KR101995578B1 - Method for wireless communication - Google Patents

Abstract

A wireless communication method is provided. According to one or more exemplary embodiments, a wireless communication method performed by a first wireless communication device includes: generating a superframe including channel time allocation (CTA) information; And transmitting the generated superframe to a second wireless communication device, wherein the channel time allocation information includes a stream index used to determine whether or not to be a bidirectional CTA. can do.

Description

Wireless communication method {METHOD FOR WIRELESS COMMUNICATION}

The description below relates to a wireless communication method.

IEEE 802.15.3, an international standard for wireless personal area networks (PANs), has defined piconet, a communication network composed of piconet coordinators and devices around piconet coordinator (PNC). . Communication within the piconet is intended to occur within a number of superframe structures when viewed on the time base.

The existing piconet was constructed assuming a communication in a piconet composed of a piconet coordinator and a plurality of devices, and the existing channel approach defined a channel access procedure among multiple devices. In the case of an application having a point-to-point (P2P) configuration such as super-proximity communication and requiring bi-directional data transmission, another third-party device does not participate in communication and may be configured by only connecting the piconet coordinator to the device one-to-one.

According to an embodiment of the present invention, a piconet having a P2P configuration aims to define and configure a new CTA and channel access procedure in order to increase transmission efficiency and reduce latency for channel access.

According to one embodiment, an object of the present invention is to provide a configuration of a bidirectional CTA.

According to one or more embodiments, a wireless communication method performed by a first wireless communication device may include: generating a superframe including channel time allocation (CTA) information capable of transmitting a frame; And transmitting the generated superframe to a second wireless communication device, wherein the channel time allocation information includes a stream index used to determine whether or not to be a bidirectional CTA. can do.

According to an embodiment, the channel time allocation information may be information on a CTA interval or a CTA interval, and the CTA interval may include bidirectional channel time allocation.

According to an embodiment, the first wireless communication device may be a piconet coordinator (PNC), and the second wireless device may be a device other than a piconet coordinator (PNC).

According to an embodiment, the first wireless communication device may be an initiator, and the second wireless device may be a responder.

According to an embodiment, when the initiator has a mixed bidirectional traffic such as a wireless memory, the role of the initiator may be determined by a request of an application generating data.

According to an embodiment, the second wireless communication device transmits information about a joining request to the first wireless communication device, and the first wireless communication device sends information about a joining response to the second wireless communication device. Can transmit

According to an embodiment, the first wireless communication device plays an initiator role, the second wireless communication device plays a role of a responder, and the first wireless communication device responds to a detach request to the second wireless communication device. Information can be sent.

According to an embodiment of the present disclosure, the first wireless communication device and the second wireless communication device determine which mode to operate while performing a scanning procedure with each other, and then determine an initiator or responder role after the connection procedure. Can be.

According to one embodiment, in applications where the role of the initiator is not clear, the role of the initiator / responder may be switched in the middle of the data phase.

According to an embodiment, by using the channel time allocation transfer (CTA relinquish) function, the initiator sends a data frame and changes the channel time allocation transfer (CTA relinquish) or the CTA role in the header part (CTA role). change) information can be set to 1 and transmitted. If the responder sends an immediate ack and the initiator receives a normal frame during the CTA relinquish timeout, it may be determined that the role of the initiator / responder has changed.

According to an embodiment, in a piconet having a P2P configuration, it is possible to provide a bidirectional CTA capable of increasing transmission efficiency and reducing delay time in channel access.

According to one embodiment, there is an effect that can provide a way to configure the initiator / responder and the bidirectional CTA.

