WO2016002060A1 - Système de transmission radio, dispositif radio, station de base, procédé de commande de dispositif radio, et procédé de commande de station de base - Google Patents

Système de transmission radio, dispositif radio, station de base, procédé de commande de dispositif radio, et procédé de commande de station de base Download PDF

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Publication number
WO2016002060A1
WO2016002060A1 PCT/JP2014/067843 JP2014067843W WO2016002060A1 WO 2016002060 A1 WO2016002060 A1 WO 2016002060A1 JP 2014067843 W JP2014067843 W JP 2014067843W WO 2016002060 A1 WO2016002060 A1 WO 2016002060A1
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WO
WIPO (PCT)
Prior art keywords
wireless
radio
area
communication
base station
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PCT/JP2014/067843
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English (en)
Japanese (ja)
Inventor
矢野　哲也
須田　健二
中村　道春
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富士通株式会社
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Priority to PCT/JP2014/067843 priority Critical patent/WO2016002060A1/fr
Publication of WO2016002060A1 publication Critical patent/WO2016002060A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present invention relates to a wireless communication system, a wireless device, a base station, a wireless device control method, and a base station control method.
  • a wireless communication system including a plurality of wireless devices and a base station
  • the plurality of wireless devices perform communication via the base station and direct communication not via the base station (for example, Patent Document 1, Non-Patent Document). (Ref. 1 and 2).
  • direct communication between wireless devices is expressed as device-to-device (D2D) communication.
  • D2D device-to-device
  • 3GPP “Public safety perspective on resource allocation for D2D group communications”, 3GPP TSG-RAN WG1 # 76 R1-142727, February 2014 3GPP, “Overview of D2D functions and standardization impact”, 3GPP TSG-RAN WG1 # 76 R1-140771, February 2014
  • Radio resources used for device-to-device communication may be different between radio areas formed by base stations. For example, as shown in FIG. 1, it is assumed that the first base station 91 forms a first radio area 96 and the second base station 92 forms a second radio area 97.
  • the first base station 91 uses the first radio resource RR1 in the system band SB for communication between devices in the first radio area 96. assign.
  • the second base station 92 uses a second different from the first radio resource RR1 in the system band SB for communication between devices in the second radio area 97. Radio resource RR2 is allocated.
  • the radio resource used for inter-device communication changes according to the radio area to which the radio device belongs.
  • the first wireless device 93 belonging to the first wireless area 96 and the second wireless device 94 belonging to the second wireless area 97 perform inter-device communication. Is assumed. In this case, if the information regarding the radio resource used for the inter-device communication cannot be appropriately shared between the first radio device 93 and the second radio device 94, the inter-device communication cannot be executed.
  • a predetermined radio resource may be used for inter-device communication for a position formed by a radio communication system that does not belong to any radio area. Therefore, radio resources used for inter-device communication may change depending on whether the radio device belongs to a radio area.
  • the wireless resource used for the communication between the devices when the wireless device moves between wireless areas, or when the wireless device moves between a position belonging to the wireless area and a position not belonging to any wireless area, the wireless resource used for the communication between the devices. If the information regarding the information cannot be properly shared between wireless devices, communication between devices cannot be executed. Thus, there is a possibility that inter-device communication cannot be performed between the first wireless device belonging to a certain wireless area and the second wireless device not belonging to the wireless area.
  • one of the objects of the present invention is to execute inter-device communication between a first wireless device belonging to a certain wireless area and a second wireless device not belonging to the wireless area. is there.
  • a wireless communication system is a device between a base station, a first wireless device belonging to a wireless area formed by the base station, and the first wireless device not belonging to the wireless area.
  • a second wireless device that performs inter-communication, and a control unit.
  • the control unit schedules radio resources used for the inter-device communication. In other words, the control unit allocates radio resources to the inter-device communication.
  • the wireless communication system includes a base station, a plurality of wireless devices that perform device-to-device communication, and a control unit. Whether the control unit includes the plurality of wireless devices including both a first wireless device belonging to a wireless area formed by the base station and a second wireless device not belonging to the wireless area. Determine.
  • Inter-device communication can be executed between a first wireless device belonging to a certain wireless area and a second wireless device not belonging to the wireless area.
  • FIG. 1 is a block diagram illustrating a configuration example of a wireless communication system according to a first embodiment. It is a block diagram showing an example of a structure of the base station shown in FIG. It is a block diagram showing an example of a structure of the radio
  • FIG. 4 is a block diagram illustrating an example of functions of the wireless device illustrated in FIG. 3. It is explanatory drawing which shows an example of the state of the radio
  • FIG. 4 is a sequence diagram illustrating an example of processing according to a first operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 4 is a sequence diagram illustrating an example of processing according to a first operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 4 is a sequence diagram illustrating an example of processing according to a first operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 4 is a sequence diagram illustrating an example of processing according to a second operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 4 is a sequence diagram illustrating an example of processing according to a second operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 6 is a sequence diagram illustrating an example of processing according to a third operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a fourth operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a fourth operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a fifth operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a sixth operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a seventh operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a seventh operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to a seventh operation example of the wireless communication system illustrated in FIG. 3.
  • FIG. 10 is a sequence diagram illustrating an example of processing according to an eighth operation example of the wireless communication system illustrated in FIG. 3.
  • the wireless communication system 1 illustratively includes M base stations 10-1, 10-2,..., 10-M and N wireless devices 20- 1, 20-2,..., 20-N.
  • M represents an integer of 1 or more.
  • the base station 10-m is also referred to as a base station 10 when it is not necessary to distinguish between them.
  • m represents an integer of 1 to M.
  • N represents an integer of 2 or more.
  • the wireless device 20-n is also referred to as a wireless device 20 when it is not necessary to distinguish between them.
  • n represents an integer of 1 to N.
  • the wireless communication system 1 performs wireless communication between the base station 10 and the wireless device 20 in accordance with a predetermined wireless communication method.
  • the wireless communication method is an LTE-Advanced method.
  • LTE is an abbreviation for Long Term Evolution.
  • the wireless communication method may be a method different from the LTE-Advanced method (for example, a method such as LTE or WiMAX (registered trademark)).
  • WiMAX is an abbreviation for Worldwide Interoperability for Microwave Access.
  • each base station 10 forms one radio area.
  • Each base station 10 may form a plurality of radio areas.
  • the wireless area may be represented as a coverage area or a communication area.
  • the radio area is a cell such as a macro cell, a micro cell, a nano cell, a pico cell, a femto cell, a home cell, a small cell, or a sector cell.
  • Each base station 10 is an eNB (Evolved Node B), an NB (Node B), a macro base station, a micro base station, a nano base station, a pico base station, a femto base station, a home base station, or a small base station. It may be.
  • the base station 10 may be represented as a radio base station.
  • each base station 10 is connected to a communication network (for example, a core network) NW capable of wired communication.
  • a communication network NW capable of wireless communication.
  • An interface between the base station 10 and the communication network NW may be referred to as an S1 interface. Further, the interface between the base stations 10 may be referred to as an X2 interface.
  • EPC Evolved Packet Core
  • a network including the base stations 10 in the wireless communication system 1 may be referred to as E-UTRAN.
  • E-UTRAN is an abbreviation for Evolved Universal Terrestrial Radio Access Network.
  • each wireless device 20 may be referred to as a wireless terminal, a wireless device, a mobile station, a mobile terminal, a terminal device, or a user terminal (UE; User Equipment).
  • each wireless device 20 is a mobile phone, a smartphone, a sensor, a meter (measuring instrument), or the like.
  • Each wireless device 20 may be carried by a user, may be mounted on a moving body such as a vehicle, or may be fixed.
  • Each base station 10 allocates radio resources used for indirect communication to the radio devices 20 belonging to the radio area formed by the own station 10. Indirect communication is communication between the wireless devices 20 via the base station 10. In this example, radio resources are identified by time and frequency. Each wireless device 20 performs indirect communication using the wireless resource allocated by the base station 10 that forms the wireless area to which the wireless device 20 belongs. Indirect communication may be referred to as cellular communication.
  • the radio communication system 1 allocates radio resources used for D2D communication to the D2D group.
  • the D2D communication is direct communication between the wireless devices 20 without using the base station 10.
  • D2D communication may be expressed as inter-device communication or direct communication.
  • the D2D group is formed by a plurality of wireless devices 20 that perform D2D communication.
  • the D2D group may be represented as a group or a cluster.
  • the D2D group is formed when the wireless device 20 executes device detection processing.
  • the device detection process is a process in which the wireless device 20 detects another wireless device 20 that can communicate with itself 20.
  • the device detection process may be referred to as D2D Discovery.
  • the device detection process includes the following processes (1) to (3). (1) The first wireless device 20 transmits a predetermined discovery signal. (2) The second wireless device 20 that has received the discovery signal transmits a response signal. (3) When the first wireless device 20 receives the response signal, the second wireless device 20 is detected as a wireless device 20 that can communicate with itself 20.
  • the D2D group includes a group owner 20 that is a wireless device 20 that controls D2D communication in the D2D group.
  • the group owner may be represented as a cluster head.
  • the wireless device 20 different from the group owner 20 may be represented as a group member.
  • Group members may be represented as cluster members.
  • the group owner 20 is an example of a wireless device 20 that controls D2D communication.
  • the D2D group may not include the group owner 20.
  • the group member 20 may communicate with other group members 20 via the group owner 20. Further, the group owner 20 may transmit a synchronization signal every time a predetermined period elapses. In this case, the group member 20 may synchronize with the group owner 20 according to the received synchronization signal.
  • wireless device 20 belonging to the wireless area is that the wireless device 20 can communicate with the base station 10 using the wireless resource allocated by the base station 10 in the wireless area formed by the base station 10. It is. That the wireless device 20 belongs to the wireless area may be expressed as that the wireless device 20 is connected to the base station 10.
  • the base station 10 illustratively includes an antenna 11, a memory 12, a CPU 13, an RF circuit 14, and an LSI 15.
  • CPU is an abbreviation for Central Processing Unit.
  • RF is an abbreviation for Radio Frequency.
  • LSI is an abbreviation for Large Scale Integration.
  • the memory 12 stores information in a readable / writable manner.
  • the memory 12 may be a RAM, a semiconductor memory, or an organic memory.
  • RAM is an abbreviation for Random Access Memory.
  • the memory 12 may include a ROM.
  • ROM is an abbreviation for Read Only Memory.
  • the CPU 13 controls the antenna 11, the memory 12, the RF circuit 14, and the LSI 15 by executing a program stored in the memory 12.
  • the RF circuit 14 transmits and receives radio signals via the antenna 11.
