KR101512731B1 - Communication apparatus and method, and access point employing the same - Google Patents

Communication apparatus and method, and access point employing the same Download PDF

Info

Publication number
KR101512731B1
KR101512731B1 KR1020140139975A KR20140139975A KR101512731B1 KR 101512731 B1 KR101512731 B1 KR 101512731B1 KR 1020140139975 A KR1020140139975 A KR 1020140139975A KR 20140139975 A KR20140139975 A KR 20140139975A KR 101512731 B1 KR101512731 B1 KR 101512731B1
Authority
KR
South Korea
Prior art keywords
data frame
data
data packet
size
frame
Prior art date
Application number
KR1020140139975A
Other languages
Korean (ko)
Inventor
김재석
정철호
정태욱
강병철
Original Assignee
연세대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 연세대학교 산학협력단 filed Critical 연세대학교 산학협력단
Priority to KR1020140139975A priority Critical patent/KR101512731B1/en
Application granted granted Critical
Publication of KR101512731B1 publication Critical patent/KR101512731B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Abstract

The present invention relates to a communications device, a method of the same, and an access point using the same. According to an embodiment of the present invention, the communications device includes: a storage part to store a data frame; a control part to generate a data packet with a predetermined size by adding additional data for transmission to the data frame; and a communications part to transmit the data packet to a receiving end through a communications medium. The control part classifies the data frame under one access category among a plurality of access categories, and enables the data frame to be transmitted by using an enhanced distributed channel access (EDCA) method which transmits the data frame based on an order of priority assigned to each access category. In order to transmit data frames under different access categories at the same time during a single transmission opportunity (TXOP), the control part enables the access categories to share the TXOP, wherein a plurality of data frames can be included in a single data packet transmitted during the TXOP.

Description

[0001] COMMUNICATION APPARATUS AND METHOD, AND ACCESS POINT EMPLOYING THE SAME [0002]

The present invention relates to a communication apparatus and method, and an access point using the same.

The present invention is the result of a research project on the task number 1415107372, "Gbps high speed ultra low power wireless communication SoC research for high resolution image information collection ".

The recently revised IEEE 802.11ac aims to increase the throughput of multiple users and single users to 1 Gbps and 500 Mbps, respectively, in the bands below 6 GHz. To achieve this goal, downlink multi-user multi-input multi-output (DL MU-MIMO) schemes are being introduced into the standard.

When a DL MU-MIMO scheme is used together with a DL MU-MIMO scheme, a frame aggregation technique of aggregating a plurality of frames into one single frame is performed because a plurality of stations share an available bandwidth. It is possible to transmit a plurality of frames to a plurality of stations through spatial streams.

In this case, the AP transmits an A-MPDU (Medium Access Control Protocol Data Unit), which is a set of MPDUs (Medium Access Control (MAC) Protocol Data Unit) to be transmitted to each station during a Transmission Opportunity (TXOP) Aggregated MPDU). The A-MPDU is generated in a predetermined size, and the size of the A-MPDU is included in the A-MPDU and remains constant regardless of the size of the data frame transmitted to the station.

Therefore, when the size of the data frame included in the A-MPDU is smaller than the predetermined payload size of the A-MPDU, the remaining part of the payload of the A-MPDU is filled with null data and transmitted to the station. However, such a method using null data has a problem of causing waste of media resources.

Embodiments of the present invention aim to provide a communication apparatus and method for preventing media resources from being wasted due to transmission of null data, and an access point using the same.

An embodiment of the present invention aims to provide a communication apparatus and method for increasing the throughput of equipment by including another data frame in place of filling null data in the remaining part of the payload, and an access point using the same.

A communication apparatus according to an embodiment of the present invention includes a storage unit for storing a data frame; A control unit for generating a data packet having a predetermined size by adding additional data for transmission to the data frame; And a communication unit for transmitting the data packet to a receiving end through a communication medium, wherein the control unit classifies the data frame into one of a plurality of access categories and transmits the data frame according to a priority assigned to each access category To transmit the data frames in an Enhanced Distributed Channel Access (EDCA) scheme to transmit data frames belonging to different access categories together during a Transmission Opportunity (TXOP) May include a plurality of data frames in a single data packet transmitted during the transmission opportunity.

The communication unit may include: a wireless communication module for wirelessly transmitting the data packet to the receiving terminal.

The wireless communication module may include a plurality of antennas to transmit the data packet.

The communication unit may: simultaneously transmit the data packet during the transmission opportunity to a plurality of different receiving ends.

Wherein the controller is configured to: if the size of the first data frame to be included in the first data packet is smaller than the payload size of the first data packet, 2 < / RTI > data frames.

Wherein the controller calculates a difference between a payload size of the first data packet and a size of the first data frame and divides the second data frame into a first fragment data frame and a second fragment data frame, The size of the one-piece data frame corresponds to the difference, the first piece of data frame in the second data frame is placed in a higher byte than the second piece of data frame, the remaining part of the payload of the first data packet May include the first piece of data frame.

Wherein the controller is configured to: configure the first data packet with the first data frame and the first fragment data frame, and include the second fragment data frame with the second data packet transmitted after the first data packet have.

The control unit may further include a third data frame different from the second data frame in a remaining portion of the payload of the second data packet when the size of the second fragment data frame is smaller than the payload size of the second data packet Can be included.

