WO2023055196A1 - 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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Definitions
- the present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving uplink control information in a wireless communication system.
- Mobile communication systems have been developed to provide voice services while ensuring user activity.
- the mobile communication system has expanded its scope to data services as well as voice.
- the explosive increase in traffic causes a shortage of resources and users demand higher-speed services, so a more advanced mobile communication system is required. there is.
- next-generation mobile communication system The requirements of the next-generation mobile communication system are to support explosive data traffic, drastic increase in transmission rate per user, significantly increased number of connected devices, very low end-to-end latency, and high energy efficiency.
- Dual Connectivity Massive MIMO (Massive Multiple Input Multiple Output), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super Wideband Wideband) support, various technologies such as device networking (Device Networking) are being studied.
- Massive MIMO Massive Multiple Input Multiple Output
- NOMA Non-Orthogonal Multiple Access
- Super Wideband Wideband various technologies such as device networking (Device Networking) are being studied.
- a technical problem of the present disclosure is to provide a method and apparatus for transmitting one or more hybrid automatic repeat and request (HARQ)-acknowledgment (ACK) information.
- HARQ hybrid automatic repeat and request
- ACK acknowledgenowledgment
- An object of the present disclosure is to provide a method and apparatus for transmitting and receiving a HARQ-ACK codebook composed of HARQ-ACK information for a unicast physical downlink shared channel (PDSCH) and/or a multicast PDSCH.
- PDSCH physical downlink shared channel
- a method for performing uplink transmission by a terminal in a wireless communication system includes a multicast physical downlink shared channel based on a plurality of Group-Radio Network Temporary Identifiers (G-RNTI) from a base station.
- G-RNTI Group-Radio Network Temporary Identifiers
- Receiving (multicast PDSCH); Receiving, from the base station, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), the DCI including information on a T-DAI value for an HARQ-ACK codebook for multicast, ; determining a plurality of HARQ-ACK codebooks for the multicast PDSCHs by applying the T-DAI value for each G-RNTI to the plurality of G-RNTIs; and transmitting HARQ-ACK information determined by concatenating the plurality of HARQ-ACK codebooks to the base station.
- DCI downlink control information
- PUSCH physical uplink shared channel
- a method for performing uplink reception by a base station in a wireless communication system includes, to a terminal, transmitting multicast physical downlink shared channels (PDSCHs) based on a plurality of G-RNTIs; Transmitting downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to the terminal; and receiving HARQ-ACK information from the terminal.
- the DCI may include information about a T-DAI value for a HARQ-ACK codebook for multicast.
- the HARQ-ACK information may be determined by concatenating a plurality of HARQ-ACK codebooks for the multicast PDSCHs determined by applying the T-DAI value for each G-RNTI to the plurality of G-RNTIs.
- a HARQ-ACK codebook is efficiently generated based on a downlink assignment index (DAI) value of control information for scheduling a group common PDSCH and control information for scheduling a PUSCH in consideration of HARQ-ACK activation or deactivation.
- DAI downlink assignment index
- a DAI value for multicast is separately set, and the corresponding DAI value is applied to a plurality of group identification information to report HARQ-ACK information for multicast PDSCH (s) through PUSCH It works.
- FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure may be applied.
- FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
- FIG 3 illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.
- FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied.
- FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure may be applied.
- FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
- FIG. 7 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
- FIG 8 illustrates a HARQ-ACK process for downlink data in a wireless communication system to which the present disclosure can be applied.
- FIG 9 illustrates a HARQ-ACK transmission and reception procedure for multicast PDSCH according to an embodiment of the present disclosure.
- FIG. 10 illustrates transmission timing of a unicast/multicast HARQ-ACK report in a wireless communication system to which the present disclosure can be applied.
- DAI downlink assignment index
- FIG. 12 is a diagram illustrating an operation of a terminal for a method for transmitting and receiving control information according to an embodiment of the present disclosure.
- FIG. 13 is a diagram illustrating an operation of a base station for a method for transmitting and receiving control information according to an embodiment of the present disclosure.
- FIG. 14 illustrates a block configuration diagram of a wireless communication device according to an embodiment of the present disclosure.
- first and second are used only for the purpose of distinguishing one component from another component and are not used to limit the components, unless otherwise specified. The order or importance among them is not limited. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment. can also be called
- the present disclosure describes a wireless communication network or wireless communication system, and operations performed in the wireless communication network control the network and transmit or receive signals in a device (for example, a base station) in charge of the wireless communication network. It can be done in the process of receiving (receive) or in the process of transmitting or receiving signals from a terminal coupled to the wireless network to or between terminals.
- a device for example, a base station
- transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal through a corresponding channel.
- transmitting a control channel means transmitting control information or a signal through the control channel.
- transmitting a data channel means transmitting data information or a signal through the data channel.
- downlink means communication from a base station to a terminal
- uplink means communication from a terminal to a base station.
- a transmitter may be part of a base station and a receiver may be part of a terminal.
- a transmitter may be a part of a terminal and a receiver may be a part of a base station.
- a base station may be expressed as a first communication device
- a terminal may be expressed as a second communication device.
- a base station includes a fixed station, a Node B, an evolved-NodeB (eNB), a Next Generation NodeB (gNB), a base transceiver system (BTS), an access point (AP), and a network (5G Network), AI (Artificial Intelligence) system/module, RSU (road side unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.
- AI Artificial Intelligence
- RSU road side unit
- robot UAV: Unmanned Aerial Vehicle
- AR Algmented Reality
- VR Virtual Reality
- a terminal may be fixed or mobile, and a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an advanced mobile (AMS) Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (road side unit), It can be replaced with terms such as robot, AI (Artificial Intelligence) module, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.
- AI Artificial Intelligence
- drone UAV: Unmanned Aerial Vehicle
- AR Algmented Reality
- VR Virtual Reality
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented with radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA
- LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE.
- 3GPP NR New Radio or New Radio Access Technology
- 3GPP LTE/LTE-A/LTE-A pro is an evolved version of 3GPP LTE/LTE-A/LTE-A pro.
- LTE refers to technology after 3GPP Technical Specification (TS) 36.xxx Release 8.
- TS Technical Specification
- LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A
- LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro
- 3GPP NR refers to technology after TS 38.xxx Release 15.
- LTE/NR may be referred to as a 3GPP system.
- "xxx" means standard document detail number.
- LTE/NR may be collectively referred to as a 3GPP system.
- TS 36.211 Physical Channels and Modulation
- TS 36.212 Multiplexing and Channel Coding
- TS 36.213 Physical Layer Procedures
- TS 36.300 General Description
- TS 36.331 Radio Resource Control
- TS 38.211 Physical Channels and Modulation
- TS 38.212 Multiplexing and Channel Coding
- TS 38.213 Physical Layer Procedures for Control
- TS 38.214 Physical Layer Procedures for Data
- TS 38.300 General description of NR and New Generation-Radio Access Network (NG-RAN)
- TS 38.331 Radio Resource Control Protocol Specification
- channel state information - reference signal resource indicator channel state information - reference signal resource indicator
- channel state information - reference signal channel state information - reference signal
- Layer 1 reference signal received quality Layer 1 reference signal received quality
- orthogonal frequency division multiplexing orthogonal frequency division multiplexing (orthogonal frequency division multiplexing)
- radio resource control radio resource control
- Synchronization signal block including primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBCH)
- NR is an expression showing an example of 5G RAT.
- a new RAT system including NR uses an OFDM transmission scheme or a transmission scheme similar thereto.
- the new RAT system may follow OFDM parameters different from those of LTE.
- the new RAT system follows the numerology of the existing LTE/LTE-A as it is, but may support a larger system bandwidth (eg, 100 MHz).
- one cell may support a plurality of numerologies. That is, terminals operating with different numerologies can coexist in one cell.
- a numerology corresponds to one subcarrier spacing in the frequency domain.
- Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.
- FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure may be applied.
- the NG-RAN is a NG-RA (NG-Radio Access) user plane (ie, a new AS (access stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and control plane (RRC) protocol termination to the UE.
- the gNBs are interconnected through an Xn interface.
- the gNB is also connected to a New Generation Core (NGC) through an NG interface. More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and to a User Plane Function (UPF) through an N3 interface.
- AMF Access and Mobility Management Function
- UPF User Plane Function
- FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
- An NR system can support multiple numerologies.
- numerology may be defined by subcarrier spacing and Cyclic Prefix (CP) overhead.
- the multiple subcarrier spacing can be derived by scaling the basic (reference) subcarrier spacing by an integer N (or ⁇ ).
- N or ⁇
- the numerology used can be selected independently of the frequency band.
- various frame structures according to a plurality of numerologies may be supported.
- OFDM numerology and frame structure that can be considered in the NR system will be described.
- Multiple OFDM numerologies supported in the NR system can be defined as shown in Table 1 below.
- NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz/60 kHz, dense-urban, lower latency and a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz is supported to overcome phase noise.
- SCS subcarrier spacing
- the NR frequency band is defined as two types of frequency ranges (FR1 and FR2).
- FR1 and FR2 may be configured as shown in Table 2 below.
- FR2 may mean millimeter wave (mmW).
- ⁇ f max 480 10 3 Hz
- N f 4096.
- T TA (N TA +N TA,offset )T c before the start of the corresponding downlink frame in the corresponding terminal.
- slots are numbered in increasing order of n s ⁇ ⁇ 0,..., N slot subframe, ⁇ -1 ⁇ within a subframe, and within a radio frame They are numbered in increasing order n s,f ⁇ ⁇ 0,..., N slot frame, ⁇ -1 ⁇ .
- One slot is composed of consecutive OFDM symbols of N symb slots , and N symb slots are determined according to CP.
- the start of slot n s ⁇ in a subframe is temporally aligned with the start of OFDM symbol n s ⁇ N symb slot in the same subframe. Not all terminals can simultaneously transmit and receive, which means that not all OFDM symbols in a downlink slot or uplink slot can be used.
- Table 3 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N slot frame, ⁇ ), and the number of slots per subframe (N slot subframe, ⁇ ) in the general CP.
- Table 4 represents the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.
- one subframe may include 4 slots.
- a mini-slot may contain 2, 4 or 7 symbols, more or fewer symbols.
- an antenna port a resource grid, a resource element, a resource block, a carrier part, etc. can be considered Hereinafter, the physical resources that can be considered in the NR system will be described in detail.
- the antenna port is defined such that the channel on which a symbol on the antenna port is carried can be inferred from the channel on which other symbols on the same antenna port are carried. If the large-scale properties of the channel on which the symbols on one antenna port are carried can be inferred from the channel on which the symbols on the other antenna port are carried, then the two antenna ports are quasi co-located or QC/QCL (quasi co-located or quasi co-location).
- the wide range characteristic includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
- FIG 3 illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.
- a resource grid is composed of N RB ⁇ N sc RB subcarriers in the frequency domain, and one subframe is composed of 14 2 ⁇ OFDM symbols.
- a transmitted signal is described by one or more resource grids consisting of N RB ⁇ N sc RB subcarriers and 2 ⁇ N symb ( ⁇ ) OFDM symbols.
- N RB ⁇ ⁇ N RB max, ⁇ The N RB max, ⁇ represents the maximum transmission bandwidth, which may vary not only between numerologies but also between uplink and downlink.
- one resource grid may be set for each ⁇ and antenna port p.
- Each element of the resource grid for ⁇ and antenna port p is referred to as a resource element and is uniquely identified by an index pair (k, l').
- l' 0,...,2 ⁇ N symb ( ⁇ ) -1 is a symbol in a subframe indicates the location of
- an index pair (k, l) is used.
- l 0,...,N symb ⁇ -1.
- the resource element (k,l') for ⁇ and antenna port p corresponds to a complex value a k,l' (p, ⁇ ) .
- indices p and ⁇ may be dropped, resulting in a complex value of a k,l' (p) or It can be a k,l' .
- Point A serves as a common reference point of the resource block grid and is obtained as follows.
- OffsetToPointA for primary cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SS/PBCH block used by the UE for initial cell selection. It is expressed in resource block units assuming a 15 kHz subcarrier spacing for FR1 and a 60 kHz subcarrier spacing for FR2.
- -absoluteFrequencyPointA represents the frequency-position of point A expressed as in ARFCN (absolute radio-frequency channel number).
- Common resource blocks are numbered upward from 0 in the frequency domain for the subcarrier spacing ⁇ .
- the center of subcarrier 0 of common resource block 0 for subcarrier spacing setting ⁇ coincides with 'point A'.
- the relationship between the common resource block number n CRB ⁇ and the resource elements (k, l) for the subcarrier spacing ⁇ is given by Equation 1 below.
- Physical resource blocks are numbered from 0 to N BWP,i size, ⁇ -1 within a bandwidth part (BWP), where i is the number of BWP.
- BWP bandwidth part
- Equation 2 The relationship between the physical resource block n PRB and the common resource block n CRB in BWP i is given by Equation 2 below.
- N BWP,i start, ⁇ is a common resource block where BWP starts relative to common resource block 0.
- Figure 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied.
- Figure 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.
- a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot includes 6 symbols.
- a carrier includes a plurality of subcarriers in the frequency domain.
- a resource block (RB) is defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
- a bandwidth part (BWP) is defined as a plurality of contiguous (physical) resource blocks in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.).
- a carrier may include up to N (eg, 5) BWPs. Data communication is performed through an activated BWP, and only one BWP can be activated for one terminal.
- Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
- RE resource element
- the NR system can support up to 400 MHz per component carrier (CC). If a terminal operating in such a wideband CC always operates with radio frequency (RF) chips for the entire CC turned on, battery consumption of the terminal may increase.
- a terminal operating in such a wideband CC always operates with radio frequency (RF) chips for the entire CC turned on, battery consumption of the terminal may increase.
- RF radio frequency
- different numerologies eg subcarrier spacing, etc.
- the capability for the maximum bandwidth may be different for each terminal.
- the base station may instruct the terminal to operate only in a part of the bandwidth rather than the entire bandwidth of the wideband CC, and the part of the bandwidth is defined as a bandwidth part (BWP) for convenience.
- BWP may be composed of consecutive RBs on the frequency axis and may correspond to one numerology (eg, subcarrier spacing, CP length, slot/mini-slot period).
- the base station may set multiple BWPs even within one CC configured for the terminal. For example, in a PDCCH monitoring slot, a BWP occupying a relatively small frequency domain may be set, and a PDSCH indicated by the PDCCH may be scheduled on a larger BWP. Alternatively, when UEs are concentrated in a specific BWP, some UEs may be set to other BWPs for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between neighboring cells, some of the spectrum among the entire bandwidth may be excluded and both BWPs may be configured even within the same slot. That is, the base station may configure at least one DL/UL BWP for a terminal associated with a wideband CC.
- the base station may activate at least one DL/UL BWP among the configured DL/UL BWP(s) at a specific time (by L1 signaling or MAC Control Element (CE) or RRC signaling).
