WO2018062840A1 - Method by which terminal and base station transmit/receive signals in wireless communication system, and device for supporting same - Google Patents

Abstract

Disclosed are a method by which a terminal and a base station transmit/receive signals, and a device for supporting the same. More specifically, disclosed are: a method by which a base station or a terminal transmits/receives a control channel and a data channel having independent numerology (for example, subcarrier spacing) to/from each other; and a device for supporting the same.

Description

Signal transmission and reception method of a terminal and a base station in a wireless communication system and an apparatus supporting the same

The following description relates to a wireless communication system, and a method for transmitting and receiving a signal between a terminal and a base station in a wireless communication system and an apparatus supporting the same.

More specifically, the following description includes a description of a method for transmitting and receiving a control channel and a data channel having a base station or a terminal having independent numerology (eg, subcarrier spacing) and a device supporting the same. do.

Wireless access systems are widely deployed to provide various kinds of communication services such as voice and data. In general, a wireless access system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA). division multiple access) system.

In addition, as more communication devices require larger communication capacities, there is a need for improved mobile broadband communication as compared to conventional radio access technology (RAT). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere, is also being considered in next-generation communications. In addition, a communication system design considering a service / UE that is sensitive to reliability and latency is being considered.

The introduction of the next generation of RAT considering the improved mobile broadband communication, Massif MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is being discussed.

An object of the present invention is to provide a method for transmitting and receiving signals between a terminal and a base station and a device supporting the same in a newly proposed communication system.

In particular, it is an object of the present invention to provide a method for transmitting and receiving a signal between a terminal and a base station and a device supporting the same that satisfy various service requirements and ensure stable operation in a wide frequency band in a newly proposed communication system.

Technical objects to be achieved in the present invention are not limited to the above-mentioned matters, and other technical problems not mentioned above are provided to those skilled in the art from the embodiments of the present invention to be described below. May be considered.

The present invention provides methods and apparatuses for transmitting and receiving signals between a base station and a terminal in a wireless communication system. In particular, the present invention provides a method and apparatus for transmitting and receiving a control channel and a data channel to which the independent numerology (eg, subcarrier spacing) is applied in transmitting and receiving a signal between the terminal and the base station.

In one aspect of the present invention, a method for transmitting and receiving a signal in a terminal in a wireless communication system, the method comprising: receiving a downlink control channel having a first numerology; And performing a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and independently determined by the first numerology. Suggest.

In another aspect of the present invention, a method for transmitting and receiving a signal of a base station in a wireless communication system, the method comprising: transmitting a downlink control channel having a first numerology; And performing a downlink data channel transmission or an uplink data channel reception having a second numerology independently determined from the first numerology based on the scheduling indicated by the downlink control channel. We propose a signal transmission and reception method.

In still another aspect of the present invention, a terminal for transmitting and receiving a signal with a base station in a wireless communication system, comprising: a transmitter; Receiving unit; And a processor operatively coupled to the transmitter and the receiver, the processor comprising: receiving a downlink control channel having a first numerology; And performing a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and independently determined by the first numerology.

In still another aspect of the present invention, a base station for transmitting and receiving a signal with a terminal in a wireless communication system, the base station; Receiving unit; And a processor operating in connection with the transmitter and the receiver, the processor comprising: transmitting a downlink control channel having a first numerology; And perform a downlink data channel transmission or an uplink data channel reception having a second numerology independently determined from the first numerology based on the scheduling indicated by the downlink control channel. do.

In this case, when the downlink control channel schedules transmission of the downlink data channel, the first numerology of the downlink control channel and the second numerology of the downlink data channel may be different from each other.

In addition, when the downlink control channel schedules transmission of the downlink data channel, the terminal may transmit acknowledgment information for the downlink data channel to the base station. In this case, the transmission time of the acknowledgment information may be determined based on the third numerology of the uplink control channel.

In addition, when the downlink control channel schedules reception of the uplink data channel, the first numerology of the downlink control channel and the second numerology of the uplink data channel may be different from each other.

In this case, a time length between the time point at which the downlink control channel is received and the time point at which the uplink data channel is transmitted may be determined based on the second numerology.

Here, a physical downlink control channel (PDCCH) is applied to the downlink control channel, a physical downlink shared channel (PDSCH) is applied to the downlink data channel, and a physical uplink shared channel (PUSCH) is applied to the uplink data channel. Can be.

In the present invention, the first numerology may be set through higher layer signaling, and the second numerology may be set through higher layer signaling or physical layer signaling according to a data channel scheduled by the downlink control channel.

The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be described in detail by those skilled in the art. Based on the description, it can be derived and understood.

According to embodiments of the present invention has the following effects.

According to the present invention, in a newly proposed wireless communication system, a terminal and a base station may satisfy various service requirements, ensure stable operation in a wide frequency band, and transmit and receive signals.

Effects obtained in the embodiments of the present invention are not limited to the above-mentioned effects, and other effects not mentioned above are commonly known in the art to which the present invention pertains from the description of the embodiments of the present invention. Can be clearly derived and understood by those who have In other words, unintended effects of practicing the present invention may also be derived by those skilled in the art from the embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to facilitate understanding of the present invention, and provide embodiments of the present invention together with the detailed description. However, the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment. Reference numerals in each drawing refer to structural elements.

1 is a diagram illustrating a physical channel and a signal transmission method using the same.

2 is a diagram illustrating an example of a structure of a radio frame.

3 is a diagram illustrating a resource grid for a downlink slot.

4 is a diagram illustrating an example of a structure of an uplink subframe.

5 is a diagram illustrating an example of a structure of a downlink subframe.

FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.

7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element.

9 is a diagram illustrating a configuration in which a subcarrier spacing for a DL use and a subcarrier spacing for a UL use are different from each other according to an example of the present invention.

FIG. 10 illustrates a configuration in which each region of DL / UL / GP in a corresponding TTI is set through a combination of an indication indicating a DL region and an indication indicating a UL region for different TTIs according to an embodiment of the present invention. The figure shown.

FIG. 11 is a diagram schematically illustrating a frame structure to which asymmetric numerology is applied according to an embodiment of the present invention.