Wherein the controller calculates a difference between a payload size of the second data packet and a size of the second fragment data frame and divides the third data frame into a third fragment data frame and a fourth fragment data frame, The size of the third piece of data frame corresponds to the difference between the payload size of the second data packet and the size of the second piece of data frame, and in the third data frame, Frame, and the third piece of data frame may be included in a remaining portion of the payload of the second data packet.

The control unit may include the first data frame in the payload of the first data packet so that the first piece of data frame and the second piece of data frame are sequentially transmitted, , The second fragment data frame is included in the payload of the second data packet, and the third fragment data frame is included.

Wherein the controller is configured to classify the remaining part of the payload of the first data packet into an access category to which the first data frame belongs if the size of the first data frame is smaller than the payload size of the first data packet And a data frame to be transmitted after the first data frame among the data frames.

Wherein the communication device is configured to: transmit the data packet to the receiving end and receive an acknowledgment response message for the transmitted data packet from the receiving end, wherein the acknowledgment response message includes a plurality of data frames And a second bit indicating whether the other of the plurality of data frames is normally received or not.

A communication method according to an embodiment of the present invention is an enhanced distributed channel access (EDCA) scheme in which a data frame is classified into one of a plurality of access categories and the data frame is transmitted according to a priority assigned to each access category Wherein the plurality of access categories share the transmission opportunity to transmit the data frames together and transmit data frames belonging to different access categories together during one transmission opportunity (TXOP), the control method comprising: Loading a frame; Generating a data packet having a predetermined size by adding the additional data for transmission to the data frame, wherein the control unit includes a plurality of data frames in a single data packet transmitted during the transmission opportunity; And a step in which the communication unit transmits the data packet to the receiving end via the communication medium.

The transmitting step may include: the wireless communication module wirelessly transmitting the data packet to the receiving end.

The wirelessly transmitting may include: the wireless communication module transmitting the data packet using a plurality of antennas.

The transmitting step may include simultaneously transmitting the data packet during the transmission opportunity to a plurality of different receiving ends.

Wherein the generating of the data packet comprises: if the size of the first data frame to be included in the first data packet is smaller than the payload size of the first data packet, And including a second data frame different from the data frame.

Wherein the step of including the second data frame in a remaining portion of the payload of the first data packet comprises: calculating a difference between a payload size of the first data packet and a size of the first data frame; Dividing the second data frame into a first piece of data frame and a second piece of data frame, the size of the first piece of data frame corresponding to the difference, and in the second data frame, A second data frame dividing step of being arranged in a higher byte than the second fragment data frame; And including the first fragment data frame in a remaining portion of the payload of the first data packet.

Wherein generating the data packet comprises: constructing the first data packet with the first data frame and the first fragment data frame and then transmitting the second fragment data to a second data packet transmitted after the first data packet, And including a frame.

Wherein the step of including the second fragment data frame in the second data packet comprises: if the size of the second fragment data frame is smaller than the payload size of the second data packet, And including a third data frame different from the second data frame.

Wherein the step of including the third data frame in a remaining portion of the payload of the second data packet comprises: calculating a difference between a payload size of the second data packet and a size of the second fragment data frame; The third data frame is divided into a third fragment data frame and a fourth fragment data frame, the size of the third fragment data frame being a difference between a payload size of the second data packet and a size of the second fragment data frame Wherein the third piece of data frame in the third data frame is arranged in a higher byte than the fourth piece of data frame; And including the third piece of data frame in a remaining portion of the payload of the second data packet.

Wherein generating the data packet comprises: including the first data frame in a payload of the first data packet such that the first and second pieces of data frame are sequentially transmitted, And may include the third piece of data frame after including the second piece of data frame in the payload of the second data packet.

Wherein the step of generating the data packet comprises: if the size of the first data frame is smaller than the payload size of the first data packet, the remaining part of the payload of the first data packet, And including a data frame to be transmitted after the first data frame among the data frames classified into the access category.

The communication method may further comprise: after the data packet is transmitted to the receiving end, the communication unit receives a reception acknowledgment message for the transmitted data packet from the receiving end, A first bit indicating whether one of the plurality of data frames in the data packet is normally received and a second bit indicating whether the other one of the plurality of data frames is normally received.

An access point according to an embodiment of the present invention includes: a storage unit for storing a data frame; A control unit for generating a data packet having a predetermined size by adding additional data for transmission to the data frame; And a communication unit for transmitting the data packet to a station via a communication medium, wherein the control unit is configured to classify the data frame into one of a plurality of access categories, and to transmit the data frame according to a priority assigned to each access category Wherein the plurality of access categories control the transmission of the data frame in an Enhanced Distributed Channel Access (EDCA) scheme to transmit data frames belonging to different access categories together for a transmission opportunity (TXOP) And may include a plurality of data frames in a single data packet transmitted during the transmission opportunity.

The communication method according to the embodiment of the present invention may be implemented as a program that can be executed by a computer, and may be recorded in a computer-readable recording medium.

A communication method according to an embodiment of the present invention may be implemented as a computer program stored in a medium for execution in combination with the computer.

According to the embodiment of the present invention, media resources can be prevented from being wasted due to transmission of null data.

According to an embodiment of the present invention, the throughput of communication equipment can be increased.

