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WO2024241413A1 - Système de commande de communication - Google Patents

Système de commande de communication Download PDF

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Publication number
WO2024241413A1
WO2024241413A1 PCT/JP2023/018884 JP2023018884W WO2024241413A1 WO 2024241413 A1 WO2024241413 A1 WO 2024241413A1 JP 2023018884 W JP2023018884 W JP 2023018884W WO 2024241413 A1 WO2024241413 A1 WO 2024241413A1
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WO
WIPO (PCT)
Prior art keywords
unit
buffer unit
flow
buffer
unregistered
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Pending
Application number
PCT/JP2023/018884
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English (en)
Japanese (ja)
Inventor
裕希 坂上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
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Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2023/018884 priority Critical patent/WO2024241413A1/fr
Publication of WO2024241413A1 publication Critical patent/WO2024241413A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements

Definitions

  • This disclosure relates to a communication control system that controls communication for each application.
  • the end-to-end network can be divided into wireless and wired sections.
  • EDCA Enhanced Distributed Channel Access
  • IEEE802.11 a priority control function called Enhanced Distributed Channel Access (EDCA) of IEEE802.11 as an existing technology (see, for example, Non-Patent Documents 1 and 2).
  • EDCA provides control on a per-terminal (destination) basis, and cannot provide multiple communication services with different network requirements to the same terminal. For this reason, it is difficult to control quality on an application-by-application basis with EDCA. Therefore, a system has been proposed that provides per-application flow buffers and performs scheduling for each per-flow buffer, making it possible to achieve quality control on an application-by-application basis (see, for example, non-patent document 3).
  • IEEE802.11e A wireless LAN standard that realizes QoS
  • Non-Patent Document 3 quality control can be performed on an application-by-application basis for applications for which per-flow buffers are defined.
  • traffic occurs for an application for which no per-flow buffers are defined, such as a new application, there is a possibility that packets will be discarded without being stored in any per-flow buffer. Even if packets are not discarded, they will be transmitted ignoring scheduling, which may cause delays, jitter, and packet loss in packet transmissions from other terminals, etc.
  • this disclosure aims to make it possible to achieve quality control even when traffic other than that of the predetermined application is present.
  • the communication device disclosed herein includes a per-flow buffer unit that accumulates transmission data for a predetermined application, an unregistered buffer unit that accumulates transmission data for applications other than the predetermined application, and a scheduler unit that controls transmissions from the per-flow buffer unit and the unregistered buffer unit.
  • a communication control method is a method executed by a communication device according to the present disclosure, A procedure in which a per-flow buffer unit stores transmission data of a predetermined application; an unregistered buffer unit storing transmission data other than that of the predetermined application; a procedure in which a scheduler unit controls transmission of the per-flow buffer unit and the unregistered buffer unit; Equipped with.
  • transmission data other than that of the predetermined application is stored in the unregistered buffer section, and transmission control is performed on the unregistered buffer section in the same manner as on the per-flow buffer section.
  • the communication device of the present disclosure may include a database unit that links a flag in the transmission data to the flow unit buffer unit, and a distribution unit that distributes the transmission data to the flow unit buffer unit linked in the database unit based on the flag in the transmission data.
  • the distribution unit distributes the transmission data having a flag that is not specified in the database unit to the unregistered buffer unit.
  • the allocation unit may inquire of an external party as to whether or not to add the flow unit buffer unit, and when a response to the effect that the flow unit buffer unit should be added is received from the external party, the allocation unit may add the flow unit buffer unit having the identifier obtained in the response, and link the added flow unit buffer unit and the flag not defined in the database unit in the database unit.
  • the communication control system of the present disclosure includes the communication device of the present disclosure and a control device that performs transmission control of the per-flow buffer unit and the unregistered buffer unit of the communication device.
  • the scheduler unit of the communication device performs transmission control of the per-flow buffer unit and the unregistered buffer unit according to instructions from the control device.
