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WO2018012750A1 - Procédé, appareil et programme informatique permettant de sélectionner un canal dfs optimal pour une transmission de trafic de données basée sur un lan sans fil - Google Patents

Procédé, appareil et programme informatique permettant de sélectionner un canal dfs optimal pour une transmission de trafic de données basée sur un lan sans fil Download PDF

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Publication number
WO2018012750A1
WO2018012750A1 PCT/KR2017/006561 KR2017006561W WO2018012750A1 WO 2018012750 A1 WO2018012750 A1 WO 2018012750A1 KR 2017006561 W KR2017006561 W KR 2017006561W WO 2018012750 A1 WO2018012750 A1 WO 2018012750A1
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WIPO (PCT)
Prior art keywords
dfs
channel
optimal
service
dfs channel
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Ceased
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PCT/KR2017/006561
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English (en)
Korean (ko)
Inventor
송영금
신종화
정양석
허시영
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KT Corp
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KT Corp
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44227—Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network

Definitions

  • the present invention relates to a method, apparatus and computer program for selecting an optimal DFS channel for transmitting data traffic based on a wireless LAN. More specifically, the present invention relates to a channel by measuring a quality of a DFS channel in an environment where a user is actually provided with a service. After calculating the quality evaluation table, the user changes to an optimal DFS channel in consideration of the calculated channel quality evaluation table at the time when the user is not provided with the service, thereby preventing disconnection of the service for entering the DFS channel.
  • the present invention relates to a method, an apparatus, and a computer program for selecting an optimal DFS channel for transmitting WLAN-based data traffic that can be changed to an optimal DFS channel selected by reflecting an actual environment in which the service is provided.
  • a wireless local area network refers to a local area wireless network conforming to the IEEE 802.11 standard.
  • standards such as IEEE 802.11a, b, g, n, ac, etc. are established for wireless LANs and are applied to various wireless communication services.
  • wireless LAN uses ISM (Industrial, Scientific, Medical) band of 2.4 ⁇ 2.5GHz or 5GHz that anyone can use freely if certain rules are observed.
  • the ISM band is a frequency band defined for equipment used for industrial, scientific or medical purposes. If the radiated power is below the passion level, it can be used freely by anyone without permission.
  • the 5 GHz band of the WLAN frequency band has a wider frequency band than the 2.4 GHz band, there is an advantage that fewer external devices that can operate as noise.
  • This frequency band is called a dynamic frequency selection (DFS) band.
  • DFS dynamic frequency selection
  • the 2.4 GHz band can freely use any channel in the WLAN system, but the dynamic frequency selection (DFS) channel of the 5 GHz band must wait 60 seconds or longer to determine the existence of the radar signal before using it.
  • DFS dynamic frequency selection
  • DFS dynamic frequency selection
  • TPC transmit power control
  • WLAN devices operating in the 5 GHz frequency band must be able to detect and avoid radar signals as described above.
  • Many designs are designed to not use Dynamic Frequency Selection (DFS) channels.
  • DFS Dynamic Frequency Selection
  • the channel is selected based on the idle traffic and channel state. May be unable to select the optimal channel to reflect the actual usage environment in which the service is provided.
  • the present invention has been made to solve the above-mentioned problems of the prior art, and when entering a dynamic frequency selection (DFS) channel for the transmission of WLAN-based data traffic that can prevent service interruption due to the radar signal detection process It is an object of the present invention to provide a method, apparatus and computer program for selecting an optimal DFS channel.
  • DFS dynamic frequency selection
  • the present invention provides a channel quality in an actual use environment in which a user is provided with a predetermined service even when the user enters a dynamic frequency selection (DFS) channel at an idle hour when the user is not using a predetermined service.
  • An object of the present invention is to provide an optimal DFS channel selection method, apparatus, and computer program for transmitting WLAN-based data traffic capable of selecting an optimal DFS channel based on the evaluation.
  • the DFS channel selection method for solving the above problem is a method for the transmission device to select a DFS channel to transmit data traffic for a predetermined first service based on the wireless LAN to the receiving device, Collecting, by a receiving device, evaluation data for one or more DFS channels at the time when the first service is provided; Selecting an optimal DFS channel for transmission of the data traffic among the one or more DFS channels based on the collected evaluation data; And changing to the optimal DFS channel when the first service is not provided.
