてもよいし、一部の装置を含まずに構成されてもよい。 In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the server device 100, the core NW node 200, the base station 300, and the terminal 400 may be configured to include one or more of the devices illustrated in the figure, or may not include some devices. It may be configured.
 サーバ装置100、コアNWノード200、基地局300及び端末400における各機能は、プロセッサ1001、メモリ1002などのハードウェア上に所定のソフトウェア(プログラム)を読み込ませることで、プロセッサ1001が演算を行い、通信装置1004による通信、又は、メモリ1002及びストレージ1003におけるデータの読み出し及び/又は書き込みを制御することで実現される。 Each function in the server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 is performed by causing the processor 1001 to perform calculation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002. This is realized by controlling communication by the communication device 1004 or reading and / or writing of data in the memory 1002 and the storage 1003.
 プロセッサ1001は、例えば、オペレーティングシステムを動作させてコンピュータ全体を制御する。プロセッサ1001は、周辺装置とのインターフェース、制御装置、演算装置、レジスタなどを含む中央処理装置(CPU:Central Processing Unit)で構成されてもよい。例えば、上述のコスト情報取得部101、端末情報取得部102、決定部103、位置情報生成部401、無線品質測定部402などは、プロセッサ1001で実現されてもよい。 The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the cost information acquisition unit 101, the terminal information acquisition unit 102, the determination unit 103, the position information generation unit 401, the wireless quality measurement unit 402, and the like described above may be realized by the processor 1001.
 また、プロセッサ1001は、プログラム(プログラムコード)、ソフトウェアモジュール又はデータを、ストレージ1003及び/又は通信装置1004からメモリ1002に読み出し、これらに従って各種の処理を実行する。プログラムとしては、上述の実施の形態で説明した動作の少なくとも一部をコンピュータに実行させるプログラムが用いられる。例えば、サーバ装置100の決定部103は、メモリ1002に格納され、プロセッサ1001で動作する制御プログラムによって実現されてもよく、他の機能ブロックについても同様に実現されてもよい。上述の各種処理は、1つのプロセッサ1001で実行される旨を説明してきたが、2以上のプロセッサ1001により同時又は逐次に実行されてもよい。プロセッサ1001は、1以上のチップで実装されてもよい。なお、プログラムは、電気通信回線を介してネットワークから送信されても良い。 Further, the processor 1001 reads a program (program code), software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the determination unit 103 of the server device 100 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks. Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
 メモリ1002は、コンピュータ読み取り可能な記録媒体であり、例えば、ROM(Read Only Memory)、EPROM(Erasable Programmable ROM)、EEPROM(Electrically Erasable Programmable ROM)、RAM(Random Access Memory)などの少なくとも1つで構成されてもよい。メモリ1002は、レジスタ、キャッシュ、メインメモリ(主記憶装置)などと呼ばれてもよい。メモリ1002は、本発明の一実施の形態に係る無線通信方法を実施するために実行可能なプログラム(プログラムコード)、ソフトウェアモジュールなどを保存することができる。 The memory 1002 is a computer-readable recording medium, and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.
 ストレージ1003は、コンピュータ読み取り可能な記録媒体であり、例えば、CD-ROM(Compact Disc ROM)などの光ディスク、ハードディスクドライブ、フレキシブルディスク、光磁気ディスク(例えば、コンパクトディスク、デジタル多用途ディスク、Blu-ray(登録商標)ディスク)、スマートカード、フラッシュメモリ(例えば、カード、スティック、キードライブ)、フロッピー(登録商標)ディスク、磁気ストリップなどの少なくとも1つで構成されてもよい。ストレージ1003は、補助記憶装置と呼ばれてもよい。上述の記憶媒体は、例えば、メモリ1002及び/又はストレージ1003を含むデータベース、サーバその他の適切な媒体であってもよい。 The storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.
 通信装置1004は、有線及び/又は無線ネットワークを介してコンピュータ間の通信を行うためのハードウェア(送受信デバイス)であり、例えばネットワークデバイス、ネットワークコントローラ、ネットワークカード、通信モジュールなどともいう。例えば、上述の通信部104,403などは、通信装置1004で実現されてもよい。 The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, the above-described communication units 104 and 403 may be realized by the communication device 1004.