1 is a schematic diagram illustrating transmission of data from an access point to a plurality of stations in accordance with an embodiment of the present invention.
2 is an exemplary block diagram of a communication device in accordance with an embodiment of the present invention.
3 is an exemplary diagram of a traffic queue provided per access category in accordance with one embodiment of the present invention.
4 is an exemplary diagram showing a state before another data frame is included in a remaining portion of a payload of a data packet according to an embodiment of the present invention.
5 is an exemplary diagram illustrating a portion of another data frame in a remaining portion of a payload of a data packet according to an embodiment of the present invention.
6 is an exemplary diagram illustrating a structure of an acknowledgment response message according to an embodiment of the present invention.
7 is an exemplary flow diagram of a communication method in accordance with an embodiment of the present invention.
8 is an exemplary flowchart illustrating a process of generating a data packet according to an embodiment of the present invention.
9 is an exemplary flowchart illustrating a process of generating a data packet according to another embodiment of the present invention.

Other advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Unless defined otherwise, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. Terms defined by generic dictionaries may be interpreted to have the same meaning as in the related art and / or in the text of this application, and may be conceptualized or overly formalized, even if not expressly defined herein I will not.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms' comprise 'and / or various forms of use of the verb include, for example,' including, '' including, '' including, '' including, Steps, operations, and / or elements do not preclude the presence or addition of one or more other compositions, components, components, steps, operations, and / or components. The term 'and / or' as used herein refers to each of the listed configurations or various combinations thereof.

It should be noted that the terms such as '~', '~ period', '~ block', 'module', etc. used in the entire specification may mean a unit for processing at least one function or operation. For example, a hardware component, such as a software, FPGA, or ASIC. However, '~ part', '~ period', '~ block', '~ module' are not meant to be limited to software or hardware. Modules may be configured to be addressable storage media and may be configured to play one or more processors. ≪ RTI ID = 0.0 >

Thus, by way of example, the terms 'to', 'to', 'to block', 'to module' refer to components such as software components, object oriented software components, class components and task components Microcode, circuitry, data, databases, data structures, tables, arrays, and the like, as well as components, Variables. The functions provided in the components and in the sections ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' , '~', '~', '~', '~', And '~' modules with additional components.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

FIG. 1 is a schematic diagram illustrating transmission of data from an access point 100 to a plurality of stations 200 according to an embodiment of the present invention.

As shown in FIG. 1, according to an embodiment of the present invention, the access point 100 may transmit data to the plurality of stations 200 wirelessly. The access point 100 may include a plurality of antennas to transmit the data to the plurality of stations 200 in a multiplex manner.

Although not shown in FIG. 1, each of the stations is provided with two or more antennas, so that the access point 100 and the station can configure a multi-input multi-output (MIMO) communication system.

According to an embodiment of the present invention, the access point 100 may transmit the data to a plurality of different stations 200 at the same time. That is, the access point 100 transmits the first data frame to the first station STA-1 at time T1 and then transmits the second data frame to the second station STA-2 at time T2 Alternatively, it is possible to simultaneously transmit data to a plurality of stations 200 at time T1, but to transmit different data frames to each station.

Hereinafter, a communication apparatus and a method according to an embodiment of the present invention, which can reduce waste of media resources and increase throughput of equipment, will be described. A communication apparatus and method according to an embodiment of the present invention may be applied to an access point, but the present invention is not limited thereto and may be introduced to various wired and wireless communication apparatuses including the station according to an embodiment.

2 is an exemplary block diagram of a communication device 100 in accordance with an embodiment of the present invention.

2, the communication device 100 may include a storage unit 110, a control unit 120, and a communication unit 130. [ The storage unit 110 may store a data frame. The control unit 120 may generate a data packet having a predetermined size by adding additional data for transmission to the data frame. The communication unit 130 may transmit the data packet to a receiving end via a communication medium.

The storage unit 110 may be a storage unit for storing data frames to be transmitted to the receiver. For example, the storage unit 110 may include a high-speed data storage device such as a register. However, And the like.

The control unit 120 may include a medium access controller, for example, to call the data frame from the storage unit 110 to generate a data packet to be transmitted to the receiving end. But may include any circuit module capable of performing the operations and functions of the MAC layer without limitation.

The communication unit 130 receives a data packet generated by the controller 120 and transmits the data packet to the receiving end through a communication medium. For example, in the case of wireless communication, the communication unit 130 includes an antenna, a modulation circuit, And may include a wireless communication module capable of transmitting an electrical signal through a wireless channel. However, the wireless communication module may include any hardware capable of performing operations and functions of the PHY layer.

According to an embodiment of the present invention, the communication device 100 classifies the data frame into one of a plurality of access categories (AC), and transmits the data (Enhanced Distributed Channel Access (EDCA) scheme that transmits frames.

In this case, the access categories are composed of Voice, Video, Best Effort and Background, and each access category can have different user priorities. In addition, each access category has a queue for each category separately, and the setting such as the transmission opportunity limit (TXOP limit) may be different for each queue.

3 is an exemplary diagram of a traffic queue provided per access category in accordance with one embodiment of the present invention.

In Fig. 3, AC-VO is an access category corresponding to a voice, AC_VI is an access category corresponding to an image, AC_BE is an access category corresponding to a best effort, and AC_BK is an access category corresponding to a background.

As shown in FIG. 3, each access category has a queue individually, and data frames are sequentially output to the control unit 120 according to the input order.

According to an embodiment of the present invention, the communication device 100 may transmit data frames belonging to different access categories together for one transmission opportunity. In other words, the communication device 100 does not transmit only the data frames belonging to the primary access category during one transmission opportunity, but only the data frames belonging to the secondary access categories Multiple access categories share transmission opportunities so that data frames can also be transmitted together during the transmission opportunity.

