WO2019190264A1 - Method and device for transmitting uplink data channel - Google Patents

Abstract

The present embodiments provide a method for transmitting an uplink data channel for supporting ultra reliable and low latency communications (URLLC) and an enhanced mobile broadband (eMBB) service in a next generation/5G wireless access, and a device therefor.

Description

Method and apparatus for transmitting uplink data channel

The present embodiments propose a method and apparatus for transmitting 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 transmitting an uplink data channel in various cases in which a plurality of uplink data channel transmissions occur simultaneously in one terminal in a next generation wireless network.

According to an embodiment of the present invention, a method for transmitting an uplink data channel by a user equipment includes a first resource allocation information for a first uplink data channel and a second resource for a second uplink data channel. Receiving the allocation information from the base station, and transmitting the first uplink data channel and the second uplink data channel at least partially in time based on the first and second resource allocation information. A method comprising preferentially assigning transmit power to one of the link data channels and adjusting transmit power for the other.

In addition, according to an embodiment of the present invention, a base station receives an uplink data channel, transmitting first and second resource allocation information to first and second resources for first and second uplink data channels, and first and second resources, respectively. When the first and second uplink data channels are to be transmitted at least partially overlapping in time based on the allocation information, one of the first and second uplink data channels is preferentially allocated transmission power, and It provides a method comprising the step of receiving an uplink data channel of the transmission power is adjusted uplink data channel.

In addition, an embodiment includes a receiver for receiving first and second resource allocation information for first and second uplink data channels from a base station, and first and second uplink based on the first and second resource allocation information, respectively. When the data channels need to be transmitted at least partially overlapped in time, the terminal may include a control unit that allocates transmission power to one of the first and second uplink data channels and adjusts the transmission power for the other one. do.

According to the present embodiments, uplink data channels can be efficiently transmitted in various cases in which a plurality of uplink data channel transmissions occur simultaneously in one terminal in a 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. 9 is a diagram illustrating a conceptual example of a bandwidth part to which the present embodiment can be applied.

10 illustrates that a plurality of PUSCH transmissions occur simultaneously.

FIG. 11 is a diagram illustrating a case in which a collision occurs between a first PUSCH and a second PUSCH having different durations in one terminal in a duration based priority setting method according to the first embodiment.

FIG. 12 is a diagram illustrating a case in which a collision occurs between an uplink grant based first PUSCH and a grant-free based second PUSCH in one UE in a method for setting priority based on UL grant reception according to Embodiment 2; FIG. to be.

FIG. 13 is a diagram illustrating a case in which a priority is determined based on different uplink grant transmission / reception timings in one terminal in a method for setting priority based on uplink grant reception timing according to the third embodiment.

14 is a flowchart illustrating a method of transmitting an uplink data channel by a terminal in this embodiment.

15 is a flowchart of a method for a base station to receive an uplink data channel in this embodiment.

16 is a diagram illustrating a configuration of a base station according to another embodiment.

17 is a diagram illustrating a configuration of a user terminal according to another 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.

 <NR system general>

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.

 <NR waveform, pneumatic and frame structure>

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 the slot format by using the SFI to indicate the index of the table configured through the RRC signaling to the terminal specific, and may be indicated dynamically through the downlink control information (DCI) or statically or quasi-statically through the RRC. It may be.

 <NR Physical Resource>

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.

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

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.

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

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.

 <NR initial connection>

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.

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

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.

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

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.

 <NR CORESET>

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)

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.

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 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 (multiplexing).

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 method of supporting multiplexing and a scheduling unit in a time domain, a method of supporting one or more time units has been discussed. 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 by using TDM and / or FDM schemes, a number of numerology having different SCS values in one NR carrier is supported for each numerology. Scheduling data according to a latency requirement based on a defined slot (or mini slot) length 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

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

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. .

 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.

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 is specified through dedicated RRC signaling for each terminal. A 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. .

Herein is a method for transmitting a physical uplink shared channel (PUSCH) including uplink data / control information for satisfying different service requirements in a wireless mobile communication system such as LTE / LTE-A and NR Suggest for In particular, the present specification proposes a method of transmitting a PUSCH of a terminal when a plurality of PUSCH transmission resource allocations are made through the same slot (s) or symbol (s) in one terminal.

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

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.

As a method for satisfying different reliability requirements as described above, the present specification provides a collision between a plurality of PUSCH transmissions based on different reliability requirements when transmitting uplink data in one UE (that is, a plurality of UEs). In case of time-domain overlap between PUSCH transmissions, a specific PUSCH transmission of a UE and a transmission power control method according thereto are proposed.

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.

When a UE transmits one or more slot (s) or a mini-slot based (i.e. non-slot based) PUSCH, the UE derives a PUSCH transmission power value by Equation (1).

According to Equation 1, when a UE transmits a PUSCH, the UE sets a corresponding PUSCH transmission power value according to a path attenuation value between the base station and the corresponding UE, the number of allocated resource blocks, higher layer parameters, and a TPC comment value, and the corresponding derivation. When the transmitted power value is greater than the P _CMAX value, which is the maximum transmit power value set for the UE, the PUSCH is transmitted based on the corresponding maximum transmit power value.

However, as described above, in order to support low-delay / high reliability URLLC data, not only slot-based or multiple slots-based PUSCH transmission through an uplink grant, but also through an uplink grant Non-slot based PUSCH transmission or grant-free based PUSCH transmission may occur.

In more detail, the uplink grant-based PUSCH transmission is scheduled PUSCH transmission, ie, dynamic grand based, through dynamic L1 signaling in which resource allocation information for PUSCH transmission is transmitted through a PDCCH, which is a physical layer control channel. Means PUSCH transmission.

On the other hand, grant-free PUSCH transmission is a PUSCH transmission based on RRC signaling or RRC signaling + physical layer control signaling, and basically means a PUSCH transmission scheduled through a configured grant. For example, grant-free PUSCH transmission includes type-1 configured grant-based PUSCH transmission in which all scheduling related information for PUSCH transmission is transmitted through ConfiguredGrantConfig information transmitted through higher layer signaling, and higher layer signaling. And the type-2 configured grant (type-2 configured grant) based PUSCH transmission through which scheduling information is transmitted through the uplink grant.

10 illustrates that a plurality of PUSCH transmissions occur simultaneously.

Referring to FIG. 10, since uplink grant based PUSCH transmission and grant-free based PUSCH transmission occur, a plurality of PUSCH transmissions having different time durations (first PUSCH and first PU) in one UE are generated. 2PUSCH) may occur simultaneously ((a) to (c) of FIG. 10). As shown in (a) of FIG. 10, the second PUSCH transmission may be fully overlapped in the time-domain with the first PUSCH transmission. In addition, as shown in FIG. 10A, the second PUSCH transmission may be partially overlapped in the time-domain with the first PUSCH transmission.

As shown in FIG. 10D, a plurality of PUSCH transmissions having the same duration with each other may occur simultaneously in one UE.

