WO2019190265A1

WO2019190265A1 - Method and apparatus for controlling transmission power of uplink data channel

Info

Publication number: WO2019190265A1
Application number: PCT/KR2019/003709
Authority: WO
Inventors: 박규진
Original assignee: 주식회사 케이티
Priority date: 2018-03-30
Filing date: 2019-03-29
Publication date: 2019-10-03
Also published as: KR102493165B1; KR20220024243A

Abstract

The present embodiments provide a method and an apparatus for efficiently multiplexing uplink data transmission resources between terminals having different latency requirements, or efficiently controlling power of an uplink data channel in terminals having different latency requirements.

Description

Uplink data channel transmission power control method and apparatus

The present embodiments propose a method and apparatus for controlling transmission power of an uplink data channel in a next generation wireless access network (hereinafter referred to as "NR").

3GPP recently approved a study item "Study on New Radio Access Technology" for the study of next-generation radio access technology (that is, 5G radio access technology), and based on this, the RAN WG1 for each NR (New Radio) Designs for frame structures, channel coding & modulation, waveforms and multiple access schemes are in progress. NR is required to be designed to satisfy various QoS requirements required for each detailed and detailed service scenario as well as improved data rate compared to LTE / LTE-Advanced.

As typical service scenarios for NR, enhancement mobile broadband (eMBB), massive machine type communication (MMTC), and ultra reliable and low latency communications (URLLC) are defined, and each service scenario satisfies the needs. As a method for doing so, a flexible frame structure design is required compared to LTE / LTE-Advanced.

Each service scenario has different requirements for data rates, latency, reliability, coverage, and so on, through frequency bands that make up any NR system. As a method for efficiently satisfying the needs of each usage scenario, based on different numerology (for example, subcarrier spacing, subframe, transmission time interval, etc.) There is a need for a method of efficiently multiplexing radio resource units of a network.

An object of the present embodiments is to provide a method and apparatus for efficiently controlling the transmission power of an uplink data channel in a next generation wireless network.

According to an aspect of the present invention, there is provided a method of controlling a transmission power of an uplink data channel by a terminal, the method comprising: transmitting an uplink data channel according to a first transmission power control, an uplink discontinuous TPC command And adjusting the transmit power of the uplink data channel being transmitted to the second transmit power control based on the uplink discontinuous TPC command. A method of controlling an uplink data channel of a network, comprising: configuring monitoring configuration information for an uplink discontinuous TPC command, transmitting the monitoring configuration information to a terminal transmitting an uplink data channel, and based on monitoring configuration information Providing a method comprising transmitting an uplink discontinuous TPC command .

Further, an embodiment of the present invention provides a terminal for transmitting uplink data, the terminal transmitting an uplink data channel according to a first transmission power control, a receiver for receiving an uplink discontinuous TPC command, and an uplink discontinuous TPC command. It provides a terminal including a control unit for adjusting the transmission power of the uplink data channel being transmitted to the second transmission power control.

In addition, an embodiment is a base station for controlling uplink data transmission of a terminal, the control unit for configuring the monitoring configuration information for the uplink discontinuous TPC command and the monitoring configuration information to the terminal transmitting the uplink data channel And a transmitter for transmitting the uplink discontinuous TPC command based on the monitoring configuration information.

In addition, according to an embodiment of the present invention, a method of controlling transmission power of an uplink data channel by a terminal includes applying different power control to transmission of an uplink data channel and using an uplink data channel to which different power control is applied. It provides a method comprising the step of transmitting.

In addition, according to an embodiment of the present invention, a method of receiving an uplink data channel by a base station, explicitly transmitting or implicitly instructing the terminal to control information indicating different power control on the uplink data channel and uplink. It provides a method comprising receiving an uplink data channel applying different power control to the link data channel.

In addition, an embodiment of the terminal for controlling the transmission power of the uplink data channel, a control unit for applying different power control to the uplink data channel and a transmission unit for transmitting the uplink data channel to which different power control is applied. It provides a terminal.

In addition, an embodiment is a base station for receiving an uplink data channel, and a transmitter and an uplink data channel for explicitly transmitting or implicitly instructing the terminal control information indicating different power control to the uplink data channel. Provided is a base station including a receiver for receiving an uplink data channel to which different power control is applied.

According to the embodiments, it is possible to efficiently control the transmission power of the uplink data channel in the next generation wireless network.

1 is a diagram schematically illustrating a structure of an NR wireless communication system to which an embodiment of the present invention may be applied.

2 is a view for explaining a frame structure in an NR system to which the present embodiment can be applied.

3 is a diagram for describing a resource grid supported by a radio access technology to which the present embodiment can be applied.

FIG. 4 is a diagram for describing a bandwidth part supported by a radio access technology to which the present embodiment can be applied.

5 is a diagram exemplarily illustrating a synchronization signal block in a radio access technology to which the present embodiment can be applied.

6 is a diagram for explaining a random access procedure in a radio access technology to which the present embodiment can be applied.

7 is a diagram for explaining CORESET.

FIG. 8 is a diagram illustrating an example of symbol level alignment among different SCSs in different SCSs to which the present embodiment can be applied.

FIG. 10 is a diagram illustrating an embodiment of UL cancellation to which Embodiment 1 can be applied.

FIG. 11 is a diagram illustrating another embodiment of UL cancellation to which Embodiment 1 can be applied. FIG.

FIG. 12 is a diagram illustrating another embodiment of uplink cancellation (UL cancellation) to which Embodiment 1 can be applied.

FIG. 13 is a diagram illustrating another embodiment of uplink cancellation (UL cancellation) to which Embodiment 1 can be applied. FIG.

FIG. 14 is a diagram illustrating an embodiment of PUSCH transmission power readjustment according to a discontinuous TPC command to which Embodiment 2 may be applied.

15 and 16 illustrate another embodiment of PUSCH transmission power readjustment according to a discontinuous TPC command to which Embodiment 2 may be applied.

FIG. 17 is a flowchart illustrating a method for controlling transmission power of an uplink data channel by a terminal in Embodiment 2. FIG.

FIG. 18 is a flowchart illustrating a method for controlling an uplink data channel of a terminal by a base station in Embodiment 2. FIG.

19 is a diagram illustrating a configuration of a base station according to the second embodiment.

20 is a view showing the configuration of a user terminal according to the second embodiment.

21 is a diagram illustrating a concept of a reliability request based multiple transmit power control procedure to which Embodiment 3 may be applied.

FIG. 22 is a flowchart illustrating a method of controlling transmission power of an uplink data channel by a terminal in Embodiment 3. FIG.

23 is a flowchart of a method of a base station receiving an uplink data channel in Embodiment 3;

24 is a diagram showing the configuration of a base station according to the third embodiment.

25 is a diagram showing the configuration of a user terminal according to the third embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are shown in different drawings. In addition, in describing the technical idea, when it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the exemplary embodiments, terms such as first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the terms are not limited in nature, order, order, or number of the components. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but between components It is to be understood that the elements may be "interposed" or each component may be "connected", "coupled" or "connected" through other components.

In addition, terms and technical names used in the present specification are for explaining a specific embodiment, and technical ideas are not limited to the terms. Unless otherwise defined, the terms described below may be interpreted as meanings generally understood by those skilled in the art to which the technical idea belongs. When the term is an incorrect technical term that does not accurately express the technical idea, it should be replaced with a technical term that can be understood by those skilled in the art. In addition, the general terms used herein should be interpreted as defined in the dictionary, or according to the context before and after, and should not be interpreted in an excessively reduced sense.

The wireless communication system herein refers to a system for providing various communication services such as voice and data packets using radio resources, and may include a terminal, a base station, and a core network.

The embodiments disclosed below may be applied to a wireless communication system using various wireless access technologies. For example, the embodiments of the present invention may include code division multiple access (CDMA), frequency division multiple access (FDMA), timedivision multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). It can be applied to various radio access technologies, such as. CDMA may be implemented by a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented in a wireless technology such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like. IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e. UTRA is part of a universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is part of evolved UMTS (E-UMTS) using evolved-UMTS terrestrial radio access (E-UTRA), employing OFDMA in downlink and SC- in uplink FDMA is adopted. As such, the embodiments may be applied to a wireless access technology that is currently disclosed or commercialized, and may be applied to a wireless access technology that is currently under development or will be developed in the future.

Meanwhile, the terminal in the present specification is a comprehensive concept of a device including a wireless communication module for communicating with a base station in a wireless communication system, and includes a UE in WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio). (User Equipment), of course, should be interpreted as a concept that includes a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, and the like in GSM. In addition, the terminal may be a user portable device such as a smart phone according to a usage form, and may mean a vehicle, a device including a wireless communication module in a vehicle, and the like in a V2X communication system. In addition, in the case of a machine type communication (Machine Type Communication) system may mean an MTC terminal, an M2M terminal equipped with a communication module to perform machine type communication.

A base station or a cell of the present specification refers to an end point that communicates with a terminal in terms of a network, and includes a Node-B, an evolved Node-B, an eNB, a gNode-B, a Low Power Node, and an LPN. Sector, site, various types of antenna, base transceiver system (BTS), access point, access point (for example, transmission point, reception point, transmission point and reception point), relay node ), A mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a remote radio head (RRH), a radio unit (RU), and a small cell.

Since the various cells listed above have a base station for controlling each cell, the base station may be interpreted in two meanings. 1) the device providing the mega cell, the macro cell, the micro cell, the pico cell, the femto cell, the small cell in relation to the wireless area, or 2) the wireless area itself. In 1) all devices that provide a given radio area are controlled by the same entity or interact with each other to cooperatively configure the radio area to the base station. According to the configuration of the wireless area, a point, a transmission point, a transmission point, a reception point, and the like become one embodiment of a base station. In 2), the base station may indicate the radio area itself that receives or transmits a signal from the viewpoint of the user terminal or the position of a neighboring base station.

In the present specification, a cell refers to a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

Uplink (UL, or uplink) means a method for transmitting and receiving data to the base station by the terminal, downlink (Downlink, DL, or downlink) means a method for transmitting and receiving data to the terminal by the base station do. Downlink (downlink) may mean a communication or communication path from the multiple transmission and reception points to the terminal, uplink (uplink) may mean a communication or communication path from the terminal to the multiple transmission and reception points. In this case, in the downlink, the transmitter may be part of multiple transmission / reception points, and the receiver may be part of the terminal. In addition, in uplink, a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.

The uplink and the downlink transmit and receive control information through a control channel such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), and the like. Data is transmitted and received by configuring the same data channel. Hereinafter, a situation in which a signal is transmitted and received through a channel such as PUCCH, PUSCH, PDCCH, and PDSCH is described as 'transmit and receive PUCCH, PUSCH, PDCCH, and PDSCH'. do.

For clarity, the following description focuses on the 3GPP LTE / LTE-A / NR (New RAT) communication system, but the technical features are not limited thereto.

After researching 4G (4th-Generation) communication technology, 3GPP is conducting research on 5G (5th-Generation) communication technology to meet the requirements of ITU-R next generation wireless access technology. Specifically, 3GPP is conducting research on a new NR communication technology separate from LTE-A pro and 4G communication technology, in which LTE-Advanced technology is enhanced to meet the requirements of ITU-R as 5G communication technology. LTE-A pro and NR both appear to be submitted in 5G communication technology, but for the convenience of description, the following describes the embodiments of the present invention mainly on NR.