According to an embodiment of the present invention, the controller 120 may include a plurality of data frames in a single data packet transmitted during the transmission opportunity. That is, according to the embodiment of the present invention, a plurality of different data packets may be included in one data packet transmitted during the transmission opportunity.

FIG. 4 is an exemplary diagram illustrating a state before another data frame is included in a remaining portion of a payload of a data packet according to an embodiment of the present invention. And a portion of another data frame is included in the remaining portion of the payload.

Referring to FIG. 4, as described above, the communication device 100 can simultaneously transmit data to a plurality of receiving terminals 200 during one transmission opportunity (TXOP). Accordingly, the communication apparatus 100 collects data frames to be transmitted to respective receiving ends to generate a single data packet DP1, DP2, and transmits the data packets DP1, DP2 during the transmission opportunity, And transmits the data frame to the receiving terminals 200.

According to one embodiment, the data packets DP1 and DP2 may be generated with a predetermined size. For example, the data packets DP1 and DP2 may be composed of a 4-byte delimiter and a payload of a predetermined number of bytes. The sizes of the data packets DP1 and DP2 can be kept constant regardless of the size of a data frame included in the payload.

The control unit 120 sequentially stores the data frames classified into one of the plurality of access categories AC_VO, AC_VI, AC_BE, and AC_BK into the data packets DP1 and DP2 in order according to the priority assigned to the corresponding access category To be transmitted during the transmission opportunity. The control unit 120 may add additional data for transmission to the data frame, for example, a preamble, and may transmit the preamble to the communication unit 130 and transmit the preamble to the receiving unit 200.

Hereinafter, an embodiment of the present invention will be described with reference to a portion transmitted to the second station STA-2 among data packets DP1 and DP2 transmitted to the first to third stations STA-1 to STA-3. .

According to the embodiment of the present invention, when the size of the first data frame to be included in the first data packet is smaller than the payload size of the first data packet, May include a second data frame different from the first data frame.

4, if the size of the first data frame DF1 included in the first data packet DP1 is smaller than the payload size of the first data packet DP1, the controller 120 May include a second data frame different from the first data frame DF1 in a remaining portion R1 of the payload of the first data packet DP1.

5, the controller 120 calculates a difference between a payload size of the first data packet DP1 and a size of the first data frame DF1, Frame is divided into a first fragment data frame DF1 'and a second fragment data frame DF2' and a remaining fragment R1 of the payload of the first data packet DP1 is divided into a first fragment data frame DF1 ' DF1 ').

In this case, the size of the first piece data frame DF1 'corresponds to the calculated difference. In addition, in the second data frame, the first fragment data frame DF1 'is arranged in a higher byte than the second fragment data frame DF2'. In other words, in the second data frame before division, the first fragment data frame DF1 'is the upper fragment data frame located in the upper byte, and the second fragment data frame DF2' is located in the lower byte Sub-fragment data frame.

5, the controller 120 may transmit the first data packet DF1 and the first data packet DF2 'to the first data frame DF1 and the first data packet DF1', respectively, according to an embodiment of the present invention. The second piece of data frame DP2 may be included in the second data packet DP2 transmitted after the first data packet DP1.

In this case, when the size of the second fragment data frame DF2 'is smaller than the payload size of the second data packet DP2, the controller 120 determines that the payload of the second data packet DP2 And a third data frame DF3 different from the second data frame may be included in the remaining portion.

Specifically, the controller 120 calculates the difference between the payload size of the second data packet DP2 and the size of the second fragment data frame DF2 ', and outputs the third data frame DF3 A third fragment data frame and a fourth fragment data frame, and the third fragment data frame may be included in a remaining portion of the payload of the second data packet DP2.

In this case, the size of the third fragment data frame corresponds to the difference between the payload size of the second data packet DP2 and the size of the second fragment data frame DF2 '. In the third data frame, the third fragment data frame is an upper fragment data frame arranged in a higher byte than the fourth fragment data frame.

5, the size of the third data frame DF3 is equal to the size of the remaining portion of the payload of the second data packet DP2, so that the third data frame DF3 is divided into two pieces And is included in the second data packet DP2 without being divided into data frames.

According to an embodiment of the present invention, as shown in FIG. 5, the control unit 120 may be configured to sequentially transmit the first piece data frame DF1 'and the second piece data frame DF2' The first data packet DF1 'is included in the payload of the first data packet DP1 and the first data packet DF1' is included in the payload of the second data packet DP2, It may include the third data frame DF3 or the third piece data frame after including the second piece data frame DF2 '.

In other words, in the first data packet DP1 in which the first data frame DF1 is included in the upper byte, another payload of the payload of the first data packet DP1, When dividing two data frames, the upper fragment data frame DF1 'corresponding to the higher byte among the fragmented fragment data frames DF1' and DF2 'is divided into the remaining part of the payload of the first data packet DP1 And the lower fragment data frame DF2 'corresponding to the lower byte may be included in the upper byte of the second data packet DP2 transmitted after the first data packet DP1.

As a result, even if the second data frame is divided into two fragment data frames DF1 'and DF2' and transmitted to the receiver by different data packets DP1 and DP2, the receiver receives the upper fragment data frame DF1 ') and the sub-fragment data frame DF2' sequentially.