1 illustrates a structure of a defined superframe according to an embodiment of a wireless communication method.
2 illustrates an example in which a superframe is configured when a P2P configuration is defined in a piconet defined according to an embodiment of the wireless communication method.
3 illustrates a case where a piconet coordinator and a non-PNC device according to an embodiment of the wireless communication method are designated.
4 illustrates a case where a device other than a piconet coordinator is not designated initially according to an embodiment of the wireless communication method.
5 illustrates a Bidirectional CTA Information Element according to an embodiment of a wireless communication method.
6 illustrates the operation of a defined implied-Ack according to an embodiment of a wireless communication method.
7 illustrates a priority based channel access procedure according to an embodiment of the wireless communication method.
FIG. 8 illustrates a channel access procedure of a responder in a priority based channel access method according to an embodiment of the wireless communication method.
9 illustrates a retransmission procedure of an initiator according to an embodiment of a wireless communication method.
10 illustrates a responder retransmission procedure according to an embodiment of a wireless communication method.

Specific structural or functional descriptions of the embodiments are disclosed for purposes of illustration only, and may be practiced in various forms. Accordingly, the embodiments are not limited to the specific disclosure, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical idea.

Terms such as first or second may be used to describe various components, but such terms should be interpreted only for the purpose of distinguishing one component from another component. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be a direct connection or connection to that other component, but there may be other components in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, but includes one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same components will be given the same reference numerals regardless of the reference numerals, and duplicate description thereof will be omitted.

1 illustrates a structure of a defined superframe according to an embodiment of a wireless communication method.

First, referring to FIG. 1, one superframe starts with a beacon and includes one contention access period (CAP) and channel time allocation period (CTAP). Able to know.

According to an embodiment, the channel time allocation interval may be composed of a plurality of channel time allocation (CTA) blocks managed and allocated by the piconet coordinator. In the competitive access section, the channel access method is used by using the CSMA / CA (Carrier Sense Multiple Access / Collision Avoiding) protocol. The channel time allocation is performed according to the time division multiple access (TDMA), Either CSMA / CA or slotted Aloha can be used.

In the TDMA channel time allocation period, the CTA transmit control function is assigned to a specific device by the piconet coordinator, and the device to which the transmission control function is assigned is assigned at any time during the channel time allocation period allocated by the piconet coordinator. You can access and use the channel. There is also the ability to transfer the remaining time of channel time allocation to another device using the channel time allocation transfer (CTA relinquish) function, but procedural time loss may exist. In addition, since channel time allocation is allocated to transmit a uni-directional stream such as media, other devices cannot access the channel other than the response in the corresponding interval.

Channel time allocation using CSMA / CA or slotted Aloha methods includes Association CTA, Association MCTA (Management CTA), Open CTA, and Open MCTA, which allow multiple devices to access the channel and send frames through contention. It is possible to have a lower transmission efficiency than CTAP using a TDMA scheme that uses a channel exclusively.

Each piconet coordinator and device can be assigned a TDMA CTA or a CTA using a competitive channel approach such as CSMA / CA or slotted Aloha. In case of assigning a separate CTA of TDMA method, only one allocated side can access the channel, so when the other party wants to send data, wait until the one to whom the CTA is allocated sends data and then send a response. While the implied-ack (Imp-Ack) method of transmitting data can be used, it may cause a problem of waiting because the one who has been assigned the CTA does not know when to send the data.

In applications where performance varies depending on the round trip delay between two devices, performance degradation may occur. Competitive channel approaches may not be able to complete a transfer within a limited time because of the reduced efficiency of the channel approach itself, which can lead to longer transfer times in applications where all data must be transferred within seconds.

2 illustrates an example in which a superframe is configured when a P2P configuration is defined in a piconet defined according to an embodiment of the wireless communication method.

Referring to FIG. 2, when a piconet defined in 802.15.3 has a P2P configuration, it is defined as a P2P piconet and the configuration of a superframe can be known. The superframe may be divided into a beacon, a competitive access interval (CAP), and a channel time allocation interval (CTAP). The channel time allocation interval may be specified as duration or infinite duration and may exist until the connection is terminated in the disconnection phase.

