WO2023166667A1 - Système de radiocommunication - Google Patents

Système de radiocommunication Download PDF

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Publication number
WO2023166667A1
WO2023166667A1 PCT/JP2022/009151 JP2022009151W WO2023166667A1 WO 2023166667 A1 WO2023166667 A1 WO 2023166667A1 JP 2022009151 W JP2022009151 W JP 2022009151W WO 2023166667 A1 WO2023166667 A1 WO 2023166667A1
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Prior art keywords
communication
packet
line control
control device
wireless
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PCT/JP2022/009151
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English (en)
Japanese (ja)
Inventor
智也 庄司
直人 高橋
雄也 下尾
日向子 河野
節夫 阿部
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株式会社日立国際電気
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Priority to JP2024504269A priority Critical patent/JPWO2023166667A1/ja
Priority to PCT/JP2022/009151 priority patent/WO2023166667A1/fr
Publication of WO2023166667A1 publication Critical patent/WO2023166667A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to a radio communication system used in a mobile network with autonomous distributed access, and more particularly to a radio communication system that selectively realizes highly efficient or highly reliable communication by efficiently using a plurality of radio devices. .
  • FIG. 11 is a diagram showing an example of a general ad-hoc network.
  • FIG. 12 A conventional wireless communication system will be described with reference to FIG.
  • FIG. 12 is a schematic configuration diagram of a wireless communication system.
  • mobile communication stations 10-1 to 10-4 provided in a plurality of mobile units (#1 to #4) include a communication terminal 1, a line control device 2, and the like. , radio equipment 3, and radio communication is performed with the radio equipment 3 of each mobile communication station 10.
  • FIG. 12 A conventional wireless communication system will be described with reference to FIG. 12 is a schematic configuration diagram of a wireless communication system.
  • mobile communication stations 10-1 to 10-4 provided in a plurality of mobile units (#1 to #4) include a communication terminal 1, a line control device 2, and the like. , radio equipment 3, and radio communication is performed with the radio equipment 3 of each mobile communication station 10.
  • FIG. 12 A conventional wireless communication system will be described with reference to FIG.
  • FIG. 12 is a schematic configuration diagram of a wireless communication system.
  • mobile communication stations 10-1 to 10-4 provided in a plurality of mobile units (#1 to #4) include a
  • the line control device 2 bundles a plurality of radio devices 3 and controls communication between the communication terminal 1 and the radio device 3 . Since the mobile communication station 10-4 is configured to be connected to a single radio device 3, it does not have the line control device 2. FIG. The reason why the mobile communication station 10-3 is provided with the line control device 2 is that there is a possibility that a plurality of other radio devices 3 will be connected in the future.
  • FIG. 13 is a schematic diagram of the configuration of a conventional wireless device.
  • the conventional radio equipment 3 is composed of a network section 31, a radio access control section 32, a radio signal processing section 33 and a high frequency section .
  • the network unit 31 mainly serves as an interface with a user terminal such as a personal computer, and exchanges network information, so-called IP (Internet Protocol) packets, input from the user terminal with the wireless access control unit 32 via a wire.
  • IP Internet Protocol
  • the radio access control unit 32 determines whether the frequency resource, the so-called radio line, is not in use, or whether it is time for the local station to transmit. As a result of this determination, if it is determined that transmission is possible, after generating frames in which control information is added to IP packets, the frames are concatenated into a plurality of frames, information is encrypted, etc., and radio signal processing is performed. Transfer to section 33 .
  • the radio signal processing unit 33 After performing coding and interleaving for correcting communication errors, the radio signal processing unit 33 performs modulation processing for forming a carrier wave, gives a synchronization signal, a control signal, etc., and sends it to the high frequency unit 34. Forward.
  • the high-frequency unit 34 converts the carrier wave input from the radio signal processing unit 33 into a high-frequency carrier wave, amplifies it to a specified power, and then transmits it from the antenna 35 .
