WO2019216612A1 - Procédé et appareil de commande de puissance de transmission en liaison montante par un terminal à des fins de double connectivité dans un système de communication sans fil - Google Patents

Procédé et appareil de commande de puissance de transmission en liaison montante par un terminal à des fins de double connectivité dans un système de communication sans fil Download PDF

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Publication number
WO2019216612A1
WO2019216612A1 PCT/KR2019/005401 KR2019005401W WO2019216612A1 WO 2019216612 A1 WO2019216612 A1 WO 2019216612A1 KR 2019005401 W KR2019005401 W KR 2019005401W WO 2019216612 A1 WO2019216612 A1 WO 2019216612A1
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WIPO (PCT)
Prior art keywords
transmission
terminal
base station
lte
uplink
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PCT/KR2019/005401
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English (en)
Korean (ko)
Inventor
최승훈
김영범
김태형
오진영
Original Assignee
삼성전자 주식회사
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Priority claimed from KR1020180133477A external-priority patent/KR20190129674A/ko
Priority claimed from KR1020180137298A external-priority patent/KR20190129676A/ko
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to US17/053,000 priority Critical patent/US11399346B2/en
Priority to EP19798865.2A priority patent/EP3780782B1/fr
Publication of WO2019216612A1 publication Critical patent/WO2019216612A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Definitions

  • the present invention relates to a transmission power control method and apparatus for uplink transmission in a wireless communication system.
  • a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE).
  • 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band).
  • mmWave ultra-high frequency
  • FD-MIMO massive array multiple input / output
  • FD-MIMO massive array multiple input / output
  • Array antenna, analog beam-forming, and large scale antenna techniques are discussed.
  • 5G communication systems have advanced small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation
  • cloud RAN cloud radio access network
  • ultra-dense network ultra-dense network
  • D2D Device to Device communication
  • wireless backhaul moving network
  • cooperative communication Coordinated Multi-Points (CoMP), and interference cancellation
  • Hybrid FSK and QAM Modulation FQAM
  • SWSC Slide Window Superposition Coding
  • ACM Advanced Coding Modulation
  • FBMC Fan Bank Multi Carrier
  • NOMA non orthogonal multiple access
  • SCMA sparse code multiple access
  • IoT Internet of Things
  • IoE Internet of Everything
  • M2M machine to machine
  • MTC Machine Type Communication
  • IT intelligent Internet technology services can be provided that collect and analyze data generated from connected objects to create new value in human life.
  • IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical services, etc. through convergence and complex of existing information technology (IT) technology and various industries. It can be applied to.
  • a terminal capable of dual access to LTE and NR may transmit and receive data for LTE and NR cells, respectively, wherein the uplink transmission power of the terminal is limited by the maximum power of the terminal.
  • one object of the present invention according to whether the LTE cell is a master cell group (MCG) or the NR cell is MCG, or the processing time of the uplink transmission of the terminal, if the uplink transmission occurs simultaneously in the LTE cell and the NR cell
  • MCG master cell group
  • a method and apparatus for controlling uplink transmit power such as reducing transmit power or dropping transmissions in a particular cell.
  • a wireless communication system for solving the above problems, dual connectivity with a first base station based on a first radio access technology and a second base station based on a second radio access technology is established.
  • the terminal method Receiving a downlink signal from the first base station, the transmission timing of the first uplink signal corresponding to the downlink signal is the transmission of the second uplink signal to the second base station Checking whether the timing overlaps, and when the transmission timing of the first uplink signal and the transmission timing of the second uplink signal overlap, the first transmission power and the second uplink transmission for the first uplink transmission are performed.
  • the method may include controlling the second transmit power based on a processing time for transmitting the first uplink signal.
  • a first base station method comprising: transmitting a downlink signal to the terminal and receiving a first uplink signal corresponding to the downlink signal from the terminal based on a first transmission power; The second transmission power for the transmission of the second uplink signal from the terminal to the second base station, the transmission timing of the first uplink signal overlaps with the transmission timing of the second uplink signal, the first If the sum of the transmit power and the second transmit power exceeds the maximum transmit power of the terminal, the first uplink signal processing time of the terminal is based on the It may be controlled by the horse.
  • a terminal for performing dual connectivity with a first base station based on a first radio access technology and a second base station based on a second radio access technology The transceiver is controlled to receive a downlink signal from the transceiver and the first base station, and the transmission timing of the first uplink signal corresponding to the downlink signal is transmitted to the second base station. Check whether the timing overlaps, and when the transmission timing of the first uplink signal and the transmission timing of the second uplink signal overlap, the first transmission power and the second uplink signal for the transmission of the first uplink signal.
  • Determine whether the sum of the second transmission power for the transmission exceeds the maximum transmission power of the terminal, and the first transmission power and the second transmission power If it exceeds the maximum transmit power of the terminal, on the basis of processing (processing) time for the first transmission of the uplink signal may be a control unit for controlling the second transmission power.
  • the transceiver unit In the first base station, the transceiver unit to transmit a downlink signal to the transceiver and the terminal, and to receive a first uplink signal corresponding to the downlink signal from the terminal, based on a first transmission power And a control unit for controlling the second transmission power for the transmission of the second uplink signal from the terminal to the second base station, wherein the transmission timing of the first uplink signal is the transmission timing of the second uplink signal. If the sum of the first transmit power and the second transmit power exceeds the maximum transmit power of the terminal, the first uplink signal processing (p) of the terminal; rocessing) may be controlled by the terminal based on the time.
  • the first uplink signal processing (p) of the terminal; rocessing may be controlled by the terminal based on the time.
  • the present invention when the terminal is supported dual connectivity is set up dual connectivity from the LTE base station and the NR base station, in consideration of whether the MCG LTE or NR cell and the upstream processing time of the terminal Even if uplink transmission occurs simultaneously in the LTE cell and the NR cell, uplink transmission can be performed by controlling the transmit power within the maximum transmit power value of the UE.
  • FIG. 1 illustrates a basic structure of a time-frequency domain in an LTE system.
  • FIG. 2 is a diagram illustrating an example in which 5G services are multiplexed and transmitted in one system.
  • FIG. 3 is a diagram illustrating an embodiment of a communication system to which the present invention is applied.
  • FIG. 4 is a diagram illustrating a method of controlling power of uplink transmission according to Embodiments 1 and 2 of the present invention.
  • FIG. 5 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiments 3 and 4 of the present invention.
  • FIG. 6 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiments 5 and 6 of the present invention.
  • FIG. 7 is a diagram illustrating a method of controlling power of uplink transmission according to Embodiment 7 of the present invention.
  • Embodiment 8 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiment 8 of the present invention.
  • Embodiment 9 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiment 9 of the present invention.
  • FIG. 10 is a diagram illustrating a base station and a terminal procedure according to embodiments of the present invention.
  • FIG. 11 illustrates a base station apparatus according to embodiments of the present invention.
  • FIG. 12 is a diagram illustrating a terminal device according to embodiments of the present invention.
  • each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s).
  • Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).
  • each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s).
  • logical function e.g., a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s).
  • the functions noted in the blocks may occur out of order.
  • the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.
  • ' ⁇ part' used in the present embodiment refers to software or a hardware component such as an FPGA or an ASIC, and ' ⁇ part' plays certain roles.
  • ' ⁇ ' is not meant to be limited to software or hardware.
  • ' ⁇ Portion' may be configured to be in an addressable storage medium or may be configured to play one or more processors.
  • ' ⁇ ' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.
  • the functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'.
  • the components and ' ⁇ ' may be implemented to play one or more CPUs in the device or secure multimedia card.
