KR102522787B1 - Method and apparatus for transmitting and receiving signal using orthogonal sequence in communication system - Google Patents

Abstract

A method and apparatus for transmitting and receiving a signal using an orthogonal sequence in a communication system are disclosed. To achieve the above object, a method of operating a first communication node according to a first embodiment of the present invention includes setting a first parameter for multiplexing a plurality of information bits; setting the length of an orthogonal sequence corresponding to each of the plurality of information bits; setting a second parameter indicating phase information corresponding to each of the plurality of information bits; and generating orthogonal sequences of the plurality of information bits based on the first parameter, the second parameter, and the length of the orthogonal sequence.

Description

Method and device for transmitting and receiving signals using orthogonal sequences in a communication system

The present invention relates to a technology for transmitting and receiving a signal in a communication system, and more particularly, to a technology for transmitting and receiving a signal using an orthogonal sequence.

Along with the development of information and communication technology, various wireless communication technologies are being developed. Representative wireless communication technologies include long term evolution (LTE) and new radio (NR), which are defined in the 3rd generation partnership project (3GPP) standard. LTE may be one wireless communication technology among 4th generation (4G) wireless communication technologies, and NR may be one wireless communication technology among 5th generation (5G) wireless communication technologies.

For the processing of rapidly increasing wireless data after the commercialization of 4G communication systems (eg, communication systems supporting LTE), the frequency band (eg, frequency bands below 6 GHz) of the 4G communication system as well as the 4G communication system A 5G communication system (eg, a communication system supporting NR) using a frequency band higher than the frequency band (eg, a frequency band of 6 GHz or higher) is being considered. The 5G communication system may support eMBB (enhanced Mobile BroadBand), URLLC (Ultra-Reliable and Low Latency Communication), and mMTC (massive machine type communication).

In a communication system, signals (eg, information, data) may be transmitted using orthogonal sequences. Here, the length of the orthogonal sequence may be equal to the length corresponding to the number of allocated frequency resources (eg, subcarriers, resource elements (REs)). In this case, reception performance may deteriorate due to frequency selective fading and/or time synchronization error.

An object of the present invention to solve the above problems is to provide a method and apparatus for transmitting and receiving signals using an orthogonal sequence having a specific length in a communication system.

To achieve the above object, a method of operating a first communication node according to a first embodiment of the present invention includes setting a first parameter for multiplexing a plurality of information bits; setting the length of an orthogonal sequence corresponding to each of the plurality of information bits; setting a second parameter indicating phase information corresponding to each of the plurality of information bits; generating orthogonal sequences of the plurality of information bits based on the first parameter, the second parameter, and the length of the orthogonal sequence; and transmitting the orthogonal sequences to a second communication node using radio resources.

에 기초하여 생성될 수 있고,

는 상기 복수의 정보 비트들 중에서

번째 정보 비트의 상기 직교 시퀀스일 수 있고,

는 상기

번째 정보 비트에 대한 상기 제1 파라미터, 상기 제2 파라미터, 및 상기 직교 시퀀스의 길이에 기초하여 결정될 수 있고,

는 상기

번째 정보 비트의 상기 직교 시퀀스의 길이일 수 있다.Here, each of the orthogonal sequences is

can be generated based on

Among the plurality of information bits

It may be the orthogonal sequence of the th information bit,

said

It may be determined based on the first parameter, the second parameter, and the length of the orthogonal sequence for the th information bit,

said

It may be the length of the orthogonal sequence of the th information bit.

번째 정보 비트의 값이 0인 경우에 상기 제2 파라미터의 값은 0일 수 있고, 상기

번째 정보 비트의 값이 1인 경우에 상기 제2 파라미터의 값은

일 수 있다.here, above

When the value of the th information bit is 0, the value of the second parameter may be 0,

When the value of the th information bit is 1, the value of the second parameter is

can be

는

에 기초하여 생성될 수 있고,

는 상기 제1 파라미터일 수 있고,

는 상기 제2 파라미터일 수 있다.here,

Is

can be generated based on

May be the first parameter,

may be the second parameter.

Here, the sum of the lengths of the orthogonal sequences may be a length corresponding to the number of frequency resources constituting the radio resources.

Here, the orthogonal sequences may have the same length.

Here, one or more of the first parameter, the second parameter, and information indicating the length of the orthogonal sequence may be signaled to the second communication node.

번 반복된

정보 비트들일 수 있다.Here, the plurality of information bits is one information bit

repeated times

may be bits of information.

Here, the transmitting to the second communication node may include: mapping a first orthogonal sequence of a first information bit among the plurality of information bits from a lowest frequency resource; sequentially mapping orthogonal sequences other than the first orthogonal sequence among the orthogonal sequences to remaining frequency resources; and transmitting the mapped orthogonal sequences.

To achieve the above object, a method of operating a second communication node according to a second embodiment of the present invention includes performing a monitoring operation to obtain orthogonal sequences generated based on a plurality of information bits from a first communication node. ; obtaining received sequences for the orthogonal sequences by the monitoring operation; generating complex conjugates for the orthogonal sequences based on parameters used for generation of the orthogonal sequences; and detecting a value of each of the plurality of information bits corresponding to a specific value calculated based on the received sequences and the complex conjugate numbers.