  • the wireless device 3 on the other side receives the high frequency signal at the high frequency unit 34 via the antenna 35 , converts it into a carrier wave, and outputs the carrier wave to the wireless signal processing unit 33 .
  • the radio signal processing unit 33 performs demodulation to detect a synchronization signal and a control signal from the carrier wave, and restores digital information. After the restoration, the erroneous information is corrected and transmitted to the radio access control unit 32 .
  • the radio access control unit 32 decrypts the encrypted digital information as necessary, determines whether the received digital information is a frame, determines whether it is concatenated if it is a frame, and determines whether it is concatenated. If so, disassemble the frame. After that, according to the control information stored in the decomposed frame, response processing, adjustment of transmittable time, and the like are performed. Also, if an IP packet is stored in the frame, it is output to the network section 31 .
  • the network unit 31 determines from the IP packet received from the wireless access control unit 32 whether the packet is for the user terminal to be connected, and transfers the packet to the user terminal via wire.
  • FIG. 14 is a schematic diagram of the configuration of a conventional line control device.
  • the conventional line control device 2 comprises a network section 21, an access control section 22, and a line connection section 23, as shown in FIG.
  • the network unit 21 includes a network relay unit 21a that performs communication with the communication terminal 1, and a monitor control unit 21b that monitors the network state.
  • the access control unit 22 controls connection between the network unit 21 and each wireless device communication unit in the line connection unit 23 .
  • the line connection unit 23 has a plurality of wireless device communication units corresponding to the plurality of wireless devices 3 .
  • the network relay unit 21 a receives packets from the communication terminal 1 and transfers them to the access control unit 22 .
  • the access control unit 22 outputs the transferred data to each wireless device communication unit in the line connection unit 23 and transfers the data to the wireless device 3 .
  • Data from the wireless device 3 is received by each wireless device communication unit of the line connection unit 23 , output to the network unit 21 via the access control unit 22 , and transferred to the communication terminal 1 .
  • FIG. 15 A conventional transmission/reception frame and transmission/reception data will be described with reference to FIG.
  • FIG. 15 is a schematic diagram showing transmitted/received frames and transmitted/received data.
  • the transmission/reception frames shown in FIG. 15 are between wireless devices, and the transmission/reception data are between communication terminals.
  • a WLAN Wireless Local Area Network
  • the payload portion is data transmitted and received by the communication terminal, and matches the subsequent IP Packet.
  • Source Address and Destination Address are communication terminal IDs, indicating the communication terminal that is the transmission source of the data and the mobile communication terminal that is the final destination.
  • the payload of this IP Packet is TCP Segment and UDP Segment.
  • FIG. 16 is a schematic diagram showing a conventional communication flow.
  • the wireless device 3 exchanges messages with the wireless devices 3 on the same frequency using an ad-hoc routing method (S1, S2, S4, S5). After the image exchange, the wireless device 3 that has collected the mobile network information notifies the line control device 2 of the network connection (S3, S6).
  • the line control device 2 Upon receiving the notification, the line control device 2 receives an IP packet addressed to another mobile communication terminal 1 from the communication terminal (terminal) 1 (S7), and transfers the IP packet to the wireless device 3 (S8, S9).
  • the IP packet is transferred by specifying one wireless device 3 as the transfer destination from the metric (number of relays) information that is an evaluation index. do. If the metric information is the same, the IP packet is transferred to the wireless device 3 that previously notified the network connection.
  • Another mobile wireless device 3 that has received the IP packet transmits the IP packet to the mobile line control device 2 (S10), and the line control device 2 outputs the IP packet to the terminal 1 (S11). ). In this way conventional communication takes place.
  • Patent Document 1 International Publication No. 2019/058418 "Communication Device”
  • Patent Document 2 International Publication No. 2021/024353 “Communication Device, Communication System and Communication Method”
  • Patent Document 3 International Publication There is No. 2021/161493 entitled “Wireless Communication Apparatus and Wireless Communication Method”
  • Patent Literature 1 discloses a communication device that determines whether or not communication control information can be compressed based on the exchange of routing control information using an ad-hoc routing protocol, and performs compression.