  • an OFDM-based wireless communication system in particular the 3GPP EUTRA standard will be the main target, but the main subject of the present invention is another communication system having a similar technical background and channel form.
  • the main subject of the present invention is another communication system having a similar technical background and channel form.
  • a 5G communication system or a pre-5G communication system is called a Beyond 4G network communication system or a post LTE system.
  • 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band).
  • mmWave ultra-high frequency
  • FD-MIMO massive array multiple input / output
  • FD-MIMO massive array multiple input / output
  • FD-MIMO FD-MIMO
  • an advanced small cell in order to improve the network of the system, in the 5G communication system, an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network ), Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development, etc.
  • cloud RAN cloud radio access network
  • D2D Device to Device communication
  • CoMP Coordinated Multi-Points
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC Slide Window Superposition Coding
  • ACM Advanced Coding Modulation
  • FBMC Fan Bank Multi Carrier
  • NOMA Non-orthogonal multiple access and sparse code multiple access are being developed.
  • IoT Internet of Things
  • IoE Internet of Everything
  • M2M machine to machine
  • MTC Machine Type Communication
  • IT intelligent Internet technology services can be provided that collect and analyze data generated from connected objects to create new value in human life.
  • IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical services, etc. through convergence and complex of existing information technology (IT) technology and various industries. It can be applied to.
  • the present invention relates to a wireless communication system, and more particularly, different wireless communication systems coexist at one carrier frequency or multiple carrier frequencies, and a terminal capable of transmitting and receiving data in at least one communication system among different communication systems.
  • the present invention relates to a method and an apparatus for transmitting and receiving data with each communication system.
  • mobile communication systems have been developed to provide voice services while guaranteeing user activity.
  • mobile communication systems are gradually expanding to not only voice but also data services, and have now evolved to provide high-speed data services.
  • a shortage of resources and users demand faster services, and thus, a more advanced mobile communication system is required.
  • LTE Long Term Evolution
  • 3GPP The 3rd Generation Partnership Project
  • LTE is a technology that implements high-speed packet-based communication with a transmission rate of up to 100 Mbps.
  • various methods are discussed.
  • the network structure can be simplified to reduce the number of nodes located on the communication path, or the wireless protocols can be as close to the wireless channel as possible.
  • the LTE system employs a hybrid automatic repeat request (HARQ) scheme in which the data is retransmitted in the physical layer when a decoding failure occurs in the initial transmission.
  • HARQ hybrid automatic repeat request
  • the receiver when the receiver does not correctly decode the data, the receiver transmits NACK (Negative Acknowledgement) indicating the decoding failure to the transmitter so that the transmitter can retransmit the corresponding data in the physical layer.
  • NACK Negative Acknowledgement
  • the receiver combines the data retransmitted by the transmitter with the previously decoded data to improve the data reception performance.
  • the transmitter may transmit an acknowledgment (ACK) indicating the decoding success to the transmitter so that the transmitter may transmit new data.
  • ACK acknowledgment
  • FIG. 1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource region in which the data or control channel is transmitted in downlink in an LTE system.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • the minimum transmission unit in the time domain is an OFDM symbol, in which Nsymb (102) OFDM symbols are gathered to form one slot 106, and two slots are gathered to form one subframe 105.
  • the length of the slot is 0.5ms and the length of the subframe is 1.0ms.
  • the radio frame 114 is a time domain unit consisting of 10 subframes.
  • the minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is composed of a total of NBW 104 subcarriers.
  • the basic unit of a resource in the time-frequency domain may be represented by an OFDM symbol index and a subcarrier index as a resource element (RE).
  • the resource block 108 (Resource Block; RB or PRB) is defined as Nsymb 102 consecutive OFDM symbols in the time domain and NRB 110 consecutive subcarriers in the frequency domain.
  • one RB 108 is composed of Nsymb x NRB REs 112.
  • the minimum transmission unit of data is the RB unit.
  • the data rate increases in proportion to the number of RBs scheduled for the UE.
  • the LTE system defines and operates six transmission bandwidths. In the case of a frequency division duplex (FDD) system in which downlink and uplink are divided into frequencies, the downlink transmission bandwidth and the uplink transmission bandwidth may be different.
  • the channel bandwidth represents a radio frequency (RF) bandwidth corresponding to the system transmission bandwidth.
  • RF radio frequency
  • Table 1 shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system.
  • an LTE system with a 10 MHz channel bandwidth consists of 50 RBs in transmission bandwidth.
  • the downlink control information is transmitted within the first N OFDM symbols in the subframe.
  • N ⁇ 1, 2, 3 ⁇ . Therefore, the N value varies in each subframe according to the amount of control information to be transmitted in the current subframe.
  • the control information includes a control channel transmission interval indicator indicating how many control information is transmitted over the OFDM symbol, scheduling information for downlink data or uplink data, HARQ ACK / NACK signal, and the like.
  • DCI downlink control information
  • An uplink (UL) refers to a radio link through which a terminal transmits data or a control signal to a base station
  • a downlink (DL) refers to a radio link through which a base station transmits data or a control signal to a terminal.
  • DCI defines various formats to determine whether scheduling information (UL (uplink) grant) for uplink data or scheduling information (DL (downlink) grant) for downlink data and whether compact DCI having a small size of control information.
  • the DCI format is determined according to whether or not it is applied, whether to use spatial multiplexing using multiple antennas, or whether the DCI for power control is applied.
  • DCI format 1 which is scheduling control information (DL grant) for downlink data is configured to include at least the following control information.
  • Resource allocation type 0/1 flag Notifies whether the resource allocation method is type 0 or type 1.
  • Type 0 uses the bitmap method to allocate resources in resource block group (RBG) units.
  • a basic unit of scheduling is a resource block (RB) represented by time and frequency domain resources, and the RBG is composed of a plurality of RBs to become a basic unit of scheduling in a type 0 scheme.
  • Type 1 allows allocating a specific RB within the RBG.
  • Resource block assignment Notifies the RB allocated for data transmission.
  • the resource to be expressed is determined by the system bandwidth and the resource allocation method.
  • Modulation and coding scheme Notifies the modulation scheme used for data transmission and the size of the transport block that is the data to be transmitted.
  • HARQ process number Notifies the process number of HARQ.
  • New data indicator notifies whether HARQ initial transmission or retransmission.
  • Redundancy version Notifies the redundant version of the HARQ.
  • TPC Transmit Power Control
  • PUCCH Physical Uplink Control CHannel
  • the DCI is transmitted through a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH), which is a downlink physical control channel through channel coding and modulation.
  • PDCH physical downlink control channel
  • EPDCCH enhanced PDCCH
  • the DCI is channel-coded independently for each UE, and then configured and transmitted with each independent PDCCH.
  • the PDCCH is mapped and transmitted during the control channel transmission period.
  • the frequency domain mapping position of the PDCCH is determined by the identifier (ID) of each terminal and spread over the entire system transmission band.
  • the downlink data is transmitted through a physical downlink shared channel (PDSCH) which is a physical channel for downlink data transmission.
  • PDSCH is transmitted after the control channel transmission interval, and scheduling information such as specific mapping positions and modulation schemes in the frequency domain is informed by the DCI transmitted through the PDCCH.
  • the base station notifies the UE of a modulation scheme applied to a PDSCH to be transmitted and a transport block size (TBS) of data to be transmitted through an MCS configured of 5 bits among control information constituting the DCI.
  • TBS corresponds to a size before channel coding for error correction is applied to data (transport block, TB) that the base station intends to transmit.
  • Quadrature Phase Shift Keying QPSK
  • Quadrature Amplitude Modulation (16QAM) Quadrature Amplitude Modulation
  • 64QAM 64QAM.