- the base station may indicate switching to another configured DL / UL BWP (by L1 signaling or MAC CE or RRC signaling).
- a timer value expires based on a timer, it may be switched to a predetermined DL/UL BWP.
- the activated DL/UL BWP is defined as an active DL/UL BWP.
- the terminal In situations such as when the terminal is performing an initial access process or before an RRC connection is set up, it may not be possible to receive the configuration for DL / UL BWP, so in this situation, the terminal This assumed DL/UL BWP is defined as the first active DL/UL BWP.
- FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
- a terminal receives information from a base station through downlink, and the terminal transmits information to the base station through uplink.
- Information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type/use of the information transmitted and received by the base station and the terminal.
- the terminal When the terminal is turned on or newly enters a cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S601). To this end, the terminal synchronizes with the base station by receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, and obtains information such as a cell identifier (ID: Identifier). can Thereafter, the UE may acquire intra-cell broadcast information by receiving a Physical Broadcast Channel (PBCH) from the base station. Meanwhile, the terminal may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell search step.
- PSS primary synchronization signal
- SSS secondary synchronization signal
- ID cell identifier
- the UE may acquire intra-cell broadcast information by receiving a Physical Broadcast Channel (PBCH) from the base station.
- PBCH Physical Broadcast Channel
- the terminal may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell
- the UE After completing the initial cell search, the UE acquires more detailed system information by receiving a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH) according to information carried on the PDCCH. It can (S602).
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Control Channel
- the terminal may perform a random access procedure (RACH) to the base station (steps S603 to S606).
- RACH random access procedure
- the terminal may transmit a specific sequence as a preamble through a physical random access channel (PRACH) (S603 and S605), and receive a response message to the preamble through a PDCCH and a corresponding PDSCH ( S604 and S606).
- PRACH physical random access channel
- a contention resolution procedure may be additionally performed.
- the UE receives PDCCH/PDSCH as a general uplink/downlink signal transmission procedure (S607) and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH: Physical Uplink Control Channel) transmission (S608) may be performed.
- the terminal receives downlink control information (DCI) through the PDCCH.
- DCI downlink control information
- the DCI includes control information such as resource allocation information for a terminal, and has different formats depending on its purpose of use.
- the control information that the terminal transmits to the base station through the uplink or the terminal receives from the base station is a downlink / uplink ACK / NACK (Acknowledgement / Non-Acknowledgement) signal, CQI (Channel Quality Indicator), PMI (Precoding Matrix) Indicator), RI (Rank Indicator), etc.
- a terminal may transmit control information such as the above-described CQI/PMI/RI through PUSCH and/or PUCCH.
- Table 5 shows an example of a DCI format in the NR system.
- DCI format uses 0_0 Scheduling of PUSCH in one cell 0_1 Scheduling of one or multiple PUSCHs in one cell, or indication of cell group (CG) downlink feedback information to the UE 0_2 Scheduling of PUSCH in one cell 1_0 Scheduling of PDSCH in one DL cell 1_1 Scheduling of PDSCH in one cell 1_2 Scheduling of PDSCH in one cell
- DCI formats 0_0, 0_1, and 0_2 are resource information related to PUSCH scheduling (eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), transport block ( TB: Transport Block) related information (eg, MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), HARQ (Hybrid - Automatic Repeat and request) related information (eg, , process number, downlink assignment index (DAI), PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, DMRS sequence initialization information, antenna port, CSI request, etc.), power control information (eg, PUSCH power control, etc.), and control information included in each DCI format may be predefined.
- PUSCH scheduling eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.
- DCI format 0_0 is used for PUSCH scheduling in one cell.
- Information included in DCI format 0_0 is a cyclic redundancy check (CRC) by C-RNTI (Cell RNTI: Cell Radio Network Temporary Identifier), CS-RNTI (Configured Scheduling RNTI) or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI) ) is scrambled and transmitted.
- CRC cyclic redundancy check
- C-RNTI Cell RNTI: Cell Radio Network Temporary Identifier
- CS-RNTI Configured Scheduling RNTI
- MCS-C-RNTI Modulation Coding Scheme Cell RNTI
- DCI format 0_1 is used to instruct the UE to schedule one or more PUSCHs in one cell or configured grant (CG: configure grant) downlink feedback information.
- Information included in DCI format 0_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI (Semi-Persistent CSI RNTI) or MCS-C-RNTI.
- DCI format 0_2 is used for PUSCH scheduling in one cell.
- Information included in DCI format 0_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI or MCS-C-RNTI.
- DCI formats 1_0, 1_1, and 1_2 are resource information related to PDSCH scheduling (eg, frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.), transport block (TB) related information (eg, MCS, NDI, RV, etc.), HARQ related information (eg, process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, antenna port , transmission configuration indicator (TCI), sounding reference signal (SRS) request, etc.), PUCCH-related information (eg, PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format can be predefined.
- PDSCH scheduling eg, frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.
- transport block (TB) related information eg, MCS, NDI, RV, etc.
- HARQ related information
- DCI format 1_0 is used for PDSCH scheduling in one DL cell.
- Information included in DCI format 1_0 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
- DCI format 1_1 is used for PDSCH scheduling in one cell.
- Information included in DCI format 1_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
- DCI format 1_2 is used for PDSCH scheduling in one cell.
- Information included in DCI format 1_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI.
- An antenna port is defined such that the channel on which a symbol on an antenna port is carried can be inferred from the channel on which other symbols on the same antenna port are carried. If the properties of a channel on which a symbol on one antenna port is carried can be inferred from a channel on which a symbol on another antenna port is carried, the two antenna ports are quasi co-located or quasi co-location (QC/QCL). ) can be said to be related.
- QC/QCL quasi co-location
- the channel characteristics include delay spread, Doppler spread, frequency/Doppler shift, average received power, and received timing/average delay. delay) and a spatial Rx parameter.
- the spatial Rx parameter means a spatial (reception) channel characteristic parameter such as an angle of arrival.
- a list of up to M TCI-State settings in the upper layer parameter PDSCH-Config can be configured.
- the M depends on UE capabilities.
- Each TCI-State includes parameters for configuring a quasi co-location relationship between one or two DL reference signals and the DM-RS port of the PDSCH.
- Quasi co-location relationship is set by upper layer parameter qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS.
- qcl-Type1 for the first DL RS
- qcl-Type2 if set for the second DL RS.
- the QCL type is not the same.
- the quasi co-location type corresponding to each DL RS is given by the higher layer parameter qcl-Type of QCL-Info, and can take one of the following values:
- the corresponding NZP CSI-RS antenna port(s) is a specific TRS in terms of QCL-Type A and a specific SSB in terms of QCL-Type D. and QCL can be indicated / set.
- the UE receiving this instruction/configuration receives the NZP CSI-RS using the Doppler and delay values measured in the QCL-TypeA TRS, and applies the reception beam used for QCL-TypeD SSB reception to the corresponding NZP CSI-RS reception. can do.
- the UE may receive an activation command by MAC CE signaling used to map up to 8 TCI states to the codepoint of the DCI field 'Transmission Configuration Indication'.
- CoMP Coordinated Multi Point
- a plurality of base stations exchange channel information (eg, RI/CQI/PMI/layer indicator (LI)) received as feedback from a terminal (eg, It refers to a method of effectively controlling interference by cooperatively transmitting to a terminal by using or utilizing the X2 interface.
- CoMP includes joint transmission (JT), coordinated scheduling (CS), coordinated beamforming (CB), dynamic point selection (DPS), and dynamic point blocking ( DPB: Dynamic Point Blocking).
- the M-TRP transmission method in which M TRPs transmit data to one terminal is largely divided into i) eMBB M-TRP transmission, which is a method for increasing the transmission rate, and ii) URLLC M, which is a method for increasing the reception success rate and reducing latency. It can be classified as -TRP transmission.
- the M-TRP transmission method is i) multiple DCI (M-DCI) based M-TRP transmission in which each TRP transmits a different DCI and ii) S-DCI in which one TRP transmits DCI (single DCI) based M-TRP transmission.
- M-DCI multiple DCI
- S-DCI single DCI
- the UE recognizes the PUSCH (or PUCCH) scheduled by the DCI received with different control resource sets (CORESETs) (or CORESETs belonging to different CORESET groups) as PUSCHs (or PUCCHs) transmitted with different TRPs. or can be recognized as PDSCH (or PDCCH) of different TRPs.
- CORESETs control resource sets
- PDSCH or PDCCH
- a scheme for UL transmission eg, PUSCH/PUCCH
- UL transmission eg, PUSCH/PUCCH
- the CORESET group identifier (group ID) described/mentioned in the present disclosure may mean an index/identification information (eg, ID) for distinguishing CORESETs for each TRP/panel.
- the CORESET group may be a group/union of CORESETs classified by an index/identification information (eg, ID)/the CORESET group ID for distinguishing CORESETs for each TRP/panel.
- the CORESET group ID may be specific index information defined in CORSET configuration.
- the CORESET group can be set/instructed/defined by an index defined in the CORESET configuration for each CORESET.
- the CORESET group ID may mean an index/identification information/indicator for classifying/identifying between CORESETs set/related to each TRP/panel.
- the CORESET group ID described/mentioned in the present disclosure may be expressed by being replaced with a specific index/specific identification information/specific indicator for distinguishing/identifying between CORESETs set/related to each TRP/panel.
- the CORESET group ID that is, a specific index/specific identification information/specific indicator for distinguishing/identifying between CORESETs set in/associated with each TRP/panel, is higher layer signaling (eg, RRC signaling)/second It may be set/instructed to the UE through layer signaling (L2 signaling, eg, MAC-CE)/first layer signaling (L1 signaling, eg, DCI).
- L2 signaling eg, MAC-CE
- L1 signaling eg, DCI
- PDCCH detection may be performed for each TRP/panel (ie, for each TRP/panel belonging to the same CORESET group) in units of a corresponding CORESET group.
- Uplink control information eg, CSI, HARQ-A / N (ACK / NACK), SR (for example, CSI, HARQ-A / N (ACK / NACK), SR (for each TRP / panel belonging to the same CORESET group) for each TRP / panel per CORESET group)) scheduling request
- uplink physical channel resources eg, PUCCH/PRACH/SRS resources
- a ControlResourceSet information element which is a higher layer parameter, is used to set a time/frequency control resource set (CORESET).
- the control resource set (CORESET) may be related to detection and reception of downlink control information.
- the ControlResourceSet IE is a CORESET related ID (eg, controlResourceSetID) / index of a CORESET pool for CORESET (eg, CORESETPoolIndex) / time / frequency resource setting of CORESET / TCI information related to CORESET, etc. can include
- the index of the CORESET pool (eg, CORESETPoolIndex) may be set to 0 or 1.
- the CORESET group may correspond to a CORESET pool
- the CORESET group ID may correspond to a CORESET pool index (eg, CORESETPoolIndex).
- the following two methods can be considered as transmission/reception methods for improving reliability using transmission in multiple TRPs.
- FIG. 7 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
- the layer group may mean one or a predetermined layer set composed of one or more layers.
- the amount of transmission resources increases due to the number of layers, and through this, there is an advantage that robust channel coding of a low code rate can be used for TB, and also, since the channels are different from multiple TRPs, diversity ), the reliability of the received signal can be expected to be improved based on the gain.
- FIG. 7(b) an example of transmitting different CWs through layer groups corresponding to different TRPs is shown.
- TBs corresponding to CW #1 and CW #2 in the figure are the same. That is, CW #1 and CW #2 mean that the same TB is converted into different CWs through channel coding or the like by different TRPs. Therefore, it can be regarded as an example of repeated transmission of the same TB.
- a code rate corresponding to TB may be higher than that of FIG. 7(a).
- the code rate can be adjusted by indicating different RV (redundancy version) values for the encoded bits generated from the same TB, or the modulation order of each CW can be adjusted. has the advantage of being
- the same TB is repeatedly transmitted through different layer groups, and as each layer group is transmitted by different TRP / panel, the terminal receives data can increase your odds.
- This is referred to as a Spatial Division Multiplexing (SDM) based M-TRP URLLC transmission scheme.
- SDM Spatial Division Multiplexing
- Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS CDM groups.
- Multi-TRP scheduled by at least one DCI, may be performed as follows:
- Each transmission occasion is one layer or set of layers of the same TB, and each layer or set of layers is associated with one TCI and one set of DMRS port (s).
- a single codeword with one redundancy version (RV) is used for all layers or layer sets. From the UE point of view, different coded bits are mapped to different layers or layer sets with specific mapping rules.
- Each transmission occasion is one layer or set of layers of the same TB, and each layer or set of layers is associated with one TCI and one set of DMRS port (s).
- a single codeword with one RV is used for each spatial layer or set of layers. RVs corresponding to each spatial layer or layer set may be the same or different.
- Each transmission occasion is one layer of the same TB with one DMRS port associated with multiple TCI state indexes, or the same with multiple DMRS ports associated with multiple TCI indexes one by one It is one layer of TB.
- n (n is a natural number) TCI states in a single slot in non-overlapping frequency resource allocation. Each non-overlapping frequency resource allocation is associated with one TCI state. The same single/multiple DMRS port(s) are associated with all non-overlapping frequency resource allocations.
- a single codeword with one RV is used for each non-overlapping frequency resource allocation.
- RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.
- TDM Technique 3
- n (n is a natural number) TCI states in a single slot in non-overlapping time resource allocation.
- Each transmission occasion of a TB has one TCI and one RV in the time granularity of a mini-slot. All transmission occasion(s) within a slot use a common MCS with the same single or multiple DMRS port(s). RV/TCI status may be the same or different among transmission occasions.
- TDM Technique 4
- DL MTRP-URLLC uses the same data (eg, transport block (TB) / DCI with different layer / time / frequency resources of M-TRP)
- TRP 1 transmits the same data/DCI in resource 1
- TRP 2 transmits the same data/DCI in resource 2.
- a UE configured with the DL MTRP-URLLC transmission method uses a different layer Receives the same data/DCI using /time/frequency resources
- the UE determines which QCL RS/type (i.e., DL TCI state) should be used in the layer/time/frequency resources receiving the same data/DCI.
- the DL TCI state used in resource 1 and the DL TCI state used in resource 2 are indicated. High reliability can be achieved because it is received through resource 1 and resource 2.
- Such DL MTRP URLLC can be applied to PDSCH/PDCCH.
- UL MTRP-URLLC means that the M-TRP receives the same data/UCI from one UE using different layer/time/frequency resources.
- TRP 1 receives the same data/UCI from the UE in resource 1
- TRP 2 receives the same data/UCI from the UE in resource 2, and then shares the received data/UCI through the backhaul link between the TRPs.
- the UE configured for the UL MTRP-URLLC transmission method transmits the same data/UCI using different layer/time/frequency resources.
- the UE is instructed by the base station which Tx beam and which Tx power (ie, UL TCI state) to use in layer/time/frequency resources transmitting the same data/UCI.
- the UL TCI state used in resource 1 and the UL TCI state used in resource 2 are indicated.