  • Patent Literature 2 discloses a communication device that is used in a wireless communication system using ad-hoc routing and stabilizes a communication link of the communication device.
  • Patent Literature 3 discloses a wireless communication device that divides a divisible IP packet to generate multiplexed cells, concatenates and transmits the multiplexed cells according to the transmission capacity determined by the communication situation. .
  • the conventional wireless communication system uses only one wireless device and does not consider stable communication using a plurality of wireless devices. Ta.
  • Patent Documents 1 to 3 do not describe a configuration for performing highly efficient or highly reliable communication by effectively using a plurality of wireless devices in one data transfer.
  • the present invention has been made in view of the above circumstances, and aims to provide a wireless communication system that effectively utilizes multiple wireless devices to achieve high-speed or highly reliable communication.
  • the present invention provides a mobile communication station having a plurality of wireless devices, a line control device for controlling the lines of the wireless devices, and a communication terminal connected to the line control device.
  • a wireless communication system that communicates via a network, in which a line control device of a mobile communication station on the transmitting side is set according to a first communication method or a second communication method set by a communication terminal on the transmitting side. is generated, the packet is transmitted from a plurality of radio devices in the mobile communication station on the transmitting side, and the line control device of the mobile communication station on the receiving side transmits the packet to the plurality of radio devices in the mobile communication station on the receiving side that received the packet.
  • a packet is input from the device, and if the communication method of the packet is the first communication method, the first normally received packet is output to the communication terminal on the receiving side, and if the communication method of the packet is the second communication method.
  • the packets are rearranged in order of transmission and output to the communication terminal on the receiving side.
  • the line control device on the transmitting side transmits packets in which the same identifier and different sequence numbers are assigned to transmission data from a plurality of wireless devices on the transmitting side to the receiving side.
  • the line control device on the receiving side rearranges the packets received by the radio device on the receiving side in order of the sequence numbers.
  • the line control device on the transmitting side receives packets in which the same identifier and the same sequence number are assigned to the transmission data from the plurality of wireless devices on the transmitting side.
  • a packet is transmitted to a plurality of wireless devices on the receiving side, and the line control device on the receiving side adopts the first received packet among the packets received by the wireless device on the receiving side, and performs processing to discard packets other than this packet. .
  • information on the communication type of the first communication method or the second communication method is set in the generated packet, and the line control device on the receiving side determines the communication type in the packet. information is acquired and reception is performed by the corresponding communication method.
  • the line control device on the transmitting side performs transmission processing in accordance with the first communication method or the second communication method according to the communication quality of a plurality of wireless devices on the transmitting side.
  • a line control device of a mobile communication station on the transmitting side generates a packet of a communication method set according to a first communication method or a second communication method set by a communication terminal on the transmitting side, The packet is transmitted from a plurality of radio devices in the mobile communication station on the transmitting side, and the line control device of the mobile communication station on the receiving side inputs the packet from the plurality of radio devices in the mobile communication station on the receiving side.
  • the packet communication method is the first communication method
  • the first normally received packet is output to the communication terminal on the receiving side
  • the packet communication method is the second communication method
  • the transmission order is rearranged Since the wireless communication system outputs packets to the communication terminal on the receiving side, it is possible to effectively use a plurality of wireless devices and realize highly efficient or highly reliable communication.