  • transmission / reception of a radio signal includes mutual conversion between a digital signal and an analog signal, frequency conversion, and amplification of the radio signal.
  • the LSI 15 processes a digital signal for performing wireless communication.
  • the LSI 15 outputs a digital signal that is a basis of the transmitted radio signal to the RF circuit 14.
  • a digital signal based on the received radio signal is input from the RF circuit 14 to the LSI 15.
  • the LSI 15 may include a programmable logic circuit device (PLD; Programmable Logic Device).
  • the wireless device 20 illustratively includes an antenna 21, a memory 22, a CPU 23, an RF circuit 24, an LSI 25, and an input / output unit 26.
  • the memory 22, CPU 23, RF circuit 24, and LSI 25 have the same functions as the memory 12, CPU 13, RF circuit 14, and LSI 15, respectively.
  • Information is input to the input / output unit 26.
  • this information may be input by the user of the wireless device 20.
  • the input / output unit 26 outputs information.
  • the input / output unit 26 is a touch panel display.
  • the input / output unit 26 may include a key type button in addition to the display.
  • the input / output unit 26 may include a display of a method different from the touch panel type.
  • the base station 10 functionally includes a receiving unit 101, a data signal processing unit 102, a control signal processing unit 103, a control unit 104, a data signal generation unit 105, and a control signal.
  • a generation unit 106 and a transmission unit 107 are provided.
  • the transmission unit 107 may be an example of a notification unit that notifies information indicating a radio resource after movement.
  • the receiving unit 101 and the transmitting unit 107 are realized by the RF circuit 14.
  • the antenna 11 includes a reception antenna 11a and a transmission antenna 11b.
  • the antenna 11 may include a duplexer, and one antenna may be shared by the duplexer for transmission and reception.
  • functional units 102 to 106 different from the receiving unit 101 and the transmitting unit 107 among the functions of the base station 10 are realized by the LSI 15. Note that at least part of the functional units 102 to 106 may be realized by the CPU 13 and the memory 12.
  • the control unit 104 allocates radio resources to communication of control signals and data signals in indirect communication.
  • the allocation of radio resources may be expressed as radio resource scheduling.
  • the reception unit 101 executes reception processing on the radio signal received via the reception antenna 11a, and outputs the execution result as a reception signal.
  • the reception process includes amplification of a radio signal, conversion from a radio frequency to a base frequency (in other words, down conversion), and conversion from an analog signal to a digital signal.
  • the data signal processing unit 102 processes the data signal based on the portion of the received signal corresponding to the radio resource assigned to the data signal communication by the control unit 104.
  • the data signal processing unit 102 performs demodulation / decoding processing on the data signal.
  • the demodulation / decoding process includes a process of demodulating the data signal and an error correction decoding process based on error correction coding applied to the data signal.
  • the demodulation / decoding process may include an error detection process based on an error detection code added to the data signal.
  • the control signal processing unit 103 processes the control signal based on the portion of the received signal corresponding to the radio resource assigned to the communication of the control signal by the control unit 104.
  • the control signal processing unit 103 performs demodulation / decoding processing on the control signal.
  • the demodulation / decoding process includes a process of demodulating the control signal and an error correction decoding process based on error correction coding applied to the control signal.
  • the demodulation / decoding process may include an error detection process based on an error detection code added to the control signal.
  • the control signal generator 106 generates a control signal for controlling communication.
  • the control signal generation unit 106 outputs the generated control signal to the transmission unit 107 so that the transmission unit 107 transmits the control signal using the radio resource assigned to the control signal communication by the control unit 104.
  • the control signal includes allocation information indicating the radio resource allocated by the control unit 104.
  • the data signal generation unit 105 generates a data signal representing user data.
  • the data signal generation unit 105 performs encoding / modulation processing on the generated data signal.
  • the encoding / modulation process includes a process of performing error correction encoding on the data signal and a process of modulating the data signal.
  • the encoding / modulation process may include a process of adding an error detection code to the data signal.
  • the data signal generation unit 105 outputs the generated data signal to the transmission unit 107 so that the transmission unit 107 transmits the data signal using the radio resource assigned to the data signal communication by the control unit 104.
  • the transmission unit 107 performs transmission processing on the signals output from the data signal generation unit 105 and the control signal generation unit 106, and transmits a radio signal that is the execution result via the transmission antenna 11b.
  • the transmission process includes conversion from a digital signal to an analog signal, conversion from a base frequency to a radio frequency (in other words, up-conversion), and amplification of the radio signal. Details of the functions of the base station 10 are supplemented by an explanation of the operation described later.
  • the wireless device 20 functionally includes a receiving unit 201, a measuring unit 202, a data signal processing unit 203, a control signal processing unit 204, a control unit 205, and a data signal generation unit. 206, a control signal generation unit 207, and a transmission unit 208.
  • the control unit 205 may be an example of a control unit that performs scheduling of radio resources used for D2D communication.
  • the transmission unit 208 may be an example of a notification unit that notifies information indicating a radio resource after movement.
  • the receiving unit 201 and the transmitting unit 208 may be an example of a communication unit that performs D2D communication.
  • the reception unit 201 and the transmission unit 208 are realized by the RF circuit 24.
  • the antenna 21 includes a reception antenna 21a and a transmission antenna 21b.
  • the antenna 21 may include a duplexer, and one antenna may be shared by the duplexer for transmission and reception.
  • the functional units 202 to 207 different from the receiving unit 201 and the transmitting unit 208 among the functions of the wireless device 20 are realized by the LSI 25. Note that at least a part of the functional units 202 to 207 may be realized by the CPU 23 and the memory 22.
  • the control unit 205 allocates radio resources to communication of control signals and data signals in indirect communication based on allocation information included in control signals received from the base station 10. Or the control part 205 allocates the radio
  • a resource pool is a candidate for radio resources allocated to D2D communication.
  • a resource pool may be represented as a resource candidate. The selection of radio resources from the resource pool may be performed by the base station 10. Further, the radio device 20 may select the radio resource from the resource pool.
  • the reception unit 201 executes reception processing on the radio signal received via the reception antenna 21a, and outputs the execution result as a reception signal.
  • the measuring unit 202 measures the quality of the radio signal received from the base station 10.
  • the quality may be represented by CQI, RSRP, SINR, RSRQ, or the like.
  • CQI is an abbreviation for Channel Quality Indicator.
  • RSRP is an abbreviation for Reference Signal Received Power.
  • SINR is an abbreviation for Signal to Interference plus Noise Ratio.
  • RSRQ is an abbreviation for Reference Signal Received Quality.
  • the data signal processing unit 203 processes the data signal based on a portion of the received signal corresponding to the radio resource assigned to the data signal communication by the control unit 205. In this example, the data signal processing unit 203 performs demodulation / decoding processing on the data signal.
  • the control signal processing unit 204 processes the control signal based on the portion of the received signal corresponding to the radio resource assigned to control signal communication by the control unit 205. In this example, the control signal processing unit 204 performs demodulation / decoding processing on the control signal.
  • the control signal generation unit 207 generates a control signal for controlling communication.
  • the control signal generation unit 207 outputs the generated control signal to the transmission unit 208 so that the transmission unit 208 transmits the control signal using the radio resource assigned to the control signal communication by the control unit 205.
  • the control signal includes a measurement report including information indicating the quality measured by the measurement unit 202.
  • the data signal generation unit 206 generates a data signal representing user data.
  • the data signal generation unit 206 performs encoding / modulation processing on the generated data signal.
  • the data signal generation unit 206 outputs the generated data signal to the transmission unit 208 so that the transmission unit 208 transmits the data signal using the radio resource assigned to the data signal communication by the control unit 205.
  • the transmission unit 208 performs transmission processing on the signals output from the data signal generation unit 206 and the control signal generation unit 207, and transmits a radio signal that is the execution result via the transmission antenna 21b.
  • the details of the function of the wireless device 20 are supplemented by the description of the operation described later.
  • a D2D group including wireless devices 20-1 to 20-3 is formed as illustrated in FIG.
  • the wireless device 20-3 is a group owner
  • the wireless devices 20-1 and 20-2 are group members.
  • the D2D group may include a wireless device 20 (not shown).
  • the D2D group may be referred to as a D2D pair.
  • the wireless communication system 1 may not form a D2D group.
  • the base station 10-1 forms the wireless area 30-1 and the base station 10-2 forms the wireless area 30-2.
  • the wireless area 30-1 and the wireless area 30-2 are represented as a wireless area # 1 and a wireless area # 2, respectively. It is assumed that the group owner 20-3 belongs to the wireless area 30-1.
  • the wireless communication system 1 sets a first resource pool for the wireless area 30-1, and sets a second resource pool different from the first resource pool for the wireless area 30-2. Further, the wireless communication system 1 sets a plurality of different resource pools in a plurality of other wireless areas (not shown).
  • the wireless communication system 1 sets a resource pool different from the resource pool set for each wireless area outside the wireless area.
  • Outside the wireless area is an area formed by a position where the wireless device 20 does not belong to any wireless area, which is formed by the wireless communication system 1 (in this example, the base station 10).
  • the resource pool set for each wireless area may be represented as the resource pool for that wireless area. Further, the resource pool set for the outside of the radio area may be represented as a resource pool outside the radio area.
  • Each wireless device 20 may hold in advance information for identifying a resource pool outside the wireless area. Each wireless device 20 may receive information for identifying a resource pool outside the wireless area from the base station 10 that forms the wireless area to which the wireless device 20 belongs.
  • the wireless communication system 1 related to signal transmission from the wireless device 20-1 to the wireless device 20-2 will be described. Although transmission of signals from the wireless device 20-2 to the wireless device 20-1 is performed in the same manner, the description is omitted because it is described in the same manner.
  • the wireless device 20-1 and the wireless device 20-2 may be referred to as a transmitting device 20-1 and a receiving device 20-2, respectively.
  • the wireless communication system 1 may have a function corresponding to any one of operation examples to be described later or an arbitrary combination.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the wireless area 30-2.
  • the transmitting device 20-1 belongs to the wireless area 30-2, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2.
  • Each of the transmitting device 20-1 and the receiving device 20-2 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the wireless device 20 receives information indicating a resource block used as a resource pool from the base station 10-1 as information for identifying the resource pool of the wireless area # 1.
  • the information indicating the resource block may include information indicating the subframe.
  • the wireless device 20 may identify the resource pool of the wireless area based on the identifier for identifying the wireless area. In this case, the identifier for identifying the wireless area is an example of information for identifying the resource pool of the wireless area.