  • Each modulation order (Qm) corresponds to 2, 4, and 6. That is, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, and 6 bits per symbol for 64QAM modulation.
  • bandwidth extension technology has been adopted to support higher data throughput compared to LTE Rel-8.
  • This technique called bandwidth extension or carrier aggregation (CA)
  • CA bandwidth extension or carrier aggregation
  • Each of the bands is called a component carrier (CC)
  • the LTE Rel-8 terminal is defined to have one component carrier for each of downlink and uplink.
  • the downlink component carrier and the uplink component carrier connected to the SIB-2 are collectively called a cell.
  • the SIB-2 connection relationship between the downlink component and the uplink component is transmitted as a system signal or a higher signal.
  • the terminal supporting the CA may receive downlink data through a plurality of serving cells and transmit uplink data.
  • a base station when a base station is difficult to send a physical downlink control channel (PDCCH) to a specific UE from a specific serving cell, another serving cell transmits the PDCCH and the corresponding PDCCH is a physical downlink shared channel (PDSCH) of another serving cell or
  • a carrier indicator field may be set to the UE.
  • the CIF may be set to a terminal supporting the CA.
  • the CIF is determined to indicate another serving cell by adding 3 bits to the PDCCH information in a specific serving cell.
  • the CIF is included only when the CIF is set as an upper signal to perform cross carrier scheduling.
  • the upper signal is not set to cross carrier scheduling or the upper signal is set to self scheduling, CIF is not included and cross carrier scheduling is not performed at this time.
  • the CIF is included in downlink allocation information (DL assignment)
  • the CIF indicates a serving cell to which a PDSCH scheduled by DL assignment is to be transmitted
  • the CIF is included in UL resource allocation information (UL grant).
  • the CIF is defined to indicate the serving cell to which the PUSCH scheduled by the UL grant is to be transmitted.
  • carrier aggregation which is a bandwidth extension technology
  • a plurality of serving cells may be configured in the terminal.
  • the terminal transmits channel information about the plurality of serving cells periodically or aperiodically to the base station for data scheduling of the base station.
  • the base station schedules and transmits data for each carrier, and the terminal transmits A / N feedback for the data transmitted for each carrier.
  • it is designed to transmit A / N feedback of maximum 21 bits, and when A / N feedback and channel information overlap in one subframe, it is designed to transmit A / N feedback and discard channel information.
  • up to 22 bits of A / N feedback and one cell channel information are transmitted in PUCCH format 3 from PUCCH format 3 by multiplexing channel information of one cell with A / N feedback. It was.
  • LTE Rel-13 a maximum of 32 serving cell configuration scenarios are assumed.
  • the concept of extending the number of serving cells to 32 by using a band in an unlicensed band as well as a licensed band is completed.
  • the LTE service has been provided in an unlicensed band such as the 5 GHz band, which is called LAA (Licensed Assisted Access).
  • LAA Licensed Assisted Access
  • the LAA applied Carrier aggregation technology in LTE to support the operation of the LTE cell, which is a licensed band, as the P-cell, and the LAA cell, which is the unlicensed band, as the S-cell.
  • LTE refers to including all of LTE evolution technology, such as LTE-A, LAA.
  • a communication system after LTE i.e., a fifth generation wireless cellular communication system (hereinafter referred to as 5G or NR)
  • 5G or NR a fifth generation wireless cellular communication system
  • 5G or NR should be able to freely reflect various requirements such as users and service providers. Services that meet the requirements can be supported.
  • 5G is referred to as increased mobile broadband communication (eMBB: Enhanced Mobile BroadBand, hereinafter referred to as eMBB), Massive Machine Type Communication (mMTC: referred to herein as mMTC), Various 5G-oriented services such as ultra reliable low delay communication (URLLC: Ultra Reliable and Low Latency Communications, hereinafter referred to as URLLC) in terms of terminal maximum transmission speed of 20Gbps, terminal maximum speed of 500km / h, and maximum delay time of 0.5ms
  • URLLC Ultra Reliable and Low Latency Communications
  • the terminal access density may be defined as a technology for satisfying the requirements selected for each 5G-oriented services among requirements such as 1,000,000 terminals / km 2.
  • mMTC is being considered to support application services such as the Internet of Thing (IoT) in 5G.
  • IoT Internet of Thing
  • the mMTC needs a requirement for supporting large terminal access in a cell, improving terminal coverage, improved battery time, and reducing terminal cost.
  • the IoT is attached to various sensors and various devices to provide a communication function, it must be able to support a large number of terminals (eg, 1,000,000 terminals / km 2) in a cell.
  • mMTC is likely to be located in a shadow area such as the basement of a building or an area not covered by a cell, and thus requires more coverage than the coverage provided by an eMBB.
  • the mMTC is likely to be composed of a low cost terminal, and very long battery life time is required because it is difficult to frequently change the battery of the terminal.
  • URLLC Ultra-low latency and ultra-reliability.
  • URLLC must satisfy a maximum latency of less than 0.5 ms, while simultaneously providing a packet error rate of 10-5 or less. Accordingly, a transmission time interval (TTI) smaller than a 5G service such as eMBB is required for URLLC, and a design that needs to allocate a wide resource in a frequency band is required.
  • TTI transmission time interval
  • the services considered in the above-mentioned fifth generation wireless cellular communication system should be provided as a framework. That is, for efficient resource management and control, it is desirable that each service is integrated and controlled and transmitted as one system rather than operated independently.
  • FIG. 2 is a diagram illustrating an example in which services considered in 5G are transmitted to one system.
  • the frequency-time resource 201 used by 5G in FIG. 2 may consist of a frequency axis 202 and a time axis 203. 2 illustrates that 5G operates eMBB 205, mMTC 206 and URLLC 207 in one framework.
  • eMBMS enhanced mobile broadcast / multicast service
  • Services considered in 5G are time-division multiplexing (TDM) or frequency within one system frequency bandwidth operating at 5G. It may be multiplexed and transmitted through frequency division multiplexing (FDM), and spatial division multiplexing may also be considered.
  • TDM time-division multiplexing
  • FDM frequency division multiplexing
  • eMBB 205 it is desirable to occupy the maximum frequency bandwidth at a certain arbitrary time in order to provide the increased data transmission rate described above. Accordingly, in the case of the eMBB 205 service, it is preferable to transmit TDM in another service and system transmission bandwidth 201, but it is also desirable to transmit FDM in other services and system transmission bandwidth according to the needs of other services. .
  • the mMTC 206 unlike other services, an increased transmission interval is required to secure wide coverage, and coverage can be secured by repeatedly transmitting the same packet within the transmission interval. At the same time, there is a limit on the transmission bandwidth that the terminal can receive in order to reduce the complexity of the terminal and the terminal price. Given this requirement, it is desirable for the mMTC 206 to be transmitted in FDM with other services within a 5G transmission system bandwidth 201.
  • URLLC 207 preferably has a short Transmit Time Interval (TTI) when compared to other services to meet the ultra-delay requirements required by the service. At the same time, it is desirable to have a wide bandwidth on the frequency side because it must have a low coding rate in order to satisfy the super reliability requirements. Given this requirement of URLLC 207, URLLC 207 is preferably TDM with other services within 5G of transmission system bandwidth 201.
  • TTI Transmit Time Interval
  • Each of the above-described services may have different transmission / reception schemes and transmission / reception parameters in order to satisfy requirements required by each service.
  • each service can have a different numerology based on each service requirement. Numerology is a cyclic prefix (CP) length and subcarrier spacing in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA). spacing), OFDM symbol length, transmission interval length (TTI), and the like.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDMA Orthogonal Frequency Division Multiple Access
  • spacing OFDM symbol length
  • TTI transmission interval length
  • the eMBMS 208 may have a longer CP length than other services. Since eMBMS transmits broadcast-based higher traffic, all cells can transmit the same data.