When a plurality of PUSCH transmissions (first PUSCH and second PUSCH) occur at the same time, it is necessary to define a PUSCH transmission operation of the UE. In more detail, a definition of a power allocation method for the plurality of PUSCH transmissions is required.

The present specification proposes a PUSCH transmission operation and a PUSCH transmission power control method in various cases where a plurality of PUSCH transmissions simultaneously occur in one terminal. In particular, the present specification proposes a priority-based PUSCH transmission power allocation method when a plurality of PUSCH transmissions simultaneously occur in one UE.

The transmission power allocation described below means transmission power allocation for actually transmitting the corresponding PUSCH, and accordingly, whether to transmit the corresponding PUSCH is determined. Also, below, two first PUSCHs and a second PUSCH are described as a plurality of PUSCH transmissions, but the plurality of PUSCH transmissions may be two or more than two.

Hereinafter, prioritizing methods for assigning PUSCH transmission power when a plurality of PUSCH transmissions occur simultaneously in one UE will be described. Next, a method of transmitting and receiving an uplink data channel to which the UE and the base station apply these priority setting methods will be described.

Example 1 Time-Duration Based Priority  How to set up

When different PUSCH transmissions occur at the same time in one UE, the UE may select a PUSCH to transmit preferentially or to allocate transmission power preferentially based on time-domain resource allocation information between the corresponding PUSCH transmissions.

In more detail, when a plurality of PUSCH transmissions simultaneously occur in one UE, the UE may preferentially transmit one of the plurality of PUSCH transmissions based on each PUSCH transmission duration.

For example, the UE may preferentially transmit the PUSCH having the shortest PUSCH duration based on each PUSCH transmission duration. In contrast, the UE may preferentially transmit a PUSCH having the longest PUSCH duration based on each PUSCH transmission duration.

In other words, the UE may preferentially allocate transmit power to the PUSCH of the shortest duration among the plurality of PUSCHs. In contrast, the UE may preferentially allocate transmit power to the PUSCH of the longest duration of the plurality of PUSCHs.

In the former case, the transmission power may be preferentially allocated to the PUSCH transmission of the shortest duration, and all the PUSCH transmissions of the shortest duration and other PUSCH transmissions overlapping in the time-domain may be dropped. In this case, dropping the PUSCH transmission may include not transmitting the PUSCH or setting the PUSCH transmission power to “zero”. As another example, the transmission power may be preferentially allocated to the PUSCH transmission of the shortest duration, and the remaining power may be allocated to the next PUSCH transmission.

The duration-based priority setting method according to the first embodiment may be applied only within an overlapping symbol, applied to all symbols after a symbol interval in which overlapping has started, or may be applied to the entire PUSCH transmission.

FIG. 11 is a diagram illustrating a case in which a collision occurs between a first PUSCH and a second PUSCH having different durations in one terminal in a duration based priority setting method according to the first embodiment.

As shown in FIG. 11, when a first PUSCH transmission allocated in a slot unit and a non-slot based second PUSCH transmission of 2 symbols are allocated, a second PUSCH transmission having a short transmission duration in a time-domain is allocated. Priority is given, and accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

In this case, irrespective of the overlapping symbol intervals as described above, i) drop the entire first PUSCH transmission, ii) drop the transmission of the first PUSCH only for the corresponding symbol interval, or iii) the symbol at which the overlap is started. The transmission of the first PUSCH may be dropped only for subsequent symbols.

ii) As a specific example of dropping the transmission of the first PUSCH only for the corresponding symbol interval, as shown in FIG. 11, the UE drops the first PUSCH transmission only for the 8th and 9th symbols, and in other symbols. Normally, the first PUSCH may be transmitted.

iii) As a specific example of dropping transmission of the first PUSCH only for symbols after the symbol at which overlapping starts, as shown in FIG. 11, the UE normally transmits the first PUSCH up to the seventh symbol before overlapping starts. The first PUSCH transmission may be dropped from the eighth symbol to the last symbol.

As shown in FIG. 11, when the first PUSCH transmission allocated in the slot unit and the second PUSCH transmission based on the non-slot of 2 symbols are allocated, the UE preferentially provides the equation 1 or the new PUSCH for the second PUSCH. When the equation for the transmission power is defined, the PUSCH transmission power may be allocated according to the new equation, and when there is remaining transmission power, the remaining transmission power may be allocated for the first PUSCH transmission.

Also in this case, as in the above-described example of the PUSCH transmission drop, i) the transmission power is defined for all the first PUSCH transmissions based on the remaining power excluding the second PUSCH transmission power, or ii) only for the interval in which the overlap is made. When the transmission power is based on the remaining power except for the second PUSCH transmission power, and the equation for Equation 1 or the new PUSCH transmission power is normally defined in the remaining sections, the first PUSCH transmission power may be allocated according to the new equation. .

Alternatively, iii) the transmission power is allocated on the basis of the remaining power except for the second PUSCH transmission power only for the symbols after the symbol at which the overlap is started, and in the remaining intervals, Equation 1 or the equation for the new PUSCH transmission power may be normally defined. In this case, the first PUSCH transmission power may be allocated according to the new equation.

However, in the case of giving priority to PUSCH transmission having a long PUSCH transmission duration, the same method as in the case of giving priority to PUSCH transmission having the shortest PUSCH transmission duration may be applied.

 Embodiment 2. Uplink Grant Received Based Priority  How to set up

When a collision occurs between a plurality of PUSCH transmissions in one UE, as another method of transmitting a PUSCH, the UE may determine the priority between the corresponding PUSCHs according to whether an uplink grant is received. That is, the terminal may determine the priority of the corresponding PUSCH according to the uplink grant based PUSCH transmission or the grant-free based PUSCH transmission.

As an example, the UE may preferentially perform grant-free based PUSCH transmission. That is, grant-based PUSCH transmission set in type 1 or grant-based PUSCH transmission set in type 2 may have priority over dynamic uplink grant-based PUSCH transmission.

In more detail, when uplink grant-based PUSCH transmission and grant-free based PUSCH transmission occur simultaneously in one UE, the UE may preferentially transmit the grant-free PUSCH. That is, the UE drops all grant-based PUSCH transmissions and all UL grant-based PUSCH transmissions completely or partially overlapped in the time-domain or preferentially transmits grant-free PUSCH transmissions. Power may be allocated, and the remaining power may be allocated for uplink grant-based PUSCH transmission.

FIG. 12 is a diagram illustrating a case in which a collision occurs between an uplink grant based first PUSCH and a grant-free based second PUSCH in one UE in a method for setting priority based on UL grant reception according to Embodiment 2; FIG. to be.

Referring to FIG. 12, when a collision occurs between uplink grant-based first PUSCH transmission and grant-free second PUSCH transmission in one UE, the UE may be configured to transmit a second PUSCH transmission that is grant-free PUSCH transmission. Priority can be given to the first PUSCH transmission, except for the second PUSCH.

