WO2018034458A1 - Procédé et appareil destinés à la transmission d'un trafic de données basé sur un lan sans fil, et programme informatique - Google Patents

Procédé et appareil destinés à la transmission d'un trafic de données basé sur un lan sans fil, et programme informatique Download PDF

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Publication number
WO2018034458A1
WO2018034458A1 PCT/KR2017/008662 KR2017008662W WO2018034458A1 WO 2018034458 A1 WO2018034458 A1 WO 2018034458A1 KR 2017008662 W KR2017008662 W KR 2017008662W WO 2018034458 A1 WO2018034458 A1 WO 2018034458A1
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Prior art keywords
data frame
frame
channel
data
primary channel
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PCT/KR2017/008662
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English (en)
Korean (ko)
Inventor
신종화
송영금
정양석
허시영
Original Assignee
주식회사 케이티
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Priority claimed from KR1020160103777A external-priority patent/KR20180019804A/ko
Priority claimed from KR1020160104179A external-priority patent/KR102167777B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2018034458A1 publication Critical patent/WO2018034458A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to a method, an apparatus, and a computer program for transmitting data traffic based on a WLAN. More specifically, the present invention relates to more efficient use of radio resources by changing a primary channel, and also to RTS / CTS control.
  • the present invention relates to a wireless LAN-based data traffic transmission method, apparatus, and computer program for transmitting a data frame based on a radio resource reservation to guarantee a quality of service (QoS) for a multimedia service.
  • QoS quality of service
  • a wireless local area network refers to a local area wireless network conforming to the IEEE 802.11 standard.
  • wireless LAN uses 2.4 ⁇ 2.5 GHz or 5 GHz ISM (Industrial, Scientific, Medical) bands, and various applications can be performed without special permission if anyone keeps certain requirements such as keeping radiated power below a certain level.
  • ISM Industrial, Scientific, Medical
  • IEEE 802.11ac Since then, IEEE 802.11ac has been able to change the dynamic bandwidth and transmit a request to send (RTS) frame to each sub channel, thereby allowing data to be transmitted only in the bandwidth of the sub channel on which the clear to send (CTS) response has come (Fig. 1 (a)).
  • the IEEE 802.11 standard reserves radio resources through request to send (RTS) / clear to send (CTS) control to transmit data from other nodes while a specific access point (AP) is transmitting data to a particular station. To limit it.
  • RTS request to send
  • CTS clear to send
  • the conventional IEEE 802.11 standard defines a threshold value (RTS Threshold) of a frame size to which the RTS / CTS control is applied, and applies a RTS / CTS control to a data frame having a size larger than the threshold value (RTS Threshold).
  • RTS Threshold a threshold value of a frame size to which the RTS / CTS control is applied
  • RTS Threshold a threshold value of a frame size to which the RTS / CTS control is applied
  • RTS Threshold the threshold value
  • the RTS / CTS control may be applied according to the type of data frame such as multimedia traffic, or the RTS / CTS control may be applied to a specific receiving terminal such as a multimedia receiving device.
  • QoS quality of service
  • the present invention was devised to solve the above problems of the prior art, and when the primary channel is occupied by another AP or interference, the primary channel and the primary channel cannot be used as a data transmission channel even when the secondary channel is idle. It is an object of the present invention to provide a method and apparatus for transmitting data traffic based on a WLAN that can solve a problem of transmitting only a primary channel even when an idle channel exists when an adjacent secondary channel is occupied by another AP or interference.
  • the present invention is to determine the type of data frame to be transmitted, such as multimedia traffic, in consideration of this, by guaranteeing the quality of service (QoS) for multimedia services by transmitting the data frame by reserving radio resources through RTS / CTS control, etc.
  • An object of the present invention is to provide a method and apparatus for transmitting data traffic based on WLAN.
  • the present invention is a wireless LAN that can guarantee the quality of service (QoS) for multimedia services, such as by transmitting a data frame by reserving a radio resource through a RTS / CTS control, etc. for a specific predetermined receiving terminal such as a multimedia receiving device
  • QoS quality of service
  • An object of the present invention is to provide a data traffic transmission method and apparatus based on the above.
  • the present invention is a wireless LAN-based data that can transmit data frames by reserving radio resources through RTS / CTS control, etc. in order to ensure the quality of service (QoS) for multimedia services, while maintaining the IEEE 802.11 standard
  • An object of the present invention is to provide a traffic transmission method and apparatus.
