WO2016204435A1

WO2016204435A1 - Channel bonding based signal transmission method and apparatus therefor

Info

Publication number: WO2016204435A1
Application number: PCT/KR2016/005843
Authority: WO
Inventors: 박성진; 김정기; 조한규; 김진민; 박은성; 조경태
Original assignee: 엘지전자 주식회사
Priority date: 2015-06-18
Filing date: 2016-06-02
Publication date: 2016-12-22

Abstract

The present specification relates to a method for transmitting, by a station (STA), a signal through channel bonding in a wireless LAN (WLAN) system, and an apparatus therefor. To this end, the station may transmit preamble information for a first type STA of a radio frame via two or more channels each having a first size of bandwidth, when sending the radio frame to other wireless stations; transmit a preamble for a second type STA of the radio frame through an interval frequency region corresponding to an interval between the two or more channels; and subsequently to the preamble for the first type STA and a header for the first type STA in a time domain, transmit a header for the second type STA and data for the second type STA of the radio frame through frequency domain channel bonding including the two or more channels and the interval frequency region.

Description

Channel bonding based signal transmission method and apparatus therefor

The following description relates to channel bonding in a mobile communication system, and more particularly, to a method and apparatus for transmitting a signal based on channel bonding in a station in a WLAN system.

The standard for WLAN technology is being developed as an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. IEEE 802.11a and b are described in 2.4. Using unlicensed band at GHz or 5 GHz, IEEE 802.11b provides a transmission rate of 11 Mbps and IEEE 802.11a provides a transmission rate of 54 Mbps. IEEE 802.11g applies orthogonal frequency-division multiplexing (OFDM) at 2.4 GHz to provide a transmission rate of 54 Mbps. IEEE 802.11n applies multiple input multiple output OFDM (MIMO-OFDM) to provide a transmission rate of 300 Mbps for four spatial streams. IEEE 802.11n supports channel bandwidths up to 40 MHz, in this case providing a transmission rate of 600 Mbps.

The WLAN standard uses a maximum of 160MHz bandwidth, supports eight spatial streams, and supports IEEE 802.11ax standard through an IEEE 802.11ac standard supporting a speed of up to 1Gbit / s.

Meanwhile, IEEE 802.11ad defines performance enhancement for ultra-high throughput in the 60 GHz band, and IEEE 802.11ay for channel bonding and MIMO technology is introduced for the first time in the IEEE 802.11ad system.

While data transmission based on channel bonding can provide high throughput, this may require a new Physical Protocol Data Unit (PPDU) format.

For the IEEE 802.11ay standardization as described above, a study on a new PPDU format considering a compatibility with an existing legacy system (eg, 11ad STA), and a method and apparatus for transmitting the same is required.

According to an aspect of the present invention for solving the above problems, in a method in which a first station (STA) transmits a signal through channel bonding in a WLAN system, the first STA is connected to a second STA. Transmitting a radio frame, wherein the first STA transmits preamble information for the first type STA of the radio frame through two or more channels each having a bandwidth of a first size, and at intervals between the two or more channels. Transmitting a preamble for the second type STA of the radio frame through a corresponding interval frequency region, and following the first type preamble for the first type STA and the header for the first type STA in the time domain, the two or more channels and A method of transmitting a signal by transmitting a header for a second type STA and data for a second type STA of the radio frame through channel bonding in a frequency domain including the interval frequency region. Not getting.

The preamble for the first type STA may include a legacy short training field (STF) for the legacy STA and legacy channel estimation (CE) for the legacy STA.

The preamble for the second type STA may include an interval frequency domain STF (GF-STF) and an interval frequency domain CE (GF-CE).

The header for the first type STA may include one or more of bandwidth information and channelization information used for channel bonding.

The bandwidth of the first size may be 1760 MHz, and the interval frequency region may have a size of 400 MHz. However, the size of the bandwidth may vary in the standardization process, and the present invention does not need to be limited to a specific value.

Meanwhile, according to another embodiment of the present invention, in a method in which a first station (STA) transmits a signal through channel bonding in a WLAN system, the first STA transmits a radio frame to a second STA. The first STA sequentially transmits preamble information for a first type STA, a header for a first type STA, and a header for a second type STA through two or more channels each having a bandwidth of a first size. And transmitting the preamble for the second type STA and the data for the second type STA through channel bonding of a frequency domain including an interval frequency region corresponding to the two or more channels and the interval between the two or more channels. We propose a signal transmission method.