일 수 있고,

는 상기 직교 시퀀스들이 수신된 주파수 자원들의 개수일 수 있다.Here, the received sequences are

can be,

may be the number of frequency resources from which the orthogonal sequences are received.

Here, the parameters are a first parameter for multiplexing the plurality of information bits, a second parameter indicating phase information corresponding to each of the plurality of information bits, and a third parameter indicating the length of each of the orthogonal sequences. can include

에 기초하여 생성될 수 있고,

는 상기 복수의 정보 비트들 중에서

번째 정보 비트의 직교 시퀀스일 수 있고,

는 상기 제1 파라미터, 상기 제2 파라미터, 및

에 기초하여 결정될 수 있고,

는 상기

번째 정보 비트의 상기 직교 시퀀스의 길이를 지시하는 상기 제3 파라미터일 수 있고, 상기 직교 시퀀스들에 대한 상기 켤레 복소수들은

일 수 있다.Here, each of the orthogonal sequences is

can be generated based on

Among the plurality of information bits

It may be an orthogonal sequence of th information bits,

Is the first parameter, the second parameter, and

can be determined based on

said

may be the third parameter indicating the length of the orthogonal sequence of the th information bit, and the complex conjugates of the orthogonal sequences are

can be

에 기초하여 계산될 수 있고,

는 상기 특정 값일 수 있고,

은

또는

에 의해 결정될 수 있고,

은

또는

에 의해 결정될 수 있고,

은 상기 복수의 정보 비트들의 개수일 수 있고,

는 상기 복수의 정보 비트들 중에서

번째 정보 비트의 직교 시퀀스의 길이일 수 있고,

는 상기 수신 시퀀스들일 수 있고,

는 상기 직교 시퀀스들에 대한 상기 켤레 복소수들일 수 있다.Here, the specific value is

can be calculated based on

may be the above specific value,

silver

or

can be determined by

silver

or

can be determined by

May be the number of the plurality of information bits,

Among the plurality of information bits

It may be the length of the orthogonal sequence of the th information bit,

may be the received sequences,

may be the conjugate complex numbers for the orthogonal sequences.

번 반복된

정보 비트들일 수 있다.Here, the plurality of information bits is one information bit

repeated times

may be bits of information.

A first communication node according to a third embodiment of the present invention for achieving the above object includes a processor; a memory in electronic communication with the processor; and instructions stored in the memory, wherein when the instructions are executed by the processor, the instructions cause the first communication node to set a first parameter for multiplexing a plurality of information bits; set the length of an orthogonal sequence corresponding to each of the plurality of information bits; set a second parameter indicating phase information corresponding to each of the plurality of information bits; generate orthogonal sequences of the plurality of information bits based on the first parameter, the second parameter, and the length of the orthogonal sequence; and transmits the orthogonal sequences to the second communication node using radio resources.

에 기초하여 생성될 수 있고,

는 상기 복수의 정보 비트들 중에서

번째 정보 비트의 상기 직교 시퀀스일 수 있고,

는 상기

번째 정보 비트에 대한 상기 제1 파라미터, 상기 제2 파라미터, 및 상기 직교 시퀀스의 길이에 기초하여 결정될 수 있고,

는 상기

번째 정보 비트의 상기 직교 시퀀스의 길이일 수 있다.Here, each of the orthogonal sequences is

can be generated based on

Among the plurality of information bits

It may be the orthogonal sequence of the th information bit,

said

It may be determined based on the first parameter, the second parameter, and the length of the orthogonal sequence for the th information bit,

said

It may be the length of the orthogonal sequence of the th information bit.

는

에 기초하여 생성될 수 있고,

는 상기 제1 파라미터일 수 있고,

는 상기 제2 파라미터일 수 있다.here,

Is

can be generated based on

May be the first parameter,

may be the second parameter.

Here, one or more of the first parameter, the second parameter, and information indicating the length of the orthogonal sequence may be set by the second communication node.

Here, when the orthogonal sequences are transmitted to the second communication node using radio resources, the instructions include: mapping a first orthogonal sequence of a first information bit among the plurality of information bits from a lowest frequency resource; sequentially mapping orthogonal sequences other than the first orthogonal sequence among the orthogonal sequences to remaining frequency resources; And it can be further executed to transmit the mapped orthogonal sequences.

According to the present invention, signals (eg, information, data) can be transmitted using orthogonal sequences. Here, the length of the orthogonal sequence may be smaller than the length corresponding to the number of allocated frequency resources (eg, subcarriers, resource elements (REs)). In this case, degradation of reception performance due to frequency selective fading and/or time synchronization error can be prevented and signal-to-noise ratio (SNR) can be improved. Therefore, the probability of error occurrence in the signal detection procedure (eg, data detection procedure) can be reduced, and the performance of the communication system can be improved.

1 is a conceptual diagram illustrating a first embodiment of a communication system.
2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
3 is a conceptual diagram illustrating a first embodiment of a mapping method between orthogonal sequences and frequency resources in a communication system.
4 is a flowchart illustrating a first embodiment of a method for transmitting a signal using an orthogonal sequence in a communication system.
5 is a flowchart showing a first embodiment of a method for receiving signals in a communication system;

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used 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, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, 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 to which the present invention belongs. 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 application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate overall understanding in the description of the present invention, the same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components are omitted.

