KR102378267B1 - Method and apparatus for supporting of various services in mobile communication systems - Google Patents

Abstract

The present disclosure relates to a communication technique that converges a 5G communication system for supporting a higher data rate after a 4G system with IoT technology, and a system thereof. The present disclosure provides intelligent services (eg, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. ) can be applied to According to an embodiment of the present invention, different wireless communication systems coexist on one carrier frequency or a plurality of carrier frequencies, and a terminal capable of transmitting and receiving data in at least one communication system among different communication systems is provided with each communication system and data A method and apparatus for transmitting and receiving may be provided.

Description

Method and apparatus for supporting various services in mobile communication system {METHOD AND APPARATUS FOR SUPPORTING OF VARIOUS SERVICES IN MOBILE COMMUNICATION SYSTEMS}

The present invention relates to a wireless communication system, and more particularly, a terminal in which different wireless communication systems coexist on one carrier frequency or multiple carrier frequencies, and transmit/receive data in at least one communication system among different communication systems It relates to a method and apparatus for transmitting and receiving data with each of these communication systems.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a system after the 4G network (Beyond 4G Network) communication system or the LTE system after (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band). In order to alleviate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, in the 5G communication system, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, for network improvement of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud radio access network: cloud RAN), an ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development is underway. In addition, in the 5G system, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technologies such as Filter Bank Multi Carrier (FBMC), NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

On the other hand, the Internet is evolving from a human-centered connection network where humans create and consume information to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. , M2M), and MTC (Machine Type Communication) are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, in technologies such as sensor network, machine to machine (M2M), and MTC (Machine Type Communication), 5G communication technology is implemented by techniques such as beam forming, MIMO, and array antenna. there will be The application of cloud radio access network (cloud RAN) as the big data processing technology described above can be said to be an example of convergence of 5G technology and IoT technology.

The present invention divides a subframe into a plurality of types in TDD as a method for satisfying the maximum delay time in TDD, and considers a specific subframe type among subframes of each type as a subframe capable of dynamically changing up and down. A method for transmitting and receiving data so as not to exceed a delay time, and an apparatus according thereto are provided. In addition, a method for allocating resources for 5G beyond future service using the dynamic uplink and downlink change subframes and subframes in FDD and an apparatus according thereto are provided. At this time, when uplink and downlink of TDD are dynamically changed due to URLLC support, a method and apparatus for processing a transmission signal of a previously set or indicated eMBB terminal are provided.

The present invention for solving the above problems is a control signal processing method in a wireless communication system, the method comprising: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.

According to the present invention, as a method for satisfying the maximum delay time in TDD for 5G, subframes are divided into a plurality of types in TDD, and a specific subframe type among subframes of each type can be dynamically changed up and down. Provided are a method for transmitting and receiving data so as not to exceed a maximum delay time in consideration of a frame, and an apparatus according thereto. In addition, it provides a resource allocation method and apparatus for 5G beyond future service using the dynamic uplink and downlink change subframes and subframes in FDD. At this time, when uplink and downlink of TDD are dynamically changed due to URLLC support, a method and apparatus for processing a transmission signal of a previously set or indicated eMBB terminal are provided. On the other hand, various other effects will be disclosed directly or implicitly in the detailed description according to the embodiment of the present invention to be described later.

1A is a diagram showing the basic structure of a time-frequency domain in an LTE system;
1B is a diagram illustrating an example in which 5G services are multiplexed and transmitted in one system;
1C is a diagram showing a first embodiment of a communication system to which the present invention is applied;
1D is a diagram showing a second embodiment of a communication system to which the present invention is applied;
1E is a diagram illustrating a first embodiment of operating 5G for each subframe type in TDD;
1f is a diagram illustrating a second embodiment of operating 5G for each subframe type in TDD;
1G is a diagram illustrating a procedure of a base station and a terminal according to an embodiment of the present invention for operating 5G for each subframe type in TDD;
1H is a diagram illustrating a first embodiment for providing future compatibility for each subframe type in TDD;
1I is a diagram illustrating a second embodiment for providing future compatibility for each subframe type in FDD;
1j is a diagram illustrating a base station and a terminal procedure according to an embodiment of the present invention for providing future compatibility for each subframe type;
1M is a diagram illustrating a first embodiment of operation of another service in a situation in which an emergency URLLC service is supported in TDD;
1O is a diagram illustrating a scheme for supporting an emergency URLLC service in TDD;
1N is a diagram illustrating a second embodiment of operation of another service in a situation in which an emergency URLLC service is supported in TDD;
1k is a view showing a base station apparatus according to the present invention;
11 is a diagram illustrating a terminal device according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. And, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In general, a mobile communication system has been developed to provide a voice service while ensuring user activity. However, the mobile communication system is gradually expanding its scope not only to voice but also to data services, and has now developed to the extent that it can provide high-speed data services. However, in a mobile communication system in which a service is currently provided, a more advanced mobile communication system is required because there is a shortage of resources and users demand a higher speed service.

In response to this demand, as one of the systems being developed as a next-generation mobile communication system, the 3rd Generation Partnership Project (3GPP) is currently working on a standard for Long Term Evolution (LTE). LTE is a technology that implements high-speed packet-based communication with a transmission speed of up to 100 Mbps. To this end, various methods are being discussed, for example, a method of reducing the number of nodes located on a communication path by simplifying the network structure, or a method of bringing wireless protocols as close to a wireless channel as possible.

The LTE system employs a Hybrid Automatic Repeat reQuest (HARQ) method for retransmitting the corresponding data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ scheme, when the receiver fails to correctly decode data, the receiver transmits negative acknowledgment (NACK) notifying the transmitter of decoding failure so that the transmitter can retransmit the data in the physical layer. The receiver combines the data retransmitted by the transmitter with the previously unsuccessful data to improve data reception performance. In addition, when the receiver correctly decodes data, it is possible to transmit information (ACK) informing the transmitter of decoding success so that the transmitter can transmit new data.

1A is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in downlink in an LTE system.

In FIG. 1A , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol. N _symb (1a-02) OFDM symbols are gathered to form one slot (1a-06), and two slots are gathered to form one subframe (1a-05). make up The length of the slot is 0.5 ms, and the length of the subframe is 1.0 ms. And, the radio frame 1a-14 is a time domain unit composed of 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth consists of a total of N _BW (1a-04) subcarriers.

A basic unit of a resource in the time-frequency domain is a resource element (1a-12, Resource Element; RE), which may be represented by an OFDM symbol index and a subcarrier index. A resource block (1a-08, Resource Block; RB or Physical Resource Block; PRB) has N _symb (1a-02) consecutive OFDM symbols in the time domain and N _RB (1a-10) consecutive subcarriers in the frequency domain is defined as Accordingly, one RB 1a-08 is composed of N _symb x N _RB REs 1a-12. In general, the minimum transmission unit of data is the RB unit. In the LTE system, in general, N _symb = 7, N _RB = 12, and N _BW and N _RB are proportional to the bandwidth of the system transmission band. The data rate increases in proportion to the number of RBs scheduled for the UE. The LTE system defines and operates six transmission bandwidths. In the case of an FDD system operating by dividing downlink and uplink by frequency, the downlink transmission bandwidth and the uplink transmission bandwidth may be different from each other. The channel bandwidth represents an RF bandwidth corresponding to a system transmission bandwidth. [Table 1a-01] shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system. For example, an LTE system having a 10 MHz channel bandwidth has a transmission bandwidth of 50 RBs.

[Table 1a-01]

Downlink control information is transmitted within the first N OFDM symbols in the subframe. In general, N = {1, 2, 3}. Accordingly, the value of N varies for each subframe according to the amount of control information to be transmitted in the current subframe. The control information includes a control channel transmission interval indicator indicating how many OFDM symbols the control information is transmitted, scheduling information for downlink data or uplink data, and HARQ ACK/NACK signals.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from the base station to the terminal through downlink control information (DCI). The uplink (UL) refers to a radio link in which the terminal transmits data or control signals to the base station, and the downlink (DL) refers to a radio link in which the base station transmits data or control signals to the user equipment. DCI defines various formats, whether it is scheduling information (UL (uplink) grant) for uplink data or scheduling information (DL (downlink) grant) for downlink data, whether it is a compact DCI with a small size of control information DCI format determined according to whether or not spatial multiplexing using multiple antennas is applied, whether DCI for power control is used, etc. is applied and operated. For example, DCI format 1, which is scheduling control information (DL grant) for downlink data, is configured to include at least the following control information.

- Resource allocation type 0/1 flag (Resource allocation type 0/1 flag): Notifies whether the resource allocation method is type 0 or type 1. Type 0 allocates resources in a RBG (resource block group) unit by applying a bitmap method. A basic unit of scheduling in the LTE system is a resource block (RB) expressed by time and frequency domain resources, and the RBG is composed of a plurality of RBs to become a basic unit of scheduling in the type 0 scheme. Type 1 allows to allocate a specific RB within an RBG.

- Resource block assignment: Notifies the RB allocated for data transmission. The resource to be expressed is determined according to the system bandwidth and resource allocation method.

- Modulation and coding scheme (MCS): Notifies the modulation scheme used for data transmission and the size of the transport block, which is data to be transmitted.

- HARQ process number (HARQ process number): Notifies the process number of HARQ.

- New data indicator (New data indicator): Notifies whether HARQ initial transmission or retransmission.

- Redundancy version: Notifies the redundancy version of HARQ.

- Transmit Power Control (TPC) command for PUCCH (Physical Uplink Control CHannel): Notifies a transmit power control command for PUCCH, which is an uplink control channel.