  • the communication device may be a terminal device that executes an application.
  • the unregistered buffer unit may store uplink data transmitted by a new application.
  • the communication device may be a relay device that relays between a terminal device that executes an application and a communication partner of the terminal device.
  • the unregistered buffer unit may store downstream data received by a new application in the terminal device.
  • quality control on an application-by-application basis can be achieved even when traffic other than that of a predetermined application exists.
  • 1 illustrates an example configuration of a communication control system according to the present disclosure.
  • 1 shows an example of application of a communication device according to the present disclosure to a terminal.
  • 1 illustrates an example of application of a communication device according to the present disclosure to an access point.
  • 1 illustrates an example embodiment of a control device.
  • 4 shows an example of a buffer management database provided in a database unit of the control device.
  • 1 shows an example of a packet transmission flow in a terminal.
  • 1 illustrates an example of a packet transmission flow at an access point.
  • 1 shows an example of a scheduling flow in a control device.
  • 1 shows an example of application of a communication device according to the present disclosure to a terminal.
  • 1 shows an example of a database unit in a terminal. 13 shows an example of the operation of a distribution unit in the terminal.
  • 1 illustrates an example of application of a communication device according to the present disclosure to an access point.
  • 1 shows an example of application of a communication device according to the present disclosure to a terminal.
  • 4 shows an example of a flag management database provided in a database unit of the control device. 13 shows an example of a de-registration procedure in a terminal and a control device. 4 shows an example of a buffer management database provided in a database unit of the control device.
  • 1 shows an example of a database unit in a terminal. 1 illustrates an example of application of a communication device according to the present disclosure to an access point.
  • (First embodiment) 1 shows an example of a system configuration according to the present disclosure.
  • the communication control system according to the present disclosure is a system that executes communication control of communication devices connected to the same network infrastructure.
  • the network infrastructure is a wireless network 50
  • the communication devices connected to the wireless network 50 are a plurality of terminals 10 and an access point 20.
  • the terminal 10 is a terminal device that executes an application.
  • the access point 20 is a relay device that relays between the terminal 10 and the communication partner of the terminal 10.
  • the access point 20 is connected to the public network via the upper network device 40. This allows multiple terminals 10 to communicate with communication partners such as servers according to their respective applications.
  • the following embodiment shows an example in which the communication control system controls communication for both the terminal 10 and the access point 20. That is, in a wireless network 50 in which multiple terminals 10 are connected to the access point 20, the control device 30 performs quality control for both the multiple terminals 10 and the access point 20.
  • FIG. 2 shows an example of the configuration of the terminal 10 of this embodiment.
  • the terminal 10 has a configuration for performing communication for each application.
  • a configuration for performing communication for each application an example is shown in which a per-flow buffer unit 13 is provided for each application 14, and a main signal buffer unit 12 is used to manage the order of transmission and reception in the main signal transmission and reception unit 11. For this reason, the terminal 10 uses different applications 14 for each communication service and network requirements used.
  • the terminal 10 has a configuration for executing control from the control device 30.
  • an example is shown that includes a packet amount notification unit 16 that notifies the amount of packets in the per-flow buffer unit 13, a control signal transmission/reception unit 17 that communicates with the control device 30, and a scheduler unit 15 that schedules packets stored in the per-flow buffer unit 13.
  • FIG. 3 shows an example of the configuration of the access point 20.
  • the access point 20 has a configuration for performing communication for each application.
  • the configuration for performing communication for each application includes a flow-based buffer unit 23 that accumulates packets received by the upper-side main signal transceiver unit 24 for each application 14, and an example is shown in which a main signal buffer unit 22 is used to manage the order of transmission and reception in the lower-side main signal transceiver unit 21.
  • the access point 20 is provided with a configuration for control from the control device 30.
