KR102475874B1 - Wireless communication method and apparatus for close proximity communications - Google Patents

Abstract

A wireless communication method and apparatus for proximity communication are disclosed. A wireless communication method by a transmitter includes a header check sequence (HCS) field including header verification information and a parity bit field including information for correcting errors occurring in transmission of a physical layer (PHY) frame. creating a frame; and transmitting the PHY frame to a receiver. Here, the spreading factor of the header of the PHY frame may be a multiple of 2.

Description

Wireless communication method and apparatus for proximity communication {WIRELESS COMMUNICATION METHOD AND APPARATUS FOR CLOSE PROXIMITY COMMUNICATIONS}

The following description relates to a wireless communication method and apparatus using a PHY frame.

Transmission technology in the 60 GHz band, such as the existing 802.15.3c technology, supports only transmission in a single channel. The 802.15.3c technology does not support channel bonding or multiple-input and multiple-output (MIMO), which are technologies for higher throughput in proximity communication.

The present invention easily implements proximity communication by processing a PHY frame so that robust communication can be performed even at an improved speed in proximity communication with significantly improved throughput using channel bonding, etc., and throughput in proximity communication provides ways to improve it.

A wireless communication method by a transmitter according to an embodiment includes a header check sequence (HCS) field including information about header verification and information for correcting an error occurring in transmission of the physical layer (PHY) frame. generating a PHY frame including a parity bit field; and transmitting the PHY frame to a receiver.

A spreading factor of the header of the PHY frame may be a multiple of 2.

According to an embodiment, proximity communication is easily implemented by processing a PHY frame so that robust communication can be performed even at an increased speed in proximity communication with significantly improved throughput than conventional communication using channel bonding, etc. throughput can be improved.

1A is a diagram showing the overall configuration of a system for proximity communication according to an embodiment.
1B is a diagram illustrating detailed configurations of a transmitter and a receiver for proximity communication according to an embodiment.
2 is a diagram illustrating a PHY frame structure of an LC PHY according to an embodiment.
3A is a diagram illustrating a header structure of an LC PHY according to an embodiment.
3B is a diagram illustrating a structure in which a pilot symbol field is included in a header of an LC PHY according to an embodiment.
3C is a diagram illustrating a structure in which a pilot symbol field is included in a header of an LC PHY according to another embodiment.
4 is a diagram showing the structure of a MAC header field included in a PHY frame of an LC PHY according to an embodiment.
5A is a flowchart illustrating a processing procedure of a base header field included in a PHY frame of an LC PHY according to an embodiment.
5B is a flowchart illustrating a processing procedure of a base header field included in a PHY frame of an LC PHY according to another embodiment.
6A is a flowchart illustrating a process of processing a frame body included in a PHY frame of an LC PHY according to an embodiment.
6B is a diagram showing a block structure of a PHY frame of an LC PHY according to an embodiment.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only, and may be modified and implemented in various forms. Therefore, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, such terms should only be construed for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, but one or more other features or numbers, It should be understood that the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded.

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 commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. don't

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

1A is a diagram showing the overall configuration of a system for proximity communication according to an embodiment.

The present invention proposes a physical layer (PHY) frame structure for robustly performing high-speed P2P transmission between two terminals at a close distance. High-speed P2P transmission can be achieved by supporting channel bonding or MIMO. Here, the proximity distance may refer to a distance within 10 cm, for example. The PHY frame structure proposed herein can support 802.15.3e communication technology.

The present invention may include a PHY frame structure capable of supporting channel bonding to support higher throughput in a 60 GHz band wireless personal area network (WPAN) technology such as 802.15.3e. The 802.15.3e technology is a technology that enables high-speed multimedia data download when a user tag approaches a kiosk or a touch gate.

According to one embodiment, in step 111, the transmitter 110 may generate a signal including a PHY frame including a preamble, header, and payload fields. In step 112, the transmitter 110 may transmit a signal to the receiver 120 at a short distance. The signal may include a medium access control (MAC) frame and a PHY frame. At step 121, the receiver 120 may process the PHY frame. The receiver 121 may obtain information necessary for short-range communication by processing the PHY frame 112 .

The transmitter 110 or the receiver 120 may refer to an electronic product supporting proximity communication. For example, the transmitter 110 or the receiver 120 may include a mobile phone, a camera, a TV, home appliances such as a refrigerator, and a car.