The DCI is transmitted through a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH) that is a downlink physical control channel through channel coding and modulation.

In general, the DCI is independently channel-coded for each UE, and is configured and transmitted as an independent PDCCH. In the time domain, the PDCCH is mapped and transmitted during the control channel transmission period. The frequency domain mapping position of the PDCCH is determined by the identifier (ID) of each terminal, and is spread over the entire system transmission band.

Downlink data is transmitted through a Physical Downlink Shared Channel (PDSCH), which is a physical channel for downlink data transmission. The PDSCH is transmitted after the control channel transmission period, and the DCI transmitted through the PDCCH informs scheduling information such as a specific mapping position and a modulation method in the frequency domain.

Among the control information constituting the DCI, the base station notifies the UE of the modulation scheme applied to the PDSCH to be transmitted and the size of the data to be transmitted (transport block size; TBS) through the MCS composed of 5 bits. The TBS corresponds to a size before channel coding for error correction is applied to data (transport block, TB) to be transmitted by the base station.

Modulation schemes supported by the LTE system are Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (16QAM), and 64QAM, and each modulation order (Q _m ) corresponds to 2, 4, and 6. That is, 2 bits per symbol in the case of QPSK modulation, 4 bits per symbol in the case of 16QAM modulation, and 6 bits per symbol in the case of 64QAM modulation may be transmitted.

In 3GPP LTE Rel-10, compared to LTE Rel-8, a bandwidth extension technology was adopted to support a higher data transmission amount. The technology, called bandwidth extension or carrier aggregation (CA), can increase the data transmission amount by the extended band compared to LTE Rel-8 terminals that transmit data in one band by extending the band. . Each of the above bands is called a component carrier (CC), and the LTE Rel-8 terminal is defined to have one component carrier for each downlink and uplink. In addition, the downlink component carrier and the uplink component carrier connected to SIB-2 are collectively called a cell. The SIB-2 connection relationship between the downlink component carrier and the uplink component carrier is transmitted as a system signal or an upper level signal. A terminal supporting CA may receive downlink data through a plurality of serving cells and may transmit uplink data.

In Rel-10, when it is difficult for the base station to send a Physical Downlink Control Channel (PDCCH) in a specific serving cell to a specific UE, another serving cell transmits the PDCCH and the corresponding PDCCH is the PDSCH (Physical Downlink Shared Channel) of another serving cell or A carrier indicator field (CIF) may be configured as a field indicating that a Physical Uplink Shared Channel (PUSCH) is indicated. CIF may be configured for a terminal supporting CA. CIF is determined to indicate another serving cell by adding 3 bits to PDCCH information in a specific serving cell. CIF is included only when cross-carrier scheduling is performed, and when CIF is not included, cross-carrier scheduling do not perform When the CIF is included in the downlink assignment information (DL assignment), the CIF indicates a serving cell to which the PDSCH scheduled by the DL assignment will be transmitted, and the CIF is included in the uplink resource assignment information (UL grant) When present, the CIF is defined to indicate a serving cell to which a PUSCH scheduled by the UL grant will be transmitted.

As described above, in LTE-10, carrier aggregation (CA), which is a bandwidth extension technology, is defined, and a plurality of serving cells may be configured in the terminal. In addition, the terminal periodically or aperiodically transmits channel information for the plurality of serving cells to the base station for data scheduling of the base station. The base station schedules and transmits data for each carrier, and the terminal transmits A/N feedback for the data transmitted for each carrier. LTE Rel-10 is designed to transmit A/N feedback of up to 21 bits, and when transmission of A/N feedback and channel information overlaps in one subframe, A/N feedback is transmitted and channel information is discarded. . LTE Rel-11 is designed to multiplex channel information of one cell with A/N feedback so that A/N feedback of up to 22 bits and channel information of one cell are transmitted in PUCCH format 3 from transmission resources of PUCCH format 3 did

In LTE-13, a scenario of setting up a maximum of 32 serving cells is assumed, and the concept of extending the number of serving cells to a maximum of 32 is completed using bands in the unlicensed band, which is not only the licensed band but also the unlicensed band. In addition, considering that the number of licensed bands such as LTE frequencies is limited, the provision of LTE services in unlicensed bands such as 5GHz bands has been completed, and this is called LAA (Licensed Assisted Access). In LAA, by applying the carrier aggregation technology in LTE, it supported the operation of LTE cells in licensed bands as P cells and LAA cells in unlicensed bands as S cells. Therefore, as in LTE, feedback generated in the LAA cell, which is an S cell, must be transmitted only in the P cell, and the downlink subframe and the uplink subframe can be freely applied to the LAA cell. Unless otherwise described in this specification, LTE is meant to include all evolutionary technologies of LTE, such as LTE-A and LAA.

On the other hand, New Radio Access Technology (NR), a communication system after LTE, that is, a 5th generation wireless cellular communication system (hereinafter referred to as 5G in this specification) can freely reflect various requirements of users and service providers. Because there must be, services that satisfy various requirements can be supported.

Therefore, 5G includes increased mobile broadband communication (eMBB: Enhanced Mobile BroadBand, hereinafter referred to as eMBB), large-scale machine type communication (mMTC: Massive Machine Type Communication, hereinafter referred to as mMTC), Various 5G-oriented services such as Ultra Reliable and Low Latency Communications (URLLC: Ultra Reliable and Low Latency Communications, hereafter referred to as URLLC) can be provided with a maximum transmission speed of 20 Gbps, a maximum terminal speed of 500 km/h, and a maximum delay time of 0.5 ms. It can be defined as a technology to satisfy the requirements selected for each 5G-oriented service among the requirements such as , terminal connection density of 1,000,000 terminals/km ² , etc.

For example, in order to provide eMBB in 5G, from the viewpoint of one base station, it should be able to provide a maximum terminal transmission rate of 20 Gbps in downlink and a maximum terminal transmission rate of 10 Gbps in uplink. At the same time, it is also necessary to increase the average transmission speed that the terminal can actually feel. In order to satisfy such a requirement, it is required to improve transmission/reception technology including a more advanced multiple-input multiple output transmission technology.

At the same time, mMTC is being considered to support application services such as the Internet of Thing (IoT) in 5G. In order to efficiently provide the Internet of Things, mMTC requires large-scale terminal access support, terminal coverage improvement, improved battery life, and terminal cost reduction in a cell. Since the Internet of Things is attached to various sensors and various devices to provide communication functions, it must be able to support a large number of terminals (eg, 1,000,000 terminals/km ² ) within a cell. In addition, due to the characteristics of the service, the UE is likely to be located in a shaded area such as the basement of a building or an area not covered by the cell, so it requires a wider coverage than the coverage provided by the eMBB. The mMTC is likely to be composed of a low-cost terminal, and since it is difficult to frequently exchange the battery of the terminal, a very long battery life time is required.

Lastly, in the case of URLLC, as a cellular-based wireless communication used for a specific purpose, it is a service used for remote control of robots or mechanical devices, industrial automation, unmanned aerial vehicles, remote health control, emergency notification, etc. , providing communications that provide ultra-low latency and ultra-reliability. For example, URLLC must satisfy the maximum latency of less than 0.5 ms, and at the same time has the requirement to provide a packet error rate of 10 ^-5 or less. Therefore, it is necessary to provide a transmit time interval (TTI) smaller than 5G services such as eMBB for URLLC, and at the same time, design considerations for allocating wide resources in a frequency band are required.

The services considered in the above-described 5G wireless cellular communication system should be provided as one framework. That is, for efficient resource management and control, it is preferable that each service is integrated and controlled and transmitted as a single system rather than being operated independently.

1B is a diagram illustrating an example in which services considered in 5G are multiplexed into one system and transmitted.

In FIG. 1B , the frequency-time resource 1b-01 used by 5G may be composed of a frequency axis 1b-02 and a time axis 1b-03. In FIG. 1b, 5G exemplifies that eMBB (1b-05), mMTC (1b-06), and URLLC (1b-07) are operated by a 5G base station within one framework. In addition, as a service that can be additionally considered in 5G, an enhanced Mobile Broadcast/Multicast Service (eMBMS, 1b-08) for providing a broadcast service on a cellular basis may be considered. Services considered in 5G, such as eMBB(1b-05), mMTC(1b-06), URLLC(1b-07), and eMBMS(1b-08), are time-division multiplexed within one system frequency bandwidth operated by 5G (Time -Division multiplexing: TDM) or frequency division multiplexing (FDM) may be multiplexed and transmitted, and spatial division multiplexing may also be considered. In the case of the eMBB (1b-05), it is preferable to occupy and transmit the maximum frequency bandwidth at a specific arbitrary time in order to provide the above-mentioned increased data transmission rate. Therefore, in the case of the eMBB (1b-05) service, it is preferable to be TDMed and transmitted within the system transmission bandwidth 1b-01 with other services. It is also desirable to be

In the case of mMTC (1b-06), unlike other services, an increased transmission interval is required to secure wide coverage, and coverage can be secured by repeatedly transmitting the same packet within the transmission interval. At the same time, in order to reduce the complexity of the terminal and the price of the terminal, a transmission bandwidth that the terminal can receive is limited. Considering this requirement, it is desirable that mMTC (1b-06) be transmitted after FDM with other services within the bandwidth (1b-01) of the 5G transmission system.

The URLLC 1b-07 preferably has a short Transmit Time Interval (TTI) compared to other services in order to satisfy the ultra-delay requirement required by the service. At the same time, since it is necessary to have a low coding rate in order to satisfy the super-reliability requirement, it is desirable to have a wide bandwidth in terms of frequency. Considering the requirements of the URLLC 1b-07, it is preferable that the URLLC 1b-07 be TDMed with other services within the 5G transmission system bandwidth 1b-01.