The header for the first type STA may include information indicating whether the header for the second type STA includes independent information or repeats the same information in the two or more channels.

The bandwidth of the first size may be 1760 MHz, and the interval frequency region may have a size of 400 MHz, but is not limited thereto.

Meanwhile, in another aspect of the present invention, a station apparatus for transmitting a signal through channel bonding in a WLAN system includes: a preamble for a first type STA, a header for a first type STA, and a preamble for a second type STA A processor configured to generate a radio frame comprising an emblem, a header for a second type STA and a data field for a second type STA; And a transceiver coupled to the processor, the transceiver configured to transmit the radio frame to another station through a time and frequency domain, wherein the processor controls the transceiver, through two or more channels each having a first size bandwidth. Transmit the preamble information for the first type STA, transmit the preamble for the second type STA through an interval frequency region corresponding to the interval between the two or more channels, and for the first type STA in the time domain Following the preamble and the header for the first type STA, the header for the second type STA and the data for the second type STA are performed through channel bonding in the frequency domain including the two or more channels and the interval frequency region. A station apparatus, which is configured to transmit, is proposed.

In another embodiment of the present invention, in a station apparatus for transmitting a signal through channel bonding in a WLAN system, a preamble for a first type STA, a header for a first type STA, and a second type STA A processor configured to generate a radio frame comprising a preamble, a header for a second type STA, and a data field for a second type STA; And a transceiver coupled to the processor, the transceiver configured to transmit the radio frame to another station through a time and frequency domain, wherein the processor controls the transceiver, through two or more channels each having a first size bandwidth. An interval frequency corresponding to sequentially transmitting the preamble information for the first type STA, the header for the first type STA, and the header for the second type STA, and corresponding to the interval between the two or more channels and the two or more channels; The station apparatus is configured to transmit the preamble for the second type STA and the data for the second type STA through channel bonding in the frequency domain including the region.

According to the present invention, it is possible to provide a high throughput of channel combining while minimizing the delay thereof.

In addition, the present invention can flexibly respond to the situation of the medium for the IEEE 802.11ay standardization as described above.

1 is a diagram illustrating an example of a configuration of a WLAN system.

2 is a diagram illustrating another example of a configuration of a WLAN system.

3 is a diagram for describing a channel in a 60 GHz band for explaining a channel bonding operation according to an embodiment of the present invention.

4 is a diagram illustrating a basic method of performing channel bonding in a WLAN system.

5 is a diagram for explaining a physical configuration of an existing radio frame.

6 and 7 are views for explaining the configuration of the header field of the radio frame of FIG.

8 is a diagram illustrating a PPDU structure using gap filling according to a preferred embodiment of the present invention.

9 is a diagram illustrating a PPDU structure without using gap filling according to another embodiment of the present invention.

10 is a view for explaining an apparatus for implementing the method as described above.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are omitted or shown in block diagram form, centering on the core functions of each structure and device, in order to avoid obscuring the concepts of the present invention.

As described above, the following description relates to a method and apparatus for transmitting data based on channel bonding in a mobile communication system. There may be various mobile communication systems to which the present invention is applied. Hereinafter, the WLAN system will be described in detail as an example of the mobile communication system.

1 is a diagram illustrating an example of a configuration of a WLAN system.

As shown in FIG. 1, the WLAN system includes one or more basic service sets (BSSs). A BSS is a set of stations (STAs) that can successfully synchronize and communicate with each other.

An STA is a logical entity that includes a medium access control (MAC) and a physical layer interface to a wireless medium. The STA is an access point (AP) and a non-AP STA (Non-AP Station). Include. The portable terminal operated by the user among the STAs is a non-AP STA, and when referred to simply as an STA, it may also refer to a non-AP STA. A non-AP STA is a terminal, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile terminal, or a mobile subscriber. It may also be called another name such as a mobile subscriber unit.

The AP is an entity that provides an associated station (STA) coupled to the AP to access a distribution system (DS) through a wireless medium. The AP may be called a centralized controller, a base station (BS), a Node-B, a base transceiver system (BTS), or a site controller.

BSS can be divided into infrastructure BSS and Independent BSS (IBSS).

