WO2022059162A1 - Wireless communication system, wireless communication method, and access point device - Google Patents

Wireless communication system, wireless communication method, and access point device 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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terminal device
access point
arrival
uplink packet
wireless communication
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PCT/JP2020/035424
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French (fr)
Japanese (ja)
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亮太 椎名
稔久 藤原
真也 玉置
友宏 谷口
一貴 原
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日本電信電話株式会社
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Priority to JP2022550285A priority Critical patent/JPWO2022059162A1/ja
Priority to PCT/JP2020/035424 priority patent/WO2022059162A1/en
Publication of WO2022059162A1 publication Critical patent/WO2022059162A1/en

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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]

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  • 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

Abstract

The present disclosure is a wireless communication system S comprising: an access point device 1; a terminal device 2-3 which periodically transmits an uplink packet to the access point device 1; and terminal devices 2-1 and 2-2 which receive a downlink packet from the access point device 1, the wireless communication system being characterized in that the access point device 1 includes an arrival monitoring unit 12 which monitors the arrival timing of the upstream packet from the terminal device 2-3, an arrival prediction unit 13 which predicts a future arrival timing of the uplink packet from the terminal device 2-3, on the basis of the periodic arrival timing of the uplink packet from the terminal device 2-3, and a transmission control unit 14 which controls the transmission timing of the downlink packet to the terminal devices 2-1, 2-2 so as to avoid the future arrival timing of the uplink packet from the terminal device 2-3.

Description

無線通信システム、無線通信方法及びアクセスポイント装置Wireless communication system, wireless communication method and access point device
　本開示は、アクセスポイント装置を用いる無線通信システムに関する。 The present disclosure relates to a wireless communication system using an access point device.
　近年では、無線利用の需要からＷｉ－Ｆｉ（登録商標）を利用するサービスが広がりつつある。そして、有線接続ではなく無線接続（例えば、Ｗｉ－Ｆｉ）を利用する監視カメラ及び環境センサ等が増えている。しかし、有線接続と比べて無線接続（特に、無線ＬＡＮ）において、監視カメラ及び環境センサ等は、通信品質の高さ及び情報提供の確実性に影響を受けやすい（例えば、非特許文献１を参照）。そして、一つの無線ＬＡＮ中の一台のアクセスポイント装置が、スマートフォン等のユーザ端末から監視カメラ及び環境センサ等に及ぶ多様な端末装置を収容するときには、監視カメラ及び環境センサ等は、接続端末数の突発的増加等により、通信品質の高さ及び情報提供の確実性に影響を受けやすい。 In recent years, services using Wi-Fi (registered trademark) are expanding due to the demand for wireless use. Further, the number of surveillance cameras and environment sensors that use wireless connections (for example, Wi-Fi) instead of wired connections is increasing. However, in a wireless connection (particularly wireless LAN) as compared with a wired connection, 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). ). When one access point device in one wireless LAN accommodates various terminal devices ranging from user terminals such as smartphones to surveillance cameras and environment sensors, 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.
　監視カメラ及び環境センサ等が、通信品質の高さ及び情報提供の確実性に影響を受けにくくするために、非特許文献２、３に開示された技術を適用することができる。ここで、非特許文献２では、特定パケットの優先制御技術として、ＭＡＣ層のキュー制御を実行し、特定パケットを優先的に送出する、ＱｏＳ制御方式８０２．１１ｅが開示されている。そして、非特許文献３では、通信品質の安定化技術として、複数の無線区間の通信品質を予測し、複数の無線リソースを予測的に切り替える、品質予測技術が開示されている。 The technology disclosed in 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. Here, 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. Further, 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.
　しかし、非特許文献２では、特定パケットの優先制御技術が有効になるために、アクセスポイント装置及び端末装置の両方が優先制御規格に対応している必要がある。仮に、一台でも端末装置が優先制御規格に対応していなければ、優先制御の全体最適が乱されてしまい、意図せぬパケット衝突が生じてしまう。特に、監視カメラ及び環境センサ等からの上りパケットの増加に伴って、スマートフォン等のユーザ端末への下りパケットとの間において、意図せぬパケット衝突が生じてしまい、無線通信システム全体での帯域利用効率が低下してしまう。そして、非特許文献３では、通信品質の安定化技術は開示されているが、特定の事業者又はサービスの単位での優先制御技術は開示されていない。 However, in 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.