  • FIG. 10 is a flowchart showing transmission processing (1);
  • FIG. 10 is a flowchart showing transmission processing (2);
  • FIG. 10 is a flow diagram showing transmission processing (3);
  • FIG. 10 is a flow chart showing transmission processing (4);
  • FIG. 4 is a flow diagram showing reception processing (1);
  • FIG. 10 is a flow diagram showing reception processing (2);
  • 1 is a diagram showing an example of a general ad-hoc network;
  • FIG. 1 is a schematic configuration diagram of a radio communication system
  • FIG. 1 is a schematic configuration diagram of a conventional wireless device
  • FIG. 1 is a schematic configuration diagram of a conventional line control device
  • FIG. 2 is a schematic diagram showing transmitted/received frames and transmitted/received data
  • 1 is a schematic diagram showing a conventional communication flow
  • a line control device of a mobile communication station on the transmitting side is configured to transmit data from a communication terminal on the transmitting side to a first communication (high reliability/HRE communication) method or a second communication method.
  • high rate/HRA communication high rate/HRA communication
  • a packet of the set communication method is generated, the packet is transmitted from a plurality of wireless devices in the mobile communication station on the transmitting side, and the mobile communication station on the receiving side
  • a line control unit inputs packets from a plurality of radio units in the mobile communication station on the receiving side that received the packets, and if the communication method of the packets is the first communication method, the first normally received packet is sent to the receiving side.
  • the communication method of the packet is the second communication method
  • the packets are rearranged in order of transmission and output to the communication terminal on the receiving side, so multiple wireless devices can be effectively used. Therefore, highly efficient or highly reliable communication can be realized.
  • the high-reliability communication means that packets in which the same ID and the same sequence number are assigned to single data are duplicated and transmitted from a plurality of wireless devices to the corresponding wireless devices of the other party, and the line control of the other party is performed.
  • This is a communication method in which the device adopts and acquires the first received packet, and discards the other packets.
  • high-speed (high-efficiency) communication means that packets in which the same ID and different sequence numbers are assigned to continuous data are transmitted from a plurality of wireless devices to corresponding wireless devices of the other party, and the line control device of the other party. This is a communication method in which packets are rearranged in order of sequence numbers and acquired.
  • This radio communication system is based on the configuration shown in FIG. is effective.
  • FIG. 1 is a schematic diagram of the configuration of this line control device.
  • the line control device 2 basically has a network section 21, an access control section 22, and a line connection section 23. It controls line connection between 3 and communication terminal 1 .
  • the network unit 21 of the line control device 2 includes a network relay unit 21a that performs communication with the communication terminal 1, and a monitor control unit 21b that monitors the network state.
  • the monitor-and-control unit 21b enables high-reliability communication within the access control unit 22, which is a feature of the present embodiment.
  • the line connection unit 23 has a plurality of wireless device communication units corresponding to the plurality of wireless devices 3 .
  • the line connection unit 23 has a plurality of wireless device communication units corresponding to the plurality of wireless devices 3 .
  • multiple wireless device communication units and corresponding wireless devices 3 are used for one related data transfer.
  • the access control unit 22 controls connection between the network unit 21 and each wireless device communication unit in the line connection unit 23 .
  • the high-reliability/high-speed communication control unit 22a in the access control unit 22 receives an IP packet from the network relay unit 21, the user instructs high-reliability communication or high-speed communication via the monitoring control unit 21a.
  • a WHR (Wireless High Reliability Packet)-VPN (Virtual Private Network) packet shown in FIG. 2 is generated. This WHR-VPN packet is given information of high-reliability communication or high-speed communication (high-rate communication).
  • FIG. 2 is a schematic diagram showing a WHR-VPN packet.
  • a WHR-VPN packet consists of a WHR-VPN IP Packet Header and a WHR-VPN IP Packet Payload, as shown in FIG.
  • the WHR-VPN packet uses the IP packet input from the communication terminal 1 as the Original IP Packet, adds Routing Label, UUID (Universally Unique Identifier) Number, Sequence Number, and Time Stamp to the VPN IP Packet Payload, and further adds it to It is assumed that the packet is packed (encapsulated) in an IP packet for a line control device connected to a terminal of another mobile device as a destination.