In this case, irrespective of the overlapping symbol intervals as described above, i) drop the entire first PUSCH transmission, ii) drop the transmission of the first PUSCH only for the corresponding symbol interval, or iii) the symbol at which the overlap is started. The transmission of the first PUSCH may be dropped only for subsequent symbols.

ii) As a specific example of dropping transmission of the first PUSCH only for the corresponding symbol interval, as shown in FIG. 12, the UE drops the first PUSCH transmission only for the corresponding 8th and 9th symbols, and in other symbols. Normally, the first PUSCH may be transmitted.

iii) As a specific example of dropping transmission of the first PUSCH only for symbols after the symbol at which overlapping starts, as shown in FIG. 11, the UE normally transmits the first PUSCH up to the seventh symbol before overlapping starts. The first PUSCH transmission may be dropped from the eighth symbol to the last symbol.

As shown in FIG. 12, when uplink grant-based PUSCH transmission and grant-free based PUSCH transmission are allocated, the UE preferentially calculates Equation 1 or new PUSCH transmission power for the grant-free based second PUSCH. If the equation is defined, the PUSCH transmission power may be allocated according to the new equation, and if there is remaining transmission power, the remaining transmission power may be allocated for the uplink grant-based first PUSCH transmission.

Also in this case, as in the above-described example of the PUSCH transmission drop, i) the transmission power is defined for all the first PUSCH transmissions based on the remaining power excluding the second PUSCH transmission power, or ii) only for the interval in which the overlap is made. When the transmission power is based on the remaining power except for the second PUSCH transmission power, and the equation for Equation 1 or the new PUSCH transmission power is normally defined in the remaining sections, the first PUSCH transmission power may be allocated according to the new equation. .

Alternatively, iii) the transmission power is allocated on the basis of the remaining power except for the second PUSCH transmission power only for the symbols after the symbol at which the overlap is started, and in the remaining intervals, Equation 1 or the equation for the new PUSCH transmission power may be normally defined. In this case, the first PUSCH transmission power may be allocated according to the new equation.

However, in the case of giving priority to an uplink grant-based PUSCH (first PUSCH), the same method as in the case of giving priority to a grant-free based PUSCH (second PUSCH) may be applied.

In addition, in case of collision between grant-based PUSCH transmissions, priority may be defined according to a corresponding grant type. For example, grant based on type 1 configured PUSCH transmission may be preferred to grant based on type 2 grant PUSCH, or conversely, type 2 configured based on grant PUSCH transmission may be preferred to type 1 configured grant based PUSCH transmission. Can be. The specific PUSCH transmission method according to this may follow the above description.

 Embodiment 3. Uplink Grant Receive Timing Based Priority  How to set up

When a collision occurs between a plurality of PUSCH transmissions in one UE, as another method of transmitting a PUSCH, the UE may determine the priority between corresponding PUSCHs based on transmission / reception timing of an uplink grant corresponding to each PUSCH.

As an example, the UE may preferentially transmit the PUSCH having the most recent UL grant transmission / reception time point. That is, when a plurality of PUSCH transmissions overlap in whole or in part in a time-domain in one UE, the uplink grant transmission time corresponding to each PUSCH is transmitted with priority for the most recent PUSCH, and the remaining PUSCHs are transmitted. May drop or allocate transmit power preferentially to the most recently transmitted and received PUSCH and allocate the remaining power to other PUSCHs.

FIG. 13 is a diagram illustrating a case in which a priority is determined based on different uplink grant transmission / reception timings in one terminal in a method for setting priority based on uplink grant reception timing according to the third embodiment.

Referring to FIG. 13, when a collision occurs between a first PUSCH transmission and a second PUSCH transmission in one terminal, the terminal gives priority to a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH. Accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

In this case, irrespective of the overlapping symbol intervals as described above, i) drop the entire first PUSCH transmission, ii) drop the transmission of the first PUSCH only for the corresponding symbol interval, or iii) the symbol at which the overlap is started. The transmission of the first PUSCH may be dropped only for subsequent symbols.

ii) As a specific example of dropping transmission of the first PUSCH only for the corresponding symbol interval, as shown in FIG. 13, the UE drops the first PUSCH transmission only for the corresponding 8th and 9th symbols, and in other symbols. Normally, the first PUSCH may be transmitted.

iii) As a specific example of dropping the transmission of the first PUSCH only for the symbols after the symbol at which the overlap is started, as shown in FIG. 13, the UE normally transmits the first PUSCH up to the seventh symbol before the overlap is started. The first PUSCH transmission may be dropped from the eighth symbol to the last symbol.

As shown in FIG. 13, when a corresponding equation (1) or a new PUSCH transmission power is defined for a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH, the UE corresponds to a new PUSCH according to the new equation. The transmit power may be allocated, and when there is remaining transmit power, the remaining transmit power may be allocated for the first PUSCH transmission.

Also in this case, as in the above-described example of the PUSCH transmission drop, i) the transmission power is defined for all the first PUSCH transmissions based on the remaining power excluding the second PUSCH transmission power, or ii) only for the interval in which the overlap is made. When the transmission power is based on the remaining power except for the second PUSCH transmission power, and the equation for Equation 1 or the new PUSCH transmission power is normally defined in the remaining sections, the first PUSCH transmission power may be allocated according to the new equation. .

Alternatively, iii) the transmission power is allocated on the basis of the remaining power except for the second PUSCH transmission power only for the symbols after the symbol at which the overlap is started, and in the remaining intervals, Equation 1 or the equation for the new PUSCH transmission power may be normally defined. In this case, the first PUSCH transmission power may be allocated according to the new equation.

However, in the case where priority is given to a PUSCH (first PUSCH) having a fast uplink grant transmission time, the same method as in the case of giving priority to a PUSCH (second PUSCH) recently receiving an uplink grant for the corresponding PUSCH is performed. Can be applied.

 Example 4. Mapping  Type-based Priority  How to set up

As another method of transmitting each PUSCH when a collision occurs between a plurality of PUSCH transmissions in one UE, the UE is based on a PUSCH mapping type (ie, mapping type A vs. mapping type B) defined in 3GPP TS 38.214. The priority between the corresponding PUSCH transmissions can be determined.

As an example of this, it is possible to preferentially transmit the mapping type B based PUSCH transmission to the mapping type A based PUSCH transmission. That is, when PUSCH transmissions of different mapping types are overlapped in whole or in part in a time-domain in one UE, the UE transmits the priority with respect to the mapping type B-based PUSCH and transmits the mapping type A-based PUSCH. May drop or allocate transmit power preferentially for the mapping type B based PUSCH and allocate the remaining power for other PUSCH (ie, mapping type A based PUSCH) transmission.

On the contrary, the UE may preferentially transmit the mapping type A based PUSCH transmission compared to the mapping type B based PUSCH transmission.

As described above, the specific method of determining the PUSCH transmission priority based on the mapping type may be applied in the same manner as the embodiments described in the first to third embodiments, and the detailed embodiment will be omitted.

