WO2022059162A1 - Système de communication sans fil, procédé de communication sans fil, et dispositif de point d'accès - Google Patents

Système de communication sans fil, procédé de communication sans fil, et dispositif de point d'accès Download PDF

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Publication number
WO2022059162A1
WO2022059162A1 PCT/JP2020/035424 JP2020035424W WO2022059162A1 WO 2022059162 A1 WO2022059162 A1 WO 2022059162A1 JP 2020035424 W JP2020035424 W JP 2020035424W WO 2022059162 A1 WO2022059162 A1 WO 2022059162A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
access point
arrival
uplink packet
wireless communication
Prior art date
Application number
PCT/JP2020/035424
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English (en)
Japanese (ja)
Inventor
亮太 椎名
稔久 藤原
真也 玉置
友宏 谷口
一貴 原
Original Assignee
日本電信電話株式会社
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.)
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Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2022550285A priority Critical patent/JPWO2022059162A1/ja
Priority to PCT/JP2020/035424 priority patent/WO2022059162A1/fr
Publication of WO2022059162A1 publication Critical patent/WO2022059162A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present disclosure relates to a wireless communication system using an access point device.
  • Wi-Fi registered trademark
  • the number of surveillance cameras and environment sensors that use wireless connections is increasing.
  • a wireless connection particularly wireless LAN
  • surveillance cameras, environment sensors, etc. are more susceptible to the high communication quality and the certainty of information provision (see, for example, Non-Patent Document 1).
  • the number of connected terminals is the number of surveillance cameras and environment sensors. It is easily affected by the high communication quality and the certainty of information provision due to the sudden increase in the number of cameras.
  • Non-Patent Documents 2 and 3 can be applied so that the surveillance camera, the environment sensor, etc. are not easily affected by the high communication quality and the certainty of information provision.
  • Non-Patent Document 2 discloses a QoS control method 802.11e that executes queue control of the MAC layer and preferentially sends out a specific packet as a priority control technique for a specific packet.
  • Non-Patent Document 3 discloses a quality prediction technique as a technique for stabilizing communication quality, which predicts the communication quality of a plurality of radio sections and predictively switches a plurality of radio resources.
  • Non-Patent Document 2 both the access point device and the terminal device need to support the priority control standard in order for the priority control technology for a specific packet to be effective. If even one terminal device does not support the priority control standard, the overall optimization of priority control will be disturbed, and unintended packet collision will occur. In particular, as the number of uplink packets from surveillance cameras and environment sensors increases, unintended packet collisions occur with downlink packets to user terminals such as smartphones, and the bandwidth is used in the entire wireless communication system. Efficiency will decrease. Further, Non-Patent Document 3 discloses a technology for stabilizing communication quality, but does not disclose a technology for preferential control in units of a specific business operator or service.
  • the present disclosure discloses that in a wireless communication system using an access point device, even if any of the terminal devices does not support the priority control standard, the packet is uploaded from the surveillance camera, the environment sensor, or the like. It is an object of the present invention to improve the band utilization efficiency of the entire wireless communication system by preventing an unintended packet collision with a downlink packet to a user terminal such as a smartphone regardless of the increase in packets.
  • the access point device predicts the future arrival timing of the uplink packet from the surveillance camera, the environment sensor, or the like based on the periodic arrival timing of the uplink packet from the surveillance camera, the environment sensor, or the like. Further, the access point device controls the transmission timing of the downlink packet to the user terminal such as a smartphone so as to avoid the future arrival timing of the uplink packet from the surveillance camera, the environment sensor, or the like.
  • the present disclosure includes an access point device, a terminal device that periodically transmits an uplink packet to the access point device, and another terminal device that receives a downlink packet from the access point device.
  • the access point device is a terminal based on an arrival monitoring unit that monitors the arrival timing of an uplink packet from the terminal device and a periodic arrival timing of an uplink packet from the terminal device.
  • the arrival prediction unit that predicts the future arrival timing of the uplink packet from the device and the transmission timing of the downlink packet to the other terminal device are controlled so as to avoid the future arrival timing of the uplink packet from the terminal device. It is a wireless communication system including a transmission control unit.
  • the present disclosure comprises a wireless communication system including an access point device, a terminal device for periodically transmitting an uplink packet to the access point device, and another terminal device for receiving a downlink packet from the access point device.
