WO2024080050A1 - Système de transmission de paquet de commande, procédé de transmission de paquet de commande, et programme de transmission de paquet de commande - Google Patents

Système de transmission de paquet de commande, procédé de transmission de paquet de commande, et programme de transmission de paquet de commande Download PDF

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Publication number
WO2024080050A1
WO2024080050A1 PCT/JP2023/033055 JP2023033055W WO2024080050A1 WO 2024080050 A1 WO2024080050 A1 WO 2024080050A1 JP 2023033055 W JP2023033055 W JP 2023033055W WO 2024080050 A1 WO2024080050 A1 WO 2024080050A1
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WIPO (PCT)
Prior art keywords
packet
request
control
response
wireless communication
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PCT/JP2023/033055
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English (en)
Japanese (ja)
Inventor
耀 川崎
和雄 伊深
誉 村上
武 松村
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国立研究開発法人情報通信研究機構
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Publication of WO2024080050A1 publication Critical patent/WO2024080050A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0457—Variable allocation of band or rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • This invention relates to a control packet transmission system, a control packet transmission method, and a control packet transmission program.
  • TCP Transmission Control Protocol
  • MP-TCP Multi Path - Transmission Control Protocol
  • a method called MP-TCP has been proposed, as disclosed in Non-Patent Document 1.
  • MP-TCP is a transport layer technology that transmits data using communication links with multiple network interfaces, and has been reported to be effective in wired environments such as data centers as well as wireless environments in recent years. It is already supported by iOS and is attracting attention.
  • mobile communication devices such as smartphones generally have multiple network interfaces (e.g. WiFi (Wireless Fidelity) (registered trademark) and cellular, etc.), and it is expected that more interfaces for Beyond 5G systems will be added in the future. For this reason, it is thought that the role that MP-TCP will play in the communications field (e.g. mobile communications) will become increasingly important.
  • the present invention was conceived in consideration of the above-mentioned problems, and its purpose is to provide a control packet transmission system, a control packet transmission method, and a control packet transmission program that can improve throughput while ensuring the reliability of communications using MP-TCP.
  • the control packet transmission system of the first invention is a control packet transmission method for transmitting control packets storing control information between a requesting device that requests control and a responding device that responds to the control request from the requesting device, which constitute a client-server system using MP-TCP and communicate wirelessly via a wireless communication path, and is characterized by comprising a requesting device that transmits, to the responding device via at least one or more wireless communication paths, a plurality of first request packets among the control packets that indicate a request to the responding device, and the responding device that, when the requesting device first receives the first request packet transmitted, transmits, to the requesting device via at least one or more wireless communication paths, a plurality of first response packets among the control packets that indicate a response to the first request packets.
  • the requesting device transmits a plurality of the first request packets, among the control packets, which indicate a request for connection or disconnection to the responding device, to the responding device via at least two or more of the wireless communication paths, and when the responding device first receives the first request packet transmitted by the requesting device, it transmits a plurality of the first response packets to the requesting device via at least one of the at least two or more of the wireless communication paths, and the at least two or more of the wireless communication paths are connected or disconnected when the requesting device first receives the first response packet transmitted by the responding device.
  • the wireless communication path used to transmit the first request packet first received by the responding device and the wireless communication path used to transmit the first response packet first received by the requesting device are wireless communications conforming to different communication standards.
  • the requesting device transmits the first request packet to the responding device multiple times before first receiving the multiple first response packets transmitted in the second packet communication step.
  • the control packet transmission method of the fifth invention is a control packet transmission method for transmitting control packets storing control information between a requesting device that requests control and a responding device that responds to the control request from the requesting device, which constitute a client-server system using MP-TCP and communicate wirelessly via a wireless communication path, characterized in that the control packet transmission method includes a first packet communication step of transmitting, to the responding device via at least one or more wireless communication paths, a plurality of first request packets among the control packets that indicate a request to the responding device, and a second packet communication step of transmitting, to the requesting device via at least one or more wireless communication paths, a plurality of first response packets among the control packets that indicate a response to the first request packets, when the responding device first receives the first request packets transmitted in the first packet communication step.
  • the control packet transmission program of the sixth invention is a control packet transmission program for transmitting control packets storing control information between a requesting device that requests control and a responding device that responds to the control request from the requesting device, which constitute a client-server system using MP-TCP and communicate wirelessly via a wireless communication path, and is characterized in that the program causes a computer to execute a first packet communication step of transmitting, to the responding device via at least one or more wireless communication paths, a plurality of first request packets among the control packets that indicate a request to the responding device, and a second packet communication step of transmitting, to the requesting device via at least one or more wireless communication paths, a plurality of first response packets among the control packets that indicate a response to the first request packets, when the responding device first receives the first request packets transmitted in the first packet communication step.
  • the control packet transmission system includes a requesting device that transmits a plurality of first request packets to a responding device via at least one wireless communication path, and a responding device that transmits a plurality of first response packets to the requesting device via at least one wireless communication path when the first request packet is received.
  • a requesting device that transmits a plurality of first request packets to a responding device via at least one wireless communication path
  • a responding device that transmits a plurality of first response packets to the requesting device via at least one wireless communication path when the first request packet is received.
  • the requesting device transmits a plurality of first request packets indicating a request for connection or disconnection to the responding device via at least two or more wireless communication paths, and when the responding device first receives the first request packet, it transmits a plurality of first response packets to the requesting device via at least one of the at least two or more wireless communication paths, and when the requesting device first receives the first response packet, the at least two or more wireless communication paths are connected or disconnected. Therefore, it is possible to establish connections for a plurality of wireless communication paths based on the transmission and reception of a control packet transmitted via one wireless communication path. This makes it possible to further improve throughput in a client-server system while ensuring the reliability of communication.