  • Routing Label UUID (Universally Unique Identifier) Number
  • Sequence Number Sequence Number
  • Time Stamp Time Stamp
  • Labeling types include HRE (High Reliability Packet) and HRA (High Rate Packet).
  • HRE is labeled as a packet for reliable communication (high reliability packet)
  • HRA is labeled as a high rate communication packet (high rate packet).
  • the line control device 2 on the transmitting side duplicates a packet with the same UUID and Sequence Number for single data and transmits it from a plurality of radio devices 3 with different frequencies, and the corresponding radio device on the receiving side 3 receives and outputs to the line control device 2, and when the line control device 2 receives duplicate packets, it adopts the packet received earlier and discards the packet received later for communication. It outputs to the terminal 1.
  • the flow of highly reliable communication will be described later.
  • the line control device 2 on the transmitting side transmits packets with the same UUID and different Sequence Numbers for related continuous data from a plurality of radio devices 3 with different frequencies, and the corresponding radio device on the receiving side 3 receives the packets and outputs them to the line control device 2, and the packets received by the line control device 2 are rearranged in the order of the Sequence Number and output to the communication terminal 1 as a series of data packets.
  • the flow of high-rate communication will be described later.
  • the UUID Number is information obtained by synthesizing the unique ID of the line control device 2 and the ID information associated with each TCP and UDP segment shown in FIG. Sequence Number sets the cycle number associated with the UUID Number, and Time Stamp sets the WHR-VPN packet generation time.
  • the network relay section 21 a receives a packet from the communication terminal 1 and transfers it to the access control section 22 .
  • the user sets high-reliability communication or high-rate communication to the high-reliability/high-speed communication control unit 22a via the monitoring control unit 21b, IP packets are generated according to the setting, and Controls communication.
  • IP packets are generated according to the setting, and Controls communication.
  • the access control unit 22 outputs the transferred data to each wireless device communication unit in the line connection unit 23 and transfers the data to the wireless device 3 .
  • Data from the wireless device 3 is received by each wireless device communication unit of the line connection unit 23 , output to the network unit 21 via the access control unit 22 , and transferred to the communication terminal 1 .
  • the high-reliability/high-speed communication control unit 22a of the access control unit 22 of the line control device 2 on the receiving side refers to the Routing Label of the received IP packet, determines high-reliability communication or high-rate communication, and controls the corresponding reception. I do.
  • FIG. 3 is a schematic diagram showing the flow of HRE (High Reliability) packet transmission/reception.
  • the user sets high-reliability communication to the line control device 2 for data addressed to mobile #2 terminal (S01).
  • Subsequent ad-hoc routing message exchange and network connection notification are performed in the same manner as in FIG. 15 (S1 to S6).
  • the line control device 2 of the mobile unit #1 inquires of the line control unit 2 of the mobile unit #2 whether it supports HRE communication or HRA communication using a WHR Discovery message (S21-S23). Then, a reply is obtained from the line control device 2 of the mobile unit #2 using a WHR Discovery message (S24-S26).
  • the HRE packet is input from the terminal 1 (S35), and the HRE packet is sent to the wireless device #F1 and the wireless device #F2. (S36, S37), and an HRE packet is transmitted from each wireless device to the corresponding wireless device of mobile #2 (S38, S40).
  • the radio equipment of mobile unit #2 transmits the received HRE packet to the line control unit 2 of mobile unit #2 (S39, S42), and the line control unit 2 adopts the first received HRE packet to the terminal. 1, and the HRE packet received after that is discarded and not transmitted to terminal 1.
  • the transmitting side uses a plurality of wireless devices 3 to transmit the same data through a plurality of wireless routes, and the receiving side receives the same data using a plurality of wireless devices 3 through different wireless routes. This increases the probability that data transmitted via any wireless route will be received normally, thus achieving high reliability.
  • FIG. 4 is a schematic diagram showing the flow of HRA (high rate) packet transmission and reception.
  • the user sets high-rate (high-throughput) communication to the line control device 2 for data addressed to mobile #2 terminal (S02).