  • the access point device is based on an arrival monitoring step for monitoring the arrival timing of an uplink packet from the terminal device and a periodic arrival timing of an uplink packet from the terminal device.
  • the arrival prediction step for predicting the future arrival timing of the uplink packet from the terminal device and the transmission timing of the downlink packet to the other terminal device so as to avoid the future arrival timing of the uplink packet from the terminal device. It is a wireless communication method characterized by executing the transmission control step to be controlled in order.
  • the present disclosure comprises a wireless communication system including an access point device, a terminal device for periodically transmitting an uplink packet to the access point device, and another terminal device for receiving a downlink packet from the access point device.
  • the access point device in the above which is an arrival monitoring unit that monitors the arrival timing of an uplink packet from the terminal device, and an uplink packet from the terminal device based on the periodic arrival timing of the uplink packet from the terminal device.
  • An arrival prediction unit that predicts the future arrival timing of the terminal device, and a transmission control unit that controls the transmission timing of the downlink packet to the other terminal device so as to avoid the future arrival timing of the upstream packet from the terminal device.
  • It is an access point device characterized by being provided with.
  • the invention of the present disclosure can be realized by using the software control of the access point device without modifying / depending on the wireless communication method and the priority control standard of the access point device and the terminal device.
  • the arrival prediction unit sets the time width of the future arrival timing of the uplink packet from the terminal device based on the fluctuation of the arrival timing of the uplink packet from the terminal device, and the transmission control is performed.
  • the unit is a wireless communication system characterized in that the transmission timing of a downlink packet to the other terminal device is controlled so as to avoid the time width of the future arrival timing of the uplink packet from the terminal device.
  • the transmission timing of the downlink packet to the user terminal is controlled during the period excluding the fluctuation. be able to.
  • the arrival prediction unit predicts a plurality of future arrival timings of the uplink packet from the terminal device based on the periodic arrival timing of the uplink packet from the terminal device, and the transmission thereof.
  • the control unit is a wireless communication system characterized in that it controls the transmission timing of a downlink packet to the other terminal device so as to avoid the future adjacent arrival timing of the uplink packet from the terminal device.
  • the transmission timing of the downlink packet to the user terminal is controlled in a period substantially equal to the interval. can do.
  • the access point device executes preferential transmission of downlink packets to the other terminal device according to a business operator to which the other terminal device is dependent or a service used by the other terminal device. It is a wireless communication system characterized by including a buffer unit.
  • priority control can be executed in a unit of a specific business operator or service (a unit of a surveillance camera, an environment sensor, etc., and a user terminal such as a smartphone).
  • the wireless communication system of the first embodiment of the present disclosure The configuration of the wireless communication system of the first embodiment of the present disclosure is shown in FIG. FIG. 2 shows the processing of the wireless communication system of the first embodiment of the present disclosure.
  • the wireless communication system S includes an access point device 1, a terminal device 2-1 and 2-2, 2-3, and a control server 3.
  • the access point device 1 includes a transmission / reception unit 11, an arrival monitoring unit 12, an arrival prediction unit 13, a transmission control unit 14, and a buffer unit 15, and can also be realized by a computer and a priority control program shown in FIG.
  • the priority control program shown in FIG. 2 can be recorded on a recording medium or provided through a network.
  • the terminal devices 2-1 and 2-2 are user terminals such as smartphones, and mainly receive downlink packets from the access point device 1.
  • the terminal devices 2-3 are surveillance cameras, environment sensors, etc., and periodically transmit upstream packets mainly to the access point device 1.
  • the control server 3 distributes the control policy described below to the arrival monitoring unit 12, the arrival prediction unit 13, the transmission control unit 14, and the buffer unit 15 of the access point device 1.
  • the transmission / reception unit 11 periodically receives the uplink packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.), and periodically transmits the uplink packet to the host device of the access point device 1. Then, the downlink packet is received from the host device of the access point device 1, and the downlink packets D-1 and D-2 are transmitted to the terminal devices 2-1 and 2-2 (user terminals such as smartphones).
  • the wireless communication method Wi-Fi or the like
  • Wi-Fi is not particularly limited, and the detailed standard of Wi-Fi (a / b / g / n / ac / ax or the like) is not particularly limited.
  • the arrival monitoring unit 12 monitors the arrival timing, IP address, port number, etc. of the uplink packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.).