Operational scenarios in NR defined various operational scenarios by adding considerations to satellites, automobiles, and new verticals in the existing 4G LTE scenarios.In terms of services, they have eMBB (Enhanced Mobile Broadband) scenarios and high terminal density. Supports a range of mass machine communication (MMTC) scenarios that require low data rates and asynchronous connections, and Ultra Reliability and Low Latency (URLLC) scenarios that require high responsiveness and reliability and support high-speed mobility. .

In order to satisfy these scenarios, NR has developed a wireless communication system using new waveform and frame structure technology, low latency technology, mmWave support technology, and forward compatible technology. It starts. In particular, the NR system proposes various technological changes in terms of flexibility to provide forward compatibility. The main technical features will be described below with reference to the drawings.

1 is a diagram schematically illustrating a structure of an NR system to which the present embodiment may be applied.

* Referring to Figure 1, NR system is divided into 5G Core Network (5GC) and NR-RAN part, NG-RAN is for the user plane (SDAP / PDCP / RLC / MAC / PHY) and UE (User Equipment) It consists of gNB and ng-eNBs providing a control plane (RRC) protocol termination. The gNB interconnects or gNBs and ng-eNBs are interconnected via an Xn interface. gNB and ng-eNB are each connected to 5GC through the NG interface. The 5GC may be configured to include an access and mobility management function (AMF) that is in charge of a control plane such as a terminal access and mobility control function, and a user plane function (UPF), which is in charge of a control function in user data. NR includes support for sub-6 GHz frequency bands (FR1, Frequency Range 1) and 6 GHz and higher frequency bands (FR2, Frequency Range 2).

gNB means a base station providing the NR user plane and control plane protocol termination to the terminal, ng-eNB means a base station providing the E-UTRA user plane and control plane protocol termination to the terminal. The base station described in the present specification should be understood to mean gNB and ng-eNB, and may be used to mean gNB or ng-eNB.

In NR, a CP-OFDM waveform using a cyclic prefix is used for downlink transmission, and a CP-OFDM or DFT-s-OFDM is used for uplink transmission. OFDM technology is easy to combine with Multiple Input Multiple Output (MIMO), and has the advantage of using a low complexity receiver with high frequency efficiency.

On the other hand, in NR, since the requirements for data rate, delay rate, and coverage are different for each of the three scenarios described above, it is necessary to efficiently satisfy the requirements for each scenario through a frequency band constituting an arbitrary NR system. . To this end, a technique for efficiently multiplexing a plurality of different numerology-based radio resources has been proposed.

Specifically, the NR transmission neuron is determined based on sub-carrier spacing and cyclic prefix (CP), based on 15khz as shown in Table 1 below.

The value is used as an exponent value of 2 and is changed exponentially.

As shown in Table 1 above, the NR's neuronality may be classified into five types according to the subcarrier spacing. This is different from the fixed subcarrier spacing of LTE, which is one of 4G communication technologies, to be 15 kHz. Specifically, the subcarrier spacing used for data transmission in NR is 15, 30, 60, 120khz, and the subcarrier spacing used for synchronization signal transmission is 15, 30, 120, 240khz. In addition, the extended CP is applied only to the 60khz subcarrier interval. On the other hand, the frame structure (frame) in NR is a frame having a length of 10ms consisting of 10 subframes having the same length of 1ms (frame) is defined. One frame may be divided into half frames of 5 ms, and each half frame includes five subframes. In the case of a 15khz subcarrier interval, one subframe consists of one slot, and each slot consists of 14 OFDM symbols. 2 is a view for explaining a frame structure in an NR system to which the present embodiment can be applied. Referring to FIG. 2, the slot is fixedly configured with 14 OFDM symbols in the case of a normal CP, but the length of the slot may vary depending on the subcarrier spacing. For example, in the case of a newerology with a 15khz subcarrier spacing, the slot has a length of 1 ms and the same length as the subframe. On the contrary, in the case of a numerology having a 30khz subcarrier spacing, the slot includes 14 OFDM symbols, but two slots may be included in one subframe with a length of 0.5 ms. That is, the subframe and the frame are defined with a fixed time length, the slot is defined by the number of symbols, the time length may vary according to the subcarrier interval. Meanwhile, NR defines a basic unit of scheduling as a slot, and also introduces a mini slot (or subslot or non-slot based schedule) to reduce transmission delay of a radio section. The use of a wide subcarrier spacing shortens the length of one slot in inverse proportion, thereby reducing the transmission delay in the radio section. The mini slot (or sub slot) is for efficient support for the URLLC scenario and can be scheduled in units of 2, 4, and 7 symbols.

In addition, unlike LTE, NR defines uplink and downlink resource allocation at a symbol level in one slot. In order to reduce the HARQ delay, a slot structure capable of transmitting HARQ ACK / NACK directly within a transmission slot has been defined, and this slot structure will be described as a self-contained structure.

NR is designed to support a total of 256 slot formats, of which 62 slot formats are used in the Rel-15. In addition, a combination of various slots supports a common frame structure constituting an FDD or TDD frame. For example, a slot structure in which all symbols of a slot are set to downlink, a slot structure in which all symbols are set to uplink, and a slot structure in which downlink symbol and uplink symbol are combined are supported. NR also supports that data transmission is distributed and scheduled in one or more slots. Accordingly, the base station can inform the terminal whether the slot is a downlink slot, an uplink slot, or a flexible slot by using a slot format indicator (SFI). The base station may indicate a slot format by indicating an index of a table configured through UE-specific RRC signaling using SFI, and may indicate dynamically through downlink control information (DCI) or statically or quasi-statically through RRC. You may.

With regard to physical resources in NR, antenna ports, resource grids, resource elements, resource blocks, bandwidth parts, etc. are considered Can be.

The antenna port is defined such that the channel on which the symbol is carried on the antenna port can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale property of a channel on which a symbol on one antenna port is carried can be deduced from the channel on which the symbol on another antenna port is carried, then the two antenna ports are quasi co-located or QC / QCL. quasi co-location relationship. Here, the broad characteristics include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

Referring to FIG. 3, since the Resource Grid supports a plurality of numerologies in the same carrier, a resource grid may exist according to each numerology. In addition, the resource grid may exist according to the antenna port, subcarrier spacing, and transmission direction.

The resource block is composed of 12 subcarriers and is defined only in the frequency domain. In addition, a resource element is composed of one OFDM symbol and one subcarrier. Accordingly, as shown in FIG. 3, one resource block may vary in size depending on the subcarrier spacing. In addition, the NR defines "Point A" serving as a common reference point for the resource block grid, a common resource block, a virtual resource block, and the like.

In NR, unlike LTE, where the carrier bandwidth is fixed at 20Mhz, the maximum carrier bandwidth is set from 50Mhz to 400Mhz for each subcarrier interval. Therefore, it is not assumed that all terminals use all of these carrier bandwidths. Accordingly, in the NR, as shown in FIG. 4, the bandwidth part can be designated within the carrier bandwidth and used by the terminal. In addition, the bandwidth part is associated with one neuralology and consists of a subset of consecutive common resource blocks, and can be dynamically activated over time. The UE is configured with up to four bandwidth parts, respectively, uplink and downlink, and data is transmitted and received using the bandwidth part activated at a given time.

In the case of paired spectrum, uplink and downlink bandwidth parts are set independently, and in the case of unpaired spectrum, to prevent unnecessary frequency re-tunning between downlink and uplink operation. For this purpose, the bandwidth parts of the downlink and the uplink are configured in pairs so as to share the center frequency.

In NR, the UE performs a cell search and random access procedure to access and communicate with a base station.

Cell search is a procedure in which a terminal synchronizes with a cell of a corresponding base station, obtains a physical layer cell ID, and acquires system information by using a synchronization signal block (SSB) transmitted by a base station.

Referring to FIG. 5, an SSB is composed of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), which occupy one symbol and 127 subcarriers, respectively, three OFDM symbols, and a PBCH spanning 240 subcarriers. .

The terminal monitors the SSB in the time and frequency domain to receive the SSB.

SSB can be transmitted up to 64 times in 5ms. A plurality of SSBs are transmitted in different transmission beams within 5ms, and the UE performs detection assuming that SSBs are transmitted every 20ms based on a specific beam used for transmission. The number of beams available for SSB transmission within 5 ms time may increase as the frequency band increases. For example, up to 4 SSB beams can be transmitted at 3 GHz or less, and up to 8 different SSBs can be transmitted at a frequency band of 3 to 6 GHz and up to 64 different beams at a frequency band of 6 GHz or more.

Two SSBs are included in one slot, and the start symbol and the number of repetitions in the slot are determined according to the subcarrier spacing.

On the other hand, SSB is not transmitted at the center frequency of the carrier bandwidth, unlike the SS of the conventional LTE. That is, the SSB may be transmitted even where the center of the system band is not, and when supporting broadband operation, a plurality of SSBs may be transmitted in the frequency domain. Accordingly, the terminal monitors the SSB using a synchronization raster, which is a candidate frequency position for monitoring the SSB. The carrier raster and the synchronization raster, which are the center frequency position information of the channel for initial access, are newly defined in the NR, and the synchronization raster has a wider frequency interval than the carrier raster, and thus supports fast SSB search of the terminal. Can be.

The UE may acquire the MIB through the PBCH of the SSB. The Master Information Block (MIB) includes minimum information for the UE to receive the remaining system information (RMSI) that the network broadcasts. In addition, the PBCH may include information on the position of the first DM-RS symbol on the time-domain, information for the UE to monitor SIB1 (for example, SIB1 neuronological information, information related to SIB1 CORESET, search space information, PDCCH related parameter information, etc.), offset information between the common resource block and the SSB (the position of the absolute SSB in the carrier is transmitted through SIB1), and the like. Here, the SIB1 neuronological information is equally applied to message 2 and message 4 of the random access procedure for accessing the base station after the terminal completes the cell search procedure.

The aforementioned RMSI means System Information Block 1 (SIB1), and SIB1 is broadcast periodically (ex, 160 ms) in a cell. SIB1 includes information necessary for the UE to perform an initial random access procedure and is periodically transmitted through the PDSCH. In order to receive the SIB1, the UE needs to receive the information of the neuterology used for the SIB1 transmission and the control resource set (CORESET) information used for scheduling the SIB1 through the PBCH. The UE checks scheduling information on SIB1 using SI-RNTI in CORESET and acquires SIB1 on PDSCH according to the scheduling information. The remaining SIBs other than SIB1 may be transmitted periodically or may be transmitted at the request of the terminal.

Referring to FIG. 6, when the cell search is completed, the terminal transmits a random access preamble for random access to the base station. The random access preamble is transmitted on the PRACH. Specifically, the random access preamble is transmitted to the base station through a PRACH composed of consecutive radio resources in a specific slot that is periodically repeated. In general, when a UE initially accesses a cell, a contention-based random access procedure is performed, and when a UE performs random access for beam failure recovery (BFR), a contention-free random access procedure is performed.

The terminal receives a random access response to the transmitted random access preamble. The random access response may include a random access preamble identifier (ID), an uplink grant (UL Grant), a temporary Temporary Cell-Radio Network Temporary Identifier (C-RNTI), and a time alignment command (TAC). Since one random access response may include random access response information for one or more terminals, a random access preamble identifier may be included to indicate to which terminal the included uplink grant, temporary C-RNTI, and TAC are valid. . The random access preamble identifier may be an identifier for the random access preamble received by the base station. The TAC may be included as information for the UE to adjust uplink synchronization. The random access response may be indicated by a random access identifier on the PDCCH, that is, a random access-radio network temporary identifier (RA-RNTI).