The BBS shown in FIG. 1 is an IBSS. The IBSS means a BSS that does not include an AP. Since the IBSS does not include an AP, access to the DS is not allowed, thereby forming a self-contained network.

The BSS shown in FIG. 2 is an infrastructure BSS. Infrastructure BSS includes one or more STAs and APs. In the infrastructure BSS, communication between non-AP STAs is performed via an AP. However, when a direct link is established between non-AP STAs, direct communication between non-AP STAs is also possible.

As shown in FIG. 2, a plurality of infrastructure BSSs may be interconnected through a DS. A plurality of BSSs connected through a DS is called an extended service set (ESS). STAs included in the ESS may communicate with each other, and a non-AP STA may move from one BSS to another BSS while seamlessly communicating within the same ESS.

The DS is a mechanism for connecting a plurality of APs. The DS is not necessarily a network, and there is no limitation on the form if it can provide a predetermined distribution service. For example, the DS may be a wireless network such as a mesh network or a physical structure that connects APs to each other.

Based on the above, the channel bonding method in the WLAN system will be described.

As shown in FIG. 3, four channels may be configured in the 60 GHz band, and a general channel bandwidth may be 2.16 GHz. The ISM bands available from 60 GHz (57 GHz to 66 GHz) may be defined differently in different countries. In general, channel 2 of the channels shown in FIG. 3 may be used in all regions and may be used as a default channel.

Channels

2 and 3 can be used in most of the designations except Australia, which can be used for channel bonding. However, a channel used for channel bonding may vary, and the present invention is not limited to a specific channel.

The example of FIG. 4 illustrates the operation of 40 MHz channel bonding by combining two 20 MHz channels in an IEEE 802.11n system. For IEEE 802.11ac systems, 40/80/160 MHz channel bonding will be possible.

The two exemplary channels of FIG. 4 include a primary channel and a secondary channel, so that the STA can examine the channel state in a CSMA / CA manner for the primary channel of the two channels. If the secondary channel is idle for a predetermined time (e.g. PIFS) at the time when the primary channel idles for a constant backoff interval and the backoff count becomes zero, the STA is assigned to the primary channel and Auxiliary channels can be combined to transmit data.

However, when channel bonding is performed based on contention as illustrated in FIG. 4, channel bonding may be performed only when the auxiliary channel is idle for a predetermined time at the time when the backoff count for the primary channel expires. Therefore, the use of channel bonding is very limited, and it is difficult to flexibly respond to the media situation.

Hereinafter, the physical layer configuration in the WLAN system to which the present invention is applied will be described in detail.

In the WLAN system according to an embodiment of the present invention, it is assumed that three different modulation modes may be provided.

PHYPHY	MCSMCS	anmerkunganmerkung
Control PHYControl PHY	00
Single carrier PHY (SC PHY)Single carrier PHY (SC PHY)	1...1225...311 ... 1225 ... 31	(low power SC PHY)(low power SC PHY)
OFDM PHYOFDM PHY	13...2413 ... 24

Such modulation modes can be used to meet different requirements (eg, high throughput or stability). Depending on your system, only some of these modes may be supported.

It is assumed that all DMG (Directional Multi-Gigabit) physical layers commonly include fields as shown in FIG. 5. However, there may be a difference in the method of defining individual fields and the modulation / coding method used according to each mode.

As shown in FIG. 5, the preamble of the radio frame may include a Short Training Field (STF) and a Channel Estimation (CE). In addition, the radio frame may include a header and a data field as a payload and optionally a TRN field for beamforming.

6 illustrates a case in which the SC mode is used. In the SC mode, a header indicates information indicating an initial value of scrambling, an MCS, information indicating a length of data, information indicating whether an additional PPDU is present, and a packet type. It may include information such as training length, aggregation, beam beaming request, last RSSI, truncation, and header check sequence (HCS). Also, as shown in FIG. 6, the header has 4 bits of reserved bits, and the following bits may be used in the following description.

7 shows a specific configuration of an OFDM header. The OFDM header includes information indicating the initial value of scrambling, MCS, information indicating the length of data, information indicating the presence or absence of additional PPDUs, packet type, training length, aggregation, beam beaming request, last RSSI, truncation, Information such as a header check sequence (HCS) may be included. In addition, as shown in FIG. 7, the header has 2 bits of reserved bits, and in the following description, such reserved bits may be utilized as in the case of FIG. 6.