According to an embodiment, the first wireless communication device may generate a superframe including channel time allocation (CTA) information and transmit the generated superframe to the second wireless communication device. Here, the channel time allocation information may include a stream index used to determine whether the bidirectional channel time (Bidirectional CTA).

According to an embodiment, the channel time allocation interval may consist of one bidirectional CTA. When the connection phase ends, a beacon is transmitted when the data phase starts, and an infinite CTA may be defined through the CTA information element (IE) of the second beacon.

According to an embodiment, the CTA using the conventional TDMA scheme is defined only as a unidirectional stream, but the bidirectional CTA is defined so that the piconet coordinator and the device participating in the P2P can access the channel. A bidirectional CTA is assigned to two entities, each of which can access a channel, and can be defined as an initiator and a responder, respectively.

According to one embodiment, the initiator may have one or more of the following functions and may be given a high priority in channel access. For example, the initiator may be a device that transmits a beacon or a device that mainly serves as a data source. In addition, the initiator may be a device that mainly serves to initiate a frame sequence in the case of bidirectional traffic.

According to one embodiment, the responder may have one or more of the following functions and may be given a low priority in channel access. For example, the responder may be a device for transmitting an association request or a device mainly serving as a data sink. In addition, the responder may be a device that transmits data in response to a frame sequence in case of bidirectional traffic.

According to an embodiment, a process of negotiating and determining an initiator / responder role between two entities may be performed in the connecting step. A device with a lot of data to send in the upper application layer may request the role of an initiator. For example, when data is delivered from a kiosk to a terminal, such as a kiosk, the kiosk acting as an initiator can reduce the overall data transmission time.

According to an embodiment, when bidirectional traffic is mixed, such as wireless memory, the role of an initiator may be determined by a request of an application generating data. In an application, if the flow of data is indeterminate, a device operating in piconet coordinator mode may act as an initiator.

3 illustrates a case where a piconet coordinator and a non-PNC device according to an embodiment of the wireless communication method are designated.

Referring to Figure 3, it can be seen that the process of determining the initiator, the responder between the two entities in the connection step. For example, it may be a connection procedure when the role of the piconet coordinator is determined, such as a kiosk.

According to one embodiment, in step 301, the PNC, the first wireless communication device 310, may transmit a beacon to a non-PNC device, the second wireless communication device 320. The second wireless communication device 320 may transmit information about the association request to the first wireless communication device 310. The first wireless communication device 310 may transmit information about the association response to the second wireless communication device 320.

According to one embodiment, in step 302, the first wireless communication device 310 may act as an initiator and the second wireless communication device 320 may act as a responder. The first wireless communication device 310 may transmit information about the separation request to the second wireless communication device 320.

4 illustrates a case where a device other than a piconet coordinator is not designated initially according to an embodiment of the wireless communication method.

Referring to Figure 4, it can be seen that the process of determining the initiator, the responder between the two entities in the connection step. After the two devices determine which mode to operate while scanning with each other, the initiator / responder can be determined after the connection procedure.

According to an embodiment, in step 401, DEV (device) 1, which is the first wireless communication device 410, may transmit a beacon to DEV 2, which is the second wireless communication device 420. The second wireless communication device 420 can transmit information about the association request to the first wireless communication device 410. The first wireless communication device 410 may transmit information regarding the association response to the second wireless communication device 420.

According to one embodiment, in step 402, the first wireless communication device 410 may act as an initiator, and the second wireless communication device 420 may act as a responder. The first wireless communication device 410 may transmit information about the separation request to the second wireless communication device 420.

According to an embodiment, in an application in which the role of the initiator is not clear, the function of replacing the role of the initiator / responder in the middle of the data phase may be performed as follows. Using the CTA relinquish function defined in 802.15.3b, the initiator sends a data frame and sends the channel time allocation transfer or CTA role change information to the header part. Can be set to 1 to send. If the responder sends an immediate ack and the initiator receives a normal frame during the CTA relinquish timeout, the role of the initiator / responder may be considered changed.