The terminal receiving the valid random access response processes the information included in the random access response and performs the scheduled transmission to the base station. For example, the terminal applies a TAC and stores a temporary C-RNTI. In addition, by using the uplink grant, data stored in the buffer of the terminal or newly generated data is transmitted to the base station. In this case, information that can identify the terminal should be included.

Finally, the terminal receives a downlink message for contention resolution.

The downlink control channel in NR is transmitted in a control resource set (CORESET) having a length of 1 to 3 symbols, and transmits up / down scheduling information, slot format index (SFI), and transmit power control (TPC) information. .

As such, the NR introduces the concept of CORESET to ensure system flexibility. CORESET (Control Resource Set) means a time-frequency resource for the downlink control signal. The terminal may decode the control channel candidate using one or more search spaces in the CORESET time-frequency resource. The QCL (Quasi CoLocation) assumption for each CORESET has been set, which is used to inform the analog beam direction in addition to the delay spread, Doppler spread, Doppler shift, and average delay, which are assumed by conventional QCL.

7 is a diagram for explaining CORESET.

Referring to FIG. 7, CORESET may exist in various forms within a carrier bandwidth in one slot, and CORESET may be configured with up to three OFDM symbols on a time-domain. In addition, CORESET is defined as a multiple of six resource blocks up to the carrier bandwidth in the frequency domain.

The first CORESET is indicated through the MIB as part of the initial bandwidth part configuration to receive additional configuration information and system information from the network. After establishing a connection with the base station, the terminal may receive and configure one or more CORESET information through RRC signaling.

In this specification, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals, and various messages related to NR (New Radio). May be interpreted as meaning used in the past or present, or various meanings used in the future.

NR(New Radio) NR (New Radio)

3GPP recently approved a study item "Study on New Radio Access Technology" for the study of next-generation radio access technology (ie 5G radio access technology), and based on this, RAN WG1 has a frame structure for each new radio (NR). (frame structure), channel coding & modulation (waveform & multiple access scheme), etc. design is in progress. The NR is required to be designed to satisfy various QoS requirements required for each detailed and detailed service scenario as well as an improved data rate compared to LTE / LTE-Advanced.

Each service scenario is a frequency constituting an arbitrary NR system because the requirements for data rates, latency, reliability, coverage, etc. are different from each other. A radio resource unit based on different numerology (eg, subcarrier spacing, subframe, TTI, etc.) as a method for efficiently satisfying each service scenario needs through a band. There is a need for a method of efficiently multiplexing the data.

As one method for this, TDM, FDM, or TDM / FDM based on one or a plurality of NR component carriers (s) for numerology having different subcarrier spacing values. As a result, a discussion has been made on a method of supporting multiplexing or multiplexing and a method of supporting one or more time units in configuring a scheduling unit in a time-domain. In this regard, in NR, a subframe is defined as a kind of time-domain structure, and reference numerology is used to define a subframe duration. It is decided to define a single subframe duration consisting of 14 OFDM symbols of 15 kHz sub-carrier spacing (SCS) based normal CP overhead, the same as LTE. Accordingly, in NR, the subframe has a time duration of 1 ms. However, unlike LTE, subframes of NR are absolute reference time durations, and slots and mini-slots are time units based on actual uplink / downlink data scheduling. ) Can be defined. In this case, the number of OFDM symbols and the y value of the corresponding slot are determined to have a value of y = 14 regardless of the SCS value in the case of normal CP.

Accordingly, any slot consists of 14 symbols, and according to the transmission direction of the slot, all symbols are used for DL transmission or all symbols are UL transmission (UL). It may be used for transmission or in the form of a downlink portion (DL portion) + a gap (gap) + uplink portion (UL portion).

In addition, a short slot time-domain scheduling interval for uplink / downlink data transmission and reception is defined based on a minislot consisting of fewer symbols than the slot in an arbitrary number (numerology) (or SCS). A domain scheduling interval may be set, or a long time-domain scheduling interval for up / downlink data transmission / reception may be configured through slot aggregation.

Particularly, in case of transmission / reception of latency critical data such as URLLC, it is based on 1ms (14 symbols) defined in a numerology-based frame structure with small SCS value such as 15kHz. When scheduling is performed by slot unit, it may be difficult to satisfy the latency requirement, so for this purpose, a mini slot consisting of fewer OFDM symbols than the corresponding slot is defined and based on this, critical to the same delay rate as the corresponding URLLC. (latency critical) may be defined so that scheduling is performed for data.

Alternatively, as described above, by supporting multiplexing or multiplexing by using a TDM and / or FDM method, a number of neurons having different SCS values in one NR carrier are supported. Scheduling data according to latency requirements based on slots (or mini slots) lengths defined for each cell is also considered. For example, as shown in FIG. 8 below, when the SCS is 60 kHz, since the symbol length is reduced by about 1/4 compared to the case of the SCS 15 kHz, when one slot is formed of the same 14 OFDM symbols, The slot length is 1ms, while the 60kHz-based slot length is reduced to about 0.25ms.

As described above, in NR, a method of satisfying the requirements of URLLC and eMBB by defining different SCSs or different TTI lengths is being discussed.

PDCCH PDCCH

In NR and LTE / LTE-A systems, L1 control information such as DL assignment Downlink Control Information (DCI) and UL Grant DCI is transmitted and received through a PDCCH. A control channel element (CCE) is defined as a resource unit for transmitting the PDCCH, and in the NR, a control resource set (CORESET), which is a frequency / time resource for transmitting the PDCCH, may be set for each terminal. In addition, each CORESET may be configured with one or more search spaces consisting of one or more PDCCH candidates for monitoring the PDCCH.

Power control Power control

In NR and LTE / LTE-A systems, uplink transmission power of a terminal is determined by a maximum transmission power value, a higher layer parameter, a path loss, and a TPC command value transmitted through a downlink control channel. .

상향링크 전송 절차 Uplink Transmission Procedure

The uplink control channel in * NR may be divided into a short PUCCH and a long PUCCH structure supporting different symbol lengths in consideration of transmission delay and requirements for coverage. In addition, various options are provided for the start symbol position and symbol length of the PUCCH in consideration of a symbol-level flexible resource configuration scheme. In addition, it supports functions such as on / off control DM-RS overhead setting for frequency hopping of the PUCCH.

In NR, the PUSCH resource allocation method of the existing LTE / LTE-A system and the UL grant-based slot-based PUSCH transmission identical to the PUSCH transmission operation of the UE and the mapping type A corresponding to the DM-RS transmission type In addition, non-slot-based (ie, mini-slot-based) PUSCH transmission, and thus DM-RS transmission type mapping type (mapping type) B and aggregated slot (aggregated-slot) -based PUSCH transmission, Various types of PUSCH transmission methods have been defined, such as grant-free PUSCH transmission.

보다 넓은 대역폭 동작(Wider bandwidth operations)Wider bandwidth operations

In the existing LTE system, a scalable bandwidth operation for any LTC CC is supported. That is, according to the frequency deployment scenario (deployment scenario) in any LTE carrier to configure a single LTE CC, a minimum bandwidth of 1.4 MHz to 20 MHz could be configured, the normal LTE terminal is one LTE For the CC, the transmit / receive capability of 20 MHz bandwidth was supported.

However, in the case of NR, the design is made to support NR terminals having different transmit / receive bandwidth capabilities through one wideband NR CC. Likewise, by configuring one or more bandwidth parts (BWP, bandwidth part (s)) composed of granular bandwidths for an arbitrary NR CC, a flexible (Bandwidth part configuration) and activation through different bandwidth part configuration (activation) for each terminal There is a need to support flexible bandwidth operation (wider bandwidth operation).

In more detail, in NR, one or more bandwidth parts may be configured through one serving cell configured from a terminal perspective, and the corresponding UE may include one downlink bandwidth part (s) in a serving cell. DL bandwidth part) and one uplink bandwidth part (UL bandwidth part) by activation (activation) was defined to be used for transmitting and receiving uplink / downlink data. In addition, when a plurality of serving cells are configured in a corresponding UE, that is, even for a UE to which a CA is applied, one downlink bandwidth part and / or an uplink bandwidth part are activated for each serving cell. By using the radio resources of the corresponding serving cell (serving cell) has been defined to use for transmitting and receiving uplink / downlink data.

In more detail, an initial bandwidth part for an initial access procedure of a terminal is defined in a serving cell, and at least one terminal-specific message may be defined through dedicated RRC signaling for each terminal. A UE-specific bandwidth part (s) may be configured, and a default bandwidth part for a fallback operation may be defined for each terminal.

However, in any serving cell, a plurality of downlink and / or uplink bandwidth parts are simultaneously activated and used according to the capability and bandwidth part (s) configuration of the terminal. In NR rel-15, only one downlink bandwidth part and one uplink bandwidth part may be activated at an arbitrary time in an arbitrary terminal in NR rel-15. .

실시예 1Example 1

Discontinuous Transmission Indication for DL

As a multiplexing method for downlink data of different transmission durations defined in NR, a method of indicating through a group common PDCCH for discontinuous transmission has been defined. That is, when a certain terminal receives the indication information for the discontinuous transmission, the terminal receives some time / frequency of PDSCH transmission resources allocated for the terminal according to the indication information. The presence or absence of preemption for data transmission of other UEs with respect to time / frequency) resources could be confirmed.

The present specification proposes a preemption-based uplink data channel transmission / reception method for efficiently multiplexing uplink data transmission resources between terminals having different latency requirements.

As a service scenario provided by NR and LTE / LTE-A system, it is an efficient support method for URLLC service data that requires low latency / high reliability along with eMBB service data support to maximize data transmission speed. Is increasing in importance.

In particular, in order to transmit the uplink data for URLLC in order to satisfy the requirement for the delay time, a part of the uplink data transmission resource of another terminal that has already been scheduled may be preempted and transmitted similarly to the downlink case described above. For example, during transmission of uplink data by the eMBB terminal, when transmission of uplink data of a URLLC terminal sensitive to a delay rate request is necessary, the URLLC terminal may preemptively transmit a portion of the uplink data transmission resource of the eMBB terminal. have.

To this end, to stop the transmission of the uplink data channel (PUSCH) of the terminal currently transmitting the uplink data and to support the uplink cancellation indication (Uplink cancellation indication) for using the resource for the uplink data transmission of the URLLC terminal. In this regard, it is necessary to define a specific operation scheme of the terminal.

In the present specification, for convenience of description, the term of an uplink cancellation indication is described using the term, but the present specification is not limited to a specific specific term for the indication. The terms of the uplink cancellation indication described above are UL preemption indication, discontinuous UL transmission indication or suspending UL transmission indication. Or other terminology, the invention being not limited by the name.

Example 1-1. Uplink cancellation instruction ( Uplink Set monitoring information for cancellation indication

As a method for transmitting uplink cancellation indication information, a UE-specific DCI format for an uplink cancellation indication may be defined. In this case, for each UE, each UE through UE-specific PRESET or UE-specific PDCCH transmitted through UE-specific CORESET or UE-specific search space. Can be defined to send.

As another method for transmitting uplink cancellation indication information, a UE-group common DCI format for uplink cancellation indication may be defined. In this case, a UE-group transmitted through a UE-group common CORESET or a UE-group common search space configured for a UE-group. It may be defined to transmit for each UE through a common PDCCH (UE-group common PDCCH).

