WO2018047432A1 - Dispositif de communication, procédé de commande, et programme de commande - Google Patents

Dispositif de communication, procédé de commande, et programme de commande Download PDF

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Publication number
WO2018047432A1
WO2018047432A1 PCT/JP2017/022281 JP2017022281W WO2018047432A1 WO 2018047432 A1 WO2018047432 A1 WO 2018047432A1 JP 2017022281 W JP2017022281 W JP 2017022281W WO 2018047432 A1 WO2018047432 A1 WO 2018047432A1
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WIPO (PCT)
Prior art keywords
information
terminal
time
transmission
reference time
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PCT/JP2017/022281
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English (en)
Japanese (ja)
Inventor
俊平 布施
下鍋　忠
二寛 青木
重人 鈴木
賢一 飯島
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シャープ株式会社
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Publication of WO2018047432A1 publication Critical patent/WO2018047432A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates to a communication terminal, a control method in a communication relay terminal, and a control program for controlling the communication terminal.
  • Patent Document 1 discloses a method for transmitting event occurrence information in which event occurrence information is transmitted to a master station while relaying a plurality of slave stations as such information transmission method. Is disclosed.
  • Patent Document 1 when broadcasting is defined as transmitting information on radio waves without specifying the other party, event occurrence information is relayed between slave stations by broadcasting. Broadcasting transmits information unidirectionally and does not require identification of a receiving party. In Patent Document 1, such a transmission method has a high degree of freedom in arrangement and attempts to achieve a relatively free change in the layout of the information transmission network.
  • Patent Document 1 has the following problems.
  • a plurality of communication terminals receive information transmitted from one communication terminal, each of the plurality of communication terminals simultaneously broadcasts the information. Therefore, radio wave interference occurs at a position where the broadcast information (that is, radio wave) arrives at the same time. Therefore, there is a possibility that the terminal at such a position cannot receive information correctly.
  • the present invention has been made in view of the above problems, and an object thereof is to provide a communication terminal, a control method, and a control program that enable a relay destination terminal to correctly receive information. .
  • the communication terminal includes a communication unit and a control unit for controlling the communication unit.
  • the control unit broadcasts a response request signal including the terminal identifier of the terminal itself and the information identifier of the received information.
  • the control unit receives a response signal corresponding to the notified response request signal within a predetermined period after notifying the response request signal, and receives a response signal corresponding to the response request signal notified by another terminal The information is notified through the communication unit on the condition that it is not.
  • a communication terminal that is in a position where radio waves simultaneously reach from two or more other communication terminals and that has received a response request signal from each of the two or more other communication terminals receives first.
  • By notifying only the response signal for the received response request signal it is determined which communication terminal of the other two or more communication terminals is requested to transmit information from the other two or more communication terminals. Can be transmitted to all of them simultaneously.
  • FIG. 10 is a sequence chart showing a part of another processing example in a case where a terminal that has received a busy state notification retransmits a call availability confirmation signal after a certain period of time has elapsed after receiving a busy state notification. It is a sequence chart for demonstrating the process performed following the process example of FIG. 18A. It is a sequence chart for demonstrating the flow of a process when a time stamp is included in information. It is a flowchart for demonstrating the flow of a reception process of the mobile terminal which is functioning as a relay terminal. It is a flowchart for demonstrating the flow of the transmission process of the mobile terminal which is functioning as a relay terminal.
  • FIG. 1 is a diagram for explaining a configuration example of a communication system 900.
  • a communication system 900 includes a plurality of communication terminals 100, 100A to 100F in one aspect.
  • Each communication terminal 100, 100A to 100F is a mobile terminal (UE: User Equipment).
  • Each communication terminal 100, 100A to 100F has a function of communicating directly with another communication terminal by inter-terminal communication (D2D (Device to Device) communication) in addition to a function of communicating with another communication terminal via a base station (not shown).
  • D2D Device to Device
  • Each communication terminal 100, 100A to 100F realizes group communication (hereinafter also referred to as “inter-terminal group communication”) by inter-terminal communication.
  • the inter-terminal communication includes direct inter-terminal communication using Wi-Fi (Wi-Fi Direct) and other inter-terminal direct communication using wireless such as Bluetooth (registered trademark).
  • Each of the communication terminals 100, 100A to 100F may be any of a terminal that transmits information (also referred to as “information transmitting terminal” or “source”), a relay terminal that relays information, and a terminal that is a destination of information. Can function.
  • the information includes a terminal ID (Identification) and an information ID (Identification), which will be described later, in addition to a message that is the main transmission purpose.
  • a message is included in these information. Shall be included.
  • the communication terminal 100 functions as an information transmission terminal.
  • Communication terminals 100A, 100B, and 100F function as relay terminals.
  • Communication terminals 100C, 100D, and 100E are information transmission destination terminals.
  • Communication terminals 100C, 100D, and 100E may function as relay terminals, and information may be further relayed to communication terminals (not shown) in the group.
  • FIG. 2 is a block diagram for explaining the functional configuration and hardware configuration of the communication terminal 100.
  • communication terminal 100 includes a control unit 110, a storage unit 120, a communication unit 130, a reception antenna 140, and a transmission antenna 150.
  • the control unit 110 includes a comparison unit 111 and a communication control unit 112.
  • the storage unit 120 includes a terminal ID storage unit 121 and an information ID storage unit 122.
  • the communication unit 130 includes a reception unit 131 and a transmission unit 132.
  • the storage unit 120 stores an operating system, various application programs, and various data.
  • the terminal ID storage unit 121 stores an ID of a transmission source of received information (hereinafter also referred to as “terminal ID”).
  • the information ID storage unit 122 stores the ID of the received information (hereinafter also referred to as “information ID”).
  • the control unit 110 controls the overall operation of the communication terminal 100.
  • the comparison unit 111 compares both information (terminal ID, information ID) stored in the terminal ID storage unit 121 and the information ID storage unit with the terminal ID and information ID for the newly received information.
  • the communication control unit 112 controls communication with other communication terminals using the comparison result by the comparison unit 111. Details of the processing of the control unit 110 including communication control will be described in each embodiment described later.
  • the communication unit 130 executes data processing for performing communication with other communication terminals.
  • the reception unit 131 receives information from the communication terminals included in the group using the reception antenna 140.
  • the receiving unit 131 receives information from the base station using the receiving antenna 140 when performing normal communication via the base station.
  • the transmission unit 132 transmits (transmits) information to the communication terminals included in the group using the transmission antenna 150.
  • the transmission unit 132 performs information transmission processing and information relay processing.
  • the transmission unit 132 transmits information to the base station using the transmission antenna 150.
  • the control unit 110 is realized by a processor such as a CPU executing an operating system and application programs.
  • the storage unit 120 is a memory.
  • the storage unit 120 is configured by ROM (Read Only Memory), RAM (Random Access Memory), flash memory, and the like.
  • the communication unit 130 is a communication IF (InterFace).
  • the communication unit 130 typically includes a baseband circuit and an RF circuit.
  • each of the communication terminals 100A to 100F has the same configuration as that of the communication terminal 100, and therefore, the configuration of each of the communication terminals 100A to 100F will not be described repeatedly.
  • any one of the plurality of communication terminals 100A to 100F functions as an information transmission terminal (terminal that transmits information) and at least one communication terminal functions as a relay terminal will be described.
  • reference numerals different from those of the communication terminals 100A to 100F are given to the information transmission terminal and the relay terminal.
  • the communication terminal is also simply referred to as “terminal”.
  • “frequency” is not limited to one value, but represents a band.