  • the dynamic bandwidth change method is a plurality of channels including a primary channel and a secondary channel for transmitting and receiving data with the STA (Station) Allocating a channel assignment step; And a primary channel changing step of transmitting an RTS frame to the STA in each of the plurality of channels and changing a primary channel when a CTS frame is not received in at least one of the primary channel and the secondary channel.
  • the primary channel changing step when the CTS frame is received in any one or more channels other than the primary channel without receiving the CTS frame in the primary channel, any of the channels in which the CTS frame is received. You can change the primary channel with one.
  • the primary channel changing step when the CTS frame is received in all the channels other than the secondary channel without receiving the CTS frame in the secondary channel, the primary channel is changed to any one of the remaining channels other than the primary channel and the secondary channel. You can change the primary channel.
  • the changing of the primary channel may include calculating a clear channel assessment (CCA) value in a channel in which the CTS frame is received; And changing the primary channel based on the calculated CCA value.
  • CCA clear channel assessment
  • a method for changing a dynamic bandwidth includes a channel allocation unit for allocating a plurality of channels including a primary channel and a secondary channel for data transmission and reception with a STA (Station); A transceiver for transmitting an RTS frame to the STA and receiving a CTS frame from the STA in each of the plurality of channels; And a primary channel changing unit for changing a primary channel when a CTS frame is not received in at least one of the primary channel and the secondary channel. It may include.
  • a data frame transmission method for transmitting a data frame by reserving a radio resource in a WLAN, comprising: selecting a category of a data frame to be transmitted by the sender; And if the category of the data frame to be transmitted is included in a preset category list, reserving a radio resource and transmitting the radio resource to a receiver so as to prevent interference by another node.
  • the category list is defined in addition to a predefined threshold item for setting a reference value for the reservation of the radio resource, and the sender may select a data frame to which the radio resource is reserved and transmitted using the category list. Can be.
  • the second data frame may be transmitted after transmitting the first data frame and the third data frame through one RTS / CTS control.
  • the number of the third data frame may be limited to a predetermined reference value or less.
  • a client list is further defined in the threshold item, and radio resources may be reserved and transmitted for data frames corresponding to both the category list and the client list.
  • the receiver may be included or included in the client list.
  • a data frame transmission method a method for transmitting a data frame by reserving a radio resource in a wireless LAN, comprising: calculating identification information of a receiver for a data frame to be transmitted by a sender; And if the receiver's identification information for the data frame to be transmitted is included in a predetermined client list, reserving and transmitting radio resources to prevent interference by other nodes.
  • the client list is defined in addition to a predefined threshold item for setting a reference value for the reservation of the radio resource, and the sender selects a data frame to which the radio resource is reserved and transmitted using the client list. can do.
  • the second data frame may be transmitted after transmitting the first data frame and the third data frame through one RTS / CTS control.
  • the number of the third data frame may be limited to a predetermined reference value or less.
  • a computer program according to another aspect of the invention is characterized in that it is a computer program stored on a computer readable recording medium for executing each step of the method described above on a computer.
  • the RTS / CTS By transmitting the data frame based on the radio resource reservation using the control, the quality of service (QoS) for the multimedia service can be guaranteed.
  • QoS quality of service
  • 1 is a view illustrating a bandwidth operation method and a problem in the conventional IEEE 802.11 a / b / g / n / ac.
  • FIG. 2 shows each configuration of a wireless LAN system according to the present invention.
  • FIG. 3 is a flowchart illustrating a dynamic bandwidth changing method in a WLAN system according to the present invention.
  • FIG. 4 is a view for explaining an example of a dynamic bandwidth change method in a WLAN system according to the present invention.
  • FIG. 5 is for explaining another example of a dynamic bandwidth change method in a WLAN system according to the present invention.
  • FIG. 6 illustrates a configuration of an apparatus for changing a dynamic bandwidth in a wireless LAN environment according to the present invention.
  • FIG. 7 is an explanatory diagram for data frame transmission based on RTS / CTS control.
  • FIG. 8 is a configuration diagram of a data frame transmission system based on radio resource reservation in a WLAN according to an embodiment of the present invention.
  • FIG. 9 is a flowchart illustrating a data frame transmission method based on radio resource reservation in a WLAN according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating a method of adjusting a data frame transmission order according to an embodiment of the present invention.