  • a configuration for control from the control device 30 includes a packet amount notification unit 26 that notifies the amount of packets in the per-flow buffer unit 23, a control signal transmission/reception unit 27 that communicates with the control device 30, and a scheduler unit 25 that schedules the packets stored in the per-flow buffer unit 23.
  • FIG. 4 shows an example of the configuration of the control device 30.
  • the control device 30 receives the amount of packets transmitted from the control signal transmission/reception units 17 and 27 using the control signal transmission/reception unit 31, and manages the amount of packets in the per-flow buffer units 13 and 23 in the terminal 10 and the access point 20 using a buffer management database provided in the database unit 33.
  • the scheduling unit 32 then schedules the packet transmission of the terminal 10 and the access point 20 based on the buffer management database.
  • FIG. 5 shows an example of the buffer management database.
  • the buffer management database manages the amount of packets for each per-flow buffer unit 13 and 23 provided in the terminal 10 and the access point 20.
  • the per-flow buffer units 13 and 23 are identified using the node number, which is the identifier of the terminal 10 and the access point 20, and the buffer number, which is the identifier of the per-flow buffer units 13 and 23.
  • the terminal 10 and the access point 20 are provided with unregistered buffer units 52 and 62 so that the per-flow buffer units 13 and 23 can be expanded.
  • These unregistered buffer units 52 and 62 have unique buffer numbers. This buffer number is arbitrary, but in this embodiment it is described as "unregistered” for ease of understanding.
  • the terminal 10 uses the unregistered buffer unit 52 instead of the flow unit buffer unit 13 to be used by the new application 51.
  • the terminal 10 of the present embodiment executes the communication control method of the present disclosure.
  • This configuration in the terminal 10 may be provided in all of the multiple terminals 10, but it is sufficient that at least one of the multiple terminals 10 has the configuration.
  • terminal 10#N has the configuration
  • the packet is output to the unregistered buffer unit 62.
  • the access point 20 of the present embodiment executes the communication control method of the present disclosure.
  • FIG. 6 shows an example of a packet transmission flow in the terminal 10.
  • an application 14 transmits a packet (S111)
  • the packet is stored in the per-flow buffer unit 13 defined for each application 14.
  • a new application 51 for which no per-flow buffer unit 13 is defined transmits a packet in step S111
  • the packet is allocated to the unregistered buffer unit 52 in step S112.
  • the packet amount notification unit 16 notifies the control device 30 of the amount of packets stored in the flow-unit buffer unit 13 and the unregistered buffer unit 52 (S113).
  • the terminal 10 then receives the packet transmission time and transmission duration from the control device 30 (S114).
  • the scheduler unit 15 of the terminal 10 moves the packets stored in the flow-unit buffer unit 13 and the unregistered buffer unit 52 to the main signal buffer unit 12 according to the packet transmission time and transmission duration notified by the control device 30, and transmits them from the main signal transmission/reception unit 11 (S115).
  • Figure 7 shows an example of a packet transmission flow in the access point 20.
  • the upper side main signal transmitting/receiving unit 24 receives a packet (S121), it distributes the packet to the per-flow buffer units 23#1 to #K (S122). At this time, if there is a packet that cannot be distributed to the per-flow buffer units 23#1 to #K, it is distributed to the unregistered buffer unit 62.
  • the packet amount notifying unit 26 notifies the control device 30 of the packet amount stored in the per-flow buffer units 23#1 to #K and the unregistered buffer unit 62 (S123).
  • the scheduler unit 25 When the scheduler unit 25 receives the packet transmission time and transmission duration from the control device 30 (S124), it moves the packet stored in the per-flow buffer unit 23 and the unregistered buffer unit 62 to the main signal buffer unit 22 according to the packet transmission time and transmission duration notified from the control device 30, and transmits it from the lower side main signal transmitting/receiving unit 21 (S125).
  • Figure 8 shows an example of a scheduling flow in the control device 30.
  • the received packet amount is stored in the buffer management database (S132).