Transmitter 110 may modulate certain fields while generating the PHY frame. The modulation method may be an on-off keying (OOK) modulation method. The OOK modulation scheme may be referred to as a low complexity (LC) modulation scheme. A PHY frame using the OOK modulation scheme may be referred to as an LC PHY frame or an OOK PHY frame. In addition, channel bonding may be used in the LC PHY to improve throughput. The LC PHY frame has the advantage of being easier to implement and easier to apply than 802.15.3c to products requiring high throughput while being inexpensive.

1B is a diagram illustrating detailed configurations of a transmitter and a receiver for proximity communication according to an embodiment.

According to one embodiment, the transmitter 110 may include a communication unit 114 and a processor 115 .

At transmitter 110, processor 115 generates a PHY frame that includes preamble, header, and payload fields. The communication unit 114 transmits the PHY frame generated by the processor 115 to the receiver 120.

According to one embodiment, the receiver 120 may include a communication unit 124 and a processor 125 .

In the receiver 120, the communication unit 124 may receive a PHY frame including a preamble, header and payload fields from the transmitter 110. The processor 125 may obtain information necessary for proximity communication from the received PHY frame.

The preamble may include information on at least one of the number of bonded communication channels used for transmission of the PHY frame and a spreading factor. The header may include information on at least one of whether to transmit a PHY frame in a frame aggregation scheme, total length information of a MAC frame body, and whether pilot symbols are used.

2 is a diagram illustrating a PHY frame structure of an LC PHY according to an embodiment.

According to one embodiment, the PHY frame of the LC PHY may include a PHY preamble, a frame header, and a PHY payload field.

The PHY preamble is a signal generated within a PHY frame and may include information on at least one of the number of bonded communication channels and a spreading factor used for transmission of the PHY frame. In addition, the preamble includes information on automatic gain control (AGC), time synchronization, frequency synchronization, frame synchronization, and the like, and may be used to demodulate the transmitted frame by the receiver when received by the receiver.

The PHY header included in the frame header may include information on at least one of whether or not to transmit the frame in a frame aggregation method, whether to use a pilot symbol, and information on the total length of the MAC frame body. .

The frame header may include a PHY header, a MAC header, HCS, and RS (Reed Soloman) parity bits.

The PHY payload field may include a part of data that is a fundamental purpose of transmission, excluding headers and metadata, which are information for proximity communication.

A processing procedure for integrated frames is the same as a processing procedure for a general MAC frame body payload field, and is not included in a header processing procedure.

3A is a diagram illustrating a header structure of an LC PHY according to an embodiment.

The LC PHY header may include a scrambler seed ID field, an aggregation field, a frame length field, and a reserved field.

The scrambler seed ID field may include information about a scrambler seed identifier.

The integration field may be set to '1' when frame integration is used and set to '0' when frame integration is not used. According to another embodiment, when a frame is always transmitted in an integrated form using a frame aggregation format even when transmitting a single frame, the frame aggregation field may be omitted.

The frame length field may indicate the length of the MAC frame body excluding the header and preamble. The frame length field may use an octet unit. The length of the MAC frame body may include frame payloads, a MAC sub-header included in the integrated frame, padding, and FCS. Frame length field can use unsigned integer. According to an embodiment, the receiver can know in advance the length of the entire frame to be received from the transmitter based only on the frame length field of the PHY header.

Information on Modulation and Coding Schemes (MCS) (the number of bonded communication channels and spreading factor in case of using OOK PHY) is included in the SFD (Start Frame Delimeter) field included in the preamble, and is separately stored in the PHY header. may not be included. As such, since MCS-related information is already included in the SFD field of the preamble, the number of bits in the PHY header indicating MCS-related information is reduced. OOK is always used for modulation, so there is no need to inform separately about modulation, and the spreading factor can appear in the preamble.

According to an embodiment, a pilot symbol may be used in a PHY layer during frame transmission. Even when a pilot symbol is used, a separate field indicating the use of a pilot symbol may not be included as in the header of the LC PHY of FIG. 3A. For example, if the pilot symbol is always used, a separate field representing the use of the pilot symbol may not be included. As another example, since there is little need to use equalization in the case of single-channel or 2-channel bonding, pilot symbols are not used in the case of single-channel or 2-channel bonding, and pilot symbols are used in the case of 3-channel or 4-channel bonding. can be set to include Even in this case, it is not necessary to include a separate field indicating the use of pilot symbols.