  • a shorter OFDM symbol length may be required as a smaller TTI is required than other services, and at the same time, a wider subcarrier interval may be required.
  • one TTI may be defined as one slot, and may include 14 OFDM symbols or 7 OFDM symbols. Therefore, in the case of subcarrier spacing of 15KHz, one slot has a length of 1ms or 0.5ms.
  • one TTI can be defined as one mini-slot or sub-slot for emergency transmission and transmission to unlicensed band, and one mini-slot is from 1 (total OFDM of slots).
  • Symbol number) ⁇ 1 may have the number of OFDM symbols. For example, when the length of one slot is 14 OFDM symbols, the length of the mini slot may be determined from 1 to 13 OFDM symbols.
  • the length, format, and repetition type of the slot or minislot may be defined by the standard or transmitted by higher level signals, system information, or physical signals, and may be received by the terminal.
  • a slot instead of a mini slot or a sub slot, a slot may be determined from 1 to 14 OFDM symbols, and the length of the slot may be transmitted by an upper signal or system information and may be received by the terminal.
  • Slots or mini-slots may be defined to have various transmission formats, and may be classified into the following formats.
  • Downlink-only slot (DL only slot or full DL slot): Downlink-only slot consists of only a downlink period, only downlink transmission is supported.
  • a DL centric slot is composed of a down period, a GP (or a flexible symbol), and an up period, and the number of OFDM symbols in the down period is larger than the number of OFDM symbols in the up period.
  • the up-centric slot is composed of a downlink section, a GP (or flexible symbol), and an uplink section, and the number of OFDM symbols in the downlink section is smaller than the number of OFDM symbols in the uplink section.
  • the uplink only slot consists of an uplink only, only uplink transmission is supported.
  • the mini-slot may be classified in the same classification method. That is, it may be classified into a downlink only mini slot, a down center mini slot, an up center mini slot, an uplink dedicated mini slot, and the like.
  • the flexible symbol may be used as a guard symbol for transmission / reception switching and may also be used for channel estimation purposes.
  • LTE and 5G system will be the main target, but the main subject of the present invention greatly extends the scope of the present invention to other communication systems having a similar technical background and channel form. Applicable in a few variations without departing from the scope, which will be possible in the judgment of those skilled in the art.
  • FIG. 3 is a diagram illustrating an embodiment of a communication system to which the present invention is applied.
  • the drawings illustrate a form in which the 5G system is operated, and the methods proposed in the present invention can be applied to the system of FIG. 3.
  • FIG. 3 is a diagram illustrating an example of an integrated system configuration combining a base station in charge of the new radio access technology and an LTE / LTE-A base station.
  • relatively small coverage base stations 303, 305, 307 of coverage 304, 306, 308 may be disposed within coverage 302 of macro base station 301.
  • the macro base station 301 is capable of transmitting signals at a relatively higher transmission power than the small base stations 303, 305, and 307, so that the coverage 302 of the macro base station 301 is the small base stations 303, 305, and 307.
  • the macro base station represents an LTE / LTE-A system operating in a relatively low frequency band
  • the small base stations 303, 305, and 307 represent a new radio access technology (NR or 5G) operating in the relatively high frequency band. ) Is applied to the system.
  • NR or 5G new radio access technology
  • the macro base station 301 and the small base station 303, 305, 307 are interconnected, and there may be a certain amount of backhaul delay depending on the connection state. Therefore, it may not be desirable to exchange information that is sensitive to transmission delays between the macro base station 301 and the small base station 303, 305, 307.
  • FIG. 3 illustrates carrier combining between the macro base station 301 and the small base stations 303, 305, and 307.
  • the present invention is not limited thereto, and the present invention is not limited thereto. Applicable for For example, according to the exemplary embodiment, the present invention may be applicable to both carrier combinations between macro base stations and macro base stations located at different locations, or carrier combinations between small base stations and small base stations located at different locations.
  • the number of carriers combined is not limited.
  • the macro base station 301 may use the frequency f1 for downlink signal transmission, and the small base stations 303, 305, and 307 may use the frequency f2 for downlink signal transmission.
  • the macro base station 301 may transmit data or control information to the predetermined terminal 309 through the frequency f1
  • the small base stations 303, 305, and 307 may transmit data or control information through the frequency f2.
  • a base station adopting a new radio access technology capable of supporting ultra-wideband in a high frequency band provides an ultra high speed data service and an ultra low delay service, and simultaneously adopts LTE / LTE-A technology in a relatively low frequency band.
  • the base station to be applied may support the mobility of a stable terminal.
  • the configuration illustrated in FIG. 3 may be similarly applied to uplink carrier coupling as well as downlink carrier coupling.
  • the terminal 309 may transmit data or control information to the macro base station 301 through the frequency f1 'for uplink signal transmission.
  • the terminal 309 may transmit data or control information to the small base stations 303, 305, and 307 through a frequency f 2 ′ for uplink signal transmission.
  • the f1 ' may correspond to the f1
  • the f2' may correspond to the f2.
  • the uplink signal transmission of the terminal may be performed at different times or simultaneously with the macro base station and the small base station. In any case, due to the physical constraints of the power amplifier elements of the terminal and the propagation restrictions on the terminal transmission power, the sum of the uplink transmission powers of the terminal at any moment should be kept within a predetermined threshold.
  • the operation of the terminal 309 that connects to the macro base station 301 and the small base stations 303, 305, and 307 to perform communication is referred to as dual connectivity (DC).
  • DC dual connectivity
  • the upper level signal (system or radio resource control (RRC)) is used for setting information for data transmission and reception for the macro base station. Signal).
  • RRC radio resource control
  • configuration information for data transmission and reception for the small base station 303, 304, 305 operating as an NR system is received from an upper signal (system or RRC signal) of the macro base station 301, and the small base station 303, 304, By performing random access to 305, the macro base station 301 and the small base station (303, 304, 305) is a dual connection state that can be transmitted and received data.
  • the macro base station 301 operating in the LTE / LTE-A system is referred to as a master cell group (MCG), and the small base stations 303, 304, and 305 operating in an NR system are referred to as a secondary cell group (SCG).
  • MCG master cell group
  • SCG secondary cell group
  • E-UTRA evolved-universal mobile communications system
  • the UE uses the evolved-universal mobile communications system (UMTS) terrestrial radio access (E-UTRA) and the MCG using the radio access (or LTE / LTE-A) and the SCG using the NR radio access. It can also be expressed as. Or it may be expressed that the terminal is set to EN-DC (E-UTRA NR Dual Connectivity).
  • the terminal receives configuration information for data transmission and reception for the small base station from an upper signal (system or RRC signal). . Thereafter, the configuration information for data transmission and reception for the macro base station 301 operating in the LTE / LTE-A system is received from an upper signal (system or RRC signal) of the small base station 303, 304, 305 and the macro base station ( By performing random access to 301, data can be transmitted and received from the small base stations 303, 304, and 305 and the macro base station 301.
  • system or RRC signal system or RRC signal
  • the small base stations 303, 304, and 305 operating in the NR system are referred to as MCG, and the macro base station 301 operating in the LTE system is referred to as SCG.
  • MCG the small base stations 303, 304, and 305 operating in the NR system
  • SCG the macro base station 301 operating in the LTE system
  • the terminal is in the dual access state as the terminal is set to MCG using NR radio access and SCG using E-UTRA radio access (or LTE / LTE-A).