  • FIG. 11 is a flowchart illustrating a data frame transmission method based on radio resource reservation in a WLAN according to another embodiment of the present invention.
  • FIG. 12 is a block diagram of a data frame transmission system based on radio resource reservation in a wireless LAN using various senders and receivers according to an embodiment of the present invention.
  • FIGS. 13 and 14 are diagrams illustrating a structure of a data frame transmission apparatus based on radio resource reservation in a WLAN 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. Only used as
  • FIG. 2 shows each configuration of a wireless LAN system according to the present invention.
  • the WLAN system may include an AP 20, a STA 30, and a communication network 10 for wirelessly connecting the AP 20 and the STA 30. have.
  • the AP 20 is a functional medium that provides data through a wireless medium for an associated station (STA) associated with it. Since the WLAN environment is constantly changing, the AP 20 may periodically measure the state of each channel for stable data transmission to the STA 30, and determine a channel change based on the corresponding measured value. In particular, the primary channel and the secondary channel can be determined and assigned.
  • STA station
  • the STA 30 is a functional medium including a medium access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface to a wireless medium.
  • the concept includes all of the STA. However, in the present invention, it is assumed that the STA 30 is a non-AP STA for convenience of description.
  • the STA 30 receives data from the AP 20 and operates according to the function of each STA 30. As shown in FIG. 2, the STA 30 may include an IPTV, a PC, a laptop, a smart phone, and the like.
  • the communication network 10 mediates data transmission and reception between the AP 20 and the STA 30, and may include a wired network and a wireless network.
  • the communication network 10 is assumed to be a wireless network.
  • the communication network 10 may include a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and the like.
  • LAN local area network
  • MAN metropolitan area network
  • WAN wide area network
  • the communication network 10 according to the present invention is not limited to the networks listed above, but may include a known wireless data network.
  • FIG. 3 is a flowchart illustrating a dynamic bandwidth changing method in a WLAN system according to the present invention.
  • a method of changing a dynamic bandwidth in a WLAN system includes an access point (AP) 20 including a primary channel and a secondary channel for data transmission / reception with an STA (station) 30. It may be configured to include a channel allocation step (S310) for allocating a plurality of channels and the step (S320) for changing the primary channel.
  • AP access point
  • S310 channel allocation step
  • S320 step
  • the AP 20 may allocate a plurality of channels including a primary channel and a secondary channel for data transmission and reception with the STA 30.
  • a primary channel and a secondary channel for data transmission and reception with the STA 30.
  • Wi-Fi only supported 20 MHz channels
  • the IEEE 802.11n standard started supporting 40 MHz channels, and from IEEE 802.11ac to 80 MHz and 160 MHz channels.
  • the WLAN system according to the present invention is a 40MHz channel, only the primary channel and the secondary channel are allocated, and if the 80MHz channel, the primary channel, the secondary channel, the tertiary channel, and the quaternary channel can be allocated. If higher bandwidth is greater, more channel allocation may be required.
  • the primary channel allocated in the previous step may be changed to effectively use the radio resource.
  • the transmitting terminal transmits a request to send (RTS) frame over a wide band, and the target terminal transmits a clear to send (CTS) frame according to the channel bandwidth currently available to the terminal. Is transmitted to the transmitting terminal.
  • RTS request to send
  • CTS clear to send
  • the AP 20 transmits an RTS frame to the STA 30, and when the CTS frame is not received in any one or more channels of the assigned primary channel and secondary channel, You can change the channel.
  • the first embodiment is a case in which the CTS frame is not received in the primary channel and the CTS frame is received only in at least one channel other than the remaining channels
  • the second embodiment is the CTS frame in the secondary channel. This is the case where the CTS frame is received on all the channels other than the secondary channel without being received.
  • FIG. 4 illustrates an example of a dynamic bandwidth changing method in a WLAN system according to a first embodiment of the present invention.
  • the AP 20 may change the existing tertiary channel to be a new primary channel. At this time, the existing quaternary channel may be changed to a secondary channel.
  • FIG. 5 illustrates an example of a dynamic bandwidth changing method in a WLAN system according to a second embodiment of the present invention.
  • the AP 20 Since the CTS frame is not received in the assigned secondary channel, and the CTS frame is received in all of the remaining primary channel, tertiary channel, and quaternary channel, the AP 20 makes sure that any one of the existing tertiary channel and quaternary channel is a new primary channel. You can change it.