Each of the above-described services may have different transmission/reception schemes and transmission/reception parameters in order to satisfy the requirements of each service. For example, each service can have a different numerology depending on the requirements of each service. Here, Numerology is a Cyclic Prefix (CP) length, a subcarrier interval in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA). spacing), OFDM symbol length, and transmission interval length (TTI). As an example of having different numerologies between the above services, the eMBMS 1b-08 may have a longer CP length than other services. Since eMBMS transmits broadcast-based higher level traffic, the same data can be transmitted in all cells. At this time, if signals received from a plurality of cells reach within the CP length from the viewpoint of the UE, the UE can receive and decode all of these signals, so that a single frequency network diversity (SFN) gain can be obtained, Accordingly, there is an advantage that a terminal located at the cell boundary can receive broadcast information without coverage restrictions. However, in supporting eMBMS in 5G, if the CP length is relatively long compared to other services, waste due to CP overhead occurs. At the same time, a longer OFDM symbol length is required compared to other services, which is more A narrow subcarrier spacing is required.

In addition, as an example in which different numerology is used between services in 5G, in the case of URLLC, a shorter OFDM symbol length may be required as a smaller TTI is required compared to other services, and a wider subcarrier interval may be required at the same time.

In the above, the necessity of various services to satisfy various requirements in 5G was described, and the requirements for the services considered representatively were described.

The frequency that 5G is considered to be operated ranges from several GHz to several tens of GHz, and in a few GHz band with low frequencies, FDD (Frequency Division Duplex) is preferred over TDD (Time Division Duplex), and in a high frequency tens of GHz band, FDD rather than FDD TDD is considered suitable. However, unlike FDD, which continuously provides uplink and downlink transmission resources by setting separate frequencies for uplink and downlink transmission, TDD must support both uplink and downlink transmission on one frequency and provides only uplink resources or downlink resources depending on time. If it is assumed that URLLC uplink or downlink transmission is required in TDD, it is difficult to satisfy the ultra-delay requirement of URLLC due to the delay until the time when uplink or downlink resources appear. Therefore, in the case of TDD, in order to satisfy the ultra-delay requirement of URLLC, there is a need for a method for dynamically changing a subframe to an uplink or downlink according to whether data of URLLC is uplink or downlink.

Meanwhile, in the case of 5G multiplexing services and technologies for 5G phase 2 or beyond 5G to 5G operating frequencies in the future, it should be possible to provide 5G phase 2 or beyond 5G technologies and services so that there is no backward compatibility problem in 5G operation. There are requirements that The above requirement is called forward compatibility, and technologies to satisfy future compatibility should be considered when designing 5G. In the initial LTE standardization stage, future compatibility considerations were insufficient, so there may be restrictions in providing new services within the LTE framework. For example, in the case of eMTC (enhanced machine type communication) applied in LTE release-13, in order to reduce the price of the terminal by reducing the complexity of the terminal, the system transmission bandwidth provided by the serving cell (System Bandwidth) Regardless, communication is possible only at the frequency corresponding to 1.4 MHz. Therefore, since a UE supporting eMTC cannot receive a Physical Downlink Control Channel (PDCCH) transmitted in all bands of the existing system transmission bandwidth, the PDCCH is transmitted in a time interval. A constraint that cannot be received has occurred. Therefore, the 5G communication system must be designed so that services considered after the 5G communication system can efficiently coexist and operate with the 5G communication system. For future compatibility in the 5G communication system, resource resources must be freely allocated and transmitted so that services to be considered in the future can be freely transmitted in the time-frequency resource area supported by the 5G communication system. Accordingly, there is a need for a method for allocating time-frequency resources freely to support future compatibility in a 5G communication system.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted.

In addition, in describing the embodiments of the present invention in detail, LTE and 5G systems will be mainly targeted, but the main gist of the present invention is to greatly extend the scope of the present invention to other communication systems having a similar technical background and channel type. It can be applied with some modifications within the scope not departing from, and this will be possible at the discretion of a person having technical knowledge skilled in the art of the present invention.

Hereinafter, a 5G communication system in which 5G cells operate as a stand-alone 5G communication system or a 5G communication system that operates as a non-stand alone in combination with dual connectivity or carrier aggregation together with other stand-alone 5G cells will be described.

1C and 1D are diagrams showing a first embodiment and a second embodiment of a communication system to which the present invention is applied. The methods proposed in the present invention are applicable to both the system of FIG. 1C and the system of FIG. 1D.

Referring to FIG. 1c , FIG. 1c illustrates a case in which a 5G cell 1c-02 in one base station 1c-01 operates in a stand-alone manner in a network. The terminal 1c-04 is a 5G capable terminal having a 5G transmission/reception module. The terminal 1c-04 acquires synchronization through a synchronization signal transmitted from the 5G stand-alone cell 1c-01, and after receiving system information, attempts random access to the 5G base station 1c-01. After the RRC connection with the 5G base station 1c-01 is completed, the terminal 1c-04 transmits and receives data through the 5G cell 1c-02. In this case, there is no restriction on the duplex method of the 5G cell 5c-02. In the system of 1c, the 5G cell may include a plurality of serving cells.

Referring to FIG. 1d, FIG. 1d shows the installation of a 5G stand-alone base station 1d-01 and a 5G non-stand alone base station 1d-02 for increasing the data transmission amount. The terminal 1d-04 is a 5G capable terminal having a 5G transmission/reception module for performing 5G communication in multiple base stations. The terminal 1d-04 acquires synchronization through a synchronization signal transmitted from the 5G stand-alone base station 1d-01, and after receiving system information, random access to the 5G stand-alone base station 1d-01 try After the RRC connection with the 5G stand-alone base station 1d-01 is completed, the terminal 1d-04 additionally configures a 5G non-stand alone cell 1d-05, and the 5G stand-alone base station 1d- 01) or 5G non-stand alone base station (1d-02) transmits and receives data. In this case, there is no restriction on the duplex method of the 5G stand-alone base station (1d-01) or the 5G non-stand alone base station (1d-02), and the 5G stand-alone base station (1d-01) and the 5G non-stand alone It is assumed that the base station 1d-02 is connected to an ideal or non-ideal backhaul network. Therefore, in the case of an ideal backhaul network (1d-03), fast X2 communication between base stations (1d-03) is possible. In the system of 1d, the 5G cell may include a plurality of serving cells.

Next, when TDD is operated in the 5G communication system of FIGS. 1C and 1D, subframes are divided into a plurality of types, and a specific subframe type among subframes of each type is considered as a subframe that can be dynamically changed up and down. Explain how to avoid exceeding the maximum delay time.

First, FIG. 1E is a diagram illustrating a first embodiment of operating 5G for each subframe type in TDD. In FIG. 1e, when operating 5G on one TDD carrier, subframe types are divided into fixed subframes, RRC subframes, and dynamic subframes, and synchronization signal and system information transmission and random access are performed in the fixed subframe, and in the RRC subframe It is a diagram illustrating an operation of transmitting and receiving additional system information, performing additional random access, and transmitting/receiving data by dynamically changing subframes to match uplink and downlink data in dynamic subframes.

The base station divides subframes into fixed subframes, RRC subframes, and dynamic subframes in operating TDD. First, the fixed subframe will be described.

In FIG. 1e, TDD (1e-01) information (carrier frequency BW and location information, etc.) may be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal acquires synchronization in a fixed subframe (1e-02), essential system The information can be obtained through information reception. The position and number of the fixed subframes 1e-02 in FIG. 1E is an example. Different fixed subframe positions, different number of fixed subframes, downlink fixed subframes and uplink fixed subframes may be determined in advance through the standard. The 5G capable terminal attempts synchronization acquisition and essential system information in the downlink fixed subframes, obtains random access related information through the received essential system information, and attempts random access in the uplink fixed subframes do.

Next, the RRC subframe (1e-03) will be described. The number of the fixed subframes 1e-02 is preferably set to a minimum standard. The reason is that when the number of fixed subframes 1e-02 increases, a delay time due to the fixed subframes must be considered. If uplink data transmission for URLLC occurs in the downlink fixed subframe, URLLC uplink data transmission must be delayed until the uplink subframe appears, and in this case, it is difficult to satisfy the ultra-delay time requirement for URLLC. Therefore, instead of minimizing the number and location of the fixed subframes 1e-02, RRC subframes 1e-03 to support service-specific system information transmission according to the number of terminals in the cell and a random access command by the base station. to be set by the base station through transmission of the upper-order signal, and the terminal acquires the up-and-down positions and the number of the RRC subframes 1e-03 from the reception of the higher-order signals, and in the RRC subframes 1e-03, the set direction Decoding complexity can be reduced by performing only the decoding of downlink control information of . Accordingly, when there is no information on the RRC subframe 1e-03 from the base station, the UE attempts to decode only the downlink control information according to the uplink subframe for the uplink fixed subframe 1e-02, and downlinks the downlink subframe 1e-02. For the subframe 1e-02, an attempt is made to decode only downlink control information according to the downlink subframe. All subframes other than the fixed subframes 1e-02 are determined to be dynamic subframes 1e-04, and every subframe attempts to decode all downlink control information for uplink and downlink subframes. When information on the RRC subframe (1e-03) is transmitted from the base station and received by the terminal, the terminal attempts to decode only downlink control information according to the uplink subframe for the uplink fixed subframe (1e-02) , attempts to decode only downlink control information according to the downlink subframe for the downlink fixed subframe 1e-02. Next, for the uplink RRC subframe (1e-03), an attempt is made to decode only downlink control information according to the uplink subframe, and for the downlink RRC subframe (1e-03), only downlink control information according to the downlink subframe is decoded. try for All subframes other than the fixed subframe 1e-02 and the RRC subframe 1e-03 are determined to be dynamic subframes 1e-04, and all downlink control for uplink and downlink subframes for every subframe Attempts to decrypt the information.