3B is a diagram illustrating a structure in which a pilot symbol field is included in a header of an LC PHY according to an embodiment. 3B is another example of a configuration of a PHY frame. Whether or not pilot symbols are used is explicitly indicated in the PHY header, so that pilot symbols may or may not be included in the transmission frame as needed.

According to one embodiment, the header of the LC PHY may include a pilot symbol field. The pilot symbol field may explicitly indicate whether a pilot symbol is used.

For example, the pilot symbol field may be 1 bit, and when the bit of the pilot symbol field is 1, it may indicate that the pilot symbol is used. When the bit of the pilot symbol field is 0, it may indicate that the pilot symbol is not used.

When the bit of the pilot symbol field is 1, a pilot symbol having a default length may be used. For example, if the spreading factor (SF) is 1, the size of a block is 512, and the length of a pilot symbol included therein may be 4. If the spreading factor SF is 2, the size of the block is 1024, and the pilot symbol length included in it may be 8. If the spreading factor SF is n, the size of the block is 512*n, and the length of pilot symbols included therein may be 4*n.

When the bit of the pilot symbol field is 0, the pilot symbol is not included in the transmitted frame.

Description of fields other than the pilot symbol field may refer to the description of FIG. 3A.

3C is a diagram illustrating a structure in which a pilot symbol field is included in a header of an LC PHY according to another embodiment.

According to another embodiment, the header of the LC PHY may include a pilot symbol field. The pilot symbol field may explicitly indicate the length of a pilot symbol.

For example, if the value of the pilot symbol field is 1, the length of the pilot symbol is 4, if the value of the pilot symbol field is 2, the length of the pilot symbol is 8, and if the value of the pilot symbol field is 3, the length of the pilot symbol is 16. , and if the value of the pilot symbol field is 4, the length of the pilot symbol may be 32, and if the value of the pilot symbol field is 5, the length of the pilot symbol may be 64. (in bits)

When the value of the pilot symbol field is 0, the pilot symbol is not included in the transmitted frame.

Description of fields other than the pilot symbol field may refer to the description of FIG. 3A.

4 is a diagram showing the structure of a MAC header field included in a PHY frame of an LC PHY according to an embodiment.

According to an embodiment, the MAC header field may include a Frame Control field, a Pairnet field, a Dest ID field, a SrcID field, an ACK field, and a reserved field. According to one embodiment, the length of the MAC header field may consist of 10 octets.

The frame control field may include information required for frame control. The Pairnet ID field may include information about an ID (Pairnet ID) of a P2P network generated by a terminal serving as a PNC (kiosk or access point). The Dest ID field and the SrcID field may include information about a frame destination address and a frame source address. The ACK field may include information about which type of ACK is used.

5A is a flowchart illustrating a processing procedure of a base header field included in a PHY frame of an LC PHY according to an embodiment.

According to one embodiment, the transmitter 110 may generate a PHY header field based on information provided by the MAC. A header check sequence (HCS) field may be generated based on the combination of the PHY header field and the MAC header field. The HCS field may be combined after the MAC header field. The combined MAC header field and HCS field may be scrambled. HCS is information about header verification.

The PHY header field, the scrambled MAC header field, and the scrambled HCS field may be encoded based on a shortened reed soloman code, and RS parity bits may be calculated based on the encoded result. An RS parity bit field containing RS parity bits may be concatenated after the HCS field. For the shortened RS code, RS (Reed Soloman) 240, 224 may be used as a mother code. Here, RS is in the form of (n + 16, n), and n may indicate the number of octets of the combined content of the combined PHY header field, scrambled MAC header field, and scrambled HCS field. (Here, the RS parity bit may include information for correcting errors occurring in PHY frame transmission.)

A stuff bit field may be inserted if necessary.

For example, the size of one block of a finally generated PHY frame may be a spreading factor of SF * 512 in the case of a payload. For example, when SF = 1 or SF = 2, the finally generated PHY frame may be divided into blocks of 512 bits or 1024 bits in the case of a payload. For example, in the case of a header, the size of one block can always be 512 bits regardless of SF. The front part of each block is used for timing tracking, compensation for clock drift, compensation for frequency offset error, etc. A pilot word or pilot symbol used to perform frequency domain equalization by serving as a prefix may be inserted.