  • FIG. 6 illustrates a configuration of a dynamic bandwidth changing AP device in a WLAN environment according to the present invention.
  • the dynamic bandwidth changing AP device in the WLAN system may include a channel allocator 21, a transceiver 22, and a channel changer 23.
  • the channel allocator 21 may allocate a plurality of channels including a primary channel and a secondary channel to transmit and receive data with the STA.
  • the plurality of channels may further include a tertiary channel and a quaternary channel on the premise of the 80 MHz band.
  • the transceiver 22 may transmit a RTS frame to the STA in order to check the state of the plurality of channels, and receive the CTS frame from the STA again, thereby confirming the state of each channel.
  • the channel changing unit 23 may change the primary channel when the CTS frame is not received in at least one of the primary channel and the secondary channel.
  • the primary channel can be changed to any one of the channels in which the CTS frame is received. have.
  • the primary channel may be changed to any one of the remaining channels other than the primary channel and the secondary channel.
  • CCA clear channel assessment
  • the STA 30 may transmit a Channel Switch Announcement (CSA) frame.
  • CSA Channel Switch Announcement
  • FIG. 7 is an explanatory diagram for data frame transmission based on radio resource reservation.
  • the RTS / CTS control is applied to a data frame having a size larger than a predetermined value (0 to 2347 octets) as the RTS threshold, thereby occupying a specific radio link. It can be used for transmitting a data frame by reservation.
  • a transmitting terminal to transmit a data frame transmits a request to send (RTS) frame, and if there is no other signal being transmitted and received, the receiving terminal transmits a clear to send (CTS). Send a frame to respond. Accordingly, all other terminals sensing the RTS or CTS frame have limited data transmission for a predetermined time (Network Allocation Vector).
  • the RTS / CTS control mechanism will be described in more detail with reference to FIG. 7 as follows.
  • the transmitting terminal checks the idle state of the channel, waits for the distributed inter-frame space (DIFS), and then transmits an RTS frame.
  • DIFS distributed inter-frame space
  • the receiving terminal waits for short inter-frame space (SIFS) and then transmits the CTS frame.
  • SIFS short inter-frame space
  • the transmitting terminal waits for SIFS and then starts transmitting data frames.
  • the receiving terminal After receiving the data frame, the receiving terminal waits for SIFS and transmits an ACK frame.
  • the RTS / CTS frame includes time information (NAV) necessary for data transmission. Accordingly, terminals not related to the transmission of the frame wait without transmitting for the time, thereby transmitting the data frame. It is possible to suppress the interference to.
  • NAV time information
  • the conventional IEEE 802.11 standard determines whether to apply the RTS / CTS control mechanism by using a reference value for the size of the data frame set in the preset RTS threshold (RTS threshold), whereby the data frame for multimedia services, etc.
  • RTS threshold preset RTS threshold
  • the present invention extends the RTS / CTS control method according to the IEEE 802.11 standard so that the data frame to be transmitted is a predetermined type of data frame such as multimedia data, or the receiving terminal of the data frame to be transmitted can be multimedia.
  • the data frame is transmitted based on RTS / CTS control, thereby ensuring a quality of service (QoS) for a multimedia service.
  • QoS quality of service
  • the RTS / CTS control mechanism is typically used to reserve a radio link when a terminal wanting to transmit data transmits multiple frames or long frames (that is, when there is a large amount of data to be transmitted).
  • it can be controlled by setting an attribute of the RTS threshold.
  • the RTS Threshold can be set to a value between 0 and 2347 octets, and when transmitting a data frame having a size smaller than the RTS Threshold, the RTS / CTS control mechanism is not applied. do.
  • the RTS Threshold is set to 0, the RTS / CTS control mechanism may be applied to all data frames and transmitted.
  • FIG. 8 is a block diagram of a data traffic transmission system 50 based on radio resource reservation using RTS / CTS control in a WLAN according to an embodiment of the present invention.
  • the data traffic transmission system 50 based on the radio resource reservation using the RTS / CTS control in the WLAN according to an embodiment of the present invention uses the sender 100 and the receiver 200.
  • the sender 100 and the receiver 200 transmit and receive a predetermined data frame through a wireless LAN such as Wi-Fi (Wireless Fidelity).
  • Wi-Fi Wireless Fidelity
  • the sender 100 is an RTS when the data frame to be transmitted is a predetermined type of data frame such as multimedia data, or when the receiver 200 of the data frame to be transmitted is a specific receiving terminal such as a multimedia receiving device.