  • the wireless communication path used to transmit the first request packet first received by the response device and the wireless communication path used to transmit the first response packet first received by the request device are wireless communications conforming to different communication standards. Therefore, a wireless communication path that is temporarily valid can be selected between the time when the request device transmits the first request packet and the time when the request device receives the first response packet. This makes it possible to more reliably improve throughput in a client-server system that uses mobile communication while ensuring the reliability of communication.
  • the requesting device transmits the first request packet multiple times before receiving the first response packet for the first time in the requesting device. This makes the transmission of the first request packet by the requesting device less susceptible to influences caused by fluctuations in communication quality between wireless communication paths. This makes it possible to improve the accuracy with which the requesting device receives the first response packet more quickly.
  • the control packet transmission method includes a first packet communication step of transmitting a plurality of first request packets to a response device via at least one wireless communication path, and a second packet communication step of transmitting a plurality of first response packets to a request device via at least one wireless communication path when the response device first receives the first request packet.
  • the control packet transmission program causes a computer to execute a first packet communication step of transmitting a plurality of first request packets to a response device via at least one or more wireless communication paths, and a second packet communication step of transmitting a plurality of first response packets to a request device via at least one or more of the wireless communication paths when the response device first receives the first request packet.
  • a first packet communication step of transmitting a plurality of first request packets to a response device via at least one or more wireless communication paths
  • a second packet communication step of transmitting a plurality of first response packets to a request device via at least one or more of the wireless communication paths when the response device first receives the first request packet.
  • FIG. 1 is a schematic diagram showing an example of the configuration of a control packet transmission system according to the first embodiment.
  • FIG. 2 is a schematic diagram showing an example of the configuration of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 3 is a schematic diagram showing an example of a detailed configuration of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 4 is a schematic diagram showing an example of a control packet transmitted by the control packet transmission system in the first embodiment.
  • FIG. 5 is a flowchart showing an example of the operation of the control packet transmission system in the first embodiment.
  • FIG. 6 is a sequence diagram showing an example of detailed operations of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 1 is a schematic diagram showing an example of the configuration of a control packet transmission system according to the first embodiment.
  • FIG. 2 is a schematic diagram showing an example of the configuration of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 3 is a schematic diagram showing an example of
  • FIG. 7 is a sequence diagram showing a first modified example of the detailed operation of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 8 is a sequence diagram showing a second modified example of the detailed operation of each device constituting the control packet transmission system in the first embodiment.
  • FIG. 9 is a flowchart showing an example of the operation of the control packet transmission system in the second embodiment.
  • FIG. 10 is a sequence diagram showing an example of detailed operations of each device constituting the control packet transmission system in the second embodiment.
  • FIG. 11 is a sequence diagram showing a first modified example of the detailed operation of each device constituting the control packet transmission system in the second embodiment.
  • FIG. 12 is a sequence diagram showing a second modified example of the detailed operation of each device constituting the control packet transmission system in the second embodiment.
  • FIG. 13 is a schematic diagram showing an example of a detailed configuration of each device constituting the control packet transmission system in the third embodiment.
  • FIG. 14 is a sequence diagram showing an example of detailed operations of each device constituting the control packet transmission system in the third embodiment.
  • FIG. 15 is a sequence diagram showing a modification of the detailed operation of each device constituting the control packet transmission system in the third embodiment.
  • FIG. 1 is a schematic diagram showing an example of the configuration of the control packet transmission system 100 in this embodiment.
  • Figure 2 is a schematic diagram showing an example of the configuration of each of the devices 1 and 2 that make up the control packet transmission system 100 in this embodiment.
  • Figure 3 is a schematic diagram showing an example of the detailed configuration of each of the devices 1 and 2 that make up the control packet transmission system 100 in this embodiment.
  • the control packet transmission system 100 includes a requesting device 1, a responding device 2, and a plurality of wireless communication paths 3 that connect the requesting device 1 and the responding device 2 so that they can communicate with each other.
  • the control packet transmission system 100 is a client-server system that wirelessly communicates using MP-TCP (Multi Path-Transmission Control Protocol).
  • MP-TCP Multi Path-Transmission Control Protocol
  • a control packet refers to a packet that includes control information of each device that constitutes the client-server system.
  • the requesting device 1 and the responding device 2 that constitute the client-server system transmit control packets to each other via at least one or more wireless communication paths 3.
  • the client-server system is, for example, composed of one or more clients and one server.
  • connection form of each device 1, 2 in the client-server system examples include a bus type and a star type.
  • a bus type examples include a bus type and a star type.
  • any of the devices 1, 2 may be composed of multiple devices.
  • the requesting device 1 transmits a control packet to the responding device 2 via at least one wireless communication path 3.
  • the requesting device 1 is, for example, a client device constituting a client-server system, and transmits the generated control packet to a server constituting the system.
  • the requesting device 1 is, for example, an electronic device such as a laptop (notebook) PC or a desktop PC.
  • the requesting device 1 generates a number of control packets indicating a request from the requesting device 1 to the responding device 2 via at least one wireless communication path 3, and transmits them to the responding device 2.
  • the requesting device 1 may be, for example, a server device that constitutes a client-server system, in which case the generated control packet is sent to a client device that constitutes the system.
  • the requesting device 1 includes a housing 10, a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a storage unit 104, and I/Fs 105 to 107.
  • Each component 101 to 107 is connected by an internal bus 110.
  • CPU 101 controls the entire requesting device 1.
  • ROM 102 stores the operation code of CPU 101.
  • RAM 103 is a working area used when CPU 101 is operating.
  • the storage unit 104 stores various information such as databases and learning target data.
  • a data storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive) is used.
  • the requesting device 1 may have a GPU (Graphics Processing Unit) not shown.