According to an embodiment of the present invention, when the size of the first data frame DF1 is smaller than the payload size of the first data packet DP1, the controller 120 transmits the first data packet DP1, The data frame to be transmitted after the first data frame DF1 among the data frames classified into the access category to which the first data frame belongs may be included in the remaining portion R1 of the payload of the first data frame DF1.

In other words, another data frame included in the remaining portion R1 of the payload of the first data packet DP1 is accessed by the same access as the first data frame DF1 included in the first data packet DP1 May be a subordinate data frame belonging to the category.

For example, referring to FIG. 3 and FIG. 5, a priority data frame AC_BE (1) belonging to an access category of best effort (AC_BE) is added to a payload of a first data packet (DP1) (DF1), another data frame included in the remaining part (R1) of the payload of the first data packet (DP1) is included in the rearranged data frame belonging to the access category of the best effort (AC_BE) (AC_BE (3)).

In FIG. 3, the queue for the access category of the best effort AC_BE stores a total of three data frames, of which data frames to be transmitted to the second station STA-2 include a first data frame AC_BE ( (AC_BE (3)) and the third data frame (AC_BE (3)), another data frame included in the remaining portion (R1) of the payload of the first data packet (DP1) (AC_BE (3)) belonging to the same access category as the data frame (AC_BE

Furthermore, the communication device 100 may transmit a data packet to a receiving end and then receive an acknowledgment (ACK) message for the transmitted data packet from the receiving end.

In this case, according to the embodiment of the present invention, the acknowledgment message for the transmitted single data packet may be composed of 2 bits. Specifically, the acknowledgment response message includes a first bit indicating whether one of the plurality of data frames in the single data packet is normally received, and a second bit indicating whether the other one of the plurality of data frames is normally received, Bit < / RTI >

6 is an exemplary diagram illustrating a structure of an acknowledgment response message according to an embodiment of the present invention.

Referring to FIG. 6, acknowledgment messages for data packets may be included in the block ack bitmap portion of the acknowledgment frame. The acknowledgment messages A1 to An for each data packet are composed of two bits b1 and b2, of which the first bit b1 corresponds to a plurality of data frames DF1 in the single data packet DP1 And DF1 ', and the second bit b2 indicates whether or not the other DF1' of the plurality of data frames is normally received.

As described above, according to the embodiment of the present invention, since a plurality of data frames are included in one data packet and transmitted to the receiving end, the acknowledgment response message received from the receiving end also corresponds to the number of data frames included in the data packet Bits. ≪ / RTI >

7 is an exemplary flow diagram of a communication method 300 in accordance with one embodiment of the present invention.

The communication method 300 may be performed by the communication device 100 according to the above-described embodiment of the present invention.

According to an embodiment of the present invention, the communication method 300 comprises the steps of classifying a data frame into one of a plurality of access categories and transmitting the data frame in accordance with the priority assigned to each access category, ) Scheme, but the multiple access categories may share the transmission opportunity to transmit data frames belonging to different access categories together for a single transmission opportunity (TXOP).

7, the communication method 300 may include a step S310 of causing the control unit 120 to fetch a data frame from the storage unit 110, a step S310 of transmitting the data frame to the control unit 120, A data packet generation step (S320) of generating a data packet having a predetermined size by adding additional data (e.g., a preamble) for the transmission opportunity, and including a plurality of data frames in a single data packet transmitted during the transmission opportunity; 130) transmitting the data packet to the receiving end 200 through a communication medium (S330).

The transmitting step S330 may include a step in which the wireless communication module wirelessly transmits the data packet to the receiving terminal 200. However, the transmission of the data packet may be performed not only wirelessly but also wirelessly.

The step of wirelessly transmitting may include the step of the wireless communication module transmitting the data packet using a plurality of antennas, but the wireless communication module may include only one antenna.

The transmitting step S330 may include simultaneously transmitting the data packet to the plurality of different receiving terminals 200 during the transmission opportunity. However, the transmission of the data packet may be performed at different times for each receiving terminal It is possible.

According to an embodiment of the present invention, the step of generating the data packet S320 may include the step of determining whether the size of the first data frame DF1 to be included in the first data packet DP1 is smaller than the size of the payload The step of including a second data frame different from the first data frame DF1 in the remaining portion R1 of the payload of the first data packet DP1 may be included.

8 is an exemplary flowchart illustrating a process of generating a data packet according to an embodiment of the present invention.

8, the step of including the second data frame in the remaining portion R1 of the payload of the first data packet DP1 may include receiving the first data packet DP1 (S321) calculating a difference between a payload size of the first data frame DF1 and a size of the first data frame DF1, , The size of the first piece of data frame DF1 'corresponds to the difference, and the first piece of data frame DF1' in the second data frame corresponds to the second piece of data frame DF2 ' (S322), and the first piece of data frame (DF1 ') is included in the remaining portion (R1) of the payload of the first data packet (DP1) Step S323.

According to an embodiment of the present invention, the step of generating the data packet (S320) may include the step of forming the first data packet (DP1) by using the first data frame (DF1) and the first fragment data frame (DF1 ' , And including the second fragment data frame (DF2 ') in a second data packet (DP2) transmitted after the first data packet (DP1).

The step of including the second fragment data frame DF2 'in the second data packet DP2 may further include the step of determining whether the size of the second fragment data frame DF2' , A step of including a third data frame DF3 different from the second data frame in a remaining portion of the payload of the second data packet DP2 may be included.