If the number of bits of the contents (PHY header field, scrambled MAC header, scrambled HCS field, RS parity bit) generated in the above process is not a multiple of the number of bits of the data part that can fit in one block, the stuff bit ( stuff bits) can be inserted to fill the last block. Here, if a pilot symbol is included in a block, the length of the data portion may be obtained by subtracting the length of the pilot symbol from the block size. When stuff bits are inserted, the corresponding stuff bits may be scrambled and included in the PHY frame. The value of the stuff bits is set to 0, and scrambling can be performed by continuously using a scrambler sequence in which the MAC header field and the HCS field are scrambled. If the stuff bits are not needed, the process of filling the stuff bits in FIG. 5A , that is, the process of generating and scrambling the stuff bits and inserting a field including scrambled stuff bit information can be omitted.

A header may be formed by concatenating a PHY header field, a scrambled MAC header field, a scrambled HCS field, an RS parity bit field, and (if a stuff bit is used) a scrambled stuff bit field.

The header may be spread using a pseudo-random binary sequence (PRBS) generated using a Linear Feedback Shift Register (LFSR). For example, a spreading factor SF = 16 may be used. When the spreading factor is greater than 16 for higher robustness, an additional spreading process may be performed. For example, when 32 is used as the spreading factor, bit repetition may be performed by additionally using a spreading factor of 2 as shown in FIG. 5A after spreading the spreading factor by 16. The spread header may be converted to OOK wave format.

In general, headers are important for strength. If the degree of toughness required is small, the diffusion factor can be reduced to 16 or 8, etc. When the degree of toughness required is large, a large value such as 32 may be used as the diffusion factor. The spreading factor can be 64 by adding additional bit repetitions or using a Golay sequence. Since the header can be sufficiently robust by using a large spreading factor, the pilot symbol can be omitted. In this case, a block building process may be omitted.

For example, the size of a block in the OOK PHY may be 512 bits. In the header, the PHY header field may be 32 bits, the MAC header field may be 80 bits, the HCS field may be 16 bits, and the RS parity bit field may be 128 bits. As a result, the header can be 256 bits in total.

When the pilot symbol is omitted, if the spreading factor of the header of the PHY frame is set to a multiple of 2 (eg, SF = 2, 4, 6, ..., 32, etc.), the 256-bit length of the PHY header field is 512 It can be a multiple of , that is, a multiple of the size of the block. In this case, since the stuff bit becomes unnecessary, the process of filling the stuff bit can be omitted. That is, the process of generating and scrambling stuff bits and the process of inserting scrambled stuff bits can be omitted. This case is shown in FIG. 5B, and unlike FIG. 5A, the processing of the header can be simplified.

6A is a flowchart illustrating a process of processing a frame body included in a PHY frame of an LC PHY according to an embodiment.

According to an embodiment, in step 602, the transmitter 110 scrambles a MAC frame body 601 including a MAC sub-header and a MAC sub-frame using PRBS. can do.

In step 603, the transmitter 110 may encode the scrambled MAC frame body. Transmitter 110 may encode the scrambled MAC frame body into RS (240, 224). In this case, since the number of bits processed at one time is a multiple of 32, processing can be performed in units of 32 bits, which can be efficiently processed.

In step 604, stuff bits may be inserted into the encoded and scrambled MAC frame body.

In step 605, the result of inserting the stuff bits may be spread. When the OOK modulation scheme is used, bit repetition with a spreading factor of SF = 2 may be applied. For example, 10101010 can be spread by applying bit repetition to 1100110011001100. Through this, complexity can be alleviated.

The spread result in step 606 may be converted into an OOK modulation method through a constellation mapper.

A pilot symbol may be inserted into the transformed result in step 607 and converted into a block by a subblock builder.

6B is a diagram showing a block structure of a PHY frame of an LC PHY according to an embodiment.

For example, the block size of the header of data modulated by the OOK modulation scheme may be 512 regardless of the spreading factor. The block size of the payload can be spread factor SF * 512. For example, if the spreading factor is 1, the block size can be 512 bits, and if it is 2, the block size can be 1024 bits.