  • S1-S6 ad-hoc routing message exchange and notification of network connection
  • S21-S26 inquiry and response using the WHR Discovery message
  • the line controller 2 of the mobile unit #1 determines that the HRA packet can be transmitted to the mobile unit #2
  • the HRA packet is input from the terminal 1 (S45), and the HRA packet is sent to the wireless units #F1 and #F2. (S46, S47), and an HRA packet is transmitted from each wireless device to the corresponding wireless device of mobile #2 (S48, S50).
  • the radio equipment of mobile unit #2 transmits the received HRA packet to the line control unit 2 of mobile unit #2 (S49, S51), and the line control unit 2 stores the received HRA packet and sets Sequence Number. is confirmed, rearranged so as to be in the order of SequenceNumber and output the IP packet to terminal 1.
  • the transmitting side attaches the same ID and different sequence numbers to a series of related data and transmits them from a plurality of wireless devices through different wireless routes, Since the related data are received by different wireless routes and rearranged in order of sequence numbers, the related data can be transmitted in parallel, thereby achieving high speed.
  • Communication quality information collected by the line control device 2 from the radio device 3 includes, for example, RSSI (Received Signal Strength Indicator), number of received subcarriers, equalization error, line usage rate, and combinations thereof.
  • RSSI is the received signal strength
  • the number of received subcarriers is the number of effective subcarriers in OFDM and OFDMA, and is the number of effective subcarriers per symbol when received
  • the equalization error is the frequency characteristic.
  • the line utilization rate is the radio line utilization rate, which is calculated from the carrier detection time for each single time.
  • FIG. 5 is a flow diagram showing transmission processing (1)
  • FIG. 6 is a flow diagram showing transmission processing (2)
  • FIG. 7 is a flow diagram showing transmission processing (3)
  • FIG. FIG. 4 is a flowchart showing transmission processing (4); 5 to 8 are connected by a series of processes.
  • each wireless device checks whether network connection to the target mobile unit has been established (S101).
  • the confirmation process is performed by exchanging messages by ad-hoc routing or the like.
  • the line control device 2 determines whether a plurality of wireless devices 3 are connected to the target mobile network (S102).
  • the process proceeds to (A). If a plurality of wireless devices 3 are connected to the target mobile network (Yes), the mobile network information notified from the mobile communication station of the target mobile is checked (S103). The information obtained here is the reply to the WHR Discovery message.
  • the arrival index (metric: number of relays) of the mobile network connection has the same value (S104). If the metrics are the same value (Yes), the transfer setting information for the target destination of the target mobile unit in the line control device 2 is confirmed (S105), and the process proceeds to (B). If the metrics are not the same value (if No), the wireless device 3 to be transferred is designated as the wireless device 3 with the smaller metric (S106), and the process proceeds to (A).
  • the line control device 2 determines the contents of the transfer setting information from (B) shown in FIG. 5 (S201). If “high efficiency transfer (HRA communication)" is set in the transfer setting information, the process proceeds to (C). Also, when the "target wireless device” is set, the process proceeds to (A). This (A) is the same as (A) in FIG.
  • the judgment processing S201 when "automatic" is set in the judgment processing S201, the following processing is started for each number of wireless devices 3 that are notification sources of the mobile network (S202). First, the quality information of the wireless device 3 is confirmed (S203). In order to perform HRE communication or HRA communication, communication quality needs to satisfy the conditions. As confirmation processing, it is determined whether or not the number of subcarriers received from the target mobile unit is equal to or greater than a specific number (threshold value/SCth) (S204).
  • a specific number threshold value/SCth
  • step S208 If the number of received subcarriers is less than SCth (No), the process proceeds to step S208. If the number of received subcarriers is greater than or equal to SCth (Yes), the RSSI and equivalent error average and coefficient of variation are calculated (S205). Then, the average line usage rate and coefficient of variation are calculated (S206), and registered as the wireless device 3 to be transferred (S207). The above processing is performed for the number of wireless devices 3 that are notification sources of the mobile network, the processing ends (S208), and the process proceeds to (D).