According to one embodiment, when the responder sends an immediate ack, the initiator does not wait for a timeout and assumes that the role of the initiator / responder has changed, and the Responder InterFrame spacing (RPIFS) from the next channel access. Channel access can be performed by

According to an embodiment, the role of the initiator / responder in the P2P piconet is determined, and the piconet coordinator may generate bidirectional CTA information and notify the counterpart device. The P2P piconet is assigned two initiator / responder devices to one bidirectional CTA and can support bi-directional streams.

5 illustrates a Bidirectional CTA Information Element according to an embodiment of a wireless communication method.

Referring to FIG. 5, the bidirectional CTA information transmitted may be known. The CTA information element 510 is composed of two CTA blocks 521 and 522, and each CTA block 520 has a CTA duration, a CTA location, and a stream index. ), A source ID (SrcID), and a destination ID (DestID).

According to an embodiment, in a piconet, a bidirectional stream may consist of two uni-directional streams. In the case of the bidirectional stream, a stream index may be allocated for each data source. Stream indexes using an initiator device as a source and stream indexes using a responder device as a source may be allocated.

According to an embodiment, when the CTA duration has a value of 0, the CTA duration is designated as infinite duration, and the CTA location is position information of the time base calculated from the start of the super frame. Can be. In the case of assigning two CTAs, the CTA duration and location of each CTA information may have the same value and may have overlapping information on the time axis.

According to an embodiment, the stream index may be assigned by the piconet coordinator. For each stream index, modulo-512 is allocated as a sequence number of a MAC service data unit (MSDU) and may be used for data transmission and reception. In 802.15.3, a channel access method can be determined by the stream index, SrcID, and DestID. In a P2P piconet, a separate stream index can be allocated for bidirectional CTA. For example, 0xF9 may be allocated as an initiator stream index of a P2P piconet. In addition, 0xFA may be allocated as a responder stream index of the P2P piconet.

According to an embodiment, a bidirectional CTA (Bidirectional CTA) may be allocated as shown in Table 1 below indicating bidirectional CTA information using another stream index. For example, the first device DEV1 is a bidirectional CTA because its ID assigned from the piconet coordinator is in the SrcID field and the stream index has a value of 0xF9. As an initiator, the first device DEV1 can access a channel using the stream index 0xF9 as an initiator. . The second device DEV2 is a bidirectional CTA because the ID assigned from the piconet coordinator is in the SrcID field and the stream index has a value of 0xFA, and the channel can be accessed as a responder.

CTA type SrcID DestID Stream index Channel Access method Bidirectional CTA-Initiator DEV1 DEV2 0xF9 High Priority Channel access Bidirectional CTA-Responder DEV2 DEV1 0xFA Low Priority Channel access

According to an embodiment, as shown in Table 2 below, which indicates bidirectional CTA information using the same stream index, two CTAs are notified that they are bidirectional CTAs using the same stream index, and the initiator / response designated in the connection setup procedure is specified. Channel access may be performed in the CTA period using the information. For example, the bidirectional stream index may be 0xFA.

CTA type SrcID DestID Stream index Channel Access method Bidirectional CTA DEV1 DEV2 0xFA Priority-based Channel access Bidirectional CTA DEV2 DEV1 0xFA Priority-based Channel access

According to an embodiment, in the case of a unidirectional stream oriented such as an application for downloading information from a kiosk, the kiosk device is assigned a bidirectional stream index or a regular stream index, and an initiator. You can assign roles. The terminal device may operate only as an implied-ack without allocating a CTA and a stream index, and a method using an asynchronous stream index may be used. When the regular stream index is allocated, a TDMA channel access protocol defined in 802.15.3 may be used.

According to one embodiment, a method of wireless communication may initiate frame transmission at any time on both sides using a bidirectional CTA. The wireless communication method may use the implied ack to continue bidirectional flow when transmission is started once and data is still present. The initiator may be implemented such that the responder transmits data using implied-ack and bidirectional CTA by periodically polling using null data to see if there is data to be sent by the responder.

