WO2024009385A1 - Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage - Google Patents

Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage Download PDF

Info

Publication number
WO2024009385A1
WO2024009385A1 PCT/JP2022/026696 JP2022026696W WO2024009385A1 WO 2024009385 A1 WO2024009385 A1 WO 2024009385A1 JP 2022026696 W JP2022026696 W JP 2022026696W WO 2024009385 A1 WO2024009385 A1 WO 2024009385A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
relay
information
coverage
wireless communication
Prior art date
Application number
PCT/JP2022/026696
Other languages
English (en)
Japanese (ja)
Inventor
裕貴 井浦
学 酒井
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2023502871A priority Critical patent/JP7357818B1/ja
Priority to PCT/JP2022/026696 priority patent/WO2024009385A1/fr
Publication of WO2024009385A1 publication Critical patent/WO2024009385A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present disclosure relates to a relay route control device, a wireless communication terminal, a communication system, a communication route determination method, a control circuit, and a storage medium that control a relay route of wireless communication.
  • wireless communication terminals within the coverage of the base station (hereinafter referred to as in-coverage terminals) ) becomes a relay device that wirelessly relays data communications from wireless communication terminals that cannot directly communicate with the base station because they are outside the coverage of the base station (hereinafter referred to as out-of-coverage terminals). It is widely known that the coverage of the entire communication system can be expanded.
  • in-coverage terminals that can act as relay devices, it is necessary to determine the in-coverage terminal that will operate as a relay device that relays data communications of out-of-coverage terminals.
  • Non-Patent Document 1 describes that an in-coverage terminal to be used as a relay device is determined by an instruction from a server in a wired core network to which a base station is connected.
  • Non-Patent Document 1 describes a method of notifying a base station of a relay device determined within a wired core network, but does not describe a method of determining a relay device.
  • relay stations are determined so that a relay route with good communication quality is formed.
  • the communication quality changes when the positional relationship between the wireless stations that make up the system changes, so it is desirable to be able to flexibly change the relay route in response to changes in communication quality.
  • the present disclosure has been made in view of the above, and aims to provide a relay route control device that can appropriately select a relay device that forms a relay route for wireless communication.
  • a relay route control device uses location information of an out-of-coverage terminal, which is a wireless communication terminal located outside the coverage of a base station, and a location management unit that manages location information of a relay-enabled terminal, which is a wireless communication terminal located in the area and has a relay function of transferring signals received from other wireless communication terminals, and attribute information and operation status information of the relay-enabled terminal. and a network management unit that manages the network management unit.
  • the relay route control device determines which relays to connect to when an out-of-coverage terminal communicates with a base station, based on location information managed by the location management unit and attribute information and operation status information managed by the network management unit. It includes a relay route determining unit that determines possible terminals.
  • a relay route control device that can appropriately select a relay device that forms a relay route for wireless communication.
  • Sequence diagram showing an example of operations of an out-of-coverage terminal, a relay device, and a server device according to an embodiment A diagram illustrating an example of attribute information and operational status information that a relay device transmits to a server device.
  • FIG. 1 is a diagram showing a configuration example of a communication system 100 according to an embodiment.
  • Communication system 100 includes out-of-coverage terminal 1, relay device 2, base station 3, and server device 5 that operates as a relay route control device according to the embodiment.
  • Base station 3 and server device 5 are connected to wired core network 4 .
  • Communication system 100 transmits information from out-of-coverage terminal 1, which is a wireless communication terminal outside coverage 200 of base station 3 connected to wired core network 4, to relay device 2 and base station within coverage 200 of base station 3.
  • This is a coverage extension system in wireless communication that transmits data to a wired core network 4 via a wired core network 4.
  • the coverage 200 is an area in which a wireless communication terminal can correctly receive a wireless signal from the base station 3 connected to the wired core network 4. Wireless communication terminals outside the coverage 200 cannot directly communicate with the base station 3. On the other hand, a wireless communication terminal within the coverage 200 of the base station 3 can directly communicate with the base station 3. In addition, some wireless communication terminals receive information once from other wireless communication terminals when they are within the coverage 200, that is, when direct communication with the base station 3 is possible. For example, there are wireless devices that have a relay function to transfer data to the base station 3. In the communication system 100, among the wireless communication terminals within the coverage 200, a relay capable terminal that is a wireless communication terminal having a relay function is referred to as a relay device 2. Note that in FIG. 1, description of wireless communication terminals that do not have a relay function within the coverage 200 is omitted. Further, in FIG. 1, there is one relay device 2, but there may be two or more relay devices. Further, a base station other than the base station 3 may exist.
  • a wireless communication terminal that is outside the coverage 200 of the base station 3 and communicates with the wired core network 4 via the relay device 2 and the base station 3 is an out-of-coverage terminal 1.
  • the out-of-coverage terminal 1 may be a wireless communication terminal configured to be able to operate as a relay device 2 when it moves and is located within the coverage 200, that is, has the above-mentioned relay function.