  • the buffer numbers of the unregistered buffer units 52 and 62 are entered as "unregistered" based on the buffer management database.
  • the scheduling unit 32 determines the transmission time and transmission duration for the terminal 10 and the access point 20 for each buffer number based on the buffer management database (S133). Then, the control signal transmitting/receiving unit 31 notifies the terminal 10 and the access point 20 of the packet transmission time and transmission duration for each buffer number determined by the scheduling unit 32 (S134).
  • the terminal 10 and the access point 20 are provided with the unregistered buffer units 52 and 62, and the control device 30 also performs scheduling on packets stored in the unregistered buffer units 52 and 62. Therefore, in this embodiment, packet transmission control can be performed even if an application that is not registered in the database unit 33 of the control device 30 exists.
  • the application 14 of this embodiment sets a flag for each application and stores it in the packet.
  • the flag can be any information that can identify the application. For example, the ToS value in the IP header, the CoS value in the Ethernet frame, the source IP address, the source port number, the destination IP address, the destination port number, the protocol number, or a combination of these can be set as the flag.
  • FIG. 9 shows an example of the configuration of the terminal 10 of this embodiment.
  • the terminal 10 of this embodiment includes a database unit 53 and a distribution unit 54.
  • the distribution unit 54 performs distribution according to the settings of the database unit 53.
  • FIG. 10 shows an example of the database unit 53 in the terminal 10.
  • the database unit 53 holds allocation settings for the per-flow buffer unit 13 in response to flags. For example, the database unit 53 sets the node number of the terminal 10 and the buffer number of the per-flow buffer unit 13 for each flag.
  • FIG. 11 shows an example of the operation of the distribution unit 54.
  • the distribution unit 54 receives a packet (S211), it reads the flag in the packet (S212) and checks in the database unit 53 whether there is a per-flow buffer unit 13 linked to the flag (S213).
  • the distribution unit 54 distributes the packet to the per-flow buffer unit 13 returned from the database unit 53 (S214).
  • the distribution unit 54 distributes the packet to the unregistered buffer unit 52 (S215).
  • the subsequent steps are the same as steps S113 to S115 in the first embodiment.
  • FIG. 12 shows an example of the configuration of the access point 20 of this embodiment.
  • the access point 20 includes a database unit 63 and a distribution unit 64.
  • the distribution unit 64 performs distribution according to the settings of the database unit 63.
  • the database unit 63 is similar to the database unit 53 in the terminal 10, and holds allocation settings for the per-flow buffer unit 23 in response to flags. For example, the database unit 63 sets the node number of the access point 20 and the buffer number of the per-flow buffer unit 23 for each flag.
  • the packet transmission flow in the access point 20 is the same as the packet transmission flow in the terminal 10, and the configuration of the terminal 10 in the procedure shown in FIG. 11 can be read as the configuration of the access point 20.
  • the communication control system of this embodiment checks the flag stored in the packet and either distributes it to the per-flow buffer unit 13 or 23, or distributes it as unregistered to the unregistered buffer unit 52 or 62. This allows for flexible distribution by changing the settings of the database units 53 and 63, and makes it possible to reduce the number of unregistered buffer units 52 and 62.
  • Third Embodiment 13 shows an example of the configuration of the terminal 10 of this embodiment.
  • the application 14 sets a flag for each application and stores it in a packet.
  • the terminal 10 of this embodiment includes a database unit 53 and a distribution unit 54, as in the second embodiment.
  • the allocation unit 54 queries the external control device 30 as to whether or not to add a flow unit buffer unit 13. Then, when the allocation unit 54 receives a response from the control device 30 to the effect that a flow unit buffer unit 13 should be added, it adds a flow unit buffer unit 13 having the buffer number obtained in the response, and links the buffer number of the added flow unit buffer unit 13 to the new flag in the database unit 53.