12 is a diagram illustrating a configuration in which DL TTI and UL TTI are set differently according to an embodiment of the present invention.

13 is a view showing a signal transmission and reception method between the terminal and the base station according to the present invention.

14 is a diagram illustrating a configuration of a terminal and a base station in which the proposed embodiments can be implemented.

The following embodiments combine the components and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, some of the components and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment.

In the description of the drawings, procedures or steps which may obscure the gist of the present invention are not described, and procedures or steps that can be understood by those skilled in the art are not described.

Throughout the specification, when a part is said to "comprising" (or including) a component, this means that it may further include other components, except to exclude other components unless specifically stated otherwise. do. In addition, the terms "... unit", "... group", "module", etc. described in the specification mean a unit for processing at least one function or operation, which is hardware or software or a combination of hardware and software. It can be implemented as. Also, "a or an", "one", "the", and the like are used differently in the context of describing the present invention (particularly in the context of the following claims). Unless otherwise indicated or clearly contradicted by context, it may be used in the sense including both the singular and the plural.

In the present specification, embodiments of the present invention have been described based on data transmission / reception relations between a base station and a mobile station. Here, the base station is meant as a terminal node of a network that directly communicates with a mobile station. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station. In this case, the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.

Further, in embodiments of the present invention, a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), or a mobile subscriber station (MSS). It may be replaced with terms such as a mobile terminal or an advanced mobile station (AMS).

Also, the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service, and the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems, and in particular, the present invention. Embodiments of the may be supported by 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321 and 3GPP TS 36.331 documents. That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.

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

In addition, specific terms used in the embodiments of the present invention are provided to help the understanding of the present invention, and the use of the specific terms may be changed into other forms without departing from the technical spirit of the present invention. .

For example, the term Transmission Opportunity Period (TxOP) may be used in the same meaning as the term transmission period, transmission burst (Tx burst) or RRP (Reserved Resource Period). Also, the LBT process may be performed for the same purpose as a carrier sensing process, a clear channel access (CCA), and a channel access procedure (CAP) for determining whether a channel state is idle.

Hereinafter, a 3GPP LTE / LTE-A system will be described as an example of a wireless access system in which embodiments of the present invention can be used.

The following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be applied to various radio access systems.

CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).

UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. The LTE-A (Advanced) system is an improved system of the 3GPP LTE system. In order to clarify the description of the technical features of the present invention, embodiments of the present invention will be described based on the 3GPP LTE / LTE-A system, but can also be applied to IEEE 802.16e / m system and the like.

1.3GPP LTE Of LTE _A system

1.1 Physical Channels and Signal Transmission / Reception Method Using the Same

In a wireless access system, a terminal receives information from a base station through downlink (DL) and transmits information to the base station through uplink (UL). The information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information they transmit and receive.

1 is a diagram for explaining physical channels that can be used in embodiments of the present invention and a signal transmission method using the same.

When the power is turned off again or a new cell enters the cell, the initial cell search operation such as synchronizing with the base station is performed in step S11. To this end, the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.

Thereafter, the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information in a cell.

On the other hand, the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to confirm the downlink channel state.

After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S12. Specific system information can be obtained.

Subsequently, the terminal may perform a random access procedure as in steps S13 to S16 to complete the access to the base station. To this end, the UE transmits a preamble through a physical random access channel (PRACH) (S13), a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S14). In case of contention-based random access, the UE may perform contention resolution such as transmitting an additional physical random access channel signal (S15) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S16). Procedure).

After performing the above-described procedure, the UE subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S17) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure. A transmission (Uplink Shared Channel) signal and / or a Physical Uplink Control Channel (PUCCH) signal may be transmitted (S18).

The control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK (HARQ-ACK / NACK), Scheduling Request (SR), Channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI) information. .

In the LTE system, UCI is generally transmitted periodically through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time. In addition, the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.

1.2. Resource structure

2 shows a structure of a radio frame used in embodiments of the present invention.

2 (a) shows a frame structure type 1. The type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) systems and half duplex FDD systems.

One radio frame is T _f = 307200 * T _s It has a length of 10 ms, T _slot = 15360 * T _s = 0.5 ms, and has an equal length of 20 slots indexed from 0 to 19. One subframe is defined as two consecutive slots, and the i-th subframe includes slots corresponding to 2i and 2i + 1. That is, a radio frame consists of 10 subframes. The time taken to transmit one subframe is called a transmission time interval (TTI). Here, T _s represents a sampling time and is represented by T _s = 1 / (15 kHz x 2048) = 3.2552 x 10 ^-8 (about 33 ns). The slot includes a plurality of OFDM symbols or SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.

One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Since 3GPP LTE uses OFDMA in downlink, the OFDM symbol is for representing one symbol period. The OFDM symbol may be referred to as one SC-FDMA symbol or symbol period. A resource block is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.

In a full-duplex FDD system, 10 subframes may be used simultaneously for downlink transmission and uplink transmission during each 10ms period. At this time, uplink and downlink transmission are separated in the frequency domain. On the other hand, in the case of a half-duplex FDD system, the terminal cannot transmit and receive at the same time.

The structure of the radio frame described above is just one example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.

2 (b) shows a frame structure type 2. Type 2 frame structure is applied to the TDD system. One radio frame is T _f = 307200 * T _s = having a length of 10ms and is composed of 153600 * T _s = 2 two half-frames (half-frame) having a 5ms length. Each half frame consists of five subframes having a length of 30720 * T _s = 1 ms. The i th subframe consists of two slots having a length of T _slot = 15360 * T _s = 0.5 ms corresponding to 2 _i and 2 _{i +1} . Here, T _s represents a sampling time and is represented by T _s = 1 / (15 kHz x 2048) = 3.2552 x 10 ^-8 (about 33 ns).

The type 2 frame includes a special subframe consisting of three fields: a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). Here, the DwPTS is used for initial cell search, synchronization or channel estimation in the terminal. UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal. The guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.

Table 1 below shows the structure of the special frame (length of DwPTS / GP / UpPTS).

3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.