  • the wireless communication terminal may have a configuration that does not have the above-mentioned relay function.
  • the relay device 2 In order to enable the out-of-coverage terminal 1 to discover the relay device 2, the relay device 2 periodically transmits a known signal called a discovery signal. By detecting this discovery signal, the out-of-coverage terminal 1 recognizes that it is located within a range where communication with the relay device 2 is possible, and establishes a wireless connection to the relay device 2.
  • the relay device 2 can receive information transmitted from the out-of-coverage terminal 1 and transfer this information to the base station 3. This allows the out-of-coverage terminal 1 to indirectly connect to the base station 3 and the wired core network 4 via the relay device 2, thereby expanding the coverage.
  • the server device 5 which operates as a relay route control device, obtains from the out-of-coverage terminal 1 or the relay device 2 a list of relay devices to which the out-of-coverage terminal 1 can connect, received power level information of the out-of-coverage terminal 1, and out-of-coverage terminals. 1, received power level information of relay device 2, location information of relay device 2, attribute information of relay device 2, operational status information of relay device 2, past communication quality history, etc.
  • a relay device 2 to which the out-of-coverage terminal 1 connects is determined from among a plurality of relay devices 2.
  • the communication quality used as a decision criterion may be not only instantaneous transmission speed but also stable end-to-end jitter or transmission delay time in the future.
  • the received power level information of the out-of-coverage terminal 1 is information indicating the received power level of the signal that the out-of-coverage terminal 1 receives from the relay device 2, and this is referred to as first received power level information.
  • the received power level information of the relay device 2 is information indicating the received power level of the signal that the relay device 2 receives from the base station 3, and this is referred to as second received power level information.
  • the server device 5 does not need to be a separate device, and may be a program installed in a device constituting the wired core network 4.
  • FIG. 2 is a diagram showing a configuration example of the out-of-coverage terminal 1, the relay device 2, and the server device 5 according to the embodiment.
  • the out-of-coverage terminal 1 includes a communication control section 11, a received power measurement section 12, and a position measurement section 13.
  • the communication control unit 11 connects to the server device 5 via the relay device 2, base station 3, and wired core network 4, and performs wireless communication for receiving instruction information and transmitting acquisition information.
  • Connection methods in the wireless section include LTE (Long Term Evolution) according to the 3GPP communication standard, 5G, and Wi-Fi (registered trademark) connection using wireless LAN (Local Area Network).
  • the received power measurement unit 12 detects a discovery signal, which is a known signal that is periodically transmitted for the out-of-coverage terminal 1 to discover the relay device 2 or the base station 3, and detects the discovery signal received from the relay device 2 or the base station 3. Measure the received power level of the discovery signal.
  • a discovery signal which is a known signal that is periodically transmitted for the out-of-coverage terminal 1 to discover the relay device 2 or the base station 3, and detects the discovery signal received from the relay device 2 or the base station 3. Measure the received power level of the discovery signal.
  • the position measurement unit 13 measures the position of its own terminal (outside coverage terminal 1). Any method may be used to measure the position.
  • the position measurement unit 13 may calculate the position of the own terminal based on a reference signal from a satellite positioning system such as GPS (Global Positioning System), or may calculate the position of the own terminal based on base station position information acquired from surrounding base stations.
  • the position of the own terminal may be calculated based on sensor information from an acceleration sensor or a gyro sensor. The position may be calculated using other methods.
  • the relay device 2 includes a communication control section 21, a received power measurement section 22, a position measurement section 23, and a device information management section 24.
  • the relay device 2 is a wireless communication terminal from the perspective of the base station 3, and has the same functions as the out-of-coverage terminal 1, and has a data relay function in addition to the functions that the out-of-coverage terminal 1 has. .
  • the communication control unit 21 is a processing unit similar to the communication control unit 11 of the out-of-coverage terminal 1, and is connected to the server device 5 via the base station 3 and the wired core network 4, and receives instruction information and transmits acquired information. Perform wireless communication for.
  • the communication control unit 21 uses the received power level calculated by the received power measurement unit 22 and the position information of the relay device 2 calculated by the position measurement unit 23 via the base station 3 and the wired core network 4. and transmits the operational state information and attribute information managed by the device information management unit 24 to the server device 5, and receives instruction information from the server device 5, and the received instruction information is directed to the out-of-coverage terminal 1. If so, the instruction information is transferred to the out-of-coverage terminal 1.
  • the communication control unit 21 wirelessly connects with the out-of-coverage terminal 1 and transfers the received signal from the out-of-coverage terminal 1 to the server device 5 via the base station 3 and the wired core network 4.
  • the received power measurement unit 22 is a processing unit similar to the received power measurement unit 12 of the out-of-coverage terminal 1, and receives a discovery signal, which is a known signal that is periodically transmitted in order for the relay device 2 to discover the base station 3. and measures the received power level of the discovery signal received from the base station 3.
  • a discovery signal which is a known signal that is periodically transmitted in order for the relay device 2 to discover the base station 3. and measures the received power level of the discovery signal received from the base station 3.