  • the data frame based on radio resource reservation using / CTS control, etc., it is possible to improve the transmission quality of data traffic to be transmitted, such as multimedia traffic, and to ensure the quality of service (QoS) for the multimedia service using the same. .
  • the sender 100 may be a device for transmitting a wireless LAN signal such as an access point (AP), in addition to a wired or wireless terminal having a wireless LAN module such as a smartphone, a tablet, a personal PC, a laptop, and the like.
  • a wireless LAN module such as a smartphone, a tablet, a personal PC, a laptop, and the like.
  • Various devices capable of transmitting WLAN signals may also be used as the sender 100.
  • the receiver 200 may be a set-top box for an IPTV service or the like, or predetermined multimedia traffic such as a smart phone, a tablet, a personal PC, a laptop, etc. from the sender 100 through a wireless LAN such as Wi-Fi. It may be a terminal used to receive a data traffic of the to provide a predetermined service, such as a multimedia service.
  • the sender 100 selects a category of the data frame and controls the data frame in the RTS / CTS control when the sender 100 corresponds to a preset category to transmit the data frame using RTS / CTS control.
  • the radio resources such as a specific radio link or a wireless LAN channel are reserved for use by another node and transmitted to the receiver 200.
  • the RTS / CTS control procedure according to the WLAN standard may be used, but the present invention is not limited thereto, and other nodes may use radio resources such as a specific radio link or a WLAN channel. If the method can be reserved so that it can not be applied without special restrictions.
  • a category list is defined and used in addition to a predefined threshold item such as an RTS threshold used for the RTS / CTS control. Accordingly, one or more categories may be set in the category list and used to determine whether to reserve a radio resource using RTS / CTS control or the like when transmitting a data frame.
  • the multimedia category includes the video category AC_VI in the RTS category list and transmits the data frame by applying RTS / CTS control to the data frame having the AC_VI category.
  • QoS quality of service
  • the WMM access category based on the IEEE 802.11e-based Wi-Fi Multimedia (WMM) priority class is divided into four categories: AC_BE, AC_BK, AC_VI, and AC_VO, according to an embodiment of the present invention.
  • the RTS / CTS control-based data frame transmission system 50 in a WLAN may apply an RTS / CTS control using an access category based on the WMM Priority Class as a category of a data frame.
  • the category list may be defined in addition to the RTS threshold based on the frame size according to the conventional RTS / CTS standard, wherein the category of the data frame may be selected from one or more of AC_BE, AC_BK, AC_VI, and AC_VO. Can be. Accordingly, a data frame (eg, AC_VI corresponding to multimedia traffic) corresponding to an access category included in the category list may be transmitted by reserving radio resources through RTS / CTS control. .
  • the category of the data frame is not limited to four of AC_BE, AC_BK, AC_VI, and AC_VO according to the WMM access category, and some of the four categories may be used, and other categories May be further defined and used.
  • FIG. 9 illustrates a flowchart of a data frame transmission method based on radio resource reservation in a WLAN according to an embodiment of the present invention.
  • the data frame transmission method based on the radio resource reservation in a WLAN according to an embodiment of the present invention a method for transmitting a data frame by reserving a radio resource in the WLAN, the sender ( Selecting a category of the data frame to be transmitted (S110) and when the category of the data frame to be transmitted is included in a preset category list, reserves a radio resource to prevent interference by another node. It may include the step of transmitting to the receiver (200) (S120).
  • step S110 the sender 100 selects a category of a data frame to be transmitted.
  • the category of the data frame includes some or all categories of AC_BE, AC_BK, AC_VI, and AC_VO defined by a WMM Access Category based on an IEEE 802.11e-based Wi-Fi Multimedia (WMM) priority class. Can be used as a category of data frames.
  • WMM Wi-Fi Multimedia
  • the category of the data frame is not limited to four of AC_BE, AC_BK, AC_VI, and AC_VO according to the WMM access category, and some of the four categories may be used, and other categories may be used. May be further defined and used.
  • step S120 when the category of the data frame to be transmitted is included in a preset category list, the radio resource is reserved and transmitted to the receiver 200 using RTS / CTS control.
  • the category list is defined in addition to a predefined threshold item such as an RTS threshold used for the RTS / CTS control. Accordingly, one or more categories may be set in the category list and used to determine whether to reserve a radio resource using RTS / CTS control or the like when transmitting a data frame.