  • E-UTRA radio access or LTE / LTE-A
  • NE-DC NR E-UTRA Dual Connectivity
  • the present invention proposes another embodiment according to whether LTE cells using E-UTRA are MCG or NR cells using NR.
  • the reason is that when the terminal is in a dual access state, importance should be given to uplink transmission to the MCG rather than uplink transmission to the SCG.
  • timing for transmitting uplink transmission to a cell using NR for example, PDCCH to PUSCH transmission timing or PDCCH to PUCCH transmission timing may be indicated differently by the higher signal configuration and the indication from the PDCCH. Since the timing for transmitting the transmission, for example, the PDCCH to PUSCH transmission timing or the PDCCH to PUCCH transmission timing is fixed, embodiments of the present invention are proposed in consideration of these conditions.
  • Embodiments 1 and 2 are diagram illustrating a method of controlling power of uplink transmission according to Embodiments 1 and 2 of the present invention.
  • Embodiments 1 and 2 may be applied when the terminal is set to EN-DC (E-UTRA NR Dual Connectivity).
  • the UE transmits P_LTE 402, which is the maximum transmission power for uplink transmission in MCG, P_NR 403, which is the maximum transmission power for uplink transmission in SCG, and maximum in EN-DC.
  • P_total 401 which is the transmission power, is set.
  • the first embodiment provides a case in which the UE has a capability for dynamic transmission power distribution.
  • Embodiment 1 if the UE has the capability to perform dynamic transmission power distribution, the UE may have subframe i 404 for LTE uplink transmission and slot k 406 or k + for NR uplink transmission. When two 407 overlap, the sum of P_LTE 402 and P_NR 403 exceeds P_total 401. In this case, the UE may attach importance to the MCG using E-UTRA radio access (or LTE / LTE-A), and thus may lower transmission power of the SCG using NR. Accordingly, the transmission power for the NR transmission can be reduced (408 or 409) so that the sum of the P_LTE 402 and the P_NR 403 enters the P_total 401.
  • E-UTRA radio access or LTE / LTE-A
  • the terminal when the terminal has a capability for dynamic transmission power distribution, the terminal transmits the capability signal for the dynamic transmission power distribution to the LTE base station or the NR base station in advance.
  • the second embodiment provides a case in which the terminal does not have a capability for dynamic transmission power distribution. .
  • Embodiment 2 if the terminal does not have a capability to perform dynamic transmission power distribution and thus the capability signal is not transmitted to the base station, the terminal is to determine in which subframes LTE uplink transmission is performed
  • the configuration information is received from the LTE or NR base station via a system or higher level signal.
  • the configuration information may be time division duplex (TDD) configuration information indicating an up-down subframe period, and the configuration information may be received and applied to the LTE cell regardless of whether the LTE cell is TDD or FDD.
  • TDD time division duplex
  • the UE determines that LTE uplink transmission is performed only in a subframe indicated by an uplink subframe, and does not perform NR uplink transmission in slots capable of NR transmission overlapping with the uplink subframe 405. 410. That is, even if an NR base station configures or schedules NR uplink transmission in slots overlapping with the uplink subframe 405, the UE may not perform the NR transmission.
  • FIG. 5 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiments 3 and 4 of the present invention.
  • Embodiments 3 and 4 may be applied when the terminal is set to NR E-UTRA Dual Connectivity (NE-DC).
  • NE-DC NR E-UTRA Dual Connectivity
  • the UE transmits P_LTE 502, which is the maximum transmission power for uplink transmission in SCG, P_NR 503, which is the maximum transmission power for uplink transmission in MCG, and NE-DC according to an upper signal.
  • P_total 501 is set.
  • the third embodiment provides a case in which the UE does not have a capability for dynamic transmission power distribution. .
  • Embodiment 3 if the terminal does not have a capability for dynamic transmission power distribution and thus fails to transmit the capability signal to the base station, the terminal configures in which subframes LTE uplink transmission is performed Information is received from the LTE or NR base station via a system or higher signal.
  • the configuration information may be TDD configuration information indicating a subframe interval up and down, and the configuration information may be received and applied to the LTE cell regardless of whether the LTE cell is TDD or FDD.
  • the UE may perform an operation different from the second embodiment in which the LTE uplink transmission is always performed in the LTE uplink subframe.
  • the UE when the UE is configured as NE-DC, the UE must first perform NR uplink transmission, which is MCG. Accordingly, even when the UE determines that the LTE uplink transmission is performed in the subframe indicated by the uplink subframe through the reception of the configuration information, the NR uplink instead of the uplink LTE transmission in slots capable of NR transmission overlapping with the uplink subframe 504. Provides a way to perform the transmission.
  • the UE may receive a PDCCH indicating NR uplink transmission.
  • the start symbol that is, subframe i (504) that should transmit the LTE uplink transmission is a value 511 plus the NE-DC processing capability 510 configured to the UE from the last symbol 509 of the PDCCH indicating NR uplink transmission.
  • LTE uplink transmission is dropped before the start symbol).
  • the NE-DC processing capability 510 configured for the UE may be a symbol number N1 corresponding to the time taken for PDSCH reception for the PDSCH processing capability if the UE receives the PDCCH for scheduling the PDSCH, and has a constant X. It may also be N1 + X.
  • the NE-DC processing capability 510 configured for the UE may be a symbol number N2 corresponding to the time required for preparation of the PUSCH for the PUSCH processing capability, if the UE receives the PDCCH for scheduling the PUSCH. It may also be N2 + Y.
  • the NE-DC processing capability 510 is defined as a value defined as the number of N symbols from the last symbol after receiving the PDCCH. You may.
  • the number of N symbols may be determined differently according to the subcarrier spacing of the LTE cell or the NR cell. For example, it can be determined as 13 for 15KHz, 15 for 30KHz, 22 for 60KHz, and 25 for 120KHz. Or, conservatively determine, by setting the NE-DC processing capability 510 to a maximum value of N1 or N1 + X, N2 or N2 + Y, N, and whether the terminal drops the LTE uplink transmission using the set value. It can be determined. Before the base station sets the NE-DC processing capability 510 as an upper signal, the terminal transmits the PDSCH processing capability related information or the PUSCH processing capability related information to the base station, and the base station receives the received information from the terminal. In consideration of the processing capability related information of the terminal, the appropriate N1 or N1 + X, N2 or N2 + Y, N value is set to the upper signal, the terminal may receive the configuration.
  • the fourth embodiment provides a case in which the UE does not have a capability for dynamic transmission power distribution.
  • Embodiment 4 if the terminal does not have a capability for dynamic transmission power distribution and thus fails to transmit the capability signal to the base station, the terminal configures in which subframes LTE uplink transmission is performed Information is received from the LTE or NR base station via a system or higher signal.
  • the configuration information may be TDD configuration information indicating a subframe interval up and down, and the configuration information may be received and applied to the LTE cell regardless of whether the LTE cell is TDD or FDD.
  • the UE may perform an operation different from the second embodiment in which the LTE uplink transmission is always performed in the LTE uplink subframe.
  • the UE when the UE is configured as NE-DC, the UE must first perform NR uplink transmission, which is MCG. Accordingly, even when the UE determines that the uplink transmission is performed in the subframe indicated by the uplink subframe through the reception of the configuration information, the NR uplink instead of the uplink LTE transmission in slots capable of NR transmission overlapping with the uplink subframe 505. Provides a way to perform the transmission.
  • the UE may receive a PDCCH indicating NR uplink transmission while performing LTE uplink transmission in the subframe 505. At this time, the UE drops the existing LTE transmission (512), and performs NR uplink transmission by the PDCCH indicating NR uplink transmission.
  • the UE drops the existing LTE transmission (512), and performs NR uplink transmission by the PDCCH indicating NR uplink transmission.