As such, when uplink cancellation indication information for any UE is defined to be transmitted through UE-specific PDCCH or UE-group common PDCCH, the base station / The network is uplinked through UE-specific higher layer signaling or cell-specific / UE-group common higher layer signaling for any UE. It can be defined to set up monitoring for uplink cancellation indication. However, the monitoring setting for the uplink cancellation indication may be set independently of whether the monitoring setting for the DL preemption indication is set.

Alternatively, according to another example, the aforementioned uplink cancellation indication may be indicated based on a specific sequence in addition to the method transmitted through the PDCCH in the form of UEI-specific or group-common. have. For example, the specific sequence may be preset or set based on various specific factors such as cell ID, terminal ID, or bandwidth.

In more detail, the monitoring configuration information for the uplink cancellation indication includes control resource set (CORESET), search space configuration information, and RNTI for monitoring the corresponding uplink cancellation indication information. (Radio Network Temporary Identifier) may include setting information or monitoring period setting information.

Example 1-2. Uplink cancellation instruction ( Uplink operation of UE when receiving information

Example 1-2-1. Remainder PUSCH Remaining PUSCH How to suspend transmission

The UE that has received the uplink cancellation indication information described above does not perform the PUSCH transmission in the remaining OFDM symbol (s) among the resources allocated for the PUSCH being transmitted, that is, the PUSCH. Can be defined to stop the transfer.

Specifically, as shown in FIG. 10, the terminal that receives the uplink cancellation indication includes a timing corresponding to a predetermined delay time from the time when the corresponding uplink cancellation indication information is transmitted. It can be defined to stop all PUSCH transmissions after K, which is a gap. Here, the time point at which the uplink cancellation indication information is transmitted is, for example, the last symbol in which the uplink cancellation indication information is transmitted or the uplink corresponding to the last symbol in which the uplink cancellation indication information is transmitted. It can mean a symbol.

In this case, the K value may be defined to be transmitted by the base station / network to be transmitted to the terminal through explicit signaling. For example, the K value may be set by a base station / network to allow UE-specific higher layer signaling or cell-specific / UE-group common higher layer. layer signaling) to the terminal. Alternatively, the K value is included in corresponding uplink cancellation indication information, for example, by the base station / network, and is dynamically set and transmitted through physical layer control signaling. Can be.

As another method of defining the K value, the K value is set implicitly by the capability of the UE or based on the K-value, and is set in the base station / network based on this, and thus explicit signaling is performed as described above. ) To be transmitted to the terminal.

As another way of defining the K value, the K value may be determined implicitly. For example, the K value may be defined to be determined as a function of numerology / SCS value of downlink or uplink. Alternatively, the K value may be defined as a function of the monitoring period value of the cancellation indication.

According to an example, referring to FIG. 10, a case in which PUSCH resource allocation is performed within a slot boundary of a slot is illustrated. That is, a case where a PUSCH resource allocation based on a slot or a mini slot (non-slot) is performed. The UE may perform PUSCH transmission through a slot allocated to PUSCH transmission. When the uplink cancellation instruction is received, the UE may perform an operation of stopping PUSCH transmission in a remaining symbol within a slot boundary of the corresponding slot after a symbol corresponding to a K value, which is a delay time. .

Alternatively, according to another example, referring to FIG. 11, a case where a PUSCH resource allocation based on a plurality of aggregated slots is performed is illustrated. In this case, the terminal may perform suspending only for the remaining PUSCH transmission in the slot boundary of the slot #n in which an uplink cancellation indication is received. Thereafter, the UE may normally perform PUSCH transmission through the remaining allocated slots (after # n + 1).

Or, according to another example, referring to FIG. 12, when a plurality of aggregated slot-based PUSCH resource allocations are made, the terminal may receive a slot (#n) where an uplink cancellation indication is received. ) And all remaining PUSCH transmissions for subsequent aggregated slots (after # n + 1).

Example 1-2-2. Remainder PUSCH Remaining PUSCH in some time duration of transmission PUSCH Suspending only transmission

Upon receiving the uplink cancellation indication information described above, as shown in FIG. 13, the UE corresponds to an OFDM symbol corresponding to some time duration with respect to the PUSCH transmission being transmitted. It can be defined to stop only PUSCH transmission.

In more detail, as shown in FIG. 13, a UE that receives an uplink cancellation indication transmits a PUSCH after K, which is a predetermined timing gap, from a time point of transmitting uplink cancellation indication information. The PUSCH transmission corresponding to M, which is a duration of transmission, may be defined to be suspended and then resumed after the PUSCH transmission. Here, the time point at which the uplink cancellation indication information is transmitted is, for example, the last symbol in which the uplink cancellation indication information is transmitted or the uplink corresponding to the last symbol in which the uplink cancellation indication information is transmitted. It can mean a symbol.

In this case, the method of determining the corresponding K value may be defined to be transmitted by the base station / network as described above and transmitted to the terminal through explicit signaling. For example, the K value may be set by a base station / network to allow UE-specific higher layer signaling or cell-specific / UE-group common higher layer. layer signaling) to the terminal. Alternatively, the K value is included in corresponding uplink cancellation indication information, for example, by the base station / network, and is dynamically set and transmitted through physical layer control signaling. Can be.

As another way of defining the K value, the K value may be determined implicitly. For example, it may be defined to be determined as a function of the numerology / SCS value of the DL or UL, or to be determined as a function of the monitoring period value of the cancellation indication.

In addition, the method of determining the M value, which is the suspension duration, may be defined by the base station / network and transmitted to the terminal through explicit signaling, similarly to the method of determining the K value. Can be. For example, the M value may be set by the base station / network to allow UE-specific higher layer signaling or cell-specific / UE-group common higher layer. layer signaling) to the terminal. Alternatively, the M value may be included in corresponding uplink cancellation indication information, for example, by the base station / network, and may be dynamically set and transmitted through physical layer control signaling. Can be.

Alternatively, the M value may be defined to be implicitly set by the capability of the terminal or set at the base station / network based on the capability of the terminal and transmitted to the terminal through explicit signaling as described above. .

As another way of defining the corresponding M value, the corresponding M value may be determined implicitly. For example, it may be defined to be determined as a function of the number of downlink or uplink numerology / SCS values, or to be determined as a function of the monitoring period value of the cancellation indication.

In addition, if a PUSCH transmission is resumed after a certain duration has elapsed, it may be defined to signal it at the base station / network explicitly.

In addition, an OFDM symbol or a slot may be applied as a unit for defining the K value or the M value, and for PUSCH transmission as a numerology or SCS value for defining a symbol or slot boundary. It may be defined to be determined by the SCS applied or determined by the SCS of the downlink (for example, PDCCH for transmitting an uplink cancellation indication).

According to an example, transmission of uplink cancellation indication information during PUSCH transmission of a UE may be transmitted through downlink. Alternatively, according to an example, the transmission of uplink cancellation indication information may be performed through a neighbor cell of a cell in which the UE is performing PUSCH transmission. To this end, a multicarrier or carrier aggregation scheme may be used. However, this is only an example, and the present invention is not limited thereto, and the UE is not limited to the specific method as long as the UE can receive uplink cancellation indication information while performing PUSCH transmission.

Accordingly, when an uplink cancellation instruction request is made to another terminal requiring a low delay rate during transmission of an uplink data channel of the terminal, transmission of an uplink channel to another terminal may be prioritized. The delay rate can be met. Accordingly, the uplink channel of the URLLC terminal may be transmitted during the uplink data channel transmission of the eMBB terminal, thereby enabling efficient multiplexing of the URLLC service and the eMBB service.

실시예 2Example 2

The present specification also proposes a method and apparatus for controlling uplink data channel transmission power for efficient multiplexing for Ultra Reliable and Low Latency Communications (URLLC) and Enhanced Mobile BroadBand (eMBB) services in a next generation / 5G wireless access network.

The present specification is a method for efficiently supporting uplink data transmission between terminals having different latency requirements in a next generation / 5G wireless access network, and a method and apparatus for uplink transmission multiplexing through transmission power control. Suggest to

As described above in Embodiment 1, as a service scenario provided by NR and LTE / LTE-A system, URLLC requiring low latency / high reliability along with data support related to eMBB service for maximizing data transmission speed The importance of efficient support of service-related data is increasing.

In particular, in order to transmit the uplink data for URLLC in order to satisfy the requirement for the delay time, a part of the uplink data transmission resources of another terminal that is already scheduled may be preempted and transmitted similarly to the downlink case. For example, during transmission of uplink data by the eMBB terminal, when transmission of uplink data of a URLLC terminal sensitive to a delay rate request is necessary, the URLLC terminal may preemptively transmit a portion of the uplink data transmission resource of the eMBB terminal. have.

Embodiment 1 stops transmitting an uplink data channel (PUSCH) of a terminal currently transmitting uplink data and provides an uplink cancellation indication for using the corresponding resource for uplink data transmission of a URLLC terminal. Support and specific terminal operation plan were defined.

However, the preemption-based PUSCH multiplexing may be performed through proper power control between the eMBB PUSCH transmission and the URLLC PUSCH transmission in which the collision occurs. In more detail, the UE in which URLLC PUSCH transmission is allocated to some time period or frequency interval resources allocated for URLLC PUSCH transmission among the eMBB PUSCH transmission intervals is instructed to allocate sufficient PUSCH transmission power, and the PUSCH for UEs in which eMBB PUSCH transmission is performed. By instructing the transmission power to be lowered, the base station can ensure the reception performance for the urgent URLLC PUSCH.

The second embodiment adjusts the PUSCH transmission power of a specific terminal (eg eMBB terminal) that is currently being transmitted as described above, and thus performs performance on PUSCH transmission of another terminal (eg URLLC terminal) using a part of the same radio resource by overlapping. We propose a dynamic power control indication method and apparatus to ensure the reliability.

In this specification, the indication control information for dynamically changing a PUSCH transmission power of a UE during PUSCH transmission is referred to as an uplink discontinuous TPC command or uplink discontinuous TPC command information. However, this is only a name for convenience of description and the present invention is not limited by the name. The terms of the uplink discontinuous TPC command described above are an uplink cancellation indication, an uplink preemption indication, and an uplink suspending TPC command. command), an uplink interrupt TPC command, or another terminology, and the invention is not limited by the name.

Embodiment 2 transmits and receives an uplink data channel according to a first transmission power control between a terminal and a base station, transmits and receives an uplink discontinuous TPC command, and transmits an uplink data channel based on an uplink discontinuous TPC command. Provides a method and a terminal for adjusting the second transmission power control, and a base station corresponding thereto.

Hereinafter, after setting the monitoring information for the uplink discontinuous TPC command (Uplink discontinuous TPC command) and the configuration of the discontinuous TPC command information and the terminal operation according to the second embodiment, the specific operations of the terminal and the base station are divided and described.

Example 2-1. Uplink discontinuity TPC Command ( Uplink discontinuous TPC command monitoring information)

As a method for transmitting uplink discontinuous TPC command information, a UE-specific downlink DCI format for discontinuous TPC commands may be defined. The base station transmits for each terminal through a UE-specific PDCCH (UE-specific PDCCH) transmitted through a UE-specific corset or a UE-specific search space for each terminal. Can be.