  • the transmitting device 20-1 transmits the control signal and the data signal in the D2D communication using the radio resource selected from the resource pool of the radio area # 1 (step S101 in FIG. 10). ).
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 1. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the transmitting device 20-1 moves from the wireless area # 1 toward the wireless area 30-2 (wireless area # 2). Then, the transmitting device 20-1 measures the quality of the radio signal received from each of the base station 10-1 and the base station 10-2.
  • the transmitting device 20-1 transmits a measurement report including information indicating the measured quality to the base station 10-1 (step S102 in FIG. 10).
  • the measurement report may be transmitted every time a predetermined period elapses.
  • the measurement report may be transmitted when the measured quality satisfies a predetermined condition.
  • the base station 10-1 receives the measurement report from the transmitting device 20-1, and determines whether or not to perform a handover (HO; Hand-over) based on the received measurement report. For example, the base station 10-1 determines that the quality of the radio signal for the radio area # 1 to which the transmitting device 20-1 belongs is lower than the quality of the radio signal for the radio area # 2 different from the radio area # 1 by a predetermined amount or more. Decide to implement HO.
  • HO Hand-over
  • the base station 10-1 decides to implement HO (step S103 in FIG. 10).
  • the base station 10-1 transmits a HO request for requesting HO to the HO destination base station 10-2 (step S104 in FIG. 10).
  • the base station 10-2 determines whether to permit HO in response to the HO request from the base station 10-1.
  • the base station 10-2 determines to permit HO.
  • the base station 10-2 transmits HO permission indicating permission of HO (step S105 in FIG. 10).
  • the HO permission may be expressed as an ACK (Acknowledgement) message.
  • the HO permission includes information for identifying the resource pool of the wireless area # 2.
  • the base station 10-1 may hold in advance information for identifying the resource pool of the wireless area # 2.
  • the HO permission may not include information for identifying the resource pool of the wireless area # 2.
  • the base station 10-1 When the base station 10-1 receives the HO permission from the base station 10-2, the base station 10-1 transmits a HO instruction instructing the implementation of HO to the transmitting device 20-1 (step S106 in FIG. 10).
  • the HO instruction includes information for identifying the resource pool of the wireless area # 2.
  • the transmitting device 20-1 transmits the radio resource information using the radio resource selected from the resource pool of the radio area # 1 (step S107 in FIG. 10).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the radio resource information is included in a control signal in D2D communication.
  • the radio resource information may be included in a data signal in D2D communication.
  • the receiving device 20-2 receives the radio resource information transmitted by the transmitting device 20-1. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 2.
  • the receiving device 20-2 in the period T1 before the time when the wireless resource information is received from the transmitting device 20-1, is based on the control signal and the portion corresponding to the resource pool of the wireless area # 1. Process the data signal. In addition, the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 2 in the period T2 after the time when the wireless resource information is received from the transmitting device 20-1. Process.
  • the transmitting device 20-1 performs HO for the wireless area # 2 (step S108 in FIG. 10). As a result, the transmitting device 20-1 belongs to the wireless area # 2. Then, the transmitting device 20-1 transmits the control signal and the data signal in the D2D communication using the radio resource selected from the resource pool of the radio area # 2 (Step S109 in FIG. 10).
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 2. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • step S101 in FIG. 10 may include the process illustrated in FIG. As shown in FIG. 11, the base station 10-1 selects a radio resource used for signal transmission from the transmission device 20-1 to the reception device 20-2 from the resource pool of the radio area # 1 (FIG. 11). Step S201). Then, the base station 10-1 transmits allocation information for identifying the selected radio resource to the transmitting device 20-1 (step S202 in FIG. 11).
  • the transmitting device 20-1 receives the allocation information from the base station 10-1. Then, the transmitting device 20-1 determines the MCS (step S203 in FIG. 11).
  • MCS is an abbreviation for Modulation and Coding Scheme. The MCS may be determined based on the quality of D2D communication.
  • MCS is 16QAM (1/2) or QPSK (1/2).
  • 16QAM (1/2) represents an MCS having a coding rate of 1/2 and a modulation scheme of 16QAM.
  • QPSK (1/2) represents MCS with a coding rate of 1/2 and a modulation scheme of QPSK.
  • QAM is an abbreviation for Quadrature Amplitude Modulation.
  • QPSK is an abbreviation for Quadrature Phase Shift Keying.
  • the MCS may be expressed using a data size (for example, the number of bits) instead of the coding rate.
  • the transmitting device 20-1 selects at least a part of the radio resource identified by the received allocation information, and allocates the selected radio resource for data signal transmission. Then, the transmission device 20-1 transmits a control signal in D2D communication using the radio resource identified by the received allocation information (step S204 in FIG. 11).
  • the control signal includes allocation information for identifying a radio resource allocated for transmission of the data signal, and MCS information indicating the determined MCS.
  • the receiving device 20-2 processes the control signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 1. Thereby, the receiving device 20-2 acquires the allocation information and the MCS information included in the control signal.
  • the transmission device 20-1 Based on the determined MCS, the transmission device 20-1 performs encoding / modulation processing on the data signal.
  • the transmitting device 20-1 transmits the data signal in the D2D communication using the radio resource allocated for transmitting the data signal (step S205 in FIG. 11).
  • the receiving device 20-2 processes the data signal based on the portion of the received signal corresponding to the radio resource identified by the allocation information and the MCS information.
  • the receiving device 20-2 may transmit a response signal indicating whether or not the data signal is normally received in response to the reception of the data signal.
  • the response signal may be an ACK message indicating that the data signal has been normally received or a NACK (Negative ACK) message indicating that the data signal has not been normally received.
  • step S205 of FIG. 11 the processes of steps S201 to S205 of FIG. 11 may be repeatedly executed. Further, after the process of step S205 of FIG. 11 is executed, the processes of steps S203 to S205 of FIG. 11 may be repeatedly executed. In this case, if the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information.
  • step S205 of FIG. 11 the processes of steps S204 to S205 of FIG. 11 may be repeatedly executed.
  • the control signal since the MCS does not change, the control signal may not include the MCS information.
  • the control signal when the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information. In this case, transmission of the control signal may not be executed. In other words, after the process of step S205 of FIG. 11 is executed, the process of step S205 of FIG. 11 may be repeatedly executed.
  • step S109 in FIG. 10 uses the resource pool of radio area # 2 instead of radio area # 1, and the base station 10-2 performs the processes of steps S201 to S202 instead of the base station 10-1.
  • the process similar to the process of FIG. 11 may be included except the point to perform.
  • FIG. 10 may include the process illustrated in FIG. 12 instead of the process shown in FIG. 11 or in addition to the process shown in FIG.
  • the transmission device 20-1 selects a radio resource used for signal transmission from the transmission device 20-1 to the reception device 20-2 from the resource pool of the radio area # 1 (FIG. 12). Step S301).
  • the transmitting apparatus 20-1 uses the selected radio resource in place of the radio resource identified by the allocation information received from the base station 10-1, and is similar to the processes in steps S203 to S205 in FIG. Then, the processing of steps S302 to S304 in FIG. 12 is executed.
  • step S304 of FIG. 12 the processes of steps S301 to S304 of FIG. 12 may be repeatedly executed. Further, after the process of step S304 of FIG. 12 is executed, the processes of steps S302 to S304 of FIG. 12 may be repeatedly executed. In this case, if the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information.
  • the processes in steps S303 to S304 in FIG. 12 may be repeatedly executed.
  • the control signal since the MCS does not change, the control signal may not include the MCS information.
  • the control signal when the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information. In this case, transmission of the control signal may not be executed. In other words, after the process of step S304 of FIG. 12 is executed, the process of step S304 of FIG. 12 may be repeatedly executed.
  • the process in step S109 in FIG. 10 may include the same process as the process in FIG. 12 except that the resource pool in the wireless area # 2 is used instead of the wireless area # 1.
  • FIG. 10 may include the process illustrated in FIG. 11 or the process illustrated in FIG.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 receives information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the receiving device 20-2 belongs when the D2D group or the D2D pair is formed. Good.
  • each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless device 20-1 when the wireless device 20-1 moves from the position belonging to the wireless area # 1 to the position belonging to the wireless area # 2, the wireless device 20-1 uses the D2D communication after the movement. Information indicating the wireless resource is notified to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is made when the wireless device 20-1 assigns a wireless resource assigned to a position belonging to the wireless area # 1 (in this example, a wireless resource selected from the resource pool of the wireless area # 1). ) Is used to perform D2D communication.
  • the wireless device 20 different from the wireless device 20-1 for example, the wireless device 20-3) or the wireless device 20 different from the wireless device 20-1 than the case where the notification is performed by the base station 10, Alternatively, the load on the base station 10 can be reduced.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the outside of the wireless area.
  • the transmitting device 20-1 does not belong to any wireless area, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2.
  • Each of the transmitting device 20-1 and the receiving device 20-2 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the transmitting device 20-1 transmits the control signal and the data signal in the D2D communication using the radio resource selected from the resource pool of the radio area # 1 (step S401 in FIG. 14). ).
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 1. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the transmitting device 20-1 moves from the wireless area # 1 toward the outside of the wireless area. Then, the transmitting device 20-1 measures the quality of radio signals (for example, reference signals) received from the base station 10-1 and each of the base stations 10 different from the base station 10-1.
  • radio signals for example, reference signals
  • the transmitting device 20-1 detects movement outside the wireless area (step S402 in FIG. 14).
  • the transmitting device 20-1 has a wireless signal quality from the base station 10-1 that is lower than a predetermined first threshold and the quality of the wireless signal from the base station 10 different from the base station 10-1. If it is lower than the predetermined second threshold, movement outside the wireless area may be detected. Further, the movement outside the radio area may indicate that the transmission device 20-1 is scheduled to be located outside the radio area, or that the transmission device 20-1 is located outside the radio area.
  • the transmitting device 20-1 may detect movement outside the wireless area by using the reception power of the wireless signal instead of the quality.
  • the transmission device 20-1 When the transmission device 20-1 detects movement out of the radio area, it transmits radio resource information using the radio resource selected from the resource pool of the radio area # 1 (step S403 in FIG. 14).
  • the radio resource information includes information for identifying a resource pool outside the radio area.
  • the radio resource information may include information indicating movement outside the radio area in addition to the information identifying the resource pool outside the radio area or instead of the information identifying the resource pool outside the radio area. .
  • the receiving device 20-2 receives the radio resource information transmitted by the transmitting device 20-1. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool outside the radio area.