Referring to FIG. 3, one downlink slot includes a plurality of OFDM symbols in the time domain. Here, one downlink slot includes seven OFDM symbols, and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.

Each element on the resource grid is a resource element, and one resource block includes 12 × 7 resource elements. The number NDL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth. The structure of the uplink slot may be the same as the structure of the downlink slot.

4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.

Referring to FIG. 4, an uplink subframe may be divided into a control region and a data region in the frequency domain. The control region is allocated a PUCCH carrying uplink control information. In the data area, a PUSCH carrying user data is allocated. In order to maintain a single carrier characteristic, one UE does not simultaneously transmit a PUCCH and a PUSCH. The PUCCH for one UE is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots. The RB pair assigned to this PUCCH is said to be frequency hopping at the slot boundary.

5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.

Referring to FIG. 5, up to three OFDM symbols from the OFDM symbol index 0 in the first slot in the subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which the PDSCH is allocated. to be. One example of a downlink control channel used in 3GPP LTE includes a Physical Control Format Indicator Channel (PCFICH), a PDCCH, and a Physical Hybrid-ARQ Indicator Channel (PHICH).

The PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels within the subframe. The PHICH is a response channel for the uplink and carries an ACK (Acknowledgement) / NACK (Negative-Acknowledgement) signal for a hybrid automatic repeat request (HARQ). Control information transmitted through the PDCCH is called downlink control information (DCI). The downlink control information includes uplink resource allocation information, downlink resource allocation information or an uplink transmission (Tx) power control command for a certain terminal group.

2. New wireless access technology ( New Radio Access Technology ) system

As more communication devices require larger communication capacities, there is a need for improved mobile broadband communication compared to conventional radio access technology (RAT). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere, is also being considered. In addition, communication system design considering services / UEs that are sensitive to reliability and latency is also discussed.

The introduction of new wireless access technology in consideration of such enhanced mobile broadband communication, Massive MTC, Ultra-Reliable and Low Latency Communication (URLLC), and the like are discussed. Called NR (New Radio).

2.1. Self-contained structure subframe  structure)

FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.

In the NR system to which the present invention is applicable, an independent subframe structure as shown in FIG. 6 is proposed to minimize data transmission delay in a TDD system.

In FIG. 6, a hatched area (eg, symbol index = 0) represents a downlink control area, and a black area (eg, symbol index = 13) represents an uplink control area. The other area (eg, symbol index = 1 to 12) may be used for downlink data transmission or may be used for uplink data transmission.

The feature of this structure is to sequentially perform DL transmission and UL transmission in one subframe, and can also transmit and receive DL data and UL ACK / NACK for this in one subframe. As a result, this structure reduces the time taken to retransmit data in the event of a data transmission error, thereby minimizing the delay of the final data transfer.

In this self-contained subframe structure, a time gap is required for a base station and a UE to switch from a transmission mode to a reception mode or to switch from a reception mode to a transmission mode. To this end, some OFDM symbols at the time of switching from DL to UL in an independent subframe structure may be set to a guard period (GP).

In the foregoing detailed description, the self-contained subframe structure includes a case in which both the DL control region and the UL control region are included. However, the control regions may be selectively included in the independent subframe structure. In other words, the independent subframe structure according to the present invention may include not only a case in which both the DL control region and the UL control region are included as shown in FIG. 6, but also a case in which only the DL control region or the UL control region is included.

In addition, for convenience of description, the above-described frame structure is collectively referred to as a subframe, but a corresponding configuration may be named as a frame or a slot. For example, in an NR system, one unit composed of a plurality of symbols may be called a slot, and in the following description, a subframe or a frame may be replaced with the slot described above.

2.2. OFDM numerology  (numerology)

The NR system uses an OFDM transmission scheme or a similar transmission scheme. In this case, the NR system may have an OFDM numerology as shown in Table 2.

Alternatively, the NR system uses an OFDM transmission scheme or a similar transmission scheme and may use an OFDM numerology selected from a plurality of OFDM numerologies as shown in Table 3. Specifically, as disclosed in Table 3, the NR system is based on the 15kHz subcarrier spacing used in the LTE system (OF subcarrier spacing) OFDM numerology with 30, 60, 120 kHz subcarrier spacing in a multiple of the 15kHz subcarrier spacing Can be used.

In this case, the cyclic prefix, the system bandwidth (System BW), and the number of available subcarriers available in Table 3 are just examples applicable to the NR system according to the present invention. Values can be modified. Representatively, in case of 60kHz subcarrier spacing, the system bandwidth may be set to 100MHz, and in this case, the number of available subcarriers may exceed 1500 and have a value less than 1666. In addition, the subframe length and the number of OFDM symbols per subframe disclosed in Table 4 are also just examples applicable to the NR system according to the present invention, and the values may be modified according to an implementation scheme.

2.3. analog Beamforming  (Analog beamforming )

In millimeter wave (mmW), the short wavelength allows the installation of multiple antenna elements in the same area. That is, since the wavelength is 1 cm in the 30 GHz band, a total of 100 antenna elements can be installed in a 2-dimension array at 0.5 lambda intervals on a 5 * 5 cm panel. Accordingly, in millimeter wave (mmW), a plurality of antenna elements may be used to increase beamforming (BF) gain to increase coverage or to increase throughput.

In this case, each antenna element may include a TXRU (Transceiver Unit) to enable transmission power and phase adjustment for each antenna element. Through this, each antenna element may perform independent beamforming for each frequency resource.

However, in order to install TXRU in all 100 antenna elements, there is a problem in terms of cost effectiveness. Therefore, a method of mapping a plurality of antenna elements to a single TXRU and adjusting a beam direction with an analog phase shifter is considered. This analog beamforming method has a disadvantage in that frequency selective beamforming is difficult because only one beam direction can be made in the entire band.

As a solution to this, hybrid beamforming having B TXRUs, which is smaller than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming. In this case, although there are differences depending on the connection scheme of the B TXRU and the Q antenna elements, the direction of the beam that can be transmitted at the same time may be limited to B or less.

7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element. Here, the TXRU virtualization model represents the relationship between the output signal of the TXRU and the output signal of the antenna element.