Additionally, the base station may signal the configuration information related to the PUSCH transmission priority rule according to the plurality of PUSCH transmission collision scenarios described above for each of the above-described embodiments.

For example, when a plurality of PUSCH transmission collisions between the grant set and the dynamic grant according to the above-described embodiment 2 occur, the base station sets higher priority PUSCH configuration information that should be transmitted first by the corresponding UE and sets it to a higher layer. It may be transmitted to the corresponding terminal through signaling or physical layer control signaling.

For example, the base station may set the priority or priority level configuration information for the PUSCH collision between the uplink grant and the dynamic uplink grant configured as in the second embodiment and transmit the same through the higher layer signaling. have.

Priority means priority for PUSCH transmission, which can be defined as any high, medium, low level, etc., and the priority level is a numerical value. That is, a specific constant is mapped to the priority of each PUSCH transmission, and may be set / indicated by the base station as an arbitrary natural number or an integer greater than or equal to zero, and the UE maps the priority level mapped for each PUSCH transmission. By comparing the values, PUSCH transmission having a higher priority among PUSCH transmissions with collision may be determined. For example, the UE may be defined such that a PUSCH having a higher priority level or a PUSCH having a lower priority level is determined by a PUSCH transmission having a higher priority.

As an example, the base station may set the priority or priority level of the configured grant-based PUSCH through higher layer signaling or ConfiguredGrantConfig , which is configured for higher layer signaling for transmitting uplink grant information. The UE may preferentially transmit a PUSCH having a higher priority or a PUSCH having a higher priority level according to the corresponding priority or priority level configuration information.

That is, when the priority or priority level for the configured uplink grant PUSCH is set to be high, the UE preferentially transmits the PUSCH for the uplink grant according to the second embodiment and, conversely, the priority for the configured uplink grant. Alternatively, when the priority level is set low, the dynamic uplink grant-based PUSCH may be preferentially transmitted.

Alternatively, the priority or priority level may be defined to be indicated through physical layer control signaling, that is, a dynamic uplink grant.

Alternatively, for each grant-based PUSCH, a priority or priority level for the corresponding grant-based PUSCH may be configured through higher layer signaling. For dynamic grant-based PUSCH transmission, a corresponding grant for each PUSCH transmission may be set. It may be defined to dynamically indicate a priority or priority level of a corresponding PUSCH through a dynamic grant, that is, a UL grant DCI format transmitted through a PDDCH. Accordingly, when a grant-based PUSCH collides with a dynamic grant-based PUSCH, dynamic priority for each PUSCH transmission indicated by a priority or priority level setting value for a corresponding grant-based PUSCH and an uplink grant Alternatively, the priority level indication value may be compared to define the priority of the corresponding PUSCH transmissions in the terminal.

Accordingly, when collision occurs between PUSCH transmissions indicated by the dynamic uplink grant in Embodiments 1 to 4, or when collision occurs between a dynamic uplink grant based PUSCH transmission and a configured uplink grant based PUSCH transmission, a base station May transmit the priority or priority level indication information for the PUSCH transmission based on the corresponding dynamic uplink in the corresponding uplink grant. The UE may determine the PUSCH transmission priority based on the PUSCH transmission priority described in the above-described embodiments 1 to 4 according to the value.

Alternatively, priority or priority level between PUSCH transmissions may be separately indicated through separate physical layer control signaling for each slot or slot group. In this case, whether the priority or priority level information region is indicated through the corresponding physical layer control signaling may be set by the base station through UE-specific or cell-specific higher layer signaling.

As such, when priority or priority level information is set / instructed through higher layer signaling or physical layer control signaling, when there is a collision between any PUSCH transmissions, the UE may have higher priority or higher priority according to the corresponding configuration / instruction information. The PUSCH of the level may be transmitted preferentially. In case the priority or priority level is not set / indicated, the UE may define the priority rule defined in the above-described Embodiments 1 to 4 as a default operation and perform PUSCH transmission based on this.

In addition, the present invention may be applied to all cases in which priority between corresponding PUSCH transmissions is determined in the form of all combinations of the above-described embodiments 1 to 4.

14 is a flowchart illustrating a method of transmitting an uplink data channel by a terminal in this embodiment.

Referring to FIG. 14, in a method of transmitting an uplink data channel, a terminal receives first resource allocation information for a first uplink data channel and second resource allocation information for a second uplink data channel from a base station, respectively. In step 1410 and when the first uplink data channel and the second uplink data channel need to be transmitted at least partially overlapped in time based on the first and second resource allocation information, one of the first and uplink data channels. In step S1420, the transmission power may be allocated to one of the priorities, and the transmission power of the other may be adjusted.

Adjusting the transmit power for the other one may be performed by first assigning transmit power to one of the first and second uplink data channels and allocating the remaining transmit power to the other or zeroing the transmit power to zero. It may be to drop the remaining uplink data channel transmission.

When the remaining transmit power is allocated to the other of the first and second uplink data channels or the transmit power is zero and the transmit power is zero, the remaining uplink data channel transmission is dropped. The remaining uplink data channel transmission can be performed by allocating the remaining transmit power only within the symbol overlapping the link data channels in time or after all symbols and all symbols after the overlapping symbol, or with the transmit power zero. You can drop it.

The priority setting method may include priority setting methods according to the first to fourth embodiments, for example, a time-duration-based priority setting method, an uplink grant reception priority-based priority setting method, An uplink grant reception timing based priority setting method and a mapping type based priority setting method may be provided.

According to the time-duration priority setting method according to the first embodiment, when the transmission power is preferentially allocated to one of the first and second uplink data channels, the first and second uplink data channels The transmit power may be allocated to the uplink data channel having the shortest duration or the longest duration among the durations.

As shown in FIG. 11, when a first PUSCH transmission allocated in a slot unit and a non-slot based second PUSCH transmission of 2 symbols are allocated, a second PUSCH transmission having a short transmission duration in a time-domain is allocated. Priority is given, and accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

As shown in FIG. 11, when the first PUSCH transmission allocated in the slot unit and the second PUSCH transmission based on the non-slot of 2 symbols are allocated, the UE preferentially provides the equation 1 or the new PUSCH for the second PUSCH. When the equation for the transmission power is defined, the PUSCH transmission power may be allocated according to the new equation, and when there is remaining transmission power, the remaining transmission power may be allocated for the first PUSCH transmission.

According to the uplink grant reception priority setting method according to the second embodiment, in step S1410 of receiving first and second resource allocation information from the base station, one of the first and second resource allocation information is determined. The first downlink control channel may be received from the base station, and the other of the first and second resource allocation information may be received from the base station through one of the higher layer signaling and the higher layer signaling + the second downlink control channel.

When the transmission power is preferentially allocated to one of the first and second uplink data channels, the transmission power is preferentially allocated to the uplink data channel corresponding to the resource allocation information received through the first downlink control channel, The transmission power may be preferentially allocated to an uplink data channel corresponding to the resource allocation information received through one of the higher layer signaling and the higher layer signaling + second downlink control channel.