- Such UL MTRP URLLC may be applied to PUSCH/PUCCH.
- the meaning of using (/ mapping) a specific TCI state (or TCI) when receiving data / DCI / UCI for a certain frequency / time / space resource may mean that a channel is estimated from the DMRS using the QCL type and QCL RS indicated by the corresponding TCI state in time/space resources, and data/DCI is received/demodulated through the estimated channel.
- DL it may mean that DMRS and data/UCI are transmitted/modulated using Tx beam and/or Tx power indicated by the corresponding TCI state in the frequency/time/space resource.
- the UL TCI state contains Tx beam and/or Tx power information of the UE, and may be set to the UE through other parameters such as spatial relation info instead of the TCI state.
- the UL TCI state may be directly indicated in the UL grant DCI or may mean spatial relation info of the SRS resource indicated through the SRS resource indicator (SRI) field of the UL grant DCI.
- SRI SRS resource indicator
- an open loop (OL) Tx power control parameter (j: open loop parameters Po and alpha (up to 32 parameter value sets per cell) linked to the value indicated through the SRI field of the UL grant DCI index for, q_d: index of DL RS for pathloss (PL) measurement (up to 3 measurements per cell), l: closed loop power control process index (up to 2 processes per cell) )) can mean.
- MTRP-eMBB means that M-TRP transmits different data using different layers/times/frequency.
- a UE configured with MTRP-eMBB transmission method is instructed with DCI to various TCI states and QCL RS of each TCI state. It is assumed that data received by using is different data.
- the UE can determine whether MTRP URLLC transmission/reception or MTRP eMBB transmission/reception is performed by separately using the RNTI for MTRP-URLLC and RNTI for MTRP-eMBB. That is, when the CRC of DCI is masked using the RNTI for URLLC, it is recognized as URLLC transmission, and when the CRC of DCI is masked using the RNTI for eMBB, it is recognized as eMBB transmission.
- the base station may configure MTRP URLLC transmission/reception or MTRP eMBB transmission/reception to the UE through other new signaling.
- the present disclosure applied the proposed method assuming cooperative transmission/reception between 2 TRPs for convenience of explanation, it can be extended and applied to a multi-TPS environment of 3 or more, and can also be extended and applied to a multi-panel environment.
- Different TRPs may be recognized by the UE as different TCI (Transmission Configuration Indication) states. That is, when the UE receives/transmits data/DCI/UCI using TCI state 1, it means that data/DCI/UCI is received/transmitted from/to TRP 1.
- TCI Transmission Configuration Indication
- the proposals of the present disclosure can be used in a situation where the MTRP cooperatively transmits the PDCCH (repeatedly transmits the same PDCCH or divides the transmission), and some proposals are also utilized in a situation where the MTRP cooperatively transmits the PDSCH or cooperatively receives the PUSCH/PUCCH. It can be.
- the meaning that multiple base stations (ie, MTRPs) repeatedly transmit the same PDCCH may mean that the same DCI is transmitted through multiple PDCCH candidates, and the same as the meaning that multiple base stations repeatedly transmit the same DCI. do.
- the same DCI may mean two DCIs having the same DCI format/size/payload. Alternatively, even if the payloads of the two DCIs are different, if the scheduling result is the same, it may be referred to as the same DCI.
- slot/symbol position of data and slot/symbol position of ACK (acknowledgement)/NACK (non-acknowledgement) based on DCI reception time by DCI's TDRA time domain resource allocation) field is relatively determined.
- the DCI received at time n and the DCI received at time n+1 inform the UE of the same scheduling result, the TDRA fields of the two DCIs are different and consequently the DCI payloads are different.
- the repetition number R may be directly instructed by the base station to the UE or mutually promised.
- the scheduling result of one DCI is a subset of the scheduling result of the other DCI, it may be referred to as the same DCI.
- the same data is transmitted repeatedly N times through TDM
- DCI 1 received before the first data indicates repetition of N times data
- DCI 2 received after the first data and before the second data indicates N-1 data dictates repetition.
- Scheduling data of DCI 2 is a subset of scheduling data of DCI 1, and since both DCIs are scheduling for the same data, in this case, it can also be said to be the same DCI.
- multiple base stations transmit the same PDCCH by dividing it means that one DCI is transmitted through one PDCCH candidate, but TRP 1 transmits some resources for which the PDCCH candidate is defined and transmits the remaining resources. It means that TRP 2 transmits.
- the PDCCH candidates are PDCCH candidate 1 corresponding to the aggregation level m1 and PDCCH candidate corresponding to the aggregation level m2 Divided by 2, TRP 1 transmits PDCCH candidate 1 and TRP 2 transmits PDCCH candidate 2 through different time/frequency resources.
- the UE After receiving PDCCH candidate 1 and PDCCH candidate 2, the UE generates a PDCCH candidate corresponding to aggregation level m1+m2 and attempts DCI decoding.
- the DCI payload (control information bits + CRC) is encoded through one channel encoder (eg, polar encoder), and the resulting coded bits ) can be transmitted by dividing the two TRPs.
- the entire DCI payload may be encoded in the coded bits transmitted by each TRP or only a part of the DCI payload may be encoded.
- the DCI payload (control information bits + CRC) can be divided into two (DCI 1 and DCI 2) and each can be encoded through a channel encoder (eg, polar encoder). Thereafter, the two TRPs may transmit coded bits corresponding to DCI 1 and coded bits corresponding to DCI 2, respectively.
- multiple base stations ie, MTRPs
- MTRPs multiple base stations dividing/repeating the same PDCCH and transmitting it over multiple monitoring occasions (MOs) may be as follows.
- coded DCI bits encoding the entire DCI contents of the corresponding PDCCH are repeatedly transmitted through each MO for each base station (ie, STRP); or,
- TO means a specific time/frequency resource unit in which the PDCCH is transmitted. For example, if the PDCCH is transmitted multiple times (in a specific resource block (RB)) over slots 1, 2, 3, and 4, TO may mean each slot, and the PDCCH is RB set 1 If the PDCCH is transmitted multiple times over ,2,3,4 (in a specific slot), TO may mean each RB set, or if the PDCCH is transmitted multiple times over different time and frequency, TO represents each time/frequency resource.
- RB resource block
- the TCI state used for DMRS channel estimation can be set differently for each TO, and it can be assumed that the TOs with different TCI states are transmitted by different TRPs/panels.
- the fact that a plurality of base stations repeatedly transmits or divides the PDCCH means that the PDCCH is transmitted over multiple TOs and the union of TCI states set in the corresponding TOs is composed of two or more TCI states. For example, when the PDCCH is transmitted over TO 1,2,3,4, TCI states 1,2,3,4 may be set in each of TO 1,2,3,4, which means that TRP i is TO i It means that the PDCCH was transmitted cooperatively in .
- each TO is UL transmitted toward a specific TRP or DL received from a specific TRP.
- the UL TO transmitted toward TRP 1 refers to two Spatial Relations indicated to the UE, two UL TCIs, two UL power control parameters, and/or two It means TO using the first value of pathloss reference signals (PLRS), and the UL TO (or TO of TRP 2) transmitted toward TRP 2 is two spatial relations indicated to the UE, two This means TO using the second value of two UL TCIs, two UL power control parameters, and/or two PLRSs.
- PLRS pathloss reference signals
- the DL TO transmitted by TRP 1 (or the TO of TRP 1) is one of the two DL TCI states indicated to the UE (for example, when two TCI states are set in CORESET). It means TO using the first value
- the DL TO transmitted by TRP 2 (or the TO of TRP 2) is two of the two DL TCI states indicated to the UE (for example, when two TCI states are set in CORESET) It means TO using the second value.
- the proposal of the present disclosure can be extended and applied to various channels such as PUSCH / PUCCH / PDSCH / PDCCH.
- the proposal of the present disclosure is applicable to both the case of repeatedly transmitting the channel in different time/frequency/spatial resources and the case of dividing and transmitting the channel.
- FIG 8 illustrates a HARQ-ACK process for downlink data in a wireless communication system to which the present disclosure can be applied.
- the terminal may detect PDCCH in slot #n.
- the PDCCH includes downlink scheduling information (eg, DCI formats 1_0 and 1_1), and the PDCCH indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1).
- DCI formats 1_0 and 1_1 may include the following information.
- -Frequency domain resource assignment Indicates RB resources (eg, one or more (dis)continuous RBs) allocated to the PDSCH
- K0 indicating the start position (eg, OFDM symbol index) and length (eg, number of OFDM symbols) of the PDSCH in the slot
- HARQ process ID (Identity) for data (eg, PDSCH, TB)
- - PUCCH resource indicator Indicates a PUCCH resource to be used for UCI transmission among a plurality of PUCCH resources in a PUCCH resource set
- the UE may receive PDSCH in slot #(n+K0) according to the scheduling information of slot #n, and then transmit UCI through PUCCH in slot #(n+K1).
- UCI includes a HARQ-ACK response for PDSCH. If the PDSCH is configured to transmit up to 1 TB, the HARQ-ACK response may consist of 1-bit. When the PDSCH is configured to transmit up to two TBs, the HARQ-ACK response may consist of 2-bits if spatial bundling is not configured and 1-bit if spatial bundling is configured.
- the UCI transmitted in slot #(n+K1) includes HARQ-ACK responses for the plurality of PDSCHs.
- MBMS Multimedia Broadcast/Multicast Service
- 3GPP MBMS is i) a single frequency network (SFN) method in which a plurality of base station cells are synchronized to transmit the same data through a physical multicast channel (PMCH) and ii) within the cell coverage through a PDCCH / PDSCH channel
- SFN single frequency network
- PMCH physical multicast channel
- SC-PTM Single Cell Point To Multipoint
- the SFN method is used to provide broadcast services in a wide area (eg, MBMS area) through semi-statically allocated resources, while the SC-PTM method uses dynamic resources to provide broadcast services. It is mainly used to provide a broadcasting service only within coverage.
- the SC-PTM provides one logical channel, SC-MCCH (Single Cell Multicast Control Channel) and one or more logical channels, SC-MTCH (Single Cell Multicast Traffic Channel). These logical channels are mapped to a downlink shared channel (DL-SCH), which is a transport channel, and a PDSCH, which is a physical channel.
- DL-SCH downlink shared channel
- PDSCH PDSCH
- a PDSCH transmitting SC-MCCH or SC-MTCH data is scheduled through a PDCCH indicated by a group-RNTI (G-RNTI).
- G-RNTI group-RNTI
- TMGI temporary multicast group ID
- ID service identifier
- multiple G-RNTI values may be allocated for SC-PTM transmission.
- One or a plurality of terminals may perform PDCCH monitoring using a specific G-RNTI to receive a specific service.
- a DRX on-duration period may be set exclusively for SC-PTM for a specific service/specific G-RNTI. In this case, the terminals wake up only for a specific on-duration period and perform PDCCH monitoring for the G-RNTI.
- radio resource management Radio resource management
- - SLIV Starting and Length Indicator Value (Indicative value for the starting symbol index and number of symbols in the slot of the PDSCH and / or PUSCH. Scheduling the corresponding PDSCH and / or PUSCH It can be set as a component of an entry constituting a TDRA field in a scheduling PDCCH.)
- BandWidth Part may be composed of continuous resource blocks (RBs) on the frequency axis.
- One numerology eg, SCS, CP length, slot / may correspond to mini-slot duration (slot/mini-slot duration, etc.
- multiple BWPs may be set in one carrier (the number of BWPs per carrier may also be limited), but activated ( The number of activated BWPs may be limited to a part (eg, 1) per carrier.)
- control resource set (CONtrol REsourse SET) (means a time-frequency resource area in which PDCCH can be transmitted, and the number of CORESETs per BWP may be limited.)
- -SFI Slot Format Indicator (an indicator indicating a symbol level DL/UL direction within a specific slot(s), transmitted through a group common PDCCH).
- QCL Quasi-Co-Location
- RS reference signals
- RS Reference Signal
- RS Doppler shift
- Doppler spread and average delay obtained from one RS
- average spread delay spread
- spatial reception parameter Spatial Rx parameter
- QCL parameters can also be applied to other RS (or the antenna port (antenna port (s)) of the corresponding RS))
- QCL types are defined as follows: 'typeA': ⁇ Doppler shift, Doppler spread, average delay, delay spread ⁇ , 'typeB': ⁇ Doppler shift, Doppler spread ⁇ , 'typeC ': ⁇ Doppler shift, average delay ⁇ , 'typeD': ⁇ Spatial Rx parameter ⁇ .
- TCI state is one such as DM-RS ports of PDSCH, DM-RS ports of PDCCH, or CSI-RS port(s) of CSI-RS resources
- TCI state index corresponding to each code point constituting the field
- CE control element
- the TCI state for each TCI state index is set through RRC signaling
- the corresponding TCI state is set between DL RS
- configuration between DL RS and UL RS or between UL RS and UL RS may be allowed.
- UL RS include SRS, PUSCH DM-RS, and PUCCH DM-RS.
- SRS resource indicator (SRS resource indicator) (Indicates one of the SRS resource index values set in 'SRS resource indicator' among fields in DCI scheduling PUSCH.
- SRS resource indicator (Indicates one of the SRS resource index values set in 'SRS resource indicator' among fields in DCI scheduling PUSCH.
- the PUSCH can be transmitted using the same spatial domain transmission filter used for reference signal transmission and reception, where the reference RS is transmitted to RRC signaling through the SRS-SpatialRelationInfo parameter for each SRS resource. It is set by, and SS/PBCH block, CSI-RS, or SRS can be set as reference RS.
- PLMN ID Public Land Mobile Network identifier
- UL-SCH uplink shared channel
- CCCH common control channel
- SDU service data unit
- Special Cell In the case of Dual Connectivity operation, the term Special Cell refers to the MCG's PCell or SCG's PCell depending on whether the MAC entity is related to the MCG (master cell group) or SCG (secondary cell group), respectively. Indicates a PSCell. Otherwise, the term Special Cell refers to PCell. Special Cell supports PUCCH transmission and contention-based random access and is always active.
- PCell PCell, PSCell, SCell (secondary cell).
- Type 1 configured grant
- Type 2 configured grant
- - Fall-back DCI Indicates a DCI format that can be used for fall-back operation, for example, DCI formats 0_0 and 1_0 correspond.
- Non-fall-back DCI Indicates a DCI format other than fall-back DCI, for example, DCI formats 0_1 and 1_1 are applicable.
- frequency domain resource allocation (frequency domain resource allocation)
- time domain resource allocation time domain resource allocation
- A/N acknowledgenowledgement/negative acknowledgment information for data (eg, PDSCH) received from cell A
- One DL CFR provides group common PDCCH and group common PDSCH transmission resources for MBS transmission and reception.
- One UL CFR provides HARQ-ACK PUCCH resources for group common PDSCH reception.
- One CFR is one MBS specific BWP or one UE specific BWP. Alternatively, one or a plurality of CFRs may be set within one UE specific BWP.