  • the database 33 of the control device 30 includes a flag management database that manages a list of flags that can be used within the system. As shown in FIG. 14, the flag management database manages the location of the flag in the packet information and the flag value written in that location. For example, if the flag is a ToS value in the IP header, the location of the flag is the ToS field in the IP header, and the flag value is the value written in the ToS field.
  • any information about the packet may be included instead of or in addition to the location of the flag in the packet information. In this embodiment, this information is used to determine whether or not to add a per-flow buffer unit 13.
  • step S213 in the second embodiment when the flag in the packet is not registered in the database unit 53 (No in step S213), an unregistered procedure is executed. For example, when new applications 51#1 and 51#2 transmit packets, values corresponding to the flags contained in these packets are not registered in the database unit 53. When transmitting these packets, the communication control system of this embodiment executes the following process.
  • FIG. 15 shows an example of an unregistered procedure in the terminal 10 and the control device 30.
  • the distribution unit 54 transmits information about a packet that includes a flag that is not registered in the database unit 53 to the control device 30 (S311).
  • the control device 30 checks whether the information of the received packet matches the information registered in the flag management database of the database unit 33 (S321). If the information is registered in the flag management database (Yes in step S321), the control device 30 determines to add a per-flow buffer unit 13 (S322).
  • step S322 the control device 30 determines the flag and the buffer number of the flow unit buffer unit 13 linked thereto. For example, it determines that a flow unit buffer unit 13 with buffer number O is to be added to flag Fo in terminal 10#N. As a result, buffer number O of terminal 10#N is registered in the buffer management database of database unit 33 shown in FIG. 16. The control device 30 notifies the terminal 10 of the flag and the buffer number of the flow unit buffer unit 13 linked thereto (S323).
  • the distribution unit 54 of the terminal 10 When the distribution unit 54 of the terminal 10 receives the flag and the information on the flow unit buffer unit 13, as shown in FIG. 17, it registers the flag Fo and the buffer number O of the newly created flow unit buffer unit 13 in the database unit 53 (S312). Accordingly, the terminal 10 adds a flow unit buffer unit 13 with buffer number O (S312).
  • the allocation unit 54 allocates the packet with flag Fo, which has been inquired of by the control device 30, to the per-flow buffer unit 13 with buffer number O (S112). For example, when flag Fo is stored in a packet from new application 51#2, the allocation unit 54 allocates it to the per-flow buffer unit 13.
  • the subsequent steps are the same as steps S113 to S115 in the first embodiment.
  • the control device 30 If the control device 30 does not have a corresponding flag registered in the flag management database (No in step S321), the control device 30 notifies the terminal 10 that the corresponding flag does not exist (S324).
  • the distribution unit 54 of the terminal 10 distributes the packet to the unregistered buffer unit 52 (S112), similar to step S215 in the second embodiment. For example, the distribution unit 54 distributes packets from the new application 51#2 to the unregistered buffer unit 52.
  • the subsequent steps are similar to steps S113 to S115 in the first embodiment.
  • the sorting unit 54 may not need to check with the control device 30. In addition, the sorting unit 54 may record information about the packet for which the corresponding flag does not exist in the database unit 53.
  • confirmation may be made with the control device 30 for each one, and multiple flow unit buffer units 13 may be newly created.
  • FIG. 18 shows an example of the configuration of the access point 20 of this embodiment.
  • the access point 20 includes a database unit 63 and a distribution unit 64.
  • the distribution unit 64 registers flag information in the database unit 63 based on information from the control device 30, and creates a new per-flow buffer unit 23.
  • the operation of the distribution unit 64 in the access point 20 is similar to the operation of the distribution unit 54 in the terminal 10, and the configuration of the terminal 10 in the non-registration procedure shown in FIG. 15 can be read as the configuration of the access point 20.