Next, the dynamic subframes 1e-04 will be described. The dynamic subframes 1e-04 may be either a downlink subframe or an uplink subframe according to the base station scheduling. The terminal determines whether the corresponding dynamic subframe 1e-04 is uplink or downlink through the reception of downlink control information transmitted by the base station, and receives downlink data and uplink data according to scheduling based on the determined subframe and the decoded downlink control information. carry out the transfer

Next, when TDD is operated in the 5G communication system of FIGS. 1C and 1D, subframes are divided into a plurality of types, and a specific subframe type among subframes of each type is considered as a subframe that can be dynamically changed up and down. Explain how to avoid exceeding the maximum delay time.

1F is a diagram illustrating a second embodiment of operating 5G for each subframe type in TDD. When operating 5G on one TDD carrier in FIG. 1f, all subframes are operated as dynamic subframes, and synchronization signal and system information transmission and random access performance are supported through another 5G stand-alone cell, dynamic subframes Fig. 1 is a diagram illustrating an operation of transmitting and receiving data by dynamically changing subframes to match uplink and downlink data.

The base station operates all subframes as dynamic subframes in operating TDD. First, a method for receiving a synchronization signal and system information reception and random access for a terminal will be described.

In FIG. 1f, TDD (1f-01) information (such as carrier frequency BW and location information) may be transmitted to a 5G capable terminal from another stand-alone 5G base station connected to carrier aggregation or dual connectivity, and the 5G capable terminal is the The above information can be obtained through synchronization acquisition and essential system information reception from a stand-alone 5G base station.

Since all subframes are operated as a dynamic subframe 1f-02, the dynamic subframe 1f-02 may be a downlink subframe or an uplink subframe according to the base station scheduling. The UE determines whether the corresponding dynamic subframe 1f-02 is uplink or downlink through the reception of downlink control information transmitted by the base station, and receives downlink data and uplink data according to scheduling based on the determined subframe and the decoded downlink control information. carry out the transfer

Next, FIG. 1G is a diagram illustrating a procedure of a base station and a terminal according to an embodiment of the present invention for operating 5G for each subframe type in TDD. 1G, a procedure in which a 5G base station sets 5G resources for each subframe type in TDD and transmits and receives data between the 5G terminal and the 5G resources will be described.

In step 1g-10, the 5G base station transmits synchronization and system information to the 5G terminal in a fixed subframe. As for the synchronization signal for 5G, a separate synchronization signal may be transmitted for eMBB, mMTC, and URLLC using different numerology, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. The system information includes 5G frequency information (carrier frequency, physical resource block, etc.), time information (radio frame index, subframe index, MBSFN subframe information for 5G transmission, information for random access), antenna information, spatial information, duplex It may include information (FDD DL, UL carrier information, TDD UL/DL configuration information, LAA operation related information), a reference signal, or a synchronization signal. As for the above system information, a common system signal may be transmitted to a specific 5G resource using one numerology, and separate system information may be transmitted for eMBB, mMTC, and URLLC using a different numerology.

In step 1g-11, the 5G base station detects the random access reception from the 5G terminal in the fixed subframe, and performs a random access procedure from the 5G terminal.

In step 1g-12, the 5G base station transmits a signal indicating the RRC subframe to the 5G terminal. Steps 1g-12 may be performed when the 5G base station determines that it is necessary. When the signal is not transmitted, the subframe type operates only with a fixed subframe and a dynamic subframe.

In step 1g-13, the 5G base station transmits and receives signals to and from the 5G terminal in the RRC subframe and the dynamic subframe. Information transmitted and received and the base station procedure follow the descriptions of FIGS. 1E and 1F.

Next, in TDD, a procedure in which a 5G terminal receives 5G resources for each subframe type configured from the 5G base station and transmits and receives data between the 5G base station and the 5G resources will be described.

In step 1g-20, the 5G terminal receives synchronization and system information in a fixed subframe from the 5G base station. As for the synchronization signal for 5G, a separate synchronization signal may be transmitted for eMBB, mMTC, and URLLC using different numerology, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. The system information includes 5G frequency information (carrier frequency, physical resource block, etc.), time information (radio frame index, subframe index, MBSFN subframe information for 5G transmission, information for random access), antenna information, spatial information, duplex It may include information (FDD DL, UL carrier information, TDD UL/DL configuration information, LAA operation related information), a reference signal, or a synchronization signal. As for the above system information, a common system signal may be received for a specific 5G resource using one numerology, and separate system information may be received for eMBB, mMTC, and URLLC using a different numerology.

In step 1g-21, the 5G terminal attempts random access in a fixed subframe, and performs a random access process with the 5G base station.

In step 1g-22, the 5G terminal receives a signal indicating the RRC subframe from the 5G base station. If the 5G terminal does not receive the signal in step 1g-21, the 5G terminal determines that there are only fixed subframes and dynamic subframes as subframe types.

In step 1g-23, the 5G terminal transmits and receives signals in the RRC subframe and the dynamic subframe from the 5G base station. Information transmitted and received and a terminal procedure follow the descriptions of FIGS. 1E and 1F .

Next, FIG. 1H is a diagram illustrating a first embodiment for providing future compatibility for each subframe type in TDD. In the case of providing 5G phase 2 or beyond 5G technology and services in the future through FIG. 1h, a method is provided so that there is no backward compatibility problem in 5G service and technical support.

When operating 5G on one TDD carrier in FIG. 1H, subframe types are divided into fixed subframes, RRC subframes, and future compatibility subframes, and in the fixed subframe, synchronization signal and system information transmission and random access are performed, RRC subframe In the diagram, additional system information transmission and additional random access are performed, and 5G data transmission/reception or data transmission/reception for 5G phase 2 and beyond 5G technologies and services in future compatible subframes are illustrated. Therefore, it can be seen that there is no backward compatibility problem in 5G service and technical support because essential and additional system operations are performed through a fixed subframe or an RRC subframe no matter what purpose the future compatibility subframes are used for.

In more detail, the base station divides subframes into fixed subframes, RRC subframes, and future compatibility subframes in operating TDD. First, the fixed subframe will be described.

In FIG. 1h, TDD (1h-01) information (carrier frequency BW and location information, etc.) can be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal acquires synchronization in a fixed subframe (1h-02), essential system The information can be obtained through information reception. The position and number of the fixed subframes 1h-02 in FIG. 1H is an example. Different fixed subframe positions, different number of fixed subframes, downlink fixed subframes and uplink fixed subframes may be determined in advance through the standard. The 5G capable terminal attempts synchronization acquisition and essential system information in the downlink fixed subframes, obtains random access related information through the received essential system information, and attempts random access in the uplink fixed subframes do.

Next, the RRC subframe (1h-03) will be described. The number of the fixed subframes 1h-02 is preferably set to a minimum standard. The reason is that if the number of fixed subframes 1h-02 increases, delay time due to the fixed subframes must be taken into account, and the number of subframes that can be used for future compatibility decreases. If uplink data transmission for URLLC occurs in the downlink fixed subframe, URLLC uplink data transmission must be delayed until the uplink subframe appears, and in this case, it is difficult to satisfy the ultra-delay time requirement for URLLC. Therefore, instead of minimizing the number and location of the fixed subframes (1h-02), RRC subframes (1h-03) to support service-specific system information transmission according to the number of terminals in the cell and a random access command by the base station can be set by the base station through transmission of the upper-order signal, and the terminal acquires the up-and-down positions and the number of the RRC subframes 1h-03 from the reception of the higher-order signals, and in the RRC subframes 1h-03, the set direction Decoding complexity can be reduced by performing only the decoding of downlink control information of . Therefore, when there is no information about the RRC subframe (1h-03) from the base station, the terminal attempts to decode only downlink control information according to the uplink subframe for the uplink fixed subframe (1h-02), and the downlink is fixed For the subframe 1h-02, an attempt is made to decode only downlink control information according to the downlink subframe. All subframes other than the fixed subframes 1h-02 are determined to be future compatible subframes 1h-04, and every subframe attempts to decode all downlink control information for uplink and downlink subframes. When the terminal does not receive any downlink control information, the terminal does not perform any operation in the future compatibility subframe and enters an idle state to reduce power consumption. When information on the RRC subframe (1h-03) is transmitted from the base station and received by the terminal, the terminal attempts to decode only downlink control information according to the uplink subframe for the uplink fixed subframe (1h-02) , attempts to decode only downlink control information according to the downlink subframe for the downlink fixed subframe 1h-02. Next, for the uplink RRC subframe (1h-03), an attempt is made to decode only downlink control information according to the uplink subframe, and for the downlink RRC subframe (1h-03), only downlink control information according to the downlink subframe is decoded. try for All of the remaining subframes except for the fixed subframe (1h-02) and the RRC subframe (1h-03) are determined as future compatible subframes (1h-04), and all downlinks for uplink and downlink subframes for every subframe Attempts to decode control information. When the terminal does not receive any downlink control information, the terminal does not perform any operation in the future compatibility subframe and enters an idle state to reduce power consumption. In fact, the UE may not be aware of the existence of the future compatible subframe. It is also possible for the UE to determine that it has not received any downlink control information in the future compatibility subframe.