　そこで、前記課題を解決するために、本開示は、アクセスポイント装置を用いる無線通信システムにおいて、いずれかの端末装置が優先制御規格に対応していなくても、監視カメラ及び環境センサ等からの上りパケットの増加に関わらず、スマートフォン等のユーザ端末への下りパケットとの間において、意図せぬパケット衝突を生じさせないことにより、無線通信システム全体での帯域利用効率を改善することを目的とする。 Therefore, in order to solve the above-mentioned problems, 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.
　前記課題を解決するために、監視カメラ及び環境センサ等からの上りパケットの定期性に着目する。そして、アクセスポイント装置は、監視カメラ及び環境センサ等からの上りパケットの定期的な到来タイミングに基づいて、監視カメラ及び環境センサ等からの上りパケットの将来の到来タイミングを予測する。さらに、アクセスポイント装置は、監視カメラ及び環境センサ等からの上りパケットの将来の到来タイミングを回避するように、スマートフォン等のユーザ端末への下りパケットの送出タイミングを制御する。 In order to solve the above problem, pay attention to the regularity of upstream packets from surveillance cameras, environment sensors, etc. Then, 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.
　具体的には、本開示は、アクセスポイント装置と、前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、前記アクセスポイント装置から下りパケットを受信する他の端末装置と、を備える無線通信システムであって、前記アクセスポイント装置は、前記端末装置からの上りパケットの到来タイミングを監視する到来監視部と、前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測部と、前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御部と、を備えることを特徴とする無線通信システムである。 Specifically, 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. In a wireless communication system, 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.
　また、本開示は、アクセスポイント装置と、前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、前記アクセスポイント装置から下りパケットを受信する他の端末装置と、を備える無線通信システムにおける無線通信方法であって、前記アクセスポイント装置は、前記端末装置からの上りパケットの到来タイミングを監視する到来監視ステップと、前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測ステップと、前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御ステップと、を順に実行することを特徴とする無線通信方法である。 Further, 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.
　また、本開示は、アクセスポイント装置と、前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、前記アクセスポイント装置から下りパケットを受信する他の端末装置と、を備える無線通信システムにおけるアクセスポイント装置であって、前記端末装置からの上りパケットの到来タイミングを監視する到来監視部と、前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測部と、前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御部と、を備えることを特徴とするアクセスポイント装置である。 Further, 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.
　これらの構成によれば、監視カメラ及び環境センサ等からの上りパケットについて、スマートフォン等のユーザ端末への下りパケットと比べて、優先制御を実行することができる。そして、監視カメラ及び環境センサ等からの上りパケットと、スマートフォン等のユーザ端末への下りパケットと、の間のパケット衝突を防止することができる。よって、無線通信システム全体での帯域利用効率を改善することができる。さらに、アクセスポイント装置及び端末装置の無線通信方式及び優先制御規格に手を加えず／依存せず、アクセスポイント装置のソフトウェア制御を用いて、本開示の発明を実現することができる。 According to these configurations, it is possible to execute priority control for uplink packets from surveillance cameras, environment sensors, etc., as compared with downlink packets to user terminals such as smartphones. Then, it is possible to prevent a packet collision between an uplink packet from a surveillance camera, an environment sensor, or the like and a downlink packet to a user terminal such as a smartphone. Therefore, it is possible to improve the band utilization efficiency of the entire wireless communication system. Further, 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.
　また、本開示は、前記到来予測部は、前記端末装置からの上りパケットの到来タイミングの揺らぎに基づいて、前記端末装置からの上りパケットの将来の到来タイミングの時間幅を設定し、前記送出制御部は、前記端末装置からの上りパケットの将来の到来タイミングの時間幅を回避するように、前記他の端末装置への下りパケットの送出タイミングを制御することを特徴とする無線通信システムである。 Further, in the present disclosure, 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.
　この構成によれば、監視カメラ及び環境センサ等からの上りパケットの到来タイミングの揺らぎをさらに考慮したうえで、当該揺らぎを除く期間において、スマートフォン等のユーザ端末への下りパケットの送出タイミングを制御することができる。 According to this configuration, after further considering the fluctuation of the arrival timing of the upstream packet from the surveillance camera, the environment sensor, etc., the transmission timing of the downlink packet to the user terminal such as a smartphone is controlled during the period excluding the fluctuation. be able to.