  • information including a terminal ID and an information ID is also referred to as “data”. Such transmission of information is also referred to as “data transmission”.
  • information (data) including a transmission necessity confirmation signal, a transmission necessity confirmation signal, a transmission necessity confirmation signal, a transmission possibility confirmation signal, a terminal ID and an information ID is multicast or Originated and received by broadcast.
  • Information (data) including the terminal ID and the information ID may be transmitted (specifically transmitted) and received by multicast or broadcast, or transmitted (specifically transmitted) and received by unicast. Good.
  • a terminal that transmits information determines the current time as a reference time T0.
  • the terminal that transmits the information has its own terminal at a random timing from the reference time T0 until the time Ta elapses (at an arbitrary timing from the reference time T0 until the time Ta elapses).
  • a transmission necessity confirmation signal including the terminal ID, the information ID, and the reference time T0 is transmitted.
  • the terminal that has received the transmission necessity confirmation signal has a random timing between the reference time T0 and the time Tb included in the transmission necessity confirmation signal (the time Tb is calculated from the reference time T0).
  • a transmission necessity response signal including the terminal ID and the information ID included in the transmission necessity confirmation signal is transmitted at an arbitrary timing until the time elapses.
  • the said terminal receives the said transmission necessity confirmation signal, when the terminal necessity confirmation signal which another terminal transmits before the time Tb passes from the reference time T0, the said terminal is later Nothing is done about the received transmission necessity confirmation signal.
  • the terminal that has received the call necessity response including the terminal ID of the own terminal before the time Tb elapses from the reference time T0 is the terminal ID of the own terminal at the timing when the time Tb elapses from the reference time T0. And information including the information ID is transmitted.
  • the terminal that has received the information sets the time after the elapse of time Tc from the reference time T0 as a new reference time T1. Thereafter, each terminal repeats the processes (b) to (e).
  • the frequency used for transmission / reception of the transmission necessity confirmation signal may be different from the frequency used for transmission / reception of information including the terminal ID and the information ID.
  • the call necessity response signal includes only the terminal ID and may not include the information ID, and the information may include only the information ID and may not include the terminal ID.
  • the information ID is explicitly included in the information. It may not be possible.
  • the current time is set as the reference time T0.
  • the reference time T0 is included in the transmission necessity confirmation signal to transmit the reference time information between terminals.
  • a rule may be introduced such that 0 second per minute is set as a reference time candidate, and a reference time candidate closest to the current time is set as a reference time, so that all terminals autonomously determine the reference time according to a clock.
  • the reference time in (a) above is used. For example, by introducing a rule that, for example, 0 second per minute is set as a reference time candidate and a reference time candidate closest to the current time is set as a reference time, the reference times of all information transmission terminals are synchronized. It is desirable to make it.
  • the terminal does not transmit a transmission necessity response signal when the information ID included in the transmission necessity confirmation signal is the same as the information ID of the information received in the past.
  • FIG. 3 is a sequence chart when relay terminal 1 relays information received from information transmission terminal 9.
  • information transmission terminal 9 transmits a transmission necessity confirmation signal including terminal ID9, information ID ⁇ , and reference time T0 of information transmission terminal 9 at random timing from time T0 until time Ta elapses. To do.
  • the random timing is determined, for example, by the terminal generating a random number or the like.
  • relay terminal 1 includes terminal ID 9 and information ID ⁇ of information transmitting terminal 9 at random timing after receiving the transmission necessity confirmation signal and after time Tb has elapsed from reference time T0. A transmission necessity response signal is transmitted.
  • the information transmission terminal 9 transmits information including the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at the timing of the reference time T0 + time Tb based on the reception of the transmission necessity response signal.
  • the relay terminal 2 includes the terminal ID1 and the information ID ⁇ of the relay terminal 1 at a random timing from the reference time T1 until the time Tb elapses after receiving the transmission necessity confirmation signal. A necessity response signal is transmitted. In sequence SQ1010, relay terminal 1 transmits information including terminal ID1 and information ID ⁇ of relay terminal 1 at the timing of reference time T1 + time Tb based on reception of the transmission necessity response signal.
  • FIG. 4A shows a relay terminal that has received the transmission necessity confirmation signal It is a sequence chart for demonstrating a part of process example at the time of receiving a transmission necessity confirmation signal from another terminal before transmitting a transmission necessity response signal.
  • FIG. 4B is a sequence chart for explaining processing performed following the processing example of FIG. 4A.
  • relay terminal 3 is in a position where data can be transmitted / received to / from the information transmission terminal 9 without going through the relay terminal.
  • the information transmission terminal 9 transmits a transmission necessity confirmation signal including the terminal ID9, the information ID ⁇ , and the reference time T0 of the information transmission terminal 9 at a random timing from the reference time T0 until the time Ta elapses. send.
  • relay terminal 1 includes terminal ID 9 and information ID ⁇ of information transmitting terminal 9 at random timing after receiving the transmission necessity confirmation signal until time Tb elapses from reference time T0. A transmission necessity response signal is transmitted.
  • the relay terminal 3 includes the terminal ID 9 and the information ID ⁇ of the information transmitting terminal 9 at random timing after receiving the transmission necessity confirmation signal until the time Tb elapses from the reference time T0. A transmission necessity response signal is transmitted.
  • the information transmission terminal 9 transmits information including the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at the timing of the reference time T0 + time Tb based on the reception of the transmission necessity response signal.
  • relay terminal 1 updates the terminal ID to the ID of relay terminal 1.
  • relay terminal 1 transmits a transmission necessity confirmation signal including terminal ID1, information ID ⁇ , and reference time T1 of relay terminal 1 at random timing from time T1 until time Ta elapses. To do.
  • relay terminal 3 updates the terminal ID to the ID of relay terminal 3.
  • relay terminal 3 transmits a transmission necessity confirmation signal including terminal ID3, information ID ⁇ , and reference time T1 of relay terminal 3 at a random timing from time T1 until time Ta elapses. To do.
  • relay terminal 2 receives the above transmission necessity confirmation signal transmitted in sequence SQ3058, and then at random timing from the reference time T1 until the time Tb elapses.
  • a transmission necessity response signal including the terminal ID 3 of the relay terminal 3 and the information ID ⁇ is transmitted.
  • relay terminal 1 has not received a transmission necessity response signal including the same terminal ID as the transmission necessity confirmation signal transmitted between reference time T1 and reference time T1 + time Tb. It is determined that neither transmission nor retransmission of the transmission necessity confirmation signal is necessary.
  • sequence SQ3060 based on the fact that relay terminal 3 has received the transmission necessity response signal transmitted in sequence SQ2052, information including terminal ID3 and information ID ⁇ of relay terminal 3 at the timing of reference time T1 + time Tb To send.
  • FIG. 5A is a sequence chart for explaining a part of a processing example when the relay terminal that has transmitted the transmission necessity confirmation signal receives a transmission necessity response signal including a terminal ID different from the own terminal.
  • FIG. 5B is a sequence chart for explaining processing performed following the processing example of FIG. 5A.
  • sequence SQ9052, SQ9054, and SQ9056 shown in FIG. 4A is executed by information transmission terminal 9 as shown in FIG. 4A, and sequence SQ1052,
  • the processing similar to SQ1054 and SQ1056 is executed by the relay terminal 1 as shown in FIG. 4A, and the processing similar to the sequences SQ3052, SQ3054 and SQ3056 is executed after being executed by the relay terminal 3 as shown in FIG. 4A.
  • relay terminal 3 includes terminal ID3, information ID ⁇ , and reference time T1 of relay terminal 3 at a random timing from time T1 until time Ta elapses.