  • whether the first service is provided by comparing the amount of data traffic transmitted from the transmitting device with a first service traffic amount reference value required to provide the first service. It may include determining whether or not.
  • the receiving device compares the data traffic transmission amount transmitted from the transmission device with the idle traffic amount reference value, which is a reference value for determining whether the idle hour corresponds to the optimal DFS. It can be determined whether to change to the channel.
  • the receiving device may further collect evaluation data for the one or more DFS channels, and may be changed to an optimal DFS channel that is selected in consideration thereof.
  • the receiving device may calculate the evaluation data by measuring the one or more DFS channels.
  • the receiving device may receive the evaluation data for the one or more DFS channels measured by the transmitting device.
  • the receiving device may receive the evaluation data for the one or more DFS channels measured by a third device.
  • a DFS channel selection method includes a method for a transmitting device to select a DFS channel for transmitting data traffic for a predetermined first service based on a WLAN to a receiving device. Collecting assessment data for one or more DFS channels at the time the first service is provided; Selecting an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data; And changing to the optimal DFS channel when the first service is not provided.
  • a computer program according to another aspect of the present invention is a computer program stored in a computer readable medium for executing each step of the DFS channel selection method on a computer.
  • a transmitting apparatus is a transmitting apparatus for selecting a DFS channel to transmit data traffic for a predetermined first service and transmitting data traffic to a receiving apparatus based on a wireless LAN.
  • a channel estimation data collector configured to collect evaluation data of at least one DFS channel at a given time point;
  • An optimal channel selecting unit configured to select an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data;
  • a channel changer for changing to the optimal DFS channel when the first service is not provided.
  • a receiving apparatus is a receiving apparatus that selects a DFS channel to transmit data traffic for a predetermined first service and receives data traffic from a transmitting apparatus based on a wireless LAN.
  • a channel estimation data collector configured to collect evaluation data of at least one DFS channel at a given time point;
  • An optimal channel selecting unit configured to select an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data;
  • a channel changer for changing to the optimal DFS channel when the first service is not provided.
  • An optimal DFS channel selection method, apparatus, and computer program for transmitting WLAN-based data traffic may measure channel quality when a user is provided with a predetermined service such as watching video content. After calculating the evaluation table, when the user is not provided with the predetermined service, the service is disconnected according to the detection of the radar signal for entering the DFS channel by changing to the optimal DFS channel selected in consideration of the channel quality evaluation table.
  • the user can enter the optimal DFS channel that is selected by reflecting the actual usage environment in which the user is provided with a predetermined service such as watching video content, so that the channel quality of the non-DFS band is not good. Users in the WLAN environment can conveniently change to the optimal DFS channel.
  • FIG. 1 is an exemplary diagram illustrating a dynamic frequency selection (DFS) channel in a 5 GHz band.
  • DFS dynamic frequency selection
  • FIG. 2 is a block diagram of an optimal DFS channel selection system according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for selecting an optimal DFS channel in a receiving apparatus according to an embodiment of the present invention.
  • step S300 is an embodiment of step S300 in the optimal DFS channel selection method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for selecting an optimal DFS channel in a transmitting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a block diagram of an optimal DFS channel selection system using a third device according to an embodiment of the present invention.
  • FIG. 7 is a block diagram of a transmission apparatus for selecting an optimal DFS channel according to an embodiment of the present invention.
  • FIG. 8 is a block diagram of a receiving apparatus for selecting an optimal DFS channel according to an embodiment of the present invention.
  • first and second may be used to describe various components, but the components are not limited by the terms, and the terms are used to distinguish one component from another component. Used only as
  • FIG. 1 illustrates a channel configuration and a dynamic frequency selection (DFS) band of 5 GHz frequency band.
  • DFS dynamic frequency selection
  • each channel of the 5 GHz frequency band according to the IEEE 802.11a standard is disposed with a center frequency interval of 20 MHz.
  • the occupied frequency bandwidth of each channel is 20 MHz.