  • the line control device 2 determines the number of wireless devices 3 to be transferred (S301). If the number of wireless devices 3 to be transferred is "0", the wireless device 3 with the highest RSSI average is designated as the target wireless device (S302), and the process proceeds to (A). (A) is the same as (A) in FIGS. Also, when the number of wireless devices 3 to be transferred is "one", the process proceeds to (A).
  • the processing for the number of wireless devices to be transferred or less is started (S303). First, it is determined whether the average RSSI is less than or equal to a specific value (threshold/RssiTH) or whether the coefficient of variation is greater than or equal to a specific value (threshold/RssiCV) (S304). If the RSSI average is neither less than or equal to the specific value and the coefficient of variation is neither greater than or equal to the specific value (No), the process proceeds to step S306.
  • the line is registered as a low-quality wireless line (S305).
  • the line control device 2 confirms the number of high-quality wireless lines (S401). If there are "two or more" high-quality wireless lines, go to (C). (C) is the same as (C) in FIG. Then, the HRA packet is transferred to the HRA (high rate) target wireless device 3 (S402), and the process ends.
  • step S404 the line control device 2 confirms the number of low-quality wireless lines (S404). If the number of low-quality wireless lines is "1 line”, the process proceeds to step S403; (High Reliability Communication) The HRE packet is transferred to the target wireless device 3 (S405), and the process ends. In step S405, if the average line usage rate is 59% or higher, one line with the lowest usage rate is selected, and data is transferred to the target wireless device 3 using conventional IP packets. End the process. As described above, the transmission processing as shown in FIGS. 5 to 8 is performed.
  • FIG. 9 is a flowchart showing reception processing (1)
  • FIG. 10 is a flowchart showing reception processing (2).
  • the line control device 2 checks the received packet (S501). Then, the packet type is determined (S501). Reception processing corresponding to an HRA packet, an HRE packet, or a normal IP packet is performed depending on the determined packet type.
  • the packet is transferred to the wired side (communication terminal 1) as it is (S503), and the process ends. If the packet type is "HRA packet”, the Sequence Number is divided by the buffer size N (S504) to obtain the Sequence Head. This Sequence Head is used in the processing described later.
  • HRA Hash list HRA hash value list
  • S506 HRA Hash list
  • S507 HR list in the HASH entry
  • G The HR list is a list of Sequence Number, Time Stamp, and extracted IP packets. Also, if it is not registered in the HRA Hash list, move to (H).
  • the packet type is "HRE packet”
  • the data matching the UUID and Sequence Number is checked from the HRE hash value list (HRE Hash list) (S508). Then, it is determined whether the UUID and Sequence Number have been registered in the HRE Hash list (S509). If not registered, the process proceeds to (I). S510), the process ends.
  • the line control device 2 determines whether or not the same sequence number is registered (S511). If registered, the received HRA packet is discarded (S512), and the process ends. If not registered, the Sequence Number, extracted IP packet, and Time Stamp are registered in the HR list (S513).
  • step S514 it is determined whether or not all packets from Sequence Head to buffer size N have been registered. If the result of determination in step S514 is that registration has not been completed, the processing is terminated. If registration has been completed, the packets in the HR list are sorted in ascending order by Time Stamp, and the IP packets are sequentially transferred to communication terminal 1 (S515). exit.
  • a list (HR list) of Sequence Number, Time Stamp, and extracted IP packets is generated using UUID and Sequence Head as keys in the HR list. Register (S516) and terminate the process. Further, continuing from (I) of FIG. 9, if unregistered in determination processing S509, the UUID and Sequence Number in the header of the HRE packet are registered in the HRE hash list (S516), the IP packet is extracted from the HRE packet, and communication is performed. The data is transferred to terminal 1 (S518), and the process ends.