As another method for transmitting discontinuous TPC command information, a downlink DCI format (DCI format) common to UE-groups for discontinuous TPC commands may be defined. The base station is a UE-group transmitted through a UE-group common CORESET or UE-group common search space configured for any UE-group. Each UE may be transmitted through a common PDCCH (UE-group common PDCCH).

As such, when the discontinuous TPC command information for any UE is defined to be transmitted through a UE-specific PDCCH or a UE-group common PDCCH, the base station / network may be assigned to any UE. Configure monitoring for discontinuous TPC commands through UE-specific higher layer signaling or cell-specific / UE-group common higher layer signaling Can be defined to However, the monitoring setting for the corresponding discontinuous TPC command may be set independently of whether the monitoring setting for the downlink preemption instruction is set.

In more detail, the monitoring setting information for the discontinuous TPC command may include CORESET and search space setting information, RNTI setting information, and monitoring cycle setting information for monitoring the discontinuous TPC command information.

Example 2-2. Discontinuous TPC Command Information Configuration and Terminal Operation

Example 2-2-1. Rebalance power for all remaining PUSCH transmissions

The terminal that has received the aforementioned discontinuous TPC command information has a discontinuous TPC for PUSCH transmission in the remaining OFDM symbol (s) after receiving the discontinuous TPC command among the resources allocated for the PUSCH being transmitted. The remaining PUSCH transmission may be defined based on the read power adjusted according to the command indication information.

In more detail, the terminal receiving the discontinuous TPC command discontinuous TPC command re-adjusts the transmit power according to the discontinuous TPC command indication information for the remaining PUSCH transmission after the constant timing gap K from the time point at which the discontinuous TPC command information is made and adjusts the corresponding PUSCH. Can be defined to send. Here, the time point at which the discontinuous TPC command information is transmitted may mean, for example, an uplink symbol corresponding to the last symbol in which discontinuous TPC command information is transmitted or the last symbol in which discontinuous TPC command information is transmitted.

In other words, the terminal receiving the discontinuous TPC command discontinuous TPC command determines the PUSCH transmission power according to the first transmission power control before K ', which is a certain timing gap, from the time point at which the discontinuous TPC command information is transmitted, With respect to the discontinuous TPC command indication information, the transmission power may be readjusted according to the second transmission power control. For example, as described below, the first transmit power control may be a general PUSCH transmit power control method, and the second transmit power control may transmit transmit power according to the second transmit power control according to the discontinuous TPC command indication information. It can mean recalibration.

As described below, the first transmission power control may apply the above-described Equation 1 or a newly defined Equation, and may apply a parameter or a parameter set defined in Equation 1 in these equations. In addition, the second transmission power control may mean applying the same equation as the first transmission power control, but applying a different parameter or parameter set from the first transmission power control.

The parameter or parameter set used in the first and second transmit power controls is the maximum transmit power value P _CMAX _{, f, c} (i) set for the corresponding terminal in Equation 1, the component P _{O_NOMINAL_} _PUSCH provided by the upper layer parameter _, _{f, c} (j), component P _{O_} _UE _{_} _PUSCH _, _{f, c} (j), component P _{O_NOMINAL_PUSCH,} _{f, c} (j) and component P _{O_} _UE _{_} _PUSCH _, _{f, c} (j) Parameters P _{o_PUSCH, f, c} (j), which are offset values computed by a particular higher layer parameter,

According to the TPC command value transmitted by the downlink control information

, TPC comment included in downlink control information

And a PUSCH power control adjustment state with index l calculated by a particular higher layer parameter.

May be one or more than two.

Meanwhile, equations applied to the first transmission power control and the second transmission power control may be different from each other. As described later, the first transmission power control may apply Equation 1 described above. The second transmit power control may apply an equation different from Equation 1 below.

In this case, the corresponding K 'value may be defined to be transmitted by the base station / network to be transmitted to the terminal through explicit signaling. For example, the terminal may be configured by a base station / network and configured through UE-specific or cell-specific / UE-group common higher layer signaling. Can be sent to. The K 'value may be dynamically set and transmitted by the base station / network through physical layer control signaling. For example, the K 'value may be included in corresponding discontinuous TPC command information dynamically transmitted through physical layer control signaling.

As another method of defining the corresponding K 'value, the K' value is implicitly set by the capability of the terminal or is set in the base station / network based on the capability so that it is transmitted to the terminal through explicit signaling as described above. Can be defined

As another way of defining the K 'value, the K' value may be determined implicitly. For example, it may be defined to be determined as a function of downlink or uplink numerology / subcarrier number / SCS value. It may also be defined such that the value is determined as a function of the monitoring period value of the aforementioned discontinuous TPC command.

In addition, the discontinuous TPC command indication information may be defined to include power offset indication information for readjustment of transmission power of the corresponding PUSCH. Upon receiving the discontinuous TPC command information, the terminal may readjust the transmission power value of the currently transmitted PUSCH according to the corresponding power offset indication information to perform the remaining PUSCH transmission.

The UE transmits the PUSCH to the carrier f of the serving cell c by using a parameter set configuration with index j and a PUSCH power control adjustment state with index l. When the PUSCH transmission period i (PUSCH transmission period i), the transmission power (P _PUSCH _{, f, c} (i, j, qd, l)) for the PUSCH transmission of any terminal by the following equation (1) It was decided.

In Equation 1, the variables summarized below are specifically defined in 7.Uplink Power control in TS38.213.

P _CMAX _{, f, c} (i) is the configured UE transmit power for carrier f of serving cell for the carrier f of the serving cell c in the PUSCH transmission period i (PUSCH transmission period i) c in PUSCH transmission period i).

P _{o_} _PUSCH _{, f, c} (j) is a parameter composed of the sum of components P _{O_NOMINAL_} _PUSCH _{, f, c} (j) and components P _{O_UE_PUSCH, f, c} (j) provided by higher layer parameters.

u is the carrier f of the serving cell c and the subcarrier spacing for the PUSCH.

The bandwidth of the PUSCH resource assignment expressed in number of resource blocks for PUSCH transmission is expressed by the number of allocated resource blocks for PUSCH transmission.

Is provided by certain higher layer parameters,

Is a downlink path attenuation value in dB unit calculated by the corresponding terminal using the reference signal resource q _d ,

Is an offset value calculated by a specific upper layer parameter,

Is a value indicating a PUSCH power control adjustment state with index l calculated by the TPC comment included in the downlink control information and a specific upper layer parameter.

Any UE derives a PUSCH transmission power value by Equation (1) above when transmitting PUSCH of one or more slot (s) or mini-slot based (i.e. non-slot based).

However, when the equation for the new PUSCH transmission power is defined in NR, the PUSCH transmission power value of the corresponding UE may be determined accordingly.

As such, when an arbitrary terminal whose PUSCH transmission power is determined by the equation for PUSCH transmission power as the first transmission power control receives a discontinuous TPC command, the second transmission is performed according to the power offset indication information indicated through the discontinuous TPC command. As the power control, the transmission power may be readjusted by the power offset value indicated by the Equation 1 for the transmission power for the PUSCH transmission of an arbitrary terminal to perform the PUSCH transmission corresponding to the remaining SCHs.

However, the above-described power offset indication information indicated by the discontinuous TPC command may be configured with one bit or more.

In this case, as a method of defining the above-described power offset value according to a specific setting value of the power offset indication information of the discontinuous TPC command, a fixed power offset value according to the setting value of the discontinuous TPC command may be defined in a table form. .

Alternatively, the power offset value according to the setting value of the discontinuous TPC command may be set by the base station. If the power offset value according to the setting value of the discontinuous TPC command is set by the base station, the terminal-specific higher layer signaling by setting the power offset value corresponding to each setting value of the power offset indication information of the corresponding TPC command for each terminal. It can be transmitted through or set by all terminals or terminal-group in the cell, and can be defined to transmit through cell-specific / terminal-group common higher layer signaling.

In the second embodiment, the PUSCH transmission power control according to the discontinuous TPC command includes not only the power readjustment for the remaining PUSCHs according to the discontinuous TPC command but also the corresponding PUSCH transmission power to be zero.

For example, the information region indicating that the remaining PUSCH transmission itself is stopped, as well as an indication of power rebalancing for the remaining PUSCH through the above-described power offset indication information through the discontinuous TPC command, that is, the remaining PUSCH transmission power It can be defined to include an information area indicating to be zero.

In more detail, it may be defined to include 1-bit flag information for indicating whether the corresponding discontinuous TPC command is for retransmission of the remaining PUSCH or to stop transmission for the remaining PUSCH. The flag information of this bit may be defined to determine whether the UE retransmits the transmission power for the remaining PUSCH or stops the remaining PUSCH transmission according to the corresponding discontinuous TPC command.

Alternatively, when the power offset indication information in the above-described discontinuous TPC command is set to a specific value (eg, when the corresponding setting value is '0'), the terminal receiving the discontinuous TPC command may define to stop the remaining PUSCH transmission itself. have.

Example 2-2-2. Remainder PUSCH Part of the transfer In time duration A method of retransmitting transmission power only for PUSCH transmission.

Upon receiving the discontinuous TPC command information, the UE may define to retransmit the PUSCH transmission power only for some time period for the PUSCH transmission being transmitted.

In detail, as illustrated in FIG. 15, the terminal that receives the discontinuous TPC command corresponds to M ′, which is an adjustment time duration of the PUSCH transmission after the constant timing gap K ′ from the time point at which the discontinuous TPC command information is transmitted. For the PUSCH transmission, after adjusting the transmission power value, it may be defined to resume the PUSCH transmission based on the original transmission power value after that.

In other words, as shown in FIG. 15, the terminal that receives the discontinuous TPC command determines the PUSCH transmission power according to the first transmission power control before K ′, which is a predetermined timing gap, from the time point at which the discontinuous TPC command information is transmitted. In response to the discontinuous TPC command indication information, the transmission power may be readjusted according to the corresponding discontinuous TPC command indication information for the remaining PUSCH transmission after the timing gap K 'and M' which is a reconditioning time duration. The UE may determine the PUSCH transmission power according to the first transmission power control after the timing gap K ′ and the reconditioning time duration M ′ from the time point at which the discontinuous TPC command information is transmitted.

The first transmission power control and the second transmission power control may be the same as described in the embodiment 2-2-1.

As shown in FIG. 15, the UE has a third transmission power control and second transmission power control different from the timing gap K 'and the first transmission power control after the readjustment time duration M' from the time point at which the discontinuous TPC command information is transmitted. PUSCH transmission power may be determined according to transmission power control. The third transmission power control may be to apply a different parameter or parameter set from the first and second power control, or to apply another equation.

As described above in Embodiment 2-2-1, the time point at which the discontinuous TPC command information is transmitted may correspond to, for example, the last symbol in which discontinuous TPC command information is transmitted or the last symbol in which discontinuous TPC command information is transmitted. It may mean an uplink symbol.

In this case, a method of determining the corresponding K 'value, a method of determining a power offset value for readjusting transmission power through the discontinuous TPC command, and a method of indicating whether to stop the corresponding PUSCH transmission or adjust the transmission power are performed. It may be the same as described above in Example 2-2-1.

In addition, the method of determining the M 'value, which is a time period to which the above-described transmission power readjustment is applied, may also be defined to be set by the base station / network and transmitted to the terminal through explicit signaling, similarly to the method of determining the K' value described above. have. For example, UE-specific higher layer signaling or cell-specific / UE-group common higher layer signaling configured by a base station / network It may be transmitted to the terminal through. It may also be dynamically set and transmitted through physical layer control signaling. For example, the M 'value may be included in corresponding discontinuous TPC command information dynamically transmitted through physical layer control signaling.