  • a transmission necessity confirmation signal is transmitted.
  • relay terminal 1 transmits a transmission necessity confirmation signal including terminal ID1, information ID ⁇ , and reference time T1 of relay terminal 1 at random timing from time T1 until time Ta elapses. To do.
  • relay terminal 2 receives terminal ID3 of relay terminal 3 at random timing after the time Tb elapses from reference time T1 after receiving the above transmission necessity confirmation signal transmitted in sequence SQ3102.
  • a transmission necessity response signal including the information ID ⁇ is transmitted.
  • relay terminal 4 receives terminal ID1 of relay terminal 1 at random timing after the time Tb elapses from reference time T1 after receiving the transmission necessity confirmation signal transmitted in sequence SQ1102.
  • a transmission necessity response signal including the information ID ⁇ is transmitted.
  • the relay terminal 1 transmits a call necessity response signal including the same terminal ID as the transmitted call necessity confirmation signal and the transmitted call necessity confirmation signal between the reference time T1 and the reference time T1 + time Tb. Since both of the transmission necessity response signals including different terminal IDs are received, it is determined that the transmission necessity confirmation signal needs to be retransmitted.
  • relay terminal 1 transmits a transmission necessity confirmation signal including terminal ID1, information ID ⁇ , and reference time T2 of relay terminal 1 at random timing from time T2 until time Ta elapses. To do.
  • sequence SQ3104 based on the fact that relay terminal 3 has received the transmission necessity response signal transmitted in sequence SQ2102, information including terminal ID3 and information ID ⁇ of relay terminal 3 at the timing of reference time T1 + time Tb To send.
  • relay terminal 4 receives terminal ID1 and information ID ⁇ of relay terminal 1 at random timings up to reference time T2 + time Tb after receiving the information transmitted in sequence SQ3104. A transmission necessity response signal is transmitted.
  • relay terminal 2 since relay terminal 2 has already acquired information of information ID ⁇ , relay terminal 2 does not respond to a transmission necessity confirmation signal including terminal ID1 of relay terminal 1 and information ID ⁇ .
  • sequence SQ1110 based on the fact that relay terminal 1 receives the transmission necessity response signal transmitted in sequence SQ4104, information including terminal ID1 and information ID ⁇ of relay terminal 1 at the timing of reference time T2 + time Tb To send.
  • FIG. 6A is a diagram for explaining a part of the processing example (first half part) when the relay terminal that has transmitted the transmission necessity confirmation signal receives a transmission necessity response signal including a terminal ID and information ID different from the own terminal. It is a sequence chart.
  • FIG. 6B is a sequence chart for explaining processing (second half part) performed following the processing example of FIG. 6A.
  • information transmitting terminal 9 transmits a transmission necessity confirmation signal including terminal ID 9 of information transmitting terminal 9, information ID ⁇ , and reference time T0.
  • the relay terminal 1 includes the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at a random timing after receiving the transmission necessity confirmation signal and before the time Tb elapses from the reference time T0. A transmission necessity response signal is transmitted.
  • the information transmission terminal 9 transmits information including the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at the timing of the reference time T0 + time Tb based on the reception of the transmission necessity response signal.
  • relay terminal 1 updates the terminal ID to the ID of relay terminal 1.
  • relay terminal 1 transmits a transmission necessity confirmation signal including terminal ID1, information ID ⁇ , and reference time T1 of relay terminal 1 at random timing from time T1 until time Ta elapses. To do.
  • relay terminal 3 updates the reference time to T1.
  • relay terminal 3 transmits a transmission necessity confirmation signal including terminal ID3, information ID ⁇ , and reference time T1 of relay terminal 3 at a random timing from time T1 until time Ta elapses. To do.
  • relay terminal 2 relays at a random timing from the reference time T1 to the elapse of time Tb after receiving the transmission necessity confirmation signal transmitted in sequence SQ3154.
  • a transmission necessity response signal including the terminal ID 3 of the terminal 3 and the information ID ⁇ is transmitted.
  • relay terminal 1 has received a transmission necessity response signal including an information ID different from the transmitted transmission necessity confirmation signal between reference time T1 and reference time T1 + time Tb. It is determined that retransmission is necessary.
  • relay terminal 1 transmits a transmission necessity confirmation signal including terminal ID1, information ID ⁇ , and reference time T2 of relay terminal 1 at random timing from time T2 until time Ta elapses. To do.
  • sequence SQ3156 based on the fact that relay terminal 3 has received the transmission necessity response signal transmitted in sequence SQ2152, information including terminal ID3 and information ID ⁇ of relay terminal 3 at the timing of reference time T1 ++ time Tb To send.
  • the relay terminal When the relay terminal receives the transmission necessity confirmation signal, it receives another transmission necessity confirmation signal before the time when the signal is received and after the reference time, and the terminal IDs included therein are different. If there is, a call necessity response signal for explicitly notifying that the call is not required (no) may be transmitted in response to the call necessity confirmation signal received later.
  • FIG. 7 is a flowchart for explaining the flow of reception processing of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 to 3).
  • the mobile terminal determines whether or not a call necessity confirmation signal including a terminal ID, an information ID, and a reference time has been received.
  • step S704 the mobile terminal determines whether it is a transmission necessity confirmation signal including an information ID that has been received. If it is determined that the mobile terminal is a transmission necessity confirmation signal including an information ID that has been received (YES in step S704), the reception process ends. If the mobile terminal determines that it is not a transmission necessity confirmation signal including an information ID that has been received (NO in step S704), in step S706, a random timing from the reference time until the time Tb elapses. To send a call necessity response signal.
  • step S708 the mobile terminal receives information including the terminal ID and the information ID.
  • step S710 the mobile terminal changes the terminal ID to the terminal ID of its own terminal.
  • FIG. 8 is a flowchart for explaining the flow of transmission processing of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 to 3).
  • step S802 the mobile terminal updates the reference time to a time added by time Tc.
  • step S804 the mobile terminal transmits a transmission necessity confirmation signal at a random timing from the reference time until the time Ta elapses.
  • step S806 the mobile terminal determines whether or not a transmission necessity response signal including an information ID different from the information ID included in the transmission necessity confirmation signal has been received before the time Tb has elapsed from the reference time. To do.
  • step S806 determines that the call necessity response signal shown in step S806 has been received (YES in step S806). If the mobile terminal determines that the call necessity response signal shown in step S806 has been received (YES in step S806), the process proceeds to step S812. If it is determined that the mobile terminal has not received the call necessity response signal shown in step S806 (NO in step S806), the mobile terminal obtains its own terminal ID until time Tb elapses from the reference time in step S808. It is determined whether or not an outgoing call necessity response signal is received.
  • step S810 the call including the other terminal ID is passed until time Tb elapses from the reference time. It is determined whether a necessity response signal has been received. If the mobile terminal determines that it has not received the call necessity response signal shown in step S808 (NO in step S808), it ends the process.
  • step S810 If it is determined that the mobile terminal has received the transmission necessity response signal shown in step S810 (YES in step S810), the mobile terminal waits until time Tc elapses from the reference time in step S812. When it is determined that the mobile terminal has not received the transmission necessity response signal shown in step S810 (NO in step S810), the mobile terminal transmits information including the terminal ID and the information ID in step S814.
  • FIG. 9 is a time chart relating to transmission and reception of signals and information in the relay terminal.
  • the relay terminal receives a transmission necessity confirmation signal including a terminal ID, an information ID, and a reference time T0 at a random timing from the reference time T0 until the time Ta elapses.
