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WO2025169349A1 - Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal - Google Patents

Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal

Info

Publication number
WO2025169349A1
WO2025169349A1 PCT/JP2024/004139 JP2024004139W WO2025169349A1 WO 2025169349 A1 WO2025169349 A1 WO 2025169349A1 JP 2024004139 W JP2024004139 W JP 2024004139W WO 2025169349 A1 WO2025169349 A1 WO 2025169349A1
Authority
WO
WIPO (PCT)
Prior art keywords
traffic flow
traffic
information
signal
transfer device
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2024/004139
Other languages
English (en)
Japanese (ja)
Inventor
健司 宮本
達也 島田
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
NTT Inc USA
Original Assignee
Nippon Telegraph and Telephone Corp
NTT Inc USA
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, NTT Inc USA filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2024/004139 priority Critical patent/WO2025169349A1/fr
Publication of WO2025169349A1 publication Critical patent/WO2025169349A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control

Definitions

  • the present invention relates to a signal transfer device, a relay device, a control device, and a signal processing method.
  • the signal forwarding system shown in Figure 15 is known as a configuration for exchanging signals between a base station and a wireless terminal.
  • Figure 15 is a diagram showing an example configuration of a conventional signal forwarding system 1000.
  • the signal forwarding system 1000 is a system that forwards signals from one communication device to another communication device in a mobile communication system.
  • the signal forwarding system 1000 includes, for example, a server 1, one or more transfer devices 2, a transfer device controller 3, and one or more base stations 4.
  • the server 1 communicates with wireless terminals 5 that are wirelessly connected to one or more base stations 4.
  • the transfer device 2 transfers signals sent and received between the server 1 and the wireless terminals 5.
  • the transfer device controller 3 controls each transfer device 2.
  • the base station 4 communicates wirelessly with the wireless terminals 5, transmits signals transferred from the transfer device 2 to the wireless terminals 5, and transfers signals received from the wireless terminals 5 to the transfer device 2.
  • 3GPP TS 38.300 V17.5.0 3GPP (registered trademark), 2023.
  • 3GPP TS 38.214 V17.6.0 3GPP, 2023.
  • Kazuto Shimizu et al. "5G SA-Based Voice Call Core Network Technology Overview," NTT DOCOMO Technical Journal, Vol. 30, No. 4, 2023.
  • 3GPP TS 23.501 V18.1.0 3GPP, 2023.
  • One aspect of the present invention is a signal processing method that acquires traffic information, which is information about the traffic flow from a wireless terminal to a higher-level device, for each traffic flow, determines a bandwidth control method for reducing frame jitter based on the traffic information acquired for each traffic flow, and performs adjustment processing to control the transmission of multiple frames that make up the upstream signal of the traffic flow based on the determined bandwidth control method.
  • traffic information which is information about the traffic flow from a wireless terminal to a higher-level device
  • the adjustment process is a process for controlling the transmission intervals of multiple frames.
  • the process for controlling the transmission intervals of multiple frames is a process, such as shaping, in which multiple frames with small frame intervals are buffered to widen the frame intervals and adjust the transmission intervals of multiple frames so that they are uniform.
  • the transfer device 20 performs the adjustment process for each traffic flow transmitted by the wireless terminal 50.
  • the transfer device controller 30 is a device that controls one or more transfer devices 20 by sending control signals. Furthermore, the transfer device controller 30 acquires traffic information for each traffic flow currently flowing through the transfer device 20. Note that the traffic flow in this invention refers to the upstream traffic flow transmitted from the wireless terminal 50. Based on the acquired traffic information for each traffic flow, the transfer device controller 30 determines a bandwidth control method that reduces frame jitter.
  • the bandwidth control method is, for example, a shaping rate.
  • the base station 40 is a device that communicates wirelessly with one or more wireless terminals 50. For example, the base station 40 transmits signals transferred from the transfer device 20 to the wireless terminals 50, and transfers signals received from the wireless terminals 50 to the transfer device 20.
  • the wireless terminal 50 has one or more traffic flows.
  • the wireless terminal 50 transmits a signal for each traffic flow.
  • the above program may be recorded on a computer-readable recording medium.
  • Examples of computer-readable recording media include portable media such as flexible disks, optical magnetic disks, ROMs, CD-ROMs, and semiconductor storage devices (e.g., SSDs: Solid State Drives), as well as storage devices such as hard disks and semiconductor storage devices built into computer systems.
  • the above program may also be transmitted via telecommunications lines.
  • the base station 40 may be, for example, a Wi-Fi (registered trademark) access point.
  • the signal transfer system 100 does not necessarily have to be applied to a mobile communication system, but may also be applied to a wireless communication system other than a mobile communication system.
  • the communication control unit 22 performs adjustment processing (e.g., shaping) for each traffic flow in accordance with the shaping instructions sent from the transfer device controller 30.
  • adjustment processing e.g., shaping
  • the following describes a method for calculating a shaping rate taking into account the priority of each traffic flow.
  • the transfer capacity of the server 10-side port of the transfer device 20 is 1 Gbps
  • two traffic flows e.g., a first traffic flow and a second traffic flow
  • the optimal shaping rate for each traffic flow is 600 Mbps.
  • the control decision unit 31 determines 600 Mbps as the shaping rate for the high-priority traffic flow (first traffic flow).
  • the control decision unit 31 determines 400 Mbps as the shaping rate, which is the value obtained by subtracting the shaping rate of the high-priority traffic flow (600 Mbps) from the transfer capacity of the server 10-side port of the transfer device 20. In this way, the control decision unit 31 prioritizes high-priority traffic flows, and therefore uses a shaping rate for low-priority traffic flows that is smaller than the calculated shaping rate.
  • control decision unit 31 determines the shaping rate based on the data volume and priority of each traffic flow currently flowing through the transfer device 20. In this way, in the signal transfer system 100, when there are multiple traffic flows, it is possible to suppress jitter in each traffic flow while ensuring the priority of the multiple flows.