  • the position measuring unit 23 is a processing unit similar to the position measuring unit 13 of the out-of-coverage terminal 1, and measures the position of its own device (relay device 2).
  • the device information management unit 24 determines the attributes of the relay device 2 itself, such as whether the relay device 2 is a mobile wireless communication terminal, whether it is a relay-only device, transmittable power level, compatible bandwidth, etc. information, and operational status information of the relay device 2 such as current moving speed, communication busy state, short-term attribute changes, etc.
  • the relay device 2 includes not only a wireless communication terminal fixedly placed at a specific location, but also a device capable of autonomous driving, which moves by itself according to the positions of surrounding wireless communication terminals and communication request status. It may be possible. Furthermore, when the relay device 2 is attached to an automatic traveling robot, it may move autonomously for purposes other than communication.
  • the relay device 2 may not only be a relay-only device, but also a general wireless communication terminal that has a relay function. In this case, communication may be busy based on the communication request of the relay device 2 itself, and data transfer from other wireless communication terminals may not be relayed with the required communication quality.
  • the number of wireless communication terminals connected to relay device 2 may be not only one but multiple. There may also be cases where data transfer from the external terminal 1 cannot be relayed with the required communication quality. In this way, the communication busy state of the relay device 2 may affect communication quality. Furthermore, if the device is not a relay-only device, the hardware capability may not satisfy the transmission power level, compatible bandwidth, etc. required of the relay device 2.
  • the relay device 2 when the relay device 2 is not a relay-only device, even if the instantaneous received signal power at the out-of-coverage terminal 1 due to the discovery signal is high, the relay device 2 Therefore, there is a high possibility that the transmission delay time of data transfer will increase.
  • the transmission power level may be lower than that of a relay-only device, the coverage area of the relay device 2 may be smaller, and the relay route may need to be switched frequently. Therefore, the switching work becomes an overhead, and there is a possibility that a temporary increase in the transmission delay time of data transfer by the relay device 2 occurs.
  • the relay device 2 is not a relay-only device, the corresponding bandwidth is narrower than that of a relay-only device, and there is a high possibility that a communication busy state will occur based on the communication request of the relay device 2 itself.
  • the device information management unit 24 determines the relay device type indicating whether the relay device 2 is a relay-only device or a shared relay device (a wireless communication terminal that can also operate as a relay device), and the relay device 2 is moved. Attribute information of the relay device 2 itself, such as information indicating whether movement is possible, transmittable power level of the relay device 2, compatible bandwidth of the relay device 2, moving speed, communication busy state, short-term The operational state information of the relay device 2, such as changes in attributes, is managed.
  • the server device 5 includes a communication control section 51, a relay route determination section 52, a location management section 53, and a network management section 54.
  • the location management unit 53 and the network management unit 54 are functions provided inside the server device 5. It may be installed outside of 5. Further, the server device 5 may also be implemented in an electronic computer, which is a general-purpose computer, as a function realized by a program, rather than as a unique hardware.
  • the communication control unit 51 connects to the out-of-coverage terminal 1 via the wired core network 4, base station 3, and relay device 2, or connects to the relay device 2 via the wired core network 4 and base station 3, and issues instructions. Performs wireless communication for transmitting information and receiving acquired information.
  • the communication control unit 51 receives the received signal power and position information acquired at the out-of-coverage terminal 1 and the relay device 2 via the base station 3 and the wired core network 4. Further, the communication control unit 51 receives operational status information and attribute information of the relay device 2 via the base station 3 and the wired core network 4. Further, the communication control unit 51 transmits an instruction to the out-of-coverage terminal 1 and an instruction to the relay device 2 via the wired core network 4 and the base station 3.
  • the location management unit 53 stores the location information received from the out-of-coverage terminal 1 and the relay device 2 in an internal memory, and stores the location information of all wireless communication terminals including the out-of-coverage terminal 1 and the relay device 2 belonging to the communication system 100. to manage.
  • the network management unit 54 stores the operational state information and attribute information of the relay device 2 received from the relay device 2 in an internal memory, and manages the operational state information and attribute information of all the relay devices 2 belonging to the communication system 100.
  • the relay route determining unit 52 uses the position information managed by the position management unit 53, that is, the position information of the wireless communication terminal and the position information of the relay device 2, and the operational state information and attributes of the relay device 2 managed by the network management unit 54. Based on this information, the relay device 2 suitable for the connection destination of the out-of-coverage terminal 1 is calculated, and if it is preferable for the out-of-coverage terminal 1 to change the connection destination relay device 2, the relay device 2 for the corresponding out-of-coverage terminal 1 is calculated. A relay switching instruction signal is generated. This relay switching instruction signal is transmitted to the corresponding out-of-coverage terminal 1 via the communication control unit 51.
  • FIG. 3 is a diagram showing an example of hardware that implements the out-of-coverage terminal 1 and relay device 2 according to the embodiment.
