WO2019098587A1 - 무선 통신 시스템에서 제어 정보 송수신 방법 및 장치 - Google Patents
무선 통신 시스템에서 제어 정보 송수신 방법 및 장치 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
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- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving control information for smoothly providing a service.
- a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G network) communication system or after a LTE system (Post LTE).
- 4G network Beyond 4G network
- LTE system Post LTE
- 5G communication systems are being considered for implementation in very high frequency (mmWave) bands (e.g., 60 gigahertz (60GHz) bands).
- mmWave very high frequency
- the 5G communication system In order to mitigate the path loss of the radio wave in the very high frequency band and to increase the propagation distance of the radio wave, in the 5G communication system, beamforming, massive MIMO, full-dimension MIMO (FD-MIMO ), Array antennas, analog beam-forming, and large scale antenna technologies are being discussed.
- the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Have been developed.
- cloud RAN cloud radio access network
- D2D ultra-dense network
- CoMP Coordinated Multi-Points
- ACM Advanced Coding Modulation
- FQAM Hybrid FSK and QAM Modulation
- SWSC Sliding Window Superposition Coding
- FBMC Filter Bank Multi Carrier
- SCMA subcarrier code multiple access
- IoT Internet of Things
- IoE Internet of Everything
- M2M machine to machine
- MTC Machine Type Communication
- technologies such as a sensor network, a machine to machine (M2M), and a machine type communication (MTC) are implemented by techniques such as beam forming, MIMO, and array antennas, which are 5G communication technologies .
- M2M machine to machine
- MTC machine type communication
- the application of the cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 3eG technology and IoT technology.
- the disclosed embodiments provide a method and apparatus for transmitting / receiving control information for smoothly providing a service in a wireless communication system.
- control information can be efficiently transmitted and received in a wireless communication system.
- 1 is a diagram illustrating a downlink time-frequency domain transmission structure of an LTE, LTE-A, or similar system.
- FIG. 2 is a diagram illustrating an uplink time-frequency domain transmission structure of an LTE, LTE-A, or similar system.
- FIG. 3 is a diagram illustrating slot structure information according to a slot format indicator according to some embodiments.
- FIG. 4 is a diagram for explaining cross slot scheduling according to some embodiments.
- FIG. 5 is a diagram illustrating slots in which slot format information and scheduling configuration information according to some embodiments are provided.
- FIG. 6 is a flowchart of a method for receiving control information based on scheduling configuration information and slot format information according to some embodiments.
- FIG. 7 is a detailed flowchart of a method for receiving adaptive control information according to scheduling configuration information and slot format information according to some embodiments.
- FIG. 8 is a diagram for explaining the number of available HARQ processes according to some embodiments.
- FIG. 9 is a flow diagram of a method for receiving control information based on a residual HARQ process number, in accordance with some embodiments.
- FIG. 10 is a detailed flowchart of a method for receiving control information based on a number of residual HARQ processes in accordance with some embodiments.
- FIG. 11 is a block diagram showing the structure of a terminal according to some embodiments.
- FIG. 12 is a block diagram showing the structure of a base station according to some embodiments.
- a control information receiving method includes receiving scheduling setting information; Receiving slot format information; Determining a slot format of at least one slot based on the scheduling configuration information and the slot format information; And receiving at least one of the first type control information and the second type control information based on the determination result.
- the determining step may determine a slot format of at least one slot that is uplink or downlink schedulable, which is determined by the scheduling setting information, based on the slot format information.
- the method of claim 1, wherein if the format of the at least one slot capable of downlink or downlink scheduling is determined to be in the same format based on the slot format information, the receiving of the first type control information and the second type control information Lt; RTI ID 0.0 > of < / RTI >
- the step of receiving comprises receiving only the first type control information if at least one format of the downlink schedulable slots is determined to be an uplink format based on the slot format information, And if the format of at least one slot capable of uplink scheduling is determined to be a slot of the downlink format, only the second type control information may be received.
- the receiving step determines that the format of at least one slot capable of uplink scheduling is all a slot of an uplink format based on the slot format information or that the format of at least one slot capable of downlink scheduling is all And to receive the first type control information and the second type control information if it is determined to be a downlink format.
- the receiving step may be to receive the first type control information and the second type control information when the format of at least one slot among the predetermined number of slots capable of scheduling uplink or downlink scheduling is unknown .
- the determining step includes the step of determining whether the slot format information includes information indicating that the information on the format of the predetermined slot is an unknown format or that the information on the format of the predetermined slot is not included in the slot format information At least one of the cases may be that the format of the predetermined slot is determined to be an unknown format.
- a control information receiving method comprising: obtaining HARQ process setting information; Identifying a number of currently performing HARQ processes; Obtaining information on the number of remaining HARQ processes based on the HARQ process setup information and the number of the identified HARQ processes being performed; And selectively receiving scheduling control information based on information about the number of remaining HARQ processes obtained.
- the step of acquiring the HARQ process setup information may be to acquire the HARQ process setup information based on at least one of performance information of the UE and information received from the base station.
- the step of identifying the number of currently performing HARQ processes may be to identify the number of currently performing HARQ processes based on transmission of HARQ-ACK feedback or transmission of uplink data.
- the selectively receiving may be to receive control information if the number of remaining HARQ processes is greater than or equal to one.
- a terminal for receiving control information in a wireless communication system includes a transceiver for communicating with a base station; And receiving scheduling configuration information, receiving slot format information, determining a slot format of at least one slot based on the scheduling configuration information and the slot format information, and determining, based on the determination result, And second type control information.
- the processor may determine a slot format of at least one of uplink or downlink schedulable slots determined by the scheduling setting information based on the slot format information.
- the processor determines whether one of the first type control information and the second type control information Lt; / RTI >
- the processor receives only the first type control information if it is determined that the format of at least one slot capable of downlink scheduling is an uplink format based on the slot format information, It is possible to receive only the second type control information if it is determined that the format of at least one slot capable of uplink scheduling is a slot of a downlink format.
- the processor determines that the format of at least one slot capable of uplink scheduling is all a slot of an uplink format based on the slot format information or that the format of at least one slot capable of downlink scheduling is all downlink Format, it is possible to receive the first type control information and the second type control information.
- the format of two or more slots among the uplink or downlink schedulable slots is different from the format of the first type control information and the second type control Information can be received.
- the processor may receive the first type control information and the second type control information when the format of at least one slot among the predetermined number of slots that can be scheduled for the uplink or downlink scheduling is unknown.
- a terminal for receiving control information in a wireless communication system includes: a transmission / reception unit for communicating with a base station; And obtaining information on the number of remaining HARQ processes based on the HARQ process setting information and the number of the identified HARQ processes, And a processor for selectively receiving scheduling control information based on information about the number of the obtained remaining HARQ processes.
- Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer-
- the instructions that perform the processing equipment may also be capable of providing steps for executing the functions described in the flowchart block (s).
- each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s).
- the functions mentioned in the blocks may occur out of order. For example, two blocks that are shown one after the other may actually be executed substantially concurrently or it may be possible that the blocks are sometimes performed in reverse order according to the corresponding function.
- " part " used in the present embodiment means a hardware component such as software or an FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit) do.
- 'part' is not meant to be limited to software or hardware.
- &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors.
- 'parts' may include components such as software components, object-oriented software components, class components and task components, and processes, functions, Microcode, circuitry, data, databases, data structures, tables, arrays, and variables, as will be appreciated by those skilled in the art.