  • LTE uplink transmission is performed and NR uplink transmission is performed by the PDCCH indicating NR uplink transmission. Drop the LTE transmission from the symbol to be performed, and performs the NR transmission.
  • the UE determines that the LTE uplink transmission is performed only in a subframe indicated by an uplink subframe by receiving configuration information on which the LTE uplink transmission is performed. It may be determined that NR uplink transmission is performed among the remaining subframes not indicated by the frame.
  • FIG. 6 is a diagram illustrating a scheme for controlling power of uplink transmission according to Embodiments 5 and 6 of the present invention.
  • Embodiments 5 and 6 may be applied when the terminal is set to NR E-UTRA Dual Connectivity (NE-DC).
  • NE-DC NR E-UTRA Dual Connectivity
  • the UE transmits P_LTE 602, which is the maximum transmit power for uplink transmission in SCG, P_NR 603, which is the maximum transmit power for uplink transmission in MCG, and maximum in NE-DC.
  • P_total 601, which is the transmission power is set.
  • the fifth embodiment provides a case in which the UE has a capability for dynamic transmission power distribution.
  • the terminal when the terminal has the capability to perform dynamic transmission power distribution, the terminal transmits the capability signal for the dynamic transmission power distribution to the LTE base station or the NR base station in advance.
  • the UE has a capability for dynamic transmission power distribution, and the UE overlaps the subframe i 604 for LTE uplink transmission and the slot k 606 for NR uplink transmission.
  • the UE may lower the transmission power of the SCG using E-UTRA (or LTE / LTE-A) by attaching importance to the MCG using NR.
  • E-UTRA or LTE / LTE-A
  • a problem may occur when the NR uplink transmission timing cannot be predicted due to the flexible timing support of the NR uplink transmission.
  • 5 provides a scheme for lowering the power of LTE uplink considering the processing capability of NR uplink.
  • the UE may receive a PDCCH indicating NR uplink transmission.
  • a value 611 obtained by adding the NE-DC processing capability 610 set to the UE from the last symbol 609 of the PDCCH indicating NR uplink transmission is a start symbol (i.e., subframe i Earlier than the start symbol of 604) reduce the transmit power of the LTE uplink transmission (508).
  • the NE-DC processing capability 610 configured for the UE may be a symbol number N1 corresponding to the time taken for PDSCH reception for the PDSCH processing capability if the UE receives the PDCCH for scheduling the PDSCH, and has a constant X. It may also be N1 + X.
  • the NE-DC processing capability 610 configured for the UE may be the symbol number N2 corresponding to the time taken for PUSCH preparation for the PUSCH processing capability, if the UE receives the PDCCH for scheduling the PUSCH, and may be a constant Y. It may also be N2 + Y.
  • the NE-DC processing capability 610 may be defined by receiving a PDCCH for processing capability required for HARQ-ACK transmission corresponding to a downlink semi-persistent scheduling (SPS) release and defining the number of N symbols from the last symbol. It may be.
  • SPS downlink semi-persistent scheduling
  • the number of N symbols may be determined differently according to the subcarrier spacing of the LTE cell or the NR cell. For example, it can be determined as 13 for 15KHz, 15 for 30KHz, 22 for 60KHz, and 25 for 120KHz. Or conservatively determine the NE-DC processing capability 610 with a maximum value of N1 or N1 + X, N2 or N2 + Y, N and the terminal reduces the power of the LTE uplink transmission using the set value. Can be. Before the base station sets the NE-DC processing capability 610 as a higher signal, the terminal transmits the PDSCH processing capability or PUSCH processing capability related information to the base station, and the base station receives the above processing received from the terminal. In consideration of capability related information, a value of N1 or N1 + X, N2 or N2 + Y, N appropriate to the terminal is set as an upper signal, and the terminal may receive the setting.
  • a sixth embodiment will be provided for a case in which the UE has a capability for dynamic transmission power distribution.
  • the terminal when the terminal has a capability for dynamic transmission power distribution, the terminal transmits a capability signal for the dynamic transmission power distribution to the LTE base station or the NR base station in advance.
  • the UE may receive a PDCCH indicating NR uplink transmission while performing LTE uplink transmission in the subframe 605. At this time, the UE drops the LTE transmission that was being performed (612), and performs NR uplink transmission by the PDCCH indicating NR uplink transmission.
  • the UE drops the LTE transmission that was being performed (612), and performs NR uplink transmission by the PDCCH indicating NR uplink transmission.
  • LTE uplink transmission is performed and NR uplink transmission is performed by the PDCCH indicating NR uplink transmission. Drop the LTE transmission from the symbol to be performed, and performs the NR transmission.
  • the reason for dropping the LTE uplink transmission instead of reducing the power of the LTE uplink transmission in the terminal operation as described above is because it is impossible to change the transmission power in the middle of the subframe in the case of LTE uplink transmission. Therefore, when NR uplink transmission occurs during the LTE uplink transmission as described above, the UE drops the LTE uplink transmission, is indicated to the PDCCH, or performs the NR uplink transmission set by the higher signal.
  • the seventh embodiment will be provided for a case in which the UE has a capability for dynamic transmission power distribution.
  • the NE-DC terminal determines another Pcmax for LTE subframes. That is, the terminal receives the configuration of the DL, UL, flexible, reserved slots for the slots from the NR base station from the upper signal (system information, or RRC signal), so that uplink transmission for the NR in the UL slot or flexible slot Determining that this may occur, the LTE subframe 704 overlapping even in one OFDM symbol with the UL slot or flexible slot 720 where NR uplink may occur, and the DL slot or reserved slot where NR uplink cannot occur Pcmax is determined for the LTE subframe 705 that overlaps with 730, respectively.
  • system information, or RRC signal system information, or RRC signal
  • Pcmax the maximum value of LTE transmit power
  • Pcmax the maximum value of LTE transmit power
  • Pcmax the maximum value of LTE transmit power
  • the value is determined to be less than or equal to 711.
  • the p_LTE and p_NR may be received by the terminal from an upper signal transmitted from the LTE base station or the NR base station, and r may be set to values for each LTE subframe with a value less than or equal to 1, and the LTE base station or The terminal may receive from an upper signal transmitted from the NR base station.
  • the UE may set Pcmax of NR to a value less than or equal to min (p_NR, P_total-p_lte_actual) in order to allocate transmission power (P_NR) of NR. have.
  • the UE allocates P_LTE less than or equal to the LTE Pcmax 710 for LTE uplink transmission.
  • p_lte_actual 712 is allocated to perform LTE uplink transmission.
  • the UE allocates P_LTE less than or equal to the LTE Pcmax 711 for the LTE uplink transmission and performs LTE uplink transmission.
  • the UE may control the downlink control channel and NE uplink transmission even if the NE-DC processing capability is set by the RRC, even if the NR UL slot or the flexible slot.
  • the slots are slots for which NR UL cannot be transmitted due to DC processing capability, there is no need to limit the LTE transmit power in the LTE uplink subframe overlapping the NR slots.
  • the NE-DC terminal may determine Pcmax to be less than or equal to p_LTE and determine P_LTE in the LTE uplink subframe.
  • r set from the NR base station or the LTE base station may be determined as 1, and P_LTE may be determined.
  • the NE-DC processing capability configured for the UE may be a symbol number N1 corresponding to the time taken for PDSCH reception for the PDSCH processing capability if the UE receives the PDCCH for scheduling the PDSCH, and N1 + plus a constant X. It may be X.
  • the NE-DC processing capability configured for the UE may be the symbol number N2 corresponding to the time taken for PUSCH preparation for the PUSCH processing capability if the UE receives the PDCCH for scheduling the PUSCH, and N2 + plus a constant Y. It may be Y.