  • the receiving device 20-2 in the period T1 before the time when the wireless resource information is received from the transmitting device 20-1, is based on the control signal and the portion corresponding to the resource pool of the wireless area # 1. Process the data signal. In addition, the receiving device 20-2 transmits the control signal and the data signal based on the portion corresponding to the resource pool outside the wireless area in the period T2 after the time when the wireless resource information is received from the transmitting device 20-1. To process.
  • the transmitting device 20-1 is located outside the wireless area. Then, the transmitting device 20-1 transmits the control signal and the data signal in the D2D communication using the radio resource selected from the resource pool outside the radio area (step S404 in FIG. 14).
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool outside the wireless area. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the process in step S401 in FIG. 14 may include one or both of the process illustrated in FIG. 11 and the process illustrated in FIG.
  • the process in step S404 in FIG. 14 may include the same process as the process in FIG. 12 except that a resource pool outside the radio area is used instead of the radio area # 1.
  • the process of step S403 in FIG. 14 may include the process illustrated in FIG. 11 or the process illustrated in FIG.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 receives information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the receiving device 20-2 belongs when the D2D group or the D2D pair is formed. Good.
  • each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless resource 20-1 uses wireless resources for D2D communication after the movement. Is sent to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is made when the radio device 20-1 assigns radio resources assigned to positions belonging to the radio area # 1 (in this example, radio resources selected from the resource pool of the radio area # 1). ) Is used to perform D2D communication.
  • the wireless device 20 different from the wireless device 20-1 for example, the wireless device 20-3) or the wireless device 20 different from the wireless device 20-1 than the case where the notification is performed by the base station 10, Alternatively, the load on the base station 10 can be reduced.
  • the transmitting device 20-1 does not belong to any wireless area, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 moves from outside the wireless area to the wireless area 30-1.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmission device 20-1 is located outside the wireless area.
  • the receiving device 20-2 belongs to the wireless area 30-1 (wireless area # 1).
  • Each of the transmission device 20-1 and the reception device 20-2 holds information for identifying a resource pool outside the wireless area in advance.
  • the transmitting device 20-1 transmits the control signal and the data signal in the D2D communication using the radio resource selected from the resource pool outside the radio area (step S501 in FIG. 15). .
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool outside the wireless area. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the transmitting device 20-1 moves from outside the wireless area toward the wireless area # 1. Then, the transmitting device 20-1 measures the quality of a radio signal (for example, a reference signal) received from the base station 10-1.
  • a radio signal for example, a reference signal
  • the transmitting device 20-1 detects the wireless area # 1 (step S502 in FIG. 15). For example, the transmitting device 20-1 may detect the wireless area # 1 when the quality of the wireless signal from the base station 10-1 is higher than a predetermined threshold. The detection of the wireless area # 1 may indicate that the transmission device 20-1 is scheduled to belong to the wireless area # 1. Note that the transmitting device 20-1 may detect the wireless area # 1 by using the received power of the wireless signal instead of the quality.
  • the transmitting device 20-1 When the transmitting device 20-1 detects the wireless area # 1, the transmitting device 20-1 executes a process for belonging to the wireless area # 1 to the base station 10-1 forming the wireless area # 1.
  • the process for belonging to the wireless area # 1 may include a random access procedure.
  • the process for belonging to the wireless area # 1 may be expressed as a link establishment procedure.
  • the transmitting device 20-1 transmits a resource request to the base station 10-1 (step S503 in FIG. 15).
  • the resource request is information for requesting transmission of information for identifying the resource pool of the wireless area # 1.
  • the base station 10-1 When receiving the resource request from the transmitting device 20-1, the base station 10-1 transmits the resource pool information to the transmitting device 20-1 (step S504 in FIG. 15).
  • the resource pool information includes information for identifying the resource pool of the wireless area # 1.
  • the transmitting device 20-1 When receiving the resource pool information from the base station 10-1, the transmitting device 20-1 transmits the radio resource information using the radio resource selected from the resource pool outside the radio area (step S505 in FIG. 15).
  • the radio resource information includes information for identifying the resource pool of the radio area # 1.
  • the radio resource information may include information indicating movement to the radio area # 1.
  • the receiving device 20-2 receives the radio resource information transmitted by the transmitting device 20-1. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 1.
  • the receiving device 20-2 controls the control signal and the data based on the portion corresponding to the resource pool outside the wireless area in the period T1 before the time when the wireless resource information is received from the transmitting device 20-1. Process the signal. In addition, the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 1 in the period T2 after the time when the wireless resource information is received from the transmitting device 20-1. Process.
  • the transmission device 20-1 transmits a control signal and a data signal in D2D communication using the radio resource selected from the resource pool of the radio area # 1 (step S506 in FIG. 15).
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 1. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the process in step S501 in FIG. 15 may include the same process as the process in FIG. 12 except that a resource pool outside the radio area is used instead of the radio area # 1.
  • the process of step S506 in FIG. 15 may include one or both of the process illustrated in FIG. 11 and the process illustrated in FIG.
  • the process of step S505 in FIG. 15 includes the process illustrated in FIG. 11 or the same process as the process illustrated in FIG. 12 except that a resource pool outside the radio area is used instead of the radio area # 1. It's okay.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless resource 20-1 uses wireless resources for D2D communication after the movement. Is sent to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification uses a radio resource (in this example, a radio resource selected from a resource pool outside the radio area) assigned to a position outside the radio area by the radio device 20-1. This is executed by performing D2D communication.
  • a radio resource in this example, a radio resource selected from a resource pool outside the radio area assigned to a position outside the radio area by the radio device 20-1. This is executed by performing D2D communication.
  • the wireless device 20 different from the wireless device 20-1 for example, the wireless device 20-3) or the wireless device 20 different from the wireless device 20-1 than the case where the notification is performed by the base station 10, Alternatively, the load on the base station 10 can be reduced.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the wireless area 30-2.
  • the transmitting device 20-1 belongs to the wireless area 30-2, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2 and the wireless device (group owner in this example) 20-3.
  • Each of the transmitting device 20-1, the receiving device 20-2, and the wireless device 20-3 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the wireless communication system 1 executes the same processing as steps S101 to S106 in FIG. After execution of the process of step S106, as illustrated in FIG. 16, the transmission device 20-1 uses the radio resource selected from the resource pool of the radio area # 1 to transmit radio resource information to the radio device 20-3. Is transmitted (step S601 in FIG. 16).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the transmission device 20-1 may execute processing for determining the radio resource used for D2D communication.
  • the process for assigning radio resources may include a random access procedure.
  • the process for allocating radio resources may be expressed as a link establishment procedure.
  • the wireless device 20-3 receives the wireless resource information transmitted by the transmitting device 20-1. Then, the wireless device 20-3 transmits the wireless resource information to the receiving device 20-2 using the wireless resource selected from the resource pool of the wireless area # 1 (step S602 in FIG. 16).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2 and information for identifying the transmitting device 20-1. Note that the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the receiving device 20-2 receives the wireless resource information transmitted by the wireless device 20-3. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 2.
  • the receiving device 20-2 in the period T1 prior to the time when the radio resource information is received from the group owner 20-3, based on the control signal and the part corresponding to the resource pool of the radio area # 1 Process the data signal. Further, the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 2 in the period T2 after the time when the wireless resource information is received from the group owner 20-3. Process.
  • the wireless communication system 1 executes the processing of steps S108 to S109 of FIG. 16 in the same manner as steps S108 to S109 of FIG.
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 2. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • step S601 in FIG. 16 is the same as the process illustrated in FIG. 11 or illustrated in FIG. 12 except that the radio apparatus 20-3 receives a signal instead of the reception apparatus 20-2. A process similar to the process may be included.
  • step S602 in FIG. 16 is the same as the process illustrated in FIG. 11 except that the wireless device 20-3 transmits a signal instead of the transmission device 20-1, or illustrated in FIG. A process similar to the process may be included.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 may receive information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the receiving device 20-2 belongs at the time of forming the D2D group.
  • each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless communication system 1 may perform HO before the transmission device 20-1 transmits the wireless resource information.
  • the transmitting device 20-1 after executing the processing of step S106, performs HO to the wireless area # 2 as illustrated in FIG. 17 (step S108 of FIG. 17).
  • the transmission device 20-1 executes processing for determining radio resources used for D2D communication with the radio device 20-3.
  • the transmitting device 20-1 transmits the wireless resource information to the wireless device 20-3 using the determined wireless resource (step S701 in FIG. 17).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the wireless device 20-3 receives the wireless resource information transmitted by the transmitting device 20-1. Then, the wireless device 20-3 transmits the wireless resource information to the receiving device 20-2 using the wireless resource selected from the resource pool of the wireless area # 1 (step S702 in FIG. 17).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2 and information for identifying the transmitting device 20-1. Note that the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the receiving device 20-2 receives the wireless resource information transmitted by the wireless device 20-3. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 2.
  • step S109 of FIG. 17 executes the process of step S109 of FIG. 17 in the same manner as step S109 of FIG.
  • the processing in step S702 in FIG. 17 is the same as the processing illustrated in FIG. 11 except that the wireless device 20-3 transmits a signal instead of the transmitting device 20-1, or in FIG. Processing similar to the processing illustrated may be included.
  • the wireless device 20-1 when the wireless device 20-1 moves from the position belonging to the wireless area # 1 to the position belonging to the wireless area # 2, the wireless device 20-1 uses the D2D communication after the movement. Information indicating the wireless resource is notified to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is executed by the group owner 20-3 that controls the D2D communication. According to this, the load on the radio device 20-1 or the base station 10 can be reduced as compared with the case where the notification is performed by the radio device 20-1 or the base station 10.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the wireless area 30-2.
  • the transmitting device 20-1 belongs to the wireless area 30-2, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2 and the wireless device (group owner in this example) 20-3.
  • Each of the transmitting device 20-1, the receiving device 20-2, and the wireless device 20-3 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the wireless communication system 1 executes the same processing as steps S101 to S106 in FIG. After execution of the process of step S106, as illustrated in FIG. 18, the base station 10-1 transmits radio resource information to the radio device 20-3 (step S801 in FIG. 18).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2 and information for identifying the transmitting device 20-1.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the wireless device 20-3 receives the wireless resource information transmitted by the base station 10-1. Then, the wireless device 20-3 transmits the wireless resource information to the receiving device 20-2 using the wireless resource selected from the resource pool of the wireless area # 1 (step S802 in FIG. 18).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2 and information for identifying the transmitting device 20-1.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2. Further, the radio resource information may include information for identifying the receiving device 20-2.
  • the receiving device 20-2 receives the wireless resource information transmitted by the wireless device 20-3. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 2.