As described above, the IEEE 802.11ay system is considering channel bonding and MIMO technology for the first time in the existing 11ad system. To implement channel bonding and MIMO in 11ay, a new PPDU structure is needed. That is, the existing 11ad PPDU structure has limitations in supporting legacy terminals and implementing channel bonding and MIMO.

To this end, a new field for a 11ay terminal may be defined behind a legacy preamble and a legacy header field to support the legacy terminal. Here, channel bonding and MIMO may be supported through the newly defined field.

In a preferred embodiment of the present invention, it is proposed to inform the bandwidth used for channel bonding through a legacy header field. This allows the ay header to contain more information bits since the new ay-header can be transmitted in bonded form.

8 illustrates a PPDU structure according to one preferred embodiment of the present invention. In FIG. 8, the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.

When two or more channels are bonded, a 400 MHz band may exist between frequency bands (1760 MHz) used in each channel. In the mixed mode, legacy preambles (legacy STFs, legacy CEs) are transmitted as duplicates through each channel. In an embodiment of the present invention, a new STF and CE are simultaneously transmitted together with the legacy preambles through a 400 MHz band between each channel. Consider gap filling.

That is, when transmitting the preambles (STF and CE) for the legacy STA through two channels having 1760 MHz, as shown in Figure 8, the GF-preamble (STF and Propose to send CE).

When the new STF and CE fields are transmitted through the 400 MHz band, the AGC, synchronization, and channel estimation for the entire frequency band used for bonding together with the legacy preamble can be performed at once. Therefore, new STF and CE fields for bonded payload transmission in 11ay do not need to exist after the legacy preamble section.

FIG. 8 illustrates a case where two channels are bonded to each other, but the present invention may be equally applied to bonding three or more channels.

In order to transmit data in the PPDU format as shown in FIG. 8, reserved bits (OFDM PHY: 2 bits, SC PHY: 4 bits) of the legacy header field may be modified to inform bandwidth used for channel bonding. Therefore, the ay header and ay Payload transmitted after the legacy header field may be transmitted through channels (2.16 + 2.16 GHz in FIG. 8) used for bonding.

As described above, since there are four channels (each 2.16 GHz) in 11ay, ay header and ay payload can be transmitted through 2.16 GHz, 4.32 GHz, 6.48 GHz, and 8.64 GHz bandwidth according to the bandwidth indicated by the legacy header field. have.

In the case of the 11ad SC PHY, the reserved bits of the legacy header field are 4 bits in total, and in the case of the 11ad OFDM PHY, 2 bits are present. Therefore, a method of informing bandwidth and channelization used for channel bonding by modifying reserved bits as shown in the following tables is proposed. This description assumes that channel bonding is a contiguous coupling between channels, but need not be limited thereto.

필드 명칭Field name	비트 수Number of bits	설명Explanation
BW (대역폭)BW (Bandwidth)	22	0: 2.16GHz (single channel)1: 4.32GHz (2channel bonding)2: 6.48GHz (3channel bonding)3: 8.64GHz (4channel bonding)0: 2.16 GHz (single channel) 1: 4.32 GHz (2 channel bonding) 2: 6.48 GHz (3 channel bonding) 3: 8.64 GHz (4 channel bonding)

필드 명칭Field name	비트 수Number of bits	설명Explanation
BW (대역폭)BW (Bandwidth)	33	0: single channel1: 2channel bonding (ch1, ch2)2: 2channel bonding (ch2, ch3)3: 2channel bonding (ch3, ch4)4: 3channel bonding (ch1, ch2, ch3)5: 3channel bonding (ch2, ch3, ch4)6: 4channel bonding (ch1, ch2, ch3, ch4)7: reserved0: single channel 1: 2 channel bonding (ch1, ch2) 2: 2 channel bonding (ch2, ch3) 3: 2 channel bonding (ch3, ch4) 4: 3 channel bonding (ch1, ch2, ch3) 5: 3 channel bonding (ch2, ch3, ch4) 6: 4channel bonding (ch1, ch2, ch3, ch4) 7: reserved

If each terminal knows the primary channels and the channel bonding procedure is determined, like 11n / ac channel bonding method (primary / secondary channel bonding), channel bonding can be performed even if the bandwidth is only 2 bits in the legacy header as shown in Table 2. Can be.