Next, the future compatibility subframe (1h-04) will be described. The future compatibility subframe 1h-04 may be a downlink subframe or an uplink subframe according to the base station scheduling. The terminal determines whether the corresponding subframe (1h-04) is uplink or downlink through the reception of downlink control information transmitted by the base station, and receives downlink data and transmits uplink data according to scheduling based on the determined subframe and the decoded downlink control information. carry out When the terminal does not receive any downlink control information, the terminal does not perform any operation in the future compatibility subframe and enters an idle state to reduce power consumption. In fact, the UE may not be aware of the existence of the future compatible subframe. It is also possible for the UE to determine that it has not received any downlink control information in the future compatibility subframe.

1I is a diagram illustrating a second embodiment for providing future compatibility for each subframe type in FDD.

In the case of providing 5G phase 2 or beyond 5G technology and services in the future through FIG. 1i, a method is provided so that there is no backward compatibility problem in 5G service and technical support.

When operating 5G in FDD in FIG. 1i, subframe types are divided into fixed subframes, RRC subframes, and future compatibility subframes for each downlink carrier and uplink carrier, and in the fixed subframe of the downlink carrier, synchronization signal and system information transmission and Random access is performed, additional system information is transmitted and additional random access is performed in the RRC subframe, and 5G data transmission/reception or data transmission/reception for 5G phase 2 and beyond 5G technologies and services is shown in future compatibility subframes. In subframes, contention-based random access is performed, in RRC subframes, additional random access triggered by the base station is performed, and in future compatibility subframes, 5G data transmission/reception or data transmission/reception for 5G phase 2 and beyond 5G technologies and services are performed. It is a drawing showing. Therefore, it can be seen that there is no backward compatibility problem in 5G service and technical support because essential and additional system operations are performed through a fixed subframe or an RRC subframe no matter what purpose the future compatibility subframes are used for.

In more detail, the base station divides the subframes of the downlink carrier and the uplink carrier into a fixed subframe, an RRC subframe, and a future compatible subframe, respectively, in operating FDD.

First, the fixed subframe 1i-02 of the downlink carrier and the fixed subframe 1i-05 of the uplink carrier will be described.

In FIG. 1i, FDD (Ii-01) information (downlink and uplink carrier frequency BW and location information, etc.) may be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal is a fixed subframe of a downlink carrier (Ii-02) The above information can be obtained through acquisition of synchronization and reception of essential system information. The position and number of fixed subframes 1i-02 of a downlink carrier in FIG. 1I is an example. Other fixed subframe positions and the number of different fixed subframes may be predetermined through a standard. The 5G capable terminal attempts to acquire synchronization and essential system information in the fixed subframes, and acquires random access related information through the received essential system information. Random access is attempted in the fixed subframes 1i-05 of the uplink carrier through the obtained random access related information. The position and number of fixed subframes 1i-05 of an uplink carrier in FIG. 1I are an example. Other fixed subframe positions and the number of different fixed subframes may be predetermined through a standard.

Next, the downlink carrier RRC subframe 1i-03 and the uplink carrier RRC subframe 1i-06 will be described. The number of the fixed subframes 1i-02 and 1i-05 is preferably set to a minimum standard. The reason is that when the number of fixed subframes 1i-02 and 1i-05 increases, delay time due to the fixed subframes must be considered, and the number of subframes that can be used for future compatibility decreases. Therefore, instead of minimizing the number and location of the fixed subframes 1i-02 and 1i-05, the RRC subframe ( 1i-03 and 1i-06) enable the base station to set through transmission of higher-order signals, and the UE positions the RRC subframes 1i-03 and 1i-06 of the downlink carrier and uplink from the reception of the higher-order signal and get the number Accordingly, when there is no information on the RRC subframes 1i-03 and 1i-06 from the base station, all other subframes except for the fixed subframes 1i-02 and 1i-05 are future compatible subframes 1i -04 and 1i-07), an attempt is made to decode all downlink control information in every subframe (1i-04). When the terminal does not receive any downlink control information, the terminal does not perform any operation in the future compatibility subframe and enters an idle state to reduce power consumption. When information on the RRC subframes 1i-03 and 1i-06 is transmitted from the base station and received by the UE, the fixed subframes 1i-02 and 1i-05 and the RRC subframes 1i-03 and 1i All other subframes except -06) are determined as future compatible subframes (1i-04 and 1i-07), and every subframe (1i-04) in order to decode all downlink control information for uplink and downlink subframes. try When the terminal does not receive any downlink control information, the terminal does not perform any operation in the future compatibility subframe and enters an idle state to reduce power consumption. In fact, the UE may not be aware of the existence of the future compatible subframe. It is also possible for the UE to determine that it has not received any downlink control information in the future compatibility subframe.

Next, future compatible subframes 1i-04 and 1i-07 will be described. If the terminal does not receive any downlink control information according to the base station scheduling in the future compatibility subframe (1i-04), the terminal performs any operation in the future compatibility subframe compatibility subframes (1i-04 and 1i-07) It does not do it, and it is idle to reduce power consumption. In fact, the UE may not be aware of the existence of the future compatible subframe. It is also possible for the UE to determine that it has not received any downlink control information in the future compatibility subframe.

Next, FIG. 1J is a diagram illustrating a procedure for a base station and a terminal according to an embodiment of the present invention for providing future compatibility for each subframe type. 1J, a method for the 5G base station to set 5G resources for each subframe type to set resources for future compatibility and a procedure for transmitting and receiving data between the 5G terminal and the 5G resources will be described.

In step 1j-10, the 5G base station transmits synchronization and system information to the 5G terminal in a fixed subframe. As for the synchronization signal for 5G, a separate synchronization signal may be transmitted for eMBB, mMTC, and URLLC using different numerology, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. The system information includes 5G frequency information (carrier frequency, physical resource block, etc.), time information (radio frame index, subframe index, MBSFN subframe information for 5G transmission, information for random access), antenna information, spatial information, duplex It may include information (FDD DL, UL carrier information, TDD UL/DL configuration information, LAA operation related information), a reference signal, or a synchronization signal. As for the above system information, a common system signal may be transmitted to a specific 5G resource using one numerology, and separate system information may be transmitted for eMBB, mMTC, and URLLC using a different numerology.

In step 1j-11, the 5G base station detects the random access reception from the 5G terminal in the fixed subframe, and performs a random access procedure from the 5G terminal.

In step 1j-12, the 5G base station transmits a signal indicating the RRC subframe to the 5G terminal. Step 1j-12 may be performed when the 5G base station determines that it is necessary. When the signal is not transmitted, the subframe type operates only with a fixed subframe and a future compatible subframe.

In step 1j-13, the 5G base station transmits and receives signals to and from the 5G terminal in the RRC subframe and the future compatibility subframe. Information transmitted and received and procedures of the base station follow the descriptions of FIGS. 1H and 1I.

Next, a procedure in which the 5G terminal receives 5G resources for each subframe type set from the 5G base station and transmits and receives data from the 5G base station and the 5G resources will be described.

In step 1j-20, the 5G terminal receives synchronization and system information in a fixed subframe from the 5G base station. As for the synchronization signal for 5G, a separate synchronization signal may be transmitted for eMBB, mMTC, and URLLC using different numerology, and a common synchronization signal may be transmitted to a specific 5G resource using one numerology. The system information includes 5G frequency information (carrier frequency, physical resource block, etc.), time information (radio frame index, subframe index, MBSFN subframe information for 5G transmission, information for random access), antenna information, spatial information, duplex It may include information (FDD DL, UL carrier information, TDD UL/DL configuration information, LAA operation related information), a reference signal, or a synchronization signal. As for the above system information, a common system signal may be received for a specific 5G resource using one numerology, and separate system information may be received for eMBB, mMTC, and URLLC using a different numerology.

In step 1j-21, the 5G terminal attempts random access in a fixed subframe, and performs a random access process with the 5G base station.

In step 1j-22, the 5G terminal receives a signal indicating the RRC subframe from the 5G base station. If the 5G terminal does not receive the signal in step 1j-21, the 5G terminal determines that the subframe type has only a fixed subframe and a future compatible subframe.

In step 1j-23, the 5G terminal transmits and receives signals from the 5G base station in the RRC subframe and the future compatibility subframe. Information transmitted and received and the terminal procedure follow the descriptions in FIGS. 1H and 1I.

Next, a method of supporting the operation of another service in a situation in which the emergency URLLC service is supported in dynamic TDD will be described using FIG. 1M.

FIG. 1M is a diagram illustrating a first embodiment of operation of another service in a situation in which an emergency URLLC service is supported in TDD.

Dynamic TDD transmission in FIG. 1M means subframe operation that can be dynamically changed up and down, and follows the method described in FIGS. 1E and 1F. The base station can set the dynamic TDD transmission configuration to the terminal as a higher-order signal, and the terminal receiving the higher-order signal knows that subframes can be dynamically changed up and down according to the dynamic TDD transmission, and thus a common and dedicated downlink control channel perform decoding on If the higher-order signal is not configured, the terminal determines the upper and lower subframe positions according to the UL-DL configuration set by the SIB, and performs decoding on common and downlink control channels in the downlink subframe.

Urgent URLLC transmission is a service that requires ultra-delay requirements. The base station may set the emergency URLLC transmission setting according to the ultra-delay requirement to the URLLC terminal as an upper level signal, and the URLLC terminal receiving the upper level signal may perform an operation according to the emergency URLLC transmission/reception. When the higher-order signal is not configured, the URLLC terminal may perform general data transmission/reception with the base station.

In FIG. 1m, TDD (1m-01) information (carrier frequency BW and location information, etc.) may be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal may be transmitted from the TDD cell when the TDD cell is stand-alone or When the TDD cell is not stand-alone, the information can be obtained through acquisition of synchronization from another cell and reception of essential system information. The 5G capable terminal attempts to acquire synchronization and essential system information, acquires random access related information through the received essential system information, and attempts random access from the TDD cell or another cell.