  • the I/F 105 is an interface for transmitting and receiving various information to and from the responding device 2 as necessary via the wireless communication path 3.
  • the I/F 106 is an interface for transmitting and receiving information to and from the input unit 108.
  • a keyboard is used as the input unit 108, and an operator of the requesting device 1 inputs various information or control commands for the requesting device 1 via the input unit 108.
  • the I/F 107 is an interface for transmitting and receiving various information to and from the display unit 109.
  • the display unit 109 displays the various information stored in the storage unit 104.
  • a display is used as the display unit 109, and in the case of a touch panel type, for example, it is provided integrally with the input unit 108.
  • the requesting device 1 has a first packet communication unit 11, as shown in FIG. 3, for example.
  • the requesting device 1 may have a first packet generation unit 12 and a first packet storage unit 13, for example.
  • Each component 11, 12, 13 is realized by the CPU 101 using the RAM 103 as a working area to execute a program stored in the storage unit 104 or the like.
  • the requesting device 1 may transmit a control packet generated by a device other than the requesting device 1, or may transmit a control packet stored in a device other than the requesting device 1.
  • the first packet communication unit 11 receives a control packet, it is assumed that the requesting device 1 has received the control packet.
  • the first packet communication unit 11 transmits a control packet to the response side device 2 via at least one or more wireless communication paths 3.
  • the first packet communication unit 11 has, for example, a main flow TCP111, which has a subflow TCP112 and a subflow TCP113. Addresses A1 and A2 are set in the subflows TCP112 and 113. When either of the subflows TCP112 and 113 receives a control packet, it is considered that the first packet communication unit 11 has received the control packet.
  • Subflow TCP112 is connected to subflow TCP212 of the second packet communication unit 21 of the responding device 2, which will be described later, via the first wireless communication path 3a.
  • the first packet communication unit 11 transmits a control packet from subflow TCP112 to subflow TCP212 via the first wireless communication path 3a.
  • Subflow TCP113 is connected to subflow TCP213 of the second packet communication unit 21 of the responding device 2, which will be described later, via the second wireless communication path 3b.
  • the first packet communication unit 11 transmits a control packet from subflow TCP113 to subflow TCP213 via the second wireless communication path 3b.
  • the first packet generator 12 generates, for example, a plurality of control packets indicating a request from the requesting device 1 to the responding device 2 .
  • the first packet storage unit 13 stores, for example, a control packet generated by the first packet generation unit 12.
  • the first packet storage unit 13 stores various control packets acquired or generated by each of the components 11 and 12 in the storage unit 104 as necessary.
  • the response device 2 transmits a control packet to the request device 1 via at least one wireless communication path 3.
  • the response device 2 is, for example, a server device constituting a client-server system, and transmits the generated control packet to a client constituting the system.
  • the response device 2 is, for example, an electronic device such as a laptop (notebook) PC or a desktop PC.
  • the responding device 2 generates multiple control packets indicating a response to a request from the requesting device 1 to the responding device 2 via at least one wireless communication path 3, and transmits them to the requesting device 1.
  • the responding device 2 may be, for example, a client device that constitutes a client-server system, in which case it transmits the generated control packet to a server that constitutes the system.
  • the responding device 2 has the same configuration as the requesting device 1 shown in FIG. 2, for example, and includes a housing (not shown) corresponding to housing 10, a CPU (not shown) corresponding to CPU 101, a ROM (not shown) corresponding to ROM 102, a RAM (not shown) corresponding to RAM 103, a storage unit (not shown) corresponding to storage unit 104, and one or more I/Fs (not shown) corresponding to I/Fs 105 to 107. These components are connected by an internal bus (not shown) corresponding to internal bus 110. Furthermore, the functions of these components of the responding device 2 are assumed to be similar to those of the corresponding components of the requesting device 1, for example, and description thereof will be omitted.
  • the responding device 2 has a second packet communication unit 21, as shown in FIG. 3, for example.
  • the responding device 2 may have a second packet generation unit 22 and a second packet storage unit 23, for example.
  • Each of the components 21, 22, and 23 is realized by the CPU in the responding device 2 executing a program stored in a storage unit or the like, using the RAM as a working area.
  • the responding device 2 may transmit a control packet generated by a device other than the responding device 2, or may transmit a control packet stored in a device other than the responding device 2.
  • the second packet communication unit 21 receives a control packet, it is assumed that the responding device 2 has received the control packet.
  • the second packet communication unit 21 transmits a control packet to the request side device 1 via at least one or more wireless communication paths 3.
  • the second packet communication unit 21 has, for example, a main flow TCP 211, which has a subflow TCP 212 and a subflow TCP 213. Addresses B1 and B2 are set in the subflows TCP 212 and 213. When either of the subflows TCP 212 and 213 receives a control packet, it is considered that the second packet communication unit 21 has received the control packet.
  • the subflow TCP212 is connected to, for example, the subflow TCP112 of the first packet communication unit 11 of the requesting device 1 via the first wireless communication path 3a.
  • the second packet communication unit 21 transmits a control packet from the subflow TCP212 to the subflow TCP112 via the first wireless communication path 3a.
  • Subflow TCP213 is connected, for example, to subflow TCP113 of the first packet communication unit 11 of the requesting device 1 via the second wireless communication path 3b.
  • the second packet communication unit 21 transmits a control packet from subflow TCP213 to subflow TCP113 via the second wireless communication path 3b.
  • the second packet generator 22 generates a plurality of control packets indicating a response to a request from the request side device 1 to the response side device 2, for example.
  • the second packet storage unit 23 stores, for example, a control packet generated by the second packet generation unit 22.
  • the second packet storage unit 23 stores various control packets acquired or generated by each of the components 21 and 22 in a storage unit (not shown) that configures the response side device 2 as necessary.