  • the relay terminal 1 transmits a transmission necessity response signal including the terminal ID and the information ID at a random timing after the time Tb elapses from the reference time T0 after receiving the transmission necessity confirmation signal. Further, the relay terminal receives information including the terminal ID and the information ID at the timing of the reference time T0 + time Tb.
  • the relay terminal transmits a transmission necessity confirmation signal including the terminal ID, the information ID, and the reference time T1 at a random timing from the reference time T1 until the time Ta elapses.
  • the relay terminal receives the transmission necessity response signal including the terminal ID and the information ID at a random timing after the time Tb elapses from the reference time T1 after receiving the transmission necessity confirmation signal. Further, the relay terminal transmits information including the terminal ID and the information ID at the timing of the reference time T1 + time Tb.
  • FIG. 10 is a time chart relating to transmission / reception of signals and information in the relay terminal, and a time chart in a case where the transmission necessity response signal of the terminal ID of the other terminal is received while waiting for the transmission necessity response signal. It is.
  • the relay terminal receives a transmission necessity confirmation signal including a terminal ID, an information ID, and a reference time T0 at a random timing from the reference time T0 until the time Ta elapses.
  • the relay terminal 1 transmits a transmission necessity response signal including the terminal ID and the information ID at a random timing after the time Tb elapses from the reference time T0 after receiving the transmission necessity confirmation signal. Further, the relay terminal receives information including the terminal ID and the information ID at the timing of the reference time T0 + time Tb.
  • the relay terminal transmits a transmission necessity confirmation signal including the terminal ID, the information ID, and the reference time T1 at a random timing from the reference time T1 until the time Ta elapses.
  • the relay terminal receives a transmission necessity response signal including an information ID different from the transmitted transmission necessity confirmation signal until the time Tb elapses from the reference time T1.
  • the relay terminal transmits a transmission necessity confirmation signal including the terminal ID, the information ID, and the reference time T2 at a random timing from the reference time T2 until the time Ta elapses.
  • a mobile terminal that transmits information (hereinafter also referred to as “information P”) includes a communication unit 130 and a communication control unit 112 for controlling the communication unit 130.
  • the communication control unit 112 includes a first response request signal (transmission necessity / unnecessity) including a first identifier (terminal ID) for identifying the terminal itself and a second identifier (information ID) for identifying the information P.
  • a confirmation signal is transmitted via the communication unit 130.
  • the communication control unit 112 has received the first response signal (transmission necessity response signal) for the first response request signal within the first period, and the first response request signal within the first period.
  • Information P is transmitted via the communication unit 130 on the condition that the second response signal for the second response request signal different from the above is not received.
  • a mobile terminal that is in a position where radio waves simultaneously reach from two or more other communication terminals and that has received a response request signal from each of the two or more other communication terminals, By notifying only the response signal with respect to the received response request signal, which of the other two or more mobile terminals is requested to transmit information to the other two or more Can be transmitted to all mobile terminals at the same time. Thereby, it is possible to prevent radio wave interference that occurs when two or more of the other two or more mobile terminals simultaneously transmit information, and the mobile terminal receives the information correctly. become able to.
  • the mobile terminal includes a storage unit 120 (specifically, an information ID storage unit 122) that stores a second identifier (information ID) for identifying the information P received via the communication unit 130.
  • a storage unit 120 specifically, an information ID storage unit 122 that stores a second identifier (information ID) for identifying the information P received via the communication unit 130.
  • the communication control unit 112 does not transmit a response signal corresponding to the response request signal.
  • the communication control unit 112 receives the information P via the communication unit 130 before transmitting the response request signal.
  • the response request signal includes a first identifier (terminal ID) for identifying the terminal itself and a second identifier (information ID) for identifying information P.
  • the first response signal (transmission necessity response signal) includes a first identifier (terminal ID).
  • Terminal ID a first identifier
  • the communication control unit 112 When the communication control unit 112 receives the second response signal via the communication unit 130 within the first period, the communication control unit 112 retransmits the response request signal via the communication unit 130 within the fourth period. .
  • a terminal that transmits information determines the current time as a reference time T0.
  • the terminal that transmits the information has its own terminal at a random timing from the reference time T0 until the time Ta elapses (at an arbitrary timing from the reference time T0 until the time Ta elapses).
  • a transmission necessity confirmation signal including the terminal ID, information ID, reference time T0, and frequency information used at the time of relay data transmission is transmitted.
  • the terminal that has received the transmission necessity confirmation signal has a random timing between the reference time T0 and the time Tb included in the transmission necessity confirmation signal (the time Tb is calculated from the reference time T0).
  • a transmission necessity response signal including the terminal ID, the information ID, and the frequency information included in the transmission necessity confirmation signal is transmitted at an arbitrary timing until the time elapses.
  • the said terminal receives the said transmission necessity confirmation signal, when the terminal necessity confirmation signal which another terminal transmits before the time Tb passes from the reference time T0, the said terminal is later Nothing is done about the received transmission necessity confirmation signal.
  • the terminal that has received the call necessity response including the terminal ID of the own terminal before the time Tb elapses from the reference time T0 is the terminal ID of the own terminal at the timing when the time Tb elapses from the reference time T0. And information including the information ID are transmitted using the use frequency included in the transmission necessity confirmation signal.
  • the terminal that has received the information sets the time after the elapse of time Tc from the reference time T0 as a new reference time T1. Thereafter, each terminal repeats the processes (b) to (e).
  • communication system 900 is also used for transmission / reception of information including a frequency used for transmission / reception of a transmission necessity confirmation signal, a terminal ID, and an information ID, as in the first embodiment.
  • the frequency may be different from each other.
  • the transmission necessity response signal includes only the frequency information and the terminal ID, and may not include the information ID.
  • the information may include only the information ID and may not include the terminal ID.
  • a value obtained by calculation from information such as a hash value such as MD5, SHA-1, or SHA-2 for a message included in the information as the information ID, the information ID is explicitly included in the information. It may not be possible.
  • the current time is set as the reference time T0.
  • the reference time T0 is included in the transmission necessity confirmation signal to transmit the reference time information between terminals.
  • a rule may be introduced such that 0 second per minute is set as a reference time candidate, and a reference time candidate closest to the current time is set as a reference time, so that all terminals autonomously determine the reference time according to a clock.
  • the reference time in (a) above is used. For example, by introducing a rule that, for example, 0 second per minute is set as a reference time candidate and a reference time candidate closest to the current time is set as a reference time, the reference times of all information transmission terminals are synchronized. It is desirable to make it.
  • the terminal After transmitting the transmission necessity confirmation signal, the terminal transmits a transmission necessity response signal that includes the same frequency information as the frequency information included in the transmission necessity confirmation signal and includes a terminal ID different from that of the terminal itself. If it is received before the time Tb elapses from the time T0, information is not transmitted immediately for avoiding interference, and the time after the time Tc has elapsed from the reference time T0 is set as a new reference time T1, At a random timing from the reference time T1 until the time Ta elapses (at an arbitrary timing from the reference time T1 until the time Ta elapses), the terminal ID, information ID, and reference time T1 of the terminal itself And the transmission necessity confirmation signal including the frequency information.
  • the terminal may change the frequency information to another frequency information.
  • the frequency information included in the transmission necessity confirmation signal may be freely determined by each terminal as long as other terminals can receive the frequency information.
  • each terminal may use the frequency used when the terminal receives information, or may use other frequencies.
  • the terminal does not transmit a transmission necessity response signal when the information ID included in the transmission necessity confirmation signal is the same as the information ID of the information received in the past.