  • the receiving device 20-2 in the period T1 prior to the time when the radio resource information is received from the group owner 20-3, based on the control signal and the part corresponding to the resource pool of the radio area # 1 Process the data signal. Further, the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 2 in the period T2 after the time when the wireless resource information is received from the group owner 20-3. Process.
  • the wireless communication system 1 executes the processing of steps S108 to S109 of FIG. 18 in the same manner as steps S108 to S109 of FIG.
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 2. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • step S802 in FIG. 18 is the same as the process illustrated in FIG. 11 except that the wireless device 20-3 transmits a signal instead of the transmission device 20-1, or illustrated in FIG. A process similar to the process may be included.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 may receive information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the receiving device 20-2 belongs at the time of forming the D2D group.
  • each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless device 20-3 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the base station 10 forming the radio area to which the radio device 20-3 belongs transmits radio resource information instead of the base station 10-1.
  • the wireless device 20-3 moves after the movement. 1 notifies the wireless device 20-2 of information indicating the wireless resource used for D2D communication.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is performed by the group owner 20-3 that controls the D2D communication. According to this, the load on the radio device 20-1 or the base station 10 can be reduced as compared with the case where the notification is performed by the radio device 20-1 or the base station 10.
  • the wireless communication system 1 may execute processing in which the order in which Step S106 and Step S801 in FIG. 18 are executed is changed.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the outside of the wireless area.
  • the transmitting device 20-1 does not belong to any wireless area, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2 and the wireless device (group owner in this example) 20-3.
  • Each of the transmitting device 20-1, the receiving device 20-2, and the wireless device 20-3 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the wireless communication system 1 executes the same processing as steps S401 to S402 in FIG. After the execution of the process of step S402, as illustrated in FIG. 19, the transmission device 20-1 uses the radio resource selected from the resource pool of the radio area # 1 to transmit radio resource information to the radio device 20-3. Is transmitted (step S901 in FIG. 19).
  • the radio resource information includes information for identifying a resource pool outside the radio area.
  • the radio resource information may include information indicating movement outside the radio area in addition to the information identifying the resource pool outside the radio area or instead of the information identifying the resource pool outside the radio area. .
  • the transmission device 20-1 may execute processing for determining the radio resource used for D2D communication.
  • the transmitting device 20-1 For example, as the moving speed of the transmitting device 20-1 increases, the transmitting device 20-1 is likely to be located outside the wireless area before the movement outside the wireless area is detected. Therefore, the transmission device 20-1 may be located outside the wireless area before movement outside the wireless area is detected. In this case, the radio resource used for D2D communication between the transmission device 20-1 and the radio device 20-3 has not been determined. Accordingly, in this case, the transmission device 20-1 executes processing for determining radio resources used for D2D communication with the radio device 20-3. In this case, the transmitting device 20-1 transmits wireless resource information to the wireless device 20-3 using the determined wireless resource.
  • the wireless device 20-3 receives the wireless resource information transmitted by the transmitting device 20-1. Then, the wireless device 20-3 transmits the wireless resource information to the receiving device 20-2 using the wireless resource selected from the resource pool of the wireless area # 1 (step S902 in FIG. 19).
  • the radio resource information includes information for identifying a resource pool outside the radio area and information for identifying the transmitting device 20-1.
  • the radio resource information may include information indicating movement outside the radio area in addition to the information identifying the resource pool outside the radio area or instead of the information identifying the resource pool outside the radio area. .
  • the receiving device 20-2 receives the wireless resource information transmitted by the wireless device 20-3. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool outside the radio area.
  • the receiving device 20-2 in the period T1 prior to the time when the radio resource information is received from the group owner 20-3, based on the control signal and the part corresponding to the resource pool of the radio area # 1 Process the data signal.
  • the receiving device 20-2 transmits the control signal and the data signal based on the part corresponding to the resource pool outside the radio area in the period T2 after the time when the radio resource information is received from the group owner 20-3. Process.
  • step S404 of FIG. 19 the wireless communication system 1 executes the process of step S404 of FIG. 19 in the same manner as step S404 of FIG.
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool outside the radio area. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • step S901 in FIG. 19 is the same as the process illustrated in FIG. 11 or illustrated in FIG. 12 except that the radio apparatus 20-3 receives a signal instead of the reception apparatus 20-2. A process similar to the process may be included.
  • step S902 in FIG. 19 is the same as the process illustrated in FIG. 11 except that the wireless device 20-3 transmits a signal instead of the transmission device 20-1, or illustrated in FIG. A process similar to the process may be included.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 may receive information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the receiving device 20-2 belongs at the time of forming the D2D group.
  • each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless device 20-1 when the wireless device 20-1 moves from a position belonging to the wireless area # 1 to a position belonging to the outside of the wireless area, the wireless device 20-1 uses wireless communication for D2D communication after the movement. Information indicating the resource is notified to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is performed by the group owner 20-3 that controls the D2D communication. According to this, the load on the radio device 20-1 or the base station 10 can be reduced as compared with the case where the notification is performed by the radio device 20-1 or the base station 10.
  • the transmitting device 20-1 does not belong to any wireless area, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 moves from outside the wireless area to the wireless area 30-1.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmission device 20-1 is located outside the wireless area.
  • the receiving device 20-2 belongs to the wireless area 30-1 (wireless area # 1) together with the wireless device (group owner in this example) 20-3.
  • Each of the transmitting device 20-1, the receiving device 20-2, and the wireless device 20-3 holds information for identifying a resource pool outside the wireless area in advance.
  • the wireless communication system 1 performs the same processing as steps S501 to S504 in FIG. After execution of the process of step S504, as illustrated in FIG. 20, the transmission device 20-1 uses the radio resource selected from the resource pool outside the radio area to transmit the radio resource information to the radio device 20-3. Transmission is performed (step S1001 in FIG. 20).
  • the radio resource information includes information for identifying the resource pool of the radio area # 1.
  • the radio resource information may include information indicating movement to the radio area # 1.
  • the transmission device 20-1 may execute processing for determining the radio resource used for D2D communication. In this case, the transmitting device 20-1 transmits wireless resource information to the wireless device 20-3 using the determined wireless resource.
  • the wireless device 20-3 receives the wireless resource information transmitted by the transmitting device 20-1. Then, the wireless device 20-3 transmits the wireless resource information to the receiving device 20-2 using the wireless resource selected from the resource pool of the wireless area # 1 (step S1002 in FIG. 20).
  • the radio resource information includes information for identifying the resource pool of radio area # 1 and information for identifying the transmitting device 20-1. Note that the radio resource information may include information indicating movement to the radio area # 1.
  • the receiving device 20-2 receives the wireless resource information transmitted by the wireless device 20-3. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 1.
  • the receiving device 20-2 controls the control signal and the data based on the portion corresponding to the resource pool outside the radio area in the period T1 before the time when the radio resource information is received from the group owner 20-3. Process the signal.
  • the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 1 in the period T2 after the time when the wireless resource information is received from the group owner 20-3. Process.
  • step S506 of FIG. 20 executes the process of step S506 of FIG. 20 in the same manner as step S506 of FIG.
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 1. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the process of step S1001 in FIG. 20 may include the same process as the process illustrated in FIG. 11 or the same process as the process illustrated in FIG. 12 except for the first and second differences.
  • the first difference is that the wireless device 20-3 receives a signal instead of the receiving device 20-2.
  • a second difference is that a resource pool outside the radio area is used instead of the radio area # 1.
  • step S1002 in FIG. 20 is the same as the process illustrated in FIG. 11 or illustrated in FIG. 12 except that the radio apparatus 20-3 transmits a signal instead of the transmission apparatus 20-1.
  • a process similar to the process may be included.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2, or may belong to the wireless area # 2.
  • the receiving device 20-2 may be located outside the wireless area. In this case, in the device detection process, each wireless device 20 may exchange information for identifying a resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless device 20-1 when the wireless device 20-1 moves from a position belonging to outside the wireless area to a position belonging to the wireless area # 1, the wireless device 20-1 uses wireless communication for D2D communication after the movement. Information indicating the resource is notified to the wireless device 20-2.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is performed by the group owner 20-3 that controls the D2D communication. According to this, the load on the radio device 20-1 or the base station 10 can be reduced as compared with the case where the notification is performed by the radio device 20-1 or the base station 10.
  • timing at which the transmitting device 20-1 belongs to the wireless area # 1 may be before the time when the process of step S1001 in FIG. 20 is executed, after the time, or at the time It may be at the same time.
  • the base station 10-1 may transmit the wireless resource information to the wireless device 20-3 instead of the transmitting device 20-1.
  • the base station 10-1 transmits the radio resource information to the radio device 20-3 as illustrated in FIG. 21 after executing the process of step S504 (step S1101 in FIG. 21).
  • the radio resource information includes information for identifying the resource pool of radio area # 1 and information for identifying the transmitting device 20-1.
  • the radio resource information may include information indicating movement to the radio area # 1.
  • the radio resource information may include information for identifying the receiving device 20-2.
  • the radio communication system 1 executes the processing from step 1002 onward in FIG. 21 as in the processing in FIG. According to this, the load on the wireless device 20-1 can be reduced as compared with the processing in FIG.
  • both the transmitting device 20-1 and the receiving device 20-2 belong to the wireless area 30-1.
  • the transmitting device 20-1 moves from the wireless area 30-1 to the wireless area 30-2.
  • the transmitting device 20-1 belongs to the wireless area 30-2, and the receiving device 20-2 belongs to the wireless area 30-1.
  • the transmitting device 20-1 belongs to the wireless area 30-1 (wireless area # 1) together with the receiving device 20-2.
  • Each of the transmitting device 20-1 and the receiving device 20-2 receives information identifying the resource pool of the wireless area # 1 from the base station 10-1.
  • the wireless communication system 1 executes the same processing as steps S101 to S106 in FIG. After execution of the process of step S106, as illustrated in FIG. 22, the base station 10-1 transmits the radio resource information to the receiving device 20-2 (step S1201 of FIG. 22).
  • the radio resource information includes information for identifying the resource pool of the radio area # 2 and information for identifying the transmitting device 20-1.
  • the radio resource information may include information indicating the implementation of HO for the radio area # 2.
  • the receiving device 20-2 receives the radio resource information transmitted by the base station 10-1. After receiving the radio resource information, the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the radio area # 2.
  • the receiving device 20-2 in the period T1 prior to the time when the radio resource information is received from the base station 10-1, is based on the control signal and the portion corresponding to the resource pool of the radio area # 1. Process the data signal. In addition, the receiving device 20-2 controls the control signal and the data signal based on the portion corresponding to the resource pool of the wireless area # 2 in the period T2 after the time when the wireless resource information is received from the base station 10-1. Process.