  • the transfer device 20a may be installed between a central station and a distributed station, which are obtained by dividing the functions of the base station 40. If the central station and distributed station are, for example, the CU and DU in a mobile communications system, the transfer device 20a is installed in a section called an MMH. The central station and distributed station may be considered as a DU and RU, and the transfer device 20a may be installed in a section called an MFH. Furthermore, the application to wireless communications systems other than mobile communications systems may also be considered, such as by considering the central station as a Wi-Fi controller and the distributed station as a Wi-Fi access point.
  • Each transfer device 20a includes an information acquisition unit 21, a communication control unit 22, and a control decision unit 31. In this way, each transfer device 20a differs from the transfer device 20 in that it further includes the control decision unit 31.
  • the control decision unit 31 included in the transfer device 20a calculates a shaping rate based on the traffic information acquired by the information acquisition unit 21, taking into account the priority of each traffic flow, such that jitter is reduced within a range that satisfies the delay requirements for each traffic flow.
  • FIG. 6 is a flowchart showing the flow of processing performed by the signal transfer system 100a in the second embodiment.
  • the signal transfer system 100a repeats the processing shown in FIG. 6.
  • the signal transfer system 100a configured as described above can achieve the same effects as the first embodiment, even in a configuration in which the transfer device 20a performs all of the following: acquisition of traffic information, determination of the shaping rate, and adjustment processing.
  • a base station acquires traffic information and performs adjustment processing, and a radio controller that controls the base station determines a shaping rate.
  • FIG. 7 is a diagram showing an example configuration of a signal forwarding system 100b in the third embodiment.
  • the signal forwarding system 100b is a system that forwards signals from one communication device to another.
  • the signal forwarding system 100b includes, for example, a server 10, one or more transfer devices 20b, one or more base stations 40b, and a wireless controller 60.
  • the signal forwarding system 100b differs in configuration from the signal forwarding system 100 in that it does not include a transfer device controller 30, and includes a transfer device 20b and a base station 40b instead of the transfer device 20 and base station 40, and in that it newly includes a wireless controller 60.
  • the following will focus on the differences from the signal forwarding system 100.
  • Figure 7 explains the case where the signal forwarding system 100b includes two base stations 40b-1 and 40b-2.
  • the transfer device 20b is a device that transfers signals exchanged between a higher-level device (e.g., the server 10) and one or more wireless terminals 50. For example, the transfer device 20b transfers uplink signals sent from the wireless terminals 50 to the higher-level device.
  • a higher-level device e.g., the server 10
  • the transfer device 20b transfers uplink signals sent from the wireless terminals 50 to the higher-level device.
  • the wireless controller 60 is a device that controls one or more base stations 40b by transmitting control signals. Furthermore, the wireless controller 60 acquires traffic information for each traffic flow currently flowing through the transfer device 20b. Based on the acquired traffic information for each traffic flow, the wireless controller 60 determines, for each base station 40b, a bandwidth control method that reduces frame jitter.
  • the one or more base stations 40b and wireless controller 60 included in the signal transfer system 100b are configured using, for example, a processor such as a CPU, memory, and a communication interface.
  • the processor executes a program, causing the base station 40b and wireless controller 60 to function as communication devices equipped with different control units.
  • the control units provide the various functions that cause the communication device to function as a base station 40b or wireless controller 60.
  • the base station 40b may be, for example, a Wi-Fi (registered trademark) access point.
  • the signal transfer system 100b does not necessarily have to be applied to a mobile communication system, but may also be applied to a wireless communication system other than a mobile communication system.
  • the information acquisition unit 21 acquires traffic information for each traffic flow currently flowing through the transfer device 20b.
  • the information acquisition unit 21 notifies the wireless controller 60 of the acquired traffic information for each traffic flow.
  • FIG. 9 is a diagram showing an example configuration of a signal transfer system 100c in the fourth embodiment.
  • the signal transfer system 100c is a system that transfers signals from one communication device to another.
  • the signal transfer system 100c includes, for example, one or more transfer devices 20b, a base station 40c, and a wireless controller 60.
  • the base station 40c is configured from a central station 70 and one or more remote stations 80.
  • the central station 70 and one or more distributed stations 80 are a CU and one or more DUs in a mobile communications system.
  • the transfer device 20 is installed in a mobile midhaul section.
  • the central station 70 and one or more distributed stations 80 may also be a DU and one or more RUs in a mobile communications system.
  • the transfer device 20 is installed in a mobile fronthaul.
  • the remote station 80 receives a signal for each traffic flow (step S401).
  • the information acquisition unit 21 included in the remote station 80 acquires traffic information for each traffic flow currently flowing through the transfer device 20b based on the received signal (step S402).
  • the information acquisition unit 21 transmits the acquired traffic information for each traffic flow to the wireless controller 60.
  • the remote station 80 transfers the received signal to the transfer device 20 to which it is connected.
  • the control decision unit 31 included in the wireless controller 60 acquires traffic information for each traffic flow transmitted from the distributed station 80 (step S403).
  • the control decision unit 31 determines a shaping rate for each traffic flow using the acquired traffic information for each traffic flow (step S404).
  • the control decision unit 31 then generates a shaping instruction including information on the determined shaping rate for each traffic flow.
  • the control decision unit 31 transmits the generated shaping instruction to the distributed station 80 (step S405). Note that if the control decision unit 31 generates a shaping instruction based on traffic information obtained from the distributed station 80-1, it transmits the generated shaping instruction to the distributed station 80-1. If the control decision unit 31 generates a shaping instruction based on traffic information obtained from the distributed station 80-2, it transmits the generated shaping instruction to the distributed station 80-2.