  • FIG. 11 is a sequence chart for explaining a processing flow when a relay terminal receives a transmission necessity confirmation signal only from one terminal. is there.
  • the information transmission terminal 9 has information on the frequency Z used at the time of relay data transmission, the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at random timing from the reference time T0 until the time Ta elapses.
  • a transmission necessity confirmation signal including the reference time T0 is transmitted.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • the information transmission indicated by the received transmission necessity confirmation signal can be received means that data transmitted simultaneously at different frequencies can be received as in SQ1260 and SQ3256.
  • the information transmission indicated by the received transmission necessity confirmation signal cannot be received means one of the following ( ⁇ ) and ( ⁇ ).
  • sequence SQ9206 based on the fact that the information transmission terminal 9 has received the transmission necessity response signal transmitted in sequence SQ1202, the information transmission terminal 9 transmits information including terminal ID9 and information ID ⁇ at frequency Z at the timing of reference time T0 + time Tb. Make a call.
  • relay terminal 1 updates the terminal ID to the ID of relay terminal 1 after receiving the information transmitted in sequence SQ9206.
  • the relay terminal 1 performs the random timing from the reference time T1 until the time Ta elapses, information on the frequency X used at the time of relay data transmission, the terminal ID1, the information ID ⁇ , and the reference time of the relay terminal 1.
  • a transmission necessity confirmation signal including T1 is transmitted.
  • relay terminal 2 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T1.
  • a transmission necessity response signal including the information on the frequency X, the terminal ID1, and the information ID ⁇ is transmitted at random timing.
  • the information transmission indicated by the received transmission necessity confirmation signal can be received means that data transmitted simultaneously at different frequencies can be received as described above.
  • the information transmission indicated by the received transmission necessity confirmation signal cannot be received means one of the above ( ⁇ ) and ( ⁇ ).
  • relay terminal 1 receives information including terminal ID1 and information ID ⁇ at frequency X at the timing of reference time T1 + time Tb based on receiving the transmission necessity response signal transmitted in sequence SQ2202. send.
  • FIG. 12A is a sequence chart showing a part of a processing example in a case where information is transmitted to two terminals simultaneously.
  • FIG. 12B is a sequence chart for explaining processing performed subsequent to the processing example of FIG. 12A.
  • information transmitting terminal 9 transmits a transmission necessity confirmation signal including information on frequency Z used for data transmission, terminal ID9, information ID ⁇ , and reference time T0.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • the information transmission terminal 9 receives the information including the terminal ID 9 and the information ID ⁇ at the timing of the reference time T0 + time Tb based on the reception necessity response signal transmitted in the sequence SQ1252. Make a call.
  • relay terminal 3 uses frequency information (frequency Y information), terminal ID3 of relay terminal 3 and information used at the time of relay data transmission at random timing from time T1 until time Ta elapses.
  • a transmission necessity confirmation signal including ID ⁇ and reference time T1 is transmitted.
  • relay terminal 2 determines that it can receive the information transmission indicated by the received transmission necessity confirmation signal after receiving the transmission necessity confirmation signal transmitted in sequence SQ3254. Then, a transmission necessity response signal including information on the frequency Y, the terminal ID3, and the information ID ⁇ is transmitted at random timing from the reference time T1 until the time Tb elapses. Further, in sequence SQ2254, after receiving the call necessity confirmation signal transmitted in sequence SQ1258, relay terminal 2 determines that the information transmission indicated by the received call necessity confirmation signal can be received, and the reference time T1 A transmission necessity response signal including the information on the frequency X, the terminal ID1, and the information ID ⁇ is transmitted at random timing from the time Tb until the time Tb elapses.
  • the relay terminal 1 receives the transmission necessity response signal transmitted in sequence SQ2254, and the relay terminal 2 and the information transmission terminal 9 at the timing of reference time T1 + time Tb.
  • Information including terminal ID1 and information ID ⁇ is transmitted at frequency X.
  • relay terminal 3 receives information including terminal ID3 and information ID ⁇ at frequency Y at the timing of reference time T1 + time Tb based on reception of the transmission necessity response signal transmitted in sequence SQ2252. send.
  • Relay terminal 2 receives simultaneously the information transmitted in sequence SQ1260 and the information transmitted in sequence SQ3256.
  • FIG. 15A is a sequence chart showing a part of a processing example in a case where information is transmitted from one terminal and a transmission necessity confirmation signal is retransmitted by another terminal.
  • FIG. 15B is a sequence chart for explaining processing performed following the processing example of FIG. 15A.
  • information transmitting terminal 9 transmits a transmission necessity confirmation signal including information on frequency Z used for data transmission, terminal ID9, information ID ⁇ , and reference time T0.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • the information transmission terminal 9 receives information including the terminal ID9 and the information ID ⁇ at the timing of the reference time T0 + time Tb based on the fact that the transmission necessity response signal transmitted in the sequence SQ1302 is received. Make a call.
  • the relay terminal 3 is the random timing from the reference time T1 until the time Ta elapses, the frequency Y information used at the time of relay data transmission, the terminal ID3, the information ID ⁇ , and the reference time of the relay terminal 3.
  • a transmission necessity confirmation signal including T1 is transmitted.
  • relay terminal 2 determines that it can receive the information transmission indicated by the received transmission necessity confirmation signal after receiving the transmission necessity confirmation signal transmitted in sequence SQ3304. Then, a transmission necessity response signal including information on the frequency Y, the terminal ID3, and the information ID ⁇ is transmitted at random timing from the reference time T1 until the time Tb elapses.
  • relay terminal 1 has received a transmission necessity response signal including information ID and frequency Y information different from the transmission necessity confirmation signal transmitted between reference time T1 and reference time T1 + time Tb. It is determined that it is necessary to retransmit the transmission necessity confirmation signal.
  • the relay terminal 1 determines the frequency X information used for data transmission, the terminal ID1 of the relay terminal 1, the information ID ⁇ , and the reference time T2 at random timing from the reference time T2 until the time Ta elapses.
  • a transmission necessity confirmation signal including is transmitted.
  • relay terminal 3 transmits information including terminal ID of relay terminal 3 and information ID ⁇ at frequency Y.
  • FIG. 17A shows a certain period of time after a terminal that has received a busy state notification (for example, relay terminal 1) has received the busy state notification. Then, it is a sequence chart showing a part of an example of processing in the case of retransmitting a call availability confirmation signal.
  • FIG. 17B is a sequence chart for explaining processing performed subsequent to the processing example of FIG. 17A. Specifically, FIGS. 17A and 17B are processing examples when a busy signal is used as shown in FIGS.
  • information transmitting terminal 9 transmits a transmission necessity confirmation signal including information on frequency Z used for data transmission, terminal ID9, information ID ⁇ , and reference time T0.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • the information transmission terminal 9 receives information including the terminal ID 9 and the information ID ⁇ at the timing of the reference time T0 + time Tb based on the fact that the transmission necessity response signal transmitted in the sequence SQ1352 is received. Make a call.
  • frequency information frequency X information
  • relay terminal 3 uses frequency information (frequency Y information), terminal ID3 and information of relay terminal 3 to be used at the time of relay data transmission at random timing from time T1 until time Ta elapses.
  • a transmission necessity confirmation signal including ID ⁇ and reference time T1 is transmitted.
  • relay terminal 2 receives a transmission necessity confirmation signal transmitted in sequence SQ3254, and then at random timing from time Tb until reference time T1 elapses.
  • a transmission necessity response signal including information on frequency Y, terminal ID3, and information ID ⁇ is transmitted.
  • relay terminal 2 receives the information on frequency X at random timing after the time Tb elapses from reference time T1 after receiving the transmission necessity confirmation signal transmitted in sequence SQ1358.