  • the NE-DC processing capability may be defined by receiving a PDCCH for processing capability required for HARQ-ACK transmission corresponding to a downward semi-persistent scheduling (SPS) release and defining the number of N symbols from the last symbol.
  • SPS semi-persistent scheduling
  • the constant value may be determined according to the subcarrier spacing of the NR cell.
  • the number of N symbols may be determined differently according to the subcarrier spacing of the LTE cell or the NR cell. For example, it can be determined as 13 for 15KHz, 15 for 30KHz, 22 for 60KHz, and 25 for 120KHz.
  • the NE-DC processing capability is set to the maximum or minimum value of N1 or N1 + X, N2 or N2 + Y, N, and the terminal reduces the power of LTE uplink transmission by using the set value. Can be.
  • the terminal Before the base station sets the NE-DC processing capability to the terminal as a higher signal, the terminal transmits the PDSCH processing capability or PUSCH processing capability related information to the base station, and the base station receives the processing capability received from the terminal. In consideration of the related information, an appropriate N1 or N1 + X, N2 or N2 + Y, N value is set as an upper signal to the terminal, and the terminal may receive the setting.
  • an eighth embodiment will be provided for a case in which the UE has a capability for dynamic transmission power distribution.
  • the NE-DC terminal determines another Pcmax for LTE subframes. That is, the terminal receives the configuration of the DL, UL, flexible, reserved slots from the NR base station from the upper signal (system information or RRC signal), and the uplink transmission for the NR may occur in the UL slot or flexible slot It is determined that the UL subframe 804 overlapping the UL slot or flexible slot 820, which may occur in NR uplink transmission, in one OFDM symbol, and the DL slot or reserved slot 830, in which NR uplink transmission does not occur. Pcmax is determined for LTE subframe 805, respectively.
  • Pcmax the maximum value of the LTE transmit power
  • p_LTE 810
  • Pcmax the maximum value of the LTE transmit power
  • the UE may set Pcmax of the NR to a value less than or equal to min (p_NR, P_total-p_lte_actual) in order to allocate the transmission power (P_NR) of the NR.
  • the UE allocates P_LTE less than or equal to the LTE Pcmax 810 for LTE uplink transmission.
  • p_lte_actual 812 is allocated to perform LTE uplink transmission.
  • the subframe 805 it may be assumed that there is no NR uplink transmission, so that the UE allocates P_LTE less than or equal to the LTE Pcmax 811 for LTE uplink transmission to perform LTE uplink transmission.
  • the UE may control the downlink control channel indicating the uplink transmission of the NR and the NE even if the NE UL slot or the flexible slot is used.
  • the slots are slots for which NR UL cannot be transmitted due to DC processing capability, there is no need to limit the LTE transmit power in the LTE uplink subframe overlapping the NR slots. Accordingly, in such a case, the NE-DC terminal may determine to maintain Pcmax in the LTE uplink subframe and determine P_LTE.
  • the NE-DC processing capability configured for the UE may be a symbol number N1 corresponding to the time taken for PDSCH reception for the PDSCH processing capability if the UE receives the PDCCH for scheduling the PDSCH, and N1 + plus a constant X. It may be X.
  • the NE-DC processing capability configured for the UE may be the symbol number N2 corresponding to the time taken for PUSCH preparation for the PUSCH processing capability if the UE receives the PDCCH for scheduling the PUSCH, and N2 + plus a constant Y. It may be Y.
  • the NE-DC processing capability may be defined by receiving a PDCCH for processing capability required for HARQ-ACK transmission corresponding to a downward semi-persistent scheduling (SPS) release and defining the number of N symbols from the last symbol.
  • SPS semi-persistent scheduling
  • the constant value may be determined according to the subcarrier spacing of the NR cell.
  • the number of N symbols may be determined differently according to the subcarrier spacing of the LTE cell or the NR cell. For example, it can be determined as 13 for 15KHz, 15 for 30KHz, 22 for 60KHz, and 25 for 120KHz.
  • the NE-DC processing capability is set to the maximum or minimum value of N1 or N1 + X, N2 or N2 + Y, N, and the terminal reduces the power of LTE uplink transmission by using the set value. Can be.
  • the terminal Before the base station sets the NE-DC processing capability to the terminal as a higher signal, the terminal transmits the PDSCH processing capability or PUSCH processing capability related information to the base station, and the base station receives the processing capability received from the terminal. In consideration of the related information, an appropriate N1 or N1 + X, N2 or N2 + Y, N value is set as an upper signal to the terminal, and the terminal may receive the setting.
  • the ninth embodiment will be provided for the case in which the UE has a capability for dynamic transmission power distribution.
  • the NE-DC terminal maintains Pcmax for LTE subframes. That is, the terminal determines to apply Pcmax, the maximum value of the LTE transmit power, to all the LTE subframes 904 and 905 (910).
  • the p_LTE and p_NR may be received by the terminal from an upper signal transmitted from the LTE base station or the NR base station.
  • the UE may set Pcmax of the NR to a value less than or equal to min (p_NR, P_total-p_lte_actual) to allocate the transmission power (P_NR) of the NR.
  • the UE allocates P_LTE less than or equal to the LTE Pcmax 910 for LTE uplink transmission.
  • p_lte_actual 912 is allocated to perform LTE uplink transmission. Therefore, in the ninth embodiment, the LTE Pcmax 910 must be conservatively determined regardless of whether NR uplink transmission occurs, and even when there is no NR transmission, the LTE transmission power can only be limited lower.
  • the UE controls the downlink control channel indicating NR uplink transmission and the NE-DC processing capability. If the slots are slots for which NR UL cannot be transmitted, there is no need to limit the LTE transmit power in the LTE uplink subframe that overlaps the NR slots. Therefore, in such a case, the NE-DC terminal may determine to maintain Pcmax in the LTE uplink subframe and determine P_LTE.
  • the NE-DC processing capability configured for the UE may be a symbol number N1 corresponding to the time taken for PDSCH reception for the PDSCH processing capability if the UE receives the PDCCH for scheduling the PDSCH, and N1 + plus a constant X. It may be X.
  • the NE-DC processing capability configured for the UE may be the symbol number N2 corresponding to the time taken for PUSCH preparation for the PUSCH processing capability if the UE receives the PDCCH for scheduling the PUSCH, and N2 + plus a constant Y. It may be Y.
  • the NE-DC processing capability may be defined by receiving a PDCCH for processing capability required for HARQ-ACK transmission corresponding to a downlink semi-persistent scheduling (SPS) release and defining the number of N symbols from the last symbol.
  • SPS downlink semi-persistent scheduling
  • the constant value may be determined according to the subcarrier spacing of the NR cell.
  • the number of N symbols may be determined differently according to the subcarrier spacing of the LTE cell or the NR cell. For example, it can be determined as 13 for 15KHz, 15 for 30KHz, 22 for 60KHz, and 25 for 120KHz.
  • the NE-DC processing capability may be set to a maximum value or a minimum value of N1 or N1 + X, N2 or N2 + Y, and N may be determined conservatively, and the terminal may reduce power of LTE uplink transmission by using the set value. have.
  • the terminal Before the base station sets the NE-DC processing capability to the terminal as a higher signal, the terminal transmits the PDSCH processing capability or PUSCH processing capability related information to the base station, and the base station receives the processing capability received from the terminal. In consideration of the related information, an appropriate N1 or N1 + X, N2 or N2 + Y, N value is set as an upper signal to the terminal, and the terminal may receive the setting.
  • the UE may perform LTE uplink transmission by applying the P_LTE and perform NR uplink transmission by applying the P_NR.