  • a predetermined category including some or all of AC_BE, AC_BK, AC_VI, and AC_VO defined as a WMM Access Category based on the Wi-Fi Multimedia (WMM) priority class may be included in the data frame. Can be used as a category.
  • the category list is defined in addition to a predefined threshold item such as an RTS threshold based on a frame size according to the RTS / CTS standard, and at least one of AC_BE, AC_BK, AC_VI, and AC_VO as a category of the data frame. It may be selected from the category containing. Accordingly, a data frame (eg, AC_VI corresponding to multimedia traffic) corresponding to an access category included in the category list is reserved and transmitted by using a RTS / CTS control or the like. Quality of service (QoS) of the used multimedia service can be guaranteed.
  • a predefined threshold item such as an RTS threshold based on a frame size according to the RTS / CTS standard
  • AC_BE based on a frame size according to the RTS / CTS standard
  • AC_VO AC_VO
  • a data frame eg, AC_VI corresponding to multimedia traffic
  • QoS Quality of service
  • FIG. 10 illustrates a method of adjusting a data frame transmission order according to an embodiment of the present invention.
  • one or more first data frames eg, data of AC_VI category corresponding to multimedia traffic in a multimedia service
  • a radio resource is reserved and transmitted using RTS / CTS control or the like.
  • Frame and one or more third data frames (e.g., data frames of the same AC_VI category as the first data frame) to which radio resources are to be reserved and transmitted using RTS / CTS control or the like.
  • the transmission order of the second data frames is adjusted to adjust the first data frame and the third data frame.
  • the second data frame is transmitted.
  • the overhead required for separately transmitting the first data frame and the third data frame by transmitting radio resources can be reduced and transmitted more efficiently.
  • the transmission of the second data frame may be delayed and the quality of the service using the second data frame may deteriorate.
  • the number of the third data frame may be limited to a predetermined reference value or less. Accordingly, the deterioration of the quality of the service using the second data frame can be suppressed by limiting the delay of the second data frame transmission to a predetermined reference value or less.
  • FIG. 11 illustrates a flowchart of a data frame transmission method based on radio resource reservation in a WLAN according to another embodiment of the present invention.
  • a data frame transmission method based on radio resource reservation in a WLAN is a method of transmitting a data frame by reserving radio resources in a WLAN.
  • the method may include transmitting and reserving radio resources (S220).
  • step S210 the sender 100 calculates identification information of the receiver 200 for a data frame to be transmitted.
  • the MAC address may be used as identification information of the receiver 200, but is not limited thereto, and may be used without particular limitation as long as the identification information may identify the receiver 200 with other receiving apparatuses.
  • step S220 when identification information of the receiver 200 for the data frame to be transmitted is included in a predetermined client list, radio resources are reserved by the RTS / CTS control and transmitted.
  • the client list is defined in addition to the RTS Threshold ⁇ predefined threshold items used for the RTS / CTS control. Accordingly, the identification information defined in the client list may be used to determine whether to reserve a radio resource using RTS / CTS control or the like when transmitting a data frame.
  • the client list is defined in addition to a frame size based RTS threshold according to the RTS / CTS standard, and a data frame corresponding to identification information included in the client list (for example, the RTS client).
  • Data frames having MAC addresses included in the list as receivers are transmitted by reserving radio resources using RTS / CTS control and the like, thereby ensuring quality of service (QoS) of multimedia services using the same.
  • QoS quality of service
  • the category list and the client list are further defined at the same time in a predefined threshold item such as the RTS threshold, such as RTS / CTS control for data frames corresponding to both the category list and the client list.
  • a predefined threshold item such as the RTS threshold, such as RTS / CTS control for data frames corresponding to both the category list and the client list.
  • RTS threshold such as RTS / CTS control for data frames corresponding to both the category list and the client list.
  • the radio resources are reserved and transmitted by using RTS / CTS control only for data frames of a specific category transmitted to a specific receiver 200, thereby reducing the influence on other data frames and specifying the specific receiver 200. It may have an advantage that quality of service (QoS) for a service can be guaranteed.
  • QoS quality of service
  • the receiver 200 may be included or included in the client list.
  • FIG. 12 illustrates a configuration diagram of a data frame transmission system 50 based on radio resource reservation in a wireless LAN using various senders and receivers according to an embodiment of the present invention.