FIG. 7 is a diagram illustrating how a TXRU is connected to a sub-array. In the case of FIG. 7, the antenna element is connected to only one TXRU.

8 shows how TXRU is connected to all antenna elements. In the case of FIG. 8, the antenna element is connected to all TXRUs. At this time, the antenna element requires a separate adder as shown in FIG. 15 to be connected to all TXRUs.

In Figures 7 and 8, W represents the phase vector multiplied by an analog phase shifter. In other words, W is a main parameter that determines the direction of analog beamforming. Here, the mapping between the CSI-RS antenna port and the TXRUs may be 1: 1 or 1: 1-to-many.

According to the configuration of FIG. 7, the beamforming focusing is difficult, but there is an advantage that the entire antenna configuration can be configured at a low cost.

According to the configuration of FIG. 8, there is an advantage in that focusing of the beamforming is easy. However, since the TXRU is connected to all antenna elements, the overall cost increases.

3. offered Example

Based on the above technical features, in the following NR system applicable to the present invention, the transmission time interval (TTI) or subcarrier spacing between the DL signal and the UL signal is different, or a control channel and data The frame structure and control / data channel transmission / reception methods when subcarrier spacing between data channels are different will be described in detail.

In a conventional LTE system, a transmission time interval (TTI) is defined as a minimum time interval for delivering MAC protocol data units (PDUs) to a PHY layer in a medium access control (MAC) layer. Accordingly, since the UE may receive DL data or receive UL data transmission at a TTI interval, the UE should attempt to receive a DL control channel carrying DL data or scheduling information for at least TTI. In particular, until the LTE release-13 system, the TTI was defined equal to 1 subframe (SF), that is, 1 ms.

However, it has begun to discuss that TTIs of various sizes can be applied in NR systems to which the present invention is applicable. (Note that the introduction of TTI, defined in a time domain less than 1 ms (eg 7 symbols or 2 symbols), is also discussed in systems after the LTE Release-14 system discussed at a similar time as the NR system. Different UEs have different coverages, different traffic volumes, or use cases (eg, Enhanced Mobile BroadBand (eMBB) or Ultra Reliable and Low Latency Communication (URLLC), etc.) This is because the requirements may vary.

In addition, in the NR system to which the present invention is applicable, the introduction of several subcarrier spacings is considered to satisfy various service requirements and to ensure stable operation in a wide frequency band.

Accordingly, the present invention will be described in detail with reference to a frame structure and a control / data channel transmission / reception method when the TTI or subcarrier spacing between the DL signal and the UL signal is different or the subcarrier spacing between the control channel and the data channel is different.

3.1. Asymmetric subcarrier spacing

3.1.1. summary

Cyclic Prefix (CP) may be needed to reduce inter-symbol interference from the viewpoint of an eNB that simultaneously receives UL transmissions of different UEs (using frequency resources or spatial resources). However, in the CP required for DL reception and the CP required for UL transmission, when considering uncertainty such as adjusting a TA (Timing Advance) value, the UL required CP transmission for the UL transmission is longer than the CP required for the DL reception. You may need a CP for.

As a first example for this, the same subcarrier spacing may be applied, but a normal CP may be supported for DL and an extended CP may be supported for UL.

Alternatively, in a second example for this, the CP length is set to be the same, but the subcarrier spacing for DL use may be set larger than the subcarrier spacing for UL use.

In this case, the second example described above may be more preferable in terms of general CP overhead.

In addition, the subcarrier spacing of the control channel may be set larger than the subcarrier spacing of the data channel. In the case of the control channel, the maximum modulation and coding scheme (MCS) is set to be considerably lower than that of the data channel, so that even if the subcarrier spacing and the CP length of the control channel are increased, a certain level of reliability can still be guaranteed in an interference situation. . In addition, in the case of applying analog beamforming for signal transmission, the above configuration has an advantage in that the control channel can be transmitted in various directions by increasing the number of symbols of the control channel.

Alternatively, as a method of reducing RS overhead for compensating phase noise of a data channel on a time axis with respect to a subcarrier spacing of a control channel, the subcarrier spacing for the control channel may be set to be larger than the subcarrier spacing of the data channel. Can be.

Alternatively, according to an embodiment, the subcarrier spacing of the control channel may be set smaller than the subcarrier spacing of the data channel. In this case, unlike the example described above, the symbol length of the control channel may be set longer than the symbol length of the data channel. Thus, the control channel can be transmitted using a higher transmission energy than the data channel. According to such a configuration, the base station can extend cell coverage, and the control channel can be transmitted more stably and reliably than the data channel.

9 is a diagram illustrating a configuration in which a subcarrier spacing for a DL use and a subcarrier spacing for a UL use are different from each other according to an example of the present invention.

As shown in FIG. 9, a subcarrier spacing (eg, 30 kHz) for DL use may be set larger than a subcarrier spacing (eg, 15 kHz) for UL use within the same TTI. In addition, the subcarrier spacing (eg, 30 kHz) of the control channel may be set to be larger than the subcarrier spacing (eg, 15 kHz) of the data channel.

3.1.2. How to set the start point and section of GP (Guard Period)

As shown in FIG. 9, even in the same length TTI interval, there are 14 symbols according to 15 kHz subcarrier spacing numerology and 28 symbols according to 30 kHz subcarrier spacing numerology. . In this case, as shown in FIG. 9, a guard period (GP) may exist between the DL (control) region and the UL (data) region.

Hereinafter, a method of setting the start point and the section of the GP will be described in detail. Or, a method of setting the start point and the section of the GP will be described in detail.

3.1.2.1. First starting point and section setting method

A reference numerology (eg, subcarrier spacing) that sets the starting point (and / or interval) of a specific GP may be set based on the numerology of the DL (control) region (or UL (data) region). Alternatively, the reference numerology for setting the starting point (and / or interval) of the specific GP is set based on the numerology having the maximum (or minimum) subcarrier spacing among the numerology of the DL (control) region and the numerology of the UL (data) region. Can be. Alternatively, the reference numerology for setting the starting point (and / or interval) of the specific GP may be set in advance or the reference numerology set by higher layer signaling or first layer signaling.