- components and components may be further combined with a smaller number of components and components or further components and components.
- the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.
- 'to' may include one or more processors.
- the wireless communication system is not limited to providing initial voice-oriented services.
- 3GPP's High Speed Packet Access (HSPA), Long Term Evolution or Evolved Universal Terrestrial Radio Access (E-UTRA) To a broadband wireless communication system that provides high-speed, high-quality packet data services such as the LTE-A, 3GPP2 high rate packet data (HRPD), UMB (Ultra Mobile Broadband), and IEEE 802.16e communication standards.
- a 5G or NR (new radio) communication standard is being developed with the fifth generation wireless communication system.
- 5G communication systems are being considered for implementation in very high frequency (mmWave) bands (such as 60 gigahertz (60GHz) bands).
- mmWave very high frequency
- 60GHz gigahertz
- Beamforming, Massive MIMO, Full-Dimensional MIMO (FD-MIMO ), Array Antenna, Analog Beam-forming, and Large Scale Antenna technologies are being discussed.
- the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, (D2D), a wireless backhaul, a moving network, a cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation (Interference Cancellation) Have been developed.
- ACM Advanced Coding Modulation
- FQAM Hybrid FSK and QAM Modulation
- SWSC Sliding Window Superposition Coding
- FBMC Filter Bank Multi Carrier
- SCMA sparse code multiple access
- IoT Internet of Things
- IoE Internet of Everything
- M2M machine to machine
- MTC Machine Type Communication
- technologies such as a sensor network, a machine to machine (M2M), and a machine type communication (MTC) are implemented by techniques such as beam forming, MIMO, and array antennas, which are 5G communication technologies .
- M2M machine to machine
- MTC machine type communication
- the application of the cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 3eG technology and IoT technology.
- Enhanced Mobile BroadBand eMBB
- massive Machine Type Communications mMTC
- URLLC Ultra-Reliable and Low-Latency Communications
- eMBB Enhanced Mobile BroadBand
- mMTC massive Machine Type Communications
- URLLC Ultra-Reliable and Low-Latency Communications
- eMBB may be a high-speed transmission of high-capacity data
- mMTC may be a terminal power minimization and connection of multiple terminals
- URLLC may be a service aiming at high reliability and low latency.
- LTE systems such as LTE systems or 5G / NR (new radio, next radio) after LTE.
- the base station can schedule eMBB data corresponding to the eMBB service to a specific UE at a specific transmission time interval (TTI).
- TTI transmission time interval
- the UEs scheduled for eMBB and the UEs scheduled for URLLC may be the same UE or different UEs.
- a communication system may require a method for providing various services together.
- the above-mentioned mMTC, URLLC, and eMBB are only examples of different service types, and the service types to which the present embodiment is applied are not limited to the above-described examples.
- a reference signal measures the state of a channel between a base station and a user, such as a channel strength, a distortion, an interference strength, a Gaussian noise, etc. in a wireless mobile communication system, which is used to assist in demodulation and decoding of data. Also according to some embodiments, the reference signal may be used to measure the condition of the wireless channel.
- a receiver can determine the state of a radio channel between a receiver and a transmitter by measuring a received signal strength of a reference signal transmitted over a radio channel, with respect to a reference signal transmitted by the transmitter at a predetermined transmit power. The state of this radio channel is used to determine what data rate the receiver will request from the transmitter.
- radio resources such as time, frequency, and transmission power for transmitting a signal are limited. That is, when a large amount of radio resources are allocated to the reference signal, the radio resources that can be allocated to the data signal are relatively reduced. Therefore, the radio resources allocated to the reference signal should be appropriately determined in consideration of the system throughput.
- MIMO Multiple Input Multiple Output
- the total system frequency band that can be operated by the base station and the frequency band that can be operated by the terminal may be the same or different. If it is different, the base station can support the terminal to instruct downlink or uplink data transmission / reception according to a specific frequency band.
- a BWP Bandwidth Part
- a terminal sets a plurality of BWP candidates that can be operated by the UE in the system frequency band, and receives one or two or more BWPs for uplink or downlink data transmission / It is possible to utilize it as an application.
- Radio resources for SPS sini-persistent scheduling
- Radio resources may be set up for periodic traffic transmissions such as VoIP or for emergency services such as URLLC.
- the radio resource setting for Grant-free can be preset in advance in advance.
- the UE can transmit (or receive) data information without receiving control information for granting the uplink data scheduling information in a predetermined resource for Grant-free.
- the present invention is not limited to the above example.
- a UE may include a slot format indicator (SFI) for informing slot configuration information in a TDD (Time Division Duplex) environment in the case of performing uplink or downlink related scheduling control information search through a downlink control channel, , Slot Format Indicator) information, which is a method of searching for the scheduling control information adaptively.
- SFI slot format indicator
- the terminal may not need to search the control information for scheduling the downlink if the slot format indicator indicates successive uplinks in successive slots.
- the predefined control information format is determined to be for uplink or downlink scheduling and all of them are searched, the power consumption of the UE may decrease.
- the present invention can provide a method and apparatus for adaptively searching for and receiving control information.
- the base station may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a wireless access unit, a base station controller, or a node on a network.
- the terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing communication functions.
- a downlink (DL) is a radio transmission path of a signal transmitted from a base station to a mobile station
- an uplink (UL) is a radio transmission path of a signal transmitted from a mobile station to a base station.
- LTE or LTE-A system is a radio transmission path of a signal transmitted from a base station to a mobile station
- UL uplink
- embodiments of the present invention will be described as an example of an LTE or LTE-A system, but embodiments of the present invention may be applied to other communication systems having a similar technical background or channel form.
- 5G mobile communication technology developed after LTE-A (5G, new radio, NR) could be included.
- embodiments of the present invention may be applied to other communication systems by a person skilled in the art without departing from the scope of the present invention.
- an OFDM (Orthogonal Frequency Division Multiplexing) scheme is used in a downlink (DL) and a Single Carrier Frequency Division Multiple (SC-FDMA) scheme is used in an uplink Access) method.
- the uplink refers to a radio link through which a terminal or user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (gNode B or base station (BS)
- UE terminal or user equipment
- MS mobile station
- the multi-access method as described above can be applied to a radio communication system such that the time-frequency resources to transmit data or control information for each user do not overlap each other, that is, orthogonality is established , And allocates and manages each user's data or control information.
- the LTE system adopts a Hybrid Automatic Repeat reQuest (HARQ) scheme in which a physical layer resends data when a decoding failure occurs in initial transmission.
- HARQ Hybrid Automatic Repeat reQuest
- the receiver when the receiver fails to correctly decode (decode) data, the receiver transmits information (NACK: Negative Acknowledgment) indicating decoding failure to the transmitter so that the transmitter can retransmit the corresponding data in the physical layer.
- the receiver combines the data retransmitted by the transmitter with the previously decoded data to improve data reception performance.
- ACK acknowledgment
- 1 is a diagram illustrating a downlink time-frequency domain transmission structure of an LTE, LTE-A, or similar system.
- a horizontal axis represents a time domain and a vertical axis represents a frequency domain.
- the minimum transmission unit in the time domain is an OFDM symbol.
- N symb OFDM symbols 102 are gathered to form one slot 106, and two slots form one subframe 105.
- the length of the slot is 0.5 ms
- the length of the subframe may be 1.0 ms.
- the radio frame 114 may be a time domain comprising 10 subframes.