  • the wireless communication path 3 connects the requesting device 1 and the responding device 2 so that they can communicate with each other wirelessly. Since the present invention uses MP-TCP, the control packet transmission system 100 has a plurality of wireless communication paths 3 that can communicate with each other, and one or more of the wireless communication paths 3 are selected during wireless communication. Examples of the wireless communication paths 3 include wireless communication that complies with standards such as 3G, 4G, 5G, LTE (Long Term Evolution), WiFi (registered trademark), Bluetooth (registered trademark), and Wigig (Wireless Gigabit) (registered trademark).
  • multiple wireless communication paths 3 refer to, for example, a combination of different wireless communication paths 3 from the examples of wireless communication paths 3 listed above.
  • wireless communication path 3a and wireless communication path 3b are wireless communications that comply with different standards and have different communication speeds, for example.
  • the control packet transmission system 100 may select one or more arbitrary wireless communication paths 3 depending on the communication speed and communication quality of each wireless communication path 3a, 3b at the time of transmitting the control packet.
  • Fig. 4 is a schematic diagram showing an example of a control packet transmitted by the control packet transmission system 100 in this embodiment.
  • Fig. 5 is a flowchart showing an example of the operation of the control packet transmission system 100 in this embodiment.
  • Fig. 6 is a sequence diagram showing an example of detailed operation of each of the devices 1 and 2 constituting the control packet transmission system 100 in this embodiment.
  • Fig. 7 is a sequence diagram showing a first modified example of the detailed operation of each of the devices 1 and 2 constituting the control packet transmission system 100 in this embodiment.
  • Fig. 8 is a sequence diagram showing a second modified example of the detailed operation of each of the devices 1 and 2 constituting the control packet transmission system 100 in this embodiment.
  • the control packet transmission system 100 is executed, for example, via a control packet transmission program installed in each device.
  • control packet D1 transmitted and received in the control packet transmission system 100 includes a request packet D11 and a response packet D12, for example, as shown in FIG. 4.
  • the request packet D11 is a control packet, among the control packets D1, which indicates a request from the requesting device 1 to the responding device 2.
  • Examples of the request packet D11 include a SYN packet indicating a request for a communication connection to the responding device 2, a PSH packet indicating a request to the responding device 2 to promptly hand over received data to the application layer, a URG packet indicating a request for urgent processing of data, a FIN packet indicating a request to the responding device 2 to disconnect communication, and the like.
  • the request packet D11 may include a request from the responding device 2 to the requesting device 1, as well as a request from the requesting device 1 to the responding device 2.
  • a control packet indicating a request from the requesting device 1 to the responding device 2 is called a first request packet D111
  • a control packet indicating a request from the responding device 2 to the requesting device 1 is called a second request packet D112.
  • the request packet D11 is a SYN packet
  • a connection has not been established between the devices 1 and 2 at the time the request packet D11 is sent, and that a connection is established between the devices 1 and 2 at the time an affirmative response is made to the request packet D11.
  • the request packet D11 is a control packet other than a SYN packet (such as the above-mentioned PSH packet, URG packet, FIN packet, etc.)
  • a connection has already been established between the devices 1 and 2.
  • the response packet D12 is a control packet, among the control packets D1, that indicates a response to a request from the requesting device 1 to the responding device 2.
  • Examples of the response packet D12 include an ACK packet that indicates a positive response to a request to the responding device 2, a NACK packet that indicates a negative response to a request to the responding device 2, and an RST packet that indicates a response to a connection request to the responding device 2 or a unilateral disconnection to the connection state.
  • the response packet D12 may include a response to a request from the responding device 2 to the requesting device 1.
  • a control packet indicating a response to a request from the requesting device 1 to the responding device 2 is referred to as a first response packet D121
  • a control packet indicating a response to a request from the responding device 2 to the requesting device 1 is referred to as a second response packet D122.
  • the operation of the control packet transmission system 100 includes a first packet communication step S11 and a second packet communication step S12, as shown in FIG. 5, for example.
  • a plurality of first request packets D111 (D111a, D111b) are generated in the first packet generation unit 12, or a plurality of first request packets D111 generated outside the control packet transmission system 100 are stored in the first packet storage unit 13.
  • a first packet communication step S11 is performed.
  • the first packet communication unit 11 transmits at least two or more first request packets (D111a, D111b, ...) indicating a request from the request side device 1 to the response side device 2, among the control packets D1, to the response side device 2 via at least two or more wireless communication paths 3 (3a, 3b ...), as shown in FIG. 6, for example.
  • the risk caused by the packet communication speed of the wireless communication path 3 can be reduced. This allows further improvement of the throughput.
  • the number of first request packets D111 is 2, and the number of wireless communication paths 3 is 2.
  • time T indicates the passage of time in ascending order (T1, T2, T3, ).
  • time T, time T3a, T3b, and T3c indicate that the same process is performed at different times, and the same applies to other times. The same applies in the following description.
  • the multiple first request packets D111 may be transmitted simultaneously from the requesting device 1, for example, or the multiple first request packets D111 (D111a, D111b, ...) may be transmitted sequentially in time series with a time difference (for example, within about one second), and so on.
  • the first request packet D111a is transmitted via the first wireless communication path 3a
  • the first request packet D111b is transmitted via the second wireless communication path 3b, but the combination of each wireless communication path 3 (3a, 3b, ...) and each first request packet D111 (D111a, D111b, ...) may be freely interchanged.
  • a second packet communication step S12 is performed.
  • the second packet communication unit 21 when the second packet communication unit 21 first receives a first request packet D111 transmitted from the first packet communication unit 11, the second packet communication unit 21 transmits a plurality of first response packets D121 indicating the contents of responses to the first request packet D111 to the requesting device 1 via at least one wireless communication path 3.