A communication system to which embodiments according to the present invention are applied will be described. The communication system may be a 4G communication system (eg, a long-term evolution (LTE) communication system, an LTE-A communication system), a 5G communication system (eg, a new radio (NR) communication system), and the like. The 4G communication system can support communication in a frequency band of 6 GHz or less, and the 5G communication system can support communication in a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less. A communication system to which embodiments according to the present invention are applied is not limited to the contents described below, and embodiments according to the present invention can be applied to various communication systems. Here, the communication system may be used in the same sense as a communication network, "LTE" may indicate "4G communication system", "LTE communication system" or "LTE-A communication system", and "NR" may indicate "5G communication system" or "NR communication system".

1 is a conceptual diagram illustrating a first embodiment of a communication system.

Referring to FIG. 1, a communication system 100 includes a plurality of communication nodes 110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). In addition, the communication system 100 includes a core network (eg, a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), and a mobility management entity (MME)). can include more. When the communication system 100 is a 5G communication system (eg, a new radio (NR) system), the core network includes an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), and the like. can include

The plurality of communication nodes 110 to 130 may support communication protocols (eg, LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.) defined in the 3rd generation partnership project (3GPP) standard. The plurality of communication nodes 110 to 130 are CDMA (code division multiple access) technology, WCDMA (wideband CDMA) technology, TDMA (time division multiple access) technology, FDMA (frequency division multiple access) technology, OFDM (orthogonal frequency division) multiplexing) technology, filtered OFDM technology, CP (cyclic prefix)-OFDM technology, DFT-s-OFDM (discrete Fourier transform-spread-OFDM) technology, OFDMA (orthogonal frequency division multiple access) technology, SC (single carrier)-FDMA technology, NOMA (Non-orthogonal Multiple Access) technology, GFDM (generalized frequency division multiplexing) technology, FBMC (filter bank multi-carrier) technology, UFMC (universal filtered multi-carrier) technology, SDMA (Space Division Multiple Access) technology, etc. can support Each of the plurality of communication nodes may have the following structure.

2 is a block diagram showing a first embodiment of a communication node constituting a communication system.

Referring to FIG. 2 , a communication node 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to a network to perform communication. In addition, the communication node 200 may further include an input interface device 240, an output interface device 250, a storage device 260, and the like. Each component included in the communication node 200 may be connected by a bus 270 to communicate with each other.

The processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260 . The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. Each of the memory 220 and the storage device 260 may include at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may include at least one of a read only memory (ROM) and a random access memory (RAM).

Referring back to FIG. 1, the communication system 100 includes a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2), a plurality of terminals 130- 1, 130-2, 130-3, 130-4, 130-5, 130-6). Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell. Each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. The second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. The fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5, and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. there is. The first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1. The sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

Here, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is a NodeB (NB), an evolved NodeB (eNB), a gNB, an advanced base station (ABS), and a HR -BS (high reliability-base station), BTS (base transceiver station), radio base station, radio transceiver, access point, access node, radio access station (RAS) ), MMR-BS (mobile multihop relay-base station), RS (relay station), ARS (advanced relay station), HR-RS (high reliability-relay station), HNB (home NodeB), HeNB (home eNodeB), It may be referred to as a road side unit (RSU), a radio remote head (RRH), a transmission point (TP), a transmission and reception point (TRP), and the like.

Each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 includes user equipment (UE), terminal equipment (TE), advanced mobile station (AMS), HR-MS (high reliability-mobile station), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, mobile It may be referred to as a portable subscriber station, a node, a device, an on board unit (OBU), and the like.

Meanwhile, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may operate in different frequency bands or may operate in the same frequency band. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to each other through an ideal backhaul link or a non-ideal backhaul link, and , information can be exchanged with each other through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to the core network through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits a signal received from the core network to a corresponding terminal 130-1, 130-2, 130-3, and 130 -4, 130-5, 130-6), and signals received from corresponding terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 are transmitted to the core network can be sent to

In addition, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits MIMO (eg, single user (SU)-MIMO, multi-user (MU)- MIMO, massive MIMO, etc.), coordinated multipoint (CoMP) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, direct communication between devices (device to device communication, D2D) (or , proximity services (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. may be supported. Here, each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 is a base station 110-1, 110-2, 110-3, 120-1 , 120-2) and operations supported by the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be performed. For example, the second base station 110-2 can transmit a signal to the fourth terminal 130-4 based on the SU-MIMO scheme, and the fourth terminal 130-4 uses the SU-MIMO scheme. A signal may be received from the second base station 110-2. Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 based on the MU-MIMO scheme, and the fourth terminal 130-4 And each of the fifth terminal 130-5 may receive a signal from the second base station 110-2 by the MU-MIMO method.

Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may transmit a signal to the fourth terminal 130-4 based on the CoMP scheme, and The terminal 130-4 may receive signals from the first base station 110-1, the second base station 110-2, and the third base station 110-3 by CoMP. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 includes a terminal 130-1, 130-2, 130-3, and 130-4 belonging to its own cell coverage. , 130-5, 130-6) and a CA method. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 controls D2D between the fourth terminal 130-4 and the fifth terminal 130-5. and each of the fourth terminal 130-4 and the fifth terminal 130-5 may perform D2D under the control of the second base station 110-2 and the third base station 110-3, respectively. .

Next, methods for transmitting and receiving signals using orthogonal sequences in a communication system will be described. Even when a method (for example, transmission or reception of a signal) performed in a first communication node among communication nodes is described, a second communication node corresponding thereto is described as a method performed in the first communication node and a method (eg, signal transmission or reception) For example, receiving or transmitting a signal) may be performed. That is, when the operation of the terminal is described, the corresponding base station may perform an operation corresponding to the operation of the terminal. Conversely, when the operation of the base station is described, a terminal corresponding thereto may perform an operation corresponding to the operation of the base station.

일 수 있고, 정보 비트들의 전송을 위해 할당된 주파수 자원(예를 들어, 서브캐리어 또는 주파수 도메인에서 RE(resource element))의 개수는

일 수 있다. 정보 비트의 값은 0 또는 1일 수 있다.

개의 정보 비트들 중에서

번째 정보 비트의 전송을 위한 직교 시퀀스는 아래 수학식 1에 기초하여 생성될 수 있다.In the examples below, the number of information bits to be transmitted is

, and the number of frequency resources (eg, subcarriers or resource elements (REs) in the frequency domain) allocated for transmission of information bits is

can be The value of the information bit may be 0 or 1.

of the bits of information

An orthogonal sequence for transmission of the th information bit may be generated based on Equation 1 below.

는

번째 정보 비트의 전송을 위한 직교 시퀀스의 길이일 수 있다.

개의 정보 비트들은 동일한 길이를 가지는 직교 시퀀스들을 이용하여 전송될 수 있다. 또는,

개의 정보 비트들은 서로 다른 길이를 가지는 직교 시퀀스들을 이용하여 전송될 수 있다.

와

의 관계는 아래 수학식 2와 같이 정의될 수 있다.

Is

It may be the length of an orthogonal sequence for transmission of the th information bit.

N information bits may be transmitted using orthogonal sequences having the same length. or,

N information bits may be transmitted using orthogonal sequences having different lengths.

and

The relationship of may be defined as in Equation 2 below.

는 아래 수학식 3과 같이 정의될 수 있다.in Equation 1

Can be defined as in Equation 3 below.

는 다중화(multiplexing)를 위한 위상 결정 파라미터(이하, "다중화 파라미터"라 함)일 수 있다.

는

번째 정보 비트를 결정하는 위상 정보를 나타내는 파라미터(이하, "위상 파라미터"라 함)일 수 있다. 예를 들어,

번째 정보 비트의 값이 0인 경우,

는 0일 수 있다.

번째 정보 비트의 값이 1인 경우,

는

일 수 있다. 다중화 방법의 예로서, "

=0"은 제1 통신 노드(예를 들어, 제1 단말)에 할당될 수 있고, "

=1"은 제2 통신 노드(예를 들어, 제2 단말)에 할당될 수 있다. 이 경우, 복수의 통신 노드들(예를 들어, 제1 통신 노드 및 제2 통신 노드)의 정보 비트들은 동일한 자원들에서 다중화될 수 있다.

may be a phase determination parameter for multiplexing (hereinafter, referred to as a "multiplexing parameter").

Is

It may be a parameter (hereinafter referred to as “phase parameter”) indicating phase information that determines the th information bit. for example,

If the value of the th information bit is 0,

may be 0.

If the value of the th information bit is 1,

Is

can be As an example of a multiplexing method, "

= 0" may be assigned to the first communication node (eg, the first terminal), and "

= 1" may be assigned to the second communication node (eg, the second terminal). In this case, the information bits of the plurality of communication nodes (eg, the first communication node and the second communication node) It can be multiplexed on the same resources.

An orthogonal sequence generated based on Equation 1 may be mapped to radio resources (eg, frequency resources allocated for transmission of information bits). That is, the orthogonal sequence may be transmitted on allocated frequency resources. Orthogonal sequences may be mapped to frequency resources based on the scheme below.

3 is a conceptual diagram illustrating a first embodiment of a mapping method between orthogonal sequences and frequency resources in a communication system.

,

, . . . ,

)은 주파수 자원들에 매핑될 수 있다. 첫 번째 정보 비트의 직교 시퀀스인

은 할당된 주파수 자원들 중에서 가장 낮은 인덱스(예를 들어, 가장 낮은 주파수)를 가지는 서브캐리어 또는 RE부터 매핑될 수 있다. 나머지 정보 비트들의 직교 시퀀스들은 순차적으로 주파수 자원들에 매핑될 수 있다. 마지막 정보 비트의 직교 시퀀스인

은 할당된 주파수 자원들 중에서 가장 높은 인덱스(예를 들어, 가장 높은 주파수)를 가지는 서브캐리어 또는 RE에 매핑될 수 있다.Referring to Figure 3, orthogonal sequences (eg,

,

, . . . ,

) may be mapped to frequency resources. An orthogonal sequence of first information bits,

may be mapped from a subcarrier or RE having the lowest index (eg, lowest frequency) among allocated frequency resources. Orthogonal sequences of remaining information bits may be sequentially mapped to frequency resources. The orthogonal sequence of the last bits of information

may be mapped to a subcarrier or RE having the highest index (eg, highest frequency) among allocated frequency resources.