  • the out-of-coverage terminal 1 and the relay device 2 are realized by, for example, a processor 91, a memory 92, a wireless communication module 93, and a positioning module 94 shown in FIG.
  • the processor 91 is a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, also referred to as DSP (Digital Signal Processor)), system LSI (Large Scale Integration), or the like.
  • Memory 92 is RAM (Random Access Memory), ROM (Read Only Memory), EPROM (EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark). Sable Programmable Read Only Memory).
  • the communication control unit 11 and reception power measurement unit 12 of the out-of-coverage terminal 1 and the communication control unit 21, reception power measurement unit 22, and device information management unit 24 of the relay device 2 are realized by the processor 91 and the memory 92. That is, in the case of the out-of-coverage terminal 1, a program for operating as the communication control section 11 and the received power measurement section 12 is stored in the memory 92, and the processor 91 reads and executes this program. 1 communication control section 11 and received power measurement section 12 are realized. Similarly, in the case of the relay device 2, a program for operating as the communication control unit 21, received power measurement unit 22, and device information management unit 24 is stored in the memory 92, and the processor 91 reads and executes this program. As a result, the communication control unit 21, received power measurement unit 22, and device information management unit 24 of the relay device 2 are realized.
  • the above program stored in the memory 92 may be provided to the user etc. in a state written in a storage medium such as a CD (Compact Disc)-ROM or a DVD (Digital Versatile Disc)-ROM.
  • a storage medium such as a CD (Compact Disc)-ROM or a DVD (Digital Versatile Disc)-ROM.
  • the information may be provided via a network.
  • FIG. 3 is an example of hardware for realizing the out-of-coverage terminal 1 and the relay device 2 using a general-purpose processor 91 and memory 92
  • a dedicated processing circuit is used instead of the processor 91 and memory 92 to realize the out-of-coverage terminal 1 and relay device 2 may be realized. That is, the communication control section 11 and the received power measurement section 12 of the out-of-coverage terminal 1 may be realized by a dedicated processing circuit, or the communication control section 21, the received power measurement section 22, and the device information management section 24 of the relay device 2 may be implemented. may be realized.
  • the dedicated processing circuit is a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a circuit that is a combination of these.
  • the position measuring unit 13 of the out-of-coverage terminal 1 and the position measuring unit 23 of the relay device 2 are realized by a positioning module 94.
  • FIG. 4 is a diagram showing an example of hardware that implements the server device 5 according to the embodiment.
  • the server device 5 is realized by, for example, a processor 96, a memory 97, and a communication module 98 shown in FIG.
  • the processor 91 is a CPU, a system LSI, or the like.
  • the memory 97 is a RAM, ROM, EPROM, EEPROM, or the like.
  • the communication control unit 51, relay route determination unit 52, location management unit 53, and network management unit 54 of the server device 5 are realized by a processor 96 and a memory 97. That is, a program for operating as the communication control unit 51, relay route determination unit 52, location management unit 53, and network management unit 54 of the server device 5 is stored in the memory 97, and the processor 96 reads and executes this program. By doing so, the communication control unit 51, relay route determination unit 52, location management unit 53, and network management unit 54 of the server device 5 are realized.
  • the above-mentioned program stored in the memory 97 may be provided to the user in a state written on a storage medium such as a CD-ROM or DVD-ROM, or may be provided to the user via a network. It may be in the form in which it is provided.
  • the processor 96, memory 97, and communication module 98 shown in FIG. 4 may be hardware that constitutes an electronic computer. That is, the server device 5 may be realized by a computer and a program executed by the computer. Each function of the server device 5 may be realized by a plurality of computers working together.
  • FIG. 5 is a sequence diagram showing an example of the operations of the out-of-coverage terminal 1, the relay device 2, and the server device 5 according to the embodiment. Note that in FIG. 5, the description of the base station 3 is omitted.
  • the out-of-coverage terminal 1 corresponding to the target terminal first connects to the server device 5 in steps S11 to S13 shown in FIG. Send us the information you need.
  • the out-of-coverage terminal 1 uses the communicable relay device list 300, which is a list of identification information of all the relay devices 2 that can recognize that the out-of-coverage terminal 1 is located within the communicable range of the relay device 2 through the discovery signal. is created and transmitted to the server device 5 via the relay device 2 to which the out-of-coverage terminal 1 is connected (step S11).
  • the out-of-coverage terminal 1 transmits received power level information 301, which is information on the received power measured by the received power measurement unit 12, to the server device 5 via the relay device 2 to which the out-of-coverage terminal 1 is connected ( Step S12).
  • the out-of-coverage terminal 1 transmits location information 302, which is information on the location of the own terminal acquired by the location measurement unit 13, to the server device 5 via the relay device 2 to which the out-of-coverage terminal 1 is connected (step S13).
  • relay device 2 Upon receiving the communicable relay device list 300, received power level information 301, and location information 302 transmitted from the out-of-coverage terminal 1, the relay device 2 relays them directly to the server device 5. When relay device 2 receives communicable relay device list 300, received power level information 301, and location information 302 from out-of-coverage terminal 1, it promptly transmits them to server device 5.