- the minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is a total Carrier subcarriers 104. [ However, these specific values can be applied variably depending on the system.
- N symb may be set to one of 7 or 14, and for a 5G or NR system mini slot, N symb may be set to 1, 2, 3, 4, 5, 6, or 7 Lt; / RTI >
- a basic unit of a resource can be represented by an OFDM symbol index and a subcarrier index as a resource element (RE) 112.
- a resource block (RB or Physical Resource Block) (PRB) 108 may be defined as N symb consecutive OFDM symbols 102 in the time domain and N RB consecutive subcarriers 104 in the frequency domain. Therefore, one RB 108 in one slot may be composed of N symb x N RB REs 112.
- the data rate increases in proportion to the number of RBs scheduled to the UE.
- An LTE system can define and operate six transmission bandwidths.
- the downlink transmission bandwidth and the uplink transmission bandwidth may be different from each other.
- the channel bandwidth represents the RF bandwidth corresponding to the system transmission bandwidth.
- Table 1 below shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system. For example, an LTE system with a 10 MHz channel bandwidth can have a transmission bandwidth of 50 RBs.
- downlink control information In the case of downlink control information, it may be transmitted within the first N OFDM symbols in a subframe.
- N ⁇ 1, 2, 3 ⁇ in general. Therefore, the N value can be variably applied to each subframe according to the amount of control information to be transmitted in the current subframe.
- the transmitted control information may include a control channel transmission interval indicator indicating whether the corresponding control information is transmitted over OFDM symbols, scheduling information for downlink data or uplink data, and HARQ ACK / NACK information.
- scheduling information for downlink data or uplink data is transmitted from a base station to a mobile station through downlink control information (DCI).
- DCI downlink control information
- the DCI is defined according to various formats, and it is determined according to each format whether the scheduling information (UL grant) for the uplink data or the scheduling information (DL grant) for the downlink data, whether the size of the control information is compact DCI , Whether to apply spatial multiplexing using multiple antennas, whether or not DCI is used for power control, and the like.
- DCI format 1 which is scheduling control information (DL grant) for downlink data, may include at least one of the following control information.
- Type 0 allocates resources by RBG (Resource Block Group) by applying bitmap method.
- RBG Resource Block Group
- the basic unit of scheduling is an RB represented by time and frequency domain resources
- the RBG is composed of a plurality of RBs and becomes a basic unit of scheduling in the type 0 scheme.
- Type 1 allows a specific RB to be allocated within the RBG.
- Resource block assignment Indicates the RB allocated to data transmission.
- the resources to be represented are determined according to the system bandwidth and the resource allocation method.
- MCS Modulation and coding scheme
- HARQ process number Indicates the HARQ process number.
- - New data indicator Indicates whether HARQ is initial transmission or retransmission.
- Redundancy version Indicates the redundancy version of HARQ.
- TPC Transmit Power Control
- the DCI may perform physical downlink control channel (PDCCH) (or control information, hereinafter) or EPDCCH (Enhanced PDCCH) Enhanced control information, hereinafter referred to as mixed use).
- PDCH physical downlink control channel
- EPDCCH Enhanced PDCCH
- mixed use Enhanced control information
- the DCI is scrambled with a specific Radio Network Temporary Identifier (RNTI) (or a terminal identifier) independently for each terminal, a CRC (Cyclic Redundancy Check) is added, channel-coded, ≪ / RTI >
- RNTI Radio Network Temporary Identifier
- CRC Cyclic Redundancy Check
- the PDCCH may be mapped and transmitted during the control channel transmission interval.
- the frequency domain mapping location of the PDCCH may be determined by the identifier (ID) of each terminal and may be transmitted over the entire system transmission band.
- the downlink data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for transmitting downlink data.
- PDSCH physical downlink shared channel
- the PDSCH can be transmitted after the control channel transmission interval, and the scheduling information such as the specific mapping position and the modulation scheme in the frequency domain is determined based on the DCI transmitted through the PDCCH.
- the base station notifies the UE of the modulation scheme applied to the PDSCH and the transport block size (TBS) to be transmitted to the UE using the MCS among the control information configuring the DCI.
- the MCS may be composed of 5 bits or more or fewer bits.
- the TBS corresponds to a size before channel coding for error correction is applied to a data transmission block (TB) to be transmitted by the base station.
- the modulation schemes supported by the LTE system are QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), and 64QAM, and the respective 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 can be transmitted.
- QPSK Quadrature Phase Shift Keying
- 16QAM Quadrature Amplitude Modulation
- 64QAM the respective modulation order
- Qm modulation order
- 2 bits per symbol for QPSK modulation 4 bits per symbol for 16QAM modulation
- 6 bits per symbol for 64QAM modulation can be transmitted.
- 256QAM or more modulation method can be used according to the system modification.
- FIG. 2 is a diagram illustrating a transmission structure in a time-frequency domain, which is a radio resource region, in an uplink of LTE, LTE-A, or similar system.
- the horizontal axis of the radio resource region represents a time domain
- the vertical axis represents a frequency domain.
- the minimum transmission unit in the time domain is an SC-FDMA symbol
- N symbUL SC-FDMA symbols 202 may be gathered to form one slot 206.
- two slots form one subframe 205.
- the minimum transmission unit in the frequency domain is the subcarrier
- the overall system transmission bandwidth is the total Carriers 204.
- the sub- May have a value proportional to the system transmission band.
- the basic unit of resources in the time-frequency domain is a resource element (RE) 212, which can be defined as an SC-FDMA symbol index and a subcarrier index.
- a resource block pair (RB pair) 108 includes N symb And may be defined as N RB consecutive subcarriers in the frequency domain and consecutive SC-FDMA symbols. Thus, one RB consists of N symb x N RB REs.
- the minimum transmission unit of data or control information is RB unit. In case of PUCCH, it is mapped to a frequency region corresponding to 1 RB and transmitted for one sub-frame.
- a PUCCH or a PUSCH which is an uplink physical channel through which HARQ ACK / NACK corresponding to a PDCCH / EPDDCH including a physical channel for downlink data transmission or a semi-persistent scheduling release (SPS release)
- SPS release semi-persistent scheduling release
- HARQ ACK / NACK corresponding to a PDCCH / EPDCCH including a PDSCH or an SPS release transmitted in an n-4th subframe is PUCCH or PUSCH.
- the downlink HARQ employs an asynchronous HARQ scheme in which the data retransmission time point is not fixed. That is, when HARQ NACK is fed back from the UE to the initial transmission data transmitted from the base station, the base station freely determines the transmission time point of the retransmission data by the scheduling operation. The UE may perform buffering on the data determined to be error as a result of decoding the received data for HARQ operation, and then perform combining with the next retransmitted data.
- the UE When the UE receives the PDSCH including the downlink data transmitted from the base station in the subframe n, the UE transmits the uplink control information including the HARQ ACK or NACK of the downlink data to the subframe n + k via the PUCCH or PUSCH.
- k may be defined differently depending on the FDD or TDD (time division duplex) of the LTE system and its subframe setting. For example, in the FDD LTE system, k is fixed at 4. In case of the TDD LTE system, k may be changed according to the subframe setting and the subframe number. The value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers.
- the uplink HARQ adopts a synchronous HARQ scheme in which the data transmission time is fixed. That is, a physical uplink shared channel (PUSCH), which is a physical channel for uplink data transmission, a PDCCH, which is a downlink control channel precedent thereto, and a physical hybrid indicator (PHICH), which is a physical channel through which a downlink HARQ ACK / NACK corresponding to a PUSCH is transmitted.