  • the arrival prediction unit 13 is from the terminal device 2-3 (surveillance camera, environment sensor, etc.) based on the periodic arrival timing of the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.).
  • the future arrival timing tk + 1 of the upstream packet U-3 is predicted.
  • the transmission control unit 14 avoids the future arrival timings tk and tk + 1 of the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.), so that the terminal device 2-1 and 2- 2 (User terminal such as a smartphone) Controls the transmission timing tk ⁇ t ⁇ tk + 1 of the downlink packets D-1 and D-2.
  • the buffer unit 15 queues the downlink packets D-1 and D-2 to the terminal devices 2-1 and 2-2 (user terminals such as smartphones) based on the transmission timing tk ⁇ t ⁇ tk + 1 . / Buffer / Drop packets.
  • the downlink packets D-1, D- to the terminal devices 2-1 and 2-2 (user terminals such as smartphones).
  • priority control can be executed.
  • the present invention is performed by using the software control of the access point device 1 without modifying / depending on the wireless communication method and the priority control standard of the access point device 1 and the terminal devices 2-1, 2-2, 2-3. The disclosed invention can be realized.
  • the arrival prediction unit 13 is from the terminal device 2-3 (surveillance camera, environment sensor, etc.) based on the fluctuation ⁇ t of the arrival timing of the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.).
  • the time width of the future arrival timing of the upstream packet U-3 may be set to t k ⁇ ⁇ t / 2 ⁇ t ⁇ t k + ⁇ t / 2, t k + 1 ⁇ ⁇ t / 2 ⁇ t ⁇ t k + 1 + ⁇ t / 2.
  • the buffer unit 15 transmits the downlink packets D-1 and D-2 to the terminal devices 2-1 and 2-2 (user terminals such as smartphones) with the time width tk ⁇ ⁇ t / 2 at the arrival timing.
  • the terminal devices 2-1 and 2-2 are excluded during the period excluding the fluctuation. It is possible to control the transmission timing of the downlink packets D-1 and D-2 to (a user terminal such as a smartphone). Then, after further considering the interval of the arrival timing of the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.), the terminal devices 2-1 and 2-in a period substantially equal to the interval. It is possible to control the transmission timing of the downlink packets D-1 and D-2 to 2 (user terminal such as a smartphone).
  • FIG. 4 shows the processing of the wireless communication system of the second embodiment of the present disclosure.
  • the business operator to which the terminal device 2-1 (user terminal such as a smartphone) is subordinate or the service used by the terminal device 2-1 is # 1. It is assumed that the business operator to which the terminal device 2-2 (user terminal such as a smartphone) is subordinate or the service used by the terminal device 2-2 is # 2. It is assumed that the business operator to which the terminal device 2-3 (surveillance camera, environment sensor, etc.) is subordinate, or the service used by the terminal device 2-3 is # 3.
  • the access point device 1 includes virtual processing units 16-1, 16-2, 16-3 corresponding to terminal devices 2-1, 2-2, and 2-3, and is provided with a computer and a priority control program shown in FIG. Can also be realized.
  • the priority control program shown in FIG. 4 can be recorded on a recording medium or provided through a network.
  • the control server 3 distributes the control policy described below to the arrival monitoring unit 12, the arrival prediction unit 13, the transmission control unit 14, and the buffer unit 15 of the access point device 1.
  • Virtual processing units 16-1, 16-2, 16-3 are VMs, containers, etc., and execute individual APP processing for business operators / services # 1, # 2, and # 3.
  • the buffer unit 15 is a terminal device depending on the business operator to which the terminal devices 2-1 and 2-2 (user terminals such as smartphones) are subordinate, or the services used by the terminal devices 2-1 and 2-2. Priority transmission of downlink packets D-1 and D-2 to 2-1 and 2-2 is executed.
  • the priority of downlink communication is set to medium.
  • the priority of downlink communication is set to the highest.
  • the priority of downlink communication is set to the lowest.
  • the buffer unit 15 sets the downlink packets D-1 and D-2 to the terminal devices 2-1 and 2-2 (user terminals such as smartphones) with the time width t of the arrival timing. It is stored in this order in k ⁇ t / 2 ⁇ t ⁇ t k + ⁇ t / 2, and in this order at the transmission timing t k + ⁇ t / 2 ⁇ t ⁇ tk + 1 ⁇ t / 2, regardless of the priority of downlink communication. Send.
  • the buffer unit 15 sets the downlink packets D-1 and D-2 to the terminal devices 2-1 and 2-2 (user terminals such as smartphones) with the time width t of the arrival timing. It is stored in this order in k ⁇ t / 2 ⁇ t ⁇ t k + ⁇ t / 2, and in the reverse order of the transmission timing t k + ⁇ t / 2 ⁇ t ⁇ t k + 1 ⁇ ⁇ t / 2 based on the priority of downlink communication. Send with.
  • priority control can be executed in units of specific businesses or services (units of surveillance cameras, environment sensors, etc., and user terminals such as smartphones).
  • the wireless communication system, wireless communication method, and access point device of the present disclosure can accommodate a surveillance camera, an environment sensor, and the like, and a user terminal such as a smartphone.
  • S Wireless communication system 1: Access point device 2-1, 2-2, 2-3: Terminal device 3: Control server 11: Transmission / reception unit 12: Arrival monitoring unit 13: Arrival prediction unit 14: Transmission control unit 15: Buffer Units 16-1, 16-2, 16-3: Virtual processing unit U-3: Upstream packet D-1, D-2: Downbound packet