- One CFR has a connection relationship with one UE specific BWP.
- TMGI Temporary Mobile Group Identity. As an MBS service identifier, it indicates a specific service.
- G-RNTI Group Radio Network Temporary Identifier. Indicates the terminal group identifier that receives the MBS.
- '/' means 'and', 'or', or 'and/or' depending on the context.
- a base station may configure a terminal-specific SPS configuration for a specific terminal and allocate repeated downlink SPS transmission resources according to a set period.
- the DCI of the terminal-dedicated PDCCH may indicate activation (SPS activation) of a specific SPS configuration index, and accordingly, the corresponding terminal can repeatedly receive SPS transmission resources according to the set cycle.
- SPS transmission resources are used for initial HARQ (hybrid automatic repeat request) transmission, and the base station may allocate retransmission resources of a specific SPS configuration index through the DCI of the terminal-dedicated PDCCH.
- the base station can allocate retransmission resources to DCI so that the terminal can receive downlink retransmission.
- the DCI of the terminal-dedicated PDCCH may indicate deactivation (SPS release or SPS deactivation) of a specific SPS configuration index, and the terminal receiving this does not receive the indicated SPS transmission resource.
- the cyclic redundancy check (CRC) of DCI for activation/retransmission/deactivation of the SPS is scrambled with Configured Scheduling-RNTI (CS-RNTI).
- Rel-17 NR intends to introduce a DL broadcast or DL multicast transmission scheme to support a Multicast Broadcast Service (MBS) service similar to LTE MBMS.
- the base station provides a point-to-multipoint (PTM) transmission method and/or a point-to-point (PTP) transmission method for DL broadcast or DL multicast transmission.
- PTM point-to-multipoint
- PTP point-to-point
- the base station transmits a group common PDCCH and a group common PDSCH to a plurality of terminals, and the plurality of terminals simultaneously transmit the same group common PDCCH and group common PDSCH. It receives and decodes the same MBS data.
- a base station transmits a terminal-only PDCCH and a terminal-only PDSCH to a specific terminal, and only the corresponding terminal receives the terminal-only PDCCH and terminal-only PDSCH.
- the base station separately transmits the same MBS data to individual terminals through different terminal-dedicated PDCCHs and terminal-dedicated PDSCHs. That is, the same MBS data is provided to a plurality of terminals, but different channels (ie, PDCCH, PDCCH) are used for each terminal.
- the base station transmits a plurality of group common PDSCHs to a plurality of terminals.
- the base station can receive the terminal's HARQ-ACK for the group common PDSCH through the terminal-dedicated PUCCH resource from a plurality of terminals.
- a transport block (TB) for multicast PDSCH (or group common PDSCH) is successfully decoded
- the UE transmits ACK as HARQ-ACK information.
- the UE transmits NACK as HARQ-ACK information.
- This HARQ-ACK transmission scheme is referred to as an ACK/NACK based HARQ-ACK scheme (mode).
- a UE may transmit ACK/NACK based HARQ-ACK using UE-dedicated PUCCH resources.
- the UE when a NACK only based HARQ-ACK method (mode) is set for multicast PDSCH (or group common PDSCH), the UE does not transmit PUCCH in case of ACK, and transmits PUCCH only in case of NACK.
- PUCCH is a group common PUCCH resource, and only NACK can be transmitted as HARQ-ACK information.
- a DCI format (or PDCCH) for scheduling PDSCH reception carrying an MBS service may be referred to as an MBS DCI format (or PDCCH) or a multicast DCI format (or PDCCH).
- MBS DCI format or PDCCH
- a DCI format (or PDCCH) including a CRC scrambled by group-RNTI (G-RNTI) or group-configured scheduling-RNTI (G-CS-RNTI) for scheduling PDSCH reception is converted into MBS DCI format ( or PDCCH) or multicast DCI format (or PDCCH).
- the MBS DCI format (or PDCCH) or multicast DCI format (or PDCCH) is a group common DCI format (or PDCCH) according to the PTM scheme for MBS and the PTP scheme for MBS. may include all UE specific DCI formats (or PDCCH) according to
- MBS PDSCH or multicast PDSCH may include both a group common PDSCH according to the PTM scheme for MBS and a UE specific PDSCH according to the PTP scheme for MBS.
- HARQ-ACK information associated with a multicast (or MBS) DCI format (or PDCCH) or multicast PDSCH may be referred to as MBS HARQ-ACK information or multicast HARQ-ACK information.
- MBS HARQ-ACK information or multicast HARQ-ACK information may be transmitted through UE specific PUCCH/PUSCH according to the PTP/PTM scheme, and group common PUCCH/PUSCH according to the PTM scheme. may be transmitted via
- UE-specific PDSCH In addition, unless otherwise stated in the present disclosure (eg, distinction between PDSCH by dynamic scheduling and PDSCH by SPS), PDSCH scheduled by unicast DCI format (or PDCCH) and UE-specific SPS PDSCH unicast / Can be collectively referred to as UE-specific PDSCH.
- the UE when a transport block (TB) for MBS PDSCH or multicast PDSCH is successfully decoded, the UE may transmit ACK as HARQ-ACK information. On the other hand, if the TB for MBS PDSCH or multicast PDSCH is not successfully decoded, the UE may transmit NACK as HARQ-ACK information.
- This HARQ-ACK transmission scheme is referred to as an ACK/NACK based HARQ-ACK scheme (mode).
- the UE may not transmit HARQ-ACK information (ie, ACK) through PUCCH (or PUSCH).
- HARQ-ACK information
- the UE may transmit NACK as HARQ-ACK information.
- This HARQ-ACK transmission scheme is referred to as a NACK-based HARQ-ACK scheme (mode).
- mode NACK-based HARQ-ACK scheme
- the UE does not transmit PUCCH (or PUSCH) in case of ACK, and transmits PUCCH (or PUSCH) only in case of NACK. can be done
- a sub-slot, a mini-slot, and a symbol slot all represent time units smaller than one slot, and unless clearly differentiated and described for each in the present disclosure, all of them can be interpreted in an equivalent sense. Also, all of the above terms may be regarded/interpreted as one or more symbols in a slot.
- FIG 9 illustrates a HARQ-ACK transmission and reception procedure for multicast PDSCH according to an embodiment of the present disclosure.
- FIG. 9(a) illustrates a signaling procedure between UE1 and a base station (gNB) (beam/TRP 1)
- FIG. 9(b) illustrates a signaling procedure between UE2 and a base station (gNB) (beam/TRP 2).
- FIG. 9 (a) illustrates a case without PDSCH retransmission
- FIG. 9 (b) illustrates a case with PDSCH retransmission.
- FIG. 9 for convenience of description two procedures are illustrated together, but the present invention is not limited thereto. That is, UE1 and UE2 are not limited to accessing the same base station (through different beams/TRPs), and are not limited to performing the two procedures together.
- FIGS. 9(a) and 9(b) are separate procedures, they are shown together for convenience of explanation, and common descriptions are described for common steps.
- the UE enters the RRC connected mode (RRC_CONNECTED mode) (before the procedure of FIG. 9), and a message indicating one or more MBS services of interest to the base station / information can be transmitted.
- RRC_CONNECTED mode the RRC connected mode
- the message/information may be transmitted through any one of uplink control information (UCI), MAC control element (CE), and RRC message.
- UCI uplink control information
- CE MAC control element
- RRC message RRC message
- the interested MBS service in the message/information may mean either TMGI or G-RNTI included in the DL message received from the base station.
- the DL message may be a service availability message including TMGI#1, TMGI#3, TMGI#5 and TMGI#10. If the UE is interested in TMGI#5, the UE may indicate the order of TMGI#5 in the message/information. That is, the UE may report '3' to the base station.
- the DL message may be a service availability message including G-RNTI#1, G-RNTI#3, G-RNTI#5 and G-RNTI#10. If the UE is interested in G-RNTI#10, the UE may indicate the order of G-RNTI#10 in the message/information. That is, the UE may report '4' to the base station.
- the base station i) common frequency resource (CFR) configuration, ii) one or more groups including TCI states for one or more G-RNTI value (s) At least one of a common PDSCH configuration and iii) a search space (SS) configuration including a TCI state for one or more G-RNTI value(s) may be transmitted to the UE through an RRC message (S901a, S901b).
- CFR common frequency resource
- SS search space
- RRC message is illustrated in FIG. 9, it is not limited thereto, and settings i) to iii) may be provided to the UE through different (or partially identical) RRC messages.
- the UE may configure one or more group common PDSCH (eg, group common SPS PDSCH) settings according to the RRC message.
- group common PDSCH eg, group common SPS PDSCH
- the RRC message may be a group common message transmitted on a PTM multicast control channel (MCCH) or a UE-specific message transmitted on a UE-specific dedicated control channel (DCCH).
- MCCH PTM multicast control channel
- DCCH UE-specific dedicated control channel
- the UE may be configured with at least a G-RNTI value for each MBS CFR or each serving cell.
- GC-CS-RNTI group common-configured scheduling-RNTI
- GC-CS-RNTI group common-configured scheduling-RNTI
- CS-RNTI can be used.
- the base station may associate a list of TMGIs or a list of G-RNTIs with one GC-CS-RNTI. In this case, the base station may provide the terminal with a list of TMGIs or a list of G-RNTIs associated with the GC-CS-RNTI value.
- Each PDSCH configuration (eg, RRC parameter PDSCH-config) may include at least information elements (IE) for multicast and/or broadcast as shown in Table 6 below.
- IE information elements
- Table 6 illustrates the PDSCH-Config IE used to configure PDSCH parameters.
- PDSCH-Config :: SEQUENCE ⁇ dataScramblingIdentityPDSCH INTEGER (0..1023) OPTIONAL, -- Need S dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease ⁇ DMRS-DownlinkConfig ⁇ OPTIONAL, -- Need M dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease ⁇ DMRS-DownlinkConfig ⁇ OPTIONAL, -- Need M tci-StatesToAddModList SEQUENCE (SIZE(1..maxNrofTCI-States)) OF TCI-State OPTIONAL, -- Need N tci-StatesToReleaseList SEQUENCE (SIZE(1..maxNrofTCI-States)) OF TCI-StateId OPTIONAL, -- Need N vrb-ToPRB-Interleaver ENUMERATED ⁇ n2, n4 ⁇ OPTIONAL, -- Need S resourceAl
- Table 7 illustrates the description of the fields of PDSCH-config of FIG. 6 above.
- the dataScramblingIdentityPDSCH2 is configured if coresetPoolIndex is configured with 1 for at least one CORESET in the same BWP.
- mapping type A and B Only the fields dmrs-Type, dmrs-AdditionalPosition and maxLength may be set differently for mapping type A and B.
- the field dmrs-DownlinkForPDSCH-MappingTypeA applies to DCI format 1_1 and the field dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2 applies to DCI format 1_2.
- mapping type A and B Only the fields dmrs-Type, dmrs-AdditionalPosition and maxLength may be set differently for mapping type A and B.
- the field dmrs-DownlinkForPDSCH-MappingTypeB applies to DCI format 1_1 and the field dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2 applies to DCI format 1_2.
- the UE applies the value 64QAM.
- the field mcs-Table applies to DCI format 1_0 and DCI format 1_1, and the field mcs-TableDCI-1-2 applies to DCI format 1_2.
- the UE applies the value 1.
- pdsch-TimeDomainAllocationList, pdsch-TimeDomainAllocationListDCI-1-2List of time-domain configurations for timing of DL assignment to DL data.
- the field pdsch-TimeDomainAllocationList (with or without suffix) applies to DCI format 1_0 and DCI format 1_1, and if the field pdsch-TimeDomainAllocationListDCI-1-2 is not configured, to DCI format 1_2. If the field pdsch-TimeDomainAllocationListDCI-1-2 is configured, it applies to DCI format 1_2.
- the network does not configure the pdsch-TimeDomainAllocationList-r16 simultaneously with the pdsch-TimeDomainAllocationList (without suffix) in the same PDSCH-Config.
- rateMatchPatternGroup1, rateMatchPatternGroup1DCI-1-2 The IDs of a first group of RateMatchPatterns defined in PDSCH-Config->rateMatchPatternToAddModList (BWP level) or in ServingCellConfig ->rateMatchPatternToAddModList (cell level). These patterns can be activated dynamically by DCI.
- the field rateMatchPatternGroup1 applies to DCI format 1_1, and the field rateMatchPatternGroup1DCI-1-2 applies to DCI format 1_2.
- rateMatchPatternGroup2 rateMatchPatternGroup2DCI-1-2
- BWP level bandwidth-Config->rateMatchPatternToAddModList
- Cell level bandwidth-toAddModList
- the field rateMatchPatternGroup2 applies to DCI format 1_1
- the field rateMatchPatternGroup2DCI-1-2 applies to DCI format 1_2.
- rateMatchPatternToAddModListResources which the UE should rate match PDSCH around. The UE rate matches around the union of all resources indicated in the rate match patterns.
- resourceAllocationType1 ResourceAllocationType1GranularityDCI-1-2Configure the scheduling granularity applicable for both the starting point and length indication for resource allocation type 1 in DCI format 1_2. If this field is absent, the granularity is 1 PRB.
- TCI Transmission Configuration Indicator
- vrb-ToPRB-Interleaver, vrb-ToPRB-InterleaverDCI-1-2Interleaving unit configurable between 2 and 4 PRBs. When the field is absent, the UE performs non-interleaved VRB-to-PRB mapping.
- the UE monitors the PDCCH on the SS configured in the configured CFR to receive the DCI scrambled with the CRC G-RNTI or G-CS-RNTI (S902a, S902b ).
- the base station If the data unit is available in the Multicast Traffic Channel (MTCH) of the MBS radio bearer (MRB) for the MBS service, the base station according to service-to-resource mapping , i) associated with the MTCH of the MRB for the MBS service, or ii) associated with the TMGI of the MBS service, or iii) associated with the short ID of the MBS service, or iv) associated with the G-RNTI mapped to the MBS service, A transport block (TB) including a data unit for an SPS PDSCH occasion is constructed and transmitted.
- MTCH Multicast Traffic Channel
- MBS radio bearer MBS radio bearer
- the base station transmits DCI to the UE on the PDCCH (S903a, S903b).
- the CRC of the DCI may be scrambled by G-RNTI, G-CS-RNTI or CS-RNTI.
- the PDCCH may be a group common PDCCH or a UE specific PDCCH.
- the DCI may include the following information (fields).
- This information may indicate either an MBS-specific DCI format or one of the existing DCI formats for MBS.
- This information (field) indicates the (serving or MBS-specific) cell of the CFR through which the group common PDCCH / PDSCH is transmitted or the serving cell of the active BWP of the UE associated with the CFR.
- This information indicates the BWP ID assigned to the CFR through which the group common PDCCH/PDSCH is transmitted or the BWP ID of the active BWP of the UE associated with the CFR.