  • the time when the first request packet D111 is first received refers to the time when any of the first request packets D111 is first received in the second packet communication unit 21 after any of the first request packets D111 is transmitted in the first packet communication unit 11, regardless of the timing of transmission of the multiple first request packets D111 (D111a, D111b, ...) transmitted from the first packet communication unit 11.
  • the second packet communication unit 21 receives the first request packet D111b at time T2, and then receives the first request packet D111a at time T4.
  • the first request packet 111b is the first request packet D111 received.
  • the time when the first request packet is first received is the same as that described above.
  • a plurality of second request packets D121 (D121a, D121b) are generated in the second packet generation unit 22, or a plurality of second request packets D121 generated outside the control packet transmission system 100 are stored in the second packet storage unit 23.
  • the second packet communication unit 21 transmits a plurality of first response packets D121a, D121b indicating a response to the first request packet D111 to the first packet communication unit 11 via at least one wireless communication path 3.
  • the requesting device 1 can receive the first response packet D121 more quickly. This makes it possible to improve throughput in the client-server system while ensuring the reliability of communication.
  • the second packet communication unit 21 receives a duplicate first request packet D111a after initially receiving the first request packet D111b at time T2, the second packet communication unit 21 discards the duplicate first request packet D111a without transmitting the first response packet D121a separately from the transmission of the first response packet D121a at time T3. In this case, the time required for the response device 2 to generate and transmit the response packet D12 can be reduced. This can further improve throughput.
  • subflow TCP113 receives the first response packet D121b.
  • subflow TCP112 receives the first response packet D121a.
  • control packet transmission system 100 After performing each of the above steps, the operation of the control packet transmission system 100 in this embodiment ends. Note that the control packet transmission system 100 may perform each of the above steps repeatedly, for example.
  • the control packet transmission system 100 can establish a unidirectional connection of multiple wireless communication paths 3 (3a, 3b, ...) based on the transmission and reception of the control packet D1 transmitted via one wireless communication path 3. For example, even when the first request packet D111 and the first response packet D121 are transmitted to each other via the wireless communication path 3b connecting the subflow TCP113 and the subflow TCP213, by including information of the subflow TCP112 and the subflow TCP212 (e.g., addresses A1 and B1) in each packet D111 and D121, a unidirectional connection can be established for the wireless communication path 3a in addition to the wireless communication path 3b.
  • the time required for data communication preparation to be complete indicates the time from the start of the first packet communication step S11 to the completion of the second packet communication step S12.
  • UL indicates the time required for the control packet D1 to be transmitted from the first packet communication unit 11 and for it to be received by the second packet communication unit 12
  • DL indicates the time required for the control packet D1 to be transmitted from the second packet communication unit 12 and for it to be received by the first packet communication unit 11.
  • the time required for data communication preparation to be completed in the present invention can be significantly reduced compared to the conventional method.
  • the present invention can use the wireless communication path 3 with the higher speed, thereby reducing the time required for data communication preparation to be completed compared to the conventional method.
  • the present invention can complete data communication preparation in the same time as the conventional method.
  • a first request packet D111b transmitted from the first packet communication unit 11 via the second communication path 3b may be lost before reaching the subflow TCP213 from the subflow TCP113.
  • the first request packet D111a becomes the first request packet D111 received. Since the first request packet D111a is received later than the first request packet D111b by the difference between time T4 and time T2, the time T3a at which the second packet communication unit 21 sends multiple first response packets D121a and D121b to the first packet communication unit 11 is later than time T3 by the difference between time T4 and time T2.
  • the time at which the second packet communication unit 21 first receives the first request packet D111 may be advanced. That is, the first request packet D111a is originally received with a delay of the difference between time T4 and time T2 from the first request packet D111b, but the delay can be limited to the difference between time T1 and time T1b.
  • the delay time can be limited to 1/3.
  • the communication speed of the first communication path 3a is 3/4 of that of the second communication path 3b
  • the difference between time T4 and time T2 is 1/4 x (T2 - T1)
  • the difference between time T1 and time T1b is 1/3 x (T2 - T1)
  • the delay time can be kept to 1/4.
  • the transmission of the first request packet D11 by the first packet communication unit 11 is less susceptible to the effects of fluctuations in communication quality between the wireless communication paths 3 (e.g., between the wireless communication paths 3a and 3b). This can improve the accuracy with which the requesting device 1 receives the first response packet D121 more quickly.
  • the first packet communication unit 11 may transmit at least two or more first request packets D111 (D111a, D111b, ...) sequentially in time series via one wireless communication path 3 (e.g., any one of the wireless communication paths 3a, 3b).
  • the transmission of the first request packet D11 by the first packet communication unit 11 is less susceptible to the influence of temporal fluctuations in the communication quality of the wireless communication path 3. This can improve the accuracy of allowing the requesting device 1 to receive the first response packet D11 earlier.
  • examples of temporal fluctuations in the communication quality of the wireless communication path 3 may include, for example, fading that occurs when the wireless communication of the control packet transmission system 100 is mobile communication.
  • the control packet transmission system 100 includes a requesting device 1 that transmits a plurality of first request packets D111 to a responding device 2 via at least one wireless communication path 3, and a responding device 2 that transmits a plurality of first response packets D121 to the requesting device 1 via at least one wireless communication path 3 when the first request packet D111 is received.
  • a requesting device 1 that transmits a plurality of first request packets D111 to a responding device 2 via at least one wireless communication path 3
  • a responding device 2 that transmits a plurality of first response packets D121 to the requesting device 1 via at least one wireless communication path 3 when the first request packet D111 is received.