According to one embodiment, the front part of each block is used for timing tracking, clock drift compensation, frequency offset error compensation, etc. In addition, a pilot word or pilot symbol used to perform frequency domain equalization by serving as a cyclic prefix may be inserted.

According to an embodiment, whether a pilot symbol is to be included and the length of the pilot symbol may be indicated through a separate field included in the header. When a pilot symbol is included in frame transmission, the pilot symbol can be set to '1010' in case of SF = 1, '11001100' in case of SF = 2, etc. in the frame body modulated by the OOK modulation method. That is, a pilot symbol when SF = 1 is bit-repeated with SF = 2 can be used as a pilot symbol when SF = 2. Similarly, when SF = N, the pilot symbol may be a bit repetition of the pilot symbol when SF = 1 with SF = N. In this way, when spreading is applied, a bit repetition of a pilot symbol in the case of SF = 1 as many times as the number of corresponding SFs can be set as a pilot symbol. In this way, when the length of the pilot symbol is determined according to SF, only whether or not the pilot symbol is included in the transmission frame is indicated using 1 bit in the PHY header, and the length of the pilot symbol does not need to be indicated separately.

For example, when pilot symbols are set in the above manner, when SF = 1, the block size is 512, the double pilot symbol is 4 bits, and the number of bits of data that can be included in one block can be 508 bits. . When SF = 2, the block size is 1024, the dual pilot symbol is 8 bits, and the data bits that can be included in one block can be 1016 bits. As such, if SF = N, the block size may be 512 bits X N, the pilot symbol may be 4 bits X N, and the number of bits of data included in one block may be 508 bits X N.

As such, when the block size and the number of bits of the pilot symbol are multiples of SF and the pilot symbol is repeated as many times as the SF value, the pilot symbol generation and insertion process is performed after the constellation mapping process, and the corresponding SF Instead of separately generating and inserting pilot symbols for values, the MAC frame body encoded before the spreading step is divided into 508-bit units, and then 4 bits of the pilot symbol corresponding to the case of SF = 1 are added in front of each 508-bits. Since the same pilot insertion result can be obtained by inserting and spreading it together, the block building process can be simplified.

Divide the encoded MAC frame body into units of the number of bits of the data portion that can fit in one block (e.g., units of 508 bits if SF = 1 and pilot symbols are used, or units of 512 bits if pilot symbols are not used). In the case of the last block, the MAC frame body may not fill the bit number unit of the data part that can be entered in one block. According to an embodiment, in this case, the transmitter 110 may insert stuff bits to fill a corresponding bit number unit. For example, for the last block, the transmitter 110 inserts stuff bits so that the number of pilot symbol bits + the number of bits of the data part + the number of stuff bits is equal to the block size of 512 bits in the case of SF = 1. can do.

In other words, if the number of bits of the encoded MAC frame body is not a multiple of the number of bits of the data part that can actually fit in one block, stuff bits can be inserted behind to fill the last block. Here, if a pilot symbol is included in a block, the length of the data portion may be obtained by subtracting the length of the pilot symbol from the block size. If a pilot symbol is not included in a block, the number of bits of the data portion is equal to the number of bits of one block.

When stuff bits are inserted, the stuff bits may be scrambled and included in the PHY frame. The values of the stuff bits are set to 0, and the transmitter 110 may continue to scramble using the scrambler sequence resulting from scrambling the MAC frame body.

The frame body uses bit repetition when spreading, and since the size of one block is 512 * N when SF = N, the stuff bit insertion is always processed based on the case of SF = 1, and then the stuff bit is inserted. Spread the included frames with SF = N. That is, stuff bits are inserted before the frame spreading step 605 when SF = 1, that is, when the block size is 512 (when pilot symbols are not used) or 508 (when pilot symbols are used), This can be diffused in step 605. This can simplify the block building process.

In this way, when the block size and the number of bits of the pilot symbol are set to a multiple of SF, and the pilot symbol is bit-repeated as many times as SF, the total number of bits after spreading and the block size are calculated to generate stuff bits Instead, the transmitter 110 performs a block building process by performing a pilot symbol generation process and a stuff bit generation process in the case of SF = 1 before the spreading step, and spreading the generated frame body, stuff bit, and pilot symbol together. can be simplified.