 入力装置1005は、外部からの入力を受け付ける入力デバイス(例えば、キーボード、マウス、マイクロフォン、スイッチ、ボタン、センサなど)である。出力装置1006は、外部への出力を実施する出力デバイス(例えば、ディスプレイ、スピーカー、LEDランプなど)である。なお、入力装置1005及び出力装置1006は、一体となった構成(例えば、タッチパネル)であってもよい。 The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
 また、プロセッサ1001及びメモリ1002などの各装置は、情報を通信するためのバス1007で接続される。バス1007は、単一のバスで構成されてもよいし、装置間で異なるバスで構成されてもよい。 Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
 また、サーバ装置100、コアNWノード200、基地局300及び端末400は、マイクロプロセッサ、デジタル信号プロセッサ(DSP:Digital Signal Processor)、ASIC(Application Specific Integrated Circuit)、PLD(Programmable Logic Device)、FPGA(Field Programmable Gate Array)などのハードウェアを含んで構成されてもよく、当該ハードウェアにより、各機能ブロックの一部又は全てが実現されてもよい。例えば、プロセッサ1001は、これらのハードウェアの少なくとも1つで実装されてもよい。 The server apparatus 100, the core NW node 200, the base station 300, and the terminal 400 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and an FPGA (FPGA). Hardware (Field Programmable Gate Array) may be included, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.
(情報の通知、シグナリング)
 また、情報の通知は、本明細書で説明した態様/実施形態に限られず、他の方法で行われてもよい。例えば、情報の通知は、物理レイヤシグナリング(例えば、DCI(Downlink Control Information)、UCI(Uplink Control Information))、上位レイヤシグナリング(例えば、RRC(Radio Resource Control)シグナリング、MAC(Medium Access Control)シグナリング、報知情報(MIB(Master Information Block)、SIB(System Information Block)))、その他の信号又はこれらの組み合わせによって実施されてもよい。また、RRCシグナリングは、RRCメッセージと呼ばれてもよく、例えば、RRC接続セットアップ(RRC Connection Setup)メッセージ、RRC接続再構成(RRC Connection Reconfiguration)メッセージなどであってもよい。
(Information notification, signaling)
The notification of information is not limited to the aspect / embodiment described in the present specification, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
(適用システム)
 本明細書で説明した各態様/実施形態は、LTE(Long Term Evolution)、LTE-A(LTE-Advanced)、SUPER 3G、IMT-Advanced、4G、5G、5G+(5G plus)、FRA(Future Radio Access)、W-CDMA(登録商標)、GSM(登録商標)、CDMA2000、UMB(Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi)、IEEE 802.16(WiMAX)、IEEE 802.20、UWB(Ultra-WideBand)、Bluetooth(登録商標)、その他の適切なシステムを利用するシステム及び/又はこれらに基づいて拡張された次世代システムに適用されてもよい。
(Applicable system)
Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, 5G + (5G plus), FRA (Future Radio). Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and / or next-generation systems extended based on them may be applied.
(処理手順等)
 本明細書で説明した各態様/実施形態の処理手順、シーケンス、フローチャートなどは、矛盾の無い限り、順序を入れ替えてもよい。例えば、本明細書で説明した方法については、例示的な順序で様々なステップの要素を提示しており、提示した特定の順序に限定されない。
(Processing procedure etc.)
As long as there is no contradiction, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.
(基地局の動作)
 本明細書において基地局によって行われるとした特定動作は、場合によってはその上位ノード(upper node)によって行われることもある。基地局を有する1つまたは複数のネットワークノード(network nodes)からなるネットワークにおいて、端末との通信のために行われる様々な動作は、基地局および/または基地局以外の他のネットワークノード(例えば、MME(Mobility Management Entity)またはS-GW(Serving Gateway)などが考えられるが、これらに限られない)によって行われ得ることは明らかである。上記において基地局以外の他のネットワークノードが1つである場合を例示したが、複数の他のネットワークノードの組み合わせ(例えば、MMEおよびS-GW)であってもよい。
(Operation of base station)
The specific operation assumed to be performed by the base station in this specification may be performed by its upper node in some cases. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., It is obvious that this can be performed by MME (Mobility Management Entity) or S-GW (Serving Gateway). In the above, the case where there is one network node other than the base station is illustrated, but a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.
(入出力の方向)
 情報及び信号等は、上位レイヤ(または下位レイヤ)から下位レイヤ(または上位レイヤ)へ出力され得る。複数のネットワークノードを介して入出力されてもよい。
(I / O direction)
Information, signals, and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
(入出力された情報等の扱い)
 入出力された情報等は特定の場所(例えば、メモリ)に保存されてもよいし、管理テーブルで管理してもよい。入出力される情報等は、上書き、更新、または追記され得る。出力された情報等は削除されてもよい。入力された情報等は他の装置へ送信されてもよい。
(Handling of input / output information, etc.)
Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
(判定方法)
 判定は、1ビットで表される値(0か1か)によって行われてもよいし、真偽値(Boolean:trueまたはfalse)によって行われてもよいし、数値の比較(例えば、所定の値との比較)によって行われてもよい。
(Judgment method)
The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
(ソフトウェア)
 ソフトウェアは、ソフトウェア、ファームウェア、ミドルウェア、マイクロコード、ハードウェア記述言語と呼ばれるか、他の名称で呼ばれるかを問わず、命令、命令セット、コード、コードセグメント、プログラムコード、プログラム、サブプログラム、ソフトウェアモジュール、アプリケーション、ソフトウェアアプリケーション、ソフトウェアパッケージ、ルーチン、サブルーチン、オブジェクト、実行可能ファイル、実行スレッド、手順、機能などを意味するよう広く解釈されるべきである。
(software)
Software, whether it is called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be interpreted broadly.
 また、ソフトウェア、命令などは、伝送媒体を介して送受信されてもよい。例えば、ソフトウェアが、同軸ケーブル、光ファイバケーブル、ツイストペア及びデジタル加入者回線(DSL)などの有線技術及び/又は赤外線、無線及びマイクロ波などの無線技術を使用してウェブサイト、サーバ、又は他のリモートソースから送信される場合、これらの有線技術及び/又は無線技術は、伝送媒体の定義内に含まれる。 Further, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.
(情報、信号)
 本明細書で説明した情報、信号などは、様々な異なる技術のいずれかを使用して表されてもよい。例えば、上記の説明全体に渡って言及され得るデータ、命令、コマンド、情報、信号、ビット、シンボル、チップなどは、電圧、電流、電磁波、磁界若しくは磁性粒子、光場若しくは光子、又はこれらの任意の組み合わせによって表されてもよい。
(Information, signal)
Information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
 なお、本明細書で説明した用語及び/又は本明細書の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及び/又はシンボルは信号(シグナル)であってもよい。また、信号はメッセージであってもよい。また、コンポーネントキャリア(CC)は、キャリア周波数、セルなどと呼ばれてもよい。 Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, the channel and / or symbol may be a signal. The signal may be a message. Further, the component carrier (CC) may be called a carrier frequency, a cell, or the like.
(システム、ネットワーク)
 本明細書で使用する「システム」および「ネットワーク」という用語は、互換的に使用される。
(System, network)
As used herein, the terms “system” and “network” are used interchangeably.
(パラメータ、チャネルの名称)
 また、本明細書で説明した情報、パラメータなどは、絶対値で表されてもよいし、所定の値からの相対値で表されてもよいし、対応する別の情報で表されてもよい。例えば、無線リソースはインデックスで指示されるものであってもよい。
(Parameter, channel name)
In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.
 上述したパラメータに使用する名称はいかなる点においても限定的なものではない。さらに、これらのパラメータを使用する数式等は、本明細書で明示的に開示したものと異なる場合もある。様々なチャネル(例えば、PUCCH、PDCCHなど)及び情報要素(例えば、TPCなど)は、あらゆる好適な名称によって識別できるので、これらの様々なチャネル及び情報要素に割り当てている様々な名称は、いかなる点においても限定的なものではない。 The names used for the above parameters are not limited in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.
(基地局)
 基地局は、1つまたは複数(例えば、3つ)の(セクタとも呼ばれる)セルを収容することができる。基地局が複数のセルを収容する場合、基地局のカバレッジエリア全体は複数のより小さいエリアに区分でき、各々のより小さいエリアは、基地局サブシステム(例えば、屋内用の小型基地局RRH:Remote Radio Head)によって通信サービスを提供することもできる。「セル」または「セクタ」という用語は、このカバレッジにおいて通信サービスを行う基地局、および/または基地局サブシステムのカバレッジエリアの一部または全体を指す。さらに、「基地局」、「eNB」、「セル」、および「セクタ」という用語は、本明細書では互換的に使用され得る。基地局は、固定局(fixed station)、NodeB、eNodeB(eNB)、アクセスポイント(access point)、フェムトセル、スモールセルなどの用語で呼ばれる場合もある。
(base station)
A base station may accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services. The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.