  • the communicable relay device list 300, received power level information 301, and location information 302 may be transmitted periodically at predetermined time intervals or at time intervals requested by the server device 5, or the communicable relay device list 300 , the received power level information 301 and the location information 302 may be transmitted irregularly upon occurrence of an updated event. Further, the transmission frequency does not need to be the same among the communicable relay device list 300, the received power level information 301, and the location information 302. Furthermore, there are no restrictions on the transmission order of the communicable relay device list 300, received power level information 301, and position information 302.
  • the relay device 2 transmits information required by the server device 5 in steps S14 to S17.
  • the relay device 2 transmits the received power level information 303, which is information on the received power measured by the received power measurement unit 22, to the server device 5 (step S14), and
  • the location information 304 which is information on the location of, is transmitted to the server device 5 (step S15).
  • the relay device 2 transmits the attribute information 305 and the operational status information 306 created by the device information management unit 24 to the server device 5 (step S16, step S17).
  • the attribute information 305 includes the relay device type, which is information indicating whether the relay device 2 is a dedicated relay device exclusively for relaying or a shared relay device, the movability information, which is information indicating whether the relay device 2 itself is a mobile device, and relay device type. This is information regarding the attributes of the relay device 2 itself, such as the transmittable power level of the device 2 and the compatible bandwidth of the relay device 2. Information other than these may be included in the attribute information 305.
  • the operational status information 306 is information regarding the operational status of the relay device 2, such as moving speed, communication busy status information, and short-term status changes. Information other than these may be included in the operational state information 306.
  • the received power level information 303, location information 304, attribute information 305, and operation state information 306 may be transmitted periodically at predetermined time intervals or at time intervals requested by the server device 5, or the received power level information 303, location information 304, attribute information 305, and operational status information 306 may be transmitted irregularly upon occurrence of an updated event. Further, the transmission frequency does not need to be the same among received power level information 303, location information 304, attribute information 305, and operation state information 306. Furthermore, there are no restrictions on the transmission order of received power level information 303, location information 304, attribute information 305, and operation status information 306.
  • FIG. 6 is a diagram illustrating an example of the attribute information 305 and operation status information 306 that the relay device 2 transmits to the server device 5.
  • the attribute information 305 in the example shown in FIG. 6 includes the relay device type, movability information, transmittable power level, and compatible bandwidth, where the relay device type is shared, the movability information is possible, the transmittable power level is 1 watt, The supported bandwidth is 100MHz. Since the attribute information 305 is information regarding the capabilities of the relay device 2 itself, it may be transmitted only once when the relay device 2 connects to the base station 3, and may be transmitted less frequently than the operation status information 306.
  • the operation status information 306 in the example shown in FIG. 6 includes moving speed, communication busy state information, and relay device status, where the moving speed is 3 km/h, communication busy state information is 50%, and relay device status is in main operation. It is.
  • the communication busy state information indicates the usage rate of the wireless band by the relay device 2. It is assumed that the relay device status is individually defined depending on the applied system or application. Since the operational state information 306 is information that changes dynamically depending on the situation, it needs to be transmitted to the server device 5 periodically while the relay device 2 is in operation or when the operational state is updated.
  • the server device 5 Upon receiving the communicable relay device list 300, received power level information 301, and location information 302 from the out-of-coverage terminal 1 via the relay device 2, the server device 5 relays the communicable relay device list 300 and the received power level information 301.
  • the route determination unit 52 stores the location information 302, and the location information 302 is stored in the location management unit 53.
  • server device 5 upon receiving received power level information 303, location information 304, attribute information 305, and operation status information 306 from relay device 2, stores received power level information 303 in relay route determining unit 52, Location information 304 is stored in location management section 53, and attribute information 305 and operational status information 306 are stored in network management section 54.
  • the various information that the server device 5 receives and stores above includes not only information from the illustrated out-of-coverage terminal 1 and relay device 2, but also information from other out-of-coverage terminals belonging to the communication system 100, which are not shown. This is information from all wireless communication terminals including terminals and relay devices.
  • the server device 5 determines the relay device 2 to which the target terminal, which is the out-of-coverage terminal 1 that is the source of the information, connects (step S18), and selects the relay device 2 determined as the connection destination.
  • a relay switching instruction signal 307 containing information about the device 2 is transmitted to the corresponding out-of-coverage terminal 1 (step S19).
  • step S18 the relay route determining unit 52 determines the relay device 2 to which the out-of-coverage terminal 1 is connected.
  • the relay route determining unit 52 scores the suitability of the out-of-coverage terminal 1 as a relay destination for each relay device 2 listed in the communicable relay device list 300. Below, a method of scoring each relay device 2 will be explained.
  • FIG. 7 is a diagram showing an example of a list of various acquired information related to relay devices #1 to #5 listed in the communicable relay device list 300 transmitted from the out-of-coverage terminal 1.