Meanwhile, in order to apply the channel bonding procedure of 11ay only without applying the channel bonding procedure of 11n / ac, a new channelization represented by 3 bits as shown in Table 3 is preferable.

After channel bonding, the modulation method of the ay header transmitted in wide band is possible for both SC and OFDM. Legacy headers can carry 64 bits of information. If the number of bonded channels is increased to 2, 3, or 4 in the same manner, the ay header may carry 128 bits, 192 bits, and 256 bits of information in proportion to the bandwidth of the bonded channels. Alternatively, the information may be fixed to 128 bits in the ay header and the remaining bits may be used for padding with data or for increasing repetition.

Meanwhile, the PPDU format may also be considered when repetitively transmitting legacy preambles without performing the gap-filling as described above.

9 illustrates a PPDU structure according to another embodiment of the present invention. In FIG. 9, the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.

Referring to FIG. 9, the PPDU of FIG. 9 has a form of transmitting ay STF and ay CE over the legacy preamble, the legacy header, and the ay header over a wide band without performing gap-filling. In this embodiment, when channel bonding is performed, the reserved bits (OFDM PHY: 2 bits and SC PHY: 4 bits) of the legacy headers are modified to consider that ay headers are not duplicated and transmitted, but may also transmit different data. .

The PPDU format when signaling for channel bonding through the legacy header is shown in FIG. 9. 9 is a PPDU format when two-channel bonding is performed and can be expanded to three-channel and four-channel bonding.

In order to transmit data in the PPDU format as shown in FIG. 9, it is preferable to sense a frequency band used for channel bonding in Rx. The legacy preamble is received through each channel used for channel bonding, and AGC, synchronization, and channel estimation are separately performed. Therefore, different information can be sent to the ay header (a) and the ay header (b).

Modulation of the ay header is possible for both SC PHY and OFDM PHY. In case of SC PHY, x2, x3, x4 times the chip rate based on the number of channels used for channel bonding, and can transmit and receive in wide band.In the case of OFDM PHY, the sampling rate and FFT size of the channel used for channel bonding It can transmit / receive wide band by x2, x3, x4 times in proportion to the number. In the OFDM PHY, it is preferable to insert and transmit a null value in a subcarrier matching a 400 MHz band between channels.

Signaling indicating whether to send the ay header as a duplicate or different information can be reported in 1bits through the legacy header as shown in Table 4.

필드 명칭Field name	비트 수Number of bits	설명Explanation
DuplicateDuplicate	1One	0: duplicate transmission for ay Header1: non duplicate transmission from ay Header0: duplicate transmission for ay Header

Since 11ay has a total of four channels (each 2.16 GHz), the ay header can be transmitted through one channel, two channels, three channels, and four channels according to the bandwidth or channelization indicated by the legacy header field.

In the case of the 11ad SC PHY, the reserved bits of the legacy header field are 4 bits in total, and in the case of the 11ad OFDM PHY, 2 bits are present. Therefore, the reserved bits can be modified as shown in Table 2 and Table 3 to inform the bandwidth and channelization used for channel bonding.

If each terminal knows the primary channels and the channel bonding procedure is determined as in 11n / ac channel bonding method (primary / secondary channel bonding), channel bonding is performed even if the bandwidth is only 2 bits in the legacy header as shown in Table 2 above. can do.

Meanwhile, in order to apply the channel bonding procedure of 11ay only without applying the channel bonding procedure of 11n / ac, a new channelization represented by 3 bits is preferable as shown in Table 3 above.

The wireless device 800 of FIG. 10 may correspond to a specific STA of the above description, and the wireless device 850 may correspond to the PCP / AP of the above description.

The STA 800 may include a processor 810, a memory 820, and a transceiver 830, and the PCP / AP 850 may include a processor 860, a memory 870, and a transceiver 880. can do. The transceiver 830 and 880 may transmit / receive a radio signal and may be executed in a physical layer such as IEEE 802.11 / 3GPP. The processors 810 and 860 are executed at the physical layer and / or MAC layer, and are connected to the transceivers 830 and 880. Processors 810 and 860 may perform the aforementioned UL MU scheduling procedure.