- PUSCH physical uplink shared channel
- PDCCH which is a downlink control channel precedent thereto
- PHICH physical hybrid indicator
- the uplink / downlink timing relationship of the uplink / downlink channel can be transmitted / received according to the following rule.
- k can be defined differently according to the FDD or TDD (time division duplex) of the LTE system and its setting. For example, in the case of an FDD LTE system, k may be fixed at 4. In case of the TDD LTE system, k may be changed according to the subframe setting and the subframe number. The value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers.
- the PHICH corresponds to the PUSCH transmitted from the UE in the subframe i-k.
- k may be defined differently depending on the FDD or TDD of the LTE system and its setting. For example, in the case of an FDD LTE system, k may be fixed at 4. In case of the TDD LTE system, k may be changed according to the subframe setting and the subframe number. The value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers.
- PDCCH and PDSCH configured by C-RNTI configured by C-RNTI, Transmission mode (Transmission mode) DCI format Search area (Search Space)
- the transmission scheme of the PDSCH corresponding to the PDCCH (Transmission scheme of PDSCH corresponding to PDCCH)
- Mode 1 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, Single-antenna port, port 0 DCI format 1 A UE specific by C-RNTI (UE specific by C-RNTI) Single-antenna port, port 0 Mode 2 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, Transmit diversity DCI format 1 A UE specific by C-RNTI (UE specific by C-RNTI) Transmit diversity Mode 3 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, Transmit diversity DCI Format 2A A A UE specific by C-RNTI (UE specific by C-RNTI) Large delay CDD or Transmit
- Mode 5 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, Transmit diversity DCI format 1D A UE specific by C-RNTI (UE specific by C-RNTI) Multi-user MIMO Mode 6 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, Transmit diversity DCI Format 1B A UE specific by C-RNTI (UE specific by C-RNTI) A closed-loop spatial multiplexing using a single transmission layer (a single transmission layer)
- Mode 7 DCI Format 1A A common and UE specific area (C-RNTI) by C-RNTI, If the number of PBCH antenna ports is 1, then a single antenna port, port 0, is used for different transmit diversity (if the number of PBCH antenna ports is one, single-antenna port, port 0 is used) DCI format 1 A UE specific by C-RNTI (UE specific by C-RNTI) Single-antenna port, port 5 Mode 8 DCI Format 1A A common and
- Table 2 shows the supported DCI format types for each transmission mode under the conditions set by the C-RNTI in 3GPP TS 36.213.
- the terminal performs search and decoding on the assumption that the corresponding DCI format exists in the control domain according to a predetermined transmission mode. For example, if the terminal is instructed to transmit mode 8, the terminal searches DCI format 1A in a common search space and a UE-specific search space, Only DCI format 2B is searched.
- the above-described wireless communication system has been described on the basis of the LTE system, and the contents of the present invention are not limited to the LTE system but can be applied to various wireless communication systems such as NR and 5G.
- the k value may be applied to a system using a modulation scheme corresponding to FDD when applied to another wireless communication system.
- FIG. 3 is a diagram illustrating slot structure information according to a slot format indicator according to some embodiments.
- a slot format indicator may be a technique applicable in a TDD environment in which uplink and downlink coexist in the same frequency band.
- a slot structure type for one slot period or several slots may be transmitted to one terminal, a plurality of terminal groups, or all terminals through a slot format indicator through a terminal-specific or terminal group common or common downlink control channel .
- the base station informs the UE whether the entire slot is downlink or uplink for each of the N slots by using a slot format indicator, or informs the UE whether a specific symbol is downward It is possible to indicate whether it is a link or an uplink.
- the slot format indicator may be able to be transmitted with L1 signaling or higher signaling such as RRC, MAC CE.
- the base station informs the UE of a table composed of a combination of downlink or uplink configured in slot units or symbol units by upper signaling, and transmits a UE-specific L1 signaling It may be possible to indicate a specific value among the values set in the table set as the upper signaling to the UEs.
- the table is not limited to the examples of Tables 3 to 5, although Table 3, Table 4 or Table 5 below may be considered.
- Slot Format Indicator Setting Information Example 2 number SFI Setting period (slot unit) SFI setting information One One Down, up, unknown 1 2 One Downward, Upward, Unknown combination 2 3 10 Downward, Upward, Unknown combination 3 ... ... ...
- the slot format indicator may be set to an uplink called unknown (hereinafter referred to as " Korean " or " English ") other than information indicating whether a specific symbol or a specific slot is an uplink or a downlink But may also indicate that there is an interval that is not set as a downlink.
- the unknown period is used for a reserved resource (hereinafter referred to as " Korean ") or a downlink (or a downlink to downlink) ).
- the UE receives the slot format indicator information through the group common or common downlink control channel 302, and the slot format indicator information is updated for the four slots 304, 306, 308, Link or downlink or unknown information in a slot unit 312 or a symbol unit or a symbol group unit.
- the period 314 in which the slot format indicator information is transmitted is transmitted every four slots.
- N may be 1, 2, 4, 5, 10, 20.
- the present invention is not limited to the above example, and the N value may be variable depending on the system.
- FIG. 4 is a diagram for explaining cross slot scheduling according to some embodiments.
- the UE may search for downlink control information indicating uplink data scheduling or downlink data scheduling through a downlink UE specification or a common control channel 402. Further, the slot for which the uplink data scheduling or the downlink data scheduling detected through the downlink control information search is generated may be the same slot 404 as the slot to which the downlink control information is transmitted, or may be a different slot 406.
- cross slot scheduling may mean uplink data or downlink data scheduling in a slot different from the slot in which downlink control information is detected.
- Reference numeral 410 in FIG. 4 may denote a slot unit.
- the UE determines whether the uplink data or the downlink data scheduled through the downlink control information searched through the downlink control channel exists in the k-th slot or in the k + n (or k-n) .
- the n value may be a slot unit or a unit consisting of a symbol unit or a combination of a slot and a symbol.
- the base station may set the candidates of n values in advance through upper signaling.
- the UE checks the uplink or downlink data scheduling information of the UE through the downlink control channel 402 and determines which slot the actual scheduled downlink data reception or uplink data transmission information is generated in (i.e., n value), or it is possible to check the value of n in the downlink control information for instructing data scheduling or separately check the value of n by the upper signaling.
- n value the number of slots in the downlink control information for instructing data scheduling or separately check the value of n by the upper signaling.
- the former means the dynamic method
- the latter means the quasi-static method.
- n it is possible to continue to apply a fixed value of n, or to keep a specific field among the fields constituting the control information (for example, the length of the scheduled data area or the MCS value or the number of code block groups, Period, etc.), it is implicitly determined that the value of n changes, and the corresponding n value can be applied.
- the uplink data or the downlink data transmission interval size can be scheduled not only in the slot unit but also in the symbol unit by the downlink control information. If scheduling is performed on a symbol basis or a transmission unit having a length smaller than the slot is scheduled, Can be b (where b is 0 or other value). And the n value when the transmission unit is the same as the slot is c (where c is 0 or other value). And if the transmission unit is larger than the slot, the n value of the case may be d (where d is a value other than 0 or otherwise). The values of b, c, and d may all be the same, or only some of the same, or all different. According to some embodiments, the basis of a transmission unit may be a slot, a symbol, or a group of symbols.
- downlink or uplink data scheduling may occur in a slot where control information is generated rather than cross slot scheduling, but in a wide range, May also be included.