(端末)
 端末は、当業者によって、移動局、加入者局、モバイルユニット、加入者ユニット、ワイヤレスユニット、リモートユニット、モバイルデバイス、ワイヤレスデバイス、ワイヤレス通信デバイス、リモートデバイス、モバイル加入者局、アクセス端末、モバイル端末、ワイヤレス端末、リモート端末、ハンドセット、ユーザエージェント、モバイルクライアント、クライアント、UE(User Equipment)、またはいくつかの他の適切な用語で呼ばれる場合もある。
(Terminal)
The terminal is a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal by those skilled in the art , Wireless terminal, remote terminal, handset, user agent, mobile client, client, UE (User Equipment), or some other appropriate terminology.
(用語の意味、解釈)
 本明細書で使用する「判断(determining)」、「決定(determining)」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定(judging)、計算(calculating)、算出(computing)、処理(processing)、導出(deriving)、調査(investigating)、探索(looking up)(例えば、テーブル、データベースまたは別のデータ構造での探索)、確認(ascertaining)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信(receiving)(例えば、情報を受信すること)、送信(transmitting)(例えば、情報を送信すること)、入力(input)、出力(output)、アクセス(accessing)(例えば、メモリ中のデータにアクセスすること)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決(resolving)、選択(selecting)、選定(choosing)、確立(establishing)、比較(comparing)などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。
(Meaning and interpretation of terms)
As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like. In addition, “determination” and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as "determined" or "determined". In addition, “determination” and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
 「接続された(connected)」、「結合された(coupled)」という用語、又はこれらのあらゆる変形は、2又はそれ以上の要素間の直接的又は間接的なあらゆる接続又は結合を意味し、互いに「接続」又は「結合」された2つの要素間に1又はそれ以上の中間要素が存在することを含むことができる。要素間の結合又は接続は、物理的なものであっても、論理的なものであっても、或いはこれらの組み合わせであってもよい。本明細書で使用する場合、2つの要素は、1又はそれ以上の電線、ケーブル及び/又はプリント電気接続を使用することにより、並びにいくつかの非限定的かつ非包括的な例として、無線周波数領域、マイクロ波領域及び光(可視及び不可視の両方)領域の波長を有する電磁エネルギーなどの電磁エネルギーを使用することにより、互いに「接続」又は「結合」されると考えることができる。 The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples By using electromagnetic energy, such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
 本明細書で使用する「に基づいて」という記載は、別段に明記されていない限り、「のみに基づいて」を意味しない。言い換えれば、「に基づいて」という記載は、「のみに基づいて」と「に少なくとも基づいて」の両方を意味する。 As used herein, the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
 本明細書で使用する「第1の」、「第2の」などの呼称を使用した要素へのいかなる参照も、それらの要素の量または順序を全般的に限定するものではない。これらの呼称は、2つ以上の要素間を区別する便利な方法として本明細書で使用され得る。したがって、第1および第2の要素への参照は、2つの要素のみがそこで採用され得ること、または何らかの形で第1の要素が第2の要素に先行しなければならないことを意味しない。 Any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.
 上記の各装置の構成における「部」を、「手段」、「回路」、「デバイス」等に置き換えてもよい。 The “unit” in the configuration of each device described above may be replaced with “means”, “circuit”, “device”, and the like.
 「含む(including)」、「含んでいる(comprising)」、およびそれらの変形が、本明細書あるいは特許請求の範囲で使用されている限り、これら用語は、用語「備える」と同様に、包括的であることが意図される。さらに、本明細書あるいは特許請求の範囲において使用されている用語「または(or)」は、排他的論理和ではないことが意図される。 As long as “including”, “comprising”, and variations thereof are used in the specification or claims, these terms are inclusive of the term “comprising”. Intended to be Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR.
 本開示の全体において、例えば、英語でのa, an, 及びtheのように、翻訳により冠詞が追加された場合、これらの冠詞は、文脈から明らかにそうではないことが示されていなければ、複数のものを含むものとする。 Throughout this disclosure, if articles are added by translation, for example, a, an, and the in English, these articles must be clearly not otherwise indicated by context, Including multiple things.
(態様のバリエーション等)
 本明細書で説明した各態様/実施形態は単独で用いてもよいし、組み合わせて用いてもよいし、実行に伴って切り替えて用いてもよい。また、所定の情報の通知(例えば、「Xであること」の通知)は、明示的に行うものに限られず、暗黙的(例えば、当該所定の情報の通知を行わない)ことによって行われてもよい。
(Aspect variations, etc.)