  • the list shown in FIG. 7 is generated based on location information managed by the location management unit 53 of the server device 5, and operational status information and attribute information managed by the network management unit 54.
  • connection status indicates the relay device 2 to which the out-of-coverage terminal 1 is connected.
  • the out-of-coverage terminal 1 is connected to the base station 3 via the "connected" relay device 2.
  • Relay device type (G1) is information included in the attribute information 305, and indicates whether the relay device 2 in question can be shared with other systems or applications, or can be used exclusively by the system or application without being shared. It can be either ⁇ dedicated'' or ⁇ shared.''
  • “Moveability information (G2)” is information included in the attribute information 305, and indicates whether or not the relay device 2 is movable, and is either “possible” or “impossible.”
  • Transmittable power level (G3) is information included in the attribute information 305, and indicates the transmittable power level of the relay device 2, and is a specific power value. Alternatively, it may be classified into high/medium/low.
  • “Supported bandwidth (G4)” is information included in the attribute information 305, indicates the bandwidth that can be used for communication of the relay device 2, and is a specific bandwidth value. Alternatively, it may be classified into wide/medium/narrow.
  • “Movement speed (G5)” is the information included in the operation status information 306 or the movement speed estimated by the location management unit 53 from the history of the past position information 304, and indicates the movement speed of the relay device 2, and specifies The moving speed is as follows. Alternatively, it may be classified into fast/medium/slow.
  • Communication busy state information (G6) is information included in the operation state information 306, and indicates the band utilization rate in the relay device 2, and is a specific band utilization rate. Alternatively, it may be classified into high/medium/low.
  • Relay device status (G7) is information included in the operational status information 306 and indicates the status of the relay device 2.
  • the status individually defines a state that may affect the relay capability of the relay device 2 depending on the system or application in which the relay device 2 is used. In the example of the list shown in FIG. 7, the case where the corresponding relay device 2 is used only by an application used by the out-of-coverage terminal 1, that is, the case where the corresponding out-of-coverage terminal 1 can exclusively use the corresponding relay device 2 is shown. "Only for main business” is defined, and when the relay device 2 is used for other applications, "also used for other business” is defined.
  • Received power level (between relay device and terminal) (G8) is the received power level information 301 itself, and is a specific received power level or classification such as high/medium/low.
  • the “relay device-terminal distance (G9)” is the distance between the out-of-coverage terminal 1 and the relay device 2, which is calculated from the location information 302 of the out-of-coverage terminal 1 and the location information 304 of the relay device 2.
  • the “relay device-terminal distance (G9)” is a specific distance expressed in meters, or a classification such as far/medium/near.
  • “Received power level (between relay device and base station) (G10)” is similar to “received power level (between relay device and terminal) (G8)” and is the received power level information 303 itself. “Received power level (between relay device and base station) (G10)” is a specific received power level or classification such as high/medium/low.
  • “Distance between base station and relay device (G11)” is similar to “distance between relay device and terminal (G9)” and is calculated from the position information 304 of relay device 2 and the position information of base station 3. It is the distance between the device 2 and the base station 3.
  • the “distance between base station and relay device (G11)” is a specific distance expressed in meters or classification such as far/medium/near. Note that the location information of the base station 3 may be managed by the location management unit 53 or may be managed by a device external to the server device 5.
  • Past communication quality history is information on communication quality when the out-of-coverage terminal 1 connected to the base station 3 via the relay device 2.
  • the relay route determining unit 52 of the server device 5 stores the communication quality when the out-of-coverage terminal 1 communicated via the relay device 2 in the past, and based on the history, it determines the “past communication quality”.
  • “Quality History (G12)” For example, the average transmission speed calculated based on past communication quality or the longest jitter time in the past is set. Alternatively, it may be classified into high/medium/low/no history.
  • the relay route determining unit 52 calculates a score for each relay device 2 using the various acquired information related to the relay device 2 (information G1 to G12 included in the list in FIG. 7), and calculates a score for each relay device 2.
  • the evaluation value is 2.
  • G i (j) the various acquired information.
  • the relay route determining unit 52 calculates evaluation scores S(1) to S(N).
  • the evaluation score S(j) for relay device number j is expressed by the following equation (1).
  • a i is a weight for each type of acquired information G i (j).
  • a i is set as the degree of suitability as a relay destination, and the more important the information is, the higher it is set. For example, as with general relay route selection, if the received power level (between relay device and terminal) (G8) is the most important and no other acquired information is a factor in relay route selection, A By setting A i other than 8 to 0, the evaluation score can be substantially calculated using equation (2).
  • the weight A i may be set according to the purpose or goal of relay route selection, but the method of determining the value of the weight A i is not limited in this embodiment.
  • the relay route determining unit 52 calculates the evaluation scores S(1) to S(N) for each of the relay devices 2 listed in the communicable relay device list 300 according to the above formula (1), and then calculates the maximum
  • the relay device 2 with the evaluation score of is determined as a new connection destination, and a relay switching instruction signal 307 including information on the relay device 2 determined as the connection destination is transmitted to the out-of-coverage terminal 1.