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

Abstract

La présente divulgation concerne un système de communication sans fil S comprenant : un dispositif de point d'accès 1 ; un dispositif de terminal 2-3 qui transmet périodiquement un paquet de liaison montante au dispositif de point d'accès 1 ; et des dispositifs de terminal 2-1 et 2-2 qui reçoivent un paquet de liaison descendante provenant du dispositif de point d'accès 1, le système de communication sans fil étant caractérisé en ce que le dispositif de point d'accès 1 comprend une unité de surveillance d'arrivée 12 qui surveille la synchronisation d'arrivée du paquet amont provenant du dispositif de terminal 2-3, une unité de prédiction d'arrivée 13 qui prédit une future synchronisation d'arrivée du paquet de liaison montante provenant du dispositif de terminal 2-3, sur la base de la synchronisation d'arrivée périodique du paquet de liaison montante provenant du dispositif de terminal 2-3, et une unité de commande de transmission 14 qui commande la synchronisation de transmission du paquet de liaison descendante vers les dispositifs de terminal, 2-1, 2-2 de façon à éviter la future synchronisation d'arrivée du paquet de liaison montante provenant du dispositif de terminal 2-3.
PCT/JP2020/035424 2020-09-18 2020-09-18 Système de communication sans fil, procédé de communication sans fil, et dispositif de point d'accès WO2022059162A1 (fr)

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JP2022550285A JPWO2022059162A1 (fr) 2020-09-18 2020-09-18
PCT/JP2020/035424 WO2022059162A1 (fr) 2020-09-18 2020-09-18 Système de communication sans fil, procédé de communication sans fil, et dispositif de point d'accès

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PCT/JP2020/035424 WO2022059162A1 (fr) 2020-09-18 2020-09-18 Système de communication sans fil, procédé de communication sans fil, et dispositif de point d'accès

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006020142A (ja) * 2004-07-02 2006-01-19 Oki Electric Ind Co Ltd 送信制御装置、無線通信装置及び無線通信システム
JP2006229620A (ja) * 2005-02-17 2006-08-31 Tokyo Electric Power Co Inc:The パケット優先制御通信方法、基地局及び端末局
JP2007150859A (ja) * 2005-11-29 2007-06-14 Sharp Corp 受信装置、送信装置、通信システム、受信装置の制御プログラム、および受信装置の制御プログラムを記録した記録媒体
JP2015029218A (ja) * 2013-07-30 2015-02-12 パナソニック株式会社 通信装置、通信システム、及び通信方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006020142A (ja) * 2004-07-02 2006-01-19 Oki Electric Ind Co Ltd 送信制御装置、無線通信装置及び無線通信システム
JP2006229620A (ja) * 2005-02-17 2006-08-31 Tokyo Electric Power Co Inc:The パケット優先制御通信方法、基地局及び端末局
JP2007150859A (ja) * 2005-11-29 2007-06-14 Sharp Corp 受信装置、送信装置、通信システム、受信装置の制御プログラム、および受信装置の制御プログラムを記録した記録媒体
JP2015029218A (ja) * 2013-07-30 2015-02-12 パナソニック株式会社 通信装置、通信システム、及び通信方法

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