  • a transmission necessity response signal including terminal ID1 and information ID ⁇ is transmitted with a busy flag.
  • the relay terminal 1 has the random timing from the reference time T2 until the time Ta elapses, information on the frequency X used for data transmission, the terminal ID1, information ID ⁇ , and the reference time T1 of the relay terminal 1.
  • a transmission necessity confirmation signal including is transmitted.
  • the relay terminal 3 receives information including the terminal ID3 and the information ID ⁇ at the frequency Y at the timing of the reference time T1 + time Tb based on the reception necessity response signal transmitted in the sequence SQ2352. send.
  • the relay terminal that has transmitted the transmission necessity response signal with the busy flag receives the transmission necessity response signal without the busy flag when the busy state is canceled, and the relay terminal that has received the transmission necessity response signal with the busy flag The processing may be stopped until a transmission necessity response signal without a busy flag is received.
  • the relay terminal 3 cannot receive information transmissions from two terminals at the same time. Further, in this example, since the processing of sequence SQ3354 happens to be performed earlier than the processing of sequence SQ1358, the transmission necessity confirmation signal of relay terminal 3 is relayed than the transmission necessity confirmation signal of relay terminal 1. The terminal 2 is reached early. For this purpose, the relay terminal 2 transmits a response signal without a busy flag to the confirmation signal from the relay terminal 3, and transmits a response signal with a busy flag to the confirmation signal from the relay terminal 1.
  • FIG. 18A is a sequence showing a part of another processing example in the case where a terminal (for example, relay terminal 1) that has received a busy state notification retransmits a call availability confirmation signal after a certain period of time has elapsed after receiving the busy state notification. It is a chart.
  • FIG. 18B is a sequence chart for explaining processing performed subsequent to the processing example of FIG. 18A. Specifically, FIGS. 18A and 18B are processing examples when a busy signal is used as shown in FIGS.
  • information transmitting terminal 9 transmits a transmission necessity confirmation signal including information on frequency Z used for data transmission, terminal ID9, information ID ⁇ , and reference time T0.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • the information transmission terminal 9 receives information including the terminal ID9 and the information ID ⁇ at the timing of the reference time T0 + time Tb based on the reception necessity response signal transmitted in the sequence SQ1402. Make a call.
  • relay terminal 1 updates the terminal ID to the ID of relay terminal 1.
  • relay terminal 1 uses frequency information (frequency X information), terminal ID1 and information of relay terminal 1 used at the time of relay data transmission at random timing from time T1 until time Ta elapses.
  • a transmission necessity confirmation signal including ID ⁇ and reference time T1 is transmitted.
  • relay terminal 3 uses frequency information (frequency X information), terminal ID3 and information of relay terminal 3 to be used at the time of relay data transmission at random timing from time T1 until time Ta elapses.
  • a transmission necessity confirmation signal including ID ⁇ and reference time T1 is transmitted.
  • relay terminal 2 determines that the information ID ⁇ has already been acquired, and includes a transmission request including terminal ID 3 of relay terminal 3 and information ID ⁇ transmitted in sequence SQ3404. It does not respond to the rejection confirmation signal.
  • the relay terminal 2 receives the information on the frequency X and the terminal ID1 at random timing after the time Tb elapses from the reference time T1 after receiving the transmission necessity confirmation signal transmitted in the sequence SQ1408. And a transmission necessity response signal including the information ID ⁇ are transmitted with a busy flag.
  • relay terminal 1 has information on frequency X used for data transmission, terminal ID1 of relay terminal 1, information ID ⁇ , and reference time T1 at random timing from time T2 until time Ta elapses.
  • the transmission necessity confirmation signal of relay terminal 3 is more than the transmission necessity confirmation signal of relay terminal 1. Has reached the relay terminal 2 early. For this reason, the relay terminal 2 cannot give a normal response signal to the transmission necessity confirmation signal of the relay terminal 1 (other terminals may return a response signal to the necessity confirmation signal transmitted by the relay terminal 3. Therefore, interference may occur at the frequency X). However, if no response is returned to the transmission necessity confirmation signal of the relay terminal 1, the relay terminal 1 does not retransmit the necessity confirmation signal, so that the relay terminal 2 cannot acquire the information of the information ID ⁇ . . Therefore, the relay terminal 2 returns a response signal with a busy flag in response to the transmission necessity confirmation signal of the relay terminal 1 to prompt retransmission of the transmission necessity confirmation signal.
  • FIG. 13 is a flowchart for explaining a processing flow of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 to 3).
  • the relay terminal determines whether time Tb has elapsed from the reference time. If the mobile terminal determines that time Tb has elapsed from the reference time (YES in step S1302), in step S1312, the mobile terminal receives information including the terminal ID and the information ID from the relay terminal. In step S1314, the mobile terminal updates the terminal ID to the terminal ID of its own terminal.
  • step S1304 the mobile terminal transmits a call necessity confirmation signal including the terminal ID, the information ID, the reference time, and the frequency information. It is determined whether or not it has been received. If it is determined that the mobile terminal has not received the call necessity confirmation signal (NO in step S1304), the process proceeds to step S1302. When it is determined that the mobile terminal has received the call necessity confirmation signal (YES in step S1304), in step S1306, the frequency information included in the call necessity confirmation signal has been received from the reference time to the present time. It is determined whether or not the frequency information is included in another transmission necessity confirmation signal.
  • step S1308 the frequency information included in the transmission necessity confirmation signal shown in step S1304 is obtained. Then, it is determined whether or not the frequency information is included in the transmission necessity response signal scheduled to be transmitted (transmitted) at a random time until the time Tb elapses from the reference time.
  • step S1308 If the mobile terminal determines that the frequency information is included in the transmission necessity response signal scheduled to be transmitted (transmitted) (YES in step S1308), the process proceeds to step S1302. If the mobile terminal determines that the frequency information is not included in the transmission necessity response signal scheduled to be transmitted (transmitted) (NO in step S1308), in step S1310, a busy flag is set and time Tb has elapsed from the reference time. It is reserved that a transmission necessity response signal is transmitted at random timing until the transmission is performed.
  • Step S1308 when the transmission necessity confirmation signal of the information ID that has been received in the past is received first, NO is determined in step S1308. In this case, a retransmission request is required. If it is determined as YES in step S1308, transmission can be suppressed by a transmission necessity response signal to another terminal.
  • Step S1310 is a process for giving up transmission and having it retransmitted this time.
  • step S1316 the information ID included in the transmission necessity confirmation signal shown in step S1304 is It is determined whether or not the information ID has been received in the past. Note that step S1316 is processing for determining whether or not the number of signals that can be simultaneously received is exceeded.
  • step S1318 the mobile terminal determines whether information transmitted at the frequency can be received.
  • step S1320 the mobile terminal transmits a transmission necessity response signal at a random timing until the time Tb elapses from the reference time. make a reservation. If the mobile terminal determines that reception is not possible (NO in step S1318), the process proceeds to step S1310.
  • FIG. 14 is a flowchart for explaining a processing flow of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 to 3). Note that the series of processing shown in FIG. 14 is executed by the number of received information.
  • step S1402 the mobile terminal updates the reference time to a time obtained by adding time Tc to the current reference time.
  • step S ⁇ b> 1404 the mobile terminal transmits a transmission necessity confirmation signal including the ID of its own terminal at random timing from the reference time to the time obtained by adding the time Ta to the reference time.
  • step S1406 the mobile terminal determines whether or not a transmission necessity response signal including its own terminal ID has been received before the time Tb elapses from the reference time.