Alternatively, the corresponding M 'value may be set to be implicit by the capability of the terminal or set in the base station / network based on the capability and transmitted to the terminal through explicit signaling as described above. have.

As another way of defining the corresponding M 'value, the corresponding M' value may be determined implicitly. For example, it may be defined to be determined as a function of the number of downlink or uplink numerology / SCS values, or to be determined as a function of the monitoring period value of the cancellation indication.

Additionally, the transmission power readjustment based on the discontinuous TPC command information according to the above-described embodiments 2-2-1 and 2-2-1 indicates that the application of the discontinuous TPC command is being transmitted or is instructed when the discontinuous TPC command is received. It is defined to be temporarily applied only to the PUSCH transmission, and a corresponding power readjustment value may not be accumulated and applied to other subsequent PUSCH transmissions. That is, the subsequent PUSCH may be defined to follow the existing PUSCH transmission power control procedure regardless of whether a corresponding discontinuous TPC command is received and a power readjustment value according to the discontinuous TPC command.

Referring to FIG. 17, in a method of controlling transmission power of an uplink data channel by a terminal according to Embodiment 2, transmitting an uplink data channel according to a first transmission power control (S1710), an uplink discontinuous TPC command Receiving (S1720) and adjusting the transmit power of the uplink data channel being transmitted to the second transmit power control based on the uplink discontinuous TPC command (S1730).

In step S1720 of receiving an uplink discontinuous TPC command, the uplink discontinuous TPC command may be monitored based on the monitoring configuration information for the uplink discontinuous TPC command.

As described in Embodiment 2, the monitoring configuration information includes control resource set (CORESET) and search space configuration information for monitoring uplink discontinuous TPC commands, and Radio Network Temporary Identifier (RNTI). Configuration information and monitoring cycle setting information may be included. Specific contents thereof are the same as those described in detail in Example 2-1.

The uplink discontinuous TPC command may be indicated through a UE-specific DCI or a UE-group common DCI.

Adjusting the transmission power of the uplink data channel to the second transmission power control (S1730), after the predetermined delay time has elapsed at the time when the uplink discontinuous TPC command is received, removes the transmission power of the uplink data channel. 2 can be adjusted by transmission power control. Details thereof are the same as those described in detail in Example 2-2-1 described above with reference to FIG. 14.

Adjusting the transmission power of the uplink data channel to the second transmission power control (S1730), the transmission of the uplink data in the slot in which the uplink discontinuous TPC command is received, or uplink for the uplink data channel Based on the data channel resource allocation information, the transmission power of the uplink data channel may be adjusted by the second transmission power control for all of the plurality of allocated slots.

The uplink discontinuous TPC command may further include information on a readjustment period for adjusting the transmit power of the uplink data channel to the second transmit power control. In step S1730, the transmission power of the uplink data channel is adjusted to the second transmission power control, and the transmission power of the uplink data channel is adjusted to the second transmission power control during the readjustment period, and after the readjustment period has elapsed, the uplink The transmit power of the data channel may be adjusted by the first transmit power control. Details thereof are the same as those described in detail in Example 2-2-2 described above with reference to FIGS. 15 and 16.

Referring to FIG. 18, in the method of controlling an uplink data channel of a terminal, the method includes configuring monitoring setting information for an uplink discontinuous TPC command (S1810) and providing the monitoring setting information to a terminal transmitting an uplink data channel. And a step S1830 of transmitting an uplink discontinuous TPC command based on the step S1820 and the monitoring configuration information.

The monitoring configuration information may include control resource set (CORESET) and search space configuration information, Radio Network Temporary Identifier (RNTI) configuration information, and monitoring cycle configuration information for monitoring uplink discontinuous TPC commands. It may include. Specific contents thereof are the same as those described in detail in Example 2-1.

As described in detail in Embodiment 2-2-1 with reference to FIG. 14, the UE transmits a transmission power of an uplink data channel after a predetermined delay time elapses when an uplink discontinuous TPC command is received. Can be readjusted.

The terminal readjusts the transmission power of the uplink data channel in the slot in which the uplink discontinuous TPC command is received or for all of the plurality of slots allocated based on the uplink data channel resource allocation information for the uplink data channel. The transmission power of the uplink data channel may be readjusted.

As described in detail in Embodiment 2-2-2 described above with reference to FIGS. 15 and 16, information about a readjustment period for adjusting the transmission power of the uplink data channel to the second transmission power control may be further included. Can be. The terminal may adjust the transmit power of the uplink data channel to the second transmit power control during the readjustment period, and adjust the transmit power of the uplink data channel to the first transmit power control after the readjustment period elapses. .

19 is a diagram showing the configuration of a base station according to the third embodiment.

Referring to FIG. 19, a base station 1900 according to another embodiment includes a controller 1910, a transmitter 1920, and a receiver 1930.

The controller 1910 controls the overall operation of the base station 1900 according to the method for controlling the transmission power of the uplink data channel in the next-generation wireless network required to perform the above-described present invention.

The transmitter 1920 and the receiver 1930 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.

The base station 1900 for controlling uplink data transmission of the terminal transmits the monitoring configuration information to the control unit 1910 constituting the monitoring configuration information for the uplink discontinuous TPC command and the terminal transmitting the uplink data channel, and monitoring It may include a transmitter 1920 for transmitting the uplink discontinuous TPC command based on the configuration information.

The terminal may readjust the transmission power of the uplink data channel after a predetermined delay time elapses when the uplink discontinuous TPC command is received. Details thereof are the same as those described in detail in Example 2-2-1 described above with reference to FIG. 14.

The uplink discontinuous TPC command may further include information on a readjustment period for adjusting the transmit power of the uplink data channel to the second transmit power control.

The terminal may adjust the transmit power of the uplink data channel to the second transmit power control during the readjustment period, and adjust the transmit power of the uplink data channel to the first transmit power control after the readjustment period elapses. Details thereof are the same as those described in detail in Example 2-2-2 described above with reference to FIGS. 15 and 16.

Referring to FIG. 20, the user terminal 2000 according to another embodiment includes a receiver 2010, a controller 2020, and a transmitter 2030.

The receiver 2010 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 2020 controls the overall operation of the user terminal 2000 according to the method for controlling the transmission power of the uplink data channel in the next-generation wireless network required to perform the above-described present invention.

The transmitter 2030 transmits uplink control information, data, and a message to a base station through a corresponding channel.

The terminal 2000 for transmitting uplink data includes a transmitter 2030 for transmitting an uplink data channel, a receiver 2010 for receiving an uplink discontinuous TPC command, and an uplink discontinuous TPC command according to a first transmission power control. And a control unit 2020 that adjusts the transmission power of the uplink data channel being transmitted based on the second transmission power control.

The receiver 2010 may monitor the uplink discontinuous TPC command based on the monitoring configuration information for the uplink discontinuous TPC command.

The controller 2020 may adjust the transmission power of the uplink data channel to the second transmission power control after a predetermined delay time elapses when the uplink discontinuous TPC command is received. Details thereof are the same as those described in detail in Example 2-2-1 described above with reference to FIG. 14.

The control unit 2020 stops the transmission of the uplink data in the slot in which the uplink discontinuous TPC command is received, or all of the plurality of slots allocated based on the uplink data channel resource allocation information for the uplink data channel. The transmit power of the uplink data channel may be adjusted by the second transmit power control.

The uplink discontinuous TPC command may further include information on a readjustment period for adjusting the transmit power of the uplink data channel to the second transmit power control. The controller 2020 may adjust the transmit power of the uplink data channel to the second transmit power control during the readjustment period, and adjust the transmit power of the uplink data channel to the first transmit power control after the readjustment period elapses. Details thereof are the same as those described in detail in Example 2-2-2 described above with reference to FIGS. 15 and 16.

실시예 3Example 3

The present specification proposes an uplink power control method and apparatus for supporting Ultra Reliable and Low Latency Communications (URLLC) and Enhanced Mobile BroadBand (eMBB) services in a next generation / 5G wireless access network.

The present specification proposes an uplink power control method for satisfying different service requirements in a wireless mobile communication system such as LTE / LTE-A and NR. In particular, a method and apparatus for supporting a plurality of uplink power control procedures according to a service request in one terminal are proposed.

As a service scenario provided by NR and LTE / LTE-A system, it supports eMBB service related data for maximizing data transmission rate and efficient support for URLLC service related data requiring low latency / high reliability. Is increasing in importance.

In particular, in case of data related to URLLC, it is necessary to improve reliability of data transmission and reception compared to eMBB along with a technique for minimizing delay time. To this end, it is necessary to improve reliability for PDSCH / PUSCH for transmitting and receiving uplink / downlink data.

The present specification is a method for satisfying such different reliability requirements, and a method and apparatus for defining and applying different power control procedures according to a corresponding reliability request when transmitting uplink data in one terminal Suggest for

According to a power control method for PUSCH transmission, which is an uplink data channel of a terminal defined in LTE / LTE-A and NR systems, dynamic power based on a corresponding upper layer power control parameter or a TPC command according to a single transmission power control equation. The PUSCH transmit power is determined by applying the power control parameter.

As described below, whose value is determined by the upper layer parameter, p0- pusch -alpha-set according to a single transmission power control equation

The transmit power for the PUSCH is determined by the value and the TPC command value transmitted through the PDCCH.

The present specification proposes a method and apparatus for applying different power control procedures according to a reliability request for a corresponding PUSCH transmission when a PUSCH is transmitted by any one terminal.

Referring to FIG. 21, according to the third embodiment, a method and a terminal for transmitting and receiving an uplink data channel to which different power control is applied for each reliability request and for each reliability request are applied to an uplink data channel between the terminal and the base station. It provides a base station corresponding thereto.

In the following, embodiments after explaining the control procedure of the multi-reliability requirements based on Example 3, it will be described by dividing the specific operation of the mobile station and the base station.

Example 3-1. Reliability Requirements Based Multiple Transmit Power Control Procedures

Example 3-1-1. Application of Multiple Transmission Power Control Parameter Set Based on Reliability Requirements

Define a plurality of power control parameter sets for transmission power control for the PUSCH for one terminal, and different parameters according to the reliability request or target block error rate (BLER) for the PUSCH transmission for any PUSCH transmission Values may be defined to apply to the corresponding transmission power control equation. The foregoing reliability requirement or target BLER is referred to as a target BLER.

As described above in Embodiment 2-2-1, the UE sets a parameter set configuration with index j and a PUSCH power control adjustment state with index l. When transmitting the PUSCH to the carrier f of the serving cell c by using, the transmission power (P _PUSCH _{, f, c} (i, j, qd,) for the PUSCH transmission of any terminal in the PUSCH transmission period i (PUSCH transmission period i) l)) was determined by the following equation (1).

Also, a set of upper layer parameters and a set of TPC command values indicated by the PDCCH for applying to each parameter of Equation (1) are defined. However, the power control parameters are defined as a single value or a set of values based on a single target BLER for PUSCH transmission, and a single transmit power equation for PUSCH transmission is applied through the single value or set. .

Embodiment 3 is a method of uplink power control to satisfy a plurality of target BLERs for PUSCH transmission, and defines a plurality of different power control parameters or parameter sets for each target BLER for different PUSCHs in one UE. We propose a scheme to apply this independently for each PUSCH transmission.