  • the channel used in the WLAN increases by channel number 4, and the interval of each channel is 20MHz.
  • the WLAN has a total of 200 channel numbers in 5MHz units from 5GHz to 6GHz. Here, each country is assigned a different channel of the 200 channel numbers to use.
  • a domestic wireless LAN as shown in Figure 1, channel number 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 149 A total of 19 channels, 153, 157 and 161, are used.
  • channel numbers 52 to 64 four channels
  • channel numbers 100 to 124 are specified by the IEEE 802.11h.
  • Frequency selective (DFS) standards must be applied.
  • the WLAN device when the WLAN device intends to use a channel of the DFS band, the WLAN device must check whether the radar signal exists in the channel to be used for 60 seconds or longer, and when the radar signal is found, the channel cannot be used. If the radar signal is not detected and the channel is used as a result of checking for 60 seconds or more, when the radar signal is detected during use, the radar signal must move to another channel not detected by the radar within 10 seconds. In addition, the WLAN device may not re- occupy a radar-detected channel for a predetermined time, and the channel may not be used for at least 30 minutes after the radar is detected.
  • the optimal DFS channel selection system 10 may include a transmitting device 100 and a receiving device 200, and the transmitting device 100.
  • the receiving device 200 may exchange data traffic for providing a predetermined first service such as IPTV streaming, video content provision, music content provision, and voice call provision through a wireless LAN such as WiFi (Wireless Fidelity).
  • the transmitting device 100 may be an access point (AP), and various devices capable of transmitting a wireless LAN signal such as WiFi may be adopted.
  • AP access point
  • WiFi wireless LAN signal
  • an IPTV terminal a wireless LAN-based video / music providing device, a wireless LAN-based calling device, or the like may be adopted as the receiving device 200.
  • the receiving device 200 receives a wireless LAN signal such as WiFi transmitted from the transmitting device 100. Therefore, various devices capable of providing a first service to a user may be included.
  • the optimal DFS channel selection system 10 in order to use the DFS band in the optimal DFS channel selection system 10 according to an embodiment of the present invention, it takes 60 seconds to detect the radar signal for the DFS band.
  • the optimal channel is selected based on the idle traffic and channel conditions. There may be a problem in that the user cannot select an optimal channel by reflecting the actual usage environment in which the first service is provided.
  • the channel quality ranking table is updated by measuring the quality of one or more DFS channels when the user is provided with the first service such as watching IPTV.
  • the first service is selected while entering the optimal DFS channel based on the channel quality ranking table at idle hour, thereby preventing the service from being disconnected while the user is being provided with the service. It can move to an optimal channel that can effectively handle the traffic needed to provide
  • the receiving device 200 may measure the quality of the one or more DFS channels. By measuring the quality of the at least one DFS channel in the receiving device 200 that is most affected by the channel quality, it is possible to select an optimal DFS channel most suitable for providing the first service.
  • the transmitter 100 may measure the quality of the one or more DFS channels. That is, it may be difficult to measure the quality of the at least one DFS channel depending on the operation state of the receiving device 200. Also, depending on the type or characteristic of the receiving device 200, the receiving device ( Since the measurement data may be changed according to the change of the position of the device 200, etc., the transmitter 100 may measure the quality of the at least one DFS channel.
  • the optimal channel may be selected.
  • FIG. 3 is a flowchart illustrating a method for selecting an optimal DFS channel in the receiving apparatus 200 according to an embodiment of the present invention.
  • the transmitting apparatus 100 determines a predetermined value based on a WLAN to the receiving apparatus 200.
  • a method of selecting a DFS channel for transmitting data traffic for a first service comprising: collecting, by the receiving apparatus, evaluation data for one or more DFS channels at the time when the first service is provided (S110). Selecting an optimal DFS channel for transmission of the data traffic among the one or more DFS channels based on the collected evaluation data (S120) and changing to the optimal DFS channel when the first service is not provided ( S130) may be included.
  • step S110 the reception device 200 collects evaluation data for one or more DFS channels at the time when the first service is provided.
  • the reception apparatus 200 determines whether the first service is provided by comparing the data traffic transmission amount transmitted from the transmission device 100 with a first service traffic transmission reference value required for providing the first service. can do.