  • FIG. 10 is a diagram illustrating a base station and a terminal procedure according to the embodiments proposed by the present invention.
  • the base station transmits configuration information of each cell to the terminal through the system information or higher signal.
  • the configuration information may be cell-related information (TDD or FDD information, up-down carrier frequency, up-down frequency band, up-down subcarrier spacing, etc.) of MCG or SCG cells required for dual access, and required for data transmission and reception in the MCG or SCG. It may be setting information. Or it may be configuration information related to the NE-DC processing capability described in the embodiments of the present invention.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • the base station sets uplink transmission to the terminal and transmits scheduling information indicating uplink transmission according to the embodiments proposed by the present invention.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • the uplink transmission configuration may mean uplink transmission in which transmission is configured by higher signal configuration instead of PDCCH like periodic channel information transmission, and uplink transmission indicated by the scheduling information is PUSCH transmission or HARQ-ACK. Like transmission, this may mean uplink transmission indicated by the PDCCH and transmitted from the UE.
  • the base station receives uplink transmission from the terminal according to the embodiments proposed by the present invention.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • the terminal receives configuration information of each cell from the base station through system information or higher signal.
  • the configuration information may be cell-related information (TDD or FDD information, up-down carrier frequency, up-down frequency band, up-down subcarrier spacing, etc.) of MCG or SCG cells required for dual access, and required for data transmission and reception in the MCG or SCG. It may be setting information. Or it may be configuration information related to the NE-DC processing capability described in the embodiments of the present invention.
  • the terminal may transmit PDSCH processing capability or PUSCH processing capability related information to the base station before receiving the NE-DC processing capability as a higher signal from the base station.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • the terminal receives uplink transmission configuration information from the base station according to the embodiments proposed by the present invention, and receives scheduling information indicating uplink transmission.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • the uplink transmission configuration information may refer to configuration information related to uplink transmission in which transmission is configured by higher signal configuration instead of PDCCH like periodic channel information transmission.
  • Uplink transmission indicated by the scheduling information is a PUSCH. Like transmission or HARQ-ACK transmission, it may mean uplink transmission indicated by the PDCCH and transmitted from the terminal.
  • the terminal transmits uplink transmission to the base station by controlling the transmission power according to the embodiments proposed by the present invention.
  • Controlling the transmit power may include dropping uplink transmissions of low importance or reducing uplink transmission power as described in the embodiments of the present invention.
  • the base station may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • FIG. 11 is a diagram illustrating a base station apparatus according to embodiments proposed by the present invention.
  • the controller 1101 sets necessary information according to the base station procedure according to FIG. 7 of the present invention and embodiments of the present invention, and controls uplink transmission from the terminal according to the present invention, thereby transmitting LTE or 5G control information. 1105 and the 5G data transmission and reception device 1107, and transmits the LTE or 5G data with the terminal through the LTE or 5G data transmission and reception device 1107 by scheduling the LTE or 5G data in the scheduler 1103. .
  • LTE and 5G are described together for convenience, but the base station apparatus may be an NR base station using NR radio access or an E-UTRA base station using E-UTRA radio access.
  • FIG. 12 is a diagram illustrating a terminal device according to the present invention.
  • the controller 1201 receives
  • the LTE or 5G data scheduled at the resource location is transmitted and received with the LTE or 5G base station via the LTE or 5G data transceiver 1206.
  • the LTE and 5G devices are described as if for convenience, but devices for LTE or 5G may be configured separately.
  • the base station for transmitting and receiving the control information and data may be an NR base station using NR radio access, or may be an E-UTRA base station using E-UTRA radio access.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne une technique de communication permettant une convergence de la technologie de l'IdO et d'un système de communication 5G pour qu'il prenne en charge un débit de transfert de données supérieur à celui d'un système 4G, ainsi qu'un système associé. La présente invention peut s'appliquer à des services intelligents (par exemple, des maisons intelligentes, des bâtiments intelligents, des villes intelligentes, des voitures intelligentes ou connectées, les soins de santé, l'enseignement numérique, le commerce de détail, et des services liés à la sécurité et à la sûreté) sur la base de la technologie de communication 5G et de la technologie associée à l'IdO. L'invention concerne donc un procédé et un appareil permettant de commander la puissance de transmission en liaison montante dans un système de communication sans fil.
PCT/KR2019/005401 2018-05-11 2019-05-07 Procédé et appareil de commande de puissance de transmission en liaison montante par un terminal à des fins de double connectivité dans un système de communication sans fil WO2019216612A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/053,000 US11399346B2 (en) 2018-05-11 2019-05-07 Method and apparatus for controlling uplink transmission power by terminal for dual connectivity in wireless communication system
EP19798865.2A EP3780782B1 (fr) 2018-05-11 2019-05-07 Procédé et appareil de commande de puissance de transmission en liaison montante par un terminal à des fins de double connectivité dans un système de communication sans fil

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2018-0054527 2018-05-11
KR20180054527 2018-05-11
KR10-2018-0133477 2018-11-02
KR1020180133477A KR20190129674A (ko) 2018-05-11 2018-11-02 무선 통신 시스템에서 이중 접속을 위한 단말의 상향 전송 전력 제어 방법 및 장치
KR1020180137298A KR20190129676A (ko) 2018-05-11 2018-11-09 무선 통신 시스템에서 이중 접속을 위한 단말의 상향 전송 전력 제어 방법 및 장치
KR10-2018-0137298 2018-11-09

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CN113316240A (zh) * 2020-02-27 2021-08-27 大唐移动通信设备有限公司 一种nsa中终端设备功率调整方法及装置

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WO2013048172A2 (fr) * 2011-09-29 2013-04-04 엘지전자 주식회사 Procédé d'émission en liaison montante et dispositif sans fil le mettant en oeuvre
WO2013141647A1 (fr) * 2012-03-22 2013-09-26 엘지전자 주식회사 Procédé et dispositif de commande de puissance d'émission de liaison montante dans un système d'accès sans fil
WO2014107050A1 (fr) * 2013-01-03 2014-07-10 엘지전자 주식회사 Procédé et appareil permettant de transmettre des signaux de liaison montante dans un système de communication sans fil
KR20160053939A (ko) * 2013-09-04 2016-05-13 엘지전자 주식회사 무선 통신 시스템에서 상향링크 전력을 제어하는 방법 및 장치
WO2017039167A1 (fr) * 2015-09-04 2017-03-09 삼성전자 주식회사 Procédé et appareil de gestion de la puissance de transmission en liaison montante dans un système de communication sans fil

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WO2013048172A2 (fr) * 2011-09-29 2013-04-04 엘지전자 주식회사 Procédé d'émission en liaison montante et dispositif sans fil le mettant en oeuvre
WO2013141647A1 (fr) * 2012-03-22 2013-09-26 엘지전자 주식회사 Procédé et dispositif de commande de puissance d'émission de liaison montante dans un système d'accès sans fil
WO2014107050A1 (fr) * 2013-01-03 2014-07-10 엘지전자 주식회사 Procédé et appareil permettant de transmettre des signaux de liaison montante dans un système de communication sans fil
KR20160053939A (ko) * 2013-09-04 2016-05-13 엘지전자 주식회사 무선 통신 시스템에서 상향링크 전력을 제어하는 방법 및 장치
WO2017039167A1 (fr) * 2015-09-04 2017-03-09 삼성전자 주식회사 Procédé et appareil de gestion de la puissance de transmission en liaison montante dans un système de communication sans fil

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Publication number Priority date Publication date Assignee Title
CN113316240A (zh) * 2020-02-27 2021-08-27 大唐移动通信设备有限公司 一种nsa中终端设备功率调整方法及装置

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