When the eMBB service and the URLLC service are simultaneously supported in the TDD cell 1m-01, data transmission/reception is performed for the eMBB service by a slot, and data transmission/reception is performed for the URLLC service by a slot or subslot (or mini-slot) do. A slot is composed of 7 or 14 OFDM symbols, and a subslot (or mini-slot) can be composed of fewer OFDM symbols than a slot. suitable to satisfy The number of OFDM symbols of the slot or subslot may be defined in a standard for each subcarrier interval, or various numbers may be defined and configured from the base station to the terminal using higher-order signals or system information. The UE may obtain the number and length of OFDM symbols of a slot or subslot by receiving the higher-order signal or system information.

1m-02 to 1m-05 are examples showing that emergency URLLC downlink transmission is transmitted from the base station to the URLLC terminal in slot 3. Before the emergency URLLC downlink transmission occurs, slot 3 is determined to be uplink, so that uplink transmission of the eMBB terminal can be scheduled in the previous downlink slot or aperiodic channel transmission can be triggered. Alternatively, the uplink A/N feedback transmission for the downlink data transmission of the eMBB terminal in the previous downlink slot may be configured to be performed in slot 3 (uplink A/N feedback transmission timing through information of a downlink control channel scheduling downlink data). may be configured) or periodic channel transmission of the eMBB terminal in slot 3 may be configured. However, when emergency downlink URLLC transmission is generated from the base station and must be transmitted in slot 3, the base station must perform emergency downlink URLLC transmission by changing slot 3 from uplink to downlink. Therefore, the eMBB uplink transmissions described above cannot be performed as scheduled or configured in the previous slot. Therefore, the present invention proposes a solution when eMBB uplink transmission cannot be transmitted due to emergency downlink URLLC transmission.

When Slot 3 needs to be changed from uplink to downlink due to emergency URLLC downlink transmission, the base station may transmit a slot change signal to all terminals in the cell through a common downlink control channel. Alternatively, a slot change signal may be transmitted through a dedicated downlink control channel to specific terminals to which eMBB uplink transmission is to be performed in slot 3. Alternatively, UL transmission indication information indicating whether or not eMBB uplink transmission can still be performed through a common or dedicated downlink control channel may be transmitted to UEs that need to perform eMBB uplink transmission in slot 3. The slot change signal is a signal including information indicating that the slot is changed to an uplink or downlink. Upon receiving the UL transmission indication information or the slot change signal, the eMBB terminal operates according to the scheme presented in the present invention. The terminal operation is proposed through 1m-03 to 1m-05.

1m-03 is a diagram for explaining an uplink operation of an eMBB terminal when uplink transmission of the eMBB terminal is scheduled in slot 3 in a previous downlink slot or aperiodic channel transmission is triggered. In 1m-03, the eMBB terminal receives the slot change signal from the base station and determines that the uplink slot is changed to downlink. After that, the first plan for the operation of the eMBB terminal is that the eMBB terminal ignores uplink transmission scheduled or triggered in the previous downlink slot and waits for new uplink data scheduling or non-main channel transmission triggering. New uplink data scheduling or aperiodic channel transmission triggering may be received in slot 3. The eMBB terminal performs uplink transmission in another slot according to the scheduling and triggering received in slot 3. The base station performs emergency URLLC downlink transmission (1m-21) in Subslot 3. Afterwards, the second plan for the operation of the eMBB terminal is that the eMBB terminal ignores uplink transmission scheduled or triggered in the previous downlink slot and performs uplink data or non-main channel transmission in the nearest uplink slot that appears later.

1m-04 is a diagram for explaining an uplink operation of an eMBB terminal when uplink transmission of an eMBB terminal is scheduled in slot 3 in a previous downlink slot or aperiodic channel transmission is triggered. In addition, 1m-04 is an example when the eMBB terminal supports the URLLC function or when the eMBB terminal receives an indication or UL transmission indication information for a URLLC transmission resource. In the above, the indication for the URLLC transmission resource includes information on an emergency URLLC transmission resource for transmitting data within the maximum delay time that the URLLC must satisfy, such as a URLLC transmission frequency resource, a time resource, or a resource setting period. The UL transmission indication information is information indicating whether UL transmission scheduled or configured in a previous slot can be performed to the eMBB terminal when a plurality of URLLC transmissions are performed. For example, as 1-bit information, 0 may indicate information indicating not to perform UL transmission, and 1 may indicate information indicating that UL transmission may be performed. Therefore, in the case of a terminal supporting the eMBB and URLLC, as described above, when receiving an upper level signal for setting an emergency URLLC, or when the eMBB terminal receives an indication for a URLLC transmission resource, or when receiving UL transmission indication information. In this case, the operation described in this example may be followed. The indication or UL transmission indication information for the URLLC transmission resource may be transmitted during emergency URLLC transmission or after emergency URLLC transmission from the base station through an upper signal or a common/dedicated downlink control channel, and the eMBB terminal may transmit the indication or the UL transmission Instruction information may be received. In 1m-04, the eMBB terminal receives the slot change signal from the base station and determines that the uplink slot is changed to downlink. Afterwards, the first plan for the operation of the eMBB terminal is that the eMBB terminal performs scheduled or triggered uplink transmission (1m-32) in the previous downlink slot. The base station performs emergency URLLC downlink transmission (1m-31) in Subslot 3. When the eMBB terminal receives an indication for an emergency URLLC downlink control channel (1m-31) or an emergency URLLC downlink transmission resource, the transmission resource of the received URLLC data (1m-31) is the eMBB uplink transmission (1m-32) When the transmission resource is different from the transmission resource for (this example assumes that a different frequency resource is used) or when the UL transmission indication information indicates to perform eMBB uplink transmission, the eMBB terminal continues to perform the eMBB uplink transmission (1m-32). do. When the eMBB terminal receives an indication of an emergency URLLC downlink control channel (1m-31) or an emergency URLLC downlink transmission resource, the transmission resource of the received URLLC data (1m-31) is the eMBB uplink transmission (1m-32) In the case of overlapping with the transmission resource for UL transmission, or when the UL transmission indication information indicates not to perform eMBB uplink transmission, the eMBB terminal does not perform the eMBB uplink transmission (1m-32) any more.

1m-05 indicates the uplink of the eMBB terminal when the uplink A/N feedback transmission for the downlink data transmission of the eMBB terminal in the previous downlink slot is configured to be performed in slot 3 or when periodic channel transmission of the eMBB terminal is configured in slot 3 It is a diagram for explaining a transmission operation. In the above, this example can be applied when A/N feedback transmission or periodic channel transmission is transmitted through several OFDM symbols in the latter part of a slot. In addition, 1m-05 is an example when the eMBB terminal supports the URLLC function or when the eMBB terminal receives an indication for a URLLC transmission resource or UL transmission indication information. In the above, the indication for the URLLC transmission resource includes information on an emergency URLLC transmission resource for transmitting data within the maximum delay time that the URLLC must satisfy, such as a URLLC transmission frequency resource, a time resource, or a resource setting period. The UL transmission indication information is information indicating whether UL transmission scheduled or configured in a previous slot can be performed to the eMBB terminal when a plurality of URLLC transmissions are performed. For example, as 1-bit information, 0 may indicate information indicating not to perform UL transmission, and 1 may indicate information indicating that UL transmission may be performed. Therefore, in the case of a terminal supporting the eMBB and URLLC, as described above, when receiving an upper level signal for setting an emergency URLLC, or when the eMBB terminal receives an indication for a URLLC transmission resource, or when receiving UL transmission indication information. In this case, the operation described in this example may be followed. The indication or UL transmission indication information for the URLLC transmission resource may be transmitted during emergency URLLC transmission or after emergency URLLC transmission from the base station through an upper signal or a common/dedicated downlink control channel, and the eMBB terminal indicates the indication or UL transmission indication. information can be received. In 1m-05, the eMBB terminal receives the slot change signal from the base station and determines that the uplink slot is changed to the downlink. The base station performs emergency URLLC downlink transmission (1m-41) in Subslot 3. After that, the first plan for the operation of the eMBB terminal is as follows. The eMBB terminal receives an indication for an emergency URLLC downlink control channel (1m-41) or an emergency URLLC downlink transmission resource, and the transmission resource of the received URLLC data (1m-41) is for the eMBB uplink transmission (1m-42). When the transmission resource is different from the transmission resource (it is assumed in this example that a different time resource is used) or when the UL transmission indication information indicates to perform eMBB uplink transmission, the eMBB terminal continues to perform the eMBB uplink transmission (1m-42). When the eMBB terminal receives an indication for an emergency URLLC downlink control channel (1m-41) or an emergency URLLC downlink transmission resource, the transmission resource of the received URLLC data (1m-41) is the eMBB uplink transmission (1m-42) In the case of overlapping with the transmission resource for UL transmission or when the UL transmission indication information indicates not to perform eMBB uplink transmission, the eMBB terminal does not perform the eMBB uplink transmission (1m-42).

1m above shows that, when there is eMBB transmission and URLLC transmission in the TDD cell 1m-01, uplink transmission set or scheduled by an upper signal or physical signal in advance to the eMBB terminal through UL transmission indication information is performed or not performed. Although the embodiment of the UL transmission indication information indicating not to do so has been described, it is possible to apply the embodiment to the FDD cell as well. That is, UL transmission indication information telling the eMBB terminal to perform or not to perform uplink transmission on the UL carrier of the FDD cell set or scheduled by higher signal or physical signal transmission on the DL carrier of the FDD cell is transmitted from the DL carrier of the FDD cell to the eMBB. It may be transmitted to the terminal through a physical signal. When the eMBB terminal receives the UL transmission indication information on the DL carrier of the FDD cell, the eMBB terminal receives uplink transmission in the UL carrier of the FDD cell configured or scheduled for the eMBB terminal by transmitting an upper signal or physical signal in advance. It may or may not be performed according to the indication of the UL transmission indication information.