  • the out-of-coverage terminal 1 switches the relay device 2 to be connected, according to the information on the relay device 2 determined as the connection destination, which is included in the received relay switching instruction signal 307.
  • the relay route determination unit 52 determines that the evaluation score S( j) is the largest, it is not necessary to transmit the relay switching instruction signal 307 to the out-of-coverage terminal 1. This makes it possible to prevent unnecessary communications from occurring, and to prevent increases in processing load and communication resource consumption.
  • FIG. 8 is a flowchart showing the operation of the server device 5 described using FIGS. 5 to 7.
  • FIG. 8 is a flowchart showing an example of the operation of the server device 5. As shown in FIG.
  • the server device 5 first obtains measurement information and candidate relay device information from the out-of-coverage terminal 1 (step S21).
  • the measurement information acquired from the out-of-coverage terminal 1 is the received power level information 301 and position information 302 described above.
  • the candidate relay device information is the above-mentioned communicable relay device list 300. That is, step S21 is a process in which the server device 5 acquires various information transmitted from the out-of-coverage terminal 1 in steps S11 to S13 shown in FIG.
  • step S22 The server device 5 then acquires measurement information, attribute information, and operation status information from the relay device 2 (step S22).
  • the measurement information acquired from the relay device 2 is the received power level information 303 and position information 304 described above.
  • the attribute information and operation state information are the above-mentioned attribute information 305 and operation state information 306. That is, step S22 is a process in which the server device 5 acquires various information transmitted from the relay device 2 in steps S14 to S17 shown in FIG.
  • the server device 5 then calculates the evaluation value of each relay device 2 (step S23).
  • the evaluation value to be calculated is the evaluation score S(j) described above.
  • the server device 5 determines the relay device 2 to which the out-of-coverage terminal 1 is connected based on the evaluation value calculated in step S23 (step S24). Specifically, the relay device 2 with the highest calculated evaluation value is determined as the connection destination.
  • the server device 5 determines whether it is necessary to change the connection destination of the out-of-coverage terminal 1, that is, whether the relay device 2 determined as the connection destination in step S24 is the relay device 2 to which the out-of-coverage terminal 1 is currently connected. It is determined whether they are different from each other (step S25). If it is necessary to change the connection destination (step S25: Yes), the server device 5 notifies the out-of-coverage terminal 1 of the relay device 2 to be the new connection destination (step S26). If there is no need to change the connection destination (step S25: No), the server device 5 ends its operation.
  • the server device 5 that operates as a relay route control device that determines a route for data relay between the out-of-coverage terminal 1 and the wired core network 4, Based on the location information and received power level information of the target out-of-coverage terminal 1, and the location information, received power level information, attribute information, and operation status information of the relay device 2 with which the target out-of-coverage terminal 1 can communicate, The evaluation value of each relay device 2 with which the target out-of-coverage terminal 1 can communicate is calculated, and the relay device 2 to which the target out-of-coverage terminal 1 connects is determined.
  • the relay device 2 to which the out-of-coverage terminal 1 is connected can be appropriately selected according to the state of the out-of-coverage terminal 1 and the state of each of the relay devices 2 with which the out-of-coverage terminal 1 can communicate.
  • the relay device 2 to be connected to can be flexibly changed according to changes in the status of the out-of-coverage terminal 1 and the relay device 2 to be connected to.
  • the configuration shown in the above embodiments is an example, and it is possible to combine it with another known technology, and a part of the configuration can be omitted or changed without departing from the gist. It is possible.
  • 1 Out of coverage terminal 2 Relay device, 3 Base station, 4 Wired core network, 5 Server device, 11, 21, 51 Communication control section, 12, 22 Received power measurement section, 13, 23 Position measurement section, 24 Device information management section, 52 relay route determination section, 53 location management section, 54 network management section, 100 communication system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un dispositif serveur (5) qui fonctionne comme un dispositif de commande de trajet de relais comprend : une unité de gestion de position (53) qui gère les informations de position d'un terminal hors couverture (1), qui est un terminal de communication sans fil positionné à l'extérieur de la couverture d'une station de base, et les informations de position de dispositifs relais (2), qui sont des terminaux de communication sans fil positionnés à l'intérieur de la couverture et ayant chacun une fonction de relais pour transférer un signal reçu d'un autre terminal de communication sans fil ; une unité de gestion de réseau (54) qui gère des informations d'attribut et des informations d'état opérationnel des dispositifs relais (2) ; et une unité de détermination de trajet de relais (52) qui, sur la base des informations de position gérées par l'unité de gestion de position (53) et des informations d'attribut et des informations d'état opérationnel gérées par l'unité de gestion de réseau (54), détermine un dispositif relais (2) pour que le terminal hors couverture (1) se connecte lors de la communication avec la station de base.
PCT/JP2022/026696 2022-07-05 2022-07-05 Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage WO2024009385A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023502871A JP7357818B1 (ja) 2022-07-05 2022-07-05 中継経路制御装置、無線通信端末、通信システム、通信経路決定方法、制御回路および記憶媒体
PCT/JP2022/026696 WO2024009385A1 (fr) 2022-07-05 2022-07-05 Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/026696 WO2024009385A1 (fr) 2022-07-05 2022-07-05 Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage

Publications (1)

Publication Number Publication Date
WO2024009385A1 true WO2024009385A1 (fr) 2024-01-11

Family

ID=88205100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/026696 WO2024009385A1 (fr) 2022-07-05 2022-07-05 Dispositif de commande de trajet de relais, terminal de communication sans fil, système de communication, procédé de détermination de trajet de communication, circuit de commande et support de stockage

Country Status (2)

Country Link
JP (1) JP7357818B1 (fr)
WO (1) WO2024009385A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011166595A (ja) * 2010-02-12 2011-08-25 Mitsubishi Electric Corp 無線中継基地局、通信システムおよび無線中継方法
JP2021007192A (ja) * 2019-06-27 2021-01-21 本田技研工業株式会社 通信システム、プログラム、及び情報処理方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011166595A (ja) * 2010-02-12 2011-08-25 Mitsubishi Electric Corp 無線中継基地局、通信システムおよび無線中継方法
JP2021007192A (ja) * 2019-06-27 2021-01-21 本田技研工業株式会社 通信システム、プログラム、及び情報処理方法

Also Published As

Publication number Publication date
JP7357818B1 (ja) 2023-10-06
JPWO2024009385A1 (fr) 2024-01-11

Similar Documents

Publication Publication Date Title
KR101000995B1 (ko) 내력 정보에 기초한 무선 억세스 포인트 동작
US8693948B2 (en) Methods, systems, and computer-readable media for utilizing a repeating function to improve quality of service
JP2007096988A (ja) 通信端末、移動体通信システム、および通信方法
TW201446061A (zh) 改良客戶在整個網路上之分佈的技術
JP2008022089A (ja) 無線通信システム、システム制御装置、無線基地局、無線通信端末、通信制御方法、および通信制御プログラム
US9769853B2 (en) Communication apparatus, communication system, and computer-readable recording medium
JP2012169971A (ja) 通信経路選択装置、通信経路選択方法及びプログラム
CN104509036A (zh) 通过使用无线或有线发现机制共享邻域信息的装置物理位置近似以及过渡装置发现
WO2016118056A1 (fr) Points d'accès à un réseau local sans fil
US10271297B2 (en) Method for operating a cellular radio network
US11064335B2 (en) Method and apparatus for transmitting or receiving data by using bluetooth low energy technology
WO2016088302A1 (fr) Appareil de traitement d'informations, procédé de traitement d'informations, et support non transitoire lisible par ordinateur dans un réseau maillé
WO2016046869A1 (fr) Procédé de mesure de qualité de communication et système de communication
JP6953896B2 (ja) 通信装置、通信システム、通信方法、及び通信プログラム
JP7357818B1 (ja) 中継経路制御装置、無線通信端末、通信システム、通信経路決定方法、制御回路および記憶媒体
JP4712534B2 (ja) 移動体通信システム、無線制御サーバ、および無線通信端末
US11503528B2 (en) Base station, terminal device, control method, and program for handover connections
JP4325663B2 (ja) 無線端末、無線通信ネットワークシステム及びハンドオーバ方法
KR101859382B1 (ko) 스케줄링 정책 서버 및 스케줄링 정책 서버에서의 무선 데이터망 스케줄링 방법
JP5483656B2 (ja) 通信装置、通信方法、およびプログラム
JP6296502B2 (ja) 通信システム
WO2024157607A1 (fr) Dispositif de commande, entité mobile, procédé de commande et programme
WO2021210137A1 (fr) Système de communication sans fil, dispositif de commande de réseau, procédé de commande de réseau et programme
CN114585028B (zh) 网络切换方法及其相关设备
JP5676555B2 (ja) 携帯端末、通信プログラム及び通信システム

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023502871

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22950179

Country of ref document: EP

Kind code of ref document: A1