- FIG. 5 is a diagram illustrating slots in which slot format information and scheduling configuration information according to some embodiments are provided.
- the UE receives the slot format indicator transmitted through the UE common or UE-specific control channel 502, and determines whether to search for downlink control information according to the slot configuration indicated by the slot format indicator. For example, if a particular slot is a downlink through a slot format indicator, the terminal may perform downlink control information search. On the other hand, if the specific slot is uplink or unknown through the slot format indicator, the UE can not perform downlink control information search.
- the terminal can determine whether to search for control information according to the slot configuration. For example, if the downlink exists in the first symbol among the specific slots, the UE can perform the control information search. On the other hand, when the downlink exists in the middle, the UE may not perform the control information search.
- the UE may be preconfigured with UE-specific or UE common control channels 516, 518, 520, 522 for receiving information indicating downlink or uplink data scheduling in higher signaling.
- UE-specific or UE-specific control channel 502 for receiving a slot format indicator and a UE-specific or UE common control channel 516 for receiving information indicating downlink or uplink data scheduling in higher signaling
- FIG. 1 a UE-specific or UE-specific control channel 502 for receiving a slot format indicator and a UE-specific or UE common control channel 516 for receiving information indicating downlink or uplink data scheduling in higher signaling
- slot 1 504, slot 2 506, and slot 4 510 transmitted in a terminal common or UE specific control channel 502 are slot 3 508 in downlink
- the UE can perform the downlink control information search only in the control channel 516 of the slot 1, the control channel 518 of the slot 2, and the control channel 522 of the slot 4 in the uplink. That is, since the slot including the corresponding control channel is changed to the uplink by the slot format indicator in the control channel 520 of the slot 3 preset by the higher signaling, the terminal omits the search for the control channel 520 of the slot 3 It can be possible.
- the UE can adaptively search for downlink control information. For example, in a slot format indicator, slot 1 504 indicates downlink, and slots 2 through 4 (506, 508, 510) indicate uplink, the UE may perform downlink scheduling It may be possible to omit the control information search for indicating the control information.
- a cross-slot scheduling downlink scheduling that can be scheduled through downlink control information included in the slot 1 504 Data may be available in slots 2 through 4 (506, 508, 510).
- the UE since the UE has already obtained information indicating that the slots 2 to 4 (506, 508, 510) have been set as the uplink in the slot format indicator in advance, the UE transmits the UE-specific or terminal (group) common downlink control channel 516
- the downlink control information search for scheduling the downlink data may be omitted.
- the UE may perform only downlink control information search for scheduling uplink data in the control channel 516 of slot 1.
- cross slot scheduled uplink data that can be scheduled through the downlink control information included in slot 1 504 when the candidate values of n capable of performing uplink data through cross slot scheduling are set to 1 and 2 It may be possible to exist only in slots 2 to 3 (506, 508). Alternatively, cross-slot scheduled uplink data that can be scheduled through downlink control information included in slot 2 506 may be available only in slots 3 through 4 (508, 510).
- the UE schedules the uplink data in the control channel 516 of slot 1 It is possible to omit searching for downlink control information. Also, the UE may search downlink control information for scheduling downlink data on the control channel 516. Since the slot 4 510 is set uplink, the UE can perform downlink control information search for scheduling uplink data (or downlink data) in the control channel 518 of the slot 2.
- the UE when all the configurations of slots corresponding to values of n capable of performing uplink cross slot scheduling in a UE-specific downlink control channel or a UE-specific downlink control channel exist in a specific slot are downlink, Only the control information indicating the scheduling can be searched, or the control information search indicating the uplink scheduling can be omitted.
- the UE transmits control information for instructing uplink scheduling in a control channel Or it may omit the control information search indicating downlink scheduling.
- the downlink of the slot configuration may refer to a case where all the symbols constituting the slot are downlinks, or more than a predetermined number of symbols among the symbols constituting one slot are downlinks.
- the above-described slot configuration refers to a case where all the symbols constituting the slot are uplinks or that the number of symbols constituting one slot is equal to or more than a predetermined number of symbols.
- the downlink control information may be downlink control information
- the downlink control channel may be a downlink control channel.
- the present invention is not limited to the above example.
- FIG. 6 is a flowchart of a method for receiving control information based on scheduling configuration information and slot format information according to some embodiments.
- the terminal may receive the scheduling configuration information.
- the scheduling configuration information may include information regarding cross-slot scheduling as described above. According to some embodiments, the scheduling configuration information may include information about the interval of slots in which cross-slot scheduling setup is possible.
- the scheduling configuration information may be a slot interval unit or a symbol interval unit variable degree between a slot for receiving uplink or downlink scheduling information and a slot for which the actual scheduled uplink or downlink data transmission is performed And the like.
- the present invention is not limited to the above example, and may include all information necessary for setting related to scheduling in the UE.
- the terminal may receive slot format information.
- the slot format information may include a slot format identifier.
- the present invention is not limited to the above example, and may include all types of information that can indicate a slot format.
- the terminal may determine the slot format of at least one slot based on the scheduling configuration information and the slot format information.
- a terminal may determine a slot format of at least one of uplink or downlink schedulable slots determined by the scheduling configuration information based on slot format information. For example, if the UE is capable of uplink or downlink scheduling of slots k + 1, k + 2, and k + 3 in a predetermined slot k, the UE generates slots k + 1 and k + And k + 3 are set uplink or downlink, respectively.
- the terminal may include information indicating that the information on the format of the predetermined slot is an unknown format in the slot format information, or information on the format of the predetermined slot is not included in the slot format information And a case where at least one of the cases where the format of the predetermined slot is not known can be determined as an unknown format. For example, when information indicating that slot format information of a predetermined slot is not received or information on a format of a predetermined slot is included in the slot format information, the terminal determines that the format of the predetermined slot is the unknown format .
- the present invention is not limited to the above example.
- the terminal if the format of the at least one slot capable of uplink or downlink scheduling is determined to be the same format based on the slot format information, the terminal generates one of the first type control information and the second type control information Only the type of control information can be received or searched.
- the first type control information may be control information for scheduling uplink data
- the second type control information may be control information for scheduling downlink data.
- the control information is not limited to the above example.
- the terminal can receive or search only the first type control information.
- the first type control information may be control information for scheduling uplink data.
- the control information is not limited to the above example.
- the UE can receive or search only the second type control information if it is determined that the formats of the at least one slots capable of UL scheduling based on the slot format information are all slots in the DL format.
- the second type control information may be control information for scheduling downlink data.
- the control information is not limited to the above example.
- the UE determines whether at least one of the slots that can perform uplink scheduling based on the slot format information is a slot of the uplink format, or if the format of at least one slot capable of downlink scheduling is all If it is determined to be the downlink format, the first type control information and the second type control information can be received or searched.
- the first type control information may be control information for scheduling uplink data
- the second type control information may be control information for scheduling downlink data.
- the control information is not limited to the above example.
- Control information can be received.
- the first type control information may be control information for scheduling uplink data
- the second type control information may be control information for scheduling downlink data.
- the control information is not limited to the above example.
- the terminal may receive first type control information and second type control information have.
- the first type control information may be control information for scheduling uplink data
- the second type control information may be control information for scheduling downlink data.
- the control information is not limited to the above example.
- FIG. 7 is a detailed flowchart of a method for receiving adaptive control information according to scheduling configuration information and slot format information according to some embodiments.