  • the requesting device 1 transmits a plurality of first request packets D111 indicating a request for connection or disconnection to the responding device 2 via at least two or more wireless communication paths 3, and when the responding device 2 first receives the first request packet D111, it transmits a plurality of first response packets D121 to the requesting device 1 via at least one of the at least two or more wireless communication paths 3, and when the requesting device 1 first receives the first response packet D121, the at least two or more wireless communication paths 3 are connected or disconnected. Therefore, based on the transmission and reception of the control packet D1 transmitted via one wireless communication path 3, connections of the plurality of wireless communication paths 3 can be established. This makes it possible to further improve throughput in a client-server system while ensuring the reliability of communication.
  • the requesting device 1 transmits the first request packet D111 multiple times before receiving the first response packet D121 for the first time. Therefore, the transmission of the first request packet D111 by the requesting device 1 is less susceptible to influences caused by fluctuations in communication quality between the wireless communication paths 3. This can improve the accuracy with which the requesting device 1 receives the first response packet D121 sooner.
  • the control packet transmission method includes a first packet communication step S11 in which a plurality of first request packets D111 are transmitted to the response side device 2 via at least one or more wireless communication paths 3, and a second packet communication step S12 in which, when the response side device 2 first receives the first request packet D111, a plurality of first response packets D121 are transmitted to the request side device 1 via at least one or more wireless communication paths 3.
  • a first packet communication step S11 in which a plurality of first request packets D111 are transmitted to the response side device 2 via at least one or more wireless communication paths 3
  • a second packet communication step S12 in which, when the response side device 2 first receives the first request packet D111, a plurality of first response packets D121 are transmitted to the request side device 1 via at least one or more wireless communication paths 3.
  • the control packet transmission program causes the computer to execute a first packet communication step S11 of transmitting a plurality of first request packets D111 to the response side device 2 via at least one or more wireless communication paths 3, and a second packet communication step S12 of transmitting a plurality of first response packets D121 to the request side device 1 via at least one or more wireless communication paths 3 when the response side device 2 first receives the first request packet D111.
  • This allows the request side device 1 to receive the first response packet D121 more quickly. This makes it possible to provide a client-server system in which the reliability of communication is ensured while improving throughput.
  • FIG. 9 is a flowchart showing an example of the operation of the control packet transmission system 100 in this embodiment.
  • FIG. 10 is a sequence diagram showing an example of the detailed operation of each device 1, 2 constituting the control packet transmission system 100 in this embodiment.
  • FIG. 11 is a sequence diagram showing a first modified example of the detailed operation of each device 1, 2 constituting the control packet transmission system 100 in this embodiment.
  • FIG. 12 is a sequence diagram showing a second modified example of the detailed operation of each device 1, 2 constituting the control packet transmission system 100 in this embodiment.
  • This embodiment differs from the first embodiment in that the operation of the control packet transmission system 100 includes a third packet communication step 3. Note that a description of the same configuration as the above content will be omitted.
  • the operation of the control packet transmission system 100 further includes a third packet communication step S13 after the second packet communication step, as shown in FIG. 9, for example.
  • a first packet communication step S11 is performed.
  • the first packet communication unit 11 transmits at least two or more first request packets (D111a, D111b, ...) indicating a request for connection or disconnection from the requesting device 1 to the responding device 2, out of the control packet D1, to the responding device 2 via at least two or more wireless communication paths 3 (3a, 3b, ...) at time T1, as shown in, for example, FIG.
  • a second packet communication step S12 is performed.
  • the second packet communication unit 21 when the second packet communication unit 21 first receives a first request packet D111 transmitted from the first packet communication unit 11, the second packet communication unit 21 transmits, via at least one or more wireless communication paths 3, a plurality of second request packets D112 indicating a request for connection or disconnection to the requesting device 1, among the control packets D1, together with a first response packet D121, to the requesting device 1.
  • the first packet communication unit 11 discards the duplicate second request packet D112a without transmitting the first response packet D122a separately from the transmission of the second response packet D122a at time T6. This makes it possible to reduce the time required for the requesting device 1 to generate and transmit the response packet D12. This makes it possible to further improve throughput.
  • a third packet communication step S13 is performed.
  • the first packet communication unit 21 when the first packet communication unit 21 first receives the second request packet D112, the first packet communication unit 21 transmits a plurality of second response packets D122 indicating a response to the first received second request packet D112 to the response side device 2 via at least one wireless communication path 3.
  • the connection between the request side device 1 and the response side device 2 can be established or disconnected more quickly. This can further improve the throughput.
  • the first packet communication unit 21 transmits multiple second response packets D122a, D122b to the response device 2, for example, via multiple wireless communication paths 3a, 3b.
  • subflow TCP112 receives the first response packet D121 and the second request packet D112.
  • subflow TCP213 receives the first response packet D121b.
  • subflow TCP212 receives the second response packet D122a.
  • the control packet transmission system 100 can establish bidirectional connections of multiple wireless communication paths 3 (3a, 3b, ...) based on the transmission and reception of the control packet D1 transmitted via one wireless communication path 3.
  • the wireless communication path 3b connecting the subflow TCP113 and the subflow TCP213, by including information of the subflow TCP112 and the subflow TCP212 (e.g., addresses A1 and B1) in each packet D111 and D121, a bidirectional connection can be established for the wireless communication path 3a in addition to the wireless communication path 3b. This makes it possible to further improve the throughput in the client-server system while ensuring the reliability of communication.
  • the second request packet D112, and the second response packet D122 if all the control packets D1 are simultaneously transmitted via multiple wireless communication paths 3 (both 3a and 3b), if only one of the control packets D1 is transmitted via multiple wireless communication paths 3 (both 3a and 3b), if only one of the control packets D1 is transmitted via one wireless communication path 3 (either 3a or 3b), or if all the control packets D1 are transmitted via one wireless communication path 3 (each of 3a and 3b is selected at least once), in any case, a bidirectional connection can be established between the multiple wireless communication paths 3 (3a, 3b) used to transmit the control packet D1.