9 is an exemplary flowchart illustrating a process of generating a data packet according to another embodiment of the present invention.

Referring to FIG. 9, the step of including the third data frame in the remaining part of the payload of the second data packet DP2 may include: comparing a payload size of the second data packet DP2, (S324) calculating a difference between sizes of the frame DF2 ', dividing the third data frame into a third piece data frame and a fourth piece data frame, The third piece of data frame corresponds to a difference between a payload size of the data packet DP2 and a size of the second piece data frame DF2 ' , A third data frame segmentation step (S325) in which the third piece of data frame is placed in the remaining part of the payload of the second data packet (DP2) It may include a system (S326).

According to an embodiment of the present invention, the step of generating the data packet (S320) may include a step of generating the data packet by sequentially transmitting the first fragment data frame DF1 'and the second fragment data frame DF2' The first data frame DF1 'is included in the payload of the data packet DP1 and then the first data packet DF1' is included in the payload of the second data packet DP2, It is possible to include the fragment data frame DF2 'and then to include the third fragment data frame.

According to an embodiment of the present invention, when the size of the first data frame DF1 is smaller than the payload size of the first data packet DP1 (S320) 1 of the data frames classified into the access category to which the first data frame DF1 belongs to the remaining part R1 of the payload of the first data frame DP1, The method comprising the steps of:

However, the data frame included in the remaining portion R1 of the payload of the first data packet DP1 is not limited to the data frame belonging to the same access category as the first data frame DF1, The data frame to be transmitted next to the first data frame DF1 may be selected regardless of the access category.

According to an embodiment, the communication method 300 may further include a step in which the communication unit 130 receives a reception acknowledgment message for the transmitted data packet from the receiving end after transmitting the data packet to the receiving end .

In this case, the acknowledgment response message includes a first bit b1 indicating whether one of the plurality of data frames DF1 and DF1 'in the transmitted single data packet DP1 is normally received, And a second bit b2 indicating whether the other one of the plurality of data frames DF1 and DF1 'is normally received.

The communication method 300 may be stored in a computer-readable recording medium that is manufactured as a program for execution on a computer. The computer-readable recording medium includes all kinds of storage devices in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. The communication method 300 may also be embodied in a computer program stored on a medium for execution in association with the computer.

According to the embodiment of the present invention described above, instead of filling the remaining portion of the payload with null data in order to maintain the size of the data packet, a part or all of another data frame is included, thereby reducing waste of media resources, Can be increased.

While the present invention has been described with reference to the exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will appreciate that various modifications may be made to the embodiments described above. The scope of the present invention is defined only by the interpretation of the appended claims.

100: communication device
110:
120:
130:
200: Receiver
DP1: first data packet
DP2: second data packet
DF1: first data frame
DF1 ': first piece data frame
DF2 ': second piece data frame
DF3: third data frame

Claims (27)