- the UE can receive the configuration information capable of cross-slot scheduling from the base station through higher signaling.
- the setting information may mean a slot position (n) capable of uplink or downlink data scheduling.
- a slot capable of uplink or downlink data scheduling through a downlink control channel existing in a k-th slot may be a (k + n) -th slot, and n may be set to one or a plurality of values through upper signaling .
- the BS or the MS may select one of n candidate values from the control information indicating uplink or downlink data scheduling.
- the terminal can set the following table (Table 6).
- the UE may be able to select one of the possible n values using 2 bits in the control information transmitted via L1 signaling. At least one of n1, n2, n3, and n4 may be set to an n value through signaling.
- the units of n, n1, n2, n3, n4 may be slots or symbols or groups of symbols, and the value may be zero or a positive or negative number.
- the UE can receive the slot format indicator information on the UE (group) common downlink control channel.
- the UE can determine whether the condition 1 for the adaptive control information search is satisfied in an arbitrary kth slot.
- slot information configuration information set through a slot format indicator and cross slot scheduling configuration information set by upper signaling may correspond to an element for determining whether condition 1 is satisfied.
- step 770 the terminal can search for the first type control information or the second type control information in the kth slot.
- condition 1 may include the following examples.
- the UE can search for the first type control information when all the slots corresponding to the candidate values of n capable of downlink data cross slot scheduling are set as the uplink by the slot format indicator.
- the first type control information may include a control information format for scheduling uplink data.
- the UE can search for the second type control information when all the slots corresponding to the candidate values of n capable of performing uplink data cross slot scheduling are set to the downlink by the slot format indicator.
- the second type control information may include a control information format for scheduling downlink data.
- the terminal can search for the first type control information and the second type control information in the kth slot. If the condition 1 is not satisfied, the first type control information may mean a control information format for scheduling uplink data, and the second type control information may mean a control information format for scheduling downlink data.
- FIG. 8 is a diagram for explaining the number of available HARQ processes according to some embodiments.
- the UE can receive the downlink control information search areas 802, 804, 806, and 808 through upper signaling.
- Reference numerals 820, 822, 824, and 826 in FIG. 8 may represent slot units, symbol units, or symbol group units.
- the UE may set the number of HARQ processes for uplink data or downlink data scheduling to UE common or UE-specific upper signaling, or may always use a value specified in the specification.
- the UE when the UE has one HARQ process for downlink data scheduling, the UE transmits downlink data in the first slot 810, the second slot 810, and the second slot 810 through downlink data scheduling in a downlink control channel 802, It may be possible to receive downlink data at slot 812 or slot 3 814 and send HARQ-ACK reports thereon via resource area 818 present in slot 4 816. [ At this time, since there is no remaining HARQ process number for downlink data scheduling in the downlink control channels existing in slots 2 to 4 (812 to 816), the UE can skip the control information search for indicating downlink data scheduling. Alternatively, the terminal may perform only control information search indicating uplink data scheduling.
- the UE may transmit the uplink data in slot 1 (810), slot 2 (810) through uplink data scheduling in a downlink control channel (802) (812) or slot 3 (814). If the uplink data is transmitted in the slot 3 814, the UE may skip the control information search for instructing the uplink data scheduling through the downlink control channels 804 and 806 existing until the uplink data is transmitted.
- the UE can determine whether to search for control information for scheduling uplink or downlink data in a downlink control channel existing in a specific slot according to the number of remaining HARQ process numbers.
- the number of remaining HARQ process numbers may mean the number of HARQ process numbers that can provide downlink data scheduling in the case of downlink data scheduling.
- the UE may not expect the UE to receive downlink data scheduling in a predetermined HARQ process number until HARQ-ACK feedback for a predetermined HARQ process number is reported through downlink data scheduling.
- uplink data scheduling it may mean the number of HARQ process numbers that can provide uplink data scheduling.
- the UE may not expect the UE to receive the uplink data scheduling with a predetermined HARQ process number until the uplink data transmission for the predetermined HARQ process number is performed through the uplink data scheduling.
- the UE may omit searching for a control information format capable of instructing uplink scheduling (or Expecting not to search) may be possible. That is, the UE does not search for a control information format capable of instructing uplink scheduling in a situation where the entire available HARQ process number is already scheduled and the entire HARQ process number is not transmitted in the uplink data transmission can do.
- the UE may omit searching for a control information format capable of instructing downlink scheduling Or not expecting to search) may be possible. That is, the UE does not search for a control information format capable of instructing downlink scheduling in a situation where the entire available HARQ process number is already scheduled and the entire HARQ process number does not transmit HARQ-ACK feedback .
- FIG. 9 is a flow diagram of a method for receiving control information based on a residual HARQ process number, in accordance with some embodiments.
- step 920 the UE can acquire HARQ process setup information.
- the HARQ process setup information may include information about the period of the HARQ process for downlink or uplink data scheduling.
- the HARQ processor configuration information may include a number of HARQ processes that the UE can perform in parallel.
- the HARQ processor configuration information may be pre-configured for UE common or UE-specific high signaling (e.g., via RRC parameters), or may always use the values specified in the specification. Also, HARQ processor configuration information may be received through a downlink control channel. Also, according to some embodiments, the terminal may acquire HARQ process configuration information based on at least one of performance information of the UE and information received from the base station.
- the terminal may identify the number of HARQ processes in progress.
- the UE can identify the number of currently performing HARQ processes based on whether HARQ-ACK feedback transmission or uplink data transmission is performed. In a case where uplink data is not transmitted in an HARQ process corresponding to a predetermined uplink scheduling, or HARQ-ACK feedback is not transmitted in an HARQ process corresponding to a predetermined downlink scheduling, the UE determines that an HARQ process is being performed can do. The UE can determine how many HARQ processes are being performed.
- the UE can obtain information on the number of remaining HARQ processes based on the HARQ process configuration information and the number of identified HARQ processes being performed.
- the information about the number of remaining HARQ processes may include information about how many of the currently available HARQ processes are.
- the terminal may selectively receive or search the scheduling control information based on information regarding the number of remaining HARQ processes obtained.
- the terminal may receive or search control information if the number of remaining HARQ processes is one or more. If the number of remaining HARQ processes is zero, control information may not be received or searched.
- FIG. 10 is a detailed flowchart of a method for receiving control information based on a number of residual HARQ processes in accordance with some embodiments.
- the UE can start performing downlink control information search through the UE-specific downlink control channel or the UE-specific signaling.
- the UE can confirm whether there is a residual HARQ process number for downlink data or uplink data scheduling.
- step 1050 the UE does not perform the control information search indicating the downlink data scheduling or the uplink data scheduling control information It may not search.
- downlink data scheduling is performed using n HARQ process numbers, and then at least one downlink data scheduled through the corresponding HARQ process number (Remaining) HARQ process number for downlink data scheduling may be zero when the UE does not transmit the HARQ-ACK feedback for the uplink data scheduling.
- uplink data scheduling is performed with n HARQ process numbers
- uplink data scheduling is performed using n HARQ process numbers, and at least one uplink data is scheduled to be uplinked through the corresponding HARQ process number
- the available HARQ process number for uplink data scheduling may be 0.
- the UE may adaptively search control information for scheduling uplink or downlink data, The execution can be omitted.
- step 1060 the UE performs a control information search indicating downlink data scheduling, It is possible to perform control information search that instructs data scheduling.
- (Remaining) HARQ process number for the HARQ process may be one or more than one value.