은 할당된 주파수 자원들 중에서 가장 높은 인덱스를 가지는 서브캐리어 또는 RE부터 매핑될 수 있다. 나머지 정보 비트들의 직교 시퀀스들은 순차적으로 주파수 자원들에 매핑될 수 있다. 마지막 정보 비트의 직교 시퀀스인

은 할당된 주파수 자원들 중에서 가장 낮은 인덱스를 가지는 서브캐리어 또는 RE에 매핑될 수 있다.Or, an orthogonal sequence of first information bits,

may be mapped from a subcarrier or RE having the highest index among allocated frequency resources. Orthogonal sequences of remaining information bits may be sequentially mapped to frequency resources. The orthogonal sequence of the last bits of information

may be mapped to a subcarrier or RE having the lowest index among allocated frequency resources.

4 is a flowchart illustrating a first embodiment of a method for transmitting a signal using an orthogonal sequence in a communication system.

)를 설정할 수 있다(S401). 제1 통신 노드는 각 정보 비트에 대응하는 직교 시퀀스의 길이(

)를 설정할 수 있다(S402). 단계 S402에서 제1 통신 노드는 수학식 2를 만족하는 직교 시퀀스의 길이(

)를 결정할 수 있다. 제1 통신 노드는 각 정보 비트의 값에 대응하는 위상 파라미터(

)를 설정할 수 있다(S403).Referring to FIG. 4 , the first communication node may be a base station or terminal (eg, UE) shown in FIG. 1 and may be configured the same as or similar to the communication node 200 shown in FIG. 2 . The first communication node may transmit a signal (eg, information or data) using an orthogonal sequence defined in Equation 1. The first communication node is a multiplexing parameter (

) can be set (S401). The first communication node is the length of the orthogonal sequence corresponding to each information bit (

) can be set (S402). In step S402, the first communication node determines the length of an orthogonal sequence that satisfies Equation 2 (

) can be determined. The first communication node is a phase parameter corresponding to the value of each information bit (

) can be set (S403).

), 직교 시퀀스의 길이(

), 및 위상 파라미터(

)를 수학식 3에 적용함으로써

를 생성할 수 있다. 제1 통신 노드는

를 수학식 1에 적용함으로써 직교 시퀀스(

)를 생성할 수 있다(S404). 제1 통신 노드는 직교 시퀀스(

)를 할당된 주파수 자원들(예를 들어,

개의 주파수 자원들)에서 제2 통신 노드로 전송할 수 있다(S405). 여기서, 직교 시퀀스(

)는 도 3에 도시된 방식에 기초하여 주파수 자원들에 매핑될 수 있고, 매핑된 직교 시퀀스(

)는 전송될 수 있다.The first communication node is a multiplexing parameter (

), the length of the orthogonal sequence (

), and the phase parameter (

) by applying Equation 3 to

can create The first communication node is

By applying to Equation 1, an orthogonal sequence (

) can be generated (S404). The first communication node is an orthogonal sequence (

) to the allocated frequency resources (eg,

frequency resources) to the second communication node (S405). Here, the orthogonal sequence (

) may be mapped to frequency resources based on the method shown in FIG. 3, and the mapped orthogonal sequence (

) can be transmitted.

,

,

, 및/또는

)는 규격에 미리 정의될 수 있다. 이 경우, 단계 S401, 단계 S402, 및/또는 단계 S403은 생략될 수 있다. 또는, 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)는 제1 통신 노드에 의해 설정될 수 있다. 또는, 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)는 시그널링에 의해 미리 설정될 수 있다. 시그널링은 상위계층 시그널링, MAC(medium access control) 시그널링, 및 PHY(physical) 시그널링 중에서 하나 또는 둘 이상의 조합일 수 있다. 상위계층 시그널링은 시스템 정보(예를 들어, MIB(master information block), SIB(system information block)) 및/또는 RRC(radio resource control) 메시지의 송수신 절차일 수 있다. MAC 시그널링은 MAC CE(control information)의 송수신 절차일 수 있다. PHY 시그널링은 제어 정보(예를 들어, DCI(downlink control information), UCI(uplink control information), SCI(sidelink control information))의 송수신 절차일 수 있다.The parameter(s) described above (e.g.,

,

,

, and/or

) may be predefined in the specification. In this case, steps S401, S402, and/or S403 may be omitted. Alternatively, the parameter(s) described above (e.g.,

,

,

, and/or

) may be set by the first communication node. Alternatively, the parameter(s) described above (e.g.,

,

,

, and/or

) may be preset by signaling. Signaling may be one or a combination of two or more of higher layer signaling, medium access control (MAC) signaling, and physical (PHY) signaling. Higher layer signaling may be a transmission/reception procedure of system information (eg, master information block (MIB), system information block (SIB)) and/or radio resource control (RRC) message. MAC signaling may be a procedure for transmitting and receiving MAC control information (CE). PHY signaling may be a procedure for transmitting and receiving control information (eg, downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI)).