In step S1410 of receiving first and second resource allocation information from the base station, respectively, one of the first and second resource allocation information is received from the base station through the first upper layer signaling and the other is the second higher layer signaling. It can be received from the base station through the + downlink control channel.

When the transmission power is preferentially allocated to one of the first and second uplink data channels, the transmission power is preferentially allocated to the uplink data channel corresponding to the resource allocation information received through the first upper layer signaling. The transmission power may be preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the second upper layer signaling + downlink control channel.

Referring to FIG. 12, when a collision occurs between uplink grant-based first PUSCH transmission and grant-free second PUSCH transmission in one UE, the UE may be configured to transmit a second PUSCH transmission that is grant-free PUSCH transmission. Priority can be given to the first PUSCH transmission, except for the second PUSCH.

As shown in FIG. 12, when uplink grant-based PUSCH transmission and grant-free based PUSCH transmission are allocated, the UE preferentially calculates Equation 1 or new PUSCH transmission power for the grant-free based second PUSCH. If the equation is defined, the PUSCH transmission power may be allocated according to the new equation, and if there is remaining transmission power, the remaining transmission power may be allocated for the uplink grant-based first PUSCH transmission.

In addition, in case of collision between grant-based PUSCH transmissions, priority may be defined according to a corresponding grant type. For example, grant based on type 1 configured PUSCH transmission may be preferred to grant based on type 2 grant PUSCH, or conversely, type 2 configured based on grant PUSCH transmission may be preferred to type 1 configured grant based PUSCH transmission. Can be. The specific PUSCH transmission method according to this may follow the above description.

According to the uplink grant reception timing based priority setting method according to the third embodiment, when the transmission power is preferentially allocated to one of the first and second uplink data channels, the reception timing of the first and second resource allocation information is determined. Accordingly, it is possible to preferentially allocate transmit power to one of the first and second uplink data channels.

For example, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing among the first and second resource allocation information. On the contrary, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing.

Referring to FIG. 13, when a collision occurs between a first PUSCH transmission and a second PUSCH transmission in one terminal, the terminal gives priority to a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH. Accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

As shown in FIG. 13, when a corresponding equation (1) or a new PUSCH transmission power is defined for a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH, the UE corresponds to a new PUSCH according to the new equation. The transmit power may be allocated, and when there is remaining transmit power, the remaining transmit power may be allocated for the first PUSCH transmission.

According to the mapping type based priority setting method according to the fourth embodiment, when the transmission power is preferentially allocated to one of the first and second uplink data channels, according to the mapping type of the first and second uplink data channels. Transmission power may be allocated to one of the first and second uplink data channels first.

When allocating transmit power to one of the first and second uplink data channels preferentially, the first and second uplink data channels based on the priority setting information received through the higher layer signaling or the downlink control channel. The transmission power may be allocated to one of them first.

The priority setting information may indicate one of the following schemes.

i) A method of assigning transmit power preferentially to an uplink data channel having a shortest duration or a longest duration among time durations of the first and second uplink data channels (time duration according to Embodiment 1 -duration) based priority setting method),

ii) preferentially assign transmission power to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel, or receive it through one of higher layer signaling and higher layer signaling + second downlink control channel A method of preferentially allocating power to an uplink data channel corresponding to one resource allocation information (uplink grant receiving priority based on the second embodiment),

iii) a method of preferentially allocating transmission power to one of the first and second uplink data channels according to the reception timing of the first and second resource allocation information (uplink grant timing based on the uplink grant according to the third embodiment) Way),

iv) A method of preferentially allocating transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels (mapping type based priority setting method according to the fourth embodiment). ).

When the transmission power is preferentially allocated to one of the first and second uplink data channels and the priority setting information is not received, the first and second uplink data according to the predefined priority or the default priority. Transmit power may be allocated to one of the channels preferentially.

15 is a flowchart of a method for a base station to receive an uplink data channel in this embodiment.

Referring to FIG. 15, in the method of receiving an uplink data channel, the base station transmits first and second resource allocation information to the terminal for the first and second uplink data channels (S1510), and the first, When the first and second uplink data channels are to be transmitted at least partially overlapping in time based on the resource allocation information, one of the first and second uplink data channels is preferentially allocated with transmission power and the other one. And receiving an uplink data channel having an adjusted transmit power for the uplink data channel (S1520).

Adjusting the transmit power for the other one may be performed by first assigning transmit power to one of the first and second uplink data channels and allocating the remaining transmit power to the other or zeroing the transmit power to zero. It may be to drop the remaining uplink data channel transmission.

When the remaining transmit power is allocated to the other of the first and second uplink data channels or the transmit power is zero and the transmit power is zero, the remaining uplink data channel transmission is dropped. The remaining uplink data channel transmission can be performed by allocating the remaining transmit power only within the symbol overlapping the link data channels in time or after all symbols and all symbols after the overlapping symbol, or with the transmit power zero. You can drop it.

As described above, the priority setting method includes priority setting methods according to the first to fourth embodiments, for example, a time-duration-based priority setting method and an uplink grant reception status. Priority setting method, uplink grant reception timing based priority setting method, mapping type based priority setting method.

According to the time-duration based priority setting method according to the first embodiment, the shortest duration of the durations of the first and second uplink data channels among the first and second uplink data channels or Transmit power may be preferentially allocated to the uplink data channel of the longest duration.

According to the uplink grant reception priority setting method according to the second embodiment, in step S1510 of transmitting the first and second resource allocation information to the terminal, one of the first and the second resource allocation information is first transmitted. The terminal may be transmitted to the terminal through a downlink control channel, and the other one of the first and second resource allocation information may be transmitted to the terminal through one of upper layer signaling and upper layer signaling + second downlink control channel.

Transmit power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel among the first and second uplink data channels, or higher layer signaling and higher layer signaling + second Transmit power may be preferentially allocated to an uplink data channel corresponding to resource allocation information received through one of the downlink control channels.

In step S1510, transmitting the first and second resource allocation information to the terminal, one of the first and second resource allocation information is transmitted to the terminal through the first higher layer signaling and the other is the second higher layer signaling. It can be transmitted to the terminal through the + downlink control channel.

When the transmission power is preferentially allocated to one of the first and second uplink data channels, the transmission power is preferentially allocated to the uplink data channel corresponding to the resource allocation information received through the first upper layer signaling. The transmission power may be preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the second upper layer signaling + downlink control channel.

According to the uplink grant reception timing based priority setting method according to the third embodiment, transmit power is preferentially allocated to one of the first and second uplink data channels according to the reception timing of the first and second resource allocation information. Can be.

For example, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing among the first and second resource allocation information. On the contrary, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing.

According to the mapping type based priority setting method according to the fourth embodiment, transmit power may be preferentially allocated to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels. have.

Transmit power may be preferentially allocated to one of the first and second uplink data channels based on the priority setting information received through the higher layer signaling or the downlink control channel.