- the HARQ process number capable of performing the uplink data scheduling is n, if the UE performs at least one uplink data transmission for the uplink data scheduled through the corresponding HARQ process number, )
- the HARQ process number may be one or more than one value.
- FIG. 11 is a block diagram showing the structure of a terminal according to some embodiments.
- the terminal 1100 of the present invention may include a transceiver 1110, a memory 1120, and a processor 1130.
- the transmission / reception unit 1110, the memory 1120, and the processor 1130 of the terminal 1100 can operate according to the communication method of the terminal 1100 described above.
- the constituent elements of the terminal 1100 are not limited to the above-described examples.
- the terminal 1100 may include more or fewer components than the above-described components.
- the transmission / reception unit 1110, the memory 1120, and the processor 1130 may be implemented as a single chip.
- the processor 1130 may also be at least one.
- the transmission / reception unit 1110 can transmit and receive signals to / from the base station.
- the signal may include control information and data.
- the transceiver 1110 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, an RF receiver for low-noise amplifying the received signal, and down-converting the frequency of the received signal.
- this is only an embodiment of the transmitting and receiving unit 1110, and the components of the transmitting and receiving unit 1110 are not limited to the RF transmitter and the RF receiver.
- the transceiver 1110 may receive a signal over a wireless channel, output it to the processor 1130, and transmit the signal output from the processor 1130 over a wireless channel.
- the memory 1120 may store programs and data necessary for the operation of the terminal 1100. In addition, the memory 1120 may store control information or data included in the signal obtained by the terminal 1100. [ The memory 1120 may be comprised of a storage medium such as ROM, RAM, hard disk, CD-ROM and DVD, or a combination of storage media.
- the processor 1130 can control a series of processes so that the terminal can operate according to the above-described embodiment.
- the transmitter / receiver 1100 receives the cross slot scheduling setup information and the slot format indicator information, and the slots corresponding to candidate values of n capable of downlink data cross slot scheduling in the k < th > It can be determined whether all the slots corresponding to the candidate values of n capable of scheduling uplink data cross slot scheduling by the slot format indicator are set to the downlink by the slot format indicator.
- the processor 1130 may search for the first type control information or the second type control information, or may control the transmission / reception unit 1110 to search for the first type control information and the second type control information.
- the processor 1130 may determine whether there is a remaining HARQ process number, and control the Tx / Rx 1100 to search for or omit control information.
- FIG. 12 is a block diagram showing the structure of a base station according to some embodiments.
- the base station 1200 may include at least one of a transceiver 1210, a memory 1220, and a processor 1230.
- the transmission / reception unit 1210, the memory 1220, and the processor 1230 of the base station 1200 may operate according to the communication method of the terminal 1100 and the base station 1200 described above.
- the constituent elements of the base station 1200 are not limited to the above-described examples.
- base station 1200 may include more or fewer components than those described above.
- the transmission / reception unit 1210, the memory 1220, and the processor 1230 may be implemented in the form of a single chip.
- the processor 1230 may also be at least one.
- the transmitting and receiving unit 1210 can transmit and receive signals to and from the terminal.
- the signal may include control information and data.
- the transceiver unit 1210 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying the received signal and down-converting the frequency of the received signal.
- this is only an embodiment of the transmitting and receiving unit 1210, and the components of the transmitting and receiving unit 1210 are not limited to the RF transmitter and the RF receiver.
- the transceiver unit 1210 may receive a signal through a wireless channel, output the signal to the processor 1230, and transmit the signal output from the processor 1230 through a wireless channel.
- the memory 1220 can store programs and data necessary for the operation of the base station 1200. [ In addition, the memory 1220 may store control information or data included in the signal obtained at the base station 1200.
- the memory 1220 may comprise a storage medium such as ROM, RAM, hard disk, CD-ROM and DVD, or a combination of storage media.
- the processor 1230 can control a series of processes so that the base station can operate according to the embodiment of the present invention described above.
- the processor 1230 may control the transceiver 1210 to provide at least one of scheduling configuration information, slot format information, and HARQ process configuration information to the UE.
- the processor 1230 may also control the transceiver 1210 to process the scheduling information and provide downlink control information including scheduling information to the terminal.
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Abstract
Description
채널대역폭(Channel bandwidth) BW Channel [MHz] | 1.4 | 3 | 5 | 10 | 15 | 20 |
송신 대역폭 설정(Transmission bandwidth configuration) N RB | 6 | 15 | 25 | 50 | 75 | 100 |
송신 모드 (Transmission mode) | DCI 포맷 | 탐색 영역 (Search Space) | PDCCH에 대응되는 PDSCH의 송신 스킴 (Transmission scheme of PDSCH corresponding to PDCCH) |
모드 1 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 싱글-안테나 포트, 포트 0(Single-antenna port, port 0) |
DCI 포맷 1 | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 싱글-안테나 포트, 포트 0(Single-antenna port, port 0) | |
모드 2 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) |
DCI 포맷 1 | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) | |
모드 3 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) |
DCI 포맷 2A | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 큰 지연 CDD(Large delay CDD) 또는 송신 다이버시티(Transmit diversity) | |
모드 4 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) |
DCI 포맷 2 | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 클로즈-루프 공간 다중화(Closed-loop spatial multiplexing) 또는 송신 다이버시티(Transmit diversity) | |
모드 5 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) |
DCI 포맷 1D | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 멀티 유저(Multi-user) MIMO | |
모드 6 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | 송신 다이버시티(Transmit diversity) |
DCI 포맷 1B | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 싱글 송신 레이어를 이용한 클로즈 루프 공간 다중화(Closed-loop spatial multiplexing using a single transmission layer) | |
모드 7 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | PBCH 안테나 포트의 개수가 1개인 경우, 싱글 안테나 포트, 포트 0이 다른 송신 다이버시티에 이용됨(If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used) 또는 송신 다이버시티 |
DCI 포맷 1 | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 싱글-안테나 포트, 포트 5(Single-antenna port, port 5) | |
모드 8 | DCI 포맷 1A | C-RNTI에 의한 공통 및 단말 특정 영역(Common andUE specific by C-RNTI) | PBCH 안테나 포트의 개수가 1개인 경우, 싱글 안테나 포트, 포트 0이 다른 송신 다이버시티에 이용됨(If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see otherwise Transmit diversity) |
DCI 포맷 2B | C-RNTI에 의한 단말 특정 영역(UE specific by C-RNTI) | 이중 레이어 송신, 포트 7 및 포트 8 또는 싱글 안테나 포트, 포트 4 또는 8 |
번호 | SFI 설정 정보 |
1 | 하향, 상향, unknown의 조합 1 |
2 | 하향, 상향, unknown의 조합 2 |
3 | 하향, 상향, unknown의 조합 3 |
… | … |
번호 | SFI 설정 주기 (슬롯 단위) | SFI 설정 정보 |
1 | 1 | 하향, 상향, unknown의 조합 1 |
2 | 1 | 하향, 상향, unknown의 조합 2 |
3 | 10 | 하향, 상향, unknown의 조합 3 |
… | … | … |
번호 | SFI 설정 정보 |
1 | 특정 SFI 설정 주기 값에 대한하향, 상향, unknown의 조합 1 |
2 | 특정 SFI 설정 주기 값에 대한하향, 상향, unknown의 조합 2 |
3 | 특정 SFI 설정 주기 값에 대한하향, 상향, unknown의 조합 3 |
… | … |
번호(인덱스) | n 값 |
1 | n1 |
2 | n2 |
3 | n3 |
4 | n4 |
Claims (15)
- 제어 정보 수신 방법에 있어서,스케줄링 설정 정보를 수신하는 단계;슬롯 포맷 정보를 수신하는 단계;상기 스케줄링 설정 정보 및 상기 슬롯 포맷 정보에 기초하여 적어도 하나의 슬롯들의 슬롯 포맷을 판단하는 단계; 및상기 판단 결과에 기초하여 제1 유형 제어 정보 및 제2 유형 제어 정보 중 적어도 하나를 수신하는 단계를 포함하는 방법.