A plurality of power control parameters or parameter sets that are different for each target BLER for a different PUSCH in one UE are determined by the maximum transmit power values P _CMAX _{, f, c} (i) and higher layer parameters set for the corresponding UE in Equation 1. Component P _{O_NOMINAL_PUSCH,} _{f, c} (j), Component P _{O_} _UE _{_} _PUSCH _, _{f, c} (j), Component P _{O_NOMINAL_} _PUSCH _, _{f, c} (j) and Component P _{O_} _UE _{_} _PUSCH _, _{f, c} P _{o_} _PUSCH _{, f, c} (j), which is a parameter composed of the sum of (j),

, TPC comment included in downlink control information

May be one or more than two.

For example, 10 ¹ and 10 as the target BLER for the PUSCH transmission as required by the NR ^- ⁵ If the definition, the target BLER of 10 ^-1 to apply to the above-described equation (1) for one of the terminal P _CMAX _{, a} value for requesting PUSCH transmission and P _CMAX _, _b value for PUSCH transmission requiring a target BLER of 10 ⁻⁵ may be defined, respectively. The values of P _CMAX _{, a} and P _CMAX _, _{b are} values corresponding to P _{CMAX, f, and c} (i) in the above expression (1).

Also as described above, like the equation (1) the _UE _{_} _{O_} P _{_PUSCH,} _{f, c} (j) an upper layer for deriving a value defining the set of p0- pusch -alpha-set of parameters, a target BLER ^10-1 p0- for PUSCH transmission requiring pusch -alpha-set-a and ^{10 -5 p0-pusch-alpha-} set-b for the PUSCH transmission requiring the target BLER of that it may be defined, respectively.

Similarly, depending on the TPC command value sent by the PDCCH

In defining a table constituting a value, TPC_command_table_a for PUSCH transmission requiring a target BLER of 10 ^-1 and TPC_command_table_b for PUSCH transmission requiring a target BLER of 10 ^-5 and additionally TPC- PUSCH-RNTI-a and TPC-PUSCH-RNTI-b may be defined, respectively.

Based on this, in calculating a transmission power value for any PUSCH transmission in any terminal, the above equation (1) is applied in the same manner, but the respective parameter values constituting the above equation (1) are applied. In this case, it is defined to determine whether to apply different parameter sets according to the target BLER of the corresponding PUSCH, that is, the target BLER based set a of 10 ⁻¹ or the target bLER based set b of 10 ⁻⁵ . can do.

Accordingly, each UE calculates an arbitrary PUSCH transmission power according to a single transmission power control equation as shown in Equation (1) above, but applies different parameter sets according to the target BLER of the corresponding PUSCH transmission to actually apply the corresponding PUSCH transmission power. It can be defined to derive the transmission power of the PUSCH. That is, one terminal may define and apply an independent transmission power control procedure for each target BLER.

Additionally, this embodiment may be applied regardless of the form of a specific PUSCH transmission power control equation. In addition, the present embodiment applies a separate parameter set for each target BLER to only a part of the above parameters for applying to a single PUSCH transmission power control equation, and based on this, a separate power control procedure for each target BLER is performed. In this case, the present embodiment can also be applied.

In addition, regardless of the specific target BLER value defined for PUSCH transmission, as described above, separate power control parameter sets are defined for different target BLERs, and applied separately according to the target BLER required for each PUSCH transmission. This embodiment can be applied to all cases.

In addition, the parameter set (s) according to the target BLER to be applied to the power control equation for PUSCH transmission in an arbitrary terminal is set in the base station and transmitted to the corresponding terminal through higher layer signaling, or explicitly through physical layer control signaling. Can be indicated. Further, the parameter set (s) according to the target BLER to be applied to the power control equation for PUSCH transmission in an arbitrary terminal is implied as a function of PUSCH allocation type (type A or type B), time-domain symbol allocation information, and the like. Can be indicated.

Physical layer control signaling may mean, for example, a DCI such as an uplink grant or a TPC command transmitted through a PDCCH. The time-domain symbol assignment information may include, for example, the number of assigned symbols or information of slot based assignment vs. non-slot based assignment.

Alternatively, the target BLER value required for PUSCH transmission of the corresponding UE is set in the base station and transmitted through higher layer signaling, or implicitly indicated through the physical layer control signaling or implied as described above, thereby corresponding to the corresponding target BLER. It can be defined to apply a power control parameter set.

The physical layer control signaling may be an uplink grant transmitted through the PDCCH or may be a DCI such as a TPC command. As a method of implicitly indicating through physical layer control signaling, a power control parameter set to be applied may be determined according to an RNTI value scrambling to the CRC of the corresponding physical layer control signaling. For example, when MCS-C-RNTI is additionally set in addition to the C-RNTI for a certain terminal, or when a new-RNTI is defined and configured to indicate another power control parameter set, an uplink grant for the terminal. A power control parameter set for power control of a corresponding PUSCH transmission may be determined according to the RNTI value scrambled in the CRC.

Example 3-2. Application of Multiple Transmit Power Control Equation Based on Reliability Requirements

As another method for defining different power control procedures for each target BLER in one terminal, different power control equations may be defined and applied for each target BLER.

For example, the above-described power control procedure based on Equation (1) is applied for PUSCH transmission that satisfies the target BLER of 10 ^-1 and new for PUSCH transmission that satisfies the target BLER of 10 ^-5 . The power control equation (2) may be defined to apply it.

Accordingly, the corresponding equation (1) or equation (2) may be applied according to the target BLER when the PUSCH is transmitted by an arbitrary terminal. However, this embodiment can be applied regardless of the specific power control equation, that is, the form of equations (1) and (2).

That is, in every case of defining different power control equations for each target BLER and deriving PUSCH transmission power based on a power control equation separately defined according to a target BLER required by any PUSCH transmission, Included in the category.

In addition, regardless of the specific target BLER value defined for PUSCH transmission, all cases where a separate power control equation is defined for each different target BLER as described above are also included in the scope of the present embodiment.

As such, when a PUSCH transmission power control equation is separately defined for each target BLER, a method for indicating an equation to be applied for a certain PUSCH transmission in a certain terminal, the equation to be applied for the corresponding PUSCH transmission in the corresponding terminal Set by the base station and transmitted to the corresponding terminal through higher layer signaling, or explicitly indicating an equation to be applied through physical layer control signaling, or PUSCH resource allocation type (type A or type B) or time-domain symbol allocation Can be defined implicitly as a function such as information.

Alternatively, the target BLER value required for PUSCH transmission of the corresponding UE is set in the base station and transmitted through higher layer signaling, or implicitly indicated through the physical layer control signaling or implied as described above, thereby corresponding to the corresponding target BLER. It can be defined to apply the power control equation.

The physical layer control signaling may be an uplink grant transmitted through the PDCCH or may be a DCI such as a TPC command. As a method of implicitly indicating through physical layer control signaling, a power control equation to be applied may be determined according to an RNTI value scrambled to the CRC of the corresponding physical layer control signaling. For example, when MCS-C-RNTI is additionally set in addition to the C-RNTI for a certain terminal, or when a new-RNTI is newly defined and a corresponding new-RNTI is set to indicate another power control parameter set, A power control equation for power control of a corresponding PUSCH transmission may be determined according to the RNTI value scrambled in the CRC of the uplink grant for the UE.

Additionally, in the example of Embodiment 3 above, as a method of defining a new equation (2) for a target BLER of 10 ^-5 , which is a new target BLER value, a power boosting related parameter compared to the equation (1) The equation (2) may be defined in the form of adding an delta.

Equation (1) against power boosting (power boosting) transmission power to a form for adding delta (delta) of the relevant parameter, of the arbitrary terminal PUSCH transmission in PUSCH transmission interval i (PUSCH transmission period i) (P _{_PUSCH, f, c} (i, j, qd, l)) may be as shown in Equation (2) below.

Delta value in equation (2)

Except for the other values may be the same as the equation (1).

However, the corresponding delta value

Fixed single delta in defining

Is defined or a single delta value by the base station

This may be set and transmitted to the terminal through higher layer signaling. Or the corresponding delta value

Another way to define is the corresponding delta value

Defined as a table consisting of a plurality of fixed candidate (delta) values for applying, or set to a plurality of candidate delta values for configuring the table to be transmitted to each terminal through higher layer signaling. Can be.

However, when a plurality of delta values are defined, the delta value to be applied at each PUSCH transmission

May be indicated to the corresponding terminal through physical layer control signaling such as an uplink grant, or may be set through higher layer signaling and transmitted to the terminal.

In Example 3 described above, it was described that different power control is applied for each reliability request or for each target BLER. Different power controls can be applied regardless of reliability requirements or target BLER. Hereinafter, methods for controlling transmission power of an uplink data channel of a terminal and a base station applying different power control regardless of reliability request or target BLER will be described.

Referring to FIG. 22, in a method of controlling transmission power of an uplink data channel, the terminal may include applying different power control to the uplink data channel (S2210) and transmitting an uplink data channel to which different power control is applied. It includes a step (S2220).

In the step of applying different power control to the uplink data channel (S210),

Applies a transmission power control equation for a single uplink data channel, sets a plurality of power control parameters or parameter sets to apply to the transmission power control equation, and sets one of the plurality of power control parameters or parameter sets. The transmit power of the uplink data channel may be controlled based on a single transmit power control equation applying a transmit power control parameter or a parameter set. Specific contents thereof are the same as those described in detail in Example 3-1-1.

The power control parameter or parameter set may be set in the corresponding terminal through higher layer signaling.

In addition, the power control parameter or parameter set may be independently transmitted to a corresponding terminal through higher layer signaling, explicitly indicated through physical layer control signaling, or implicitly indicated.

A method in which one power control parameter or parameter set is implicitly indicated through physical layer control signaling may be indicated by an RNTI value scrambled in a CRC for physical layer control channel transmission.

Define a plurality of transmit power control equations for applying to the uplink data channel, apply power control to the uplink data channel by applying one of the plurality of transmit power control equations. can do. Specific contents thereof are the same as those described in detail in Example 3-1-2.

One of the transmit power control equations for the uplink data channel may further include a power boosting related parameter.

One transmission power control equation to be applied to uplink data channel transmission may be set through higher layer signaling or may be explicitly or implicitly indicated through physical layer control signaling.

A method in which one power control equation is implicitly indicated through physical layer control signaling may be indicated by an RNTI value scrambled in a CRC for physical layer control channel transmission.

Referring to FIG. 23, in the method of receiving an uplink data channel, the base station explicitly transmits or implicitly instructs the terminal to control information indicating different power control on the downlink data channel (S2310); And receiving an uplink data channel applying different power control to the uplink data channel (S2320). In step S2320 of receiving an uplink data channel, a transmission power control equation for a single uplink data channel is applied.

Applies a transmission power control equation for a single uplink data channel, sets a plurality of power control parameters or parameter sets to apply to the transmission power control equation, and sets one of a plurality of configured power control parameters or parameter sets. It is possible to control the transmit power of the uplink data channel based on a single transmit power control equation applying the transmit power control parameter or a parameter set. Specific contents thereof are the same as those described in detail in Example 3-1-1.

One parameter or parameter set for applying to a single transmission power control equation may be independently transmitted to a corresponding terminal through higher layer signaling, explicitly indicated through physical layer control signaling, or implicitly indicated. .