  • a device for transmitting a wireless LAN signal such as an access point (AP)
  • AP access point
  • a wired / wireless wireless device including a wireless LAN module such as a smartphone, a tablet, a personal PC, a laptop, and the like.
  • Various devices capable of transmitting WLAN signals, such as terminals, may also be used as the sender 100.
  • the receiver 200 may also be a set-top box for an IPTV service or the like, or predetermined multimedia traffic such as a smart phone, a tablet, a personal PC, a laptop, or the like from the sender 100 through a wireless LAN such as Wi-Fi.
  • predetermined multimedia traffic such as a smart phone, a tablet, a personal PC, a laptop, or the like from the sender 100 through a wireless LAN such as Wi-Fi.
  • Various terminals used to receive predetermined data traffic and provide a predetermined service such as a multimedia service may be used.
  • a variety of terminals such as a smartphone that can transmit a wireless LAN signal such as Wi-Fi may be used, the smartphone 200 or the notebook as the receiver 200
  • Various terminals that may be used to receive predetermined data traffic from the sender 100 through a wireless LAN such as Wi-Fi and provide a predetermined service such as a multimedia service may be used.
  • the sender 100 simultaneously provides a plurality of receivers 200 including the first receiver 200a and the second receiver 200b according to an embodiment of the present invention.
  • RTS / CTS control may be used to reserve radio resources to transmit data frames.
  • the computer program according to another aspect of the present invention is characterized in that the computer program stored in a computer-readable recording medium for executing each step of the data traffic transmission method based on the above-described radio resource reservation in the computer.
  • the computer program may be a computer program including not only a computer program including machine code generated by a compiler, but also a high-level language code executable on a computer using an interpreter or the like.
  • the computer is not limited to a personal computer (PC) or a notebook computer, but is provided with a central processing unit (CPU) such as a server, a smart phone, a tablet PC, a PDA, a mobile phone, and any information processing capable of executing a computer program. Device.
  • PC personal computer
  • CPU central processing unit
  • the computer-readable medium may include an electronic recording medium (eg, ROM, flash memory, etc.), a magnetic storage medium (eg, floppy disk, hard disk, etc.), an optical reading medium (eg, CD-ROM, DVD, etc.) and any storage medium readable by a computer, such as carrier waves (eg, transmission over the Internet).
  • an electronic recording medium eg, ROM, flash memory, etc.
  • a magnetic storage medium eg, floppy disk, hard disk, etc.
  • an optical reading medium eg, CD-ROM, DVD, etc.
  • carrier waves eg, transmission over the Internet
  • the computer program according to another aspect of the present invention is a computer program that can be stored and executed in a recording medium, such as a memory, such as a smartphone for transmitting a data frame to the receiver 200 via a wireless LAN, such as Wi-Fi Can be.
  • a recording medium such as a memory
  • a wireless LAN such as Wi-Fi Can be.
  • the computer program according to another aspect of the present invention may be implemented as an app or the like and distributed or installed through a network.
  • FIG. 13 and 14 illustrate a configuration diagram of a data frame transmission apparatus based on radio resource reservation in a WLAN according to an embodiment of the present invention.
  • FIG. 13 illustrates a configuration diagram of a transmission device 100 for transmitting a data frame based on a radio resource reservation in a WLAN using a category of the data frame according to an embodiment of the present invention.
  • the apparatus 100 for transmitting data frames based on radio resource reservation in a WLAN includes a data frame category selection unit 110a and a data frame transmission order adjusting unit 120. And a data frame transmitter 130.
  • the apparatus for transmitting a data frame based on a radio resource reservation in a WLAN may refer to a description of a method for transmitting a data frame based on a reservation of a radio resource, as described below. Divide into parts and look briefly.
  • the data frame category selector 110a selects a category of a data frame to be transmitted.
  • categories including some or all of AC_BK, AC_BE, AC_VI, and AC_VO which are access categories according to the IEEE 802.11e standard, may be used.
  • the data frame transmission order adjusting unit 120 reserves and transmits one or more first data frames to be transmitted by reserving radio resources using RTS / CTS control and the like, and reserves and transmits radio resources using RTS / CTS control. If one or more second data frames to be transmitted are located between the third data frames without reserving a radio resource, the first data frame and the third data frame may be wirelessly controlled using one RTS / CTS control. After transmitting through resource reservation, the transmission order may be adjusted to transmit the second data frame. If necessary, the data frame transmission order adjusting unit 120 may be omitted.