A storage unit for storing a data frame;
A control unit for generating a data packet having a predetermined size by adding additional data for transmission to the data frame; And
And a communication unit for transmitting the data packet to a receiving end via a communication medium,
The control unit includes:
And transmitting the data frame in an Enhanced Distributed Channel Access (EDCA) scheme in which the data frame is classified into one of a plurality of access categories and the data frame is transmitted according to a priority assigned to each access category Control,
To control the plurality of access categories to share the transmission opportunity to transmit data frames belonging to different access categories together during a Transmission Opportunity (TXOP)
Wherein the plurality of data frames are included in a single data packet transmitted during the transmission opportunity. The method according to claim 1,
Wherein the communication unit comprises:
And a wireless communication module for wirelessly transmitting the data packet to the receiving end. 3. The method of claim 2,
Wherein the wireless communication module includes a plurality of antennas to transmit the data packet. The method according to claim 1,
Wherein the communication unit comprises:
And simultaneously transmits the data packet during the transmission opportunity to a plurality of different receiving ends. The method according to claim 1,
The control unit includes:
When a size of a first data frame to be included in a first data packet is smaller than a payload size of the first data packet, a second data frame different from the first data frame is allocated to a remaining part of the payload of the first data packet Communication device. 6. The method of claim 5,
The control unit includes:
Calculating a difference between a payload size of the first data packet and a size of the first data frame,
Dividing the second data frame into a first piece of data frame and a second piece of data frame, the size of the first piece of data frame corresponding to the difference, and in the second data frame, Is placed in a higher byte than the second piece data frame,
And wherein the first fragmented data frame is included in a remaining portion of the payload of the first data packet. The method according to claim 6,
The control unit includes:
Constructing the first data packet with the first data frame and the first fragment data frame and including the second fragment data frame with a second data packet transmitted after the first data packet. 8. The method of claim 7,
The control unit includes:
And a third data frame different from the second data frame in a remaining portion of the payload of the second data packet when the size of the second fragment data frame is smaller than the payload size of the second data packet. . 9. The method of claim 8,
The control unit includes:
Calculating a difference between a payload size of the second data packet and a size of the second fragment data frame,
The third data frame is divided into a third fragment data frame and a fourth fragment data frame, the size of the third fragment data frame being a difference between a payload size of the second data packet and a size of the second fragment data frame Wherein the third piece of data frame in the third data frame corresponds to a higher byte than the fourth piece of data frame,
And the third piece of data frame is included in a remaining portion of the payload of the second data packet. 10. The method of claim 9,
The control unit includes:
The first data frame is included in the payload of the first data packet so that the first piece of data frame and the second piece of data frame are sequentially transmitted and then the first piece of data frame is included; And the third piece of data frame is included after the second piece of data frame is included in the payload of the data packet. 6. The method of claim 5,
The control unit includes:
If the size of the first data frame is smaller than the payload size of the first data packet, the data frame classified into the access category to which the first data frame belongs, And a data frame to be transmitted next to the first data frame. The method according to claim 1,
The communication device comprising:
The method comprising: transmitting the data packet to the receiving end and receiving a reception acknowledgment message for the transmitted data packet from the receiving end, And a second bit indicating whether the other of the plurality of data frames is normally received. Transmitting the data frame in an Enhanced Distributed Channel Access (EDCA) scheme in which a data frame is categorized into one of a plurality of access categories and the data frame is transmitted according to a priority assigned to each access category, CLAIMS What is claimed is: 1. A communication method in which the plurality of access categories share the transmission opportunity to transmit together the data frames to which they belong, for a transmission opportunity (TXOP)
The control unit retrieving the data frame from the storage unit;
Generating a data packet having a predetermined size by adding the additional data for transmission to the data frame, wherein the control unit includes a plurality of data frames in a single data packet transmitted during the transmission opportunity; And
The communication unit transmitting the data packet to a receiving end via a communication medium;
/ RTI > 14. The method of claim 13,
Wherein the transmitting comprises:
And the wireless communication module wirelessly transmitting the data packet to the receiving end. 15. The method of claim 14,
Wherein the wirelessly transmitting comprises:
Wherein the wireless communication module transmits the data packet using a plurality of antennas. 14. The method of claim 13,
Wherein the transmitting comprises:
And simultaneously transmitting the data packet during the transmission opportunity to a plurality of different receiving ends. 14. The method of claim 13,
Wherein generating the data packet comprises:
When a size of a first data frame to be included in a first data packet is smaller than a payload size of the first data packet, a second data frame different from the first data frame is allocated to a remaining part of the payload of the first data packet The method comprising the steps of: 18. The method of claim 17,
Wherein the step of including the second data frame in a remaining portion of the payload of the first data packet comprises:
Calculating a difference between a payload size of the first data packet and a size of the first data frame;
Dividing the second data frame into a first piece of data frame and a second piece of data frame, the size of the first piece of data frame corresponding to the difference, and in the second data frame, A second data frame dividing step of being arranged in a higher byte than the second fragment data frame; And
Including the first piece of data frame in a remaining portion of the payload of the first data packet;
/ RTI > 19. The method of claim 18,
Wherein generating the data packet comprises:
Comprising constructing the first data packet with the first data frame and the first fragment data frame and then including the second fragment data frame in a second data packet transmitted after the first data packet, Way. 20. The method of claim 19,
Wherein the step of including the second fragment data frame in the second data packet comprises:
If the size of the second fragment data frame is smaller than the payload size of the second data packet, including a third data frame different from the second data frame in a remaining portion of the payload of the second data packet, Comprising: 21. The method of claim 20,
Wherein the step of including the third data frame in a remaining portion of the payload of the second data packet comprises:
Calculating a difference between a payload size of the second data packet and a size of the second fragment data frame;
The third data frame is divided into a third fragment data frame and a fourth fragment data frame, the size of the third fragment data frame being a difference between a payload size of the second data packet and a size of the second fragment data frame Wherein the third piece of data frame in the third data frame is arranged in a higher byte than the fourth piece of data frame; And
Including the third piece of data frame in a remaining portion of the payload of the second data packet;
/ RTI > 22. The method of claim 21,
Wherein generating the data packet comprises:
The first data frame is included in the payload of the first data packet so that the first piece of data frame and the second piece of data frame are sequentially transmitted and then the first piece of data frame is included; And the third piece of data frame is included after the second piece of data frame is included in the payload of the data packet. 18. The method of claim 17,
Wherein generating the data packet comprises:
If the size of the first data frame is smaller than the payload size of the first data packet, the data frame classified into the access category to which the first data frame belongs, And including a data frame to be transmitted next to the first data frame. 14. The method of claim 13,
The communication method includes:
Further comprising: after the data packet is transmitted to the receiving end, the communication unit receiving a receiving acknowledgment message for the transmitted data packet from the receiving end, A first bit indicating whether one of the data frames of the plurality of data frames is normally received and a second bit indicating whether the other one of the plurality of data frames is normally received. A storage unit for storing a data frame;
A control unit for generating a data packet having a predetermined size by adding additional data for transmission to the data frame; And
And a communication unit for transmitting the data packet to a station via a communication medium,
The control unit includes:
Control to transmit the data frame in an enhanced distributed channel access (EDCA) scheme in which the data frame is categorized into one of a plurality of access categories and the data frame is transmitted according to a priority assigned to each access category,
To control the plurality of access categories to share the transmission opportunity to transmit data frames belonging to different access categories together during a transmission opportunity (TXOP)
Wherein the access opportunity includes a plurality of data frames in a single data packet transmitted during the transmission opportunity. A computer-readable recording medium,
A recording medium on which a program for causing a communication device to perform the communication method according to claim 13 is recorded. delete
KR1020140139975A 2014-10-16 2014-10-16 Communication apparatus and method, and access point employing the same KR101512731B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140139975A KR101512731B1 (en) 2014-10-16 2014-10-16 Communication apparatus and method, and access point employing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140139975A KR101512731B1 (en) 2014-10-16 2014-10-16 Communication apparatus and method, and access point employing the same