- the DCI includes frequency domain resource assignment, time domain resource assignment, VRB-to-PRB mapping, PRB bundling size indicator , rate matching indicator, ZP CSI-RS trigger, modulation and coding scheme, new data indicator (NDI: New data indicator), redundancy version ), HARQ process number, downlink assignment index, transmit power control (TPC) command for scheduled PUCCH, PUCCH resource indicator (PRI) : PUCCH resource indicator), HARQ feedback timing indicator for PDSCH (PDSCH-to-HARQ_feedback timing indicator), antenna port (s) (Antenna port (s)), transmission configuration indication (TCI: Transmission configuration indication), SRS request ( SRS request), DMRS sequence initialization, and priority indicator information.
- TPC transmit power control
- the base station identifies i) by a group common or UE-specific RRC message or ii) by a group common or UE-specific MAC CE, by TMGI or G-RNTI or GC-CS-RNTI
- MBS radio bearer MBS radio bearer
- the RRC message may be a group common message transmitted through a PTM Multicast Control Channel (MCCH) or a UE-specific message transmitted through a UE-specific Dedicated Control Channel (DCCH).
- the DCI scheduling the PDSCH carrying MBS service data may also indicate one or more of a short ID, MTCH ID, MRB ID, G-RNTI value, and TMGI value for MBS service.
- the UE receives a DCI in which the CRC is scrambled by the G-RNTI that the UE is interested in receiving, i) mapping between MBS services and the HARQ process number (HPN) indicated in the DCI and/or ii ) (if available) based on the mapping between MBS services and the short ID (s) indicated in the DCI, the UE short ID, MTCH ID, MRB ID, G-RNTI value and TMGI for each PDSCH opportunity One or more of the values may determine the associated MBS service.
- the base station transmits a PDSCH carrying corresponding MBS service data to the UE (S904a, S904b) (in FIG. s), PDSCH transmission scheduled by DCI can be received (S905a, S905b).
- the UE may not receive PDSCH transmission scheduled by DCI.
- the UE transmits HARQ feedback to the base station.
- the UE may transmit the HARQ-ACK to the base station through the PUCCH after receiving the PDSCH scheduled by the DCI as follows (S906a) .
- group common DCI may indicate a single PUCCH resource indicator (PRI) and a single PDSCH-to-HARQ_feedback timing indicator (K1) for at least ACK/NACK based HARQ-ACK.
- PRI PUCCH resource indicator
- K1 PDSCH-to-HARQ_feedback timing indicator
- UE-specific PUCCH resource allocation for ACK/NACK based HARQ-ACK for group common DCI different UEs in the group are for multicast or unicast (when PUCCH-config for multicast is not set)
- Different values of at least PUCCH resources and candidate DL data-UL ACK eg, dl-DataToUL-ACK
- PUCCH-config Different values of at least PUCCH resources and candidate DL data-UL ACK (eg, dl-DataToUL-ACK) may be set within the UE-specific PUCCH configuration (eg, PUCCH-config).
- Different PUCCH resources may be allocated to different UEs by the same PUCCH resource indicator (PRI) of group common DCI and the same PDSCH-to-HARQ_feedback timing indicator (K1).
- PRI PUCCH resource indicator
- K1 PDSCH-to-HARQ_feedback timing indicator
- PUCCH resource indicator (PRI) and PDSCH-to-HARQ_feedback timing indicator (K1) in UE-specific DCI are unicast regardless of whether PUCCH configuration for multicast (eg, PUCCH-config) is configured. It can be interpreted based on the PUCCH configuration (eg, PUCCH-config) for.
- D. PRI PUCCH Resource Indicator
- group common DCI may be indicated by group common DCI as follows.
- Option 1A-1 A list of UE specific PRIs may be included in DCI.
- Each PRI in the list is a candidate PUCCH resource ID (eg, pucch- You can indicate an entry corresponding to the ResourceId value.
- Other PRIs of DCI may indicate other items in PUCCH configuration (eg, PUCCH-config).
- the candidate PUCCH resource ID (eg, pucch-ResourceId) value is set by a higher layer (eg, RRC), and is configured by at least a multicast PUCCH configuration (eg, PUCCH-config) to other UEs in the same group.
- a different PUCCH resource ID (eg, pucch-ResourceId) value may be set for
- Option 1A-2 group common PRI may be included in DCI.
- a single group common PRI is assigned to a candidate PUCCH resource ID (eg, pucch-ResourceId) value in UE specific PUCCH configuration (eg, PUCCH-config) for the same or different PUCCH resource allocation for all UEs in the group. You can indicate the corresponding entry for a candidate PUCCH resource ID (eg, pucch-ResourceId) value in UE specific PUCCH configuration (eg, PUCCH-config) for the same or different PUCCH resource allocation for all UEs in the group. You can indicate the corresponding entry for
- the candidate PUCCH resource ID (eg, pucch-ResourceId) value is set by a higher layer (eg, RRC), and at least in the PUCCH configuration for multicast (eg, PUCCH-config), another member of the same group
- a different PUCCH resource ID (eg, pucch-ResourceId) value may be configured for the UE.
- PUCCH configuration for multicast (eg, PUCCH-config) is configured for HARQ-ACK for a group common PDSCH scheduled by group common DCI
- the UE determines that the PRI of group common DCI is PUCCH configuration for multicast ( For example, it may be assumed that PUCCH-config) indicates a corresponding entry for a candidate PUCCH resource ID (pucch-ResourceId) value. That is, the PRI value of group common DCI may be interpreted based on PUCCH configuration (eg, PUCCH-config) for multicast.
- the UE determines that the PRI of the group common DCI is unicast It may be assumed that a corresponding entry for a candidate PUCCH resource ID (pucch-ResourceId) value is indicated in PUCCH configuration (eg, PUCCH-config) for That is, the PRI value of group common DCI may be interpreted based on PUCCH configuration (eg, PUCCH-config) for unicast.
- PUCCH configuration for multicast eg, PUCCH-config
- E. K1 (PDSCH-to-HARQ_feedback timing indicator) may be indicated by group common DCI as follows.
- Option 1B-1 A list of UE specific K1 values may be included in DCI.
- Each K1 in the list may indicate the same UL slot or a different UL (sub)slot for other UEs in the group.
- K1 values may be assigned to different UEs. For example, K1-UE1, K2-UE2, K3-UE3,...
- the K1 value may be shared by multiple UEs (eg, K1-UE1/UE2, K2-UE3/UE4).
- one K1 value may be a reference and another K1 value may be assigned based on the reference.
- a list of ⁇ K1_ref, K1_offset (offset from reference) ⁇ may be indicated in DCI.
- UE1 may use K1_ref
- UE2 may use K1_ref + K1_offest
- UE3 may use K1_ref + K1_offest2.
- Option 1B-2 A group common K1 value may be included in DCI.
- a single K1 value is a candidate DL data-UL ACK value (eg, dl -DataToUL-ACK) can be indicated. This may be applied when the DCI format of DCI is configured in the UE specific PUCCH configuration (eg, PUCCH-config) for the K1 value.
- PUCCH-config UE specific PUCCH configuration
- the candidate DL data-UL ACK value (eg, dl-DataToUL-ACK) is set by a higher layer (eg, RRC), and at least in the PUCCH configuration for multicast (eg, PUCCH-config) It can be different for different UEs in the same group.
- PUCCH configuration for multicast (eg, PUCCH-config) is configured for HARQ-ACK for a group common PDSCH scheduled by group common DCI
- the UE determines that the K1 value of group common DCI is PUCCH configuration for multicast It can be assumed that (eg, PUCCH-config) indicates a corresponding entry for a candidate DL data-UL ACK value (eg, dl-DataToUL-ACK). That is, the K1 value of group common DCI may be interpreted based on PUCCH configuration (eg, PUCCH-config) for multicast.
- the UE has the K1 value of the group common DCI
- a corresponding entry for a candidate DL data-UL ACK value (eg, dl-DataToUL-ACK) is indicated in PUCCH configuration (eg, PUCCH-config) for unicast. That is, the K1 value of group common DCI may be interpreted based on PUCCH configuration (eg, PUCCH-config) for unicast.
- the UE when receiving group common DCI whose CRC is scrambled by G-RNTI and/or UE specific DCI whose CRC is scrambled by C-RNTI, PUCCH-config for multicast and/or PUCCH-config for unicast
- the UE configures Time Domain Resource Allocation (TDRA) to perform HARQ for the group common PDSCH scheduled by the group common DCI and/or the UE specific PDSCH scheduled by the UE specfici DCI.
- TDRA Time Domain Resource Allocation
- -A type 1 HARQ-ACK codebook for ACK (s) may be generated.
- the UE may transmit HARQ NACK to the base station on the PUCCH resource in the configured UL CFR (S906b).
- the UE may also transmit HARQ-ACK for other PDSCH transmissions such as unicast SPS PDSCH, dynamic unicast PDSCH, PTP retransmission and/or dynamic group common PDSCH.
- HARQ-ACK for other PDSCH transmissions such as unicast SPS PDSCH, dynamic unicast PDSCH, PTP retransmission and/or dynamic group common PDSCH.
- SPS PDSCH for unicast, dynamically scheduled multicast PDSCH, and/or dynamically scheduled unicast PDSCH
- a codebook can be constructed based on one or more options.
- the UE may use NACK only based HARQ-ACK based on the measured RSRP of the serving cell. For example, if the measured RSRP is higher than (or higher than) the threshold value, NACK only based HARQ-ACK may be transmitted through the group common PUCCH resource indicated by the PRI of DCI. On the other hand, if the measured RSRP is lower than (or less than) the threshold, NACK only based HARQ-ACK is changed to HARQ-ACK based HARQ-ACK, and UE-specific PUCCH resources indicated by PRI of DCI Can be transmitted through there is.
- RSRP reference signal received power
- the TB scheduled by the group common DCI has each PDSCH aggregation factor (pdsch-AggregationFactor ) number of consecutive slots or among each of the repetition number (repeat_number) number of consecutive slots for the Nth HARQ transmission of the TB in each symbol allocation.
- the base station receiving the HARQ NACK in the TCI state may retransmit the PDCCH and PDSCH in the TCI state within the DL CFR configured for TB retransmission.
- the UE may monitor the group common and/or UE-specific PDCCH in the TCI state on the search space configured in the DL CFR to receive the TB retransmission (S907b).
- the base station may retransmit the TB to only one of the UEs in the group by UE-specific PDCCH and other UEs may not receive the retransmission of the TB (eg, because the other UEs successfully received the TB).
- the UE may receive the PDSCH scheduled by the DCI of the PDCCH (S909b, S910b).
- the UE may map between the MBS service indicated by the DCI and HPN (HARQ process number) and/or the MBS service indicated by the DCI and (if available) the short ID(s) ), it can be considered that the decoded TB is associated with the MTCH, MRB, TMGI, G-RNTI and / or short ID of the MBS service.
- the UE may transmit HARQ ACK to the base station through the PUCCH resource in the UL CFR configured according to step 7.
- the UE may transmit HARQ NACK to the base station on PUCCH resources in the configured UL CFR (S911b).
- the UE may also transmit HARQ-ACK for other PDSCH transmissions such as unicast SPS PDSCH, dynamic unicast PDSCH, PTP retransmission and/or dynamic group common PDSCH.
- HARQ-ACK for other PDSCH transmissions such as unicast SPS PDSCH, dynamic unicast PDSCH, PTP retransmission and/or dynamic group common PDSCH.
- SPS PDSCH for unicast, dynamically scheduled multicast PDSCH, and/or dynamically scheduled unicast PDSCH
- a codebook can be constructed based on one or more options.
- FIG. 9 is for convenience of description and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 9 may be omitted depending on circumstances and/or settings.
- the base station and the terminal in FIG. 9 are just one example, and may be implemented as the device illustrated in FIG. 12 below.
- the processor 102/202 of FIG. 12 can control transmission and reception of channels/signals/data/information using the transceiver 106/206, and transmits or receives channels/signals/information. It can also be controlled to store data/information or the like in the memory 104/204.
- a base station may mean a generic term for an object that transmits/receives data with a terminal.
- the base station may be a concept including one or more transmission points (TPs), one or more transmission and reception points (TRPs), and the like.
- the TP and/or the TRP may include a panel of a base station, a transmission and reception unit, and the like.
- TRP refers to a panel, an antenna array, a cell (eg, macro cell / small cell / pico cell, etc.), It may be replaced with expressions such as TP (transmission point), base station (base station, gNB, etc.) and applied.
- TRPs may be classified according to information (eg, index, ID) on the CORESET group (or CORESET pool). For example, when one UE is configured to transmit/receive with multiple TRPs (or cells), this may mean that multiple CORESET groups (or CORESET pools) are configured for one UE. Configuration of such a CORESET group (or CORESET pool) may be performed through higher layer signaling (eg, RRC signaling, etc.).
- the base station may include a plurality of TRPs, or may be one cell including a plurality of TRPs.
- a UE may receive unicast traffic through a UE dedicated unicast PDSCH and receive multicast traffic such as MBS through a group common multicast PDSCH.
- the UE may transmit unicast HARQ-ACK information for unicast PDSCH and multicast HARQ-ACK information for multicast PDSCH.
- T-DAI Total DAI
- a DCI for scheduling a group common PDSCH ie, DCI scrambled by G-RNTI(s)
- PUSCH transmission ie, PUSCH transmission.
- FIG. 10 illustrates transmission timing of a unicast/multicast HARQ-ACK report in a wireless communication system to which the present disclosure can be applied.
- the terminal has a DCI (ie, unicast DCI) having a CRC scrambled with a C-RNTI (indicating high (er) priority (HP) or low (er) priority (LP)) and the DCI It is possible to receive a unicast PDSCH scheduled by (1001). And, the terminal may be configured to decode the unicast PDSCH and transmit a unicast HARQ-ACK to the base station based on the decoding result (1011).
- a DCI ie, unicast DCI
- C-RNTI indicating high (er) priority (HP) or low (er) priority (LP)
- the terminal may be configured to decode the unicast PDSCH and transmit a unicast HARQ-ACK to the base station based on the decoding result (1011).
- the terminal receives a DCI (i.e., multicast DCI) (indicating HP or LP) having a CRC scrambled with G-RNTI#1 and a multicast PDSCH scheduled by the DCI (i.e., the first multicast PDSCH) can (1002). And, the terminal may be set to decode the multicast PDSCH and transmit the multicast HARQ-ACK to the base station based on the decoding result (1012). In addition, the terminal receives a DCI (ie, multicast DCI) (indicating HP or LP) having a CRC scrambled with G-RNTI # 2 and a multicast PDSCH (ie, a second multicast PDSCH) scheduled by the DCI can (1003). And, the terminal may be configured to decode the multicast PDSCH and transmit the multicast HARQ-ACK to the base station based on the decoding result (1013).
- a DCI i.e., multicast DCI
- the terminal may be configured to decode the multi
- a UE can receive both a unicast PDCCH/PDSCH 1001 and multicast PDCCH/PDSCHs 1002 and 1003 transmitted by FDM or TDM.