  • the data frame transmitter 130 reserves a radio resource using RTS / CTS control and transmits the radio resource to the receiver 200.
  • the category list may be defined in addition to a predefined threshold item such as an RTS threshold based on a frame size according to the RTS / CTS standard. Accordingly, an access category included in the category list may be defined.
  • a data frame corresponding to a category (eg, AC_VI corresponding to multimedia traffic) is transmitted by applying RTS / CTS control, thereby ensuring quality of service (QoS) of multimedia services using the same.
  • FIG. 14 illustrates a configuration diagram of a transmission device 100 that transmits a data frame based on a radio resource reservation in a WLAN using identification information of the receiver 200 of the data frame according to an embodiment of the present invention.
  • the apparatus 100 for transmitting data frames based on radio resource reservation in a WLAN includes a receiver identification information calculating unit 110b and a data frame transmission order adjusting unit 120. And a data frame transmitter 130.
  • the apparatus for transmitting a data frame based on a radio resource reservation in a WLAN may refer to a description of a method for transmitting a data frame based on a reservation of a radio resource, as described below. Divide into parts and look briefly.
  • the receiver identification information calculating unit 110b calculates the identification information of the receiver for the data frame to be transmitted.
  • various identification information for identifying the receiver 200 with other receivers such as a MAC address, may be used as identification information of the receiver 200.
  • the data frame transmission order adjusting unit 120 may reserve one or more first data frames to reserve and transmit radio resources such as RTS / CTS control, and one or more third data to reserve and transmit radio resources such as RTS / CTS control. If one or more second data frames to be transmitted are located between the frames without reserving the radio resources, the first data frame and the third data frames are transmitted through radio resource reservation such as one RTS / CTS control. Then, the transmission order may be adjusted to transmit the second data frame. If necessary, the data frame transmission order adjusting unit 120 may be omitted.
  • the data frame transmitter 130 reserves and transmits a radio resource using RTS / CTS control. .
  • the client list may be defined in addition to a predefined threshold item such as an RTS threshold based on a frame size according to the RTS / CTS standard. Accordingly, the client list corresponds to a MAC address included in the client list.
  • the data frame transmitted to the receiver 200 is reserved for transmission of radio resources using RTS / CTS control and the like, thereby ensuring quality of service (QoS) of multimedia services using the same.

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

Abstract

La présente invention concerne un procédé et un appareil destinés à la transmission d'un trafic de données basé sur un réseau local sans fil, et un programme informatique et, plus particulièrement, un procédé et un appareil destinés à la transmission d'un trafic de données basé sur un réseau local sans fil (LAN), et un programme informatique, le procédé et l'appareil étant susceptibles de garantir une qualité de service (QoS) tel qu'un service multimédia et analogue(s) par l'utilisation plus efficace d'une ressource sans fil par l'intermédiaire d'une modification dans un canal primaire et la transmission d'une trame de données sur la base d'une réservation de ressource sans fil à l'aide de commandes RTS/CTS et analogue(s). La présente invention concerne un procédé destiné à la transmission de trafic de données basé sur un réseau local sans fil (LAN), consistant : à attribuer un canal destiné à attribuer une pluralité de canaux comprenant un canal primaire et un canal secondaire de façon à permettre à un point d'accès (AP) de réaliser une transmission et une réception de données avec une station (STA) ; et à modifier le canal primaire destiné à la transmission d'une trame RTS dans chacun de la pluralité de canaux à la STA et à modifier le canal primaire lorsqu'une trame CTS n'est pas reçue dans le canal primaire et/ou le canal secondaire.
PCT/KR2017/008662 2016-08-16 2017-08-10 Procédé et appareil destinés à la transmission d'un trafic de données basé sur un lan sans fil, et programme informatique WO2018034458A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0103777 2016-08-16
KR1020160103777A KR20180019804A (ko) 2016-08-16 2016-08-16 무선랜에서 무선자원 예약에 기반한 데이터 전송 방법, 장치 및 컴퓨터 프로그램
KR1020160104179A KR102167777B1 (ko) 2016-08-17 2016-08-17 무선랜 시스템에서의 동적 대역폭 변경 방법, 장치 및 컴퓨터 프로그램
KR10-2016-0104179 2016-08-17

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