,

,

, 및/또는

)를 시그널링을 통해 제2 통신 노드에 알려줄 수 있다. "제1 통신 노드가 단말이고, 제2 통신 노드가 기지국인 경우", 제1 통신 노드는 시그널링을 통해 제2 통신 노드로부터 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)를 획득할 수 있고, 제2 통신 노드에 의해 설정된 파라미터(들)를 사용하여 단계 S401 내지 단계 S405를 수행할 수 있다. "제1 통신 노드 및 제2 통신 노드가 서로 다른 단말들인 경우", 제1 통신 노드는 시그널링을 통해 기지국 또는 제2 통신 노드로부터 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)를 획득할 수 있고, 기지국 또는 제2 통신 노드에 의해 설정된 파라미터(들)를 사용하여 단계 S401 내지 단계 S405를 수행할 수 있다. "When the first communication node is a base station and the second communication node is a terminal", the first communication node determines the parameter (s) described above before step S405 (eg,

,

,

, and/or

) may be notified to the second communication node through signaling. "When the first communication node is a terminal and the second communication node is a base station", the first communication node transmits the above-mentioned parameter (s) (eg,

,

,

, and/or

) can be obtained, and steps S401 to S405 can be performed using the parameter(s) set by the second communication node. "When the first communication node and the second communication node are different terminals", the first communication node transmits the above-described parameter (s) (eg,

,

,

, and/or

) can be obtained, and steps S401 to S405 can be performed using the parameter(s) set by the base station or the second communication node.

"으로 정의될 수 있다.

번째 정보 비트의 값(예를 들어,

)에 대한

의 최댓값은 아래 수학식 4에 기초하여 결정될 수 있다.Next, detection methods of transmitted signals (eg, information, data) using orthogonal sequences will be described. The reception sequence for a signal transmitted using an orthogonal sequence is "

" can be defined as

The value of the th information bit (e.g.,

)for

The maximum value of may be determined based on Equation 4 below.

은 아래 수학식 5와 같이 정의될 수 있고, 수학식 4에서

는 아래 수학식 6과 같이 정의될 수 있다.in Equation 4

Can be defined as in Equation 5 below, in Equation 4

Can be defined as in Equation 6 below.

는

번째 정보 비트의 값(예를 들어,

)에 대응하는 직교 시퀀스일 수 있다.

는

의 켤레 복소수(complex conjugate)일 수 있다.

은 아래 수학식 7과 같이 정의될 수 있다.here,

Is

The value of the th information bit (e.g.,

) may be an orthogonal sequence corresponding to

Is

The conjugate of may be a complex conjugate.

Can be defined as in Equation 7 below.

의 최댓값을 이용하여

번째 정보 비트의 값이 결정될 수 있다. 수학식 4에서

은

에 비해 좁은 주파수 대역에 대한 코히런트 합계(coherent summation)일 수 있다. 따라서 주파수 선택적 페이딩(frequency selective fading) 및/또는 시간 동기 오차로 인한 지연(예를 들어, 그룹 지연)은 줄어들 수 있고, 이에 따라 신호의 검출 확률은 향상될 수 있다. 수학식 4에서

은

에 비해 넓은 주파수 대역에 대한 코히런트 합계일 수 있다. 따라서 SNR(signal-to-noise ratio)은 향상될 수 있다. 즉, 직교 시퀀스를 이용하여 신호를 송수신하는 경우, 주파수 선택적 페이딩 및/또는 시간 동기 오차에 강인할 수 있고, SNR은 향상될 수 있다.calculated by Equation 4

using the maximum value of

A value of the th information bit may be determined. in Equation 4

silver

It may be a coherent summation for a narrow frequency band compared to . Accordingly, delay (eg, group delay) due to frequency selective fading and/or time synchronization error may be reduced, and thus signal detection probability may be improved. in Equation 4

silver

It may be a coherent sum over a wide frequency band compared to . Accordingly, signal-to-noise ratio (SNR) may be improved. That is, when a signal is transmitted and received using an orthogonal sequence, it can be robust against frequency selective fading and/or time synchronization error, and SNR can be improved.

5 is a flowchart showing a first embodiment of a method for receiving signals in a communication system.

Referring to FIG. 5 , a first communication node (eg, a base station or a terminal) may transmit a signal (eg, information or data) using an orthogonal sequence defined in Equation 1. That is, the first communication node can transmit a signal by performing the steps shown in FIG. 4 . The second communication node may perform a monitoring operation to obtain from the first communication node an orthogonal sequence generated based on a plurality of information bits. The second communication node may obtain a received sequence for an orthogonal sequence by a monitoring operation. The second communication node may perform the following operations to obtain the information bit(s) from the received sequence. Here, the second communication node may be a base station or terminal (eg, UE) shown in FIG. 1 and may be configured identically or similarly to the communication node 200 shown in FIG. 2 .