- a unicast PDSCH occasion (1001) is transmitted in a TDM manner with a multicast PDSCH occasion (1002) for G-RNTI#1, and a multicast PDSCH occasion (1002) for G-RTNI#2. It can be transmitted by FDM method.
- the base station can set a common frequency resource (CFR), which is a frequency domain similar to BWP, and the terminal can receive multicast PDCCH/PDSCH through the corresponding CFR.
- CFR common frequency resource
- a UE in a connected mode can receive a unicast PDCCH/PDSCH by activating one DL BWP and receive a multicast PDCCH/PDSCH through a CFR connected to the activated DL BWP.
- the CFR and the DL BWP connected/associated with it overlap with each other, and since the CFR of the serving cell is included in the activated DL BWP, the UE transmits both the unicast PDSCH and the multicast PDSCH transmitted in the FDM method or the TDM method can receive If the terminal supports carrier aggregation (CA), the terminal can receive both unicast PDSCH and multicast PDSCH from a plurality of serving cells.
- the unicast PDSCH occasion is transmitted / configured in a TDM manner with the multicast PDSCH occasion for G-RNTI # 1, and transmitted / configured in an FDM manner with the multicast PDSCH occasion for G-RNTI # 2.
- the unicast PDSCH and the specific multicast PDSCH may be transmitted through the same or different serving cells, and multiple multicast PDSCHs may be transmitted through the same or different serving cells or different CFRs.
- the terminal selects either the FDM method or the TDM method Ambiguity arises as to which method to construct the Type 1 codebook based on.
- the unicast PDSCH occasion 1001 of FIG. 10 may be replaced with a multicast PDSCH occasion for G-RNTI #3.
- unicast HARQ-ACK 1011 for unicast PDSCH may be replaced with multicast HARQ-ACK for multicast PDSCH of G-RNTI#3.
- unicast ACK/NACK transmission may mean unicast HARQ-ACK transmission for unicast PDCCH/PDSCH
- multicast ACK/NACK transmission may mean multicast HARQ-ACK transmission for multicast PDCCH/PDSCH.
- multicast HARQ-ACK transmission can be divided into NACK only-based HARQ-ACK transmission and ACK/NACK-based HARQ-ACK transmission based on configuration/instruction/definition.
- 'Type 1 codebook' may mean a Type 1 HARQ-ACK codebook for HARQ-ACK reporting
- 'Type 2 codebook' may mean a Type 2 HARQ-ACK codebook for HARQ-ACK reporting.
- T-DAI for G-RNTI may mean T-DAI for multicast use
- T-DAI for unicast transmission may mean T-DAI for unicast use.
- the base station determines whether the unicast PDSCH and the multicast PDSCH are transmitted based on the FDM method or based on the TDM method for each G-RNTI, CFR, DL BWP, serving cell, or cell group. You can set whether to transmit or not.
- the base station may configure PUCCH configuration information (eg, PUCCH-config) for each BWP or CFR, and configure a k1 set through one PUCCH configuration information.
- the base station may set PDSCH configuration information (eg, PDSCH-config) for each BWP or CFR, and may set a start and length indicator value (SLIV) through one PDSCH configuration information.
- the terminal may configure/generate a Type 2 codebook based on a method described later according to the setting of the base station described above.
- the base station may allocate UL PUSCH resources or schedule DL PDSCH transmission through DCI.
- DCI transmitted by a base station to allocate UL PUSCH resources is referred to as UL DCI
- DL DCI DCI transmitted by the base station to schedule DL PDSCH transmission
- the UE receives a PUCCH resource indicator (PRI) through a group common DCI or UE specific DCI, and HARQ-ACK information for a PDSCH scheduled by the corresponding group common DCI or UE specific DCI It can be transmitted through PUCCH resources indicated by PRI. If the corresponding PUCCH transmission overlaps/collisions with the PUSCH transmission, the UE transmits the PUSCH instead of the PUCCH, and piggybacks uplink control information (UCI) including the HARQ-ACK information to the PUSCH to generate (UL) can transmit
- PRI PUCCH resource indicator
- the group common DCIs scheduling the group common PDSCH for a specific G-RNTI are counter DAI (hereinafter referred to as C-DAI) and total DAI (hereinafter referred to as T-DAI). ) may be included.
- C-DAI indicates the order of PDSCHs currently scheduled for a specific G-RNTI
- T-DAI indicates the total number of PDSCHs currently scheduled for a specific G-RNTI.
- a transport block (TB) transmitted in a PDSCH scheduled through a group common DCI may be retransmitted through point-to-point (PTP) retransmission.
- the UE can obtain the PDSCH transmission information for the corresponding TB using the UE-dedicated DL DCI in which the CRC is scrambled by the C-RNTI.
- the corresponding DL DCI may include C-DAI and T-DAI for the G-RNTI corresponding to TB.
- the previous two group common DCIs set [C-DAI, T-DAI] values to [0, 0], respectively. , [1, 1], and the UE-specific DCI for PTP retransmission may be transmitted by setting [2, 2].
- the UL DCI in which the CRC is scrambled by the C-RNTI may include the T-DAI for the G-RNTI transmission.
- the T-DAI value of the UL DCI is set to 1
- the T-DAI value of the UL DCI is 2 can be set and transmitted. That is, in consideration of the case where the UE does not receive the DL DCI transmitted immediately before the UL DCI, the base station may indicate the T-DAI for UCI transmission on the PUSCH through the UL DCI.
- HARQ-ACK codebook eg Type 2 codebook
- This embodiment relates to a method of separately configuring T-DAI information for unicast use and T-DAI information for multicast use in the above-described UL DCI.
- the UL DCI may include a T-DAI for multicast for multicast HARQ-ACK, separately from a T-DAI for unicast for unicast HARQ-ACK.
- a plurality of bits of a downlink assignment index (DAI) field of the UL DCI may be set/defined to indicate separate T-DAI for unicast and T-DAI for multicast, respectively.
- DAI downlink assignment index
- N LSB (least significant bit) bits and M MSB (most significant bit) bits of the first (1 st ) DAI field or the second (2 nd ) DAI field of DCI format 0_1 are each T- DAI and T-DAI for multicast can be indicated separately.
- M MSB bits and N LSB bits of the first (1 st ) DAI field or the second (2 nd ) DAI field of DCI format 0_1 indicate T-DAI for unicast and T-DAI for multicast, respectively. can do.
- a reserved field or a specific field of UL DCI may be configured/defined to indicate T-DAI for multicast purposes.
- T-DAI for multicast may be indicated through the ChannelAccess-CPext field of DCI format 0_1.
- the UL DCI may indicate a T-DAI value for multicast use through the following methods.
- the UL DCI may be configured/defined to indicate the sum of T-DAI values for all G-RNTIs reported as desired or interesting to be received by the corresponding UE.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for is 3, the T-DAI of the UL DCI may indicate 5 (ie, 2+3).
- the UL DCI may be configured/defined to indicate an individual T-DAI value for each G-RNTI reported as desired or interesting to be received by the corresponding UE.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for is 3, the UL DCI includes two T-DAIs separately, and each T-DAI may indicate 2 and 3.
- individual T-DAI values may be indicated through one field, and a plurality of T-DAI values are concatenated in one field to form one bit string or bitmap.
- T-DAI values for two G-RNTIs are N bits
- the T-DAI value for the lower G-RNTI value corresponds to N LSB bits or N MSB bits
- a bit string or bitmap may be configured/configured so that the T-DAI value for a high G-RNTI value corresponds to N MSB bits or N LSB bits.
- the base station may indicate the T-DAI for each G-RNTI as described below.
- the base station can indicate T-DAI for each G-RNTI only as many as the maximum number of G-RNTI. For example, when the maximum number of G-RNTIs is set to 2 through an RRC message, and the UE reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, the base station selects one of them.
- the UL DCI may be configured/determined to indicate only T-DAI values for two G-RNTIs having a high or low G-RNTI value, respectively.
- the base station selects among them.
- the UL DCI may be configured/determined to indicate only T-DAI values for two G-RNTIs with high priority (eg, high priority, HP), respectively.
- the UL DCI may be configured/determined to indicate only the T-DAI values for the two G-RNTIs previously designated through the RRC message.
- the base station may indicate T-DAI for each G-RNTI only for some selected G-RNTIs. For example, if the terminal reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, the base station informs the base station of the T-DAI of the two G-RNTIs through the RRC message.
- the UL DCI may be configured/determined to indicate only the values, respectively. Therefore, the T-DAI for the non-selected G-RNTI is not included in the corresponding UL DCI.
- the terminal may receive both high and low G-RNTI values. Only T-DAI values for G-RNTIs may be configured/defined to be recognized as being indicated through the corresponding UL DCI.
- the UE reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, even if the base station notifies/designates the two G-RNTIs with higher priority, the UE It may be set / specified to recognize that only T-DAI values for s are indicated through the corresponding UL DCI.
- the UL DCI may be configured/defined to indicate only the T-DAI value having the highest value among the individual T-DAI values for each G-RNTI reported as desired or interesting to be received by the corresponding UE.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for is 3, the UL DCI may indicate 3 corresponding to the highest T-DAI value of the two.
- the corresponding UL DCI may additionally indicate an index indicating G-RNTI#2.
- all G-RNTIs reported as desired or interesting to be received by the corresponding terminal are set to a plurality of G-RNTI groups, and the UL DCI is set to indicate the T-DAI value for each G-RNTI group / can be stipulated.
- the terminal reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, the base station transmits G-RNTI#1 and G-RNTI#2 to the base station through an RRC message. It may be set/designated as a G-RNTI group, and G-RNTI#3 may be set/designated as a second G-RNTI group.
- the base station may configure / determine the UL DCI to indicate the T-DAI values for the two G-RNTI groups, respectively.
- the T-DAI value of the first G-RNTI group may indicate the sum of T-DAI values of all G-RNTIs in the corresponding group.
- the T-DAI value of the second G-RNTI group may indicate the highest T-DAI value for all G-RNTIs in the corresponding group.
- the T-DAI value of the second G-RNTI group including only one G-RNTI may be the same as the T-DAI value for G-RNTI#3.
- the UE only based on the T-DAI of the DL DCI Type 2 codebook can be configured.
- This embodiment relates to a method of configuring by combining T-DAI information for unicast use and T-DAI information for multicast use in the above-described UL DCI.
- the UL DCI can be indicated as in the methods proposed in this embodiment by combining T-DAI for unicast for unicast HARQ-ACK and T-DAI for multicast for multicast HARQ-ACK.
- the DAI value of the methods proposed in this embodiment may be transmitted through a group common MAC-CE instead of the UL DCI.
- the PDSCH resource through which the group common MAC-CE is transmitted may be allocated by UL DCI.
- the UL DCI may be configured/defined to indicate the sum of the T-DAI value for all G-RNTIs that the UE wants to receive or is interested in receiving and the T-DAI value for unicast transmission.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for unicast transmission is 3 and the current T-DAI for unicast transmission is 1, the T-DAI of UL DCI may indicate 6 (ie, 2 + 3 + 1).
- the UL DCI may be configured/defined to separately indicate an individual T-DAI value for each G-RNTI that the UE wants to receive or is interested in receiving and a T-DAI value for unicast transmission. there is. That is, the T-DAI value for each G-RNTI and the T-DAI value for unicast are indicated respectively.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for unicast transmission is 3 and the current T-DAI for unicast transmission is 1, the UL DCI includes three T-DAIs separately, and each T-DAI indicates 1, 2, and 3 can do.
- individual T-DAI values may be indicated through one field, and a plurality of T-DAI values are concatenated in one field to form one bit string or bitmap.
- a bit string or bitmap may be configured/configured so that the T-DAI value for a high G-RNTI value corresponds to N MSB bits or N LSB bits.
- a final bit string or bitmap may be configured/set by concatenating T-DAI values for unicast use.
- the base station may indicate T-DAI for unicast use and T-DAI for each G-RNTI as described below.
- the base station can indicate T-DAI for each G-RNTI only as many as the maximum number of G-RNTI. For example, when the maximum number of G-RNTIs is set to 2 through an RRC message, and the UE reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, the base station selects one of them.
- the UL DCI may be configured/determined to indicate only T-DAI values for two G-RNTIs having a high or low G-RNTI value, respectively.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the base station selects among them.
- the UL DCI may be configured/determined to indicate only T-DAI values for two G-RNTIs with high priority (eg, high priority, HP), respectively.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the corresponding UL DCI may be configured to indicate only T-DAI for unicast or T-DAI(s) for G-RNTI with high priority, respectively.
- the UL DCI may be configured/determined to indicate only the T-DAI values for the two G-RNTIs previously designated through the RRC message.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the base station may indicate T-DAI for each G-RNTI only for some selected G-RNTIs.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together. For example, if the terminal reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, the base station informs the base station of the T-DAI of the two G-RNTIs through the RRC message.
- the UL DCI may be configured/determined to indicate only the values, respectively. Therefore, the T-DAI for the non-selected G-RNTI is not included in the corresponding UL DCI.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the terminal reports to the base station to receive G-RNTI#1, G-RNTI#2, and G-RNTI#3, even if the base station notifies/designates, the terminal may receive both high and low G-RNTI values. Only T-DAI values for G-RNTIs may be configured/defined to be recognized as being indicated through the corresponding UL DCI.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the UE may be set / specified to recognize that only T-DAI values for s are indicated through the corresponding UL DCI.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- the UE recognizes that only the T-DAI for unicast or T-DAI(s) for G-RNTI with high priority is indicated through the corresponding UL DCI. can be set/defined to do so.
- the UL DCI is the T-DAI having the highest value among the individual T-DAI values for each G-RNTI that the UE wants to receive or is interested in receiving and the T-DAI value for unicast Can be set/defined to indicate only values.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and G-RNTI#2 If the current T-DAI for unicast transmission is 3 and the current T-DAI for unicast transmission is 1, the UL DCI may indicate 3 corresponding to the highest T-DAI value.
- the corresponding UL DCI may additionally indicate an index indicating G-RNTI#2.
- the UE reports to the base station to receive PDSCHs for G-RNTI#1 and G-RNTI#2, the current T-DAI for G-RNTI#1 is 2, and the current T-DAI for G-RNTI#2 is If the current T-DAI is 3 and the current T-DAI for unicast transmission is 4, the UL DCI may indicate 4 corresponding to the highest T-DAI value.
- the corresponding UL DCI may additionally indicate an index indicating unicast transmission.
- all G-RNTIs reported as desired or interesting to be received by the corresponding terminal are set to a plurality of G-RNTI groups, and the UL DCI is set to indicate the T-DAI value for each G-RNTI group / can be stipulated.
- the corresponding UL DCI may be configured to indicate or not indicate the T-DAI for unicast purposes together.
- T-DAI for unicast may be set to be included in a specific G-RNTI group.