- 제1항에 있어서,상기 판단하는 단계는,상기 슬롯 포맷 정보에 기초하여 상기 스케줄링 설정 정보에 의해 결정되는 상향링크 또는 하향링크 스케줄링 가능한 적어도 하나의 슬롯들의 슬롯 포맷을 판단하는 것인 방법.
- 제2항에 있어서,상기 수신하는 단계는,상기 슬롯 포맷 정보에 기초하여 상기 상향링크 또는 하향링크 스케줄링이 가능한 적어도 하나의 슬롯들의 포맷이 동일한 포맷이라 판단되면, 상기 제1 유형 제어 정보 및 상기 제2 유형 제어 정보 중 하나의 유형의 제어 정보만을 수신하는 것인 방법.
- 제2항에 있어서,상기 수신하는 단계는,상기 슬롯 포맷 정보에 기초하여 상기 하향링크 스케줄링이 가능한 적어도 하나의 슬롯들의 포맷이 모두 상향링크 포맷이라 판단되면, 상기 제1 유형 제어 정보만을 수신하고,상기 슬롯 포맷 정보에 기초하여 상기 상향링크 스케줄링이 가능한 적어도 하나의 슬롯들의 포맷이 모두 하향링크 포맷의 슬롯이라 판단되면, 상기 제2 유형 제어 정보만을 수신하는 것인 방법.
- 제2항에 있어서,상기 수신하는 단계는,상기 상향링크 또는 하향링크 스케줄링 가능한 소정의 개수의 슬롯들 중 적어도 하나의 슬롯의 포맷을 알 수 없는 경우, 제1 유형 제어 정보 및 제2 유형 제어 정보를 수신하는 것인 방법.
- 제5항에 있어서,상기 판단하는 단계는,상기 슬롯 포맷 정보 내에 소정의 슬롯의 포맷에 대한 정보가 알 수 없는 포맷임을 나타내는 정보가 포함되거나, 상기 슬롯 포맷 정보 내에 상기 소정의 슬롯의 포맷에 대한 정보가 포함되어 있지 않은 경우 중 적어도 하나의 경우를 상기 소정의 슬롯의 포맷을 알 수 없는 포맷이라 판단하는 것인 방법.
- 제어 정보 수신 방법에 있어서,HARQ 프로세스 설정 정보를 획득하는 단계;현재 수행중인 HARQ 프로세스의 숫자를 식별하는 단계;상기 HARQ 프로세스 설정 정보 및 상기 식별된 수행중인 HARQ 프로세스의 숫자에 기초하여 잔여 HARQ 프로세스의 숫자에 관한 정보를 획득하는 단계; 및상기 획득된 잔여 HARQ 프로세스의 숫자에 관한 정보에 기초하여 스케줄링 제어 정보를 선택적으로 수신하는 단계를 포함하는 방법.
- 제7항에 있어서상기 HARQ 프로세스 설정 정보를 획득하는 단계는,단말의 성능 정보 및 기지국으로부터 수신된 정보 중 적어도 하나에 기초하여 상기 HARQ 프로세스 설정 정보를 획득하는 방법.
- 제7항에 있어서,현재 수행중인 HARQ 프로세스의 숫자를 식별하는 단계는,HARQ-ACK 피드백의 송신 또는 상향링크 데이터의 송신 여부에 기초하여 현재 수행중인 HARQ 프로세스의 숫자를 식별하는 것인 방법.
- 제7항에 있어서,상기 선택적으로 수신하는 단계는,잔여 HARQ 프로세스의 숫자가 1 이상인 경우 제어 정보를 수신하는 것인 방법.
- 무선 통신 시스템에서 제어 정보를 수신하는 단말에 있어서,기지국과 통신하는 송수신부; 및스케줄링 설정 정보를 수신하고, 슬롯 포맷 정보를 수신하고, 상기 스케줄링 설정 정보 및 상기 슬롯 포맷 정보에 기초하여 적어도 하나의 슬롯들의 슬롯 포맷을 판단하며, 상기 판단 결과에 기초하여 제1 유형 제어 정보 및 제2 유형 제어 정보 중 적어도 하나를 수신하는 프로세서를 포함하는 단말.
- 제11항에 있어서,상기 프로세서는,상기 슬롯 포맷 정보에 기초하여 상기 스케줄링 설정 정보에 의해 결정되는 상향링크 또는 하향링크 스케줄링 가능한 적어도 하나의 슬롯들의 슬롯 포맷을 판단하는 것인 단말.
- 제12항에 있어서,상기 프로세서는,상기 슬롯 포맷 정보에 기초하여 상기 상향링크 스케줄링이 가능한 적어도 하나의 슬롯들의 포맷이 모두 상향링크 포맷의 슬롯이라 판단되거나, 상기 하향링크 스케줄링이 가능한 적어도 하나의 슬롯들의 포맷이 모두 하향링크 포맷이라 판단되면, 상기 제1 유형 제어 정보 및 제2 유형 제어 정보를 수신하는 것인 단말.
- 제12항에 있어서,상기 프로세서는,상기 슬롯 포맷 정보에 기초하여 상기 상향링크 또는 하향링크 스케줄링 가능한 적어도 하나의 슬롯들 중 둘 이상의 슬롯의 포맷이 서로 상이한 포맷이라 판단되면, 상기 제1 유형 제어 정보 및 상기 제2 유형 제어 정보를 수신하는 것인 단말.
- 무선 통신 시스템에서 제어 정보를 수신하는 단말에 있어서,기지국과 통신하는 송수신부; 및HARQ 프로세스 설정 정보를 획득하고, 현재 수행중인 HARQ 프로세스의 숫자를 식별하고, 상기 HARQ 프로세스 설정 정보 및 상기 식별된 수행중인 HARQ 프로세스의 숫자에 기초하여 잔여 HARQ 프로세스의 숫자에 관한 정보를 획득하며, 상기 획득된 잔여 HARQ 프로세스의 숫자에 관한 정보에 기초하여 스케줄링 제어 정보를 선택적으로 수신하는 프로세서를 포함하는 단말.
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AU2018367704A AU2018367704B2 (en) | 2017-11-16 | 2018-11-06 | Method and apparatus for transmitting and receiving control information in wireless communication system |
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Also Published As
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KR102378516B1 (ko) | 2022-03-24 |
AU2018367704B2 (en) | 2023-01-05 |
CN111373822B (zh) | 2024-02-20 |
CN111373822A (zh) | 2020-07-03 |
AU2018367704A1 (en) | 2020-06-25 |
US11431445B2 (en) | 2022-08-30 |
EP3672348A1 (en) | 2020-06-24 |
KR20190056167A (ko) | 2019-05-24 |
EP3672348A4 (en) | 2021-03-10 |
US20200274652A1 (en) | 2020-08-27 |
EP3672348B1 (en) | 2023-05-10 |
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