The priority setting information may indicate one of the following schemes.

i) A method of assigning transmit power preferentially to an uplink data channel having a shortest duration or a longest duration among time durations of the first and second uplink data channels (time duration according to Embodiment 1 -duration) based priority setting method),

ii) preferentially assign transmission power to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel, or receive it through one of higher layer signaling and higher layer signaling + second downlink control channel A method of preferentially allocating power to an uplink data channel corresponding to one resource allocation information (uplink grant receiving priority based on the second embodiment),

iii) a method of preferentially allocating transmit power to one of the first and second uplink data channels according to a reception timing of the first and second resource allocation information; (Uplink grant timing based priority setting method according to Embodiment 3),

iv) A method of preferentially allocating transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels (mapping type based priority setting method according to the fourth embodiment). ).

When the transmission power is preferentially allocated to one of the first and second uplink data channels and the priority setting information is not received, the first and second uplink data according to the predefined priority or the default priority. Transmit power may be allocated to one of the channels preferentially.

16 is a diagram illustrating a configuration of a base station 1600 according to another embodiment.

Referring to FIG. 16, a base station 1600 according to another embodiment includes a controller 1610, a transmitter 1620, and a receiver 1630.

The controller 1610 controls the overall operation of the base station 1600 according to the method for transmitting and receiving the uplink data channel in the next-generation wireless network required to carry out the present invention described above.

The transmitter 1620 and the receiver 1630 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

The base station 1600 transmits the first and second resource allocation information to the terminal for the first and second uplink data channels, respectively, 1620, and the first and second resource allocation information based on the first and second resource allocation information. When uplink data channels are to be transmitted at least partially overlapped in time, uplink data channel uplink is allocated to one of the first and second uplink data channels and the transmit power is adjusted to the other one. And a receiver 1630 for receiving the link data channel.

Adjusting the transmit power for the other one may be performed by first assigning transmit power to one of the first and second uplink data channels and allocating the remaining transmit power to the other or zeroing the transmit power to zero. It may be to drop the remaining uplink data channel transmission.

When the remaining transmit power is allocated to the other of the first and second uplink data channels or the transmit power is zero and the transmit power is zero, the remaining uplink data channel transmission is dropped. The remaining uplink data channel transmission can be performed by allocating the remaining transmit power only within the symbol overlapping the link data channels in time or after all symbols and all symbols after the overlapping symbol, or with the transmit power zero. You can drop it.

As described above, the priority setting method includes priority setting methods according to the first to fourth embodiments, for example, a time-duration-based priority setting method and an uplink grant reception status. Priority setting method, uplink grant reception timing based priority setting method, mapping type based priority setting method.

According to the time-duration based priority setting method according to the first embodiment, the shortest duration of the durations of the first and second uplink data channels among the first and second uplink data channels or Transmit power may be preferentially allocated to the uplink data channel of the longest duration.

In accordance with the uplink grant reception priority setting method according to the second embodiment, the transmitter 1620 transmits one of the first and second resource allocation information to the terminal through the first downlink control channel. The other one of the 2 resource allocation information may be transmitted to the terminal through one of higher layer signaling and higher layer signaling + second downlink control channel.

Transmit power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel among the first and second uplink data channels, or higher layer signaling and higher layer signaling + second Transmit power may be preferentially allocated to an uplink data channel corresponding to resource allocation information received through one of the downlink control channels.

The transmitter 1620 may transmit one of the first and second resource allocation information to the terminal through the first higher layer signaling and the other to the terminal through the second higher layer signaling + downlink control channel.

When the transmission power is preferentially allocated to one of the first and second uplink data channels, the transmission power is preferentially allocated to the uplink data channel corresponding to the resource allocation information received through the first upper layer signaling. The transmission power may be preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the second upper layer signaling + downlink control channel.

According to the uplink grant reception timing based priority setting method according to the third embodiment, transmit power is preferentially allocated to one of the first and second uplink data channels according to the reception timing of the first and second resource allocation information. Can be.

For example, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing among the first and second resource allocation information. On the contrary, the transmission power may be preferentially allocated to the uplink data channel corresponding to the resource allocation information having the latest reception timing.

According to the mapping type based priority setting method according to the fourth embodiment, transmit power may be preferentially allocated to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels. have.

Transmit power may be preferentially allocated to one of the first and second uplink data channels based on the priority setting information received through the higher layer signaling or the downlink control channel.

The priority setting information may indicate one of the following schemes.

i) A method of assigning transmit power preferentially to an uplink data channel having a shortest duration or a longest duration among time durations of the first and second uplink data channels (time duration according to Embodiment 1 -duration) based priority setting method),

ii) preferentially assign transmission power to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel, or receive it through one of higher layer signaling and higher layer signaling + second downlink control channel A method of preferentially allocating power to an uplink data channel corresponding to one resource allocation information (uplink grant receiving priority based on the second embodiment),

iii) a method of preferentially allocating transmit power to one of the first and second uplink data channels according to a reception timing of the first and second resource allocation information; (Uplink grant timing based priority setting method according to Embodiment 3),

iv) A method of preferentially allocating transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels (mapping type based priority setting method according to the fourth embodiment). ).

When the transmission power is preferentially allocated to one of the first and second uplink data channels and the priority setting information is not received, the first and second uplink data according to the predefined priority or the default priority. Transmit power may be allocated to one of the channels preferentially.

17 is a diagram illustrating a configuration of a user terminal 1700 according to another embodiment.

Referring to FIG. 17, a user terminal 1700 according to another embodiment includes a receiver 1710, a controller 1720, and a transmitter 1730.

The transmitter 1730 transmits uplink control information, data, and a message to a base station through a corresponding channel. The transmitter 1730 may transmit uplink data based on uplink data resource allocation information.

The receiver 1710 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 1720 controls the overall operation of the user terminal 1700 according to the method for transmitting and receiving the uplink data channel in the next-generation wireless network required to perform the above-described present invention.

The user terminal 1700 may receive a first and second resource allocation information for the first and second uplink data channels from the base station, respectively, and the receiver 1710 and the first and second resource allocation information based on the first and second resource allocation information. When the two uplink data channels are to be transmitted at least partially overlapping in time, the controller 1720 is configured to allocate the transmission power to one of the first and second uplink data channels and to adjust the transmission power to the other one. It includes.

The controller 1720 adjusts the transmission power of the other one by first assigning the transmission power to one of the first and second uplink data channels and assigning the remaining transmission power to the other or zeroing the transmission power. The remaining uplink data channel transmission can be dropped by zeroing the transmission power.

When the remaining transmit power is allocated to the other of the first and second uplink data channels or the transmit power is zero and the transmit power is zero, the controller 1720 drops the remaining uplink data channel transmissions. Allocate only the first and second uplink data channels in time or all symbols after the overlapping symbol, all remaining symbols for all symbols, or zero the transmit power with zero transmit power and the remaining transmit power to zero. The uplink data channel transmission may be dropped.