Processors 810 and 860 and / or transceivers 830 and 880 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits and / or data processors. The memories 820 and 870 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media and / or other storage units. When an embodiment is executed by software, the method described above can be executed as a module (eg, process, function) that performs the functions described above. The module may be stored in the memory 820, 870 and executed by the processors 810, 860. The memories 820 and 870 may be disposed inside or outside the processes 810 and 860 and may be connected to the processes 810 and 860 by well-known means.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable any person skilled in the art to make and practice the invention. Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed from the above description. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

As described above, the present invention has been described assuming that it is applied to an IEEE 802.11-based WLAN system, but the present invention is not limited thereto. The present invention can be applied in the same manner to various wireless systems capable of data transmission based on channel bonding.

Claims

A method for transmitting a signal through channel bonding by a first station (STA) in a WLAN system,

The first STA transmits a radio frame to the second STA,

The first STA,

Transmit preamble information for the first type STA of the radio frame through two or more channels each having a bandwidth of a first size,

Transmitting a preamble for the second type STA of the radio frame through an interval frequency region corresponding to the interval between the two or more channels,

The second type STA of the radio frame through channel bonding in the frequency domain including the two or more channels and the interval frequency region, following the preamble for the first type STA and the header for the first type STA in the time domain. A signal transmission method for transmitting the header for the second type of data and the STA.
The method of claim 1,

The preamble for the first type STA includes a legacy short training field (STF) for legacy STA and legacy channel estimation (CE) for legacy STA.
The method of claim 1,

The preamble for the second type STA includes an interval frequency domain STF (GF-STF) and an interval frequency domain CE (GF-CE).
The method of claim 1,

The header for the first type STA includes one or more of bandwidth information and channelization information used for channel bonding.
The method of claim 1,

The bandwidth of the first size is 1760 MHz,

And the interval frequency region has a size of 400 MHz.
A method for transmitting a signal through channel bonding by a first station (STA) in a WLAN system,

The first STA transmits a radio frame to the second STA,

The first STA,

Sequentially transmitting the preamble information for the first type STA, the header for the first type STA, and the header for the second type STA through the two or more channels each having a bandwidth of the first size,

Signal transmission for transmitting the preamble for the second type STA and the data for the second type STA through channel bonding of a frequency domain including an interval frequency region corresponding to the two or more channels and the interval between the two or more channels. Way.
The method of claim 6,

The preamble for the first type STA includes a legacy short training field (STF) for legacy STA and legacy channel estimation (CE) for legacy STA.
The method of claim 6,

The header for the first type STA includes information indicating whether the header for the second type STA includes independent information or repeats the same information in the two or more channels.
The method of claim 6,

The header for the first type STA includes one or more of bandwidth information and channelization information used for channel bonding.
The method of claim 6,

The bandwidth of the first size is 1760 MHz,

And the interval frequency region has a size of 400 MHz.
A station apparatus for transmitting a signal through channel bonding in a WLAN system,

A processor configured to generate a radio frame including a preamble for a first type STA, a header for a first type STA, a preamble for a second type STA, a header for a second type STA, and a data field for a second type STA; And

A transceiver coupled to the processor and configured to transmit the radio frame to another station over a time and frequency domain,

The processor controls the transceiver,

Transmit the preamble information for the first type STA through two or more channels each having a bandwidth of a first size,

Transmitting the preamble for the second type STA through an interval frequency region corresponding to the interval between the two or more channels,

Subsequent to the first type STA preamble and the first type STA header in the time domain, the header for the second type STA through channel bonding in a frequency domain including the two or more channels and the interval frequency domain And transmit data for the second type STA.
A station apparatus for transmitting a signal through channel bonding in a WLAN system,

A processor configured to generate a radio frame including a preamble for a first type STA, a header for a first type STA, a preamble for a second type STA, a header for a second type STA, and a data field for a second type STA; And

A transceiver coupled to the processor and configured to transmit the radio frame to another station over a time and frequency domain,

The processor controls the transceiver,

Sequentially transmitting the preamble information for the first type STA, the header for the first type STA, and the header for the second type STA through two or more channels each having a bandwidth of a first size,

Configured to transmit the preamble for the second type STA and the data for the second type STA through channel bonding in a frequency domain including an interval frequency region corresponding to the two or more channels and the interval between the two or more channels. Station device.