  • the receiving device 200 transmits a traffic transmission reference value for a preset IPTV streaming service and is transmitted from the transmitting device 100 at the present time. By comparing the data traffic transmission amount, it may be determined whether the user is provided with an IPTV streaming service.
  • the receiving device 200 may measure the quality of the one or more DFS channels by itself, and the one or more receiving devices 200 may measure the quality of the one or more DFS channels. After transmitting a message for measuring the quality of the DFS channel, the transmission device 100 may receive the evaluation data for the one or more DFS channels.
  • the receiving device 200 transmits a message for measuring the quality of the one or more DFS channels directly to the third device 300 or through the transmitting device 100. Afterwards, evaluation data for the one or more DFS channels measured by the third device 300 may be received.
  • the third device 300 may be an access point (AP), another receiving device, or a wireless LAN extender.
  • the receiving device 200 may measure the quality of the DFS channel.
  • various devices capable of transmitting to the transmitting device 100 may be used. Accordingly, the receiving device 200 measures the quality of the one or more DFS channels by using the third device 300, thereby irrespective of the operating state of the receiving device 200. It is possible to measure quality effectively.
  • the transmitting device 100, the receiving device 200, or the third device 300 receives the quality of the one or more DFS channels while receiving a first service such as an IPTV service using a non-DFS channel or a DFS channel.
  • a first service such as an IPTV service using a non-DFS channel or a DFS channel.
  • various background scanning techniques such as off-channel scanning, may be used.
  • one or more of the following information may be collected and used to evaluate the quality of the one or more DFS channels.
  • the number of APs used in each channel may be additionally considered.
  • a power table of each AP set for each frequency band may be additionally considered.
  • RSSI received signal strength indication
  • the evaluation data for the one or more DFS channels may be repeatedly collected according to a predetermined time interval, or a plurality of times without a time interval (for example, when a specific condition is satisfied). You can also collect.
  • the reception apparatus 200 may determine a predetermined reference value based on the reception (Rx) traffic or the transmission (Tx) and the reception (Rx) traffic (that is, the total (Tx + Rx) traffic at a specific time). If greater than the threshold, quality data for one or more DFS channels may be collected.
  • step S120 the reception apparatus 200 selects an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data.
  • step S130 the optimal DFS channel is changed when the first service is not provided.
  • the reception apparatus 200 determines whether the first service is provided by comparing the data traffic transmission amount transmitted from the transmission device 100 with a first service traffic transmission reference value required for providing the first service. can do.
  • the receiving device 200 compares the data traffic transmission amount transmitted from the transmitting device 100 with the idle traffic amount reference value, which is a reference value for determining whether the idle hour corresponds to the idle time. It may be determined whether it is in an idle state, and the inconvenience that a user may experience may be minimized by changing to the DFS channel from the receiving device 200 in an idle state.
  • the idle traffic amount reference value which is a reference value for determining whether the idle hour corresponds to the idle time. It may be determined whether it is in an idle state, and the inconvenience that a user may experience may be minimized by changing to the DFS channel from the receiving device 200 in an idle state.
  • the receiving device 200 collects evaluation data for the one or more DFS channels, selects the optimal DFS channel in consideration of this, and then selects the finally selected optimal DFS channel. You can also change to a DFS channel. Accordingly, not only the evaluation data for the channel when the first service is provided, but also the evaluation data for the channel when the first service is not provided (for example, in an idle state). Considering them together, the optimal DFS channel can be selected. In this case, a weight may be given to the evaluation data regarding the actual use environment of the user.
  • step S300 illustrates an implementation of step S300 in the method for selecting an optimal DFS channel according to an embodiment of the present invention described above.
  • the receiving device 200 determines whether the current time corresponds to a preset idle hour.
  • the user may set the idle hour in advance, or a value preset in the receiving device 200 may be used.
  • the receiving device 200 may calculate an idle hour for the user in consideration of the usage pattern of the user.
  • step S132 it is determined whether the channel used by the receiving device 200 is a non-DFS channel.
  • step S133 it is determined whether the current reception device 200 is in an idle state by comparing the amount of data traffic at the present time with a predetermined idle traffic volume reference value.