)를 설정할 수 있다(S501). 제2 통신 노드는

번째 정보 비트의 값(예를 들어,

)에 대응하는 위상 파라미터(

)를 설정할 수 있다(S502). 제2 통신 노드는 다중화 파라미터(

), 직교 시퀀스의 길이(

), 및 위상 파라미터(

)를 수학식 3에 적용함으로써

를 생성할 수 있다. 제2 통신 노드는

를 수학식 1에 적용함으로써 직교 시퀀스(

)를 생성할 수 있고,

에 기초하여

을 생성할 수 있다(S503).

는

에 대한 켤레 복소수일 수 있다.The second communication node is a multiplexing parameter (

) can be set (S501). The second communication node is

The value of the th information bit (e.g.,

), the phase parameter corresponding to (

) can be set (S502). The second communication node is a multiplexing parameter (

), the length of the orthogonal sequence (

), and the phase parameter (

) by applying Equation 3 to

can create The second communication node is

By applying to Equation 1, an orthogonal sequence (

) can be generated,

based on

can be generated (S503).

Is

The conjugate for may be a complex number.

,

,

, 및/또는

)는 규격에 미리 정의될 수 있다. 이 경우, 단계 S501 및 단계 S502는 생략될 수 있다. 또는, 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)는 제2 통신 노드에 의해 설정될 수 있다. 또는, 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)는 시그널링에 의해 미리 설정될 수 있다. 시그널링은 상위계층 시그널링, MAC 시그널링, 및 PHY 시그널링 중에서 하나 또는 둘 이상의 조합일 수 있다. 예를 들어, 제2 통신 노드는 시그널링을 통해 제1 통신 노드 또는 제3 통신 노드로부터 상술한 파라미터(들)(예를 들어,

,

,

, 및/또는

)를 획득할 수 있다.The parameter(s) described above (e.g.,

,

,

, and/or

) may be predefined in the specification. In this case, steps S501 and S502 can be omitted. Or, the parameter(s) described above (e.g.,

,

,

, and/or

) may be set by the second communication node. Or, the parameter(s) described above (e.g.,

,

,

, and/or

) may be preset by signaling. Signaling may be one or a combination of two or more of higher layer signaling, MAC signaling, and PHY signaling. For example, the second communication node may transmit the above-described parameter(s) (eg,

,

,

, and/or

) can be obtained.

) 및

에 기초하여

및

를 계산할 수 있고,

및

를 수학식 4에 적용함으로써

의 최댓값을 계산할 수 있다(S504). 제2 통신 노드는

의 최댓값에 대응하는 각 정보 비트의 값을 검출할 수 있다(S505).The second communication node receives the sequence (

) and

based on

and

can be calculated,

and

By applying to Equation 4

The maximum value of can be calculated (S504). The second communication node is

It is possible to detect the value of each information bit corresponding to the maximum value of (S505).

개의 정보 비트들의 송신 및 검출 방법들일 수 있다. 다른 실시예로, 1개의 정보 비트가 상술한 방법(예를 들어, 도 4 및 도 5에 도시된 방법들)에 기초하여 반복 전송되는 경우, 수신 신호의 검출 성능은 향상될 수 있다. 제1 통신 노드는 1개의 정보 비트를

번 반복함으로써

정보 비트들을 생성할 수 있다. "정보 비트의 값이 0이고,

이 2인 경우", "00"이 생성될 수 있다. 제1 통신 노드는 도 4에 도시된 방법에 기초하여 "00"에 대한 직교 시퀀스를 전송할 수 있다. 제2 통신 노드는 도 5에 도시된 방법에 기초하여 "00"에 대한 직교 시퀀스의 검출 동작을 수행할 수 있다.The above methods are different

transmission and detection methods of n information bits. As another embodiment, when one information bit is repeatedly transmitted based on the above-described method (eg, the methods shown in FIGS. 4 and 5), detection performance of a received signal may be improved. The first communication node sends one information bit

by repeating

It can generate information bits. "The value of the information bit is 0,

is 2”, “00” can be generated. The first communication node can transmit an orthogonal sequence for “00” based on the method shown in FIG. 4. The second communication node is shown in FIG. Based on the described method, an orthogonal sequence detection operation for “00” may be performed.

이 2인 경우", "11"이 생성될 수 있다. 제1 통신 노드는 도 4에 도시된 방법에 기초하여 "11"에 대한 직교 시퀀스를 전송할 수 있다. 제2 통신 노드는 도 5에 도시된 방법에 기초하여 "11"에 대한 직교 시퀀스의 검출 동작을 수행할 수 있다. 반복된 정보 비트들의 직교 시퀀스가 송신되는 경우에도, 주파수 선택적 페이딩 및/또는 시간 동기 오차에 강인할 수 있고, SNR은 향상될 수 있다."The value of the information bit is 1,

is 2”, “11” may be generated. The first communication node may transmit an orthogonal sequence for “11” based on the method shown in FIG. 4. The second communication node is shown in FIG. Based on the described method, it is possible to perform a detection operation of an orthogonal sequence for “11.” Even when an orthogonal sequence of repeated information bits is transmitted, it can be robust to frequency selective fading and/or time synchronization error, and SNR can be improved.

The methods according to the present invention may be implemented in the form of program instructions that can be executed by 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 present invention or may be known and usable to those skilled in computer software.

Examples of computer readable media include hardware devices specially configured to store and execute program instructions, such as 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 or the like as well as machine language codes generated by a compiler. The hardware device described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

Although described with reference to the above embodiments, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the present invention described in the claims below. You will be able to.