　また、本開示は、前記到来予測部は、前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の複数回の到来タイミングを予測し、前記送出制御部は、前記端末装置からの上りパケットの将来の隣接する到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御することを特徴とする無線通信システムである。 Further, in the present disclosure, 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.
　この構成によれば、監視カメラ及び環境センサ等からの上りパケットの到来タイミングの間隔をさらに考慮したうえで、当該間隔にほぼ等しい期間において、スマートフォン等のユーザ端末への下りパケットの送出タイミングを制御することができる。 According to this configuration, after further considering the interval of the arrival timing of the uplink packet from the surveillance camera, the environment sensor, etc., the transmission timing of the downlink packet to the user terminal such as a smartphone is controlled in a period substantially equal to the interval. can do.
　また、本開示は、前記アクセスポイント装置は、前記他の端末装置が従属する事業者又は前記他の端末装置が利用するサービスに応じて、前記他の端末装置への下りパケットの優先送出を実行するバッファ部、を備えることを特徴とする無線通信システムである。 Further, in the present disclosure, 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.
　この構成によれば、特定の事業者又はサービスの単位（監視カメラ及び環境センサ等と、スマートフォン等のユーザ端末と、の単位）での優先制御を実行することができる。 According to this configuration, 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).
　このように、本開示は、アクセスポイント装置を用いる無線通信システムにおいて、いずれかの端末装置が優先制御規格に対応していなくても、監視カメラ及び環境センサ等からの上りパケットの増加に関わらず、スマートフォン等のユーザ端末への下りパケットとの間において、意図せぬパケット衝突を生じさせないことにより、無線通信システム全体での帯域利用効率を改善することができる。 As described above, in the present disclosure, in a wireless communication system using an access point device, even if any of the terminal devices does not support the priority control standard, regardless of the increase in upstream packets from the surveillance camera, environment sensor, etc. By preventing unintended packet collisions with downlink packets to user terminals such as smartphones, it is possible to improve the band utilization efficiency of the entire wireless communication system.
本開示の第１実施形態の無線通信システムの構成を示す図である。It is a figure which shows the structure of the wireless communication system of 1st Embodiment of this disclosure. 本開示の第１実施形態の無線通信システムの処理を示す図である。It is a figure which shows the process of the wireless communication system of 1st Embodiment of this disclosure. 本開示の第２実施形態の無線通信システムの構成を示す図である。It is a figure which shows the structure of the wireless communication system of 2nd Embodiment of this disclosure. 本開示の第２実施形態の無線通信システムの処理を示す図である。It is a figure which shows the process of the wireless communication system of 2nd Embodiment of this disclosure.
　添付の図面を参照して本開示の実施形態を説明する。以下に説明する実施形態は本開示の実施の例であり、本開示は以下の実施形態に制限されるものではない。 An embodiment of the present disclosure will be described with reference to the accompanying drawings. The embodiments described below are examples of the embodiments of the present disclosure, and the present disclosure is not limited to the following embodiments.
（本開示の第１実施形態の無線通信システム）
　本開示の第１実施形態の無線通信システムの構成を図１に示す。本開示の第１実施形態の無線通信システムの処理を図２に示す。無線通信システムＳは、アクセスポイント装置１、端末装置２－１、２－２、２－３及び制御サーバ３を備える。 (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.
　アクセスポイント装置１は、送受信部１１、到来監視部１２、到来予測部１３、送出制御部１４及びバッファ部１５を備え、コンピュータ及び図２に示した優先制御プログラムによっても実現することができる。図２に示した優先制御プログラムは、記録媒体に記録することもでき、ネットワークを通じて提供することもできる。 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.
　端末装置２－１、２－２は、スマートフォン等のユーザ端末であり、主としてアクセスポイント装置１から下りパケットを受信する。端末装置２－３は、監視カメラ及び環境センサ等であり、主としてアクセスポイント装置１へと上りパケットを定期的に送信する。 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.