  • the communication control unit 22 provided in the remote station 80 acquires the shaping instruction sent from the wireless controller 60. Based on the acquired shaping instruction, the communication control unit 22 performs an adjustment process on multiple frames in the traffic flow (step S406). As a result, the frame spacing of the multiple frames is adjusted to be uniform, resulting in a state where jitter is reduced. The multiple frames after the adjustment process are then transferred to the server 10.
  • the signal transfer system 100c configured as described above can achieve the same effects as the first embodiment even in a configuration in which the base stations 40c are distributed between the central station 70 and the remote stations 80.
  • a base station acquires traffic information, determines a shaping rate, and performs adjustment processing.
  • FIG. 11 is a diagram showing an example configuration of a signal transfer system 100d according to the fifth embodiment. This diagram shows an example configuration of a signal transfer system 100d according to the fifth embodiment.
  • the signal transfer system 100d is a system that transfers signals from one communication device to another communication device.
  • the signal transfer system 100d includes, for example, a server 10, one or more transfer devices 20b, and one or more base stations 40d.
  • Signal transfer system 100d differs in configuration from signal transfer system 100b in that it includes base station 40d instead of base station 40b. The following explanation will focus on the differences from signal transfer system 100b. Figure 11 explains the case where signal transfer system 100d includes two base stations 40d-1 and 40d-2.
  • the base station 40d may be, for example, a Wi-Fi access point.
  • the signal transfer system 100d does not necessarily have to be applied to a mobile communication system, but may also be applied to wireless communication systems other than mobile communication systems.
  • Each base station 40d includes an information acquisition unit 21, a communication control unit 22, and a control decision unit 31.
  • each base station 40d differs from base station 40b in that it further includes a control decision unit 31.
  • the control decision unit 31 included in base station 40d calculates a shaping rate for each traffic flow that reduces jitter within a range that satisfies the delay requirement, taking into account the priority of each traffic flow.
  • FIG. 12 is a flowchart showing the flow of processing performed by the signal transfer system 100d in the fifth embodiment.
  • the signal transfer system 100d repeats the processing shown in FIG. 12.
  • the communication control unit 22 performs adjustment processing on multiple frames in the traffic flow based on the shaping instruction output from the control decision unit 31 (step S504). As a result, the frame spacing of multiple frames is adjusted to be uniform, resulting in a state where jitter is reduced. The multiple frames after adjustment processing are then transferred to the server 10.
  • the signal transfer system 100d configured as described above can achieve the same effects as the first embodiment even in a configuration in which the base station 40d performs all of the traffic information acquisition, shaping rate determination, and adjustment processing.
  • FIG. 13 is a diagram showing an example configuration of a signal transfer system 100e according to the sixth embodiment.
  • This diagram shows an example configuration of a signal transfer system 100e according to the sixth embodiment.
  • the signal transfer system 100e is a system that transfers signals from one communication device to another communication device.
  • the signal transfer system 100e includes, for example, a server 10, one or more transfer devices 20b, and one or more base stations 40e.
  • the base station 40e is configured from a central station 70 and one or more remote stations 80e.
  • Signal transfer system 100e differs in configuration from signal transfer system 100c in that it includes base station 40e instead of base station 40c. The following explanation focuses on the differences from signal transfer system 100c. Figure 13 explains the case where signal transfer system 100e includes two remote stations 80e-1 and 80e-2.
  • the one or more distributed stations 80e included in the signal transfer system 100e are configured using, for example, a processor such as a CPU, memory, and a communication interface.
  • the processor executes a program, causing the one or more distributed stations 80e to function as a communication device equipped with different control units.
  • the control units provide various functions that enable the communication device to function as one or more distributed stations 80e.
  • the central station 70 and one or more distributed stations 80e are a CU and one or more DUs in a mobile communications system.
  • the transfer device 20b is installed in the mobile midhaul section.
  • the central station 70 and one or more distributed stations 80e may also be a DU and one or more RUs in a mobile communications system.
  • the transfer device 20b is installed in the mobile fronthaul.
  • the central station 70 may be a Wi-Fi controller, and one or more remote stations 80e may be Wi-Fi access points.
  • the signal transfer system 100e does not necessarily have to be applied to a mobile communication system, and may also be applied to wireless communication systems other than mobile communication systems.
  • the information acquisition unit 21, communication control unit 22, and control decision unit 31 are provided in the control unit of the remote station 80e.
  • FIG. 14 is a flowchart showing the flow of processing performed by the signal transfer system 100e in the sixth embodiment.
  • the signal transfer system 100e repeats the processing shown in FIG. 14.
  • the distributed station 80e receives a signal for each traffic flow (step S601).
  • the information acquisition unit 21 included in the distributed station 80e acquires traffic information for each traffic flow currently flowing through the transfer device 20b based on the received signal (step S602).
  • the information acquisition unit 21 outputs the acquired traffic information for each traffic flow to the control decision unit 31.
  • the distributed station 80e transfers the received signal to the transfer device 20b to which it is connected.
  • the communication control unit 22 performs adjustment processing on multiple frames in the traffic flow based on the shaping instruction output from the control decision unit 31 (step S604). As a result, the frame spacing of multiple frames is adjusted to be uniform, resulting in a state where jitter is reduced. The multiple frames after adjustment processing are then transferred to the server 10.