  • the wireless communication system 1 executes the processes of steps S108 to S109 of FIG. 22 in the same manner as steps S108 to S109 of FIG.
  • the receiving device 20-2 processes the control signal and the data signal based on the portion of the received signal corresponding to the resource pool of the wireless area # 2. Therefore, the receiving device 20-2 can process the control signal and the data signal transmitted by the transmitting device 20-1.
  • the receiving device 20-2 may belong to the wireless area # 2.
  • the base station 10-2 transmits radio resource information instead of the base station 10-1.
  • the receiving device 20-2 may receive information identifying the resource pool of the wireless area # 1 from the base station 10-2 when the D2D group is formed. Further, in this case, in the device detection process, each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the receiving device 20-2 may belong to a wireless area different from both the wireless area # 1 and the wireless area # 2.
  • the base station 10-1 or the base station 10-2 transmits the radio resource information to the base station 10 that forms the radio area to which the receiving device 20-2 belongs.
  • the base station 10 that forms the radio area to which the receiving device 20-2 belongs transmits radio resource information to the receiving device 20-2.
  • the receiving device 20-2 may receive information for identifying the resource pool of the wireless area # 1 from the base station 10 that forms the wireless area to which the own device 20-2 belongs. Further, in this case, in the device detection process, each wireless device 20 may exchange information identifying the resource pool used by itself 20 for signal transmission in D2D communication with another wireless device 20.
  • the wireless device 20-1 moves from the position belonging to the wireless area # 1 to the position belonging to the wireless area # 2, the wireless device 20-1 moves after the movement. 1 notifies the wireless device 20-2 of information indicating the wireless resource used for D2D communication.
  • the wireless device 20-2 can know the wireless resource that the wireless device 20-1 uses for D2D communication after movement. As a result, D2D communication can be executed even after the wireless device 20-1 moves.
  • the notification is executed by the base station 10-1. According to this, the load on the wireless device 20 can be reduced as compared with the case where the notification is performed by the wireless device 20.
  • the wireless communication system 1 may execute processing in which the order in which step S106 and step S1201 in FIG.
  • the wireless communication system 1 is a D2D between the first wireless device 20 belonging to a certain wireless area and the second wireless device 20 not belonging to the wireless area. Schedule radio resources used for communication.
  • the D2D group exists over the radio area and the radio area, or over a plurality of radio areas, compared to the radio communication system according to the first embodiment.
  • a common resource pool is used.
  • this difference will be mainly described.
  • symbol used in 1st Embodiment is the same or substantially the same.
  • the wireless communication system 1 according to the second embodiment has a function corresponding to any one of the operation examples to be described later, or any combination, instead of the function corresponding to the operation example according to the first embodiment.
  • the base station 10-1 forms the wireless area 30-1 and the base station 10-2 forms the wireless area 30-2.
  • the wireless area 30-1 and the wireless area 30-2 are represented as a wireless area # 1 and a wireless area # 2, respectively.
  • the wireless communication system 1 sets a first resource pool for the wireless area 30-1, and sets a second resource pool different from the first resource pool for the wireless area 30-2. Further, the wireless communication system 1 sets a plurality of different resource pools in a plurality of other wireless areas (not shown).
  • the wireless communication system 1 sets a resource pool different from the resource pool set for each wireless area outside the wireless area.
  • Outside the wireless area is an area formed by a position where the wireless device 20 does not belong to any wireless area, which is formed by the wireless communication system 1 (in this example, the base station 10).
  • the resource pool set for each wireless area may be represented as the resource pool for that wireless area. Further, the resource pool set for the outside of the radio area may be represented as a resource pool outside the radio area.
  • Each wireless device 20 may hold in advance information for identifying a resource pool outside the wireless area. Each wireless device 20 may receive information for identifying a resource pool outside the wireless area from the base station 10 that forms the wireless area to which the wireless device 20 belongs.
  • the state of the wireless communication system 1 is the state illustrated in FIG.
  • the wireless device 20-1 belongs to the wireless area 30-1, and the wireless device 20-2 belongs to the wireless area 30-2.
  • the wireless device 20-1 is a group owner
  • the wireless device 20-2 is a group member.
  • the group owner and the group member do not have to be determined.
  • the base station 10-1 determines whether or not the group owner 20 in the D2D group belongs to the radio area formed by the own station 10-1 for the D2D group. For example, when the base station 10-1 receives predetermined information transmitted by the group owner 20, the base station 10-1 may determine that the group owner 20 belongs to a radio area formed by the own station 10-1.
  • the predetermined information transmitted by the group owner 20 may be an allocation request for requesting allocation of a resource pool.
  • the base station 10-1 may determine that the group owner 20 belongs to the wireless area formed by the own station 10-1. .
  • the base station 10-1 determines that the group owner 20-1 belongs to the wireless area # 1 formed by the own station 10-1. Then, the base station 10-1 determines the resource pool of the radio area # 1 as a candidate for radio resources used for D2D communication in the D2D group formed by the group owner 20-1 (step S1301 in FIG. 24).
  • the base station 10-1 transmits pool allocation information to each of the wireless device 20-1 and the base station 10-2 (step S1302 in FIG. 24).
  • the pool allocation information includes information for identifying the resource pool of the wireless area # 1.
  • the wireless device 20 receives information indicating a resource block used as a resource pool from the base station 10-1 as information for identifying the resource pool of the wireless area # 1.
  • the information indicating the resource block may include information indicating the subframe.
  • wireless apparatus 20 may identify the resource pool of the radio
  • the identifier for identifying the wireless area is an example of information for identifying the resource pool of the wireless area.
  • the pool allocation information may include information for identifying the D2D group.
  • the base station 10-1 when the base station 10-1 receives information for identifying the base station 10 that forms a radio area to which the radio equipment 20 forming the D2D group belongs and is different from the base station 10-1, the base station 10-1 is identified by the information. Pool allocation information may be transmitted to each of the base stations 10. Information identifying a base station 10 different from the own station 10-1 that forms a wireless area to which the wireless device 20 forming the D2D group belongs may be transmitted by the group owner 20 or the base station 10, for example. Further, the base station 10-1 may transmit the pool allocation information to a preset peripheral base station 10 (for example, a base station 10 that forms a radio area adjacent to or overlapping with the radio area # 1).
  • a preset peripheral base station 10 for example, a base station 10 that forms a radio area adjacent to or overlapping with the radio area # 1).
  • each of the wireless device 20-1 and the base station 10-2 receives the pool allocation information from the base station 10-1. Then, the base station 10-2 transmits pool allocation information to the wireless device 20-2 (step S1303 in FIG. 24). As a result, the wireless device 20-2 receives the pool allocation information from the base station 10-2.
  • the wireless devices 20-1 and 20-2 perform D2D communication based on the resource pool (in this example, the resource pool of the wireless area # 1) identified by the received pool allocation information (step S1304 in FIG. 24). ).
  • each of the wireless devices 20-1 and 20-2 transmits a control signal and a data signal in the D2D communication using the wireless resource selected from the resource pool of the wireless area # 1.
  • each of the wireless devices 20-1 and 20-2 processes a control signal and a data signal based on a portion of the received signal corresponding to the resource pool of the wireless area # 1. Accordingly, the wireless devices 20-1 and 20-2 can process control signals and data signals transmitted by the other wireless devices 20-2 and 20-1, respectively.
  • the process of step S1304 in FIG. 24 may include the process illustrated in FIG.
  • the processing in steps S201 to S205 in FIG. 25 is the same as the processing in steps S201 to S205 in FIG.
  • the process of FIG. 25 includes processes of steps S206 to S210 subsequent to the process of step S205.
  • the processing in steps S206 to S210 in FIG. 25 is performed by the base station 10-2 instead of the base station 10-1, and by the wireless device 20-2 instead of the wireless device 20-1. Except for this point, the processing is the same as the processing in steps S201 to S205.
  • step S210 of FIG. 25 the processes of steps S201 to S210 of FIG. 25 may be repeatedly executed.
  • steps S203 to S205 and S208 to S210 of FIG. 25 may be repeatedly executed.
  • the control signal may not include allocation information.
  • the processes of steps S204 to S205 and S209 to S210 of FIG. 25 may be repeatedly executed.
  • the control signal since the MCS does not change, the control signal may not include the MCS information.
  • the control signal when the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information. In this case, transmission of the control signal may not be executed.
  • the processes of steps S205 and S210 of FIG. 25 may be repeatedly executed.
  • the process of step S1304 in FIG. 24 may include the process illustrated in FIG. 26 instead of the process shown in FIG. 25 or in addition to the process shown in FIG.
  • the processing in steps S301 to S304 in FIG. 26 is the same as the processing in steps S301 to S304 in FIG.
  • the process of FIG. 26 includes processes of steps S305 to S308 subsequent to the process of step S304.
  • the processing in steps S305 to S308 in FIG. 26 is the same as the processing in steps S301 to S304 except that the wireless device 20-2 executes the processing instead of the wireless device 20-1.
  • steps S301 to S308 in FIG. 26 may be repeatedly executed after execution of the processing in step S308 in FIG.
  • the processes in steps S302 to S304 and S306 to S308 in FIG. 26 may be repeatedly executed.
  • the control signal may not include allocation information.
  • the processes of steps S303 to S304 and S307 to S308 in FIG. 26 may be repeatedly executed.
  • the control signal since the MCS does not change, the control signal may not include the MCS information.
  • the control signal when the radio resource allocated for data signal transmission does not change, the control signal may not include allocation information. In this case, transmission of the control signal may not be executed.
  • the processes of steps S304 and S308 of FIG. 26 may be repeatedly executed.
  • the group owner 20-1 may transmit pool allocation information to the group member 20-2 instead of the base station 10-2.
  • the base station 10-1 transmits the pool allocation information to the wireless device 20-1 after executing the process of step S1301 similar to that of FIG. 24 (step S1401 of FIG. 27). ).
  • the wireless device 20-1 receives the pool allocation information from the base station 10-1. Then, the wireless device 20-1 transmits pool allocation information to the wireless device 20-2 (step S1402 in FIG. 27). For example, the wireless device 20-1 may transmit pool allocation information using a wireless resource used for transmitting a discovery signal in the device detection process. As a result, the wireless device 20-2 receives the pool allocation information from the base station 10-2. Thereafter, the wireless communication system 1 executes the process of step S1304 similar to FIG.
  • the base station 10-1 has a D2D group formed by the wireless device 20-1 belonging to the wireless area # 1 and the wireless device 20-2 belonging to the wireless area # 2.
  • the resource pool of radio area # 1 is used as a candidate for the radio resource to be used.