  • the reception apparatus 200 scans one or more DFS channels to update evaluation data for each channel (S134).
  • a DFS channel scan is performed for each channel by a predetermined number of repetitions at a predetermined time interval through comparison with a predetermined measurement interval reference value (ie, time interval) and measurement repetition reference values (S135 and S136). After updating the evaluation data, it is possible to perform a channel change to the selected optimal DFS channel (S137).
  • FIG. 5 is a flowchart illustrating a method for selecting an optimal DFS channel in the transmission apparatus 100 according to an embodiment of the present invention.
  • the transmitting apparatus 100 is determined based on a WLAN to the receiving apparatus 200.
  • a method of selecting a DFS channel for transmitting data traffic for a first service comprising: collecting, by the transmitting device 100, evaluation data for one or more DFS channels at the time when the first service is provided (S210). Selecting an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data (S220) and changing to the optimal DFS channel when the first service is not provided ( S230) may be included.
  • step S210 the transmission device 100 collects evaluation data for one or more DFS channels at the time when the first service is provided.
  • the transmitting device 100 determines whether the first service is provided by comparing the data traffic transmission amount transmitted to the receiving device 200 with a first service traffic transmission reference value required for providing the first service. can do.
  • the transmitting device 100 transmits a traffic transmission reference value for a preset IPTV streaming service and is transmitted to the receiving device 200 at the present time. By comparing the data traffic transmission amount, it may be determined whether the user is provided with an IPTV streaming service.
  • the transmitting device 100 measures the quality of the one or more DFS channels.
  • the transmitting device 100 transmits a message for measuring the quality of the one or more DFS channels to the receiving device 200, and then, for the one or more DFS channels measured by the receiving device 200. Evaluation data may also be sent.
  • the transmitting device 100 transmits a message for measuring the quality of the one or more DFS channels to the third device 300 and then the third device 300.
  • the evaluation data for the one or more DFS channels measured at may be transmitted.
  • the third device 300 may be an access point (AP), another receiving device, or a wireless LAN extender, and in addition to measuring the quality of the DFS channel, the transmitting device 100 Various devices capable of transmitting to the network may be used.
  • AP access point
  • another receiving device or a wireless LAN extender
  • the transmitting device 100 Various devices capable of transmitting to the network may be used.
  • the transmitting device 100 transmits the provision of a service to the receiving device 200 or another receiving device (not shown) by measuring the quality of the one or more DFS channels using the third device 300.
  • the quality of the one or more DFS channels can be effectively measured regardless of the operational state of the device 100.
  • one or more of the following information may be collected and used to evaluate the quality of the one or more DFS channels.
  • the number of APs used in each channel may be additionally considered.
  • a power table of each AP set for each frequency band may be additionally considered.
  • RSSI received signal strength indication
  • step S210 the evaluation data for the one or more DFS channels are repeatedly collected according to a predetermined time interval, or a plurality of times are collected without a time interval (for example, when a specific condition is satisfied). You may.
  • the transmitting apparatus 100 may determine a predetermined reference value based on the reception (Rx) traffic or the transmission (Tx) and the reception (Rx) traffic (that is, the total (Tx + Rx) traffic at a specific time). If greater than the threshold, quality data for one or more DFS channels may be collected.
  • step S220 the transmission device 100 selects an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data.
  • step S230 the optimal DFS channel is changed when the first service is not provided.
  • the transmitting device 100 determines whether the first service is provided by comparing the data traffic transmission amount transmitted to the receiving device 200 with a first service traffic transmission reference value required for providing the first service. can do.
  • the transmitting device 100 compares the data traffic transmission amount transmitted to the receiving device 200 with the idle traffic amount reference value, which is a reference value for determining whether the idle hour corresponds to the idle time. It may be determined whether it is in an idle state, and the inconvenience that a user may experience may be minimized by changing to the DFS channel from the receiving device 200 in an idle state.
  • the idle traffic amount reference value which is a reference value for determining whether the idle hour corresponds to the idle time. It may be determined whether it is in an idle state, and the inconvenience that a user may experience may be minimized by changing to the DFS channel from the receiving device 200 in an idle state.