　制御サーバ３は、以下に説明する制御ポリシを、アクセスポイント装置１の到来監視部１２、到来予測部１３、送出制御部１４及びバッファ部１５に配信する。 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.
　送受信部１１は、端末装置２－３（監視カメラ及び環境センサ等）から上りパケットＵ－３を定期的に受信し、アクセスポイント装置１の上位装置へと上りパケットを定期的に送信する。そして、アクセスポイント装置１の上位装置から下りパケットを受信し、端末装置２－１、２－２（スマートフォン等のユーザ端末）へと下りパケットＤ－１、Ｄ－２を送信する。ここで、無線通信方式（Ｗｉ－Ｆｉ等）は特に限定されず、Ｗｉ－Ｆｉの詳細規格（ａ／ｂ／ｇ／ｎ／ａｃ／ａｘ等）も特に限定されない。 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). Here, the wireless communication method (Wi-Fi or the like) is not particularly limited, and the detailed standard of Wi-Fi (a / b / g / n / ac / ax or the like) is not particularly limited.
　到来監視部１２は、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の到来タイミング、ＩＰアドレス及びポート番号等を監視する。 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.).
　到来予測部１３は、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の定期的な到来タイミングに基づいて、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の将来の到来タイミングｔｋ、ｔｋ＋１を予測する。 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.
　送出制御部１４は、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の将来の到来タイミングｔｋ、ｔｋ＋１を回避するように、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２の送出タイミングｔｋ＜ｔ＜ｔｋ＋１を制御する。バッファ部１５は、当該送出タイミングｔｋ＜ｔ＜ｔｋ＋１に基づいて、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２について、キューイング／バッファリング／パケット廃棄を実行する。 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.
　つまり、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３について、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２と比べて、優先制御を実行することができる。そして、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３と、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２と、の間のパケット衝突を防止することができる。よって、無線通信システムＳ全体での帯域利用効率を改善することができる。さらに、アクセスポイント装置１及び端末装置２－１、２－２、２－３の無線通信方式及び優先制御規格に手を加えず／依存せず、アクセスポイント装置１のソフトウェア制御を用いて、本開示の発明を実現することができる。 That is, with respect to the uplink packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.), the downlink packets D-1, D- to the terminal devices 2-1 and 2-2 (user terminals such as smartphones). Compared with 2, priority control can be executed. Then, the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.) and the downlink packets D-1, D- to the terminal devices 2-1 and 2-2 (user terminals such as smartphones). It is possible to prevent a packet collision between 2 and 2. Therefore, it is possible to improve the band utilization efficiency of the entire wireless communication system S. Further, 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.
　到来予測部１３は、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の到来タイミングの揺らぎΔｔに基づいて、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の将来の到来タイミングの時間幅ｔｋ－Δｔ／２≦ｔ≦ｔｋ＋Δｔ／２、ｔｋ＋１－Δｔ／２≦ｔ≦ｔｋ＋１＋Δｔ／２を設定してもよい。 The arrival prediction unit 13 is from the terminal device 2-3 (surveillance camera, environment sensor, etc.) based on the fluctuation Δt 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 − Δt / 2 ≦ t ≦ t k + Δt / 2, t k + 1 − Δt / 2 ≦ t ≦ t k + 1 + Δt / 2.