6 illustrates the operation of a defined implied-Ack according to an embodiment of a wireless communication method.

Referring to FIG. 6, it can be seen that the implied-Ack setting process and operation defined in 802.15.3b are performed in the data phase of the P2P piconet. Initiator 610 becomes a source device and responder 620 becomes a target device, allowing implied ack (Imp Ack) from initiator 610 to responder 620 to transmit bidirectional data. You can make this possible.

According to an embodiment, even when the initiator 610 becomes a target device in the opposite direction and the responder 620 becomes a source device and the responder 620 accesses a channel to start a frame sequence, it is bidirectional through implied-ack. It may also be possible to transmit a data stream.

According to an embodiment, in the bidirectional CTA period, both the initiator 610 and the responder 620 can access the channel, and when the implied ack is used, the bidirectional stream transmission that transmits data can also be performed by the response.

According to an embodiment, the InterFrame spacing (IFS) parameter for channel access defined in 802.15.3 is as follows. SIFS can be used between frames and in frames and immediate Ack. BIFS is used in a competitive access interval and may be defined as an interval in which a channel is idle before performing a backoff algorithm in CSMA / CA. RIFS is used for retransmission in the CTA section and may be used when Immediate-Ack or delayed ack is not received during the Ack timeout.

(6.5

(default))일 수 있다.According to an embodiment, in the case of a single carrier PHY of 802.15.3c, it may have a value as shown in Table 3 below. Slot time is SIFS + 4

(6.5

(default)).

InterFrame spacing (IFS) Parameter value MIFS

, 0.5

(default), 2.0

0.2

, 0.5

(default), 2.0

SIFS 0.2

, 2.0

, 2.5

(default) BIFS SIFS + CCA (4

) (6.5

(default)) RIFS 2 * SIFS + CCA (4

) (9

(default))

According to an embodiment, the priority-based channel access protocol used in the bidirectional CTA section may operate by the following procedure. Initiator IFS (IIFS) is a time that initiator 610 waits in an idle state before transmitting a frame and may be equal to a Short Interframe Space (SIFS) value. Responder IFS (RPIFS) is a time the responder 620 waits in an idle state before transmitting a frame and may have a SIFS + Clear Channel Assessment (CCA) value. The IIFS is set to have a value shorter than that of the RPIFS, and when the initiator 610 transmits a frame, the responder 620 may be in a standby state.

7 illustrates a priority based channel access procedure according to an embodiment of the wireless communication method.

Referring to FIG. 7, the channel access procedure of the initiator may be known among the priority-based channel access methods.

According to one embodiment, initiator 710 may begin sending a new frame after waiting for IIFS before starting a new frame sequence. When there is data to be sent to the initiator 710, the responder 720 may start a new frame sequence at SIFS intervals regardless of the arrival time of the data.

FIG. 8 illustrates a channel access procedure of a responder in a priority based channel access method according to an embodiment of the wireless communication method.

Referring to FIG. 8, among priority-based channel access schemes, the responder 820 may begin transmitting data after confirming that the channel is idle for an RPIFS longer than IIFS.

According to an embodiment, when the initiator 810 starts to send data, the responder 820 may wait until the frame sequence is terminated, confirm that the channel is idle by RPIFS, and start a new frame sequence.

9 illustrates a retransmission procedure of an initiator according to an embodiment of a wireless communication method.

Referring to FIG. 9, the retransmission procedure when the initiator 910 does not receive Immediate Ack (Imm-Ack) can be seen.

According to an embodiment, when the responder 910 does not normally receive a frame sent by the initiator 910, the responder 920 may wait for an Ack timeout and start a frame sequence for transmitting data after the RPIFS.

10 illustrates a responder retransmission procedure according to an embodiment of a wireless communication method.

Referring to FIG. 10, when the responder 1020 does not receive an immediate ack (Imm-Ack), a procedure of retransmission may be seen.