For example, in FIG. 9, the start point (and / or interval) of the GP is set based on the subcarrier spacing of the DL control region, which means that the candidate for the start point of the GP may be one of 28 symbols. The interval of the GP may also be set based on granularity of the symbol unit corresponding to the 30 kHz subcarrier spacing.

The above method can be equally applied to the case of setting a start point / section of a GP that can exist between the DL data region and the UL control region. In addition, the method is based on the reference numerology when the DL assignment (or UL grant) scheduling the DL data (or UL data) informs the start and / or interval and / or end point information of the data The same applies to the case of setting.

FIG. 10 illustrates a configuration in which each region of DL / UL / GP in a corresponding TTI is set through a combination of an indication indicating a DL region and an indication indicating a UL region for different TTIs according to an embodiment of the present invention. The figure shown.

As shown in FIG. 10, an indication (or DL scheduling information) indicating a DL region for one TTI (or scheduling unit or mini-slot or slot or subframe). And areas of DL / UL / GP (guard period) within a corresponding TTI may be configured through a combination of an indication (or DL scheduling information) indicating an UL area.

In this case, the indication may be set semi-statically or dynamically by dynamic first layer signaling (eg, L1 signaling).

In this case, an area corresponding to the difference (T1 or T3) between the last time point of the DL area and the start time point of the UL area may be set to GP. Alternatively, an area corresponding to the difference (T2 or T4) between the last time point of the UL area and the DL start time point on the next TTI may be set to GP.

Both the first starting point and the section setting method described above may be applied to both types of GP. In particular, the reference numerology (e.g. subcarrier spacing) that sets the starting point (and / or interval) of the GP corresponding to the difference (T2 or T4) between the end of the UL region and the DL starting point on the next TTI is the numerology of the UL region. It may be set based on.

3.1.2.2. Second start point and section setting method

If a GP exists between the DL control region and the UL data region, the starting point of the GP may be determined as a relative position with respect to the starting point of the UL data. In this case, the start time of the UL data may be signaled in advance by a UL grant (or higher layer signaling) before the corresponding UL data is transmitted (for example, before 4 TTIs).

For example, in FIG. 9, when a start position of UL data is indicated as symbol 3 based on 15 kHz (subcarrier spacing for UL data), the UE may perform a DL to UL switching time (DL-to) based on the symbol 3 boundary. The starting point of the GP section can be inverted considering the UL switching time and the TA value.

In addition, in case of a UE that recognizes a start point of a GP interval as a symbol 1 boundary, the UE may attempt to detect DL control only at symbol 0. In other words, the GP region setting may be given priority over DL control region signaling (eg, PCFICH).

The above method can be extended even when the numerology between DL / UL or control / data is the same.

In addition, when a GP exists between the DL control region and the UL data region, the GP (eg, DL-to-UL switching time and TA value, etc.) after the last point of the DL control region is considered in consideration of a higher importance of the DL control region. The UL data transmission may be set to start afterward. At this time, as the most conservative approach, a rule for determining the sum of the maximum length of the DL control and the GP (section) length as a UL data transmission start time may be set.

Alternatively, as a scheme for efficiently utilizing the UL data region in consideration of the variable DL control region, a rule for determining the sum of the minimum length of the DL control and the GP (section) length as a UL data transmission start time may be set. . In this case, if the length of the DL control region is greater than the minimum length, the sum of the last time point and the GP (section) length of the DL control area may be after the UL data transmission start time, such that the DL control area and / or the GP period. Puncturing (or rate matching) may be set to be applied to the UL data portion overlapping with.

In this case, when a DM-RS (Demodulation Reference Signal) is transmitted in the first symbol of the UL data region, the corresponding DM-RS may be punctured. Accordingly, as a way to prevent the DM-RS from being punctured, the position of the DM-RS is the nearest symbol (or later symbol) after the time point corresponding to the sum of the maximum length of the DL control region and the GP (section) length. It can be set to.

Or, if the UL data transmission start time is indicated, the sum of the last time point and the GP (section) length of the DL control region may be after the start time of the signaled UL data transmission. In this case, puncturing (or rate matching) may be applied to the UL data portion overlapping the DL control region and / or the GP interval.

In the above case, if the DM-RS is transmitted in the first symbol of the UL data area, the corresponding DM-RS can be punctured, and the position of the DM-RS is determined by the maximum length of the DL control area and the GP (section) length. It may be set to the nearest symbol (or later symbol) after the time point corresponding to the sum.

The above method can be extended even when the numerology between DL / UL or control / data is the same.

3.1.2.3. 3rd starting point and section setting method

When a GP exists between the DL data region and the UL control region, the start point and the interval of the GP may be determined by the end point of the DL data region and / or the start point of the UL control region.

More specifically, when a scheduling of DL data and an end point of the DL data are instructed for a specific TTI, the UE may regard the end point of the DL data as a start point of the GP.

Or, if the UE is instructed to transmit the UL control region and / or start time of the UL control region with respect to a specific TTI, the UE considers a DL-to-UL switching time and a TA value, etc. To invert the starting point of the GP section. In this case, when the start point of the inverted GP section is earlier than the end point of the DL data region, a rule may be set such that the UE does not receive DL data from the start point of the inverted GP section.

The above method can be extended even when the numerology between DL / UL or control / data is the same.

3.1.2.4. 4th start point and section setting method

The GP may also exist in the region between the DL data region and the UL data region or in the region between the DL control region and the UL control region. In this case, the start point (and section) of the GP is the end point of the preceding (data / control) area or the trailing (data / control) area as in the above-described second or third start point and section setting method. It may be set to be determined based on the starting time point. In this case, the region used as a reference for determining the GP interval may be determined by higher layer signaling or dynamic signaling.

According to this method, when the DL data is scheduled, the DL data area may be guaranteed and the GP period may be set. When UL data is scheduled, the UL data area may be guaranteed and the GP period may be set.

3.1.3. How to set up asymmetric numerology

Hereinafter, a method of asymmetrically setting the numerology (eg, subcarrier spacing) of the DL / UL channel or the data / control channel will be described in detail.