Publications (1)

Publication Number Publication Date
KR101512731B1 true KR101512731B1 (en) 2015-04-20

Family

ID=53053378

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140139975A KR101512731B1 (en) 2014-10-16 2014-10-16 Communication apparatus and method, and access point employing the same

Country Status (1)

Country Link
KR (1) KR101512731B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210135366A (en) * 2016-09-23 2021-11-12 주식회사 윌러스표준기술연구소 Wireless communication terminal and wireless communication method for multiuser edca operation
US11516879B2 (en) 2016-09-07 2022-11-29 Wilus Institute Of Standards And Technology Inc. Wireless communication method using enhanced distributed channel access, and wireless communication terminal using same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120068689A (en) * 2010-10-26 2012-06-27 한국전자통신연구원 Method of multiple frame transmission in wireless communication system and transmitter
KR20120081209A (en) * 2010-06-29 2012-07-18 엘지전자 주식회사 Method and apparatus for transmitting data frame in wlan system
KR101345135B1 (en) * 2007-08-28 2013-12-26 삼성전자주식회사 SCHEDULING METHOD AND SYSTEM FOR IEEE802.11e HCCA PROTOCOL
JP5453484B2 (en) * 2006-10-19 2014-03-26 クゥアルコム・インコーポレイテッド Extending power conservation for wireless communications

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5453484B2 (en) * 2006-10-19 2014-03-26 クゥアルコム・インコーポレイテッド Extending power conservation for wireless communications
KR101345135B1 (en) * 2007-08-28 2013-12-26 삼성전자주식회사 SCHEDULING METHOD AND SYSTEM FOR IEEE802.11e HCCA PROTOCOL
KR20120081209A (en) * 2010-06-29 2012-07-18 엘지전자 주식회사 Method and apparatus for transmitting data frame in wlan system
KR20120068689A (en) * 2010-10-26 2012-06-27 한국전자통신연구원 Method of multiple frame transmission in wireless communication system and transmitter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11516879B2 (en) 2016-09-07 2022-11-29 Wilus Institute Of Standards And Technology Inc. Wireless communication method using enhanced distributed channel access, and wireless communication terminal using same
US11523464B2 (en) 2016-09-07 2022-12-06 Wilus Institute Of Standards And Technology Inc. Wireless communication method using enhanced distributed channel access, and wireless communication terminal using same
US11825558B2 (en) 2016-09-07 2023-11-21 Wilus Institute Of Standards And Technology Inc. Wireless communication method using enhanced distributed channel access, and wireless communication terminal using same
KR20210135366A (en) * 2016-09-23 2021-11-12 주식회사 윌러스표준기술연구소 Wireless communication terminal and wireless communication method for multiuser edca operation
KR102371750B1 (en) 2016-09-23 2022-03-08 주식회사 윌러스표준기술연구소 Wireless communication terminal and wireless communication method for multiuser edca operation
US11528747B2 (en) 2016-09-23 2022-12-13 Wilus Institute Of Standards And Technology Inc. Wireless communication terminal and wireless communication method for multiuser EDCA operation
US11716759B2 (en) 2016-09-23 2023-08-01 Wilus Institute Of Standards And Technology Inc. Wireless communication terminal and wireless communication method for multiuser EDCA operation

Similar Documents

Publication Publication Date Title
US10574402B2 (en) Station (STA), access point (AP) and method for aggregation of data packets for uplink transmission
KR102477027B1 (en) Method and apparatus for transmitting and receiving acknowledgment in a wireless communication system
KR101948082B1 (en) Data Protection in Multi-User MIMO based Wireless Communication System
CN107078858B (en) Method for transmitting and receiving multi-user block acknowledgement frame in wireless LAN system and apparatus therefor
US20170047972A1 (en) Sub-channel allocation in orthogonal frequency division multiplex wlan
US9893824B2 (en) Packet transmission/reception method and apparatus in wireless communication system
US11057171B2 (en) Method and apparatus for MU resource request
US8902777B1 (en) Methods and apparatus for self-tuning aggregation of data units
CN110113808A (en) System and method for power control
EP3930277A1 (en) Method and apparatus for data transmission
US10616384B2 (en) Method and apparatus for transmitting trigger frame in wireless local area network
US11284388B2 (en) Resource indication method and apparatus
US20230042842A1 (en) Negotiation method for an operating mode, initiator, receiver, chip system, and medium
EP3242528A1 (en) Data transmission method, acquisition method, transmission apparatus and acquisition apparatus
KR20240005082A (en) Communication methods and devices
TWI685265B (en) Method for wireless system and wireless device
KR101512731B1 (en) Communication apparatus and method, and access point employing the same
WO2017067253A1 (en) Method and device for confirming traffic category-based indication
KR20110120052A (en) Method for communicating data using sequential response protocol and station of enabling the method
EP4247089A1 (en) Information transmission method, communication apparatus, computer-readable storage medium, and chip
KR101837966B1 (en) Data Protection in Multi-User MIMO based Wireless Communication System
CN102938909B (en) The sweep-out method of redundancy NAV duration in a kind of WLAN (wireless local area network) TXOP
KR20220094448A (en) Apparautus and Method for Downlink Scheduling in OFDM-based Multi-User MIMO System

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180406

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20190408

Year of fee payment: 5