  • step S1408 "whether the busy flag is included in the transmission necessity response signal including its own terminal ID” or "time Tb has elapsed from the reference time. It is determined whether or not an outgoing call necessity response signal including the other terminal ID has been received by the time ". If the mobile terminal determines that it has not been received (NO in step S1406), the series of processing ends.
  • step S1408 If a positive determination is made in step S1408 (YES in step S1408), the mobile terminal waits until time Tc elapses from the reference time in step S1410. If a negative determination is made in step S1408 (NO in step S1408), the mobile terminal transmits information including a terminal ID and an information ID in step S1412.
  • the transmission necessity response signal may include an instruction for changing the frequency and transmitting the transmission necessity confirmation signal again.
  • a certain frequency may be congested on the receiving side even if it is not congested on the transmitting side. Requesting a frequency change from the receiving side is effective in such a situation.
  • the response request signal (transmission necessity confirmation signal) and the response signal (transmission necessity response signal) further include information on the frequency used for transmitting the information P. According to said structure, the information of the frequency used for transmission of the information P can be obtained.
  • the communication control unit 112 may receive different information using a frequency band different from the frequency band for receiving the information P in the time zone for receiving the information P. According to the above configuration, radio wave interference can be prevented.
  • the communication control unit 112 requests the response via the communication unit 130 within the fourth time. Retransmit the signal. According to said structure, since a response request signal can be resent, even if a partner terminal is temporarily busy, it becomes possible after that to transmit the information P to the said partner terminal.
  • the information transmitting terminal when transmitting information, includes a time stamp in the information so that the relay terminal does not relay the expired information. Specifically, the relay terminal confirms the time stamp added to the information, and does not relay information that has passed a certain time since the information transmission (information that has expired).
  • a terminal that transmits information determines the current time as a reference time T0.
  • the terminal that transmits the information has its own terminal at a random timing from the reference time T0 until the time Ta elapses (at an arbitrary timing from the reference time T0 until the time Ta elapses).
  • a transmission necessity confirmation signal including the terminal ID, the information ID, and the reference time T0 is transmitted.
  • the terminal that has received the transmission necessity confirmation signal has a random timing between the reference time T0 and the time Tb included in the transmission necessity confirmation signal (the time Tb is calculated from the reference time T0).
  • a transmission necessity response signal including the terminal ID and the information ID included in the transmission necessity confirmation signal is transmitted at an arbitrary timing until the time elapses.
  • the terminal that has received the call necessity response including the terminal ID of the own terminal before the time Tb elapses from the reference time T0 is the terminal ID of the own terminal at the timing when the time Tb elapses from the reference time T0. And information including the information ID is transmitted.
  • the terminal that has received the information refers to the time stamp included in the information, so that the current time is within the transmission deadline (within the time limit prescribed in advance in the communication system 900 or the like (within the time limit for allowing relaying)) If it is not within the transmission deadline, the process is terminated. If it is within the transmission deadline, the time after the elapse of time Tc from the reference time T0 is determined as a new reference time T1. Thereafter, each terminal repeats the processes (b) to (e).
  • the frequency used for transmission / reception of the transmission necessity confirmation signal may be different from the frequency used for transmission / reception of information including the terminal ID and the information ID.
  • the call necessity response signal includes only the terminal ID and may not include the information ID, and the information may include only the information ID and may not include the terminal ID.
  • the information ID is explicitly included in the information. It may not be possible.
  • the current time is set as the reference time T0.
  • the reference time T0 is included in the transmission necessity confirmation signal to transmit the reference time information between terminals.
  • a rule may be introduced such that 0 second per minute is set as a reference time candidate, and a reference time candidate closest to the current time is set as a reference time, so that all terminals autonomously determine the reference time according to a clock.
  • the reference time in (a) above is used. For example, by introducing a rule that, for example, 0 second per minute is set as a reference time candidate and a reference time candidate closest to the current time is set as a reference time, the reference times of all information transmission terminals are synchronized. It is desirable to make it.
  • the terminal does not transmit a transmission necessity response signal when the information ID included in the transmission necessity confirmation signal is the same as the information ID of the information received in the past.
  • the relay terminal may send a transmission necessity confirmation signal with a time stamp, and the relay terminal that receives it may not send a transmission necessity response signal when the time stamp has exceeded the time limit.
  • FIG. 19 is a sequence chart for explaining the flow of processing when a time stamp is included in information.
  • information transmission terminal 9 transmits a transmission necessity confirmation signal including terminal ID9, information ID ⁇ , and reference time T0 of information transmission terminal 9 at random timing from time T0 until time Ta elapses.
  • relay terminal 1 includes terminal ID 9 and information ID ⁇ of information transmitting terminal 9 at random timing after receiving the transmission necessity confirmation signal until time Tb elapses from reference time T0. A transmission necessity response signal is transmitted.
  • the information transmission terminal 9 receives information including the terminal ID 9 of the information transmission terminal 9, the information ID ⁇ , and the time stamp at the timing of the reference time T0 + time Tb based on the reception of the transmission necessity response signal. send.
  • the relay terminal 2 includes the terminal ID1 and the information ID ⁇ of the relay terminal 1 at a random timing from the reference time T1 until the time Tb elapses after receiving the transmission necessity confirmation signal.
  • a necessity response signal is transmitted.
  • relay terminal 1 transmits information including terminal ID 1, information ID, and time stamp of relay terminal 1 at the timing of reference time T 1 + time Tb based on reception of the transmission necessity response signal.
  • relay terminal 2 ends the process without transmitting a transmission necessity confirmation signal because the time stamp has exceeded the time limit.
  • FIG. 20 is a flowchart for explaining the flow of processing of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 and 2 in FIG. 19).
  • the mobile terminal determines whether or not a call necessity confirmation signal including a terminal ID, an information ID, and a reference time has been received.
  • step S2004 the mobile terminal determines whether it is a transmission necessity confirmation signal including an information ID that has been received. If it is determined that the mobile terminal is a transmission necessity confirmation signal including an information ID that has been received (YES in step S2004), the reception process ends. If the mobile terminal determines that it is not a transmission necessity confirmation signal including an information ID that has been received (NO in step S2004), in step S2006, a random timing from the reference time until the time Tb elapses. To send a call necessity response signal.
  • step S2008 the mobile terminal receives information including a terminal ID, an information ID, and a time stamp.
  • step S2010 the mobile terminal changes the terminal ID to the terminal ID of its own terminal.
  • FIG. 21 is a flowchart for explaining the flow of transmission processing of a mobile terminal functioning as a relay terminal (for example, relay terminals 1 to 3).
  • step S2102 the mobile terminal updates the reference time to a time obtained by adding time Tc.
  • step S2104 the mobile terminal transmits a transmission necessity confirmation signal at a random timing from the reference time until the time Ta elapses.
  • step S2106 the mobile terminal determines whether the time stamp of the received information has expired. If the mobile terminal determines that the time limit has passed (YES in step S2106), the series of processing ends. If the mobile terminal determines that the time limit has not passed (NO in step S2106), in step S2108, the mobile terminal is included in the necessity confirmation signal that has been transmitted until the time Tb elapses from the reference time. It is determined whether a call necessity response signal including an information ID different from the information ID is received.
  • step S2108 determines that the call necessity response signal shown in step S2108 has been received (YES in step S2108), the process proceeds to step S2114. If it is determined that the mobile terminal has not received the transmission necessity response signal shown in step S2108 (NO in step S2108), in step S2110, the mobile terminal obtains its own terminal ID until the time Tb elapses. It is determined whether or not an outgoing call necessity response signal is received.