　送出制御部１４は、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の将来の到来タイミングの時間幅ｔｋ－Δｔ／２≦ｔ≦ｔｋ＋Δｔ／２、ｔｋ＋１－Δｔ／２≦ｔ≦ｔｋ＋１＋Δｔ／２を回避するように、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２の送出タイミングｔｋ＋Δｔ／２＜ｔ＜ｔｋ＋１－Δｔ／２（期間Δξ＝ｔｋ＋１－ｔｋ－Δｔ）を制御してもよい。バッファ部１５は、当該送出タイミングｔｋ＋Δｔ／２＜ｔ＜ｔｋ＋１－Δｔ／２（期間Δξ＝ｔｋ＋１－ｔｋ－Δｔ）に基づいて、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２について、キューイング／バッファリング／パケット廃棄を実行してもよい。図２では、バッファ部１５は、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２を、当該到来タイミングの時間幅ｔｋ－Δｔ／２≦ｔ≦ｔｋ＋Δｔ／２に格納し、待ち時間を経て、当該送出タイミングｔｋ＋Δｔ／２＜ｔ＜ｔｋ＋１－Δｔ／２（期間Δξ＝ｔｋ＋１－ｔｋ－Δｔ）に送出する。 The transmission control unit 14 has a time width t k − Δt / 2 ≦ t ≦ t k + Δt / 2, t of the future arrival timing of the upstream packet U-3 from the terminal device 2-3 (surveillance camera, environment sensor, etc.). Transmission timing t of downlink packets D-1 and D-2 to terminal devices 2-1 and 2-2 (user terminals such as smartphones) so as to avoid k + 1 −Δt / 2 ≦ t ≦ t k + 1 + Δt / 2. You may control k + Δt / 2 <t <t k + 1 − Δt / 2 (period Δξ = t k + 1 −t k − Δt). The buffer unit 15 has terminal devices 2-1 and 2-2 (smartphones and the like) based on the transmission timing tk + Δt / 2 <t <tk + 1 −Δt / 2 (period Δξ = tk + 1 −tk − Δt). Queue / buffering / packet discard may be executed for the downlink packets D-1 and D-2 to the user terminal). In FIG. 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 − Δt / 2 at the arrival timing. It is stored in ≦ t ≦ tk + Δt / 2, and is sent at the transmission timing t k + Δt / 2 <t <t k + 1 − Δt / 2 (period Δξ = t k + 1 −t k − Δt) after a waiting time.
　つまり、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の到来タイミングの揺らぎをさらに考慮したうえで、当該揺らぎを除く期間において、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２の送出タイミングを制御することができる。そして、端末装置２－３（監視カメラ及び環境センサ等）からの上りパケットＵ－３の到来タイミングの間隔をさらに考慮したうえで、当該間隔にほぼ等しい期間において、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２の送出タイミングを制御することができる。 That is, after further considering the fluctuation 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 2-2 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).
（本開示の第２実施形態の無線通信システム）
　本開示の第２実施形態の無線通信システムの構成を図３に示す。本開示の第２実施形態の無線通信システムの処理を図４に示す。以下では、本開示の第２実施形態が、本開示の第１実施形態と比べて、相違する部分について、主として説明する。 (The wireless communication system of the second embodiment of the present disclosure)
The configuration of the wireless communication system of the second embodiment of the present disclosure is shown in FIG. FIG. 4 shows the processing of the wireless communication system of the second embodiment of the present disclosure. In the following, the differences between the second embodiment of the present disclosure and the first embodiment of the present disclosure will be mainly described.
　端末装置２－１（スマートフォン等のユーザ端末）が従属する事業者、又は、当該端末装置２－１が利用するサービスは、＃１であるとする。端末装置２－２（スマートフォン等のユーザ端末）が従属する事業者、又は、当該端末装置２－２が利用するサービスは、＃２であるとする。端末装置２－３（監視カメラ及び環境センサ等）が従属する事業者、又は、当該端末装置２－３が利用するサービスは、＃３であるとする。 It is assumed that 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.
　アクセスポイント装置１は、端末装置２－１、２－２、２－３に対応する仮想処理部１６－１、１６－２、１６－３を備え、コンピュータ及び図４に示した優先制御プログラムによっても実現することができる。図４に示した優先制御プログラムは、記録媒体に記録することもでき、ネットワークを通じて提供することもできる。 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.
　制御サーバ３は、以下に説明する制御ポリシを、アクセスポイント装置１の到来監視部１２、到来予測部１３、送出制御部１４及びバッファ部１５に配信する。 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.
　仮想処理部１６－１、１６－２、１６－３は、ＶＭ又はコンテナ等であり、事業者／サービス＃１、＃２、＃３について、個別のＡＰＰ処理を実行する。 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.
　バッファ部１５は、端末装置２－１、２－２（スマートフォン等のユーザ端末）が従属する事業者、又は、当該端末装置２－１、２－２が利用するサービスに応じて、当該端末装置２－１、２－２への下りパケットＤ－１、Ｄ－２の優先送出を実行する。 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.