  • the communication control system of this embodiment can add a per-flow buffer 13 to each terminal 10 by registering the flags of the applications 14 expected to be executed in each terminal 10 in the flag management database of the database unit 33. Therefore, by adopting this embodiment, it becomes possible to automatically perform quality control for new applications 14 added to the terminal 10. In addition, the number of unregistered buffers in each terminal 10 can be kept to a necessary minimum.
  • the communication control system of the present disclosure may have the following configuration. (1) Each terminal 10 and the access point 20 has unregistered buffer units 52 and 62 for storing transmission packets from new applications and the like that cannot be allocated to the per-flow buffer units. (2) When a transmission packet is generated from a new application or the like, each terminal 10 and the access point 20 stores the transmission packet in the unregistered buffer units 52 and 62 . (3) Each terminal 10 notifies the control device 30 of the amount of packets stored in the unregistered buffer unit 52 and the per-flow buffer unit 13 . (4) The access point 20 notifies the control device 30 of the amount of packets stored in the unregistered buffer unit 62 and the per-flow buffer unit 23 .
  • the control device 30 records the amount of packets stored in the unregistered buffer units 52 and 62 and the per-flow buffer units 13 and 23 in the database unit 33 . (6) The control device 30 performs scheduling based on the records in the database unit 33. (7) The control device 30 notifies each terminal 10 and the access point 20 of the scheduling result as a control signal. (8) Each terminal 10 transmits the packets stored in the unregistered buffer unit 52 and the per-flow buffer unit 13 in accordance with the received scheduling. (9) The access point 20 transmits the packets stored in the unregistered buffer unit 62 and the per-flow buffer unit 23 in accordance with the received scheduling.
  • the terminal 10, access point 20, and control device 30 disclosed herein can also be realized by a computer and a program, and the program can be recorded on a recording medium or provided via a network.
  • This disclosure has shown an example in which both the multiple terminals 10 and the access point 20 have an unregistered buffer unit, but the communication control system of this disclosure may be configured so that either the terminal 10 or the access point 20 has an unregistered buffer unit.
  • the wireless network 50 can be any communication network available to the terminal 10.
  • the access point 20 can be any relay device according to the communication network used by the terminal 10.
  • the terminal 10 can be any terminal device that can use a communication network.
  • Terminal 11 Main signal transmitting/receiving unit 12, 22: Main signal buffer unit 13, 23: Flow unit buffer unit 14: Application 15, 25: Scheduler unit 16, 26: Packet amount notification unit 17, 27: Control signal transmitting/receiving unit 20: Access point 21: Lower side main signal transmitting/receiving unit 24: Upper side main signal transmitting/receiving unit 30: Control device 31: Control signal transmitting/receiving unit 32: Scheduling unit 33: Database unit 40: Upper network 50: Wireless network 51: New application 52, 62: Unregistered buffer unit 53: Database unit 54: Distribution unit

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente divulgation concerne un dispositif de communication comprenant : une unité tampon d'unité de flux qui stocke des données de transmission pour une application prédéterminée ; une unité tampon non enregistrée qui stocke des données de transmission qui ne sont pas pour l'application prédéterminée ; et une unité de planification qui effectue une commande de transmission pour l'unité tampon d'unité de flux et l'unité tampon non enregistrée.
PCT/JP2023/018884 2023-05-22 2023-05-22 Système de commande de communication Pending WO2024241413A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100027473A (ko) * 2008-09-02 2010-03-11 삼성전자주식회사 큐오에스를 제공하기 위한 단말의 데이터 전송 장치 및 방법
WO2021192323A1 (fr) * 2020-03-24 2021-09-30 日本電信電話株式会社 Système, procédé et dispositif de commande et programme

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100027473A (ko) * 2008-09-02 2010-03-11 삼성전자주식회사 큐오에스를 제공하기 위한 단말의 데이터 전송 장치 및 방법
WO2021192323A1 (fr) * 2020-03-24 2021-09-30 日本電信電話株式会社 Système, procédé et dispositif de commande et programme

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