Next, an emergency URLLC uplink transmission from a URLLC terminal to a base station will be described with reference to FIGS. 1O and 1N.

1O is a diagram illustrating a scheme for supporting an emergency URLLC service in TDD.

Contrary to FIG. 1M , when emergency URLLC uplink transmission occurs and transmission is required from the URLLC terminal to the base station, the URLLC terminal needs to inform the base station that the emergency URLLC uplink transmission is performed in the next slot. When the base station knows that emergency URLLC uplink transmission occurs in the next slot, the base station must perform a slot change uplink when the next slot is downlink and transmit a slot change signal. In this case, the URLLC terminal needs a method for notifying the base station that the emergency URLLC uplink transmission is performed. The UE can determine that the emergency URLLC uplink transmission has occurred through each of the following conditions or a combination of conditions.

First, in the upper layer, packet IP or port number can be mapped separately for emergency URLLC upstream data. Accordingly, when data to which the packet IP or port number is mapped enters the buffer, the terminal can determine that emergency URLLC uplink data has occurred.

Second, a specific logical channel ID may be mapped for emergency URLLC uplink data in the upper layer. Accordingly, when data enters the buffer having the logical channel ID, the terminal can determine that emergency URLLC uplink data has occurred.

As described above, when emergency URLLC uplink data or general uplink data is received in the buffer with each logical ID, the terminal can report a BSR (Buffer Status Report) or SR (Scheduling Request) reporting the buffer status from the base station. In this case, it is possible to receive uplink data scheduling from the base station and transmit emergency URLLC uplink data or general uplink data as scheduled through the uplink data scheduling. Alternatively, the emergency URLLC uplink signal described in the present invention may be transmitted to the base station and the emergency URLLC uplink data may be transmitted on an uplink resource previously set as a higher level signal.

In FIG. 1o, TDD (1o-01) information (carrier frequency BW and location information, etc.) may be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal may be transmitted from the TDD cell when the TDD cell is stand-alone or When the TDD cell is not stand-alone, the information can be obtained through acquisition of synchronization from another cell and reception of essential system information. The 5G capable terminal attempts to acquire synchronization and essential system information, acquires random access related information through the received essential system information, and attempts random access from the TDD cell or another cell.

In FIG. 1o, FIGS. 1o-02 and 1o-03 show a self-contained slot structure. 1o-02 is composed of a downlink part, a guard (GP), and an uplink part. In the downlink part, an RS, a downlink control channel, etc. can be transmitted, and the guard includes a propagation delay and a communication between the terminal and the base station. This is to ensure the RF switching time, and the uplink part may transmit RS, an uplink data channel, an uplink control channel, and the like. 1o-03 is composed of a downlink part, a guard (GP), and an uplink part. In the downlink part, RS, a downlink control channel, a downlink data channel, etc. can be transmitted, and the guard is a function of propagation time and the communication between the terminal and the base station. This is to ensure the RF switching time, and RS and an uplink control channel may be transmitted in the uplink part. An important difference between FIG. 1o-02 and FIG. 1o-03 is that an uplink data channel may be transmitted in FIG. 1o-02 and a downlink data channel may be transmitted in FIG. 1o-03. An important similarity between FIGS. 1o-02 and 1o-03 is that they both contain an upstream part at the end ( FIGS. 1o-21 and 1o-22 ). When Figs. 1e and 1f, which can dynamically change the slot of the TDD 1o-01 up and down, are applied, Fig. 1o-02 can be operated as an uplink slot and Fig. 1o-03 can be operated as a downlink slot. The UE may receive information on the uplink slot (FIG. 1o-02) and the downlink slot (FIG. 1o-03) through a common downlink control channel or a dedicated downlink control channel.

In the uplink slot (FIG. 1o-02) and the downlink slot (FIG. 1o-03), the terminal is a signal to inform that emergency URLLC uplink transmission is performed in FIGS. It is referred to as an emergency URLLC uplink signal.) can be transmitted. The first method includes a scheduling request and an emergency URLLC uplink signal in one uplink control channel and transmits them in FIGS. 1o-21 or 1o-22. Accordingly, the uplink control channel can transmit a scheduling request and an emergency URLLC uplink signal by using 1-bit or 2-bit information. Alternatively, it is possible to transmit over other transmission resources by including 1-bit information, setting to use another transmission resource, and depending on whether the UE transmits a scheduling request or an emergency URLLC uplink signal. Alternatively, it is possible for the UE to transmit a scheduling request and an emergency URLLC transmission signal through a separate uplink control channel. The reason for separately designing the scheduling request and the emergency URLLC uplink signal is that the URLLC terminal does not always transmit the uplink signal that must always satisfy the ultra-delay requirement. For example, when the terminal transmits RRC configuration information or capability information of the terminal uplink, the terminal transmits the scheduling request to the base station instead of the emergency URLLC uplink signal because the information can be transmitted through normal uplink transmission. Alternatively, when the UE needs uplink data transmission through the UL grant, it transmits a scheduling request to the base station instead of the emergency URLLC uplink signal. When the UE requires uplink data transmission without a UL grant, an emergency URLLC uplink signal may be transmitted to the base station.

Next, a method of supporting the operation of another service in a situation where the emergency URLLC service is supported in dynamic TDD will be described with reference to FIG. 1N .

FIG. 1N is a diagram illustrating an operation of another service in a situation in which an emergency URLLC service is supported in TDD according to a second embodiment.

Dynamic TDD transmission in FIG. 1N means subframe operation that can be dynamically changed up and down, and follows the method described in FIGS. 1E and 1F. The base station can set the dynamic TDD transmission configuration to the terminal as a higher-order signal, and the terminal receiving the higher-order signal knows that subframes can be dynamically changed up and down according to the dynamic TDD transmission, and thus a common and dedicated downlink control channel perform decoding on If the higher-order signal is not configured, the terminal determines the upper and lower subframe positions according to the UL-DL configuration set by the SIB, and performs decoding on common and downlink control channels in the downlink subframe.

Urgent URLLC transmission is a service that requires ultra-delay requirements. The base station may set the emergency URLLC transmission setting according to the ultra-delay requirement to the URLLC terminal as an upper level signal, and the URLLC terminal receiving the upper level signal may perform an operation according to the emergency URLLC transmission/reception. When the higher-order signal is not configured, the URLLC terminal may perform general data transmission/reception with the base station.

In FIG. 1n, TDD (1n-01) information (carrier frequency BW and location information, etc.) may be transmitted from a 5G base station to a 5G capable terminal, and the 5G capable terminal may be transmitted from the TDD cell when the TDD cell is stand-alone or When the TDD cell is not stand-alone, the information can be obtained through acquisition of synchronization from another cell and reception of essential system information. The 5G capable terminal attempts to acquire synchronization and essential system information, acquires random access related information through the received essential system information, and attempts random access from the TDD cell or another cell.

When the eMBB service and the URLLC service are simultaneously supported in the TDD cell 1n-01, data transmission/reception is performed for the eMBB service by a slot, and data transmission/reception is performed for the URLLC service by a slot or subslot (or mini-slot) do. A slot is composed of 7 or 14 OFDM symbols, and a subslot (or mini-slot) can be composed of fewer OFDM symbols than a slot. suitable to satisfy The number of OFDM symbols of the slot or subslot may be defined in a standard for each subcarrier interval, or various numbers may be defined and configured from the base station to the terminal using higher-order signals or system information. The UE may obtain the number and length of OFDM symbols of a slot or subslot by receiving the higher-order signal or system information.

1n-02 to 1n-06 are examples showing that emergency URLLC uplink transmission is transmitted from the terminal to the URLLC base station and emergency URLLC downlink transmission is transmitted from the base station to the URLLC terminal in a specific slot. A method of informing the base station of the emergency URLLC uplink transmission generated from the terminal follows the method described with reference to FIG. 1o. Before the emergency URLLC uplink transmission occurs, a slot in which URLLC transmission is to be performed is determined to be downlink, so that downlink data transmission of the eMBB terminal can be scheduled in the previous downlink slot. Alternatively, it may be a valid slot for measuring channel information. However, when emergency uplink URLLC transmission is generated from the terminal and needs to be transmitted in the slot, the base station must change the slot from downlink to uplink to enable emergency uplink URLLC transmission. Accordingly, the eMBB downlink transmission scheduled in the previous slot described above cannot be performed in the corresponding slot, and the corresponding slot is no longer valid for channel information measurement. Therefore, the present invention proposes a solution when the validity of a slot for eMBB downlink transmission or channel information measurement is impossible or no longer valid due to emergency uplink URLLC transmission.

When a specific slot needs to be changed from downlink to uplink due to emergency URLLC uplink transmission, the base station may transmit a slot change signal to all terminals in the cell through a common downlink control channel. Alternatively, a slot change signal may be transmitted through a dedicated downlink control channel to specific terminals for which eMBB downlink transmission is to be performed in the slot. Alternatively, DL reception indication information indicating whether or not the eMBB downlink reception operation can still be performed through a common or dedicated downlink control channel may be transmitted to terminals that need to perform the eMBB downlink reception operation in the slot. The slot change signal is a signal including information indicating that the slot is changed to an uplink or downlink. Upon receiving the DL reception indication information or the slot change signal, the eMBB terminal operates according to the scheme presented in the present invention. A terminal operation is proposed through 1n-03 to 1n-06.