When channel bonding is used, the time duration in which pilot symbols are transmitted is shortened, so timing tracking using pilot symbols, compensation for clock drift, and frequency offset errors It may be difficult to perform compensation for errors, frequency domain equalization, and the like.

According to an embodiment, in this case, the transmitter 110 may increase the block size and the number of pilot symbol bits in proportion to the number of bonded channels. For example, if SF = N and the number of bonded channels is M, the block size may be 512 bits X N X M, the number of pilot symbol bits may be 4 bits X N X M, and the number of data bits may be 508 bits X N X M.

Through this, since the transmission time of the pilot symbol is the same as that of a single channel, timing tracking using the pilot symbol, clock drift compensation, frequency offset error compensation, and frequency domain equalization can be easily performed.

According to another embodiment, in the case of ultra-short distance transmission within 10 cm, since the channel is stable and the probability of error occurrence is low, it is not necessary to increase the block size and the number of pilot symbol bits in proportion to the number of channel bonding as described above, , the block size and the number of pilot symbol bits are increased only in proportion to the number of SFs during channel bonding.

The embodiments described above may be implemented as hardware components, software components, and/or a combination of hardware components and software components. For example, the devices, methods and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate (FPGA). array), programmable logic units (PLUs), microprocessors, or any other device capable of executing and responding to instructions. A processing device may run an operating system (OS) and one or more software applications running on the operating system. A processing device may also access, store, manipulate, process, and generate data in response to execution of software. For convenience of understanding, there are cases in which one processing device is used, but those skilled in the art will understand 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 can include. For example, a processing device may include a plurality of processors or a processor and a controller. Other processing configurations are also possible, such as parallel processors.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. Software may be distributed on networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. Computer readable media may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on a computer readable medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

110: transmitter
120: receiver
114: communication department
115: processor
124: communication department
125: processor

Claims (11)

In the wireless communication method by the transmitter,
generating a physical layer (PHY) frame including a preamble, a frame header, and a payload field; and
Transmitting the PHY frame to a receiver
including,
The frame header includes a PHY header, a medium access control (MAC) header, a header check sequence (HCS) field including information for verifying the PHY header and the MAC header, and correction of errors occurring in transmission of the PHY frame. Including a parity bit field containing information for
When the transmitter uses LC PHY (Low Complexity PHY), the PHY header includes a pilot symbol field indicating whether pilot symbols are used, and the preamble is a spreading factor and used for transmission of the PHY frame Includes information on at least one of the number of bonded communication channels,
The number of bits of the pilot symbol is determined to be proportional to at least one of the spreading factor and the number of bonded communication channels.
wireless communication method.
delete According to claim 1,
The PHY frame is generated based on an on-off keying (OOK) modulation method,
wireless communication method.
delete delete According to claim 1,
The spreading factor of the frame header is a multiple of 2,
wireless communication method.
According to claim 6,
When the spreading factor of the frame header is a multiple of 2, the frame header does not include a pilot symbol.
wireless communication method.
According to claim 6,
When the spreading factor of the frame header is a multiple of 2, no stuff bits are added to the frame header.
wireless communication method.
According to claim 6,
The block size of the frame header is 512 regardless of the spreading factor.
wireless communication method
Claim 1, claim 3, claim 6, claim 7, claim 8, and a computer-readable recording medium containing a program for performing the method of any one of claims 9.
electronic devices,
a memory in which a program for wireless communication is recorded; and
Processor that executes the above program
including,
said program,
generating a physical layer (PHY) frame including a preamble, a frame header, and a payload field; and
Transmitting the PHY frame to a receiver
and
The frame header includes a PHY header, a medium access control (MAC) header, a header check sequence (HCS) field including information for verifying the PHY header and the MAC header, and correction of errors occurring in transmission of the PHY frame. Including a parity bit field containing information for
When the electronic device, which is a transmitter, uses LC PHY (Low Complexity PHY), the PHY header includes a pilot symbol field indicating whether pilot symbols are used, and the preamble includes a spreading factor and Includes information on at least one of the number of bonded communication channels used for transmission;
The number of bits of the pilot symbol is determined to be proportional to at least one of the spreading factor and the number of bonded communication channels.
electronic device.

Images