  • the transmitting device 100 collects the evaluation data for the one or more DFS channels, selects the optimal DFS channel in consideration of this, and then selects the finally selected optimal channel. You can also change to a DFS channel. Accordingly, not only the evaluation data for the channel when the first service is provided, but also the evaluation data for the channel when the first service is not provided (for example, in an idle state). Considering them together, the optimal DFS channel can be selected. In this case, a weight may be given to the evaluation data regarding the actual use environment of the user.
  • FIG. 7 illustrates a configuration diagram of a transmitter 100 for selecting an optimal DFS channel according to an embodiment of the present invention.
  • the apparatus 100 for selecting an optimal DFS channel selects a DFS channel to transmit data traffic for a predetermined first service and based on a WLAN.
  • a transmission device 100 for transmitting data traffic to the reception device 200 may include a channel estimation data collection unit 110, an optimal channel selection unit 120, and a channel changer 130.
  • the transmission apparatus 100 for selecting an optimal DFS channel according to an embodiment of the present invention will be divided for each component.
  • a detailed description of the apparatus 100 for selecting an optimal DFS channel according to an embodiment of the present invention may be inferred from the description of the method for selecting an optimal DFS channel according to an embodiment of the present invention. The detailed description is omitted below.
  • the channel estimation data collection unit 110 collects evaluation data for one or more DFS channels at the time when the first service is provided.
  • the channel estimation data collection unit 110 compares the data traffic transmission amount transmitted to the receiving device 200 with the first service traffic transmission reference value required for providing the first service, and is whether the first service is provided. You can also determine whether or not.
  • the channel evaluation data collection unit 110 may collect evaluation data for the one or more DFS channels measured by the transmission device 100, or the reception device 200 or the third device 300. Measurement data for one or more measured DFS channels may be received.
  • the optimal channel selector 120 selects an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data.
  • the channel changer 130 changes to the optimal DFS channel when the first service is not provided.
  • the channel changing unit 130 compares the data traffic transmission amount transmitted to the receiving device with the idle traffic transmission reference value, which is a reference value for determining whether the idle hour corresponds to the optimal DFS channel. You can also judge.
  • the channel changer 130 may further collect evaluation data for the one or more DFS channels, and change the channel data to an optimal DFS channel that is selected by considering them together.
  • FIG. 8 illustrates a configuration diagram of a receiving apparatus 200 for selecting an optimal DFS channel according to an embodiment of the present invention.
  • the reception apparatus 200 for selecting an optimal DFS channel selects a DFS channel to transmit data traffic for a predetermined first service and based on a WLAN.
  • the reception device 200 receiving data traffic from the transmission device 100 may include a channel estimation data collector 210, an optimal channel selector 220, and a channel changer 230.
  • the receiving apparatus 200 for selecting an optimal DFS channel according to an embodiment of the present invention is divided for each component.
  • a detailed description of the reception apparatus 200 for selecting an optimal DFS channel according to an embodiment of the present invention may be inferred from the description of the method for selecting an optimal DFS channel according to an embodiment of the present invention described above. The detailed description is omitted below.
  • the channel estimation data collection unit 210 collects evaluation data for one or more DFS channels at the time when the first service is provided.
  • the channel estimation data collection unit 210 compares the data traffic transmission amount transmitted from the transmission device 100 with the first service traffic transmission reference value required to provide the first service, and is whether the first service is provided. You can also determine whether or not.
  • the channel evaluation data collection unit 210 may collect evaluation data for the one or more DFS channels measured by the receiving apparatus 200, or in the transmitting apparatus 100 or the third apparatus 300 Measurement data for one or more measured DFS channels may be received.
  • the optimal channel selector 220 selects an optimal DFS channel for transmitting the data traffic among the one or more DFS channels based on the collected evaluation data.
  • the channel changer 230 changes to the optimal DFS channel when the first service is not provided.
  • the channel changing unit 230 compares the data traffic transmission amount transmitted from the transmission apparatus with the idle traffic transmission reference value, which is a reference value for determining whether the idle hour is corresponding to whether to change to the optimal DFS channel. You can also judge.