In general, the numerology of the DL control channel must be set at least in advance so that initial access or the like of the UE can be performed smoothly. Accordingly, the numerology of the DL control channel may be predefined according to the frequency band, set equal to the numerology of the synchronization signal, or set by MIB or SIB or RRC signaling. The numerology of the DL data channel is then set equal to the numerology of the established DL control channel, or predefined according to the frequency band of the DL data channel, or equally set to the numerology of the synchronization signal, MIB or SIB or RRC signaling. Or the like.

In contrast, the numerology of the UL control channel may be set similarly to the numerology of the DL data channel, but may be dynamically indicated by DCI (eg, DL assignment) or the like. Similarly, the numerology of the UL data channel may be set similarly to the numerology of the DL data channel, but may be dynamically indicated by DCI (eg, UL grant) or the like.

Additionally, the numerology of the UL control channel may be set differently depending on the symbol position and / or transmission format in which the UL control channel is transmitted. For example, when a UL control channel is transmitted in the last symbol, a 30 kHz subcarrier spacing may be set for the UL control channel, and in another case, a 15 kHz subcarrier spacing may be set for the UL control channel. As another example, when the UL control channel is transmitted in the form of a single symbol PUCCH, a 30 kHz subcarrier interval is set for the UL control channel, and the UL control channel is a multi-symbol PUCCH. When transmitted in the form of a PUCCH, a 15 kHz subcarrier spacing may be set for the UL control channel.

3.1.4. Interpretation of Scheduling Information According to Asymmetric Numerology

When scheduling DL data through DL allocation or UL data through UL grant, the DL data or UL data may be scheduled in one subframe / slot / mini-slot or different subframes / slots / mini-slots. Can be scheduled across (cross-subframe / slot / mini-slot).

In the following description, a DCI scheduling DL data (or UL data) is transmitted in subframe / slot / mini-slot #n, and a field indicating a scheduling delay on the DCI is subframe / slot / mini-slot #. Assume that n + k indicates that DL data (or UL data) is scheduled. In this case, the UE may interpret the k value as follows according to an embodiment.

The UE may interpret the k value based on the numerology of the scheduled data. Alternatively, the UE may interpret the numerology of the DCI scheduling the k value.

As an example, when the subcarrier spacing of the DL control channel is 30 kHz and the subcarrier spacing of the DL data channel is 15 kHz, k having the value of 4 is 4 subframes after 2 ms (based on 30 kHz numerology), and Based on 15 kHz numerology).

This method may also be applied when determining a timeline for HARQ-ACK transmission corresponding to a DL data channel. That is, when the DL data channel is transmitted in subframe / slot / mini-slot #n and the HARQ-ACK information corresponding to the DL data channel is set to be transmitted in subframe / slot / mini-slot # n + k, the The k value may be interpreted based on the numerology of the DL data channel or the numerology of the UL control channel.

The various scheduling methods described above may be equally applied to self / cross carrier scheduling. In other words, a configuration in which independent numerology is applied to each DL / UL or data / control channel as described above may be equally applied to cross carrier scheduling as well as to self carrier scheduling.

3.1.5. How to set up asymmetric numerology within the same symbol

Hereinafter, a method of setting a subcarrier spacing of a data channel allocated to an unused frequency resource in a symbol interval in which a control channel is transmitted when a subcarrier spacing between a control channel and a data channel is different for a specific UE. This will be described in detail.

FIG. 11 is a diagram schematically illustrating a frame structure to which asymmetric numerology is applied according to an embodiment of the present invention.

As illustrated in FIG. 11, the UE may receive a DL control channel at a subcarrier interval of 30 kHz on Sym0 and a DL data channel at a subcarrier interval of 15 kHz on Sym1 to Sym5. In this case, some frequency resources not used for reception of the DL control channel on Sym0 may also be allocated for DL data channel purposes. Hereinafter, a method of setting a subcarrier spacing of a DL data channel scheduled on Sym0 will be described in detail as described above. Similarly, the UE may transmit a UL control channel at a subcarrier interval of 30 kHz on Sym13 and a UL data channel at a subcarrier interval of 15 kHz on Sym7 to Sym12. In this case, some frequency resources that are not used for transmission of the UL control channel on Sym13 may also be allocated for use of the UL data channel. Hereinafter, a method of setting a subcarrier spacing of a UL data channel scheduled on Sym13 will be described in detail as described above.

If the UE transmits (or receives) both a data channel and a control channel in the same symbol region, the UE transmits (or receives) the data channel and control channel in the same subcarrier interval

For example, in FIG. 11, the UE transmits a UL data channel at subcarrier intervals of 15 kHz on Sym7 to Sym12. Subsequently, when the UE transmits both the UL control channel and the UL data channel on Sym13, a rule may be set such that the UE transmits both channels at a subcarrier interval of 30 kHz.

When the UE transmits (or receives) both a data channel and a control channel in the same symbol region, the UE transmits (or receives) at subcarrier intervals respectively set according to UE capability.

For example, in FIG. 11, the UE transmits a UL data channel at subcarrier intervals of 15 kHz on Sym7 to Sym12. Subsequently, when the UE transmits both the UL control channel and the UL data channel on Sym13, the UE transmits the UL control channel at a subcarrier interval of 30 kHz only for simultaneous transmission (or simultaneous reception) capability and 15 kHz. A rule may be set to transmit a UL data channel at subcarrier spacing of.

If the subcarrier spacing settings of the data channel and the control channel are different, the UE may not expect to receive scheduling information for transmitting (or receiving) both the data channel and the control channel in the same symbol region. Or, if the subcarrier spacing settings of the data channel and the control channel are different, when the UE receives a scheduling for transmitting both the data channel and the control channel in the same symbol region, the data channel (by puncturing or rate-matching) is applied to the symbol. The rule may be set not to transmit.