  • FIGS. 9 and 10 determines whether the received WHR packet is an HRE packet, an HRA packet, or a normal packet. Generate a cache list of received packets in each of the HRE and HRA. In the case of HRE, register the UUID and Sequence Number of the received HRE packet in the cache list, discard the registered packet if received, and extract the IP packet if it is an unregistered packet. , to the communication terminal 1.
  • HRA an HR list is generated from the UUID of the received packet, and the Sequence Number, Time Stamp, and IP packet are stored in the HR list of buffer size N.
  • the HRA buffer is received up to the buffer size N, and upon successful reception of all packets, the communication order is changed according to the Time Stamp, etc., and then transferred to the communication terminal 1 .
  • the line control device 2 of the mobile communication station on the transmitting side is set according to the high reliability (HRE) communication method or the high speed (HRA) communication method set by the communication terminal 1 on the transmitting side. is generated, the packet is transmitted from a plurality of wireless devices 3 in the mobile communication station on the transmitting side, and the line control device 2 in the mobile communication station on the receiving side transmits the packet to the plurality of mobile communication stations on the receiving side that received the packet.
  • the packet communication method is the HRE communication method
  • the first normally received packet is output to the communication terminal 1 on the receiving side
  • the packet communication method is the HRA communication method.
  • the packets are rearranged in order of transmission and output to the communication terminal 1 on the receiving side, there is an effect that high-speed or highly reliable communication can be realized by effectively using a plurality of wireless devices.
  • the present invention is suitable for wireless communication systems that effectively utilize multiple wireless devices to achieve high-speed or highly reliable communication.

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

Abstract

L'objectif de l'invention est de fournir un système de communication sans fil qui réalise une communication à haute fiabilité ou à grande vitesse en utilisant efficacement une pluralité de dispositifs sans fil. À cet effet, l'invention concerne un système de communication sans fil qui est configuré de sorte que : un dispositif de commande de ligne (2) du côté transmission génère des paquets conformément à un procédé de communication à haute fiabilité (HRE) ou à un procédé de communication à grande vitesse (HRA) et amène une pluralité de dispositifs sans fil (3) du côté transmission à transmettre les paquets ; et un dispositif de commande de ligne (2) du côté réception reçoit les paquets en tant qu'entrée d'une pluralité de dispositifs sans fil (3) du côté réception, qui ont reçu les paquets, transmet un paquet, qui a été reçu normalement en premier, à un terminal de communication (1) du côté réception dans un cas où le procédé de communication par paquets est le procédé de communication HRE, et réagence les paquets dans un ordre de transmission et transmet les paquets au terminal de communication (1) du côté réception dans un cas où le procédé de communication par paquets est le procédé de communication HRA.
PCT/JP2022/009151 2022-03-03 2022-03-03 Système de radiocommunication WO2023166667A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11355300A (ja) * 1998-06-10 1999-12-24 Kubota Corp 無線通信システム
JP2004266545A (ja) * 2003-02-28 2004-09-24 Mitsumi Electric Co Ltd データ通信システム及びデータ通信方法
JP2005072878A (ja) * 2003-08-22 2005-03-17 Nippon Telegr & Teleph Corp <Ntt> 伝送モード選択方法および無線通信装置
JP2008099085A (ja) * 2006-10-13 2008-04-24 Mitsubishi Electric Corp 無線通信用車載器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11355300A (ja) * 1998-06-10 1999-12-24 Kubota Corp 無線通信システム
JP2004266545A (ja) * 2003-02-28 2004-09-24 Mitsumi Electric Co Ltd データ通信システム及びデータ通信方法
JP2005072878A (ja) * 2003-08-22 2005-03-17 Nippon Telegr & Teleph Corp <Ntt> 伝送モード選択方法および無線通信装置
JP2008099085A (ja) * 2006-10-13 2008-04-24 Mitsubishi Electric Corp 無線通信用車載器

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