The priority setting method may include priority setting methods according to the first to fourth embodiments, for example, a time-duration-based priority setting method, an uplink grant reception priority-based priority setting method, An uplink grant reception timing based priority setting method and a mapping type based priority setting method may be provided.

According to the time-duration based priority setting method according to the first embodiment, when the control unit 1720 allocates transmission power to one of the first and second uplink data channels, The transmission power may be allocated to the uplink data channel having the shortest duration or the longest duration among the durations of the second uplink data channels.

As shown in FIG. 11, when a first PUSCH transmission allocated in a slot unit and a non-slot based second PUSCH transmission of 2 symbols are allocated, a second PUSCH transmission having a short transmission duration in a time-domain is allocated. Priority is given, and accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

As shown in FIG. 11, when the first PUSCH transmission allocated in the slot unit and the second PUSCH transmission based on the non-slot of 2 symbols are allocated, the UE preferentially provides the equation 1 or the new PUSCH for the second PUSCH. When the equation for the transmission power is defined, the PUSCH transmission power may be allocated according to the new equation, and when there is remaining transmission power, the remaining transmission power may be allocated for the first PUSCH transmission.

According to the uplink grant reception priority setting method according to the second embodiment, the receiving unit receives one of the first and second resource allocation information from the base station through the first downlink control channel, and the first and second resources. The other one of the allocation information may be received from the base station through one of higher layer signaling and higher layer signaling + second downlink control channel.

When the controller 1720 preferentially allocates transmission power to one of the first and second uplink data channels, the controller 1720 preferentially assigns the uplink data channel corresponding to the resource allocation information received through the first downlink control channel. Transmission power may be allocated, or power may be preferentially allocated to an uplink data channel corresponding to resource allocation information received through one of higher layer signaling and higher layer signaling + second downlink control channel.

The receiving unit 1710 may receive one of the first and second resource allocation information from the base station through the first upper layer signaling and the other from the base station through the second higher layer signaling + downlink control channel. .

When the controller 1720 preferentially allocates transmission power to one of the first and second uplink data channels, the control unit 1720 preferentially transmit power to an uplink data channel corresponding to the resource allocation information received through the first upper layer signaling. Transmit power may be allocated to the uplink data channel corresponding to the resource allocation information received through the second higher layer signaling + downlink control channel.

Referring to FIG. 12, when a collision occurs between uplink grant-based first PUSCH transmission and grant-free second PUSCH transmission in one UE, the UE may be configured to transmit a second PUSCH transmission that is grant-free PUSCH transmission. Priority can be given to the first PUSCH transmission, except for the second PUSCH.

As shown in FIG. 12, when uplink grant-based PUSCH transmission and grant-free based PUSCH transmission are allocated, the UE preferentially calculates Equation 1 or new PUSCH transmission power for the grant-free based second PUSCH. If the equation is defined, the PUSCH transmission power may be allocated according to the new equation, and if there is remaining transmission power, the remaining transmission power may be allocated for the uplink grant-based first PUSCH transmission.

In addition, in case of collision between grant-based PUSCH transmissions, priority may be defined according to a corresponding grant type. For example, grant based on type 1 configured PUSCH transmission may be preferred to grant based on type 2 grant PUSCH, or conversely, type 2 configured based on grant PUSCH transmission may be preferred to type 1 configured grant based PUSCH transmission. Can be. The specific PUSCH transmission method according to this may follow the above description.

According to the uplink grant reception timing based priority setting method according to the third embodiment, when the control unit 1720 allocates transmission power to one of the first and second uplink data channels preferentially, the first and second resources The transmission power may be preferentially allocated to one of the first and second uplink data channels according to the reception timing of the allocation information.

The controller 1720 may preferentially allocate transmit power to an uplink data channel corresponding to the resource allocation information having the latest reception timing among the first and second resource allocation information.

Referring to FIG. 13, when a collision occurs between a first PUSCH transmission and a second PUSCH transmission in one terminal, the terminal gives priority to a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH. Accordingly, the first PUSCH transmission except for the second PUSCH may be dropped.

As shown in FIG. 13, when a corresponding equation (1) or a new PUSCH transmission power is defined for a second PUSCH transmission recently receiving an uplink grant for the corresponding PUSCH, the UE corresponds to a new PUSCH according to the new equation. The transmit power may be allocated, and when there is remaining transmit power, the remaining transmit power may be allocated for the first PUSCH transmission.

According to the mapping type based priority setting method according to the fourth embodiment, when the control unit 1720 allocates transmission power to one of the first and second uplink data channels preferentially, the first and second uplink data may be used. The transmission power may be allocated to one of the first and second uplink data channels according to the mapping type of the channels.

When the controller 1720 preferentially allocates transmission power to one of the first and second uplink data channels, the controller 1720 based on the priority setting information received through the higher layer signaling or the downlink control channel. Transmit power may be allocated to one of the two uplink data channels preferentially.

The priority setting information may indicate one of the following schemes.

i) A method of assigning transmit power preferentially to an uplink data channel having a shortest duration or a longest duration among time durations of the first and second uplink data channels (time duration according to Embodiment 1 -duration) based priority setting method),

ii) preferentially assign transmission power to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel, or receive it through one of higher layer signaling and higher layer signaling + second downlink control channel A method of preferentially allocating power to an uplink data channel corresponding to one resource allocation information (uplink grant receiving priority based on the second embodiment),

iii) a method of preferentially allocating transmission power to one of the first and second uplink data channels according to the reception timing of the first and second resource allocation information (uplink grant timing based on the uplink grant according to the third embodiment) Way),

iv) A method of preferentially allocating transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels (mapping type based priority setting method according to the fourth embodiment). ).

When the control unit 1720 does not receive the priority setting information when allocating the transmission power to one of the first and second uplink data channels, the controller 1720 according to the predefined priority or the default priority For example, the transmission power may be allocated to one of the second uplink data channels first.

According to the embodiments described above, uplink data channels can be efficiently transmitted in various cases in which a plurality of uplink data channel transmissions simultaneously occur in one terminal in a next generation wireless network.

The above embodiments provide a priority-based PUSCH transmission power allocation method and a transmission operation of the terminal when a plurality of PUSCH transmissions occur simultaneously in one terminal, but the present invention is not limited thereto.