- the base station transmits G-RNTI#1 and G-RNTI#2 to the base station through an RRC message. It can be set/designated as a group, and G-RNTI#3 and unicast transmission can be set/designated as a second group. Then, the base station may configure / determine the UL DCI to indicate the T-DAI values for the two groups, respectively.
- the T-DAI value of each group may indicate the sum of all T-DAI values in the corresponding group.
- the T-DAI value of each group may indicate the highest T-DAI value in that group.
- This embodiment relates to a method for determining a T-DAI value of UL DCI based on whether HARQ-ACK is deactivated.
- HARQ-ACK transmission for PDSCH reception corresponding to a specific G-RNTI may be activated or deactivated through a group common DCI indication or RRC configuration. That is, HARQ-ACK transmission/reporting can be activated/deactivated in units of G-RNTI.
- the UE may determine that the T-DAI for the specific G-RNTI is not included in the UL DCI.
- the corresponding UE includes the T-DAI for the specific G-RNTI in the UL DCI can be judged to be Alternatively, even when HARQ-ACK transmission for a specific G-RNTI is disabled through DCI, the UE may determine that the T-DAI for the specific G-RNTI is not included in the UL DCI.
- the UL DCI can be replaced with a DL DCI CRC scrambled by the corresponding G-RNTI and/or a DL DCI scheduling PTP transmission of TB for the corresponding G-RNTI.
- This embodiment relates to a method of configuring a Type 2 codebook according to a DCI-based HARQ-ACK deactivation indication.
- DAI downlink assignment index
- HARQ-ACK for a specific G-RNTI is deactivated in the first UE (hereinafter, UE#1) through the RRC message, HARQ-ACK cannot be activated again through DCI.
- the second UE (hereinafter referred to as UE#2) may be set to activate HARQ-ACK for the same G-RNTI through an RRC message and deactivate HARQ-ACK through DCI.
- the base station may activate or deactivate HARQ-ACK for different group common (PDSCH) (GC-PDSCH) transmissions through the group common DCI for UE#2.
- PDSCH group common
- GC-PDSCH group common
- HARQ-ACK is performed through DCI for the first group common PDSCH transmission (ie, GC-PDSCH#1) and the third group common PDSCH transmission (ie, GC-PDSCH#3).
- HARQ-ACK may be deactivated through DCI for the second group common PDSCH transmission (ie, GC-PDSCH#2).
- the base station can configure the terminal to operate in one of two operations described later (operation 1 and operation 2). That is, the base station may separately set whether the terminal should count the DAI value included in the DCI indicating inactivation of HARQ-ACK.
- the corresponding setting may be set for each specific G-RNTI or specific CFR through an RRC message, MAC-CE, and/or DCI.
- the base station may set the UE configured in the UE#1 method and the UE configured in the UE#2 method to coexist in the same group through RRC configuration. .
- the UE configured in the UE#2 method may ignore the DAI field indicated by the corresponding DCI.
- the corresponding UE may be configured to transmit NACK (regardless of the decoding result). That is, even when the corresponding DCI disables HARQ-ACK, the UE can transmit HARQ-ACK information through PUCCH or PUSCH by fixing it to NACK.
- the base station may configure only the terminal(s) configured in the UE#2 method to coexist in the same group through RRC configuration.
- the UE configured in the UE#2 method may ignore the DAI field indicated by the corresponding DCI.
- the corresponding UE may not transmit the PUCCH. That is, when the corresponding DCI disables HARQ-ACK, the UE may not transmit UCI for HARQ-ACK information.
- the corresponding terminals may not transmit PUCCH for HARQ-ACK information.
- the UE can transmit a PUCCH composed of 5-bit HARQ-ACK information.
- the UE can transmit a PUCCH composed of 6-bit HARQ-ACK information.
- This embodiment relates to a method of configuring a Type 2 codebook when a terminal receives one or more services.
- the one or more services may mean one or more multicast PDSCHs scrambled by one or more G-RNTIs.
- the terminal may configure/generate a Type 2 codebook by counting DCI for each G-RNTI.
- the UE constructs a Type 2 based HARQ-ACK sub-codebook for each G-RNTI, and concatenates sub-codebooks for each G-RNTI value to obtain a Type 2 codebook. can be configured.
- the terminal when the terminal reports the G-RNTI(s) of interest (ie, to receive) to the base station, the terminal configures a Type 2 based HARQ-ACK sub-codebook for each G-RNTI, and A Type 2 codebook can be configured by concatenating each sub-codebook.
- the terminal configures a codebook according to the DAI value of the DCI for the G-RNTI of the DCI actually received, and configures the codebook according to the DAI value set by the base station in advance for the G-RNTI of the DCI that is not actually received. can be configured.
- the DAI value may be fixed to 0 or 1 or set.
- FIG. 12 is a diagram illustrating an operation of a terminal for a method for transmitting and receiving control information according to an embodiment of the present disclosure.
- FIG. 12 illustrates an operation of a terminal based on the previously proposed method (eg, any one or a plurality of combinations of embodiments 1 to 5 and detailed embodiments thereof).
- the example of FIG. 12 is for convenience of explanation and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 12 may be omitted depending on circumstances and/or settings.
- the terminal in FIG. 12 is only one example, and may be implemented as a device illustrated in FIG. 14 below.
- the processor 102/202 of FIG. 14 uses the transceiver 106/206 to perform channel/signal/data/information, etc. (eg, RRC signaling, MAC CE, UL/DL scheduling). DCI, SRS, PDCCH, PDSCH, PUSCH, PUCCH, etc.) can be controlled to be transmitted and received, and transmitted or received channels/signals/data/information, etc. can be controlled to be stored in the memory 104/204.
- channel/signal/data/information eg, RRC signaling,
- the terminal may receive multicast PDSCHs based on one or more G-RNTIs from the base station.
- a UE may receive a PDSCH scheduled by a CRC scrambled DCI based on at least one G-RNTI.
- the terminal may receive DCI for scheduling a PUSCH from the base station.
- the corresponding DCI may correspond to the UL DCI in the above-described embodiments (eg, embodiments 1 to 5).
- the DCI includes information on the T-DAI value (eg, DAI field) for the HARQ-ACK codebook for unicast and the T-DAI value (eg, DAI field) for the HARQ-ACK codebook for multicast. It can be set/defined to independently include/instruct information on
- the T-DAI value for the HARQ-ACK codebook for unicast corresponds to the above-mentioned T-DAI value for unicast use
- the T-DAI value for the HARQ-ACK codebook for multicast is the above-mentioned T-DAI value for multicast use. It may correspond to -DAI value.
- the T-DAI value for the HARQ-ACK codebook for multicast may be applied to one or more G-RNTIs. That is, when a plurality of G-RNTIs are used/applied, the T-DAI value may be equally applied to the plurality of G-RNTIs.
- the T-DAI value for the HARQ-ACK codebook for multicast is T for each of one or more G-RNTIs. -Can be set to correspond to the T-DAI value having the highest value among DAI values.
- the corresponding DCI may further include information (eg, index, ID, etc.) indicating the G-RNTI corresponding to the T-DAI value having the highest value.
- activation/deactivation of HARQ-ACK reporting may be set/instructed in units of G-RNTI.
- the corresponding DCI may be configured/defined so as not to include a T-DAI value corresponding to the specific G-RNTI.
- Deactivation of transmission of HARQ-ACK information for the specific G-RNTI may be performed based on group common DCI and/or higher layer signaling (eg, RRC signaling/configuration).
- the UE may determine at least one HARQ-ACK codebook for the multicast PDSCHs by applying a T-DAI value for each G-RNTI.
- T-DAI for HARQ-ACK codebook for multicast included in DCI in step S1220 A value is applied in units of G-RNTI, and an HARQ-ACK sub-codebook corresponding to each G-RNTI may be determined/generated.
- the terminal may generate HARQ-ACK information by concatenating at least one HARQ-ACK codebook determined as described above, and transmit/report it to the base station.
- the at least one HARQ-ACK codebook is arranged according to an ascending order of G-RNTI values. Can be set/defined to be concatenated.
- the HARQ-ACK information can be transmitted / reported on the PUSCH scheduled by the DCI in step S1220, based on the Type-2 HARQ-ACK codebook method predefined in the standard (eg, 3GPP TS 38.213 document) It may be information generated by
- FIG. 13 is a diagram illustrating an operation of a base station for a method for transmitting and receiving control information according to an embodiment of the present disclosure.
- FIG. 13 illustrates an operation of a terminal based on the previously proposed method (eg, any one or a plurality of combinations of embodiments 1 to 5 and detailed embodiments thereof).
- the example of FIG. 13 is for convenience of description and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 13 may be omitted depending on circumstances and/or settings.
- the terminal in FIG. 13 is only one example, and may be implemented as a device illustrated in FIG. 14 below.
- the processor 102/202 of FIG. 14 uses the transceiver 106/206 to perform channel/signal/data/information, etc. (eg, RRC signaling, MAC CE, UL/DL scheduling). DCI, SRS, PDCCH, PDSCH, PUSCH, PUCCH, etc.) can be controlled to be transmitted and received, and transmitted or received channels/signals/data/information, etc. can be controlled to be stored in the memory 104/204.
- channel/signal/data/information eg, RRC signaling,
- the base station may transmit multicast PDSCHs based on one or more G-RNTIs to the terminal. For example, as in the above-described embodiments (eg, embodiments 1 to 5), the base station may transmit a PDSCH scheduled by a CRC scrambled DCI based on at least one G-RNTI.
- the base station may transmit a DCI for scheduling a PUSCH to the terminal.
- the corresponding DCI may correspond to the UL DCI in the above-described embodiments (eg, embodiments 1 to 5).
- the DCI includes information on the T-DAI value (eg, DAI field) for the HARQ-ACK codebook for unicast and the T-DAI value (eg, DAI field) for the HARQ-ACK codebook for multicast. It can be set/defined to independently include/instruct information on
- the T-DAI value for the HARQ-ACK codebook for unicast corresponds to the above-mentioned T-DAI value for unicast use
- the T-DAI value for the HARQ-ACK codebook for multicast is the above-mentioned T-DAI value for multicast use. It may correspond to -DAI value.
- the T-DAI value for the HARQ-ACK codebook for multicast may be applied to one or more G-RNTIs. That is, when a plurality of G-RNTIs are used/applied, the T-DAI value may be equally applied to the plurality of G-RNTIs.
- the T-DAI value for the HARQ-ACK codebook for multicast is T for each of one or more G-RNTIs. -Can be set to correspond to the T-DAI value having the highest value among DAI values.
- the corresponding DCI may further include information (eg, index, ID, etc.) indicating the G-RNTI corresponding to the T-DAI value having the highest value.
- activation/deactivation of HARQ-ACK reporting may be set/instructed in units of G-RNTI.
- the corresponding DCI may be configured/defined so as not to include a T-DAI value corresponding to the specific G-RNTI.
- Deactivation of transmission of HARQ-ACK information for the specific G-RNTI may be performed based on group common DCI and/or higher layer signaling (eg, RRC signaling/configuration).
- the base station may receive HARQ-ACK information from the terminal.
- the HARQ-ACK information applies a T-DAI value for each G-RNTI (by the terminal) It may be information determined/generated by concatenating at least one HARQ-ACK codebook for multicast PDSCHs determined/generated by doing so.
- the HARQ-ACK information may be generated based on a HARQ-ACK codebook generated by concatenating HARQ-ACK sub-codebooks corresponding to each G-RNTI.
- the at least one HARQ-ACK codebook is concatenated in ascending order of G-RNTI values. Can be set/prescribed.
- the HARQ-ACK information can be transmitted and received through the PUSCH scheduled by the DCI in step S1320, based on the Type-2 HARQ-ACK codebook method predefined in the standard (eg, 3GPP TS 38.213 document) It may be generated information.
- FIG. 14 illustrates a block configuration diagram of a wireless communication device according to an embodiment of the present disclosure.
- the first wireless device 100 and the second wireless device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE and NR).
- various radio access technologies eg, LTE and NR.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108.
- the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations set forth in this disclosure.
- the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106.
- the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104.
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
- memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure. It may store software codes including them.
- the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- a wireless device may mean a communication modem/circuit/chip.
- the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
- the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations set forth in this disclosure.
- the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206.
- the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 .
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
- memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure. It may store software codes including them.
- the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
- the transceiver 206 may include a transmitter and/or a receiver.
- the transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may mean a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors 102, 202.
- one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- processors 102, 202 may generate messages, control information, data or information in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams set forth in this disclosure.
- One or more processors 102, 202 may process PDUs, SDUs, messages, control information, data or signals containing information (e.g., baseband signals) according to the functions, procedures, proposals and/or methods disclosed herein. generated and provided to one or more transceivers (106, 206).
- One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, the descriptions, functions, procedures, suggestions, methods and/or described in this disclosure.
- PDUs, SDUs, messages, control information, data or information may be acquired according to the operational flowcharts.
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer.
- One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
- Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed in this disclosure may be included in one or more processors (102, 202) or stored in one or more memories (104, 204). It can be driven by the above processors 102 and 202.
- the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed in this disclosure may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
- One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts of this disclosure, to one or more other devices.
- the one or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed in this disclosure from one or more other devices. there is.
- one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals.
- one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 may be connected to one or more antennas 108, 208, as described herein. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc.
- one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
- One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal.
- One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals.
- one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.
- the scope of the present disclosure is software or machine-executable instructions (eg, operating systems, applications, firmware, programs, etc.) that cause operations in accordance with the methods of various embodiments to be executed on a device or computer, and such software or It includes a non-transitory computer-readable medium in which instructions and the like are stored and executable on a device or computer. Instructions that may be used to program a processing system that performs the features described in this disclosure may be stored on/in a storage medium or computer-readable storage medium and may be viewed using a computer program product that includes such storage medium. Features described in the disclosure may be implemented.
- the storage medium may include, but is not limited to, high speed random access memory such as DRAM, SRAM, DDR RAM or other random access solid state memory devices, one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or It may include non-volatile memory, such as other non-volatile solid state storage devices.
- the memory optionally includes one or more storage devices located remotely from the processor(s).
- the memory, or alternatively, the non-volatile memory device(s) within the memory includes non-transitory computer readable storage media.
- Features described in this disclosure may be stored on any one of the machine readable media to control hardware of a processing system and to allow the processing system to interact with other mechanisms that utilize results according to embodiments of the present disclosure. It may be integrated into software and/or firmware.
- Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments/containers.
- the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may include Narrowband Internet of Things for low power communication as well as LTE, NR, and 6G.
- NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. no.
- the wireless communication technology implemented in the wireless device (XXX, YYY) of the present disclosure may perform communication based on LTE-M technology.
- LTE-M technology may be an example of LPWAN technology, and may be called various names such as eMTC (enhanced machine type communication).
- LTE-M technologies are 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) It may be implemented in at least one of various standards such as LTE M, and is not limited to the above-mentioned names.
- the wireless communication technology implemented in the wireless device (XXX, YYY) of the present disclosure includes at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low power communication. It may include any one, and is not limited to the above-mentioned names.