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

Abstract

Un dispositif de relais selon la présente invention comprend : une unité d'acquisition d'informations qui, pour chaque flux de trafic d'un terminal sans fil à un dispositif de niveau supérieur, acquiert des informations de trafic qui sont des informations concernant le flux de trafic; et une unité de commande de communication qui, sur la base d'un procédé de commande de bande pour réduire la gigue de trames déterminées sur la base des informations de trafic acquises par l'unité d'acquisition d'informations pour chaque flux de trafic, exécute un traitement de réglage qui commande la transmission d'une pluralité de trames qui constituent un signal de liaison montante pour le flux de trafic.　
PCT/JP2024/004139 2024-02-07 2024-02-07 Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal Pending WO2025169349A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/004139 WO2025169349A1 (fr) 2024-02-07 2024-02-07 Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/004139 WO2025169349A1 (fr) 2024-02-07 2024-02-07 Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal

Publications (1)

Publication Number Publication Date
WO2025169349A1 true WO2025169349A1 (fr) 2025-08-14

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PCT/JP2024/004139 Pending WO2025169349A1 (fr) 2024-02-07 2024-02-07 Dispositif de transfert de signal, dispositif de relais, dispositif de commande et procédé de traitement de signal

Country Status (1)

Country Link
WO (1) WO2025169349A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017221481A1 (fr) * 2016-06-20 2017-12-28 日本電気株式会社 Appareil de réseau de communication, système de réseau de communication et procédé d'un appareil de réseau de communication
WO2023013089A1 (fr) * 2021-08-05 2023-02-09 日本電信電話株式会社 Système de communication et procédé de commande de communication

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017221481A1 (fr) * 2016-06-20 2017-12-28 日本電気株式会社 Appareil de réseau de communication, système de réseau de communication et procédé d'un appareil de réseau de communication
WO2023013089A1 (fr) * 2021-08-05 2023-02-09 日本電信電話株式会社 Système de communication et procédé de commande de communication

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