1n-03 is a diagram for explaining an operation of measuring channel information according to whether the slot is valid or invalid for measuring channel information when the eMBB terminal measures channel information in downlink slot 4; In addition, 1n-03 is an example when the eMBB terminal supports the URLLC function or when the eMBB terminal receives an indication or DL reception indication information for a URLLC transmission resource. In the above, the indication for the URLLC transmission resource includes information on an emergency URLLC transmission resource for transmitting data within the maximum delay time that the URLLC must satisfy, such as a URLLC transmission frequency resource, a time resource, or a resource setting period. The DL reception indication information is information indicating whether a DL reception operation scheduled or configured in a previous slot can be performed to the eMBB terminal when a plurality of URLLC transmissions are performed. For example, as 1-bit information, 0 may indicate information indicating not to perform DL reception, and 1 may indicate information indicating that DL reception may be performed. Therefore, in the case of a terminal supporting the eMBB and URLLC, as described above, when receiving an upper level signal for setting an emergency URLLC, or when the eMBB terminal receives an indication for a URLLC transmission resource, or receiving DL reception indication information. In this case, the operation described in this example may be followed. The indication or DL reception indication information for the URLLC transmission resource may be transmitted during emergency URLLC transmission or after emergency URLLC transmission from the base station through an upper signal or a common/dedicated downlink control channel, and the eMBB terminal may receive the indication. there is.

In the first scheme for the operation of the eMBB terminal, in 1n-03, the eMBB terminal receives the slot change signal from the base station and determines that the downlink slot is changed to the uplink. After receiving an indication for the emergency uplink URLLC transmission resource 1n-22 or the emergency URLLC uplink transmission resource, the received URLLC transmission resource 1n-22 and the RS resource 1n-21 for channel information measurement overlap. It is determined that the slot is not valid for channel information measurement, and channel information measurement is not performed in the slot. If, as in 1n-04, an indication for an emergency uplink URLLC transmission resource (1n-31) or an emergency URLLC uplink resource is received, the received URLLC transmission resource (1n-31) and an RS resource (1n-32) for channel information measurement If these do not overlap (the URLLC resource and the RS are separated in frequency), it is determined that the slot is valid for channel information measurement, and channel information measurement is performed in the slot. In addition, if an indication for an emergency uplink URLLC transmission resource (1n-42) or an emergency URLLC uplink resource is received as in 1n-05, the received URLLC transmission resource (1n-42) and an RS resource for channel information measurement (1n- 41) does not overlap (the URLLC resource and the RS are separated in time), it is determined that the slot is valid for channel information measurement, and channel information measurement is performed in the slot.

The second scheme for the operation of the eMBB terminal is that the terminal receives an indication of an emergency URLLC downlink control channel (1n-24) or an emergency URLLC downlink resource in the downlink slot 4, and the transmission resource of the received URLLC data (1n-24) is If it overlaps with RS resources 1n-23 for channel information measurement, it is determined that the slot is not valid for channel information measurement. If the terminal receives an indication of the emergency URLLC downlink control channel (1n-33) or the emergency URLLC downlink resource as in 1n-04, the received emergency downlink URLLC transmission resource (1n-33) and the RS resource for channel information measurement If (1n-34) does not overlap (the URLLC resource and RS are separated in frequency), it is determined that the slot is valid for channel information measurement, and channel information measurement is performed in the slot.

In 1n-06, the eMBB terminal receives the slot change signal from the base station and determines that the downlink slot is changed to the uplink. Afterwards, the first plan for the operation of the eMBB terminal is that the eMBB terminal does not receive the multi-slot scheduled downlink data 1n-51 during K slots in the previous downlink slot. The URLLC terminal performs emergency URLLC uplink transmission (1n-52) in Subslot 3. Therefore, the base station completes multi-slot data transmission during K slots by performing transmission that is not counted due to emergency URLLC uplink transmission in the nearest downlink slot. The eMBB terminal receives downlink data in the nearest downlink slot and completes multi-slot data reception during K slots.

1n above, when there is eMBB transmission and URLLC transmission in the TDD cell 1n-01, a downlink reception operation set or scheduled by an upper signal or a physical signal in advance is performed or scheduled to the eMBB terminal through DL reception indication information. Although the embodiment of the DL reception indication information indicating not to do has been described, it is possible to apply the embodiment to the FDD cell as well. That is, DL reception indication information telling the eMBB terminal to perform or not to perform downlink reception on the DL carrier of the FDD cell set or scheduled by transmission of an upper signal or physical signal in the DL carrier of the FDD cell is transmitted from the DL carrier of the FDD cell to the eMBB. It may be transmitted to the terminal through a physical signal. When the eMBB terminal receives the DL reception indication information on the DL carrier of the FDD cell, the eMBB terminal performs a downlink reception operation on the DL carrier of the FDD cell configured or scheduled for the eMBB terminal by transmitting an upper signal or a physical signal in advance. It may or may not be performed according to an indication of the received DL reception indication information.

Next, Figure 1k is a view showing a base station apparatus according to the present invention.

The controller 1k-01 is a base station procedure according to FIGS. 1g and 1j of the present invention, a TDD operation method for each subframe type according to FIGS. 1e, 1f, 1h, and 1i of the present invention, and a future compatible subframe operation method for each subframe type Alternatively, in a situation in which the emergency URLLC service according to FIGS. 1M, 1O, and 1N is supported, 5G resource allocation is controlled according to the method for supporting the eMBB terminal, and transmitted to the terminal through the 5G resource allocation information transmitter 1k-05 and schedules 5G data in 5G resources in the scheduler 1k-03, and transmits and receives 5G data to and from the 5G terminal through the 5G data transmission/reception device 1k-07.

Next, FIG. 11 is a diagram illustrating a terminal device according to the present invention.

The terminal procedure according to Figs. 1g and 1j of the present invention, the TDD operation method for each subframe type and the future compatibility subframe operation method for each subframe type according to Figs. 1e, 1f, 1h, 1i of the present invention, or Figs. 1m, 1o, In accordance with a method of supporting an eMBB terminal in a situation where the emergency URLLC service according to FIG. 1N is supported, 5G resource allocation is received from the base station through the 5G resource allocation information receiving device 11-05, and the controller 11-01 is allocated 5G data scheduled in the 5G resource is transmitted and received with the 5G base station through the 5G data transmission/reception device 11-06.

In addition, the embodiments disclosed in the present specification and drawings are merely provided for specific examples to easily explain and help understanding of the contents of the present invention, and are not intended to limit the scope of the present invention. Therefore, the scope of the present invention should be construed as including all changes or modifications derived based on the technical idea of the present invention in addition to the embodiments disclosed herein are included in the scope of the present invention.

Claims (16)

In a method performed by a terminal in a communication system,
confirming that first data associated with a first logical channel identifier to be transmitted exists;
identifying a first resource for transmitting a first scheduling request (SR) related to transmission of the first data;
Transmitting the first scheduling request to a base station using the first resource,
The first resource is identified based on the first logical channel identifier. The method of claim 1, wherein the service type related to the first data is identified based on the first logical channel identifier. The method of claim 1, wherein the first resource is configured for higher layer signaling. According to claim 1,
identifying a second resource for transmitting a second scheduling request related to transmission of second data;
transmitting the second scheduling request to the base station using the second resource;
The second resource is identified based on a second logical channel identifier. In a method performed by a base station in a communication system,
identifying a first resource for receiving a first scheduling request (SR) related to reception of first data; and
Receiving the first scheduling request from a terminal using the first resource,
the first data is associated with a first logical channel identifier;
The first resource is related to the first logical channel identifier. 6. The method of claim 5, wherein the service type related to the first data is identified based on the first logical channel identifier. The method of claim 5, further comprising transmitting configuration information for the first resource through higher layer signaling. 6. The method of claim 5,
identifying a second resource for receiving a second scheduling request related to reception of second data; and
Receiving the second scheduling request from the terminal using the second resource,
The second resource is associated with a second logical channel identifier associated with the second data. In the terminal of a communication system,
transceiver; and
confirming that first data associated with a first logical channel identifier to be transmitted exists;
Checking a first resource for transmitting a first scheduling request (SR) related to the transmission of the first data,
a control unit connected to the transceiver for controlling to transmit the first scheduling request to a base station using the first resource;
The first resource is a terminal, characterized in that it is identified based on the first logical channel identifier. The terminal of claim 9, wherein the service type related to the first data is identified based on the first logical channel identifier. The terminal of claim 9, wherein the first resource is configured as higher layer signaling. 10. The method of claim 9,
The control unit identifies a second resource for transmitting a second scheduling request related to transmission of second data,
Further controlling to transmit the second scheduling request to the base station using the second resource,
The second resource is a terminal, characterized in that it is identified based on a second logical channel identifier. In a base station of a communication system,
transceiver; and
Checking a first resource for receiving a first scheduling request (scheduling request, SR) related to the reception of the first data,
a control unit connected to the transceiver for controlling to receive the first scheduling request from the terminal using the first resource;
the first data is associated with a first logical channel identifier;
The first resource is related to the first logical channel identifier. The base station of claim 13, wherein the service type related to the first data is identified based on the first logical channel identifier. The base station according to claim 13, wherein the control unit further controls to transmit configuration information for the first resource through higher layer signaling. 14. The method of claim 13,
The control unit identifies a second resource for receiving a second scheduling request related to reception of second data,
Further control to receive the second scheduling request from the terminal using the second resource,
The second resource is related to a second logical channel identifier related to the second data.

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