  • First packet communication step S11> 11 for example, the first response packet D121b and the second request packet D112b transmitted from the second packet communication unit 12 via the second communication path 3b may be lost before reaching the subflow TCP113 from the subflow TCP213. In this case, the first response packet D121a and the second request packet D112a become the first response packet D121 and the second request packet D111 received first.
  • the time T6a at which the first packet communication unit 11 sends the multiple second response packets D122a and D122b to the second packet communication unit 21 is later than time T6 by the difference between time T7 and time T5.
  • the time at which the first packet communication unit 11 first receives the second request packet D112 may be advanced. That is, the second request packet D112a is originally received with a delay of the difference between time T7 and time T5 from the second request packet D112b, but the delay can be limited to the difference between time T6 and time T6b.
  • the delay time can be limited to 1/3.
  • the delay time can be kept to 1/4.
  • the transmission of the second request packet D12 by the second packet communication unit 21 is less susceptible to the effects of fluctuations in the communication quality of the wireless communication path 3. This can improve the accuracy with which the responding device 2 receives the second response packet D122 more quickly.
  • the requesting device 1 transmits a plurality of first request packets D111 indicating a request for connection or disconnection to the responding device 2 via at least two or more wireless communication paths 3, and when the responding device 2 first receives the first request packet D111 indicating a request for connection or disconnection to the responding device 2, it transmits a plurality of first response packets D121 and a plurality of second request packets D112 indicating a request for connection or disconnection to the requesting device 1, together with the plurality of first response packets D121, to the requesting device 1 via at least one of the at least two or more wireless communication paths 3, and when the requesting device 1 first receives the second request packet D112, it transmits a plurality of second response packets D122 indicating a response to the first received second request packet D112 to the responding device 2 via at least one of the at least two or more wireless communication paths 3, and a connection or disconnection is established across the at least two or more wireless communication paths 3 when the responding device 2 first receives the second response packet D1
  • Fig. 13 is a schematic diagram showing an example of a detailed configuration of each device 1, 2 constituting the control packet transmission system 100 in this embodiment.
  • This embodiment differs from the first embodiment in that the first packet communication unit 11 and the second packet communication unit 21 in the control packet transmission system 100 further wirelessly communicate via a third wireless communication path 3c. Note that a description of the same configuration as that described above will be omitted.
  • the first packet communication unit 11 has a subflow TCP112, a subflow TCP113, and a subflow TCP114 in a main flow TCP110. Addresses A1, A2, and A3 are set in the subflows TCP112, 113, and 114. When any of the subflows TCP112, 113, and 114 receives a control packet, it is assumed that the first packet communication unit 11 has received the control packet.
  • the subflow TCP 114 is connected to, for example, a subflow TCP 214 of the second packet communication unit 21 of the responding device 2 (described later) via the third wireless communication path 3c.
  • the first packet communication unit 11 transmits a control packet from the subflow TCP 114 to the subflow TCP 214 via the third wireless communication path 3c.
  • the second packet communication unit 21 has a subflow TCP212, a subflow TCP213, and a subflow TCP214 in a main flow TCP211. Addresses B1, B2, and B3 are set in the subflows TCP212, 213, and 214. When any of the subflows TCP212, 213, and 214 receives a control packet, it is assumed that the second packet communication unit 21 has received the control packet.
  • the subflow TCP 214 is connected to, for example, the subflow TCP 114 of the first packet communication unit 111 of the requesting device 1 via the third wireless communication path 3c.
  • the second packet communication unit 21 transmits a control packet from the subflow TCP 214 to the subflow TCP 114 via the second wireless communication path 3c.
  • Fig. 14 is a sequence diagram showing an example of the detailed operation of each of the devices 1 and 2 constituting the control packet transmission system 100 in this embodiment.
  • Fig. 15 is a sequence diagram showing a modified example of the detailed operation of each of the devices 1 and 2 constituting the control packet transmission system 100 in this embodiment.
  • a plurality of first request packets D111 (D111a, D111b, D111c) are generated in the first packet generation unit 12, or a plurality of first request packets D111 generated outside the control packet transmission system 100 are stored in the first packet storage unit 13.
  • a first packet communication step S11 is performed.
  • the first packet communication unit 11 transmits at least three or more first request packets (D111a, D111b, D111c...) indicating requests from the requesting device 1 to the responding device 2 out of the control packet D1, via at least three or more wireless communication paths 3 (3a, 3b, 3c%), as shown in Fig. 14, for example, to the responding device 2.
  • the second packet communication unit 21 first receives the first request packet D111c from the first request packet D111 transmitted from the first packet communication unit 11. At this time, the control packet transmission system 100 transitions from the first packet communication step S11 to the second packet communication step S12.
  • a second packet communication step S12 is performed.
  • the third wireless communication path 3c goes out of communication range, and wireless communication via the third wireless communication path 3c becomes impossible.
  • the second packet communication unit 21 transmits a plurality of first response packets D121 (D111a, D111b%) indicating a response to the first request packet D111 to the requesting device 1 via at least two or more wireless communication paths 3 (3a, 3b%) excluding the third wireless communication path 3c.
  • the second packet communication unit 21 receives the first request packet D111b at time T4, and receives the first request packet D111a at time T5.
  • the time until the second packet communication step S12 is performed can be shortened by the difference between time T4 and time T2.
  • the third wireless communication path 3c is a standard for short-distance high-speed communication and, for example, the first wireless communication path 3a and the second wireless communication path 3b are compliant with different communication standards, when at least one of the devices 1 and 2 is performing mobile communication entering and leaving the communication range of the third wireless communication path 3c, even if the first control packet communication step S11 is completed via the third wireless communication path 3c and wireless communication via the third wireless communication path 3c becomes impossible before the second control packet communication step S12 is completed, the response from the second packet communication unit 21 to the first packet communication unit 11 can be completed.