Each aspect / embodiment described in this specification may be used independently, may be used in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
 以上、本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.
 本特許出願は2016年11月1日に出願した日本国特許出願第2016-214488号に基づきその優先権を主張するものであり、日本国特許出願第2016-214488号の全内容を本願に援用する。 This patent application claims priority based on Japanese Patent Application No. 2016-214488 filed on November 1, 2016, the entire contents of Japanese Patent Application No. 2016-214488 are incorporated herein by reference. To do.
 本発明の一態様は、移動通信システムに有用である。 One embodiment of the present invention is useful for a mobile communication system.
 100 ITSサーバ
 101 コスト情報取得部
 102 端末情報取得部
 103 決定部
 104,403 通信部
 200 コアNWノード
 201 位置登録サーバ
 202 課金サーバ
 203 GW
 300 基地局
 400 端末
 401 位置情報生成部
 402 無線品質測定部
DESCRIPTION OF SYMBOLS 100 ITS server 101 Cost information acquisition part 102 Terminal information acquisition part 103 Determination part 104,403 Communication part 200 Core NW node 201 Location registration server 202 Charging server 203 GW
300 base station 400 terminal 401 position information generating unit 402 wireless quality measuring unit

Claims (5)

  1.  少なくとも1つの端末が通信可能な通信エリアにおける通信コスト、及び、前記少なくとも1つの端末の位置に基づいて、前記通信コストが第1の閾値未満である第1の通信エリアにおいてダウンリンクデータを受信させる第1の端末を決定する決定部と、
     前記第1の端末に対して前記第1の通信エリアにおいてダウンリンクデータを送信する通信部と、
     を具備するサーバ装置。
    Based on a communication cost in a communication area in which at least one terminal can communicate and a position of the at least one terminal, downlink data is received in the first communication area in which the communication cost is less than a first threshold. A determination unit for determining a first terminal;
    A communication unit for transmitting downlink data in the first communication area to the first terminal;
    A server device comprising:
  2.  前記決定部は、さらに、前記第1の端末における無線品質が第2の閾値以上であるか否かを判定し、
     前記通信部は、前記無線品質が前記第2の閾値以上である場合に、前記第1の端末に対してダウンリンクデータを送信する、
     請求項1に記載のサーバ装置。
    The determination unit further determines whether or not the radio quality in the first terminal is equal to or higher than a second threshold,
    The communication unit transmits downlink data to the first terminal when the wireless quality is equal to or higher than the second threshold;
    The server device according to claim 1.
  3.  前記通信コストは、前記通信エリア及び当該通信エリアでの送信時間の組み合わせに関連付けられ、
     前記決定部は、前記通信コストが前記第1の閾値未満である第1の組み合わせにおける通信エリア及び送信時間においてダウンリンクデータを受信させる前記第1の端末を決定し、
     前記通信部は、前記第1の端末に対して、前記第1の組み合わせにおける通信エリア及び送信時間においてダウンリンクデータを送信する、
     請求項1に記載のサーバ装置。
    The communication cost is associated with a combination of the communication area and a transmission time in the communication area,
    The determining unit determines the first terminal that receives downlink data in a communication area and transmission time in a first combination in which the communication cost is less than the first threshold,
    The communication unit transmits downlink data to the first terminal in a communication area and a transmission time in the first combination.
    The server device according to claim 1.
  4.  前記決定部は、前記少なくとも1つの端末の移動先の位置を予測し、前記予測された移動先の位置に基づいて、前記第1の端末を決定する、
     請求項1に記載のサーバ装置。
    The determining unit predicts a position of a destination of the at least one terminal, and determines the first terminal based on the predicted position of the destination;
    The server device according to claim 1.
  5.  少なくとも1つの端末が通信可能な通信エリアにおける通信コスト、及び、前記少なくとも1つの端末の位置に基づいて、前記通信コストが閾値未満である第1の通信エリアにおいてダウンリンクデータを受信させる第1の端末を決定し、
     前記第1の端末に対して前記第1の通信エリアにおいてダウンリンクデータを送信する、
     通信方法。
    Based on a communication cost in a communication area in which at least one terminal can communicate, and a position of the at least one terminal, a first data for receiving downlink data in a first communication area in which the communication cost is less than a threshold value Determine the device,
    Transmitting downlink data in the first communication area to the first terminal;
    Communication method.
PCT/JP2017/039537 2016-11-01 2017-11-01 Server device and communication method WO2018084178A1 (en)

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