If the subcarrier spacing settings of the data channel and the control channel are different, the UE may perform transmission (or reception) of the data channel based on the subcarrier spacing set for the data channel in a symbol in which the control channel does not exist. Or, if the control channel region is set, the UE is configured for the control channel for transmitting (or receiving) the data channel in the symbol in which the control channel region is set or the subcarrier interval set for the control channel (regardless of the subcarrier interval set for the control channel). It may be performed based on the subcarrier spacing set for the data channel. Alternatively, when a control channel region is set, the UE may not expect to receive information for scheduling transmission (or reception) of a data channel in a symbol region in which the control channel region is set. If the UE receives information for scheduling transmission of a data channel in a symbol region in which a control channel region is set, the UE does not transmit a data channel (by applying puncturing or rate-matching) in the corresponding symbol. Can be set.

3.2. Asymmetric TTI

For a specific UE, the TTI length for the DL and the TTI length for the UL may be set differently. Preferably, the UL TTI may be set to be larger (or longer) than the DL TTI to ensure UL coverage of the UL.

12 is a diagram illustrating a configuration in which DL TTI and UL TTI are set differently according to an embodiment of the present invention. In this case, although the DL TTI length is assumed to be 1 slot length and the UL TTI length is 2 slot length in FIG. 12, the configuration of the present invention described below may be applied even when the DL TTI is larger than the UL TTI.

Hereinafter, a detailed operation example of the UE in the above case will be described in detail.

3.2.1. First embodiment

When the UE monitors a downlink control indicator (DCI) in the DL control channel, the UE may attempt to monitor for the union of the DL TTI and UL TTI periods. More specifically, the UE may perform DCI monitoring according to a shorter TTI.

In the case of FIG. 12, the UE may attempt to monitor the DCI every slot. However, the type of DCI that the UE attempts to receive may be different for each slot. As an example, the UE may attempt to receive both the DL allocation and the UL grant in slot #n, but the UE may only attempt to receive the DL allocation in slot # n + 1.

3.2.2. Second embodiment

When the lengths of the DL TTI and the UL TTI are different from each other, a data channel on a relatively long TTI may be configured to be schedulable in DCIs of several TTIs having a relatively small length. For example, when one UL TTI is configured across slot # n + 2 and slot # n + 3, only one UL grant may be sufficient to schedule UL data on the TTI. In this case, the UL grant capable of scheduling the corresponding TTI may be set to be transmitted through one of several DL TTIs (ie, slot #n and slot # n + 1).

3.2.3. Third embodiment

When the lengths of the DL TTI and the UL TTI are different from each other, rate matching may be performed in consideration of a DL control channel region and / or a UL control channel region that may exist in a shorter TTI period when transmitting and receiving data channels on a relatively longer length TTI. Rules can be set to be performed.

For example, when one UL TTI is configured across slot # n + 2 and slot # n + 3, for the UL data channel scheduled on the TTI (DL control channel of slot # 3 according to the DL TTI period) The rule may be set such that rate matching is performed (in consideration of the DL control channel region and the GP region for receiving).

Here, the period of performing rate matching considering the UL control channel may be set to be the same as the DL TTI period. Accordingly, the UE may perform rate matching for the UL data channel in consideration of an UL control channel region composed of slot # n + 2 last k symbols, assuming that an UL control channel may exist in every slot.

13 is a view showing a signal transmission and reception method between the terminal and the base station according to the present invention.

As shown in Figure 13, the terminal and the base station according to the present invention can transmit and receive signals.

Specifically, the terminal receives the PDCCH from the base station (S1310). In this case, a first numerology (for example, 30 kHz subcarrier spacing) may be applied to the PDCCH. In other words, the PDCCH may have a first numerology, and the terminal may receive a PDCCH having the first numerology.

Subsequently, the terminal performs PDSCH reception (S1320) or PUSCH transmission (S1330) according to whether the data channel scheduled by the PDCCH is PDSCH or PUSCH. In this case, the second numerology applied to the PDSCH or PUSCH may be determined independently of the first numerology. As an example, the second numerology may have a 15 kHz subcarrier spacing.

In this case, when the UE performs the PUSCH transmission scheduled by the PDCCH, the time when the UE performs the PUSCH transmission (or the length of time between receiving the PDCCH and the time of transmitting the PUSCH) is assigned to the PUSCH. It can be determined based on the second numerology applied.

In the example of FIG. 9, when a PUSCH transmission is scheduled at a time after 4 symbols based on the DL control channel, the UE is at a time after 4 symbols (on the lower index of FIG. 9) based on the subcarrier interval applied to the UL data channel. PUSCH transmission may be performed.

In addition, when the terminal receives the PDSCH corresponding to the PDCCH, the terminal may transmit acknowledgment information (eg, A / N) for the PDSCH (S1340). In this case, the time point at which the terminal transmits the acknowledgment information may be determined based on the third numerology of the uplink control channel.

In this case, the first numerology may be set through higher layer signaling. Subsequently, the second numerology may be configured through higher layer signaling or physical layer signaling according to a data channel scheduled by the PDCCH. For example, when a PDSCH is scheduled by the PDCCH, a second numerology applied to the PDSCH may be set by higher layer signaling. On the other hand, when a PUSCH is scheduled by the PDCCH, the second numerology applied to the PUSCH may be set by physical layer signaling.

It is obvious that examples of the proposed scheme described above may also be regarded as a kind of proposed schemes as they may be included as one of the implementation methods of the present invention. In addition, although the above-described proposed schemes may be independently implemented, some proposed schemes may be implemented in a combination (or merge) form. Information on whether the proposed methods are applied (or information on the rules of the proposed methods) may be defined so that the base station informs the terminal through a predefined signal (eg, a physical layer signal or a higher layer signal). have.

4. Device Configuration

14 is a diagram illustrating the configuration of a terminal and a base station in which the proposed embodiment can be implemented. The terminal and the base station illustrated in FIG. 14 operate to implement the above-described embodiments of the method for transmitting / receiving a signal between the terminal and the base station.

A UE (UE) 1 may operate as a transmitting end in uplink and a receiving end in downlink. In addition, the base station (eNB: e-Node B or gNB: new generation NodeB, 100) may operate as a receiver in uplink and as a transmitter in downlink.

That is, the terminal and the base station may include transmitters 10 and 110 and receivers 20 and 120, respectively, to control transmission and reception of information, data and / or messages. Alternatively, the antenna may include antennas 30 and 130 for transmitting and receiving messages.