　端末装置２－１（スマートフォン等のユーザ端末）について、下り通信の優先度は、中程度に設定されている。端末装置２－２（スマートフォン等のユーザ端末）について、下り通信の優先度は、最も高く設定されている。端末装置２－３（監視カメラ及び環境センサ等）について、下り通信の優先度は、最も低く設定されている。 For the terminal device 2-1 (user terminal such as a smartphone), the priority of downlink communication is set to medium. For the terminal device 2-2 (user terminal such as a smartphone), the priority of downlink communication is set to the highest. For terminal devices 2-3 (surveillance cameras, environment sensors, etc.), the priority of downlink communication is set to the lowest.
　第１実施形態の図２では、バッファ部１５は、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２を、上記到来タイミングの時間幅ｔｋ－Δｔ／２≦ｔ≦ｔｋ＋Δｔ／２にこの順序で格納し、下り通信の優先度に関わらず、上記送出タイミングｔｋ＋Δｔ／２＜ｔ＜ｔｋ＋１－Δｔ／２にこの順序で送出する。 In FIG. 2 of the first embodiment, 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 −Δt / 2 ≦ t ≦ t k + Δt / 2, and in this order at the transmission timing t k + Δt / 2 <t <tk + 1 −Δt / 2, regardless of the priority of downlink communication. Send.
　第２実施形態の図４では、バッファ部１５は、端末装置２－１、２－２（スマートフォン等のユーザ端末）への下りパケットＤ－１、Ｄ－２を、上記到来タイミングの時間幅ｔｋ－Δｔ／２≦ｔ≦ｔｋ＋Δｔ／２にこの順序で格納し、下り通信の優先度に基づいて、上記送出タイミングｔｋ＋Δｔ／２＜ｔ＜ｔｋ＋１－Δｔ／２に逆の順序で送出する。 In FIG. 4 of the second embodiment, 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 −Δt / 2 ≦ t ≦ t k + Δt / 2, and in the reverse order of the transmission timing t k + Δt / 2 <t <t k + 1 − Δt / 2 based on the priority of downlink communication. Send with.
　つまり、特定の事業者又はサービスの単位（監視カメラ及び環境センサ等と、スマートフォン等のユーザ端末と、の単位）での優先制御を実行することができる。 That is, 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).
　本開示の無線通信システム、無線通信方法及びアクセスポイント装置は、監視カメラ及び環境センサ等と、スマートフォン等のユーザ端末と、を収容することができる。 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：無線通信システム
１：アクセスポイント装置
２－１、２－２、２－３：端末装置
３：制御サーバ
１１：送受信部
１２：到来監視部
１３：到来予測部
１４：送出制御部
１５：バッファ部
１６－１、１６－２、１６－３：仮想処理部
Ｕ－３：上りパケット
Ｄ－１、Ｄ－２：下りパケット 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

Claims (6)

  1. 　アクセスポイント装置と、
    　前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、
    　前記アクセスポイント装置から下りパケットを受信する他の端末装置と、
    　を備える無線通信システムであって、
    　前記アクセスポイント装置は、
    　前記端末装置からの上りパケットの到来タイミングを監視する到来監視部と、
    　前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測部と、
    　前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御部と、
    　を備えることを特徴とする無線通信システム。     Access point device and
    A terminal device that periodically sends an uplink packet to the access point device,
    With other terminal devices that receive downlink packets from the access point device,
    It is a wireless communication system equipped with
    The access point device is
    An arrival monitoring unit that monitors the arrival timing of upstream packets from the terminal device,
    An arrival prediction unit that predicts the future arrival timing of the uplink packet from the terminal device based on the periodic arrival timing of the uplink packet from the terminal device.
    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 uplink packet from the terminal device.
    A wireless communication system characterized by being provided with.
  2. 　前記到来予測部は、前記端末装置からの上りパケットの到来タイミングの揺らぎに基づいて、前記端末装置からの上りパケットの将来の到来タイミングの時間幅を設定し、
    　前記送出制御部は、前記端末装置からの上りパケットの将来の到来タイミングの時間幅を回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する
    　ことを特徴とする、請求項１に記載の無線通信システム。     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.
    The transmission control unit is characterized in that it controls the transmission timing of a downlink packet to the other terminal device so as to avoid the time width of the future arrival timing of the uplink packet from the terminal device. The wireless communication system according to 1.
  3. 　前記到来予測部は、前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の複数回の到来タイミングを予測し、
    　前記送出制御部は、前記端末装置からの上りパケットの将来の隣接する到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する
    　ことを特徴とする、請求項１又は２に記載の無線通信システム。     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.