  • step S2112 the transmission including the other terminal ID is performed until the time Tb elapses from the reference time. It is determined whether a necessity response signal has been received. If the mobile terminal determines that it has not received the transmission necessity response signal shown in step S2110 (NO in step S2110), it ends the process.
  • the mobile terminal waits until time Tc elapses from the reference time in step S2114. If the mobile terminal determines that it has not received the transmission necessity response signal shown in step S2112 (NO in step S2112), it transmits information including the terminal ID, information ID, and time stamp in step S2116. .
  • Embodiments 1 and 2 a part of the processing of the mobile terminal is summarized as follows.
  • Information P further includes a time stamp.
  • the communication control unit 112 transmits a response request signal on the condition that the date and time indicated by the time stamp is within a predetermined time limit (sending time limit). According to the above configuration, it is possible to prevent the expired information P from being transmitted.
  • FIG. 22 is a sequence chart for explaining the flow of processing when the data transmission and the transmission necessity confirmation signal are performed in parallel to shorten the data transmission time.
  • the information transmission terminal 9 has information on the frequency Z used at the time of relay data transmission, the terminal ID 9 and the information ID ⁇ of the information transmission terminal 9 at random timing from the reference time T0 until the time Ta elapses.
  • a transmission necessity confirmation signal including the reference time T0 is transmitted.
  • relay terminal 1 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T0.
  • a transmission necessity response signal including information on the frequency Z, the terminal ID 9 of the information transmission terminal 9 and the information ID ⁇ is transmitted at random timing.
  • information transmitting terminal 9 transmits information including terminal ID9 and information ID ⁇ at frequency Z at the timing of reference time T0 + time Tb.
  • relay terminal 1 updates the terminal ID to the ID of relay terminal 1.
  • the relay terminal 1 has information on the frequency Y used at the time of relay data transmission, the terminal ID1 of the relay terminal 1, the information ID ⁇ , and the reference time at random timing from the reference time T1 until the time Ta elapses.
  • a transmission necessity confirmation signal including T1 is transmitted.
  • relay terminal 2 After receiving the transmission necessity confirmation signal, relay terminal 2 determines that the information transmission indicated by the received transmission necessity confirmation signal can be received, and until time Tb elapses from reference time T1.
  • a transmission necessity response signal including information on frequency Y, terminal ID1 and information ID ⁇ is transmitted at random timing.
  • relay terminal 1 transmits information including terminal ID1 and information ID ⁇ at frequency Y at the timing of reference time T1 + time Tb.
  • FIG. 23 is a time chart relating to transmission and reception of signals and information in the terminal when the transmission necessity confirmation signal and information transmission are not performed simultaneously.
  • the terminal transmits a transmission necessity confirmation signal at a frequency (for example, frequency W) allocated for the transmission necessity confirmation signal. Thereafter, the terminal receives a transmission necessity response signal for the transmission necessity confirmation signal transmitted using the same frequency as that used for the transmission of the transmission necessity confirmation signal. Thereafter, the terminal transmits information (data) using a frequency for data transmission (for example, frequency Z). After the transmission of the information is completed, the terminal transmits a transmission necessity confirmation signal at a frequency allocated for the transmission necessity confirmation signal.
  • a frequency for example, frequency W
  • FIG. 16 is a time chart relating to transmission and reception of signals and information in the terminal when the transmission necessity confirmation signal and information transmission are performed simultaneously.
  • the terminal transmits a transmission necessity confirmation signal at a frequency (for example, frequency W) allocated for the transmission necessity confirmation signal. Thereafter, the terminal receives a transmission necessity response signal for the transmission necessity confirmation signal at the same frequency as the frequency used for transmission of the transmission necessity confirmation signal.
  • a frequency for example, frequency W
  • the terminal transmits information (data) using a frequency for data transmission (for example, frequency Z). Further, in parallel with the transmission of the information, the terminal transmits a transmission necessity confirmation signal at a frequency assigned for the transmission necessity confirmation signal.

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

Abstract

L'invention concerne un terminal de communication (9) qui transmet des informations. Le terminal comprend une unité de communication et une unité de commande pour commander l'unité de communication. Via l'unité de communication, l'unité de commande transmet un signal de confirmation de nécessité de transmission contenant un ID de terminal pour identifier le terminal (9) et un ID d'informations pour identifier des informations (SQ9004). Via l'unité de communication, l'unité de commande transmet les informations à condition qu'un premier signal de réponse de nécessité de transmission soit reçu en réponse à un premier signal de confirmation de nécessité de transmission durant une période prescrite, et qu'un second signal de réponse de nécessité de transmission ne soit pas reçu durant la période prescrite en réponse à un second signal de confirmation de nécessité de transmission différent du premier signal de confirmation de nécessité de transmission (SQ9006).
PCT/JP2017/022281 2016-09-12 2017-06-16 Dispositif de communication, procédé de commande, et programme de commande WO2018047432A1 (fr)

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JP2016177547 2016-09-12
JP2016-177547 2016-09-12

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WO2018047432A1 true WO2018047432A1 (fr) 2018-03-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145141A1 (fr) * 2019-01-08 2020-07-16 ソニー株式会社 Dispositif et procédé de réception, et dispositif et procédé de transmission

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000196597A (ja) * 1998-12-24 2000-07-14 Canon Inc 無線通信システム
JP2003348641A (ja) * 2002-05-24 2003-12-05 Sharp Corp 無線通信システムおよび端末局
JP2004180131A (ja) * 2002-11-28 2004-06-24 Kddi Corp 無線端末およびその無線アクセス制御方法
WO2005034433A1 (fr) * 2003-10-03 2005-04-14 Fujitsu Limited Systeme de commande d'acces dans un systeme de reseau local radio (lan)
JP2006020290A (ja) * 2004-05-31 2006-01-19 Matsushita Electric Ind Co Ltd 無線通信方法および無線通信装置
JP2006050519A (ja) * 2003-10-24 2006-02-16 Sony Corp 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム
JP2007110710A (ja) * 2005-10-13 2007-04-26 Samsung Electronics Co Ltd 通信スケジュールリング装置及び方法
JP2014064155A (ja) * 2012-09-21 2014-04-10 Hitachi Ltd 無線検針システム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000196597A (ja) * 1998-12-24 2000-07-14 Canon Inc 無線通信システム
JP2003348641A (ja) * 2002-05-24 2003-12-05 Sharp Corp 無線通信システムおよび端末局
JP2004180131A (ja) * 2002-11-28 2004-06-24 Kddi Corp 無線端末およびその無線アクセス制御方法
WO2005034433A1 (fr) * 2003-10-03 2005-04-14 Fujitsu Limited Systeme de commande d'acces dans un systeme de reseau local radio (lan)
JP2006050519A (ja) * 2003-10-24 2006-02-16 Sony Corp 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム
JP2006020290A (ja) * 2004-05-31 2006-01-19 Matsushita Electric Ind Co Ltd 無線通信方法および無線通信装置
JP2007110710A (ja) * 2005-10-13 2007-04-26 Samsung Electronics Co Ltd 通信スケジュールリング装置及び方法
JP2014064155A (ja) * 2012-09-21 2014-04-10 Hitachi Ltd 無線検針システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145141A1 (fr) * 2019-01-08 2020-07-16 ソニー株式会社 Dispositif et procédé de réception, et dispositif et procédé de transmission
JP7435475B2 (ja) 2019-01-08 2024-02-21 ソニーグループ株式会社 受信装置および方法、並びに送信装置および方法

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