In addition, the terminal and the base station may each include a processor (Processor 40, 140) for performing the above-described embodiments of the present invention and a memory (50, 150) that can temporarily or continuously store the processing of the processor, respectively. Can be.

The terminal 1 configured as described above receives the downlink control channel having the first numerology through the receiver 20. Subsequently, the terminal 1 has a second numerology, which is scheduled by the downlink control channel through the processor 40 controlling the transmitter 10 and the receiver 20 and determined independently of the first numerology. It performs downlink data channel reception or uplink data channel transmission.

In response, the base station 100 transmits a downlink control channel having a first numerology through the transmitter 110. Subsequently, the base station 100 uses a processor 140 for controlling the transmitter 110 and the receiver 120 to determine a second independently of the first numerology based on the scheduling indicated by the downlink control channel. Performs downlink data channel transmission or uplink data channel reception with numerology.

The transmitter and the receiver included in the terminal and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission. Packet scheduling and / or channel multiplexing may be performed. In addition, the terminal and the base station of FIG. 14 may further include a low power radio frequency (RF) / intermediate frequency (IF) unit.

Meanwhile, in the present invention, the terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, an MBS. A Mobile Broadband System phone, a hand-held PC, a notebook PC, a smart phone, or a Multi Mode-Multi Band (MM-MB) terminal may be used.

Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal. have. In addition, a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.

Embodiments of the invention may be implemented through various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, a method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors and the like can be implemented.

In the case of an implementation by firmware or software, the method according to the embodiments of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above. For example, software code may be stored in memory units 50 and 150 and driven by processors 40 and 140. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

The invention can be embodied in other specific forms without departing from the technical idea and essential features of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention. In addition, the claims may be incorporated into claims that do not have an explicit citation relationship in the claims, or may be incorporated into new claims by amendment after filing.

Embodiments of the present invention can be applied to various wireless access systems. Examples of various radio access systems include 3rd Generation Partnership Project (3GPP) or 3GPP2 systems. Embodiments of the present invention can be applied not only to the various wireless access systems, but also to all technical fields to which the various wireless access systems are applied. Furthermore, the proposed method can be applied to mmWave communication system using ultra high frequency band.

Claims (16)

1. In the method of transmitting and receiving a signal of a terminal in a wireless communication system,

   Receiving a downlink control channel having a first numerology; And

   And performing a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and determined independently of the first numerology.
2. The method of claim 1,

   When reception of the downlink data channel is scheduled by the downlink control channel, a first numerology of the downlink control channel and a second numerology of the downlink data channel are different from each other.
3. The method of claim 1,

   Signal transmission and reception method of the terminal,

   Transmitting acknowledgment information for the downlink data channel when the reception of the downlink data channel is scheduled by the downlink control channel;

   The transmission time of the acknowledgment information is determined based on the third numerology of the uplink control channel, signal transmission and reception method of the terminal.
4. The method of claim 1,

   When transmission of the uplink data channel is scheduled by the downlink control channel, a first numerology of the downlink control channel and a second numerology of the uplink data channel are different from each other.
5. The method of claim 4, wherein

   The time length between the time point at which the downlink control channel is received and the time point at which the uplink data channel is transmitted is determined based on the second numerology.
6. The method of claim 1,

   The downlink control channel is a PDCCH (Physical Downlink Control CHannel),

   The downlink data channel is a PDSCH (Physical Downlink Shared CHannel),

   The uplink data channel is a PUSCH (Physical Uplink Shared CHannel), the signal transmission and reception method of the terminal.
7. The method of claim 1,

   The first numerology is established via higher layer signaling,

   The second numerology is set via the upper layer signaling or the physical layer signaling according to the data channel scheduled by the downlink control channel, the method of transmitting and receiving a signal of the terminal.
8. In the method of transmitting and receiving a signal of a base station in a wireless communication system,

   Transmitting a downlink control channel having a first numerology; And

   Performing a downlink data channel transmission or an uplink data channel reception having a second numerology independently determined from the first numerology based on scheduling indicated by the downlink control channel; How to send and receive.
9. The method of claim 8,

   And when the downlink control channel schedules transmission of the downlink data channel, a first numerology of the downlink control channel and a second numerology of the downlink data channel are different from each other.
10. The method of claim 8,

    Signal transmission and reception method of the base station,

    Receiving acknowledgment information for the downlink data channel when the downlink control channel schedules transmission of the downlink data channel;

    The transmission time of the acknowledgment information is determined based on the third numerology of the uplink control channel, signal transmission and reception method of the base station.
11. The method of claim 8,

    And when the downlink control channel schedules reception of the uplink data channel, a first numerology of the downlink control channel and a second numerology of the uplink data channel are different from each other.
12. The method of claim 11,

    And a time length between the time point at which the downlink control channel is received and the time point at which the uplink data channel is transmitted is determined based on the second numerology.
13. The method of claim 8,

    The downlink control channel is a PDCCH (Physical Downlink Control CHannel),

    The downlink data channel is a PDSCH (Physical Downlink Shared CHannel),

    The uplink data channel is a PUSCH (Physical Uplink Shared CHannel), the signal transmission and reception method of the terminal.
14. The method of claim 8,

    The first numerology is established via higher layer signaling,

    The second numerology is set via the upper layer signaling or the physical layer signaling according to the data channel scheduled by the downlink control channel, the method of transmitting and receiving a signal of the terminal.
15. A terminal for transmitting and receiving a signal with a base station in a wireless communication system,

    A transmitter;

    Receiving unit; And

    It includes a processor that is connected to the transmitter and the receiver to operate,

    The processor,

    Receiving a downlink control channel having a first numerology; And

    And perform a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and determined independently of the first numerology.
16. In the base station for transmitting and receiving signals with a terminal in a wireless communication system,

    A transmitter;

    Receiving unit; And

    It includes a processor that is connected to the transmitter and the receiver to operate,

    The processor,

    Transmitting a downlink control channel having a first numerology; And

    Perform downlink data channel transmission or uplink data channel reception having a second numerology independently determined from the first numerology based on the scheduling indicated by the downlink control channel.

Images