  • the resource pool of the wireless area # 1 is an example of a first resource candidate that is a candidate for a wireless resource used for D2D communication when a plurality of wireless devices 20 belong to the wireless area # 1.
  • the resource pool of the wireless area # 1 is used in common by the wireless device 20-1 and the wireless device 20-2 that form the D2D group.
  • D2D communication can be executed between the wireless device 20-1 and the wireless device 20-2.
  • the wireless area # 1 it is possible to suppress the interference of the wireless signals between the D2D communication and the communication different from the D2D communication (for example, indirect communication).
  • candidates for radio resources used for D2D communication performed between the radio device 20-1 and the radio device 20-2 are in the radio area # 1 to which the radio device 20-1 as the group owner belongs. To be determined.
  • the determination of the radio resource candidate based on the radio area # 1 to which the radio device 20-1 belongs is an example of determining the radio resource candidate based on the position of the radio device 20-1.
  • the plurality of wireless devices 20 forming the D2D group are likely to concentrate in the vicinity of the wireless device 20 that is the group owner that controls the D2D communication.
  • candidates for radio resources used for D2D communication are determined based on the position of the radio device 20-1 as the group owner. Therefore, it is possible to increase the number of wireless devices 20 that are relatively small in the degree of interference between wireless signals between D2D communication and communication different from D2D communication.
  • the radio communication system 1 may use a radio resource common to a resource pool of a plurality of radio areas to which the radio equipment 20 forming the D2D group belongs as a radio resource candidate used by the D2D group.
  • a radio resource common to resource pools in a plurality of radio areas to which the radio devices 20 forming the D2D group belong may be represented as a common resource pool.
  • the base station 10-2 transmits pool information to the base station 10-1 (step S1501 in FIG. 28).
  • the pool information includes information for identifying the resource pool of the wireless area # 2.
  • the base station 10-1 receives the pool information from the base station 10-2. Then, the base station 10-1 uses the common resource pool as a candidate for the radio resource used by the D2D group or D2D pair instead of the resource pool of the radio area # 1, and is similar to step S1301 in FIG. The process of step S1502 in FIG. 28 is executed.
  • the base station 10-1 uses a common resource based on pool information received from each of the base stations 10 different from the own station 10-1 that forms a wireless area to which the wireless devices 20 forming the D2D group or D2D pair belong.
  • a pool may be determined.
  • the base station 10-1 uses the group owner 20 or the base station to identify information identifying the base station 10 that is different from the local station 10-1 that forms the wireless area to which the wireless device 20 that forms the D2D group or D2D pair belongs 10 may be received.
  • the base station 10-1 uses a common resource pool based on pool information received from a preset peripheral base station 10 (for example, a base station 10 that forms a wireless area adjacent to or overlapping with the wireless area # 1). May be determined. Thereafter, the wireless communication system 1 executes the processing of steps S1302 to S1304 similar to FIG.
  • the common resource pool is used as a candidate for the radio resource used for the D2D communication performed between the radio device 20-1 and the radio device 20-2.
  • the common resource pool is a radio resource common to the resource pool of the radio area # 1 and the resource pool of the radio area # 2.
  • the resource pool of wireless area # 2 is an example of wireless resource candidates used for D2D communication when a plurality of wireless devices 20 do not belong to wireless area # 1 (in this example, belong to wireless area # 2).
  • the base station 10-2 may determine the resource pool instead of the base station 10-1.
  • the group owner 20-1 may transmit the pool allocation information to the group member 20-2 instead of the base station 10-2.
  • the state of the wireless communication system 1 is the state illustrated in FIG. In the state illustrated in FIG. 29, the wireless device 20-1 belongs to the wireless area 30-1, and the wireless device 20-2 is located outside the wireless area.
  • the wireless device 20-1 determines whether the other wireless device 20 detected in the device detection process is located outside the wireless area. For example, the wireless device 20-1 may receive information indicating that the detected other wireless device 20 is located outside the wireless area. For example, information indicating that the detected other wireless device 20 is located outside the wireless area may be received from the detected other wireless device 20 in the device detection process. Further, information indicating that the detected other wireless device 20 is located outside the wireless area may be received from the base station 10-1.
  • the wireless device 20-1 determines that the wireless device 20-2 detected in the device detection process is located outside the wireless area.
  • the radio device 20-1 determines a resource pool outside the radio area as a candidate for radio resources used for D2D communication in the D2D group or D2D pair formed by the own station 20-1 (step in FIG. 30). S1601).
  • the determination of the resource pool may be expressed as setting of the resource pool.
  • the wireless devices 20-1 and 20-2 perform D2D communication based on the resource pool outside the wireless area (step S1602 in FIG. 30).
  • each of the wireless devices 20-1 and 20-2 transmits a control signal and a data signal in the D2D communication using the wireless resource selected from the resource pool outside the wireless area.
  • each of the wireless devices 20-1 and 20-2 processes a control signal and a data signal based on a portion of the received signal corresponding to a resource pool outside the wireless area. Accordingly, the wireless devices 20-1 and 20-2 can process control signals and data signals transmitted by the other wireless devices 20-2 and 20-1, respectively.
  • step S1602 in FIG. 30 may include the same process as the process illustrated in FIG. 26 except that a resource pool outside the radio area is used instead of the radio area # 1.
  • the wireless device 20-1 may notify the base station 10-1 that a resource pool outside the wireless area is used for D2D communication.
  • the radio device 20-1 may perform D2D communication by using the radio resource selected from the resource pool outside the radio area by the base station 10-1.
  • the process in step S1602 uses a process in which steps S301 to S304 in FIG. 26 are replaced with processes in steps S201 to S205 in FIG. 25, and a resource pool outside the radio area is used instead of radio area # 1.
  • a similar process may be included except for the points described above.
  • the base station 10-1 includes the D2D group or D2D formed by the wireless device 20-1 belonging to the wireless area # 1 and the wireless device 20-2 belonging to the outside of the wireless area.
  • a resource pool outside the radio area is used as a radio resource candidate used by the pair.
  • the resource pool outside the radio area is a second resource candidate that is a candidate for radio resources used for D2D communication when the plurality of radio devices 20 do not belong to radio area # 1 (in this example, located outside the radio area). It is an example.
  • the resource pool outside the wireless area is used in common by the wireless device 20-1 and the wireless device 20-2 forming the D2D group or D2D pair.
  • D2D communication can be executed between the wireless device 20-1 and the wireless device 20-2.
  • the wireless area # 1 it is possible to suppress the interference of the wireless signals between the D2D communication and the communication different from the D2D communication (for example, indirect communication).
  • the wireless communication system 1 has a D2D between the first wireless device 20 belonging to a certain wireless area and the second wireless device 20 not belonging to the wireless area.
  • Schedule radio resources used for communication are a D2D between the first wireless device 20 belonging to a certain wireless area and the second wireless device 20 not belonging to the wireless area.
  • the D2D group exists over the radio area and the radio area, or over a plurality of radio areas, compared to the radio communication system according to the first embodiment. It is different in determining whether or not.
  • this difference will be mainly described.
  • symbol used in 1st Embodiment is the same or substantially the same.
  • the wireless communication system 1 according to the third embodiment has a function corresponding to any one of the operation examples to be described later, or any combination, instead of the function corresponding to the operation example according to the first embodiment.
  • the base station 10-1 forms the wireless area 30-1 and the base station 10-2 forms the wireless area 30-2.
  • the wireless area 30-1 and the wireless area 30-2 are represented as a wireless area # 1 and a wireless area # 2, respectively.
  • the wireless device 20-1 is a group owner
  • the wireless device 20-2 is a group member.
  • the group owner and the group member do not have to be determined.
  • the wireless device 20 transmits the area information to the group owner 20 of the D2D group.
  • the area information includes information for identifying the wireless area when the wireless device 20 belongs to the wireless area. Further, in this example, the area information includes information indicating that the wireless device 20 is located outside the wireless area when the wireless device 20 is located outside the wireless area.
  • the area information may be transmitted when the wireless device 20 participates in the D2D group. Participation in the D2D group may be performed when the wireless device 20 requests participation in the D2D group. In addition, participation in the D2D group may be performed when a request for participation in the D2D group is received from another wireless device 20.
  • participation in the D2D group is realized when the wireless device 20 transmits a participation request to the group owner 20 of the D2D group, and the group owner 20 transmits a permission response to the wireless device 20 in response to the participation request. It's okay.
  • the area information may be transmitted when a process for determining a radio resource used by the group member 20 for D2D communication with the group owner 20 is executed.
  • the wireless device 20-2 transmits area information to the wireless device 20-1 (step S1701 in FIG. 31).
  • the wireless device 20-1 receives the area information from the wireless device 20-2.
  • the wireless device 20-1 determines which of the first to third states of the D2D group is based on the area information received from the wireless device 20-2 (step S1702 in FIG. 31). .
  • the first state is a state in which all of the group members 20 forming the D2D group belong to the same wireless area as the group owner 20.
  • the first state is a state in which all of the plurality of wireless devices 20 forming the D2D group belong to one wireless area. That all of the plurality of wireless devices 20 forming the D2D group belong to one wireless area may be expressed as that the D2D group is included in one wireless area.
  • the second state is a state in which at least one of the group members 20 forming the D2D group belongs to a radio area different from that of the group owner 20.
  • the second state is a state in which the plurality of wireless devices 20 forming the D2D group belong to a plurality of wireless areas.
  • the fact that the plurality of wireless devices 20 forming the D2D group belong to a plurality of wireless areas may be expressed as the D2D group extending over the plurality of wireless areas.
  • the third state is a state in which at least one of the group members 20 forming the D2D group is located outside the wireless area.
  • a part of the plurality of wireless devices 20 forming the D2D group belongs to at least one wireless area, and the remaining wireless devices 20 forming the D2D group are out of the wireless area. It is a state located in.
  • the fact that a part of the plurality of wireless devices 20 forming the D2D group belongs to at least one wireless area and the remainder of the plurality of wireless devices 20 forming the D2D group is located outside the wireless area is the D2D group May be described as straddling the inside and outside of the coverage.
  • the wireless device 20-1 determines that the state of the D2D group is the second state. Then, the wireless device 20-1 transmits the group status information to the base station 10-1 (step S1703 in FIG. 31).
  • the group status information represents the status of the D2D group formed by the wireless device 20-1.
  • the group state information indicates that the state of the D2D group formed by the wireless device 20-1 is the second state.
  • the group status information may include information indicating that the wireless device 20-1 is a group owner.
  • the base station 10-1 receives the group status information from the wireless device 20-1.