For example, the present invention includes a priority based PUSCH transmission power allocation method and a transmission operation of the terminal when a plurality of uplink transmissions occur simultaneously in one terminal. 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 APPLICATION

This patent application is filed with the Korean Patent Application No. 10-2018-0037387 filed in Korea on March 30, 2018 and Patent Application No. 10-2019-0035586 filed in Korea on March 28, 2019. Priority is claimed under section (a) (35 USC § 119 (a)), all of which is incorporated by reference in this patent 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 (20)

1. As a method for transmitting a UL data channel by the terminal,

   Receiving first resource allocation information for the first uplink data channel and second resource allocation information for the second uplink data channel from the base station, respectively; And

   When transmission of the first and second uplink data channels at least partially overlaps in time based on the first and second resource allocation information, transmission power is preferentially allocated to one of the first and second uplink channels. And adjusting the transmit power for the other one.
2. The method of claim 1,

   Adjusting the transmit power for the other one is to first allocate the transmit power to one of the first and second uplink data channels and to allocate the remaining transmit power to the other one or zero the transmit power to the other uplink data channel. How to drop a transmission.
3. The method of claim 1,

   When the remaining transmit power is allocated to the other of the first uplink data channel and the second uplink data channel, or the transmit power is zero and the transmit power is zero, the remaining uplink data channel transmission is dropped.

   Allocate only the symbols in the first and second uplink data channels in time or all symbols after the overlapping symbols, all symbols, or allocate the remaining transmission power to zero and transmit the transmission power to zero and the rest. A method of dropping uplink data channel transmissions.
4. The method of claim 1,

   When preferentially allocating transmit power to one of the first and second uplink data channels,

   And assigning transmit power preferentially to an uplink data channel of the shortest duration or the longest duration of the durations of the first and second uplink data channels.
5. The method of claim 1,

   Receiving each of the first and second resource allocation information from the base station,

   Receive one of the first and second resource allocation information from the base station through a first downlink control channel, and the other of the first, second resource allocation information is higher layer signaling and higher layer signaling + system Receive from the base station through one of two downlink control channels,

   When preferentially allocating transmit power to one of the first and second uplink data channels,

   The transmission power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel or received through one of higher layer signaling and higher layer signaling + second downlink control channel. A method of preferentially allocating transmit power to an uplink data channel corresponding to resource allocation information.
6. The method of claim 1,

   Receiving each of the first and second resource allocation information from the base station,

   Receiving one of the first and second resource allocation information from the base station through first higher layer signaling and the other from the base station through a second higher layer signaling + downlink control channel,

   When preferentially allocating transmit power to one of the first and second uplink data channels,

   Transmit power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first upper layer signaling, or an uplink corresponding to the resource allocation information received through the second upper layer signaling + downlink control channel. A method of assigning transmit power preferentially to link data channels.
7. The method of claim 1,

   When preferentially allocating transmit power to one of the first and second uplink data channels,

   And allocating transmit power to one of the first and second uplink data channels according to a reception timing of the first and second resource allocation information.
8. The method of claim 7, wherein

   The method of claim 1, wherein the transmission power is preferentially allocated to an uplink data channel corresponding to the resource allocation information having the latest reception timing among the first and second resource allocation information.
9. The method of claim 1,

   When preferentially allocating transmit power to one of the first and second uplink data channels,

   And assigning transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels.
10. The method of claim 1,

    When preferentially allocating transmit power to one of the first and second uplink data channels,

    A method of allocating transmit power to one of the first and second uplink data channels based on priority setting information received through higher layer signaling or downlink control channel.
11. The method of claim 10,

    The priority setting information may indicate one of the following schemes:

    i) a method of preferentially allocating transmit power to an uplink data channel having a shortest duration or a longest duration among time durations of the first and second uplink data channels;

    ii) preferentially allocating transmission power to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel, or through one of upper layer signaling and upper layer signaling + second downlink control channel A method of preferentially allocating power to an uplink data channel corresponding to the received resource allocation information;

    iii) a method of preferentially allocating transmit power to one of the first and second uplink data channels according to a reception timing of the first and second resource allocation information;

    iv) a method of preferentially allocating transmit power to one of the first and second uplink data channels according to the mapping type of the first and second uplink data channels.
12. The method of claim 10,

    When preferentially allocating transmit power to one of the first and second uplink data channels,

    If the priority setting information is not received, the transmission power is preferentially allocated to one of the first and second uplink data channels according to a predefined priority or default priority.
13. A terminal for transmitting an uplink data channel,

    A receiving unit for receiving first and second resource allocation information for the first and second uplink data channels, respectively, from a base station; And

    Based on the first and second resource allocation information, when the first and second uplink data channels are to be transmitted at least partially overlapping in time, the first and second uplink data channels are preferentially transmitted to one of the first and second uplink data channels. A terminal comprising a control unit for allocating power and adjusting the transmission power for the other.
14. The method of claim 13,

    The control unit adjusts the transmission power of the other one by first assigning transmission power to one of the first and second uplink data channels and allocating the remaining transmission power to the other or zeroing the transmission power to the other. A terminal for dropping uplink data channel transmission.
15. The method of claim 13,

    The control unit,

    When the remaining transmit power is allocated to the other of the first and second uplink data channels or the transmit power is zero and the transmit power is zero, the remaining uplink data channel transmission is dropped.

    Allocate only the first and second uplink data channels in time or all symbols after the overlapping symbol, and all remaining symbols for all symbols, or zero transmission power to transmit power to zero. A terminal for dropping the remaining uplink data channel transmission.
16. The method of claim 13,

    The control unit,

    When preferentially allocating transmit power to one of the first and second uplink data channels,

    And a terminal for allocating transmit power preferentially to an uplink data channel having a shortest duration or a longest duration among the durations of the first and second uplink data channels.
17. The method of claim 13,

    The receiving unit,

     Receives one of the first and second resource allocation information from a base station through a first downlink control channel, and receives another one of the first and second resource allocation information from higher layer signaling and higher layer signaling + second downlink. Received from the base station through one of the control channels,

    The control unit,

    When preferentially allocating transmit power to one of the first and second uplink data channels,

    The transmission power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first downlink control channel or received through one of higher layer signaling and higher layer signaling + second downlink control channel. A terminal preferentially allocates power to an uplink data channel corresponding to resource allocation information.
18. The method of claim 13,

    The receiving unit,

    Receiving one of the first and second resource allocation information from the base station through first higher layer signaling and the other from the base station through a second higher layer signaling + downlink control channel,

    The control unit,

    When preferentially allocating transmit power to one of the first and second uplink data channels,

    Transmit power is preferentially allocated to an uplink data channel corresponding to the resource allocation information received through the first upper layer signaling, or an uplink corresponding to the resource allocation information received through the second upper layer signaling + downlink control channel. Terminal for allocating transmit power preferentially to the link data channel.
19. The method of claim 13,

    The control unit,

    When the transmission power is preferentially allocated to one of the first and second uplink data channels, the reception timing of the first and second resource allocation information and the mapping type of the first and second uplink data channels are determined. And a terminal to allocate transmission power to one of the first and second uplink data channels first.
20. The base station receives the uplink data channel,

    Transmitting first and second resource allocation information to the terminal for the first and second uplink data channels, respectively; And

    When the first and second uplink data channels are to be transmitted at least partially overlapping in time based on the first and second resource allocation information, the first and second uplink data channels are preferentially transmitted to one of the first and second uplink data channels. Receiving an uplink data channel and an uplink data channel in which power is allocated and transmit power for the other is adjusted.

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