  • the channel changer 230 may further collect evaluation data regarding the one or more DFS channels, and change the channel data into an optimal DFS channel that is selected by considering them together.

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

Abstract

La présente invention concerne un procédé, un appareil et un programme informatique permettant de sélectionner un canal DFS optimal en vue de transmettre un trafic de données sur la base d'un LAN sans fil et, plus particulièrement, un procédé, un appareil, et un programme informatique permettant de sélectionner un canal DFS optimal en vue d'une transmission de trafic de données basée sur un LAN sans fil, qui calcule un tableau d'évaluation de qualité de canal en effectuant une mesure de qualité de canal DFS dans un environnement où un service est réellement fourni à un utilisateur, puis, lorsque le service n'est pas fourni à l'utilisateur, qui déplace le LAN sans fil vers un canal DFS optimal en considérant le tableau d'évaluation de qualité de canal calculé, ce qui permet de sélectionner un canal DFS optimal dans lequel l'environnement de fourniture de service réel pour l'utilisateur est réfléchi et de déplacer le LAN sans fil vers le canal DFS optimal sélectionné tout en empêchant l'interruption du service en raison de l'entrée du canal DFS. L'invention porte sur un procédé permettant de sélectionner un canal DFS en vue de transmettre, par un dispositif de transmission, un trafic de données pour un premier service prédéfini à un dispositif de réception, sur la base d'un LAN sans fil, le procédé comprenant les étapes consistant : à collecter, par le dispositif de réception, des données d'évaluation pour un ou plusieurs canaux DFS à un moment où le premier service est fourni ; à sélectionner, sur la base des données d'évaluation collectées, un canal DFS optimal en vue de la transmission du trafic de données parmi le ou les canaux DFS ; et à effectuer un déplacement vers le canal DFS optimal à un moment où le premier service n'est pas fourni.
PCT/KR2017/006561 2016-07-15 2017-06-22 Procédé, appareil et programme informatique permettant de sélectionner un canal dfs optimal pour une transmission de trafic de données basée sur un lan sans fil Ceased WO2018012750A1 (fr)

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KR1020160090040A KR102105685B1 (ko) 2016-07-15 2016-07-15 무선랜 기반 데이터 트래픽 전송을 위한 최적 dfs 채널 선택 방법, 장치 및 컴퓨터 프로그램
KR10-2016-0090040 2016-07-15

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US20020181417A1 (en) * 2001-05-08 2002-12-05 Richa Malhotra Wireless LAN with dynamic channel selection
US20110096739A1 (en) * 2009-10-27 2011-04-28 Sam Heidari Channel scanning and channel selection in a wireless communication network
US20130194944A1 (en) * 2012-01-27 2013-08-01 Eren Soyak System and Method To Avoid Interference With Radar Systems
JP2015095838A (ja) * 2013-11-13 2015-05-18 日本電信電話株式会社 無線通信システム、無線通信端末、システム基地局、無線ｌａｎ基地局
US20150289142A1 (en) * 2012-11-12 2015-10-08 Nippon Telegraph And Telephone Corporation Wireless communication apparatus, wireless communication system, and wireless communication method

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US6870815B2 (en) 2003-01-30 2005-03-22 Atheros Communications, Inc. Methods for implementing a dynamic frequency selection (DFS) and a temporary channel selection feature for WLAN devices

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Publication number Priority date Publication date Assignee Title
US20020181417A1 (en) * 2001-05-08 2002-12-05 Richa Malhotra Wireless LAN with dynamic channel selection
US20110096739A1 (en) * 2009-10-27 2011-04-28 Sam Heidari Channel scanning and channel selection in a wireless communication network
US20130194944A1 (en) * 2012-01-27 2013-08-01 Eren Soyak System and Method To Avoid Interference With Radar Systems
US20150289142A1 (en) * 2012-11-12 2015-10-08 Nippon Telegraph And Telephone Corporation Wireless communication apparatus, wireless communication system, and wireless communication method
JP2015095838A (ja) * 2013-11-13 2015-05-18 日本電信電話株式会社 無線通信システム、無線通信端末、システム基地局、無線ｌａｎ基地局

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