  • the base station 10-1 may control scheduling of radio resources used for D2D communication based on the received group state information. For example, the base station 10-1 may change the resource pool used for D2D communication based on the received group state information. Further, for example, the base station 10-1 may change the amount of radio resources included in the resource pool used for D2D communication based on the received group state information.
  • the amount of radio resources may be, for example, the number of resource blocks or the frequency bandwidth.
  • the wireless device 20-2 may be located outside the wireless area.
  • the wireless communication system 1 operates in the same manner as described above except that the state of the D2D group is determined to be the third state instead of the second state.
  • the wireless device 20-1 includes a plurality of wireless devices 20 included in the D2D group formed by itself 20-1 and the wireless device 20 belonging to the wireless area # 1, and the wireless area # 1. It is determined whether or not both of the wireless devices 20 that do not belong to 1 are included.
  • the fact that the plurality of wireless devices 20 included in the D2D group includes both the wireless devices 20 belonging to the wireless area # 1 and the wireless devices 20 not belonging to the wireless area # 1 means that the D2D group includes a plurality of wireless devices. Represents straddling an area or straddling coverage.
  • each of the group members 20-2 notifies the group owner 20-1 of area information indicating whether or not it belongs to the wireless area.
  • the group owner 20-1 makes the above determination based on the received area information.
  • the plurality of wireless devices 20 forming the D2D group include both the first wireless device 20 that belongs to the wireless area # 1 and the second wireless device 20 that does not belong to the wireless area # 1. It can be determined with high accuracy.
  • the wireless devices 20-1 and 20-2 form a D2D group.
  • a specific wireless device 20 is a group.
  • another wireless device 20 may notify the area information to an arbitrary wireless device 20 designated by the base station 10.
  • the wireless device 20-1 transmits position information indicating the position of itself 20-1 to the base station 10-1 (step S1801 in FIG. 32).
  • the position information may be acquired based on GPS (Global Positioning System).
  • GPS Global Positioning System
  • the location information may be acquired based on a radio signal received from the base station 10.
  • the position information may be acquired based on one or both of a delay time that occurs with propagation of a radio signal and a received power of the radio signal.
  • the base station 10-1 receives the position information from the wireless device 20-1. Then, the base station 10-1 determines which of the first to third states of the D2D group is based on the position information received from the wireless device 20-1 (step S1802 in FIG. 32). .
  • the base station 10-1 may hold in advance information indicating the positions of boundaries between a plurality of radio areas formed by the radio communication system 1. In this case, the base station 10-1 may make the above determination based on the stored information and the received position information.
  • the base station 10-1 determines that the state of the D2D group is the second state when the distance between the position indicated by the position information and the boundary between the wireless areas is smaller than a predetermined threshold. It's okay. In addition, when the distance between the position indicated by the position information and the boundary between the wireless area and the outside of the wireless area is smaller than a predetermined threshold, the base station 10-1 determines that the state of the D2D group is the third state. You may determine that there is. Also, the base station 10-1 may determine that the state of the D2D group is the first state when the state of the D2D group is not determined to be the second state or the third state.
  • the base station 10-1 may control scheduling of radio resources used for D2D communication based on the determination result. For example, the base station 10-1 may change the resource pool used for D2D communication based on the determination result. Further, for example, the base station 10-1 may change the amount of radio resources included in the resource pool used for D2D communication based on the determination result.
  • the wireless device 20-1 includes a plurality of wireless devices 20 included in the D2D group formed by itself 20-1 and the wireless device 20 belonging to the wireless area # 1, and the wireless area # 1. It is determined whether or not both of the wireless devices 20 that do not belong to 1 are included.
  • the above determination is performed based on the position of the group owner 20-1 among the plurality of wireless devices 20 forming the D2D group.
  • the plurality of wireless devices 20 forming the D2D group are easily concentrated in the vicinity of the group owner 20. Therefore, according to the wireless communication system 1, the plurality of wireless devices 20 forming the D2D group include the first wireless device 20 belonging to the wireless area # 1 and the second wireless device 20 not belonging to the wireless area # 1. Whether or not both are included can be determined with high accuracy. Further, the load on each wireless device 20 can be reduced as compared with the case where each group member 20 notifies the group owner 20.
  • the radio equipment 20-1 has the quality of radio signals received from the base station 10-1 and the surrounding base stations 10 (for example, the base station 10 that forms a radio area adjacent to or overlapping the radio area # 1). Measure.
  • the quality may be represented by CQI, RSRP, SINR, RSRQ, or the like.
  • the wireless device 20-1 transmits a measurement report including information indicating the quality measured for each of the base station 10-1 and the surrounding base stations 10 to the base station 10-1 (FIG. 33). Step S1901).
  • the base station 10-1 receives the measurement report from the wireless device 20-1. Then, the base station 10-1 determines which of the first to third states of the D2D group is based on the measurement report received from the wireless device 20-1 (step S1902 in FIG. 33). .
  • the base station 10-1 may make the above determination based on the received power of the radio signal. For example, when the difference between the received power for the wireless area # 1 and the received power for a wireless area different from the wireless area # 1 is equal to or smaller than a predetermined threshold, the base station 10-1 determines that the state of the D2D group is the second You may determine that it is in a state.
  • the group owner 20-1 is located in the vicinity of the boundary between the wireless area # 1 and the other wireless areas. Therefore, whether or not the plurality of wireless devices 20 forming the D2D group includes both the first wireless device 20 belonging to the wireless area # 1 and the second wireless device 20 belonging to another wireless area. Judgment can be made with high accuracy.
  • the base station 10-1 receives power for the wireless area # 1 that is less than or equal to the first threshold value and that receives power for a wireless area that is different from the wireless area # 1 is less than or equal to the second threshold value that is less than the first threshold value In some cases, it may be determined that the state of the D2D group is the third state.
  • the group owner 20-1 is located in the vicinity of the boundary between the wireless area # 1 and the outside of the wireless area. Therefore, whether or not the plurality of wireless devices 20 forming the D2D group includes both the first wireless device 20 belonging to the wireless area # 1 and the second wireless device 20 located outside the wireless area. Judgment can be made with high accuracy.
  • the base station 10-1 may determine that the state of the D2D group is the first state.
  • the base station 10-1 may control scheduling of radio resources used for D2D communication based on the determination result. For example, the base station 10-1 may change the resource pool used for D2D communication based on the determination result. Further, for example, the base station 10-1 may change the amount of radio resources included in the resource pool used for D2D communication based on the determination result.
  • the wireless device 20-1 includes a plurality of wireless devices 20 included in the D2D group formed by itself 20-1 and the wireless device 20 belonging to the wireless area # 1, and the wireless area # 1. It is determined whether or not both of the wireless devices 20 that do not belong to 1 are included.
  • the determination is made based on the reception power of the radio signal from the base station 10 in the group owner 20-1 among the plurality of radio devices 20 forming the D2D group.
  • the plurality of wireless devices 20 forming the D2D group are easily concentrated in the vicinity of the group owner 20. Therefore, according to the wireless communication system 1, the plurality of wireless devices 20 forming the D2D group include the first wireless device 20 belonging to the wireless area # 1 and the second wireless device 20 not belonging to the wireless area # 1. Whether or not both are included can be determined with high accuracy. Further, the load on each wireless device 20 can be reduced as compared with the case where each group member 20 notifies the group owner 20.
  • the plurality of wireless devices 20 includes the first wireless device 20 belonging to the wireless area # 1 formed by the base station 10 and the wireless area #. It is determined whether or not both of the second wireless devices 20 that do not belong to 1 are included.
  • a radio communication system according to the fourth embodiment of the present invention is described.
  • the wireless communication system according to the fourth embodiment is different from the wireless communication system according to the third embodiment in that the resource pool according to the second embodiment is set after the determination.
  • this difference will be mainly described.
  • symbol used in 3rd Embodiment is the same or substantially the same.
  • the wireless communication system 1 according to the fourth embodiment has a function corresponding to the operation example according to the second embodiment in addition to the function corresponding to the operation example according to the third embodiment.
  • the wireless communication system 1 executes any one of the processes shown in FIGS. 31, 33, and then executes any one of the processes shown in FIGS. 24, 27, 28, and 30.
  • the base station 10-1 determines that the state of the D2D group is the second state by executing any one of the processes in FIGS. 31 to 33, the base station 10-1, FIGS. Execute one of the processes.
  • the base station 10-1 determines that the state of the D2D group is the third state by executing one of the processes of FIGS. 31 to 33, the base station 10-1 executes the process of FIG. In this case, the base station 10-1 may notify the transmitting device 20-1 of the state of the D2D group.
  • the wireless communication system 1 according to the fourth embodiment can exhibit the same operations and effects as the wireless communication system 1 according to the second and third embodiments.

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

Abstract

Ce système (1) de transmission radio comprend une station de base (10), un premier dispositif radio (20) qui fait partie d'une zone radio desservie par ladite station de base (10), et une unité de commande. L'unité de commande effectue une planification pour les éléments suivants : un second dispositif radio (20) qui effectue une communication de dispositif à dispositif avec le premier dispositif radio (20) sans faire partie de la zone radio susmentionnée ; et une ressource radio qui est utilisée dans ladite communication de dispositif à dispositif.
PCT/JP2014/067843 2014-07-03 2014-07-03 Système de transmission radio, dispositif radio, station de base, procédé de commande de dispositif radio, et procédé de commande de station de base WO2016002060A1 (fr)

Priority Applications (1)

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PCT/JP2014/067843 WO2016002060A1 (fr) 2014-07-03 2014-07-03 Système de transmission radio, dispositif radio, station de base, procédé de commande de dispositif radio, et procédé de commande de station de base

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PCT/JP2014/067843 WO2016002060A1 (fr) 2014-07-03 2014-07-03 Système de transmission radio, dispositif radio, station de base, procédé de commande de dispositif radio, et procédé de commande de station de base

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JP2020010413A (ja) * 2016-01-08 2020-01-16 富士通株式会社 無線通信装置、無線通信システムおよび処理方法
WO2017195862A1 (fr) * 2016-05-13 2017-11-16 京セラ株式会社 Station de base et terminal d'utilisateur
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JP2019135859A (ja) * 2016-05-13 2019-08-15 京セラ株式会社 基地局及びユーザ端末
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WO2018030158A1 (fr) * 2016-08-09 2018-02-15 ソニー株式会社 Dispositif de communication, procédé de communication, et programme
CN110024440A (zh) * 2016-08-09 2019-07-16 索尼公司 通信设备、通信方法和程序
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JP7235085B2 (ja) 2019-10-21 2023-03-08 富士通株式会社 無線通信装置、無線通信システムおよび処理方法

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