According to an embodiment, since the initiator 1010 did not normally receive the frame sent by the responder 1020, the initiator 1010 may start a frame sequence for transmitting data after IIFS after waiting for the Ack timeout. In this case, since the initiator 1010 has a higher priority than the responder 1020, the initiator 1010 may occupy a channel. The responder 1020 may wait until a new frame sequence starts or perform bidirectional transmission using Implied-Ack.

The embodiments described above may be implemented as hardware components, software components, and / or combinations of hardware components and software components. For example, the devices, methods, and components described in the embodiments may include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable gates (FPGAs). It may be implemented using one or more general purpose or special purpose computers, such as an array, a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of explanation, one processing device may be described as being used, but one of ordinary skill in the art will appreciate that the processing device includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as parallel processors.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and configure the processing device to operate as desired, or process it independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. Or may be permanently or temporarily embodied in a signal wave to be transmitted. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. Software and data may be stored on one or more computer readable recording media.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. Computer-readable media may include, alone or in combination with the program instructions, data files, data structures, and the like. Program instructions recorded on the computer readable medium may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with reference to the accompanying drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Claims (10)

In the wireless communication method performed by the first wireless communication device,
Generating a beacon for a superframe including channel time allocation (CTA) information;
Transmitting the generated beacons to a second wireless communication device;
Receiving information regarding a join request from the second wireless communication device; And
When receiving the information about the association request, transmitting the information about the association response to the second wireless communication device,
When the association response is sent, a connection is established between the first wireless communication device and the second wireless communication device, and data is transferred between the first wireless communication device and the second wireless communication device based on the established connection. Can be exchanged,
The CTA interval for the second wireless communication device is not specified in duration or specified in infinite length,
Wireless communication method.
delete The method of claim 1,
The first wireless communication device is a piconet coordinator (PNC),
The second wireless communication device is a device other than a piconet coordinator (PNC),
Wireless communication method.
The method of claim 1,
The first wireless communication device is an initiator,
The second wireless communication device is a responder;
Wireless communication method.
The method of claim 4, wherein
When the initiator has a mixed bidirectional traffic, the role of the initiator is determined by a request of an application generating data.
Wireless communication method.
The method of claim 1,
Sending a disconnect request to the second wireless communication device
More,
If the detach request is sent to the second wireless communication device, the connection is terminated;
Wireless communication method.
The method of claim 1,
The first wireless communication device,
Scanning the second wireless communication device to determine which mode to operate in,
Perform a connection procedure with the second wireless communication device,
Determining the role of the first wireless communication device among an initiator or a responder,
Wireless communication method.
The method of claim 7, wherein
The first wireless communication device,
In applications where the role of the initiator is not clear, in the middle of the data phase, the roles of the initiator and the responder are replaced.
Wireless communication method.
The method of claim 8,
When the first wireless communication device is an initiator, channel time allocation assignment (CTA relinquish) or CTA role change (CTA) in a header portion of a data frame using a channel time allocation assignment (CTA relinquish) function. role change) information is set to 1 to transmit the data frame to the responder,
When the first wireless communication device receives an immediate ack transmitted by the responder during a channel time allocation transfer timeout (CTA relinquish timeout), determining that the roles of an initiator and a responder have changed;
Wireless communication method.
The wireless communication device performing wireless communication with the target wireless communication device,
Generating a beacon for a superframe including channel time allocation (CTA) information, transmitting the generated beacon to the target wireless communication device, and transmitting a beacon for the association request from the target wireless communication device. Receive the information, and when receiving the information about the association request, transmit the information about the association response to the target wireless communication device,
When the association response is transmitted, a connection may be established between the wireless communication device and the target wireless communication device, and data may be exchanged between the wireless communication device and the target wireless communication device based on the established connection,
The CTA interval for the target wireless communication device is not specified in duration or specified in infinite length,
Wireless communication device.

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