  • part of the mobile communication of the control packet transmission system 100 can be performed via the third wireless communication path 3c, which is a communication standard that is effective in short distances. This makes it possible to more reliably improve throughput in a client-server system that performs mobile communication while ensuring communication reliability.
  • part of the wireless communication of the control packet transmission system 100 can be performed via the third wireless communication path 3c in an environment with unstable communication quality or in a temporary situation. This makes it possible to more reliably improve throughput in a client-server system while ensuring the reliability of communication.
  • a second packet communication step S12 is performed.
  • the third wireless communication path 3c moves from outside the communication range to within the communication range, and wireless communication via the third wireless communication path 3c becomes possible.
  • the second packet communication unit 21 transmits a plurality of first response packets D121 (D111a, D111b, D111c...) indicating responses to the first request packet D111 to the requesting device 1 via at least three or more wireless communication paths 3 (3a, 3b, 3c...) including the third wireless communication path 3c.
  • the first packet communication unit 11 receives the first response packet D121c at time T8. Then, the first packet communication unit 11 receives the first response packet D121b at time T6a. In this case, it can be said that by using the third wireless communication path 3c, the time until the second packet communication step S12 is completed can be shortened by the difference between time T6a and time T8.
  • the third wireless communication path 3c is a standard for short-distance high-speed communication and, for example, the first wireless communication path 3a and the second wireless communication path 3b are compliant with different communication standards
  • wireless communication via the third wireless communication path 3c becomes possible after the completion of the first control packet communication step S11, and even if wireless communication via the third wireless communication path 3c is newly performed from the second control packet communication step S12, the response from the second packet communication unit 21 to the first packet communication unit 11 can be completed.
  • part of the mobile communication of the control packet transmission system 100 can be performed via the third wireless communication path 3c, which is a communication standard that is effective in short distances. This makes it possible to more reliably improve throughput while ensuring communication reliability in a client-server system that performs mobile communication.
  • part of the wireless communication of the control packet transmission system 100 can be performed via the third wireless communication path 3c in an environment with unstable communication quality or in a temporary situation. This makes it possible to more reliably improve throughput in a client-server system while ensuring the reliability of communication.
  • the wireless communication path 3 used to transmit the first request packet D111 first received by the response device 2 and the wireless communication path 3 used to transmit the first response packet D121 first received by the requesting device 1 are wireless communications conforming to different communication standards. Therefore, a wireless communication path 3 that is temporarily valid can be selected between the time when the requesting device 1 transmits the first request packet D111 and the time when the requesting device 1 receives the response packet D121. This makes it possible to more reliably improve throughput while ensuring communication reliability, for example, in a client-server system that uses mobile communication.
  • Control packet transmission system 1 Request side device 10 Housing 101 CPU 102 ROM 103 RAM 104 Storage unit 105 I/F 106 I/F 107 Interface 108 Input unit 109 Display unit 110 Internal bus 11 First packet communication unit 111 Main flow TCP 112 Subflow TCP 113 Subflow TCP 114 Subflow TCP 12 First packet generating unit 13 First packet storage unit 2 Response side device 21 Second packet communication unit 121 Main flow TCP 122 Subflow TCP 123 Subflow TCP 124 Subflow TCP 22 Second packet generating unit 23 Second packet storage unit 3 Wireless communication paths A, B Address D1 Control packet D11 Request packet D111 First request packet D112 Second request packet D12 Response packet D121 First response packet D122 Second response packet S11 First packet communication step S12 Second packet communication step S13 Third packet communication step

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
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Abstract

[Problème] Fournir un système de transmission de paquet de commande, un procédé de transmission de paquet de commande, et un programme de transmission de paquet de commande capables d'améliorer le débit tout en garantissant la fiabilité des communications par un MP-TCP. [Solution] Un système de transmission de paquet de commande 100 transmet des paquets de commande, par l'intermédiaire d'une pluralité de trajets de communication sans fil 3, mutuellement entre un dispositif côté requête 1 et un dispositif côté réponse 2 qui constituent un système client-serveur qui communique sans fil au moyen d'un MP-TCP. L'invention concerne : un dispositif côté requête 1 qui transmet, à un dispositif côté réponse 2, par l'intermédiaire d'au moins un trajet de communication sans fil 3, une pluralité de premiers paquets de requête indiquant des requêtes au dispositif côté réponse 2 ; et le dispositif côté réponse 2 qui, lorsque les premiers paquets de requête transmis par le dispositif côté requête 1 sont d'abord reçus, transmet une pluralité de premiers paquets de réponse indiquant des réponses aux premiers paquets de requête par l'intermédiaire de l'au moins un trajet de communication sans fil 3 au dispositif côté requête 1.
PCT/JP2023/033055 2022-10-11 2023-09-11 Système de transmission de paquet de commande, procédé de transmission de paquet de commande, et programme de transmission de paquet de commande WO2024080050A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006228087A (ja) * 2005-02-21 2006-08-31 Sharp Corp マルチメディアデータ検索システム、マルチメディアデータ検索方法および携帯端末装置
JP2021525985A (ja) * 2018-05-31 2021-09-27 モボファイルズ インク． ディービーエー モボライズ 動的チャネルボンディングのシステム及び方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006228087A (ja) * 2005-02-21 2006-08-31 Sharp Corp マルチメディアデータ検索システム、マルチメディアデータ検索方法および携帯端末装置
JP2021525985A (ja) * 2018-05-31 2021-09-27 モボファイルズ インク． ディービーエー モボライズ 動的チャネルボンディングのシステム及び方法

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