- ZigBee technology can generate personal area networks (PANs) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called various names.
- PANs personal area networks
- the method proposed in the present disclosure has been described focusing on examples applied to 3GPP LTE/LTE-A and 5G systems, but can be applied to various wireless communication systems other than 3GPP LTE/LTE-A and 5G systems.
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Abstract
Description
μ | Δf=2μ·15 [kHz] | CP |
0 | 15 | 일반(Normal) |
1 | 30 | 일반 |
2 | 60 | 일반, 확장(Extended) |
3 | 120 | 일반 |
4 | 240 | 일반 |
주파수 범위 지정(Frequency Range designation) | 해당 주파수 범위(Corresponding frequency range) | 서브캐리어 간격(Subcarrier Spacing) |
FR1 | 410MHz - 7125MHz | 15, 30, 60kHz |
FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
μ | Nsymb slot | Nslot frame,μ | Nslot subframe,μ |
0 | 14 | 10 | 1 |
1 | 14 | 20 | 2 |
2 | 14 | 40 | 4 |
3 | 14 | 80 | 8 |
4 | 14 | 160 | 16 |
μ | Nsymb slot | Nslot frame,μ | Nslot subframe,μ |
2 | 12 | 40 | 4 |
DCI 포맷 | 활용 |
0_0 | 하나의 셀 내 PUSCH의 스케줄링 |
0_1 | 하나의 셀 내 하나 또는 다중 PUSCH의 스케줄링, 또는 UE에게 셀 그룹(CG: cell group) 하향링크 피드백 정보의 지시 |
0_2 | 하나의 셀 내 PUSCH의 스케줄링 |
1_0 | 하나의 DL 셀 내 PDSCH의 스케줄링 |
1_1 | 하나의 셀 내 PDSCH의 스케줄링 |
1_2 | 하나의 셀 내 PDSCH의 스케줄링 |
PDSCH-Config ::= SEQUENCE { dataScramblingIdentityPDSCH INTEGER (0..1023) OPTIONAL, -- Need S dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease { DMRS-DownlinkConfig } OPTIONAL, -- Need M dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease { DMRS-DownlinkConfig } OPTIONAL, -- Need M tci-StatesToAddModList SEQUENCE (SIZE(1..maxNrofTCI-States)) OF TCI-State OPTIONAL, -- Need N tci-StatesToReleaseList SEQUENCE (SIZE(1..maxNrofTCI-States)) OF TCI-StateId OPTIONAL, -- Need N vrb-ToPRB-Interleaver ENUMERATED {n2, n4} OPTIONAL, -- Need S resourceAllocation ENUMERATED { resourceAllocationType0, resourceAllocationType1, dynamicSwitch}, pdsch-TimeDomainAllocationList SetupRelease { PDSCH-TimeDomainResourceAllocationList } OPTIONAL, -- Need M pdsch-AggregationFactor ENUMERATED { n2, n4, n8 } OPTIONAL, -- Need S rateMatchPatternToAddModList SEQUENCE (SIZE (1..maxNrofRateMatchPatterns)) OF RateMatchPattern OPTIONAL, -- Need N rateMatchPatternToReleaseList SEQUENCE (SIZE (1..maxNrofRateMatchPatterns)) OF RateMatchPatternId OPTIONAL, -- Need N rateMatchPatternGroup1 RateMatchPatternGroup OPTIONAL, -- Need R rateMatchPatternGroup2 RateMatchPatternGroup OPTIONAL, -- Need R rbg-Size ENUMERATED {config1, config2}, mcs-Table ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S maxNrofCodeWordsScheduledByDCI ENUMERATED {n1, n2} ... } |
PDSCH-Config field descriptions |
dataScramblingIdentityPDSCH, dataScramblingIdentityPDSCH2Identifier(s) used to initialize data scrambling (c_init) for PDSCH. The dataScramblingIdentityPDSCH2 is configured if coresetPoolIndex is configured with 1 for at least one CORESET in the same BWP. |
dmrs-DownlinkForPDSCH-MappingTypeA, dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2DMRS configuration for PDSCH transmissions using PDSCH mapping type A (chosen dynamically via PDSCH-TimeDomainResourceAllocation). Only the fields dmrs-Type, dmrs-AdditionalPosition and maxLength may be set differently for mapping type A and B. The field dmrs-DownlinkForPDSCH-MappingTypeA applies to DCI format 1_1 and the field dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2 applies to DCI format 1_2. |
dmrs-DownlinkForPDSCH-MappingTypeB, dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2DMRS configuration for PDSCH transmissions using PDSCH mapping type B (chosen dynamically via PDSCH-TimeDomainResourceAllocation). Only the fields dmrs-Type, dmrs-AdditionalPosition and maxLength may be set differently for mapping type A and B. The field dmrs-DownlinkForPDSCH-MappingTypeB applies to DCI format 1_1 and the field dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2 applies to DCI format 1_2. |
maxNrofCodeWordsScheduledByDCIMaximum number of code words that a single DCI may schedule. This changes the number of MCS/RV/NDI bits in the DCI message from 1 to 2. |
mcs-Table, mcs-TableDCI-1-2Indicates which MCS table the UE shall use for PDSCH. If the field is absent the UE applies the value 64QAM. The field mcs-Table applies to DCI format 1_0 and DCI format 1_1, and the field mcs-TableDCI-1-2 applies to DCI format 1_2. |
pdsch-AggregationFactorNumber of repetitions for data. When the field is absent the UE applies the value 1. |
pdsch-TimeDomainAllocationList, pdsch-TimeDomainAllocationListDCI-1-2List of time-domain configurations for timing of DL assignment to DL data. The field pdsch-TimeDomainAllocationList (with or without suffix) applies to DCI format 1_0 and DCI format 1_1, and if the field pdsch-TimeDomainAllocationListDCI-1-2 is not configured, to DCI format 1_2. If the field pdsch-TimeDomainAllocationListDCI-1-2 is configured, it applies to DCI format 1_2. The network does not configure the pdsch-TimeDomainAllocationList-r16 simultaneously with the pdsch-TimeDomainAllocationList (without suffix) in the same PDSCH-Config. |
rateMatchPatternGroup1, rateMatchPatternGroup1DCI-1-2The IDs of a first group of RateMatchPatterns defined in PDSCH-Config->rateMatchPatternToAddModList (BWP level) or in ServingCellConfig ->rateMatchPatternToAddModList (cell level). These patterns can be activated dynamically by DCI. The field rateMatchPatternGroup1 applies to DCI format 1_1, and the field rateMatchPatternGroup1DCI-1-2 applies to DCI format 1_2. |
rateMatchPatternGroup2, rateMatchPatternGroup2DCI-1-2The IDs of a second group of RateMatchPatterns defined in PDSCH-Config->rateMatchPatternToAddModList (BWP level) or in ServingCellConfig ->rateMatchPatternToAddModList (cell level). These patterns can be activated dynamically by DCI. The field rateMatchPatternGroup2 applies to DCI format 1_1, and the field rateMatchPatternGroup2DCI-1-2 applies to DCI format 1_2. |
rateMatchPatternToAddModListResources patterns which the UE should rate match PDSCH around. The UE rate matches around the union of all resources indicated in the rate match patterns. |
rbg-SizeSelection between config 1 and config 2 for RBG size for PDSCH. The UE ignores this field if resourceAllocation is set to resourceAllocationType1. |
resourceAllocation, resourceAllocationDCI-1-2Configuration of resource allocation type 0 and resource allocation type 1 for non-fallback DCI. The field resourceAllocation applies to DCI format 1_1, and the field resourceAllocationDCI-1-2 applies to DCI format 1_2. |
resourceAllocationType1GranularityDCI-1-2Configure the scheduling granularity applicable for both the starting point and length indication for resource allocation type 1 in DCI format 1_2. If this field is absent, the granularity is 1 PRB. |
tci-StatesToAddModListA list of Transmission Configuration Indicator (TCI) states indicating a transmission configuration which includes QCL-relationships between the DL RSs in one RS set and the PDSCH DMRS ports. |
vrb-ToPRB-Interleaver, vrb-ToPRB-InterleaverDCI-1-2Interleaving unit configurable between 2 and 4 PRBs. When the field is absent, the UE performs non-interleaved VRB-to-PRB mapping. |
Claims (14)
- 무선 통신 시스템에서 단말에 의해서 상향링크 전송을 수행하는 방법에 있어서, 상기 방법은:기지국으로부터, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 수신하는 단계;상기 기지국으로부터, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 수신하는 단계,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여, 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북들을 결정하는 단계; 및상기 기지국으로, 상기 다수의 HARQ-ACK 코드북들을 연접하여 결정된 HARQ-ACK 정보를 전송하는 단계를 포함하는, 방법.
- 제1항에 있어서,상기 T-DAI 값은 유니캐스트(unicast)에 대한 HARQ-ACK 코드북을 위한 T-DAI 값과 독립적으로 지시되는, 방법.
- 제1항에 있어서,상기 다수의 HARQ-ACK 코드북들은 G-RNTI 값의 오름차순(ascending order)에 따라 연접되는, 방법.
- 제1항에 있어서,상기 HARQ-ACK 정보는 상기 DCI에 의해 스케줄링되는 상기 PUSCH를 통해 전송되는, 방법.
- 제4항에 있어서,상기 HARQ-ACK 정보는 상기 PUSCH를 통해 전송되는 Type-2 HARQ-ACK 코드북 방식에 기반하여 생성되는, 방법.
- 제1항에 있어서,상기 T-DAI 값은 상기 다수의 G-RNTI들 각각에 대한 T-DAI 값 중 가장 높은 값을 가지는 T-DAI 값에 해당하는, 방법.
- 제6항에 있어서,상기 DCI는 상기 가장 높은 값을 가지는 T-DAI 값에 대응하는 G-RNTI를 나타내는 정보를 포함하는, 방법
- 제1항에 있어서,특정 G-RNTI에 대한 HARQ-ACK 정보의 전송이 비활성화됨에 기반하여, 상기 DCI는 상기 특정 G-RNTI에 해당하는 T-DAI 값을 포함하지 않는, 방법.
- 제8항에 있어서,상기 특정 G-RNTI에 대한 HARQ-ACK 정보의 전송의 비활성화는 그룹 공통 DCI 또는 RRC(Radio Resource Control) 설정 중 적어도 하나에 기반하여 수행되는, 방법.
- 무선 통신 시스템에서 상향링크 전송을 수행하는 단말에 있어서, 상기 단말은:하나 이상의 송수신기; 및상기 하나 이상의 송수신기와 연결된 하나 이상의 프로세서를 포함하고,상기 하나 이상의 프로세서는:기지국으로부터, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 수신하고;상기 기지국으로부터, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 수신하고,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여, 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북을 결정하며;상기 기지국으로, 상기 다수의 HARQ-ACK 코드북을 연접하여 결정된 HARQ-ACK 정보를 전송하도록 설정되는, 단말
- 무선 통신 시스템에서 기지국에 의해서 상향링크 수신을 수행하는 방법에 있어서, 상기 방법은:단말로, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 전송하는 단계;상기 단말로, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 전송하는 단계,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 단말로부터, HARQ-ACK 정보를 수신하는 단계를 포함하되,상기 HARQ-ACK 정보는, 상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여 결정된 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북들을 연접하여 결정되는, 방법.
- 무선 통신 시스템에서 상향링크 수신을 수행하는 기지국에 있어서, 상기 기지국은:하나 이상의 송수신기; 및상기 하나 이상의 송수신기와 연결된 하나 이상의 프로세서를 포함하고,상기 하나 이상의 프로세서는:단말로, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 전송하고;상기 단말로, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 전송하고,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 단말로부터, HARQ-ACK 정보를 수신하도록 설정하되,상기 HARQ-ACK 정보는, 상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여 결정된 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북들을 연접하여 결정되는, 기지국.
- 무선 통신 시스템에서 상향링크 전송을 수행하기 위해 단말을 제어하도록 설정되는 프로세싱 장치에 있어서, 상기 프로세싱 장치는:하나 이상의 프로세서; 및상기 하나 이상의 프로세서에 동작 가능하게 연결되고, 상기 하나 이상의 프로세서에 의해 실행됨에 기반하여, 동작들을 수행하는 명령들을 저장하는 하나 이상의 컴퓨터 메모리를 포함하며,상기 동작들은:기지국으로부터, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 수신하는 동작;상기 기지국으로부터, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 수신하는 동작,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여, 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북들을 결정하는 동작; 및상기 기지국으로, 상기 다수의 HARQ-ACK 코드북들을 연접하여 결정된 HARQ-ACK 정보를 전송하는 동작을 포함하는, 프로세싱 장치.
- 하나 이상의 명령을 저장하는 하나 이상의 비-일시적(non-transitory) 컴퓨터 판독가능 매체로서,상기 하나 이상의 명령은 하나 이상의 프로세서에 의해서 실행되어, 무선 통신 시스템에서 상향링크 전송을 수행하는 장치가:기지국으로부터, 다수의 G-RNTI(Group-Radio Network Temporary Identifier)들에 기반하여 멀티캐스트 물리 하향링크 공유 채널(multicast physical downlink shared channel, multicast PDSCH)들을 수신하고;상기 기지국으로부터, 물리 상향링크 공유 채널(physical uplink shared channel, PUSCH)을 스케줄링하는 하향링크 제어 정보(downlink control information, DCI)를 수신하고,상기 DCI는 멀티캐스트에 대한 HARQ-ACK(Hybrid Automatic Repeat and reQuest-Acknowledgement) 코드북을 위한 T-DAI(Total-Downlink Assignment Index) 값에 대한 정보를 포함하며;상기 다수의 G-RNTI들에 대해 G-RNTI 별로 상기 T-DAI 값을 적용하여, 상기 멀티캐스트 PDSCH들에 대한 다수의 HARQ-ACK 코드북들을 결정하며;상기 기지국으로, 상기 다수의 HARQ-ACK 코드북들을 연접하여 결정된 HARQ-ACK 정보를 전송하도록 제어하는, 컴퓨터 판독가능 매체.
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CATT ET AL.: "Discussion on reliability improvement mechanism for RRC_CONNECTED UEs in MBS", 3GPP TSG RAN WG1 MEETING #106-E, R1-2106946, XP052038119 * |
NOKIA, NOKIA SHANGHAI BELL: "PDSCH/PUSCH enhancements", 3GPP TSG RAN WG1 MEETING #106-E, R1-2107108, 7 August 2021 (2021-08-07), XP052041724 * |
SAMSUNG: "PDSCH/PUSCH enhancements for NR from 52.6 GHz to 71 GHz", 3GPP TSG RAN WG1 MEETING #106-E, R1-2106877, XP052033318 * |
ZTE: "Discussion on mechanisms to Improve Reliability for RRC_CONNECTED UEs", 3GPP TSG RAN WG1 MEETING #106-E, R1-2106746, 7 August 2021 (2021-08-07), XP052038012 * |
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