    The transmission control unit is 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. Or the wireless communication system according to 2.
  4. 　前記アクセスポイント装置は、
    　前記他の端末装置が従属する事業者又は前記他の端末装置が利用するサービスに応じて、前記他の端末装置への下りパケットの優先送出を実行するバッファ部、
    　を備えることを特徴とする、請求項１から３のいずれかに記載の無線通信システム。     The access point device is
    A buffer unit that executes preferential transmission of downlink packets to the other terminal device according to the business to which the other terminal device depends or the service used by the other terminal device.
    The wireless communication system according to any one of claims 1 to 3, wherein the wireless communication system is provided.
  5. 　アクセスポイント装置と、
    　前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、
    　前記アクセスポイント装置から下りパケットを受信する他の端末装置と、
    　を備える無線通信システムにおける無線通信方法であって、
    　前記アクセスポイント装置は、
    　前記端末装置からの上りパケットの到来タイミングを監視する到来監視ステップと、
    　前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測ステップと、
    　前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御ステップと、
    　を順に実行することを特徴とする無線通信方法。     Access point device and
    A terminal device that periodically sends an uplink packet to the access point device,
    With other terminal devices that receive downlink packets from the access point device,
    It is a wireless communication method in a wireless communication system including
    The access point device is
    An arrival monitoring step for monitoring the arrival timing of upstream packets from the terminal device, and
    An arrival prediction step that predicts the future arrival timing of the uplink packet from the terminal device based on the periodic arrival timing of the uplink packet from the terminal device.
    A transmission control step that controls 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.
    A wireless communication method characterized by executing in order.
  6. 　アクセスポイント装置と、
    　前記アクセスポイント装置へと上りパケットを定期的に送信する端末装置と、
    　前記アクセスポイント装置から下りパケットを受信する他の端末装置と、
    　を備える無線通信システムにおけるアクセスポイント装置であって、
    　前記端末装置からの上りパケットの到来タイミングを監視する到来監視部と、
    　前記端末装置からの上りパケットの定期的な到来タイミングに基づいて、前記端末装置からの上りパケットの将来の到来タイミングを予測する到来予測部と、
    　前記端末装置からの上りパケットの将来の到来タイミングを回避するように、前記他の端末装置への下りパケットの送出タイミングを制御する送出制御部と、
    　を備えることを特徴とするアクセスポイント装置。     Access point device and
    A terminal device that periodically sends an uplink packet to the access point device,
    With other terminal devices that receive downlink packets from the access point device,
    An access point device in a wireless communication system including
    An arrival monitoring unit that monitors the arrival timing of upstream packets from the terminal device,
    An arrival prediction unit that predicts the future arrival timing of the uplink packet from the terminal device based on the periodic arrival timing of the uplink packet from the terminal device.
    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 uplink packet from the terminal device.
    An access point device characterized by being equipped with.
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Citations (4)

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JP2006020142A (en) * 2004-07-02 2006-01-19 Oki Electric Ind Co Ltd Transmission controller, radio communication apparatus, and radio communication system
JP2006229620A (en) * 2005-02-17 2006-08-31 Tokyo Electric Power Co Inc:The Packet priority control communication method, base station and terminal station
JP2007150859A (en) * 2005-11-29 2007-06-14 Sharp Corp Receiver, transmitter, communication system, control program of receiver and recording medium having control program of receiver recorded thereon
JP2015029218A (en) * 2013-07-30 2015-02-12 パナソニック株式会社 Communication apparatus, communication system and communication method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006020142A (en) * 2004-07-02 2006-01-19 Oki Electric Ind Co Ltd Transmission controller, radio communication apparatus, and radio communication system
JP2006229620A (en) * 2005-02-17 2006-08-31 Tokyo Electric Power Co Inc:The Packet priority control communication method, base station and terminal station
JP2007150859A (en) * 2005-11-29 2007-06-14 Sharp Corp Receiver, transmitter, communication system, control program of receiver and recording medium having control program of receiver recorded thereon
JP2015029218A (en) * 2013-07-30 2015-02-12 パナソニック株式会社 Communication apparatus, communication system and communication method

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