In step S2320 of receiving an uplink data channel, power control of the uplink data channel is performed by applying one of the plurality of transmit power control equations to be applied to the uplink data channel. Can be applied. Specific contents thereof are the same as those described in detail in Example 3-1-2.

Referring to FIG. 24, the base station 2400 according to another embodiment includes a controller 2410, a transmitter 2420, and a receiver 2430.

The control unit 2410 is a method for controlling the transmission power of the uplink data channel in the next-generation wireless network required to carry out the above-described invention, applying different power control parameter sets to the transmission power control function according to the target BLER It controls the overall operation of the base station 2400 according to the method characterized in that.

The transmitter 2420 and the receiver 2430 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.

The base station 2400 which receives the uplink data channel includes a control unit 2420 and an uplink data channel that explicitly transmits or implicitly instructs the terminal to control information indicating different power control on the uplink data channel. It may include a receiver 2430 for receiving an uplink data channel to which different power control is applied.

The controller 2410 applies a transmission power control equation for a single uplink data channel, but applies a transmission power control equation for a single uplink data channel, but applies a plurality to the transmission power control equation. Transmit power of the uplink data channel based on a single transmit power control equation applying a transmit power control parameter or parameter set of one of the plurality of set power control parameters or parameter sets. Can be controlled. Specific contents thereof are the same as those described in detail in Example 3-1-1.

One power control parameter or parameter set for applying to a single transmission power control equation may be independently transmitted to a corresponding terminal through higher layer signaling, explicitly indicated through physical layer control signaling, or implicitly indicated. Can be.

A method in which one power control parameter or parameter set is implicitly indicated through physical layer control signaling may be indicated by an RNTI value scrambled in a CRC for the physical layer control channel transmission.

The power control for the uplink data channel may be applied by applying one of the plurality of transmit power control equations to be applied to the uplink data channel. Specific contents thereof are the same as those described in detail in Example 3-1-2.

The method in which one power control equation is implicitly indicated through physical layer control signaling may be indicated by an RNTI value scrambled in the CRC for physical layer control channel transmission.

Referring to FIG. 25, the user terminal 2500 according to the third embodiment includes a receiver 2510, a controller 2520, and a transmitter 2530.

The receiver 2510 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 2520 controls the overall operation of the user terminal 2500 according to the method for controlling the transmission power of the uplink data channel in the next generation wireless network required to perform the above-described present invention.

The transmitter 2530 transmits uplink control information, data, and a message to a base station through a corresponding channel.

The terminal 2500 for controlling the transmission power of the uplink data channel includes a control unit 2520 for applying different power control to the uplink data channel and a transmitter 2530 for transmitting an uplink data channel to which different power control is applied. It may include.

The controller 2520 applies a transmission power control equation for a single uplink data channel, sets a plurality of power control parameters or parameter sets to be applied to the transmission power control equation, and sets the plurality of power control parameters. Alternatively, the transmit power of the uplink data channel may be controlled based on a transmit power control parameter of one of the parameter sets or a single transmit power control equation applying the parameter set. Specific contents thereof are the same as those described in detail in Example 3-1-1.

The controller 2520 defines a plurality of transmission power control equations for applying to the uplink data channel, and applies one of the plurality of transmission power control equations to the uplink data channel. Power control can be applied. Specific contents thereof are the same as those described in detail in Example 3-1-2.

According to the embodiments described above, it is possible to efficiently control the transmission power of the uplink data channel in the next generation wireless network.

According to the embodiments described above, multiplexing uplink data transmission resources between terminals having different latency requirements in a next-generation wireless network efficiently or having different latency requirements The terminal can efficiently control the power of the uplink data channel.

The contents described in the first to third embodiments can be independently applied to other embodiments. For example, in Embodiment 2, multiplexing of uplink data channel transmission between terminals is described. In Embodiment 3, multiple transmission power control of uplink data channel based on reliability request is described in one terminal. In this case, while in the second embodiment, multiplexing of uplink data channel transmission between terminals may be applied, and in the third embodiment, multiple transmission power control of a reliability request based uplink data channel may be applied in one terminal.

The above embodiments provide a transmission power control method of an uplink data channel and a transmission operation of a terminal in a next generation wireless network, but the present invention is not limited thereto.

For example, the present invention includes a transmission power control method of an uplink data channel and a transmission operation of a terminal in a next generation wireless network. For example, the plurality of uplink transmissions may include PUCCH and PUSCH, PUCCH and PUCCH, PUSCH and SRS, and PUCCH and SRS.

The above-described embodiments may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802, 3GPP and 3GPP2. That is, steps, components, and parts which are not described in order to clearly reveal the present technical spirit of the embodiments may be supported by the aforementioned standard documents. In addition, all terms disclosed herein may be described by the standard documents disclosed above.

The above-described embodiments may be implemented through various means. For example, the embodiments may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, the method according to the embodiments may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), FPGAs. (Field Programmable Gate Arrays), a processor, a controller, a microcontroller, a microprocessor, and the like.

In the case of an implementation by firmware or software, the method according to the embodiments may be implemented in the form of an apparatus, procedure, or function for performing the functions or operations described above. The software code may be stored in a memory unit and driven by a processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

In addition, the terms "system", "processor", "controller", "component", "module", "interface", "model" and "unit" described above generally refer to computer-related entity hardware, hardware and software. May mean a combination, software, or running software. For example, the aforementioned components may be, but are not limited to, a process driven by a processor, a processor, a controller, a control processor, an object, an execution thread, a program, and / or a computer. For example, both an application running on a controller or processor and a controller or processor can be components. One or more components can reside within a process and / or thread of execution and a component can be located on one system or deployed on more than one system.

The above description and the accompanying drawings are merely illustrative of the technical idea, and a person of ordinary skill in the art may combine, separate, substitute, and substitute the components without departing from the essential characteristics of the present technology. Many modifications and variations, including variations, are possible. Accordingly, the embodiments disclosed herein are not intended to limit the present invention, but to describe the present invention, and the scope of the present invention is not limited thereto. The scope of protection of the technical idea should be interpreted by the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present specification.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application is filed with Korea Patent Application No. 10-2018-0037376 filed on March 30, 2018 and Korea Patent Application No. 10-2018-0038304 filed on April 02, 2018 and March 2019. Patent Application No. 10-2019-0036129 filed with Korea on 28 th is claimed in accordance with US Patent Law Section 119 (a) (35 USC § 119 (a)), all of which are incorporated by reference. Incorporated into the application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims

In the method for the terminal to control the transmission power of the uplink data channel,

Transmitting an uplink data channel according to a first transmit power control;

Receiving an uplink discontinuous TPC command; And

Adjusting the transmit power of the uplink data channel being transmitted to a second transmit power control based on the uplink discontinuous TPC command.
The method of claim 1,

In the step of receiving the uplink discontinuous TPC command, the uplink discontinuous TPC command is monitored based on monitoring configuration information for the uplink discontinuous TPC command,

The monitoring setting information,

And a control resource set (CORESET) and a search space configuration information, a radio network temporary identifier (RNTI) configuration information, and a monitoring cycle configuration information for monitoring the uplink discontinuous TPC command.
The method of claim 1,

The uplink discontinuous TPC command,

A method indicated through UE-specific DCI or UE-group common DCI.
The method of claim 1,

Adjusting the transmission power of the uplink data channel to the second transmission power control,

And transmitting a transmission power of the uplink data channel to the second transmission power control after a predetermined delay time elapses when the uplink discontinuous TPC command is received.
The method of claim 1,

Adjusting the transmission power of the uplink data channel to the second transmission power control,

The transmission of the uplink data is stopped in the slot in which the uplink discontinuous TPC command is received or the uplink is performed on all of the plurality of slots allocated based on uplink data channel resource allocation information for the uplink data channel. Adjusting the transmit power of a link data channel to said second transmit power control.
The method of claim 1,

The uplink discontinuous TPC command,

And a readjustment period for adjusting a transmission power of the uplink data channel to the second transmission power control.

Adjusting the transmission power of the uplink data channel to the second transmission power control,

Adjusting transmission power of the uplink data channel to second transmission power control during the readjustment period, and adjusting transmission power of the uplink data channel to the first transmission power control after the readjustment period elapses.
In a terminal for transmitting an uplink data channel,

A transmitter for transmitting an uplink data channel according to a first transmit power control;

A receiver for receiving an uplink discontinuous TPC command; And

And a controller configured to adjust transmission power of the uplink data channel being transmitted to second transmission power control based on the uplink discontinuous TPC command.
The method of claim 7, wherein

The receiving unit monitors the uplink discontinuous TPC command based on the monitoring configuration information for the uplink discontinuous TPC command,

The monitoring setting information,

And a control resource set (CORESET) and search space (search space) configuration information, a Radio Network Temporary Identifier (RNTI) configuration information, and a monitoring cycle configuration information for monitoring the uplink discontinuous TPC command.
The method of claim 7, wherein

The control unit,

And a terminal for adjusting transmission power of the uplink data channel to second transmission power control after a predetermined delay time elapses when the uplink discontinuous TPC command is received.
The method of claim 7, wherein

The control unit,

Re-adjust the transmit power of the uplink data channel in the slot in which the uplink discontinuous TPC command is received or for all of the plurality of slots allocated based on uplink data channel resource allocation information for the uplink data channel. A terminal for readjusting the transmission power of the uplink data channel.
The method of claim 7, wherein

The uplink discontinuous TPC command,

And a readjustment period for adjusting a transmission power of the uplink data channel to the second transmission power control.

The control unit,

And adjusting the transmission power of the uplink data channel to the second transmission power control during the readjustment period, and adjusting the transmission power of the uplink data channel to the first transmission power control after the readjustment period elapses.
In the method for the terminal to control the transmission power of the uplink data channel,

Applying different power control for transmission of the uplink data channel; And

Transmitting the uplink data channel to which different power control is applied.
The method of claim 13,

In the step of applying different power control to the transmission of the uplink data channel,

Apply a transmission power control equation for a single uplink data channel, set a plurality of power control parameters or parameter sets to apply to the transmission power control equation,

And a method of controlling transmit power of an uplink data channel based on the single transmit power control equation to which one transmit power control parameter or parameter set of the plurality of set power control parameters or parameter sets is applied.
The method of claim 14,

The power control parameter or parameter set is set to the corresponding terminal through higher layer signaling.
The method of claim 14,

One power control parameter or parameter set to be applied to the single transmission power control equation is set to the corresponding terminal through higher layer signaling, explicitly indicated through physical layer control signaling, or implicitly indicated. .
The method of claim 16,

A method in which one power control parameter or parameter set is implicitly indicated through physical layer control signaling

And an RNTI value scrambled in a CRC for the physical layer control channel transmission.
The method of claim 17,

In the step of applying different power control to the uplink data channel transmission,

Define a plurality of transmit power control equations to apply to the uplink data channel,

And applying power control for one of the plurality of transmission power control equations to apply power control for the uplink data channel.
The method of claim 17,

One of the transmit power control equations for the uplink data channel further comprises a power boosting related parameter.
The method of claim 17,

One transmission power control equation to be applied to the uplink data channel transmission is set through higher layer signaling or explicitly or implicitly indicated through physical layer control signaling.
The method of claim 19,

A method in which one power control equation is implicitly indicated through physical layer control signaling is

And an RNTI value scrambled in a CRC for the physical layer control channel transmission.