Claims (20)

As a method of operating a first communication node in a communication system,
setting a first parameter for multiplexing a plurality of information bits;
setting the length of an orthogonal sequence corresponding to each of the plurality of information bits;
setting a second parameter indicating phase information corresponding to each of the plurality of information bits;
generating orthogonal sequences of the plurality of information bits based on the first parameter, the second parameter, and the length of the orthogonal sequence; and
and transmitting the orthogonal sequences to a second communication node using radio resources. The method of claim 1,
Each of the orthogonal sequences is generated based on the equation below,

,

Among the plurality of information bits

The orthogonal sequence of the th information bit,

said

Determined based on the first parameter, the second parameter, and the length of the orthogonal sequence for the th information bit,

said

The length of the orthogonal sequence of the th information bit, the operating method of the first communication node. The method of claim 2,
remind

When the value of the th information bit is 0, the value of the second parameter may be 0,

When the value of the th information bit is 1, the value of the second parameter is

In, the operation method of the first communication node. The method of claim 2,

is generated based on the equation below,

,

is the first parameter,

Is the second parameter, the operating method of the first communication node. The method of claim 1,
The sum of the lengths of the orthogonal sequences is a length corresponding to the number of frequency resources constituting the radio resources, the operating method of the first communication node. The method of claim 1,
The length of the orthogonal sequences is set to be the same, the operating method of the first communication node. The method of claim 1,
At least one of the first parameter, the second parameter, and information indicating the length of the orthogonal sequence is signaled to the second communication node. The method of claim 1,
The plurality of information bits is one information bit

repeated times

Information bits, a method of operation of a first communication node. The method of claim 1,
The step of transmitting to the second communication node,
mapping a first orthogonal sequence of a first information bit among the plurality of information bits from a lowest frequency resource;
sequentially mapping orthogonal sequences other than the first orthogonal sequence among the orthogonal sequences to remaining frequency resources; and
A method of operation of a first communication node comprising transmitting mapped orthogonal sequences. As a method of operating a second communication node in a communication system,
performing a monitoring operation to obtain from the first communication node orthogonal sequences generated based on the plurality of information bits;
obtaining received sequences for the orthogonal sequences by the monitoring operation;
generating complex conjugates for the orthogonal sequences based on parameters used for generation of the orthogonal sequences; and
and detecting a value of each of the plurality of information bits corresponding to a specific value calculated based on the received sequences and the complex conjugate numbers. The method of claim 10,
The receiving sequences are

ego,

is the number of frequency resources from which the orthogonal sequences are received. The method of claim 10,
The parameters include a first parameter for multiplexing the plurality of information bits, a second parameter indicating phase information corresponding to each of the plurality of information bits, and a third parameter indicating the length of each of the orthogonal sequences. To, the operation method of the second communication node. The method of claim 12,
Each of the orthogonal sequences is generated based on the equation below,

,

Among the plurality of information bits

is an orthogonal sequence of th information bits,

Is the first parameter, the second parameter, and

is determined based on

said

The third parameter indicating the length of the orthogonal sequence of the th information bit, and the complex conjugates of the orthogonal sequences are

In, the operation method of the second communication node. The method of claim 10,
The specific value is calculated based on the formula below,

,

is the specific value,

and

Each is determined by the equation below,

or

or

is the number of the plurality of information bits,

Among the plurality of information bits

is the length of the orthogonal sequence of the th information bit,

are the received sequences,

is the conjugate complex numbers for the orthogonal sequences. The method of claim 10,
The plurality of information bits is one information bit

repeated times

Information bits, a method of operation of a second communication node. As a first communication node,
processor;
a memory that communicates electronically with the processor; and
Includes instructions stored in the memory;
When the instructions are executed by the processor, the instructions cause the first communication node to:
set a first parameter for multiplexing the plurality of information bits;
set the length of an orthogonal sequence corresponding to each of the plurality of information bits;
set a second parameter indicating phase information corresponding to each of the plurality of information bits;
generate orthogonal sequences of the plurality of information bits based on the first parameter, the second parameter, and the length of the orthogonal sequence; and
A first communication node operative to transmit the orthogonal sequences to a second communication node using radio resources. The method of claim 16
Each of the orthogonal sequences is generated based on the equation below,

,

Among the plurality of information bits

The orthogonal sequence of the th information bit,

said

Determined based on the first parameter, the second parameter, and the length of the orthogonal sequence for the th information bit,

said

is the length of the orthogonal sequence of th information bits. The method of claim 17

is generated based on the equation below,

,

is the first parameter,

is the second parameter, the first communication node. The method of claim 16
At least one of the first parameter, the second parameter, and information indicating the length of the orthogonal sequence is set by the second communication node. The method of claim 16
When transmitting the orthogonal sequences to the second communication node using radio resources, the instructions include:
mapping a first orthogonal sequence of a first information bit among the plurality of information bits from a lowest frequency resource;
sequentially mapping orthogonal sequences other than the first orthogonal sequence among the orthogonal sequences to remaining frequency resources; and
The first communication node, further executed to transmit the mapped orthogonal sequences.

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